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* [git patches] IDE updates part #4
@ 2008-02-02 19:35 Bartlomiej Zolnierkiewicz
  2008-02-05 19:09 ` Linus Torvalds
  0 siblings, 1 reply; 4+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2008-02-02 19:35 UTC (permalink / raw)
  To: Linus Torvalds; +Cc: linux-ide, linux-kernel


This time:

* ide-floppy/ide-tape revamps similar to previous ide-cd redux
  (Borislav Petkov)

* next part of IDE probing code re-organization saga
  (that would be me)

* misc cleanups/fixes

As a result drivers/ide/ shrinks by ~1300 LOC...


Linus, please pull from:

master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6.git/

to receive the following updates:

 Documentation/ide/ChangeLog.ide-tape.1995-2002 |  257 +++++
 Documentation/ide/ide-tape.txt                 |  146 +++
 drivers/ide/Kconfig                            |    3 +-
 drivers/ide/arm/bast-ide.c                     |   20 +-
 drivers/ide/arm/icside.c                       |   25 +-
 drivers/ide/arm/ide_arm.c                      |    2 +-
 drivers/ide/arm/rapide.c                       |    4 +-
 drivers/ide/cris/ide-cris.c                    |   24 +-
 drivers/ide/h8300/ide-h8300.c                  |    2 +-
 drivers/ide/ide-acpi.c                         |   63 +-
 drivers/ide/ide-cd.c                           |    2 -
 drivers/ide/ide-dma.c                          |   20 +
 drivers/ide/ide-floppy.c                       | 1438 +++++++++---------------
 drivers/ide/ide-generic.c                      |    2 +-
 drivers/ide/ide-iops.c                         |  109 +--
 drivers/ide/ide-pnp.c                          |    9 +-
 drivers/ide/ide-probe.c                        |  278 ++++--
 drivers/ide/ide-proc.c                         |    7 +-
 drivers/ide/ide-tape.c                         | 1240 ++++-----------------
 drivers/ide/ide-taskfile.c                     |   11 +-
 drivers/ide/ide.c                              |   77 +-
 drivers/ide/legacy/ali14xx.c                   |   24 +-
 drivers/ide/legacy/buddha.c                    |    2 +-
 drivers/ide/legacy/dtc2278.c                   |   36 +-
 drivers/ide/legacy/falconide.c                 |    2 +-
 drivers/ide/legacy/gayle.c                     |    2 +-
 drivers/ide/legacy/ht6560b.c                   |   48 +-
 drivers/ide/legacy/ide-cs.c                    |   29 +-
 drivers/ide/legacy/ide_platform.c              |    4 +-
 drivers/ide/legacy/macide.c                    |   12 +-
 drivers/ide/legacy/q40ide.c                    |    2 +-
 drivers/ide/legacy/qd65xx.c                    |   67 +-
 drivers/ide/legacy/umc8672.c                   |   24 +-
 drivers/ide/mips/au1xxx-ide.c                  |   37 +-
 drivers/ide/mips/swarm.c                       |    2 +-
 drivers/ide/pci/aec62xx.c                      |   26 +-
 drivers/ide/pci/alim15x3.c                     |    6 +-
 drivers/ide/pci/amd74xx.c                      |   21 +-
 drivers/ide/pci/atiixp.c                       |   30 +-
 drivers/ide/pci/cmd640.c                       |   33 +-
 drivers/ide/pci/cmd64x.c                       |    6 +-
 drivers/ide/pci/cs5520.c                       |   12 +-
 drivers/ide/pci/cs5530.c                       |    8 +-
 drivers/ide/pci/cs5535.c                       |   10 +-
 drivers/ide/pci/cy82c693.c                     |    1 -
 drivers/ide/pci/delkin_cb.c                    |   41 +-
 drivers/ide/pci/generic.c                      |    7 -
 drivers/ide/pci/hpt34x.c                       |    7 -
 drivers/ide/pci/hpt366.c                       |   89 +-
 drivers/ide/pci/it8213.c                       |   24 +-
 drivers/ide/pci/it821x.c                       |    8 +-
 drivers/ide/pci/jmicron.c                      |    9 +-
 drivers/ide/pci/ns87415.c                      |    4 -
 drivers/ide/pci/opti621.c                      |   15 +-
 drivers/ide/pci/pdc202xx_new.c                 |   14 +-
 drivers/ide/pci/pdc202xx_old.c                 |   17 +-
 drivers/ide/pci/piix.c                         |    9 +-
 drivers/ide/pci/rz1000.c                       |   10 +-
 drivers/ide/pci/sc1200.c                       |    8 +-
 drivers/ide/pci/scc_pata.c                     |   10 +-
 drivers/ide/pci/serverworks.c                  |   11 +-
 drivers/ide/pci/sgiioc4.c                      |   20 +-
 drivers/ide/pci/siimage.c                      |   31 +-
 drivers/ide/pci/sis5513.c                      |   14 +-
 drivers/ide/pci/sl82c105.c                     |    6 -
 drivers/ide/pci/slc90e66.c                     |   26 +-
 drivers/ide/pci/tc86c001.c                     |   24 +-
 drivers/ide/pci/triflex.c                      |    5 -
 drivers/ide/pci/trm290.c                       |    7 +-
 drivers/ide/pci/via82cxxx.c                    |   10 +-
 drivers/ide/ppc/mpc8xx.c                       |    2 +-
 drivers/ide/ppc/pmac.c                         |   84 +-
 drivers/ide/setup-pci.c                        |   77 +-
 drivers/macintosh/mediabay.c                   |    2 +-
 drivers/scsi/ide-scsi.c                        |    9 +-
 include/linux/hdreg.h                          |    4 +-
 include/linux/ide.h                            |   51 +-
 77 files changed, 1989 insertions(+), 2849 deletions(-)
 create mode 100644 Documentation/ide/ChangeLog.ide-tape.1995-2002
 create mode 100644 Documentation/ide/ide-tape.txt


Alan Cox (1):
      pdc202xx_old: remove surplus initialiser

Bartlomiej Zolnierkiewicz (50):
      dtc2278: fix ->io_32bit handling
      au1xxx-ide: fix ->io_32bit handling
      atiixp/cs5535/scc_pata: fix "idex=ata66" parameter handling
      macide: remove drive->capacity64 quirk
      ide: always set DMA masks in ide_pci_setup_ports()
      ide: separate PCI specific init from generic init in ide_pci_setup_ports()
      ide: add struct ide_port_info instances to legacy host drivers
      ide: add ->cable_detect method to ide_hwif_t
      ide: remove needless includes from PCI host drivers
      ide: remove redundant hwif->present check from ide_register_hw()
      ide: remove redundant init_hwif_default() call from ide_register_hw()
      ide: add 'init_default' and 'restore' arguments to ide_unregister()
      ide: add ide_deprecated_find_port() helper
      ide: fix ide_unregister() usage in host drivers
      ide: factor out code initializing devices from ide_init_port()
      ide: add IDE_HFLAG_NO_{IO32_BIT,UNMASK_IRQS} host flags
      ide: add ->port_init_devs method to ide_hwif_t
      ide: remove incorrect init_gendisk() comment
      ide: skip not present devices in init_gendisk()
      ide: move blk_register_region() call out from init_gendisk()
      ide: call init_gendisk() after ide_acpi_init()
      ide: merge init_gendisk() into hwif_register_devices()
      ide: move hwif->rqsize init from ide_init_queue() to init_irq()
      ide: factor out adding drive to hwgroup from init_irq()
      ide: factor out devices setup from init_irq()
      ide: move ide_acpi_init() call to ide_device_add_all()
      ide-acpi: remove needless exports
      ide-acpi: remove dead code from do_drive_get_GTF()
      ide: factor out devices setup from ide_acpi_init()
      ide: move hwif->present check out from ide_proc_register_port()
      ide: move create_proc_ide_drives() call to ide_device_add_all()
      ide-tape: use ide_execute_command()
      ide-scsi: use ide_execute_command()
      trm290: use ide_execute_command()
      ide-cris: use ide_execute_command()
      ide-probe: remove needless Status register reads
      ide: remove unused ->auto_poll field from ide_hwif_t
      ide: convert ->straight8 field in ide_hwif_t to bit flag
      ide: remove ->nice0 and ->nice2 fields from ide_drive_t
      ide: remove SATA_*_REG macros
      ide: use __ide_set_handler() in ide_execute_command()
      ide-scsi: remove needless SELECT_DRIVE() call
      ide: unexport SELECT_DRIVE()
      ide: remove set_transfer()
      ide: remove ide_ata66_check()
      ide: move drive->crc_count check out from check_dma_crc()
      ide: remove ide_auto_reduce_xfer()
      ide: move check_dma_crc() to ide-dma.c
      ide-cs: use ide_std_init_ports()
      ide-tape: dump gcw fields on error in idetape_identify_device()

Borislav Petkov (44):
      ide-floppy: convert to generic packet commands
      ide-floppy: replace ntoh{s,l} and hton{s,l} calls with the generic byteorder
      ide-floppy: remove unnecessary ->handler != NULL check
      ide-floppy: disambiguate function names
      ide-floppy: include the proper headers
      ide-floppy: cleanup and unify debugging macro calls
      ide-floppy: remove struct idefloppy_capabilities_page
      ide-floppy: remove struct idefloppy_inquiry_result
      ide-floppy: remove struct idefloppy_request_sense_result
      ide-floppy: remove struct idefloppy_mode_parameter_header
      ide-floppy: remove struct idefloppy_flexible_disk_page
      ide-floppy: remove struct idefloppy_capacity_descriptor
      ide-floppy: factor out ioctl handlers from idefloppy_ioctl()
      ide-floppy: report DMA handling in idefloppy_pc_intr() properly
      ide-floppy: mv idefloppy_{should_,}report_error
      ide-floppy: remove IDEFLOPPY_DEBUG_BUGS macro
      ide-floppy: use an xfer_func_t and io_buf_t typedefs in order to unify rw
      ide-floppy: merge idefloppy_{input,output}_buffers
      ide-floppy: remove unused IDEFLOPPY_USE_READ12
      ide-floppy: remove IDEFLOPPY_DEBUG_INFO
      ide-floppy: remove unused flag PC_ABORT
      ide-floppy: remove atomic test_*bit macros
      ide-floppy: fix most of the remaining checkpatch.pl issues
      ide-floppy: bump driver version number
      ide-tape: move historical changelog to Documentation/ide/ChangeLog.ide-tape.1995-2002
      ide-tape: remove dead code
      ide-tape: remove struct idetape_request_sense_result_t
      ide-tape: remove struct idetape_mode_parameter_header_t
      ide-tape: remove IDETAPE_DEBUG_INFO
      ide-tape: remove IDETAPE_DEBUG_BUGS
      ide-tape: remove struct idetape_capabilities_page_t
      ide-tape: remove struct idetape_inquiry_result_t
      ide-tape: remove struct idetape_data_compression_page_t
      ide-tape: remove struct idetape_medium_partition_page_t
      ide-tape: remove struct idetape_parameter_block_descriptor_t
      ide-tape: remove structs os_partition_t, os_dat_entry_t, os_dat_t
      ide-tape: remove struct idetape_block_size_page_t
      ide-tape: use generic scsi commands
      ide-tape: remove EXPERIMENTAL driver status
      ide-tape: use generic byteorder macros
      ide-tape: remove unused sense packet commands.
      ide-tape: make function name more accurate
      ide-tape: remove mtio.h related comments
      ide-tape: remove idetape_config_t typedef


diff --git a/Documentation/ide/ChangeLog.ide-tape.1995-2002 b/Documentation/ide/ChangeLog.ide-tape.1995-2002
new file mode 100644
index 0000000..877fac8
--- /dev/null
+++ b/Documentation/ide/ChangeLog.ide-tape.1995-2002
@@ -0,0 +1,257 @@
+/*
+ * Ver 0.1   Nov  1 95   Pre-working code :-)
+ * Ver 0.2   Nov 23 95   A short backup (few megabytes) and restore procedure
+ *                        was successful ! (Using tar cvf ... on the block
+ *                        device interface).
+ *                       A longer backup resulted in major swapping, bad
+ *                        overall Linux performance and eventually failed as
+ *                        we received non serial read-ahead requests from the
+ *                        buffer cache.
+ * Ver 0.3   Nov 28 95   Long backups are now possible, thanks to the
+ *                        character device interface. Linux's responsiveness
+ *                        and performance doesn't seem to be much affected
+ *                        from the background backup procedure.
+ *                       Some general mtio.h magnetic tape operations are
+ *                        now supported by our character device. As a result,
+ *                        popular tape utilities are starting to work with
+ *                        ide tapes :-)
+ *                       The following configurations were tested:
+ *                       1. An IDE ATAPI TAPE shares the same interface
+ *                        and irq with an IDE ATAPI CDROM.
+ *                       2. An IDE ATAPI TAPE shares the same interface
+ *                        and irq with a normal IDE disk.
+ *                        Both configurations seemed to work just fine !
+ *                        However, to be on the safe side, it is meanwhile
+ *                        recommended to give the IDE TAPE its own interface
+ *                        and irq.
+ *                       The one thing which needs to be done here is to
+ *                        add a "request postpone" feature to ide.c,
+ *                        so that we won't have to wait for the tape to finish
+ *                        performing a long media access (DSC) request (such
+ *                        as a rewind) before we can access the other device
+ *                        on the same interface. This effect doesn't disturb
+ *                        normal operation most of the time because read/write
+ *                        requests are relatively fast, and once we are
+ *                        performing one tape r/w request, a lot of requests
+ *                        from the other device can be queued and ide.c will
+ *			  service all of them after this single tape request.
+ * Ver 1.0   Dec 11 95   Integrated into Linux 1.3.46 development tree.
+ *                       On each read / write request, we now ask the drive
+ *                        if we can transfer a constant number of bytes
+ *                        (a parameter of the drive) only to its buffers,
+ *                        without causing actual media access. If we can't,
+ *                        we just wait until we can by polling the DSC bit.
+ *                        This ensures that while we are not transferring
+ *                        more bytes than the constant referred to above, the
+ *                        interrupt latency will not become too high and
+ *                        we won't cause an interrupt timeout, as happened
+ *                        occasionally in the previous version.
+ *                       While polling for DSC, the current request is
+ *                        postponed and ide.c is free to handle requests from
+ *                        the other device. This is handled transparently to
+ *                        ide.c. The hwgroup locking method which was used
+ *                        in the previous version was removed.
+ *                       Use of new general features which are provided by
+ *                        ide.c for use with atapi devices.
+ *                        (Programming done by Mark Lord)
+ *                       Few potential bug fixes (Again, suggested by Mark)
+ *                       Single character device data transfers are now
+ *                        not limited in size, as they were before.
+ *                       We are asking the tape about its recommended
+ *                        transfer unit and send a larger data transfer
+ *                        as several transfers of the above size.
+ *                        For best results, use an integral number of this
+ *                        basic unit (which is shown during driver
+ *                        initialization). I will soon add an ioctl to get
+ *                        this important parameter.
+ *                       Our data transfer buffer is allocated on startup,
+ *                        rather than before each data transfer. This should
+ *                        ensure that we will indeed have a data buffer.
+ * Ver 1.1   Dec 14 95   Fixed random problems which occurred when the tape
+ *                        shared an interface with another device.
+ *                        (poll_for_dsc was a complete mess).
+ *                       Removed some old (non-active) code which had
+ *                        to do with supporting buffer cache originated
+ *                        requests.
+ *                       The block device interface can now be opened, so
+ *                        that general ide driver features like the unmask
+ *                        interrupts flag can be selected with an ioctl.
+ *                        This is the only use of the block device interface.
+ *                       New fast pipelined operation mode (currently only on
+ *                        writes). When using the pipelined mode, the
+ *                        throughput can potentially reach the maximum
+ *                        tape supported throughput, regardless of the
+ *                        user backup program. On my tape drive, it sometimes
+ *                        boosted performance by a factor of 2. Pipelined
+ *                        mode is enabled by default, but since it has a few
+ *                        downfalls as well, you may want to disable it.
+ *                        A short explanation of the pipelined operation mode
+ *                        is available below.
+ * Ver 1.2   Jan  1 96   Eliminated pipelined mode race condition.
+ *                       Added pipeline read mode. As a result, restores
+ *                        are now as fast as backups.
+ *                       Optimized shared interface behavior. The new behavior
+ *                        typically results in better IDE bus efficiency and
+ *                        higher tape throughput.
+ *                       Pre-calculation of the expected read/write request
+ *                        service time, based on the tape's parameters. In
+ *                        the pipelined operation mode, this allows us to
+ *                        adjust our polling frequency to a much lower value,
+ *                        and thus to dramatically reduce our load on Linux,
+ *                        without any decrease in performance.
+ *                       Implemented additional mtio.h operations.
+ *                       The recommended user block size is returned by
+ *                        the MTIOCGET ioctl.
+ *                       Additional minor changes.
+ * Ver 1.3   Feb  9 96   Fixed pipelined read mode bug which prevented the
+ *                        use of some block sizes during a restore procedure.
+ *                       The character device interface will now present a
+ *                        continuous view of the media - any mix of block sizes
+ *                        during a backup/restore procedure is supported. The
+ *                        driver will buffer the requests internally and
+ *                        convert them to the tape's recommended transfer
+ *                        unit, making performance almost independent of the
+ *                        chosen user block size.
+ *                       Some improvements in error recovery.
+ *                       By cooperating with ide-dma.c, bus mastering DMA can
+ *                        now sometimes be used with IDE tape drives as well.
+ *                        Bus mastering DMA has the potential to dramatically
+ *                        reduce the CPU's overhead when accessing the device,
+ *                        and can be enabled by using hdparm -d1 on the tape's
+ *                        block device interface. For more info, read the
+ *                        comments in ide-dma.c.
+ * Ver 1.4   Mar 13 96   Fixed serialize support.
+ * Ver 1.5   Apr 12 96   Fixed shared interface operation, broken in 1.3.85.
+ *                       Fixed pipelined read mode inefficiency.
+ *                       Fixed nasty null dereferencing bug.
+ * Ver 1.6   Aug 16 96   Fixed FPU usage in the driver.
+ *                       Fixed end of media bug.
+ * Ver 1.7   Sep 10 96   Minor changes for the CONNER CTT8000-A model.
+ * Ver 1.8   Sep 26 96   Attempt to find a better balance between good
+ *                        interactive response and high system throughput.
+ * Ver 1.9   Nov  5 96   Automatically cross encountered filemarks rather
+ *                        than requiring an explicit FSF command.
+ *                       Abort pending requests at end of media.
+ *                       MTTELL was sometimes returning incorrect results.
+ *                       Return the real block size in the MTIOCGET ioctl.
+ *                       Some error recovery bug fixes.
+ * Ver 1.10  Nov  5 96   Major reorganization.
+ *                       Reduced CPU overhead a bit by eliminating internal
+ *                        bounce buffers.
+ *                       Added module support.
+ *                       Added multiple tape drives support.
+ *                       Added partition support.
+ *                       Rewrote DSC handling.
+ *                       Some portability fixes.
+ *                       Removed ide-tape.h.
+ *                       Additional minor changes.
+ * Ver 1.11  Dec  2 96   Bug fix in previous DSC timeout handling.
+ *                       Use ide_stall_queue() for DSC overlap.
+ *                       Use the maximum speed rather than the current speed
+ *                        to compute the request service time.
+ * Ver 1.12  Dec  7 97   Fix random memory overwriting and/or last block data
+ *                        corruption, which could occur if the total number
+ *                        of bytes written to the tape was not an integral
+ *                        number of tape blocks.
+ *                       Add support for INTERRUPT DRQ devices.
+ * Ver 1.13  Jan  2 98   Add "speed == 0" work-around for HP COLORADO 5GB
+ * Ver 1.14  Dec 30 98   Partial fixes for the Sony/AIWA tape drives.
+ *                       Replace cli()/sti() with hwgroup spinlocks.
+ * Ver 1.15  Mar 25 99   Fix SMP race condition by replacing hwgroup
+ *                        spinlock with private per-tape spinlock.
+ * Ver 1.16  Sep  1 99   Add OnStream tape support.
+ *                       Abort read pipeline on EOD.
+ *                       Wait for the tape to become ready in case it returns
+ *                        "in the process of becoming ready" on open().
+ *                       Fix zero padding of the last written block in
+ *                        case the tape block size is larger than PAGE_SIZE.
+ *                       Decrease the default disconnection time to tn.
+ * Ver 1.16e Oct  3 99   Minor fixes.
+ * Ver 1.16e1 Oct 13 99  Patches by Arnold Niessen,
+ *                          niessen@iae.nl / arnold.niessen@philips.com
+ *                   GO-1)  Undefined code in idetape_read_position
+ *				according to Gadi's email
+ *                   AJN-1) Minor fix asc == 11 should be asc == 0x11
+ *                               in idetape_issue_packet_command (did effect
+ *                               debugging output only)
+ *                   AJN-2) Added more debugging output, and
+ *                              added ide-tape: where missing. I would also
+ *				like to add tape->name where possible
+ *                   AJN-3) Added different debug_level's
+ *                              via /proc/ide/hdc/settings
+ *				"debug_level" determines amount of debugging output;
+ *				can be changed using /proc/ide/hdx/settings
+ *				0 : almost no debugging output
+ *				1 : 0+output errors only
+ *				2 : 1+output all sensekey/asc
+ *				3 : 2+follow all chrdev related procedures
+ *				4 : 3+follow all procedures
+ *				5 : 4+include pc_stack rq_stack info
+ *				6 : 5+USE_COUNT updates
+ *                   AJN-4) Fixed timeout for retension in idetape_queue_pc_tail
+ *				from 5 to 10 minutes
+ *                   AJN-5) Changed maximum number of blocks to skip when
+ *                              reading tapes with multiple consecutive write
+ *                              errors from 100 to 1000 in idetape_get_logical_blk
+ *                   Proposed changes to code:
+ *                   1) output "logical_blk_num" via /proc
+ *                   2) output "current_operation" via /proc
+ *                   3) Either solve or document the fact that `mt rewind' is
+ *                      required after reading from /dev/nhtx to be
+ *			able to rmmod the idetape module;
+ *			Also, sometimes an application finishes but the
+ *			device remains `busy' for some time. Same cause ?
+ *                   Proposed changes to release-notes:
+ *		     4) write a simple `quickstart' section in the
+ *                      release notes; I volunteer if you don't want to
+ *		     5) include a pointer to video4linux in the doc
+ *                      to stimulate video applications
+ *                   6) release notes lines 331 and 362: explain what happens
+ *			if the application data rate is higher than 1100 KB/s;
+ *			similar approach to lower-than-500 kB/s ?
+ *		     7) 6.6 Comparison; wouldn't it be better to allow different
+ *			strategies for read and write ?
+ *			Wouldn't it be better to control the tape buffer
+ *			contents instead of the bandwidth ?
+ *		     8) line 536: replace will by would (if I understand
+ *			this section correctly, a hypothetical and unwanted situation
+ *			 is being described)
+ * Ver 1.16f Dec 15 99   Change place of the secondary OnStream header frames.
+ * Ver 1.17  Nov 2000 / Jan 2001  Marcel Mol, marcel@mesa.nl
+ *			- Add idetape_onstream_mode_sense_tape_parameter_page
+ *			  function to get tape capacity in frames: tape->capacity.
+ *			- Add support for DI-50 drives( or any DI- drive).
+ *			- 'workaround' for read error/blank block around block 3000.
+ *			- Implement Early warning for end of media for Onstream.
+ *			- Cosmetic code changes for readability.
+ *			- Idetape_position_tape should not use SKIP bit during
+ *			  Onstream read recovery.
+ *			- Add capacity, logical_blk_num and first/last_frame_position
+ *			  to /proc/ide/hd?/settings.
+ *			- Module use count was gone in the Linux 2.4 driver.
+ * Ver 1.17a Apr 2001 Willem Riede osst@riede.org
+ *			- Get drive's actual block size from mode sense block descriptor
+ *			- Limit size of pipeline
+ * Ver 1.17b Oct 2002   Alan Stern <stern@rowland.harvard.edu>
+ *			Changed IDETAPE_MIN_PIPELINE_STAGES to 1 and actually used
+ *			 it in the code!
+ *			Actually removed aborted stages in idetape_abort_pipeline
+ *			 instead of just changing the command code.
+ *			Made the transfer byte count for Request Sense equal to the
+ *			 actual length of the data transfer.
+ *			Changed handling of partial data transfers: they do not
+ *			 cause DMA errors.
+ *			Moved initiation of DMA transfers to the correct place.
+ *			Removed reference to unallocated memory.
+ *			Made __idetape_discard_read_pipeline return the number of
+ *			 sectors skipped, not the number of stages.
+ *			Replaced errant kfree() calls with __idetape_kfree_stage().
+ *			Fixed off-by-one error in testing the pipeline length.
+ *			Fixed handling of filemarks in the read pipeline.
+ *			Small code optimization for MTBSF and MTBSFM ioctls.
+ *			Don't try to unlock the door during device close if is
+ *			 already unlocked!
+ *			Cosmetic fixes to miscellaneous debugging output messages.
+ *			Set the minimum /proc/ide/hd?/settings values for "pipeline",
+ *			 "pipeline_min", and "pipeline_max" to 1.
+ */
diff --git a/Documentation/ide/ide-tape.txt b/Documentation/ide/ide-tape.txt
new file mode 100644
index 0000000..658f271
--- /dev/null
+++ b/Documentation/ide/ide-tape.txt
@@ -0,0 +1,146 @@
+/*
+ * IDE ATAPI streaming tape driver.
+ *
+ * This driver is a part of the Linux ide driver.
+ *
+ * The driver, in co-operation with ide.c, basically traverses the
+ * request-list for the block device interface. The character device
+ * interface, on the other hand, creates new requests, adds them
+ * to the request-list of the block device, and waits for their completion.
+ *
+ * Pipelined operation mode is now supported on both reads and writes.
+ *
+ * The block device major and minor numbers are determined from the
+ * tape's relative position in the ide interfaces, as explained in ide.c.
+ *
+ * The character device interface consists of the following devices:
+ *
+ * ht0		major 37, minor 0	first  IDE tape, rewind on close.
+ * ht1		major 37, minor 1	second IDE tape, rewind on close.
+ * ...
+ * nht0		major 37, minor 128	first  IDE tape, no rewind on close.
+ * nht1		major 37, minor 129	second IDE tape, no rewind on close.
+ * ...
+ *
+ * The general magnetic tape commands compatible interface, as defined by
+ * include/linux/mtio.h, is accessible through the character device.
+ *
+ * General ide driver configuration options, such as the interrupt-unmask
+ * flag, can be configured by issuing an ioctl to the block device interface,
+ * as any other ide device.
+ *
+ * Our own ide-tape ioctl's can be issued to either the block device or
+ * the character device interface.
+ *
+ * Maximal throughput with minimal bus load will usually be achieved in the
+ * following scenario:
+ *
+ *	1.	ide-tape is operating in the pipelined operation mode.
+ *	2.	No buffering is performed by the user backup program.
+ *
+ * Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
+ *
+ * Here are some words from the first releases of hd.c, which are quoted
+ * in ide.c and apply here as well:
+ *
+ * | Special care is recommended.  Have Fun!
+ *
+ *
+ * An overview of the pipelined operation mode.
+ *
+ * In the pipelined write mode, we will usually just add requests to our
+ * pipeline and return immediately, before we even start to service them. The
+ * user program will then have enough time to prepare the next request while
+ * we are still busy servicing previous requests. In the pipelined read mode,
+ * the situation is similar - we add read-ahead requests into the pipeline,
+ * before the user even requested them.
+ *
+ * The pipeline can be viewed as a "safety net" which will be activated when
+ * the system load is high and prevents the user backup program from keeping up
+ * with the current tape speed. At this point, the pipeline will get
+ * shorter and shorter but the tape will still be streaming at the same speed.
+ * Assuming we have enough pipeline stages, the system load will hopefully
+ * decrease before the pipeline is completely empty, and the backup program
+ * will be able to "catch up" and refill the pipeline again.
+ *
+ * When using the pipelined mode, it would be best to disable any type of
+ * buffering done by the user program, as ide-tape already provides all the
+ * benefits in the kernel, where it can be done in a more efficient way.
+ * As we will usually not block the user program on a request, the most
+ * efficient user code will then be a simple read-write-read-... cycle.
+ * Any additional logic will usually just slow down the backup process.
+ *
+ * Using the pipelined mode, I get a constant over 400 KBps throughput,
+ * which seems to be the maximum throughput supported by my tape.
+ *
+ * However, there are some downfalls:
+ *
+ *	1.	We use memory (for data buffers) in proportional to the number
+ *		of pipeline stages (each stage is about 26 KB with my tape).
+ *	2.	In the pipelined write mode, we cheat and postpone error codes
+ *		to the user task. In read mode, the actual tape position
+ *		will be a bit further than the last requested block.
+ *
+ * Concerning (1):
+ *
+ *	1.	We allocate stages dynamically only when we need them. When
+ *		we don't need them, we don't consume additional memory. In
+ *		case we can't allocate stages, we just manage without them
+ *		(at the expense of decreased throughput) so when Linux is
+ *		tight in memory, we will not pose additional difficulties.
+ *
+ *	2.	The maximum number of stages (which is, in fact, the maximum
+ *		amount of memory) which we allocate is limited by the compile
+ *		time parameter IDETAPE_MAX_PIPELINE_STAGES.
+ *
+ *	3.	The maximum number of stages is a controlled parameter - We
+ *		don't start from the user defined maximum number of stages
+ *		but from the lower IDETAPE_MIN_PIPELINE_STAGES (again, we
+ *		will not even allocate this amount of stages if the user
+ *		program can't handle the speed). We then implement a feedback
+ *		loop which checks if the pipeline is empty, and if it is, we
+ *		increase the maximum number of stages as necessary until we
+ *		reach the optimum value which just manages to keep the tape
+ *		busy with minimum allocated memory or until we reach
+ *		IDETAPE_MAX_PIPELINE_STAGES.
+ *
+ * Concerning (2):
+ *
+ *	In pipelined write mode, ide-tape can not return accurate error codes
+ *	to the user program since we usually just add the request to the
+ *      pipeline without waiting for it to be serviced. In case an error
+ *      occurs, I will report it on the next user request.
+ *
+ *	In the pipelined read mode, subsequent read requests or forward
+ *	filemark spacing will perform correctly, as we preserve all blocks
+ *	and filemarks which we encountered during our excess read-ahead.
+ *
+ *	For accurate tape positioning and error reporting, disabling
+ *	pipelined mode might be the best option.
+ *
+ * You can enable/disable/tune the pipelined operation mode by adjusting
+ * the compile time parameters below.
+ *
+ *
+ *	Possible improvements.
+ *
+ *	1.	Support for the ATAPI overlap protocol.
+ *
+ *		In order to maximize bus throughput, we currently use the DSC
+ *		overlap method which enables ide.c to service requests from the
+ *		other device while the tape is busy executing a command. The
+ *		DSC overlap method involves polling the tape's status register
+ *		for the DSC bit, and servicing the other device while the tape
+ *		isn't ready.
+ *
+ *		In the current QIC development standard (December 1995),
+ *		it is recommended that new tape drives will *in addition*
+ *		implement the ATAPI overlap protocol, which is used for the
+ *		same purpose - efficient use of the IDE bus, but is interrupt
+ *		driven and thus has much less CPU overhead.
+ *
+ *		ATAPI overlap is likely to be supported in most new ATAPI
+ *		devices, including new ATAPI cdroms, and thus provides us
+ *		a method by which we can achieve higher throughput when
+ *		sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
+ */
diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index e42a465..45b26ed 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -216,8 +216,7 @@ config BLK_DEV_IDECD_VERBOSE_ERRORS
 	  memory, though.
 
 config BLK_DEV_IDETAPE
-	tristate "Include IDE/ATAPI TAPE support (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
+	tristate "Include IDE/ATAPI TAPE support"
 	help
 	  If you have an IDE tape drive using the ATAPI protocol, say Y.
 	  ATAPI is a newer protocol used by IDE tape and CD-ROM drives,
diff --git a/drivers/ide/arm/bast-ide.c b/drivers/ide/arm/bast-ide.c
index 037300f..0e7574c 100644
--- a/drivers/ide/arm/bast-ide.c
+++ b/drivers/ide/arm/bast-ide.c
@@ -28,8 +28,10 @@ static int __init
 bastide_register(unsigned int base, unsigned int aux, int irq,
 		 ide_hwif_t **hwif)
 {
+	ide_hwif_t *hwif;
 	hw_regs_t hw;
 	int i;
+	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 
 	memset(&hw, 0, sizeof(hw));
 
@@ -44,8 +46,24 @@ bastide_register(unsigned int base, unsigned int aux, int irq,
 	hw.io_ports[IDE_CONTROL_OFFSET] = aux + (6 * 0x20);
 	hw.irq = irq;
 
-	ide_register_hw(&hw, NULL, hwif);
+	hwif = ide_deprecated_find_port(hw.io_ports[IDE_DATA_OFFSET]);
+	if (hwif == NULL)
+		goto out;
 
+	i = hwif->index;
+
+	if (hwif->present)
+		ide_unregister(i, 0, 0);
+	else if (!hwif->hold)
+		ide_init_port_data(hwif, i);
+
+	ide_init_port_hw(hwif, &hw);
+	hwif->quirkproc = NULL;
+
+	idx[0] = i;
+
+	ide_device_add(idx, NULL);
+out:
 	return 0;
 }
 
diff --git a/drivers/ide/arm/icside.c b/drivers/ide/arm/icside.c
index 8d2cc47..fb00f38 100644
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -377,9 +377,6 @@ static void icside_dma_lost_irq(ide_drive_t *drive)
 
 static void icside_dma_init(ide_hwif_t *hwif)
 {
-	hwif->mwdma_mask	= 7; /* MW0..2 */
-	hwif->swdma_mask	= 7; /* SW0..2 */
-
 	hwif->dmatable_cpu	= NULL;
 	hwif->dmatable_dma	= 0;
 	hwif->set_dma_mode	= icside_set_dma_mode;
@@ -459,11 +456,19 @@ icside_register_v5(struct icside_state *state, struct expansion_card *ec)
 
 	idx[0] = hwif->index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, NULL);
 
 	return 0;
 }
 
+static const struct ide_port_info icside_v6_port_info __initdata = {
+	.host_flags		= IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA | /* no SFF-style DMA */
+				  IDE_HFLAG_NO_AUTOTUNE,
+	.mwdma_mask		= ATA_MWDMA2,
+	.swdma_mask		= ATA_SWDMA2,
+};
+
 static int __init
 icside_register_v6(struct icside_state *state, struct expansion_card *ec)
 {
@@ -472,6 +477,7 @@ icside_register_v6(struct icside_state *state, struct expansion_card *ec)
 	unsigned int sel = 0;
 	int ret;
 	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+	struct ide_port_info d = icside_v6_port_info;
 
 	ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
 	if (!ioc_base) {
@@ -521,30 +527,25 @@ icside_register_v6(struct icside_state *state, struct expansion_card *ec)
 	state->hwif[1]    = mate;
 
 	hwif->maskproc    = icside_maskproc;
-	hwif->channel     = 0;
 	hwif->hwif_data   = state;
-	hwif->mate        = mate;
-	hwif->serialized  = 1;
 	hwif->config_data = (unsigned long)ioc_base;
 	hwif->select_data = sel;
 
 	mate->maskproc    = icside_maskproc;
-	mate->channel     = 1;
 	mate->hwif_data   = state;
-	mate->mate        = hwif;
-	mate->serialized  = 1;
 	mate->config_data = (unsigned long)ioc_base;
 	mate->select_data = sel | 1;
 
 	if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
 		icside_dma_init(hwif);
 		icside_dma_init(mate);
-	}
+	} else
+		d.mwdma_mask = d.swdma_mask = 0;
 
 	idx[0] = hwif->index;
 	idx[1] = mate->index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, &d);
 
 	return 0;
 
diff --git a/drivers/ide/arm/ide_arm.c b/drivers/ide/arm/ide_arm.c
index 60f2497..43a70e9 100644
--- a/drivers/ide/arm/ide_arm.c
+++ b/drivers/ide/arm/ide_arm.c
@@ -39,7 +39,7 @@ static int __init ide_arm_init(void)
 		ide_init_port_hw(hwif, &hw);
 		idx[0] = hwif->index;
 
-		ide_device_add(idx);
+		ide_device_add(idx, NULL);
 	}
 
 	return 0;
diff --git a/drivers/ide/arm/rapide.c b/drivers/ide/arm/rapide.c
index c8b6581..efba00d 100644
--- a/drivers/ide/arm/rapide.c
+++ b/drivers/ide/arm/rapide.c
@@ -58,7 +58,7 @@ rapide_probe(struct expansion_card *ec, const struct ecard_id *id)
 
 		idx[0] = hwif->index;
 
-		ide_device_add(idx);
+		ide_device_add(idx, NULL);
 
 		ecard_set_drvdata(ec, hwif);
 		goto out;
@@ -76,7 +76,7 @@ static void __devexit rapide_remove(struct expansion_card *ec)
 
 	ecard_set_drvdata(ec, NULL);
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif->index, 0, 0);
 
 	ecard_release_resources(ec);
 }
diff --git a/drivers/ide/cris/ide-cris.c b/drivers/ide/cris/ide-cris.c
index 0640a38..00587a8 100644
--- a/drivers/ide/cris/ide-cris.c
+++ b/drivers/ide/cris/ide-cris.c
@@ -753,6 +753,15 @@ static void cris_set_dma_mode(ide_drive_t *drive, const u8 speed)
 		cris_ide_set_speed(TYPE_DMA, 0, strobe, hold);
 }
 
+static const struct ide_port_info cris_port_info __initdata = {
+	.chipset		= ide_etrax100,
+	.host_flags		= IDE_HFLAG_NO_ATAPI_DMA |
+				  IDE_HFLAG_NO_DMA, /* no SFF-style DMA */
+	.pio_mask		= ATA_PIO4,
+	.udma_mask		= cris_ultra_mask,
+	.mwdma_mask		= ATA_MWDMA2,
+};
+
 static int __init init_e100_ide(void)
 {
 	hw_regs_t hw;
@@ -780,7 +789,6 @@ static int __init init_e100_ide(void)
 		ide_init_port_data(hwif, hwif->index);
 		ide_init_port_hw(hwif, &hw);
 		hwif->mmio = 1;
-		hwif->chipset = ide_etrax100;
 		hwif->set_pio_mode = &cris_set_pio_mode;
 		hwif->set_dma_mode = &cris_set_dma_mode;
 		hwif->ata_input_data = &cris_ide_input_data;
@@ -799,12 +807,6 @@ static int __init init_e100_ide(void)
 		hwif->INB = &cris_ide_inb;
 		hwif->INW = &cris_ide_inw;
 		hwif->cbl = ATA_CBL_PATA40;
-		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
-		hwif->pio_mask = ATA_PIO4,
-		hwif->drives[0].autotune = 1;
-		hwif->drives[1].autotune = 1;
-		hwif->ultra_mask = cris_ultra_mask;
-		hwif->mwdma_mask = 0x07; /* Multiword DMA 0-2 */
 
 		idx[h] = hwif->index;
 	}
@@ -820,7 +822,7 @@ static int __init init_e100_ide(void)
 	cris_ide_set_speed(TYPE_DMA, 0, ATA_DMA2_STROBE, ATA_DMA2_HOLD);
 	cris_ide_set_speed(TYPE_UDMA, ATA_UDMA2_CYC, ATA_UDMA2_DVS, 0);
 
-	ide_device_add(idx);
+	ide_device_add(idx, &cris_port_info);
 
 	return 0;
 }
@@ -1032,11 +1034,7 @@ static int cris_dma_setup(ide_drive_t *drive)
 
 static void cris_dma_exec_cmd(ide_drive_t *drive, u8 command)
 {
-	/* set the irq handler which will finish the request when DMA is done */
-	ide_set_handler(drive, &cris_dma_intr, WAIT_CMD, NULL);
-
-	/* issue cmd to drive */
-	cris_ide_outb(command, IDE_COMMAND_REG);
+	ide_execute_command(drive, command, &cris_dma_intr, WAIT_CMD, NULL);
 }
 
 static void cris_dma_start(ide_drive_t *drive)
diff --git a/drivers/ide/h8300/ide-h8300.c b/drivers/ide/h8300/ide-h8300.c
index 0243295..520aec0 100644
--- a/drivers/ide/h8300/ide-h8300.c
+++ b/drivers/ide/h8300/ide-h8300.c
@@ -114,7 +114,7 @@ static int __init h8300_ide_init(void)
 
 	idx[0] = index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, NULL);
 
 	return 0;
 
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c
index 68bc618..25aaeae 100644
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -39,7 +39,6 @@ struct GTM_buffer {
 };
 
 struct ide_acpi_drive_link {
-	ide_drive_t	*drive;
 	acpi_handle	 obj_handle;
 	u8		 idbuff[512];
 };
@@ -280,16 +279,6 @@ static int do_drive_get_GTF(ide_drive_t *drive,
 
 	port = hwif->channel ? drive->dn - 2: drive->dn;
 
-	if (!drive->acpidata) {
-		if (port == 0) {
-			drive->acpidata = &hwif->acpidata->master;
-			hwif->acpidata->master.drive = drive;
-		} else {
-			drive->acpidata = &hwif->acpidata->slave;
-			hwif->acpidata->slave.drive = drive;
-		}
-	}
-
 	DEBPRINT("ENTER: %s at %s, port#: %d, hard_port#: %d\n",
 		 hwif->name, dev->bus_id, port, hwif->channel);
 
@@ -494,7 +483,6 @@ int ide_acpi_exec_tfs(ide_drive_t *drive)
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(ide_acpi_exec_tfs);
 
 /**
  * ide_acpi_get_timing - get the channel (controller) timings
@@ -580,7 +568,6 @@ void ide_acpi_get_timing(ide_hwif_t *hwif)
 
 	kfree(output.pointer);
 }
-EXPORT_SYMBOL_GPL(ide_acpi_get_timing);
 
 /**
  * ide_acpi_push_timing - set the channel (controller) timings
@@ -634,7 +621,6 @@ void ide_acpi_push_timing(ide_hwif_t *hwif)
 	}
 	DEBPRINT("_STM status: %d\n", status);
 }
-EXPORT_SYMBOL_GPL(ide_acpi_push_timing);
 
 /**
  * ide_acpi_set_state - set the channel power state
@@ -688,11 +674,6 @@ void ide_acpi_set_state(ide_hwif_t *hwif, int on)
  */
 void ide_acpi_init(ide_hwif_t *hwif)
 {
-	int unit;
-	int			err;
-	struct ide_acpi_drive_link	*master;
-	struct ide_acpi_drive_link	*slave;
-
 	ide_acpi_blacklist();
 
 	hwif->acpidata = kzalloc(sizeof(struct ide_acpi_hwif_link), GFP_KERNEL);
@@ -704,40 +685,38 @@ void ide_acpi_init(ide_hwif_t *hwif)
 		DEBPRINT("no ACPI object for %s found\n", hwif->name);
 		kfree(hwif->acpidata);
 		hwif->acpidata = NULL;
-		return;
 	}
+}
+
+void ide_acpi_port_init_devices(ide_hwif_t *hwif)
+{
+	ide_drive_t *drive;
+	int i, err;
+
+	if (hwif->acpidata == NULL)
+		return;
 
 	/*
 	 * The ACPI spec mandates that we send information
 	 * for both drives, regardless whether they are connected
 	 * or not.
 	 */
-	hwif->acpidata->master.drive = &hwif->drives[0];
 	hwif->drives[0].acpidata = &hwif->acpidata->master;
-	master = &hwif->acpidata->master;
-
-	hwif->acpidata->slave.drive = &hwif->drives[1];
 	hwif->drives[1].acpidata = &hwif->acpidata->slave;
-	slave = &hwif->acpidata->slave;
-
 
 	/*
 	 * Send IDENTIFY for each drive
 	 */
-	if (master->drive->present) {
-		err = taskfile_lib_get_identify(master->drive, master->idbuff);
-		if (err) {
-			DEBPRINT("identify device %s failed (%d)\n",
-				 master->drive->name, err);
-		}
-	}
+	for (i = 0; i < MAX_DRIVES; i++) {
+		drive = &hwif->drives[i];
+
+		if (!drive->present)
+			continue;
 
-	if (slave->drive->present) {
-		err = taskfile_lib_get_identify(slave->drive, slave->idbuff);
-		if (err) {
+		err = taskfile_lib_get_identify(drive, drive->acpidata->idbuff);
+		if (err)
 			DEBPRINT("identify device %s failed (%d)\n",
-				 slave->drive->name, err);
-		}
+				 drive->name, err);
 	}
 
 	if (ide_noacpionboot) {
@@ -753,13 +732,11 @@ void ide_acpi_init(ide_hwif_t *hwif)
 	ide_acpi_get_timing(hwif);
 	ide_acpi_push_timing(hwif);
 
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t *drive = &hwif->drives[unit];
+	for (i = 0; i < MAX_DRIVES; i++) {
+		drive = &hwif->drives[i];
 
-		if (drive->present) {
+		if (drive->present)
 			/* Execute ACPI startup code */
 			ide_acpi_exec_tfs(drive);
-		}
 	}
 }
-EXPORT_SYMBOL_GPL(ide_acpi_init);
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 23074e8..ee4d458 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -604,8 +604,6 @@ static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive,
  * Block read functions.
  */
 
-typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
-
 static void ide_cd_pad_transfer(ide_drive_t *drive, xfer_func_t *xf, int len)
 {
 	while (len > 0) {
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 7beaf1e..3cf59f2 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -819,6 +819,26 @@ int ide_set_dma(ide_drive_t *drive)
 	return 0;
 }
 
+void ide_check_dma_crc(ide_drive_t *drive)
+{
+	u8 mode;
+
+	ide_dma_off_quietly(drive);
+	drive->crc_count = 0;
+	mode = drive->current_speed;
+	/*
+	 * Don't try non Ultra-DMA modes without iCRC's.  Force the
+	 * device to PIO and make the user enable SWDMA/MWDMA modes.
+	 */
+	if (mode > XFER_UDMA_0 && mode <= XFER_UDMA_7)
+		mode--;
+	else
+		mode = XFER_PIO_4;
+	ide_set_xfer_rate(drive, mode);
+	if (drive->current_speed >= XFER_SW_DMA_0)
+		ide_dma_on(drive);
+}
+
 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 void ide_dma_lost_irq (ide_drive_t *drive)
 {
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 3512637..f8fe6ee 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -4,11 +4,6 @@
  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
- */
-
-/*
- * The driver currently doesn't have any fancy features, just the bare
- * minimum read/write support.
  *
  * This driver supports the following IDE floppy drives:
  *
@@ -20,7 +15,7 @@
  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
  */
 
-#define IDEFLOPPY_VERSION "0.99.newide"
+#define IDEFLOPPY_VERSION "1.00"
 
 #include <linux/module.h>
 #include <linux/types.h>
@@ -42,179 +37,91 @@
 #include <scsi/scsi_ioctl.h>
 
 #include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/irq.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
 #include <asm/unaligned.h>
 
-/*
- *	The following are used to debug the driver.
- */
+/* define to see debug info */
 #define IDEFLOPPY_DEBUG_LOG		0
-#define IDEFLOPPY_DEBUG_INFO		0
-#define IDEFLOPPY_DEBUG_BUGS		1
 
 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
-#define IDEFLOPPY_DEBUG( fmt, args... )
+#define IDEFLOPPY_DEBUG(fmt, args...)
 
 #if IDEFLOPPY_DEBUG_LOG
-#define debug_log printk
+#define debug_log(fmt, args...) \
+	printk(KERN_INFO "ide-floppy: " fmt, ## args)
 #else
-#define debug_log(fmt, args... ) do {} while(0)
+#define debug_log(fmt, args...) do {} while (0)
 #endif
 
 
-/*
- *	Some drives require a longer irq timeout.
- */
+/* Some drives require a longer irq timeout. */
 #define IDEFLOPPY_WAIT_CMD		(5 * WAIT_CMD)
 
 /*
- *	After each failed packet command we issue a request sense command
- *	and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
+ * After each failed packet command we issue a request sense command and retry
+ * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
  */
 #define IDEFLOPPY_MAX_PC_RETRIES	3
 
 /*
- *	With each packet command, we allocate a buffer of
- *	IDEFLOPPY_PC_BUFFER_SIZE bytes.
+ * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
+ * bytes.
  */
 #define IDEFLOPPY_PC_BUFFER_SIZE	256
 
 /*
- *	In various places in the driver, we need to allocate storage
- *	for packet commands and requests, which will remain valid while
- *	we leave the driver to wait for an interrupt or a timeout event.
+ * In various places in the driver, we need to allocate storage for packet
+ * commands and requests, which will remain valid while	we leave the driver to
+ * wait for an interrupt or a timeout event.
  */
 #define IDEFLOPPY_PC_STACK		(10 + IDEFLOPPY_MAX_PC_RETRIES)
 
-/*
- *	Our view of a packet command.
- */
 typedef struct idefloppy_packet_command_s {
 	u8 c[12];				/* Actual packet bytes */
-	int retries;				/* On each retry, we increment retries */
+	int retries;				/* On each retry, we increment
+						   retries */
 	int error;				/* Error code */
 	int request_transfer;			/* Bytes to transfer */
 	int actually_transferred;		/* Bytes actually transferred */
 	int buffer_size;			/* Size of our data buffer */
-	int b_count;				/* Missing/Available data on the current buffer */
+	int b_count;				/* Missing/Available data on
+						   the current buffer */
 	struct request *rq;			/* The corresponding request */
 	u8 *buffer;				/* Data buffer */
-	u8 *current_position;			/* Pointer into the above buffer */
-	void (*callback) (ide_drive_t *);	/* Called when this packet command is completed */
+	u8 *current_position;			/* Pointer into above buffer */
+	void (*callback) (ide_drive_t *);	/* Called when this packet
+						   command is completed */
 	u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE];	/* Temporary buffer */
-	unsigned long flags;			/* Status/Action bit flags: long for set_bit */
+	unsigned long flags;			/* Status/Action bit flags: long
+						   for set_bit */
 } idefloppy_pc_t;
 
-/*
- *	Packet command flag bits.
- */
-#define	PC_ABORT			0	/* Set when an error is considered normal - We won't retry */
-#define PC_DMA_RECOMMENDED		2	/* 1 when we prefer to use DMA if possible */
-#define	PC_DMA_IN_PROGRESS		3	/* 1 while DMA in progress */
-#define	PC_DMA_ERROR			4	/* 1 when encountered problem during DMA */
-#define	PC_WRITING			5	/* Data direction */
-
-#define	PC_SUPPRESS_ERROR		6	/* Suppress error reporting */
-
-/*
- *	Removable Block Access Capabilities Page
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	page_code	:6;	/* Page code - Should be 0x1b */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	ps		:1;	/* Should be 0 */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	ps		:1;	/* Should be 0 */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	page_code	:6;	/* Page code - Should be 0x1b */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		page_length;		/* Page Length - Should be 0xa */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	reserved2	:6;
-	unsigned	srfp		:1;	/* Supports reporting progress of format */
-	unsigned	sflp		:1;	/* System floppy type device */
-	unsigned	tlun		:3;	/* Total logical units supported by the device */
-	unsigned	reserved3	:3;
-	unsigned	sml		:1;	/* Single / Multiple lun supported */
-	unsigned	ncd		:1;	/* Non cd optical device */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	sflp		:1;	/* System floppy type device */
-	unsigned	srfp		:1;	/* Supports reporting progress of format */
-	unsigned	reserved2	:6;
-	unsigned	ncd		:1;	/* Non cd optical device */
-	unsigned	sml		:1;	/* Single / Multiple lun supported */
-	unsigned	reserved3	:3;
-	unsigned	tlun		:3;	/* Total logical units supported by the device */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		reserved[8];
-} idefloppy_capabilities_page_t;
-
-/*
- *	Flexible disk page.
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	page_code	:6;	/* Page code - Should be 0x5 */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	ps		:1;	/* The device is capable of saving the page */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	ps		:1;	/* The device is capable of saving the page */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	page_code	:6;	/* Page code - Should be 0x5 */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		page_length;		/* Page Length - Should be 0x1e */
-	u16		transfer_rate;		/* In kilobits per second */
-	u8		heads, sectors;		/* Number of heads, Number of sectors per track */
-	u16		sector_size;		/* Byes per sector */
-	u16		cyls;			/* Number of cylinders */
-	u8		reserved10[10];
-	u8		motor_delay;		/* Motor off delay */
-	u8		reserved21[7];
-	u16		rpm;			/* Rotations per minute */
-	u8		reserved30[2];
-} idefloppy_flexible_disk_page_t;
- 
-/*
- *	Format capacity
- */
-typedef struct {
-	u8		reserved[3];
-	u8		length;			/* Length of the following descriptors in bytes */
-} idefloppy_capacity_header_t;
-
-typedef struct {
-	u32		blocks;			/* Number of blocks */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	dc		:2;	/* Descriptor Code */
-	unsigned	reserved	:6;
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	reserved	:6;
-	unsigned	dc		:2;	/* Descriptor Code */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		length_msb;		/* Block Length (MSB)*/
-	u16		length;			/* Block Length */
-} idefloppy_capacity_descriptor_t;
+/* Packet command flag bits. */
+enum {
+	/* 1 when we prefer to use DMA if possible */
+	PC_FLAG_DMA_RECOMMENDED	= (1 << 0),
+	/* 1 while DMA in progress */
+	PC_FLAG_DMA_IN_PROGRESS	= (1 << 1),
+	/* 1 when encountered problem during DMA */
+	PC_FLAG_DMA_ERROR	= (1 << 2),
+	/* Data direction */
+	PC_FLAG_WRITING		= (1 << 3),
+	/* Suppress error reporting */
+	PC_FLAG_SUPPRESS_ERROR	= (1 << 4),
+};
 
+/* format capacities descriptor codes */
 #define CAPACITY_INVALID	0x00
 #define CAPACITY_UNFORMATTED	0x01
 #define CAPACITY_CURRENT	0x02
 #define CAPACITY_NO_CARTRIDGE	0x03
 
 /*
- *	Most of our global data which we need to save even as we leave the
- *	driver due to an interrupt or a timer event is stored in a variable
- *	of type idefloppy_floppy_t, defined below.
+ * Most of our global data which we need to save even as we leave the driver
+ * due to an interrupt or a timer event is stored in a variable of type
+ * idefloppy_floppy_t, defined below.
  */
 typedef struct ide_floppy_obj {
 	ide_drive_t	*drive;
@@ -235,23 +142,19 @@ typedef struct ide_floppy_obj {
 	/* We implement a circular array */
 	int rq_stack_index;
 
-	/*
-	 *	Last error information
-	 */
+	/* Last error information */
 	u8 sense_key, asc, ascq;
 	/* delay this long before sending packet command */
 	u8 ticks;
 	int progress_indication;
 
-	/*
-	 *	Device information
-	 */
+	/* Device information */
 	/* Current format */
 	int blocks, block_size, bs_factor;
-	/* Last format capacity */
-	idefloppy_capacity_descriptor_t capacity;
+	/* Last format capacity descriptor */
+	u8 cap_desc[8];
 	/* Copy of the flexible disk page */
-	idefloppy_flexible_disk_page_t flexible_disk_page;
+	u8 flexible_disk_page[32];
 	/* Write protect */
 	int wp;
 	/* Supports format progress report */
@@ -262,64 +165,40 @@ typedef struct ide_floppy_obj {
 
 #define IDEFLOPPY_TICKS_DELAY	HZ/20	/* default delay for ZIP 100 (50ms) */
 
-/*
- *	Floppy flag bits values.
- */
-#define IDEFLOPPY_DRQ_INTERRUPT		0	/* DRQ interrupt device */
-#define IDEFLOPPY_MEDIA_CHANGED		1	/* Media may have changed */
-#define IDEFLOPPY_USE_READ12		2	/* Use READ12/WRITE12 or READ10/WRITE10 */
-#define	IDEFLOPPY_FORMAT_IN_PROGRESS	3	/* Format in progress */
-#define IDEFLOPPY_CLIK_DRIVE	        4       /* Avoid commands not supported in Clik drive */
-#define IDEFLOPPY_ZIP_DRIVE		5	/* Requires BH algorithm for packets */
-
-/*
- *	ATAPI floppy drive packet commands
- */
-#define IDEFLOPPY_FORMAT_UNIT_CMD	0x04
-#define IDEFLOPPY_INQUIRY_CMD		0x12
-#define IDEFLOPPY_MODE_SELECT_CMD	0x55
-#define IDEFLOPPY_MODE_SENSE_CMD	0x5a
-#define IDEFLOPPY_READ10_CMD		0x28
-#define IDEFLOPPY_READ12_CMD		0xa8
-#define IDEFLOPPY_READ_CAPACITY_CMD	0x23
-#define IDEFLOPPY_REQUEST_SENSE_CMD	0x03
-#define IDEFLOPPY_PREVENT_REMOVAL_CMD	0x1e
-#define IDEFLOPPY_SEEK_CMD		0x2b
-#define IDEFLOPPY_START_STOP_CMD	0x1b
-#define IDEFLOPPY_TEST_UNIT_READY_CMD	0x00
-#define IDEFLOPPY_VERIFY_CMD		0x2f
-#define IDEFLOPPY_WRITE10_CMD		0x2a
-#define IDEFLOPPY_WRITE12_CMD		0xaa
-#define IDEFLOPPY_WRITE_VERIFY_CMD	0x2e
+/* Floppy flag bits values. */
+enum {
+	/* DRQ interrupt device */
+	IDEFLOPPY_FLAG_DRQ_INTERRUPT		= (1 <<	0),
+	/* Media may have changed */
+	IDEFLOPPY_FLAG_MEDIA_CHANGED		= (1 << 1),
+	/* Format in progress */
+	IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS	= (1 << 2),
+	/* Avoid commands not supported in Clik drive */
+	IDEFLOPPY_FLAG_CLIK_DRIVE		= (1 << 3),
+	/* Requires BH algorithm for packets */
+	IDEFLOPPY_FLAG_ZIP_DRIVE		= (1 << 4),
+};
 
-/*
- *	Defines for the mode sense command
- */
+/* Defines for the MODE SENSE command */
 #define MODE_SENSE_CURRENT		0x00
 #define MODE_SENSE_CHANGEABLE		0x01
-#define MODE_SENSE_DEFAULT		0x02 
+#define MODE_SENSE_DEFAULT		0x02
 #define MODE_SENSE_SAVED		0x03
 
-/*
- *	IOCTLs used in low-level formatting.
- */
-
+/* IOCTLs used in low-level formatting. */
 #define	IDEFLOPPY_IOCTL_FORMAT_SUPPORTED	0x4600
 #define	IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY	0x4601
 #define	IDEFLOPPY_IOCTL_FORMAT_START		0x4602
 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS	0x4603
 
-/*
- *	Error codes which are returned in rq->errors to the higher part
- *	of the driver.
- */
+/* Error code returned in rq->errors to the higher part of the driver. */
 #define	IDEFLOPPY_ERROR_GENERAL		101
 
 /*
- *	The following is used to format the general configuration word of
- *	the ATAPI IDENTIFY DEVICE command.
+ * The following is used to format the general configuration word of the
+ * ATAPI IDENTIFY DEVICE command.
  */
-struct idefloppy_id_gcw {	
+struct idefloppy_id_gcw {
 #if defined(__LITTLE_ENDIAN_BITFIELD)
 	unsigned packet_size		:2;	/* Packet Size */
 	unsigned reserved234		:3;	/* Reserved */
@@ -342,103 +221,12 @@ struct idefloppy_id_gcw {
 };
 
 /*
- *	INQUIRY packet command - Data Format
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	device_type	:5;	/* Peripheral Device Type */
-	unsigned	reserved0_765	:3;	/* Peripheral Qualifier - Reserved */
-	unsigned	reserved1_6t0	:7;	/* Reserved */
-	unsigned	rmb		:1;	/* Removable Medium Bit */
-	unsigned	ansi_version	:3;	/* ANSI Version */
-	unsigned	ecma_version	:3;	/* ECMA Version */
-	unsigned	iso_version	:2;	/* ISO Version */
-	unsigned	response_format :4;	/* Response Data Format */
-	unsigned	reserved3_45	:2;	/* Reserved */
-	unsigned	reserved3_6	:1;	/* TrmIOP - Reserved */
-	unsigned	reserved3_7	:1;	/* AENC - Reserved */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	reserved0_765	:3;	/* Peripheral Qualifier - Reserved */
-	unsigned	device_type	:5;	/* Peripheral Device Type */
-	unsigned	rmb		:1;	/* Removable Medium Bit */
-	unsigned	reserved1_6t0	:7;	/* Reserved */
-	unsigned	iso_version	:2;	/* ISO Version */
-	unsigned	ecma_version	:3;	/* ECMA Version */
-	unsigned	ansi_version	:3;	/* ANSI Version */
-	unsigned	reserved3_7	:1;	/* AENC - Reserved */
-	unsigned	reserved3_6	:1;	/* TrmIOP - Reserved */
-	unsigned	reserved3_45	:2;	/* Reserved */
-	unsigned	response_format :4;	/* Response Data Format */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		additional_length;	/* Additional Length (total_length-4) */
-	u8		rsv5, rsv6, rsv7;	/* Reserved */
-	u8		vendor_id[8];		/* Vendor Identification */
-	u8		product_id[16];		/* Product Identification */
-	u8		revision_level[4];	/* Revision Level */
-	u8		vendor_specific[20];	/* Vendor Specific - Optional */
-	u8		reserved56t95[40];	/* Reserved - Optional */
-						/* Additional information may be returned */
-} idefloppy_inquiry_result_t;
-
-/*
- *	REQUEST SENSE packet command result - Data Format.
- */
-typedef struct {
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	error_code	:7;	/* Current error (0x70) */
-	unsigned	valid		:1;	/* The information field conforms to SFF-8070i */
-	u8		reserved1	:8;	/* Reserved */
-	unsigned	sense_key	:4;	/* Sense Key */
-	unsigned	reserved2_4	:1;	/* Reserved */
-	unsigned	ili		:1;	/* Incorrect Length Indicator */
-	unsigned	reserved2_67	:2;
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	valid		:1;	/* The information field conforms to SFF-8070i */
-	unsigned	error_code	:7;	/* Current error (0x70) */
-	u8		reserved1	:8;	/* Reserved */
-	unsigned	reserved2_67	:2;
-	unsigned	ili		:1;	/* Incorrect Length Indicator */
-	unsigned	reserved2_4	:1;	/* Reserved */
-	unsigned	sense_key	:4;	/* Sense Key */
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u32		information __attribute__ ((packed));
-	u8		asl;			/* Additional sense length (n-7) */
-	u32		command_specific;	/* Additional command specific information */
-	u8		asc;			/* Additional Sense Code */
-	u8		ascq;			/* Additional Sense Code Qualifier */
-	u8		replaceable_unit_code;	/* Field Replaceable Unit Code */
-	u8		sksv[3];
-	u8		pad[2];			/* Padding to 20 bytes */
-} idefloppy_request_sense_result_t;
-
-/*
- *	Pages of the SELECT SENSE / MODE SENSE packet commands.
+ * Pages of the SELECT SENSE / MODE SENSE packet commands.
+ * See SFF-8070i spec.
  */
 #define	IDEFLOPPY_CAPABILITIES_PAGE	0x1b
 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE	0x05
 
-/*
- *	Mode Parameter Header for the MODE SENSE packet command
- */
-typedef struct {
-	u16		mode_data_length;	/* Length of the following data transfer */
-	u8		medium_type;		/* Medium Type */
-#if defined(__LITTLE_ENDIAN_BITFIELD)
-	unsigned	reserved3	:7;
-	unsigned	wp		:1;	/* Write protect */
-#elif defined(__BIG_ENDIAN_BITFIELD)
-	unsigned	wp		:1;	/* Write protect */
-	unsigned	reserved3	:7;
-#else
-#error "Bitfield endianness not defined! Check your byteorder.h"
-#endif
-	u8		reserved[4];
-} idefloppy_mode_parameter_header_t;
-
 static DEFINE_MUTEX(idefloppy_ref_mutex);
 
 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
@@ -458,39 +246,35 @@ static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
 	return floppy;
 }
 
-static void ide_floppy_release(struct kref *);
+static void idefloppy_cleanup_obj(struct kref *);
 
 static void ide_floppy_put(struct ide_floppy_obj *floppy)
 {
 	mutex_lock(&idefloppy_ref_mutex);
-	kref_put(&floppy->kref, ide_floppy_release);
+	kref_put(&floppy->kref, idefloppy_cleanup_obj);
 	mutex_unlock(&idefloppy_ref_mutex);
 }
 
 /*
- *	Too bad. The drive wants to send us data which we are not ready to accept.
- *	Just throw it away.
+ * Too bad. The drive wants to send us data which we are not ready to accept.
+ * Just throw it away.
  */
-static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
+static void idefloppy_discard_data(ide_drive_t *drive, unsigned int bcount)
 {
 	while (bcount--)
 		(void) HWIF(drive)->INB(IDE_DATA_REG);
 }
 
-#if IDEFLOPPY_DEBUG_BUGS
-static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount)
+static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
 {
 	while (bcount--)
 		HWIF(drive)->OUTB(0, IDE_DATA_REG);
 }
-#endif /* IDEFLOPPY_DEBUG_BUGS */
 
 
 /*
- *	idefloppy_do_end_request is used to finish servicing a request.
- *
- *	For read/write requests, we will call ide_end_request to pass to the
- *	next buffer.
+ * Used to finish servicing a request. For read/write requests, we will call
+ * ide_end_request to pass to the next buffer.
  */
 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 {
@@ -498,12 +282,12 @@ static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 	struct request *rq = HWGROUP(drive)->rq;
 	int error;
 
-	debug_log(KERN_INFO "Reached idefloppy_end_request\n");
+	debug_log("Reached %s\n", __func__);
 
 	switch (uptodate) {
-		case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
-		case 1: error = 0; break;
-		default: error = uptodate;
+	case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
+	case 1: error = 0; break;
+	default: error = uptodate;
 	}
 	if (error)
 		floppy->failed_pc = NULL;
@@ -521,39 +305,8 @@ static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 	return 0;
 }
 
-static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
-{
-	struct request *rq = pc->rq;
-	struct bio_vec *bvec;
-	struct req_iterator iter;
-	unsigned long flags;
-	char *data;
-	int count, done = 0;
-
-	rq_for_each_segment(bvec, rq, iter) {
-		if (!bcount)
-			break;
-
-		count = min(bvec->bv_len, bcount);
-
-		data = bvec_kmap_irq(bvec, &flags);
-		drive->hwif->atapi_input_bytes(drive, data, count);
-		bvec_kunmap_irq(data, &flags);
-
-		bcount -= count;
-		pc->b_count += count;
-		done += count;
-	}
-
-	idefloppy_do_end_request(drive, 1, done >> 9);
-
-	if (bcount) {
-		printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount);
-		idefloppy_discard_data(drive, bcount);
-	}
-}
-
-static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount)
+static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
+				  unsigned int bcount, int direction)
 {
 	struct request *rq = pc->rq;
 	struct req_iterator iter;
@@ -569,7 +322,10 @@ static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, un
 		count = min(bvec->bv_len, bcount);
 
 		data = bvec_kmap_irq(bvec, &flags);
-		drive->hwif->atapi_output_bytes(drive, data, count);
+		if (direction)
+			drive->hwif->atapi_output_bytes(drive, data, count);
+		else
+			drive->hwif->atapi_input_bytes(drive, data, count);
 		bvec_kunmap_irq(data, &flags);
 
 		bcount -= count;
@@ -579,15 +335,18 @@ static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, un
 
 	idefloppy_do_end_request(drive, 1, done >> 9);
 
-#if IDEFLOPPY_DEBUG_BUGS
 	if (bcount) {
-		printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount);
-		idefloppy_write_zeros(drive, bcount);
+		printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
+				drive->name, __func__, bcount);
+		if (direction)
+			idefloppy_write_zeros(drive, bcount);
+		else
+			idefloppy_discard_data(drive, bcount);
+
 	}
-#endif
 }
 
-static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
+static void idefloppy_update_buffers(ide_drive_t *drive, idefloppy_pc_t *pc)
 {
 	struct request *rq = pc->rq;
 	struct bio *bio = rq->bio;
@@ -597,11 +356,12 @@ static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
 }
 
 /*
- *	idefloppy_queue_pc_head generates a new packet command request in front
- *	of the request queue, before the current request, so that it will be
- *	processed immediately, on the next pass through the driver.
+ * Generate a new packet command request in front of the request queue, before
+ * the current request so that it will be processed immediately, on the next
+ * pass through the driver.
  */
-static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
+static void idefloppy_queue_pc_head(ide_drive_t *drive, idefloppy_pc_t *pc,
+		struct request *rq)
 {
 	struct ide_floppy_obj *floppy = drive->driver_data;
 
@@ -612,16 +372,16 @@ static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struc
 	(void) ide_do_drive_cmd(drive, rq, ide_preempt);
 }
 
-static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
+static idefloppy_pc_t *idefloppy_next_pc_storage(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 
 	if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
-		floppy->pc_stack_index=0;
+		floppy->pc_stack_index = 0;
 	return (&floppy->pc_stack[floppy->pc_stack_index++]);
 }
 
-static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
+static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 
@@ -630,60 +390,53 @@ static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
 	return (&floppy->rq_stack[floppy->rq_stack_index++]);
 }
 
-/*
- *	idefloppy_analyze_error is called on each failed packet command retry
- *	to analyze the request sense.
- */
-static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result)
+static void idefloppy_request_sense_callback(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
+	u8 *buf = floppy->pc->buffer;
 
-	floppy->sense_key = result->sense_key;
-	floppy->asc = result->asc;
-	floppy->ascq = result->ascq;
-	floppy->progress_indication = result->sksv[0] & 0x80 ?
-		(u16)get_unaligned((u16 *)(result->sksv+1)):0x10000;
-	if (floppy->failed_pc)
-		debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, "
-			"asc = %x, ascq = %x\n", floppy->failed_pc->c[0],
-			result->sense_key, result->asc, result->ascq);
-	else
-		debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, "
-			"ascq = %x\n", result->sense_key,
-			result->asc, result->ascq);
-}
-
-static void idefloppy_request_sense_callback (ide_drive_t *drive)
-{
-	idefloppy_floppy_t *floppy = drive->driver_data;
+	debug_log("Reached %s\n", __func__);
 
-	debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
-	
 	if (!floppy->pc->error) {
-		idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer);
+		floppy->sense_key = buf[2] & 0x0F;
+		floppy->asc = buf[12];
+		floppy->ascq = buf[13];
+		floppy->progress_indication = buf[15] & 0x80 ?
+			(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
+
+		if (floppy->failed_pc)
+			debug_log("pc = %x, sense key = %x, asc = %x,"
+					" ascq = %x\n",
+					floppy->failed_pc->c[0],
+					floppy->sense_key,
+					floppy->asc,
+					floppy->ascq);
+		else
+			debug_log("sense key = %x, asc = %x, ascq = %x\n",
+					floppy->sense_key,
+					floppy->asc,
+					floppy->ascq);
+
+
 		idefloppy_do_end_request(drive, 1, 0);
 	} else {
-		printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n");
+		printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
+				" request!\n");
 		idefloppy_do_end_request(drive, 0, 0);
 	}
 }
 
-/*
- *	General packet command callback function.
- */
-static void idefloppy_pc_callback (ide_drive_t *drive)
+/* General packet command callback function. */
+static void idefloppy_pc_callback(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	
-	debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__);
+
+	debug_log("Reached %s\n", __func__);
 
 	idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 }
 
-/*
- *	idefloppy_init_pc initializes a packet command.
- */
-static void idefloppy_init_pc (idefloppy_pc_t *pc)
+static void idefloppy_init_pc(idefloppy_pc_t *pc)
 {
 	memset(pc->c, 0, 12);
 	pc->retries = 0;
@@ -694,21 +447,20 @@ static void idefloppy_init_pc (idefloppy_pc_t *pc)
 	pc->callback = &idefloppy_pc_callback;
 }
 
-static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
+static void idefloppy_create_request_sense_cmd(idefloppy_pc_t *pc)
 {
-	idefloppy_init_pc(pc);	
-	pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD;
+	idefloppy_init_pc(pc);
+	pc->c[0] = GPCMD_REQUEST_SENSE;
 	pc->c[4] = 255;
 	pc->request_transfer = 18;
 	pc->callback = &idefloppy_request_sense_callback;
 }
 
 /*
- *	idefloppy_retry_pc is called when an error was detected during the
- *	last packet command. We queue a request sense packet command in
- *	the head of the request list.
+ * Called when an error was detected during the last packet command. We queue a
+ * request sense packet command in the head of the request list.
  */
-static void idefloppy_retry_pc (ide_drive_t *drive)
+static void idefloppy_retry_pc(ide_drive_t *drive)
 {
 	idefloppy_pc_t *pc;
 	struct request *rq;
@@ -720,49 +472,50 @@ static void idefloppy_retry_pc (ide_drive_t *drive)
 	idefloppy_queue_pc_head(drive, pc, rq);
 }
 
-/*
- *	idefloppy_pc_intr is the usual interrupt handler which will be called
- *	during a packet command.
- */
+/* The usual interrupt handler called during a packet command. */
 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
 	idefloppy_pc_t *pc = floppy->pc;
 	struct request *rq = pc->rq;
+	xfer_func_t *xferfunc;
 	unsigned int temp;
+	int dma_error = 0;
 	u16 bcount;
 	u8 stat, ireason;
 
-	debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n",
-		__FUNCTION__);
+	debug_log("Reached %s interrupt handler\n", __func__);
 
-	if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
-		if (HWIF(drive)->ide_dma_end(drive)) {
-			set_bit(PC_DMA_ERROR, &pc->flags);
+	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+		dma_error = hwif->ide_dma_end(drive);
+		if (dma_error) {
+			printk(KERN_ERR "%s: DMA %s error\n", drive->name,
+					rq_data_dir(rq) ? "write" : "read");
+			pc->flags |= PC_FLAG_DMA_ERROR;
 		} else {
 			pc->actually_transferred = pc->request_transfer;
 			idefloppy_update_buffers(drive, pc);
 		}
-		debug_log(KERN_INFO "ide-floppy: DMA finished\n");
+		debug_log("DMA finished\n");
 	}
 
 	/* Clear the interrupt */
 	stat = drive->hwif->INB(IDE_STATUS_REG);
 
-	if ((stat & DRQ_STAT) == 0) {		/* No more interrupts */
-		debug_log(KERN_INFO "Packet command completed, %d bytes "
-			"transferred\n", pc->actually_transferred);
-		clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
+	/* No more interrupts */
+	if ((stat & DRQ_STAT) == 0) {
+		debug_log("Packet command completed, %d bytes transferred\n",
+				pc->actually_transferred);
+		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 
 		local_irq_enable_in_hardirq();
 
-		if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
+		if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
 			/* Error detected */
-			debug_log(KERN_INFO "ide-floppy: %s: I/O error\n",
-				drive->name);
+			debug_log("%s: I/O error\n", drive->name);
 			rq->errors++;
-			if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) {
+			if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 				printk(KERN_ERR "ide-floppy: I/O error in "
 					"request sense command\n");
 				return ide_do_reset(drive);
@@ -780,7 +533,8 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 		return ide_stopped;
 	}
 
-	if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
+	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
+		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 		printk(KERN_ERR "ide-floppy: The floppy wants to issue "
 			"more interrupts in DMA mode\n");
 		ide_dma_off(drive);
@@ -794,10 +548,10 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	ireason = hwif->INB(IDE_IREASON_REG);
 
 	if (ireason & CD) {
-		printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n");
+		printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
 		return ide_do_reset(drive);
 	}
-	if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
+	if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
 		/* Hopefully, we will never get here */
 		printk(KERN_ERR "ide-floppy: We wanted to %s, ",
 				(ireason & IO) ? "Write" : "Read");
@@ -805,7 +559,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 				(ireason & IO) ? "Read" : "Write");
 		return ide_do_reset(drive);
 	}
-	if (!test_bit(PC_WRITING, &pc->flags)) {
+	if (!(pc->flags & PC_FLAG_WRITING)) {
 		/* Reading - Check that we have enough space */
 		temp = pc->actually_transferred + bcount;
 		if (temp > pc->request_transfer) {
@@ -814,39 +568,34 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 					"to send us more data than expected "
 					"- discarding data\n");
 				idefloppy_discard_data(drive, bcount);
-				BUG_ON(HWGROUP(drive)->handler != NULL);
+
 				ide_set_handler(drive,
 						&idefloppy_pc_intr,
 						IDEFLOPPY_WAIT_CMD,
 						NULL);
 				return ide_started;
 			}
-			debug_log(KERN_NOTICE "ide-floppy: The floppy wants to "
-				"send us more data than expected - "
-				"allowing transfer\n");
+			debug_log("The floppy wants to send us more data than"
+					" expected - allowing transfer\n");
 		}
 	}
-	if (test_bit(PC_WRITING, &pc->flags)) {
-		if (pc->buffer != NULL)
-			/* Write the current buffer */
-			hwif->atapi_output_bytes(drive, pc->current_position,
-						 bcount);
-		else
-			idefloppy_output_buffers(drive, pc, bcount);
-	} else {
-		if (pc->buffer != NULL)
-			/* Read the current buffer */
-			hwif->atapi_input_bytes(drive, pc->current_position,
-						bcount);
-		else
-			idefloppy_input_buffers(drive, pc, bcount);
-	}
+	if (pc->flags & PC_FLAG_WRITING)
+		xferfunc = hwif->atapi_output_bytes;
+	else
+		xferfunc = hwif->atapi_input_bytes;
+
+	if (pc->buffer)
+		xferfunc(drive, pc->current_position, bcount);
+	else
+		ide_floppy_io_buffers(drive, pc, bcount,
+				      !!(pc->flags & PC_FLAG_WRITING));
+
 	/* Update the current position */
 	pc->actually_transferred += bcount;
 	pc->current_position += bcount;
 
-	BUG_ON(HWGROUP(drive)->handler != NULL);
-	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);		/* And set the interrupt handler again */
+	/* And set the interrupt handler again */
+	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 	return ide_started;
 }
 
@@ -855,7 +604,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
  * for that drive below. The algorithm is chosen based on drive type
  */
-static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
+static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
 {
 	ide_startstop_t startstop;
 	idefloppy_floppy_t *floppy = drive->driver_data;
@@ -872,7 +621,7 @@ static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 				"issuing a packet command\n");
 		return ide_do_reset(drive);
 	}
-	BUG_ON(HWGROUP(drive)->handler != NULL);
+
 	/* Set the interrupt routine */
 	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
 	/* Send the actual packet */
@@ -882,18 +631,16 @@ static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
 
 
 /*
- * What we have here is a classic case of a top half / bottom half
- * interrupt service routine. In interrupt mode, the device sends
- * an interrupt to signal it's ready to receive a packet. However,
- * we need to delay about 2-3 ticks before issuing the packet or we
- * gets in trouble.
+ * What we have here is a classic case of a top half / bottom half interrupt
+ * service routine. In interrupt mode, the device sends an interrupt to signal
+ * that it is ready to receive a packet. However, we need to delay about 2-3
+ * ticks before issuing the packet or we gets in trouble.
  *
- * So, follow carefully. transfer_pc1 is called as an interrupt (or
- * directly). In either case, when the device says it's ready for a 
- * packet, we schedule the packet transfer to occur about 2-3 ticks
- * later in transfer_pc2.
+ * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
+ * In either case, when the device says it's ready for a packet, we schedule
+ * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
  */
-static int idefloppy_transfer_pc2 (ide_drive_t *drive)
+static int idefloppy_transfer_pc2(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 
@@ -903,7 +650,7 @@ static int idefloppy_transfer_pc2 (ide_drive_t *drive)
 	return IDEFLOPPY_WAIT_CMD;
 }
 
-static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
+static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_startstop_t startstop;
@@ -920,7 +667,7 @@ static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 				"while issuing a packet command\n");
 		return ide_do_reset(drive);
 	}
-	/* 
+	/*
 	 * The following delay solves a problem with ATAPI Zip 100 drives
 	 * where the Busy flag was apparently being deasserted before the
 	 * unit was ready to receive data. This was happening on a
@@ -928,32 +675,30 @@ static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
 	 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
 	 * used until after the packet is moved in about 50 msec.
 	 */
-	BUG_ON(HWGROUP(drive)->handler != NULL);
-	ide_set_handler(drive, 
-	  &idefloppy_pc_intr, 		/* service routine for packet command */
-	  floppy->ticks,		/* wait this long before "failing" */
-	  &idefloppy_transfer_pc2);	/* fail == transfer_pc2 */
+
+	ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks,
+			&idefloppy_transfer_pc2);
 	return ide_started;
 }
 
-/**
- * idefloppy_should_report_error()
- *
- * Supresses error messages resulting from Medium not present
- */
-static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy)
+static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
+				    idefloppy_pc_t *pc)
 {
+	/* supress error messages resulting from Medium not present */
 	if (floppy->sense_key == 0x02 &&
 	    floppy->asc       == 0x3a &&
 	    floppy->ascq      == 0x00)
-		return 0;
-	return 1;
+		return;
+
+	printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
+			"asc = %2x, ascq = %2x\n",
+			floppy->drive->name, pc->c[0], floppy->sense_key,
+			floppy->asc, floppy->ascq);
+
 }
 
-/*
- *	Issue a packet command
- */
-static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
+static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
+		idefloppy_pc_t *pc)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
@@ -962,36 +707,23 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	u8 dma;
 
 	if (floppy->failed_pc == NULL &&
-	    pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD)
+	    pc->c[0] != GPCMD_REQUEST_SENSE)
 		floppy->failed_pc = pc;
 	/* Set the current packet command */
 	floppy->pc = pc;
 
-	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES ||
-	    test_bit(PC_ABORT, &pc->flags)) {
-		/*
-		 *	We will "abort" retrying a packet command in case
-		 *	a legitimate error code was received.
-		 */
-		if (!test_bit(PC_ABORT, &pc->flags)) {
-			if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) {
-				if (idefloppy_should_report_error(floppy))
-					printk(KERN_ERR "ide-floppy: %s: I/O error, "
-					       "pc = %2x, key = %2x, "
-					       "asc = %2x, ascq = %2x\n",
-					       drive->name, pc->c[0],
-					       floppy->sense_key,
-					       floppy->asc, floppy->ascq);
-			}
-			/* Giving up */
-			pc->error = IDEFLOPPY_ERROR_GENERAL;
-		}
+	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
+		if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
+			ide_floppy_report_error(floppy, pc);
+		/* Giving up */
+		pc->error = IDEFLOPPY_ERROR_GENERAL;
+
 		floppy->failed_pc = NULL;
 		pc->callback(drive);
 		return ide_stopped;
 	}
 
-	debug_log(KERN_INFO "Retry number - %d\n",pc->retries);
+	debug_log("Retry number - %d\n", pc->retries);
 
 	pc->retries++;
 	/* We haven't transferred any data yet */
@@ -999,24 +731,26 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	pc->current_position = pc->buffer;
 	bcount = min(pc->request_transfer, 63 * 1024);
 
-	if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
+	if (pc->flags & PC_FLAG_DMA_ERROR) {
+		pc->flags &= ~PC_FLAG_DMA_ERROR;
 		ide_dma_off(drive);
-
+	}
 	dma = 0;
 
-	if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
+	if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
 		dma = !hwif->dma_setup(drive);
 
 	ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
 			   IDE_TFLAG_OUT_DEVICE, bcount, dma);
 
-	if (dma) {	/* Begin DMA, if necessary */
-		set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
+	if (dma) {
+		/* Begin DMA, if necessary */
+		pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
 		hwif->dma_start(drive);
 	}
 
 	/* Can we transfer the packet when we get the interrupt or wait? */
-	if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
+	if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
 		/* wait */
 		pkt_xfer_routine = &idefloppy_transfer_pc1;
 	} else {
@@ -1024,7 +758,7 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 		pkt_xfer_routine = &idefloppy_transfer_pc;
 	}
 	
-	if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
+	if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
 		/* Issue the packet command */
 		ide_execute_command(drive, WIN_PACKETCMD,
 				pkt_xfer_routine,
@@ -1038,38 +772,37 @@ static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *p
 	}
 }
 
-static void idefloppy_rw_callback (ide_drive_t *drive)
+static void idefloppy_rw_callback(ide_drive_t *drive)
 {
-	debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n");
+	debug_log("Reached %s\n", __func__);
 
 	idefloppy_do_end_request(drive, 1, 0);
 	return;
 }
 
-static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
+static void idefloppy_create_prevent_cmd(idefloppy_pc_t *pc, int prevent)
 {
-	debug_log(KERN_INFO "ide-floppy: creating prevent removal command, "
-		"prevent = %d\n", prevent);
+	debug_log("creating prevent removal command, prevent = %d\n", prevent);
 
 	idefloppy_init_pc(pc);
-	pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD;
+	pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
 	pc->c[4] = prevent;
 }
 
-static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
+static void idefloppy_create_read_capacity_cmd(idefloppy_pc_t *pc)
 {
 	idefloppy_init_pc(pc);
-	pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD;
+	pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 	pc->c[7] = 255;
 	pc->c[8] = 255;
 	pc->request_transfer = 255;
 }
 
-static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
+static void idefloppy_create_format_unit_cmd(idefloppy_pc_t *pc, int b, int l,
 					      int flags)
 {
 	idefloppy_init_pc(pc);
-	pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD;
+	pc->c[0] = GPCMD_FORMAT_UNIT;
 	pc->c[1] = 0x17;
 
 	memset(pc->buffer, 0, 12);
@@ -1080,83 +813,79 @@ static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
 		pc->buffer[1] ^= 0x20;		/* ... turn off DCRT bit */
 	pc->buffer[3] = 8;
 
-	put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4]));
-	put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8]));
-	pc->buffer_size=12;
-	set_bit(PC_WRITING, &pc->flags);
+	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
+	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
+	pc->buffer_size = 12;
+	pc->flags |= PC_FLAG_WRITING;
 }
 
-/*
- *	A mode sense command is used to "sense" floppy parameters.
- */
-static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
+/* A mode sense command is used to "sense" floppy parameters. */
+static void idefloppy_create_mode_sense_cmd(idefloppy_pc_t *pc, u8 page_code,
+		u8 type)
 {
-	u16 length = sizeof(idefloppy_mode_parameter_header_t);
-	
+	u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
+
 	idefloppy_init_pc(pc);
-	pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD;
+	pc->c[0] = GPCMD_MODE_SENSE_10;
 	pc->c[1] = 0;
 	pc->c[2] = page_code + (type << 6);
 
 	switch (page_code) {
-		case IDEFLOPPY_CAPABILITIES_PAGE:
-			length += 12;
-			break;
-		case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
-			length += 32;
-			break;
-		default:
-			printk(KERN_ERR "ide-floppy: unsupported page code "
+	case IDEFLOPPY_CAPABILITIES_PAGE:
+		length += 12;
+		break;
+	case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
+		length += 32;
+		break;
+	default:
+		printk(KERN_ERR "ide-floppy: unsupported page code "
 				"in create_mode_sense_cmd\n");
 	}
-	put_unaligned(htons(length), (u16 *) &pc->c[7]);
+	put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 	pc->request_transfer = length;
 }
 
-static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
+static void idefloppy_create_start_stop_cmd(idefloppy_pc_t *pc, int start)
 {
 	idefloppy_init_pc(pc);
-	pc->c[0] = IDEFLOPPY_START_STOP_CMD;
+	pc->c[0] = GPCMD_START_STOP_UNIT;
 	pc->c[4] = start;
 }
 
 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
 {
 	idefloppy_init_pc(pc);
-	pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD;
+	pc->c[0] = GPCMD_TEST_UNIT_READY;
 }
 
-static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector)
+static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
+				    idefloppy_pc_t *pc, struct request *rq,
+				    unsigned long sector)
 {
 	int block = sector / floppy->bs_factor;
 	int blocks = rq->nr_sectors / floppy->bs_factor;
 	int cmd = rq_data_dir(rq);
 
-	debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n",
-		2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags),
+	debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
 		block, blocks);
 
 	idefloppy_init_pc(pc);
-	if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) {
-		pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD;
-		put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]);
-	} else {
-		pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD;
-		put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]);
-	}
-	put_unaligned(htonl(block), (unsigned int *) &pc->c[2]);
+	pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
+	put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
+	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
+
 	pc->callback = &idefloppy_rw_callback;
 	pc->rq = rq;
 	pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 	if (rq->cmd_flags & REQ_RW)
-		set_bit(PC_WRITING, &pc->flags);
+		pc->flags |= PC_FLAG_WRITING;
 	pc->buffer = NULL;
 	pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
-	set_bit(PC_DMA_RECOMMENDED, &pc->flags);
+	pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
-static void
-idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
+static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
+		idefloppy_pc_t *pc, struct request *rq)
 {
 	idefloppy_init_pc(pc);
 	pc->callback = &idefloppy_rw_callback;
@@ -1164,11 +893,10 @@ idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct req
 	pc->rq = rq;
 	pc->b_count = rq->data_len;
 	if (rq->data_len && rq_data_dir(rq) == WRITE)
-		set_bit(PC_WRITING, &pc->flags);
+		pc->flags |= PC_FLAG_WRITING;
 	pc->buffer = rq->data;
 	if (rq->bio)
-		set_bit(PC_DMA_RECOMMENDED, &pc->flags);
-		
+		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 	/*
 	 * possibly problematic, doesn't look like ide-floppy correctly
 	 * handled scattered requests if dma fails...
@@ -1176,30 +904,23 @@ idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct req
 	pc->request_transfer = pc->buffer_size = rq->data_len;
 }
 
-/*
- *	idefloppy_do_request is our request handling function.	
- */
-static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
+static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
+		struct request *rq, sector_t block_s)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	idefloppy_pc_t *pc;
 	unsigned long block = (unsigned long)block_s;
 
-	debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n",
+	debug_log("dev: %s, cmd_type: %x, errors: %d\n",
 			rq->rq_disk ? rq->rq_disk->disk_name : "?",
-			rq->flags, rq->errors);
-	debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, "
+			rq->cmd_type, rq->errors);
+	debug_log("sector: %ld, nr_sectors: %ld, "
 			"current_nr_sectors: %d\n", (long)rq->sector,
 			rq->nr_sectors, rq->current_nr_sectors);
 
 	if (rq->errors >= ERROR_MAX) {
-		if (floppy->failed_pc != NULL) {
-			if (idefloppy_should_report_error(floppy))
-				printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x,"
-				       " key = %2x, asc = %2x, ascq = %2x\n",
-				       drive->name, floppy->failed_pc->c[0],
-				       floppy->sense_key, floppy->asc, floppy->ascq);
-		}
+		if (floppy->failed_pc)
+			ide_floppy_report_error(floppy, floppy->failed_pc);
 		else
 			printk(KERN_ERR "ide-floppy: %s: I/O error\n",
 				drive->name);
@@ -1209,8 +930,8 @@ static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request
 	if (blk_fs_request(rq)) {
 		if (((long)rq->sector % floppy->bs_factor) ||
 		    (rq->nr_sectors % floppy->bs_factor)) {
-			printk("%s: unsupported r/w request size\n",
-				drive->name);
+			printk(KERN_ERR "%s: unsupported r/w request size\n",
+					drive->name);
 			idefloppy_do_end_request(drive, 0, 0);
 			return ide_stopped;
 		}
@@ -1233,15 +954,15 @@ static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request
 }
 
 /*
- *	idefloppy_queue_pc_tail adds a special packet command request to the
- *	tail of the request queue, and waits for it to be serviced.
+ * Add a special packet command request to the tail of the request queue,
+ * and wait for it to be serviced.
  */
-static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
+static int idefloppy_queue_pc_tail(ide_drive_t *drive, idefloppy_pc_t *pc)
 {
 	struct ide_floppy_obj *floppy = drive->driver_data;
 	struct request rq;
 
-	ide_init_drive_cmd (&rq);
+	ide_init_drive_cmd(&rq);
 	rq.buffer = (char *) pc;
 	rq.cmd_type = REQ_TYPE_SPECIAL;
 	rq.rq_disk = floppy->disk;
@@ -1250,88 +971,90 @@ static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
 }
 
 /*
- *	Look at the flexible disk page parameters. We will ignore the CHS
- *	capacity parameters and use the LBA parameters instead.
+ * Look at the flexible disk page parameters. We ignore the CHS capacity
+ * parameters and use the LBA parameters instead.
  */
-static int idefloppy_get_flexible_disk_page (ide_drive_t *drive)
+static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	idefloppy_pc_t pc;
-	idefloppy_mode_parameter_header_t *header;
-	idefloppy_flexible_disk_page_t *page;
+	u8 *page;
 	int capacity, lba_capacity;
+	u16 transfer_rate, sector_size, cyls, rpm;
+	u8 heads, sectors;
+
+	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
+					MODE_SENSE_CURRENT);
 
-	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT);
-	if (idefloppy_queue_pc_tail(drive,&pc)) {
-		printk(KERN_ERR "ide-floppy: Can't get flexible disk "
-			"page parameters\n");
+	if (idefloppy_queue_pc_tail(drive, &pc)) {
+		printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
+				" parameters\n");
 		return 1;
 	}
-	header = (idefloppy_mode_parameter_header_t *) pc.buffer;
-	floppy->wp = header->wp;
+	floppy->wp = !!(pc.buffer[3] & 0x80);
 	set_disk_ro(floppy->disk, floppy->wp);
-	page = (idefloppy_flexible_disk_page_t *) (header + 1);
-
-	page->transfer_rate = ntohs(page->transfer_rate);
-	page->sector_size = ntohs(page->sector_size);
-	page->cyls = ntohs(page->cyls);
-	page->rpm = ntohs(page->rpm);
-	capacity = page->cyls * page->heads * page->sectors * page->sector_size;
-	if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t)))
+	page = &pc.buffer[8];
+
+	transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
+	sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
+	cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
+	rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
+	heads         = pc.buffer[8 + 4];
+	sectors       = pc.buffer[8 + 5];
+
+	capacity = cyls * heads * sectors * sector_size;
+
+	if (memcmp(page, &floppy->flexible_disk_page, 32))
 		printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 				"%d sector size, %d rpm\n",
-			drive->name, capacity / 1024, page->cyls,
-			page->heads, page->sectors,
-			page->transfer_rate / 8, page->sector_size, page->rpm);
-
-	floppy->flexible_disk_page = *page;
-	drive->bios_cyl = page->cyls;
-	drive->bios_head = page->heads;
-	drive->bios_sect = page->sectors;
+				drive->name, capacity / 1024, cyls, heads,
+				sectors, transfer_rate / 8, sector_size, rpm);
+
+	memcpy(&floppy->flexible_disk_page, page, 32);
+	drive->bios_cyl = cyls;
+	drive->bios_head = heads;
+	drive->bios_sect = sectors;
 	lba_capacity = floppy->blocks * floppy->block_size;
+
 	if (capacity < lba_capacity) {
 		printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
 			"bytes, but the drive only handles %d\n",
 			drive->name, lba_capacity, capacity);
-		floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0;
+		floppy->blocks = floppy->block_size ?
+			capacity / floppy->block_size : 0;
 	}
 	return 0;
 }
 
-static int idefloppy_get_capability_page(ide_drive_t *drive)
+static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	idefloppy_pc_t pc;
-	idefloppy_mode_parameter_header_t *header;
-	idefloppy_capabilities_page_t *page;
 
 	floppy->srfp = 0;
 	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
 						 MODE_SENSE_CURRENT);
 
-	set_bit(PC_SUPPRESS_ERROR, &pc.flags);
-	if (idefloppy_queue_pc_tail(drive,&pc)) {
+	pc.flags |= PC_FLAG_SUPPRESS_ERROR;
+	if (idefloppy_queue_pc_tail(drive, &pc))
 		return 1;
-	}
 
-	header = (idefloppy_mode_parameter_header_t *) pc.buffer;
-	page= (idefloppy_capabilities_page_t *)(header+1);
-	floppy->srfp = page->srfp;
+	floppy->srfp = pc.buffer[8 + 2] & 0x40;
 	return (0);
 }
 
 /*
- *	Determine if a media is present in the floppy drive, and if so,
- *	its LBA capacity.
+ * Determine if a media is present in the floppy drive, and if so, its LBA
+ * capacity.
  */
-static int idefloppy_get_capacity (ide_drive_t *drive)
+static int ide_floppy_get_capacity(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	idefloppy_pc_t pc;
-	idefloppy_capacity_header_t *header;
-	idefloppy_capacity_descriptor_t *descriptor;
-	int i, descriptors, rc = 1, blocks, length;
-	
+	u8 *cap_desc;
+	u8 header_len, desc_cnt;
+	int i, rc = 1, blocks, length;
+
 	drive->bios_cyl = 0;
 	drive->bios_head = drive->bios_sect = 0;
 	floppy->blocks = 0;
@@ -1343,44 +1066,55 @@ static int idefloppy_get_capacity (ide_drive_t *drive)
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 		return 1;
 	}
-	header = (idefloppy_capacity_header_t *) pc.buffer;
-	descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t);
-	descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
+	header_len = pc.buffer[3];
+	cap_desc = &pc.buffer[4];
+	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
+
+	for (i = 0; i < desc_cnt; i++) {
+		unsigned int desc_start = 4 + i*8;
+
+		blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
+		length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
 
-	for (i = 0; i < descriptors; i++, descriptor++) {
-		blocks = descriptor->blocks = ntohl(descriptor->blocks);
-		length = descriptor->length = ntohs(descriptor->length);
+		debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
+				i, blocks * length / 1024, blocks, length);
 
-		if (!i) 
-		{
-		switch (descriptor->dc) {
+		if (i)
+			continue;
+		/*
+		 * the code below is valid only for the 1st descriptor, ie i=0
+		 */
+
+		switch (pc.buffer[desc_start + 4] & 0x03) {
 		/* Clik! drive returns this instead of CAPACITY_CURRENT */
 		case CAPACITY_UNFORMATTED:
-			if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
-                                /*
+			if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
+				/*
 				 * If it is not a clik drive, break out
 				 * (maintains previous driver behaviour)
 				 */
 				break;
 		case CAPACITY_CURRENT:
 			/* Normal Zip/LS-120 disks */
-			if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t)))
+			if (memcmp(cap_desc, &floppy->cap_desc, 8))
 				printk(KERN_INFO "%s: %dkB, %d blocks, %d "
 					"sector size\n", drive->name,
 					blocks * length / 1024, blocks, length);
-			floppy->capacity = *descriptor;
+			memcpy(&floppy->cap_desc, cap_desc, 8);
+
 			if (!length || length % 512) {
 				printk(KERN_NOTICE "%s: %d bytes block size "
 					"not supported\n", drive->name, length);
 			} else {
-                                floppy->blocks = blocks;
-                                floppy->block_size = length;
-                                if ((floppy->bs_factor = length / 512) != 1)
-                                        printk(KERN_NOTICE "%s: warning: non "
+				floppy->blocks = blocks;
+				floppy->block_size = length;
+				floppy->bs_factor = length / 512;
+				if (floppy->bs_factor != 1)
+					printk(KERN_NOTICE "%s: warning: non "
 						"512 bytes block size not "
 						"fully supported\n",
 						drive->name);
-                                rc = 0;
+				rc = 0;
 			}
 			break;
 		case CAPACITY_NO_CARTRIDGE:
@@ -1395,54 +1129,42 @@ static int idefloppy_get_capacity (ide_drive_t *drive)
 				"in drive\n", drive->name);
 			break;
 		}
-		}
-		if (!i) {
-			debug_log( "Descriptor 0 Code: %d\n",
-				descriptor->dc);
-		}
-		debug_log( "Descriptor %d: %dkB, %d blocks, %d "
-			"sector size\n", i, blocks * length / 1024, blocks,
-			length);
+		debug_log("Descriptor 0 Code: %d\n",
+			  pc.buffer[desc_start + 4] & 0x03);
 	}
 
 	/* Clik! disk does not support get_flexible_disk_page */
-        if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
-		(void) idefloppy_get_flexible_disk_page(drive);
-	}
+	if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
+		(void) ide_floppy_get_flexible_disk_page(drive);
 
 	set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
 	return rc;
 }
 
 /*
-** Obtain the list of formattable capacities.
-** Very similar to idefloppy_get_capacity, except that we push the capacity
-** descriptors to userland, instead of our own structures.
-**
-** Userland gives us the following structure:
-**
-** struct idefloppy_format_capacities {
-**        int nformats;
-**        struct {
-**                int nblocks;
-**                int blocksize;
-**                } formats[];
-**        } ;
-**
-** userland initializes nformats to the number of allocated formats[]
-** records.  On exit we set nformats to the number of records we've
-** actually initialized.
-**
-*/
-
-static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
+ * Obtain the list of formattable capacities.
+ * Very similar to ide_floppy_get_capacity, except that we push the capacity
+ * descriptors to userland, instead of our own structures.
+ *
+ * Userland gives us the following structure:
+ *
+ * struct idefloppy_format_capacities {
+ *	int nformats;
+ *	struct {
+ *		int nblocks;
+ *		int blocksize;
+ *	} formats[];
+ * };
+ *
+ * userland initializes nformats to the number of allocated formats[] records.
+ * On exit we set nformats to the number of records we've actually initialized.
+ */
+
+static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 {
-        idefloppy_pc_t pc;
-	idefloppy_capacity_header_t *header;
-        idefloppy_capacity_descriptor_t *descriptor;
-	int i, descriptors, blocks, length;
-	int u_array_size;
-	int u_index;
+	idefloppy_pc_t pc;
+	u8 header_len, desc_cnt;
+	int i, blocks, length, u_array_size, u_index;
 	int __user *argp;
 
 	if (get_user(u_array_size, arg))
@@ -1454,30 +1176,27 @@ static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 	idefloppy_create_read_capacity_cmd(&pc);
 	if (idefloppy_queue_pc_tail(drive, &pc)) {
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
-                return (-EIO);
-        }
-        header = (idefloppy_capacity_header_t *) pc.buffer;
-        descriptors = header->length /
-		sizeof(idefloppy_capacity_descriptor_t);
-	descriptor = (idefloppy_capacity_descriptor_t *) (header + 1);
+		return (-EIO);
+	}
+	header_len = pc.buffer[3];
+	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	u_index = 0;
 	argp = arg + 1;
 
 	/*
-	** We always skip the first capacity descriptor.  That's the
-	** current capacity.  We are interested in the remaining descriptors,
-	** the formattable capacities.
-	*/
+	 * We always skip the first capacity descriptor.  That's the current
+	 * capacity.  We are interested in the remaining descriptors, the
+	 * formattable capacities.
+	 */
+	for (i = 1; i < desc_cnt; i++) {
+		unsigned int desc_start = 4 + i*8;
 
-	for (i=0; i<descriptors; i++, descriptor++) {
 		if (u_index >= u_array_size)
 			break;	/* User-supplied buffer too small */
-		if (i == 0)
-			continue;	/* Skip the first descriptor */
 
-		blocks = ntohl(descriptor->blocks);
-		length = ntohs(descriptor->length);
+		blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
+		length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
 
 		if (put_user(blocks, argp))
 			return(-EFAULT);
@@ -1496,53 +1215,14 @@ static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 }
 
 /*
-** Send ATAPI_FORMAT_UNIT to the drive.
-**
-** Userland gives us the following structure:
-**
-** struct idefloppy_format_command {
-**        int nblocks;
-**        int blocksize;
-**        int flags;
-**        } ;
-**
-** flags is a bitmask, currently, the only defined flag is:
-**
-**        0x01 - verify media after format.
-*/
-
-static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg)
-{
-	int blocks;
-	int length;
-	int flags;
-	idefloppy_pc_t pc;
-
-	if (get_user(blocks, arg) ||
-	    get_user(length, arg+1) ||
-	    get_user(flags, arg+2)) {
-		return (-EFAULT);
-	}
-
-	/* Get the SFRP bit */
-	(void) idefloppy_get_capability_page(drive);
-	idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
-	if (idefloppy_queue_pc_tail(drive, &pc)) {
-                return (-EIO);
-	}
-
-	return (0);
-}
-
-/*
-** Get ATAPI_FORMAT_UNIT progress indication.
-**
-** Userland gives a pointer to an int.  The int is set to a progress
-** indicator 0-65536, with 65536=100%.
-**
-** If the drive does not support format progress indication, we just check
-** the dsc bit, and return either 0 or 65536.
-*/
+ * Get ATAPI_FORMAT_UNIT progress indication.
+ *
+ * Userland gives a pointer to an int.  The int is set to a progress
+ * indicator 0-65536, with 65536=100%.
+ *
+ * If the drive does not support format progress indication, we just check
+ * the dsc bit, and return either 0 or 65536.
+ */
 
 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 {
@@ -1552,17 +1232,15 @@ static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 
 	if (floppy->srfp) {
 		idefloppy_create_request_sense_cmd(&pc);
-		if (idefloppy_queue_pc_tail(drive, &pc)) {
+		if (idefloppy_queue_pc_tail(drive, &pc))
 			return (-EIO);
-		}
 
 		if (floppy->sense_key == 2 &&
 		    floppy->asc == 4 &&
-		    floppy->ascq == 4) {
+		    floppy->ascq == 4)
 			progress_indication = floppy->progress_indication;
-		}
-		/* Else assume format_unit has finished, and we're
-		** at 0x10000 */
+
+		/* Else assume format_unit has finished, and we're at 0x10000 */
 	} else {
 		unsigned long flags;
 		u8 stat;
@@ -1579,10 +1257,7 @@ static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 	return (0);
 }
 
-/*
- *	Return the current floppy capacity.
- */
-static sector_t idefloppy_capacity (ide_drive_t *drive)
+static sector_t idefloppy_capacity(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	unsigned long capacity = floppy->blocks * floppy->bs_factor;
@@ -1591,15 +1266,12 @@ static sector_t idefloppy_capacity (ide_drive_t *drive)
 }
 
 /*
- *	idefloppy_identify_device checks if we can support a drive,
- *	based on the ATAPI IDENTIFY command results.
+ * Check whether we can support a drive, based on the ATAPI IDENTIFY command
+ * results.
  */
-static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
+static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
 {
 	struct idefloppy_id_gcw gcw;
-#if IDEFLOPPY_DEBUG_INFO
-	char buffer[80];
-#endif /* IDEFLOPPY_DEBUG_INFO */
 
 	*((u16 *) &gcw) = id->config;
 
@@ -1608,54 +1280,23 @@ static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id)
 	if ((gcw.device_type == 5) &&
 	    !strstr(id->model, "CD-ROM") &&
 	    strstr(id->model, "ZIP"))
-		gcw.device_type = 0;			
+		gcw.device_type = 0;
 #endif
 
-#if IDEFLOPPY_DEBUG_INFO
-	printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n");
-	switch (gcw.protocol) {
-		case 0: case 1: sprintf(buffer, "ATA");break;
-		case 2:	sprintf(buffer, "ATAPI");break;
-		case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break;
-	}
-	printk(KERN_INFO "Protocol Type: %s\n", buffer);
-	switch (gcw.device_type) {
-		case 0: sprintf(buffer, "Direct-access Device");break;
-		case 1: sprintf(buffer, "Streaming Tape Device");break;
-		case 2: case 3: case 4: sprintf (buffer, "Reserved");break;
-		case 5: sprintf(buffer, "CD-ROM Device");break;
-		case 6: sprintf(buffer, "Reserved");
-		case 7: sprintf(buffer, "Optical memory Device");break;
-		case 0x1f: sprintf(buffer, "Unknown or no Device type");break;
-		default: sprintf(buffer, "Reserved");
-	}
-	printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer);
-	printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No");	
-	switch (gcw.drq_type) {
-		case 0: sprintf(buffer, "Microprocessor DRQ");break;
-		case 1: sprintf(buffer, "Interrupt DRQ");break;
-		case 2: sprintf(buffer, "Accelerated DRQ");break;
-		case 3: sprintf(buffer, "Reserved");break;
-	}
-	printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer);
-	switch (gcw.packet_size) {
-		case 0: sprintf(buffer, "12 bytes");break;
-		case 1: sprintf(buffer, "16 bytes");break;
-		default: sprintf(buffer, "Reserved");break;
-	}
-	printk(KERN_INFO "Command Packet Size: %s\n", buffer);
-#endif /* IDEFLOPPY_DEBUG_INFO */
-
 	if (gcw.protocol != 2)
-		printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n");
+		printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
+				gcw.protocol);
 	else if (gcw.device_type != 0)
-		printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n");
+		printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
+				"to floppy\n", gcw.device_type);
 	else if (!gcw.removable)
 		printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
 	else if (gcw.drq_type == 3) {
-		printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type);
+		printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
+				"supported\n", gcw.drq_type);
 	} else if (gcw.packet_size != 0) {
-		printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n");
+		printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
+				"bytes long\n", gcw.packet_size);
 	} else
 		return 1;
 	return 0;
@@ -1666,59 +1307,53 @@ static void idefloppy_add_settings(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 
-/*
- *			drive	setting name	read/write	data type	min	max	mul_factor	div_factor	data pointer		set function
- */
-	ide_add_setting(drive,	"bios_cyl",	SETTING_RW,	TYPE_INT,	0,	1023,		1,		1,	&drive->bios_cyl,	NULL);
-	ide_add_setting(drive,	"bios_head",	SETTING_RW,	TYPE_BYTE,	0,	255,		1,		1,	&drive->bios_head,	NULL);
-	ide_add_setting(drive,	"bios_sect",	SETTING_RW,	TYPE_BYTE,	0,	63,		1,		1,	&drive->bios_sect,	NULL);
-	ide_add_setting(drive,	"ticks",	SETTING_RW,	TYPE_BYTE,	0,	255,		1,		1,	&floppy->ticks,		NULL);
+	ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
+			&drive->bios_cyl, NULL);
+	ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
+			&drive->bios_head, NULL);
+	ide_add_setting(drive, "bios_sect", SETTING_RW,	TYPE_BYTE, 0,  63, 1, 1,
+			&drive->bios_sect, NULL);
+	ide_add_setting(drive, "ticks",	   SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
+			&floppy->ticks,	 NULL);
 }
 #else
 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
 #endif
 
-/*
- *	Driver initialization.
- */
-static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
+static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
 {
 	struct idefloppy_id_gcw gcw;
 
 	*((u16 *) &gcw) = drive->id->config;
 	floppy->pc = floppy->pc_stack;
 	if (gcw.drq_type == 1)
-		set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
 	/*
-	 *	We used to check revisions here. At this point however
-	 *	I'm giving up. Just assume they are all broken, its easier.
+	 * We used to check revisions here. At this point however I'm giving up.
+	 * Just assume they are all broken, its easier.
 	 *
-	 *	The actual reason for the workarounds was likely
-	 *	a driver bug after all rather than a firmware bug,
-	 *	and the workaround below used to hide it. It should
-	 *	be fixed as of version 1.9, but to be on the safe side
-	 *	we'll leave the limitation below for the 2.2.x tree.
+	 * The actual reason for the workarounds was likely a driver bug after
+	 * all rather than a firmware bug, and the workaround below used to hide
+	 * it. It should be fixed as of version 1.9, but to be on the safe side
+	 * we'll leave the limitation below for the 2.2.x tree.
 	 */
-
 	if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
-		set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
 		/* This value will be visible in the /proc/ide/hdx/settings */
 		floppy->ticks = IDEFLOPPY_TICKS_DELAY;
 		blk_queue_max_sectors(drive->queue, 64);
 	}
 
 	/*
-	*      Guess what?  The IOMEGA Clik! drive also needs the
-	*      above fix.  It makes nasty clicking noises without
-	*      it, so please don't remove this.
-	*/
+	 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
+	 * nasty clicking noises without it, so please don't remove this.
+	 */
 	if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
 		blk_queue_max_sectors(drive->queue, 64);
-		set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
 	}
 
-
-	(void) idefloppy_get_capacity(drive);
+	(void) ide_floppy_get_capacity(drive);
 	idefloppy_add_settings(drive);
 }
 
@@ -1734,7 +1369,7 @@ static void ide_floppy_remove(ide_drive_t *drive)
 	ide_floppy_put(floppy);
 }
 
-static void ide_floppy_release(struct kref *kref)
+static void idefloppy_cleanup_obj(struct kref *kref)
 {
 	struct ide_floppy_obj *floppy = to_ide_floppy(kref);
 	ide_drive_t *drive = floppy->drive;
@@ -1747,19 +1382,19 @@ static void ide_floppy_release(struct kref *kref)
 }
 
 #ifdef CONFIG_IDE_PROC_FS
-static int proc_idefloppy_read_capacity
-	(char *page, char **start, off_t off, int count, int *eof, void *data)
+static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
+		int count, int *eof, void *data)
 {
 	ide_drive_t*drive = (ide_drive_t *)data;
 	int len;
 
-	len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
-	PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+	len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
+	PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
 }
 
 static ide_proc_entry_t idefloppy_proc[] = {
-	{ "capacity",	S_IFREG|S_IRUGO,	proc_idefloppy_read_capacity, NULL },
-	{ "geometry",	S_IFREG|S_IRUGO,	proc_ide_read_geometry,	NULL },
+	{ "capacity",	S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,	NULL },
+	{ "geometry",	S_IFREG|S_IRUGO, proc_ide_read_geometry,	NULL },
 	{ NULL, 0, NULL, NULL }
 };
 #endif	/* CONFIG_IDE_PROC_FS */
@@ -1794,9 +1429,10 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 	idefloppy_pc_t pc;
 	int ret = 0;
 
-	debug_log(KERN_INFO "Reached idefloppy_open\n");
+	debug_log("Reached %s\n", __func__);
 
-	if (!(floppy = ide_floppy_get(disk)))
+	floppy = ide_floppy_get(disk);
+	if (!floppy)
 		return -ENXIO;
 
 	drive = floppy->drive;
@@ -1804,7 +1440,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 	floppy->openers++;
 
 	if (floppy->openers == 1) {
-		clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 		/* Just in case */
 
 		idefloppy_create_test_unit_ready_cmd(&pc);
@@ -1813,13 +1449,13 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 			(void) idefloppy_queue_pc_tail(drive, &pc);
 		}
 
-		if (idefloppy_get_capacity (drive)
+		if (ide_floppy_get_capacity(drive)
 		   && (filp->f_flags & O_NDELAY) == 0
 		    /*
-		    ** Allow O_NDELAY to open a drive without a disk, or with
-		    ** an unreadable disk, so that we can get the format
-		    ** capacity of the drive or begin the format - Sam
-		    */
+		     * Allow O_NDELAY to open a drive without a disk, or with an
+		     * unreadable disk, so that we can get the format capacity
+		     * of the drive or begin the format - Sam
+		     */
 		    ) {
 			ret = -EIO;
 			goto out_put_floppy;
@@ -1829,14 +1465,14 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 			ret = -EROFS;
 			goto out_put_floppy;
 		}
-		set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
+		floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
 		/* IOMEGA Clik! drives do not support lock/unlock commands */
-                if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
+		if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
 			idefloppy_create_prevent_cmd(&pc, 1);
 			(void) idefloppy_queue_pc_tail(drive, &pc);
 		}
 		check_disk_change(inode->i_bdev);
-	} else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
+	} else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
 		ret = -EBUSY;
 		goto out_put_floppy;
 	}
@@ -1854,17 +1490,17 @@ static int idefloppy_release(struct inode *inode, struct file *filp)
 	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 	ide_drive_t *drive = floppy->drive;
 	idefloppy_pc_t pc;
-	
-	debug_log(KERN_INFO "Reached idefloppy_release\n");
+
+	debug_log("Reached %s\n", __func__);
 
 	if (floppy->openers == 1) {
 		/* IOMEGA Clik! drives do not support lock/unlock commands */
-                if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
+		if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
 			idefloppy_create_prevent_cmd(&pc, 0);
 			(void) idefloppy_queue_pc_tail(drive, &pc);
 		}
 
-		clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
 	}
 
 	floppy->openers--;
@@ -1885,64 +1521,105 @@ static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
+static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
+			       unsigned long arg, unsigned int cmd)
+{
+	if (floppy->openers > 1)
+		return -EBUSY;
+
+	/* The IOMEGA Clik! Drive doesn't support this command -
+	 * no room for an eject mechanism */
+	if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
+		int prevent = arg ? 1 : 0;
+
+		if (cmd == CDROMEJECT)
+			prevent = 0;
+
+		idefloppy_create_prevent_cmd(pc, prevent);
+		(void) idefloppy_queue_pc_tail(floppy->drive, pc);
+	}
+
+	if (cmd == CDROMEJECT) {
+		idefloppy_create_start_stop_cmd(pc, 2);
+		(void) idefloppy_queue_pc_tail(floppy->drive, pc);
+	}
+
+	return 0;
+}
+
+static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
+				  int __user *arg)
+{
+	int blocks, length, flags, err = 0;
+	idefloppy_pc_t pc;
+
+	if (floppy->openers > 1) {
+		/* Don't format if someone is using the disk */
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
+		return -EBUSY;
+	}
+
+	floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
+
+	/*
+	 * Send ATAPI_FORMAT_UNIT to the drive.
+	 *
+	 * Userland gives us the following structure:
+	 *
+	 * struct idefloppy_format_command {
+	 *        int nblocks;
+	 *        int blocksize;
+	 *        int flags;
+	 *        } ;
+	 *
+	 * flags is a bitmask, currently, the only defined flag is:
+	 *
+	 *        0x01 - verify media after format.
+	 */
+	if (get_user(blocks, arg) ||
+			get_user(length, arg+1) ||
+			get_user(flags, arg+2)) {
+		err = -EFAULT;
+		goto out;
+	}
+
+	(void) idefloppy_get_sfrp_bit(floppy->drive);
+	idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
+
+	if (idefloppy_queue_pc_tail(floppy->drive, &pc))
+		err = -EIO;
+
+out:
+	if (err)
+		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
+	return err;
+}
+
+
 static int idefloppy_ioctl(struct inode *inode, struct file *file,
 			unsigned int cmd, unsigned long arg)
 {
 	struct block_device *bdev = inode->i_bdev;
 	struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
 	ide_drive_t *drive = floppy->drive;
+	idefloppy_pc_t pc;
 	void __user *argp = (void __user *)arg;
 	int err;
-	int prevent = (arg) ? 1 : 0;
-	idefloppy_pc_t pc;
 
 	switch (cmd) {
 	case CDROMEJECT:
-		prevent = 0;
 		/* fall through */
 	case CDROM_LOCKDOOR:
-		if (floppy->openers > 1)
-			return -EBUSY;
-
-		/* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */
-                if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
-			idefloppy_create_prevent_cmd(&pc, prevent);
-			(void) idefloppy_queue_pc_tail(drive, &pc);
-		}
-		if (cmd == CDROMEJECT) {
-			idefloppy_create_start_stop_cmd(&pc, 2);
-			(void) idefloppy_queue_pc_tail(drive, &pc);
-		}
-		return 0;
+		return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
 	case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
 		return 0;
 	case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
-		return idefloppy_get_format_capacities(drive, argp);
+		return ide_floppy_get_format_capacities(drive, argp);
 	case IDEFLOPPY_IOCTL_FORMAT_START:
-
 		if (!(file->f_mode & 2))
 			return -EPERM;
 
-		if (floppy->openers > 1) {
-			/* Don't format if someone is using the disk */
-
-			clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS,
-				  &floppy->flags);
-			return -EBUSY;
-		}
-
-		set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
-
-		err = idefloppy_begin_format(drive, argp);
-		if (err)
-			clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
-		return err;
-		/*
-		** Note, the bit will be cleared when the device is
-		** closed.  This is the cleanest way to handle the
-		** situation where the drive does not support
-		** format progress reporting.
-		*/
+		return ide_floppy_format_unit(floppy, (int __user *)arg);
 	case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
 		return idefloppy_get_format_progress(drive, argp);
 	}
@@ -1967,13 +1644,16 @@ static int idefloppy_media_changed(struct gendisk *disk)
 {
 	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 	ide_drive_t *drive = floppy->drive;
+	int ret;
 
 	/* do not scan partitions twice if this is a removable device */
 	if (drive->attach) {
 		drive->attach = 0;
 		return 0;
 	}
-	return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
+	ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
+	floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
+	return ret;
 }
 
 static int idefloppy_revalidate_disk(struct gendisk *disk)
@@ -2004,16 +1684,20 @@ static int ide_floppy_probe(ide_drive_t *drive)
 		goto failed;
 	if (drive->media != ide_floppy)
 		goto failed;
-	if (!idefloppy_identify_device (drive, drive->id)) {
-		printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
+	if (!idefloppy_identify_device(drive, drive->id)) {
+		printk(KERN_ERR "ide-floppy: %s: not supported by this version"
+				" of ide-floppy\n", drive->name);
 		goto failed;
 	}
 	if (drive->scsi) {
-		printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
+		printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
+				" emulation.\n", drive->name);
 		goto failed;
 	}
-	if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
-		printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
+	floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
+	if (!floppy) {
+		printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
+				" structure\n", drive->name);
 		goto failed;
 	}
 
@@ -2035,7 +1719,7 @@ static int ide_floppy_probe(ide_drive_t *drive)
 
 	drive->driver_data = floppy;
 
-	idefloppy_setup (drive, floppy);
+	idefloppy_setup(drive, floppy);
 
 	g->minors = 1 << PARTN_BITS;
 	g->driverfs_dev = &drive->gendev;
@@ -2051,9 +1735,7 @@ failed:
 	return -ENODEV;
 }
 
-MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
-
-static void __exit idefloppy_exit (void)
+static void __exit idefloppy_exit(void)
 {
 	driver_unregister(&idefloppy_driver.gen_driver);
 }
@@ -2068,3 +1750,5 @@ MODULE_ALIAS("ide:*m-floppy*");
 module_init(idefloppy_init);
 module_exit(idefloppy_exit);
 MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
+
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index bb30c29..be469db 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -23,7 +23,7 @@ static int __init ide_generic_init(void)
 	for (i = 0; i < MAX_HWIFS; i++)
 		idx[i] = ide_hwifs[i].present ? 0xff : i;
 
-	ide_device_add_all(idx);
+	ide_device_add_all(idx, NULL);
 
 	if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET])
 		ide_release_lock();	/* for atari only */
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 16b1f6e..a95178f 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -163,8 +163,6 @@ void SELECT_DRIVE (ide_drive_t *drive)
 	HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG);
 }
 
-EXPORT_SYMBOL(SELECT_DRIVE);
-
 void SELECT_MASK (ide_drive_t *drive, int mask)
 {
 	if (HWIF(drive)->maskproc)
@@ -614,66 +612,6 @@ no_80w:
 	return 0;
 }
 
-int ide_ata66_check (ide_drive_t *drive, ide_task_t *args)
-{
-	if (args->tf.command == WIN_SETFEATURES &&
-	    args->tf.nsect > XFER_UDMA_2 &&
-	    args->tf.feature == SETFEATURES_XFER) {
-		if (eighty_ninty_three(drive) == 0) {
-			printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
-					    "be set\n", drive->name);
-			return 1;
-		}
-	}
-
-	return 0;
-}
-
-/*
- * Backside of HDIO_DRIVE_CMD call of SETFEATURES_XFER.
- * 1 : Safe to update drive->id DMA registers.
- * 0 : OOPs not allowed.
- */
-int set_transfer (ide_drive_t *drive, ide_task_t *args)
-{
-	if (args->tf.command == WIN_SETFEATURES &&
-	    args->tf.nsect >= XFER_SW_DMA_0 &&
-	    args->tf.feature == SETFEATURES_XFER &&
-	    (drive->id->dma_ultra ||
-	     drive->id->dma_mword ||
-	     drive->id->dma_1word))
-		return 1;
-
-	return 0;
-}
-
-#ifdef CONFIG_BLK_DEV_IDEDMA
-static u8 ide_auto_reduce_xfer (ide_drive_t *drive)
-{
-	if (!drive->crc_count)
-		return drive->current_speed;
-	drive->crc_count = 0;
-
-	switch(drive->current_speed) {
-		case XFER_UDMA_7:	return XFER_UDMA_6;
-		case XFER_UDMA_6:	return XFER_UDMA_5;
-		case XFER_UDMA_5:	return XFER_UDMA_4;
-		case XFER_UDMA_4:	return XFER_UDMA_3;
-		case XFER_UDMA_3:	return XFER_UDMA_2;
-		case XFER_UDMA_2:	return XFER_UDMA_1;
-		case XFER_UDMA_1:	return XFER_UDMA_0;
-			/*
-			 * OOPS we do not goto non Ultra DMA modes
-			 * without iCRC's available we force
-			 * the system to PIO and make the user
-			 * invoke the ATA-1 ATA-2 DMA modes.
-			 */
-		case XFER_UDMA_0:
-		default:		return XFER_PIO_4;
-	}
-}
-#endif /* CONFIG_BLK_DEV_IDEDMA */
-
 int ide_driveid_update(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
@@ -882,22 +820,17 @@ void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
 	unsigned long flags;
 	ide_hwgroup_t *hwgroup = HWGROUP(drive);
 	ide_hwif_t *hwif = HWIF(drive);
-	
+
 	spin_lock_irqsave(&ide_lock, flags);
-	
 	BUG_ON(hwgroup->handler);
-	hwgroup->handler	= handler;
-	hwgroup->expiry		= expiry;
-	hwgroup->timer.expires	= jiffies + timeout;
-	hwgroup->req_gen_timer = hwgroup->req_gen;
-	add_timer(&hwgroup->timer);
+	__ide_set_handler(drive, handler, timeout, expiry);
 	hwif->OUTBSYNC(drive, cmd, IDE_COMMAND_REG);
-	/* Drive takes 400nS to respond, we must avoid the IRQ being
-	   serviced before that. 
-	   
-	   FIXME: we could skip this delay with care on non shared
-	   devices 
-	*/
+	/*
+	 * Drive takes 400nS to respond, we must avoid the IRQ being
+	 * serviced before that.
+	 *
+	 * FIXME: we could skip this delay with care on non shared devices
+	 */
 	ndelay(400);
 	spin_unlock_irqrestore(&ide_lock, flags);
 }
@@ -1005,19 +938,6 @@ static ide_startstop_t reset_pollfunc (ide_drive_t *drive)
 	return ide_stopped;
 }
 
-static void check_dma_crc(ide_drive_t *drive)
-{
-#ifdef CONFIG_BLK_DEV_IDEDMA
-	if (drive->crc_count) {
-		ide_dma_off_quietly(drive);
-		ide_set_xfer_rate(drive, ide_auto_reduce_xfer(drive));
-		if (drive->current_speed >= XFER_SW_DMA_0)
-			ide_dma_on(drive);
-	} else
-		ide_dma_off(drive);
-#endif
-}
-
 static void ide_disk_pre_reset(ide_drive_t *drive)
 {
 	int legacy = (drive->id->cfs_enable_2 & 0x0400) ? 0 : 1;
@@ -1039,17 +959,20 @@ static void pre_reset(ide_drive_t *drive)
 	else
 		drive->post_reset = 1;
 
+	if (drive->using_dma) {
+		if (drive->crc_count)
+			ide_check_dma_crc(drive);
+		else
+			ide_dma_off(drive);
+	}
+
 	if (!drive->keep_settings) {
-		if (drive->using_dma) {
-			check_dma_crc(drive);
-		} else {
+		if (!drive->using_dma) {
 			drive->unmask = 0;
 			drive->io_32bit = 0;
 		}
 		return;
 	}
-	if (drive->using_dma)
-		check_dma_crc(drive);
 
 	if (HWIF(drive)->pre_reset != NULL)
 		HWIF(drive)->pre_reset(drive);
diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
index 4bda5cf..b163b2e 100644
--- a/drivers/ide/ide-pnp.c
+++ b/drivers/ide/ide-pnp.c
@@ -49,7 +49,7 @@ static int idepnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id
 		printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
 		pnp_set_drvdata(dev,hwif);
 
-		ide_device_add(idx);
+		ide_device_add(idx, NULL);
 
 		return 0;
 	}
@@ -60,9 +60,10 @@ static int idepnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id
 static void idepnp_remove(struct pnp_dev * dev)
 {
 	ide_hwif_t *hwif = pnp_get_drvdata(dev);
-	if (hwif) {
-		ide_unregister(hwif->index);
-	} else
+
+	if (hwif)
+		ide_unregister(hwif->index, 0, 0);
+	else
 		printk(KERN_ERR "idepnp: Unable to remove device, please report.\n");
 }
 
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 98a8af4..9c07bdb 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -423,8 +423,9 @@ static int ide_busy_sleep(ide_hwif_t *hwif)
 
 static int do_probe (ide_drive_t *drive, u8 cmd)
 {
-	int rc;
 	ide_hwif_t *hwif = HWIF(drive);
+	int rc;
+	u8 stat;
 
 	if (drive->present) {
 		/* avoid waiting for inappropriate probes */
@@ -461,15 +462,17 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 			/* failed: try again */
 			rc = try_to_identify(drive,cmd);
 		}
-		if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT))
+
+		stat = hwif->INB(IDE_STATUS_REG);
+
+		if (stat == (BUSY_STAT | READY_STAT))
 			return 4;
 
 		if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
 			((drive->autotune == IDE_TUNE_DEFAULT) ||
 			(drive->autotune == IDE_TUNE_AUTO))) {
-			printk("%s: no response (status = 0x%02x), "
-				"resetting drive\n", drive->name,
-				hwif->INB(IDE_STATUS_REG));
+			printk(KERN_ERR "%s: no response (status = 0x%02x), "
+					"resetting drive\n", drive->name, stat);
 			msleep(50);
 			hwif->OUTB(drive->select.all, IDE_SELECT_REG);
 			msleep(50);
@@ -477,11 +480,13 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 			(void)ide_busy_sleep(hwif);
 			rc = try_to_identify(drive, cmd);
 		}
+
+		/* ensure drive IRQ is clear */
+		stat = hwif->INB(IDE_STATUS_REG);
+
 		if (rc == 1)
-			printk("%s: no response (status = 0x%02x)\n",
-				drive->name, hwif->INB(IDE_STATUS_REG));
-		/* ensure drive irq is clear */
-		(void) hwif->INB(IDE_STATUS_REG);
+			printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
+					drive->name, stat);
 	} else {
 		/* not present or maybe ATAPI */
 		rc = 3;
@@ -502,6 +507,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 static void enable_nest (ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = HWIF(drive);
+	u8 stat;
 
 	printk("%s: enabling %s -- ", hwif->name, drive->id->model);
 	SELECT_DRIVE(drive);
@@ -515,11 +521,12 @@ static void enable_nest (ide_drive_t *drive)
 
 	msleep(50);
 
-	if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) {
-		printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG));
-	} else {
-		printk("success\n");
-	}
+	stat = hwif->INB(IDE_STATUS_REG);
+
+	if (!OK_STAT(stat, 0, BAD_STAT))
+		printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
+	else
+		printk(KERN_CONT "success\n");
 
 	/* if !(success||timed-out) */
 	if (do_probe(drive, WIN_IDENTIFY) >= 2) {
@@ -822,7 +829,7 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
 	for (unit = 0; unit < MAX_DRIVES; ++unit) {
 		ide_drive_t *drive = &hwif->drives[unit];
 
-		if (hwif->no_io_32bit)
+		if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
 			drive->no_io_32bit = 1;
 		else
 			drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
@@ -881,13 +888,6 @@ static int ide_init_queue(ide_drive_t *drive)
 	q->queuedata = drive;
 	blk_queue_segment_boundary(q, 0xffff);
 
-	if (!hwif->rqsize) {
-		if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
-		    (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
-			hwif->rqsize = 256;
-		else
-			hwif->rqsize = 65536;
-	}
 	if (hwif->rqsize < max_sectors)
 		max_sectors = hwif->rqsize;
 	blk_queue_max_sectors(q, max_sectors);
@@ -918,6 +918,48 @@ static int ide_init_queue(ide_drive_t *drive)
 	return 0;
 }
 
+static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
+{
+	ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
+
+	spin_lock_irq(&ide_lock);
+	if (!hwgroup->drive) {
+		/* first drive for hwgroup. */
+		drive->next = drive;
+		hwgroup->drive = drive;
+		hwgroup->hwif = HWIF(hwgroup->drive);
+	} else {
+		drive->next = hwgroup->drive->next;
+		hwgroup->drive->next = drive;
+	}
+	spin_unlock_irq(&ide_lock);
+}
+
+/*
+ * For any present drive:
+ * - allocate the block device queue
+ * - link drive into the hwgroup
+ */
+static void ide_port_setup_devices(ide_hwif_t *hwif)
+{
+	int i;
+
+	for (i = 0; i < MAX_DRIVES; i++) {
+		ide_drive_t *drive = &hwif->drives[i];
+
+		if (!drive->present)
+			continue;
+
+		if (ide_init_queue(drive)) {
+			printk(KERN_ERR "ide: failed to init %s\n",
+					drive->name);
+			continue;
+		}
+
+		ide_add_drive_to_hwgroup(drive);
+	}
+}
+
 /*
  * This routine sets up the irq for an ide interface, and creates a new
  * hwgroup for the irq/hwif if none was previously assigned.
@@ -1019,30 +1061,12 @@ static int init_irq (ide_hwif_t *hwif)
 	       		goto out_unlink;
 	}
 
-	/*
-	 * For any present drive:
-	 * - allocate the block device queue
-	 * - link drive into the hwgroup
-	 */
-	for (index = 0; index < MAX_DRIVES; ++index) {
-		ide_drive_t *drive = &hwif->drives[index];
-		if (!drive->present)
-			continue;
-		if (ide_init_queue(drive)) {
-			printk(KERN_ERR "ide: failed to init %s\n",drive->name);
-			continue;
-		}
-		spin_lock_irq(&ide_lock);
-		if (!hwgroup->drive) {
-			/* first drive for hwgroup. */
-			drive->next = drive;
-			hwgroup->drive = drive;
-			hwgroup->hwif = HWIF(hwgroup->drive);
-		} else {
-			drive->next = hwgroup->drive->next;
-			hwgroup->drive->next = drive;
-		}
-		spin_unlock_irq(&ide_lock);
+	if (!hwif->rqsize) {
+		if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
+		    (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
+			hwif->rqsize = 256;
+		else
+			hwif->rqsize = 65536;
 	}
 
 #if !defined(__mc68000__) && !defined(CONFIG_APUS)
@@ -1058,6 +1082,9 @@ static int init_irq (ide_hwif_t *hwif)
 		printk(" (%sed with %s)",
 			hwif->sharing_irq ? "shar" : "serializ", match->name);
 	printk("\n");
+
+	ide_port_setup_devices(hwif);
+
 	mutex_unlock(&ide_cfg_mtx);
 	return 0;
 out_unlink:
@@ -1182,30 +1209,6 @@ static void drive_release_dev (struct device *dev)
 	complete(&drive->gendev_rel_comp);
 }
 
-/*
- * init_gendisk() (as opposed to ide_geninit) is called for each major device,
- * after probing for drives, to allocate partition tables and other data
- * structures needed for the routines in genhd.c.  ide_geninit() gets called
- * somewhat later, during the partition check.
- */
-static void init_gendisk (ide_hwif_t *hwif)
-{
-	unsigned int unit;
-
-	for (unit = 0; unit < MAX_DRIVES; ++unit) {
-		ide_drive_t * drive = &hwif->drives[unit];
-		ide_add_generic_settings(drive);
-		snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u",
-			 hwif->index,unit);
-		drive->gendev.parent = &hwif->gendev;
-		drive->gendev.bus = &ide_bus_type;
-		drive->gendev.driver_data = drive;
-		drive->gendev.release = drive_release_dev;
-	}
-	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
-			THIS_MODULE, ata_probe, ata_lock, hwif);
-}
-
 static int hwif_init(ide_hwif_t *hwif)
 {
 	int old_irq;
@@ -1262,8 +1265,8 @@ static int hwif_init(ide_hwif_t *hwif)
 		hwif->name, hwif->irq);
 
 done:
-	init_gendisk(hwif);
-	ide_acpi_init(hwif);
+	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
+			    THIS_MODULE, ata_probe, ata_lock, hwif);
 	return 1;
 
 out:
@@ -1277,24 +1280,119 @@ static void hwif_register_devices(ide_hwif_t *hwif)
 
 	for (i = 0; i < MAX_DRIVES; i++) {
 		ide_drive_t *drive = &hwif->drives[i];
+		struct device *dev = &drive->gendev;
+		int ret;
 
-		if (drive->present) {
-			int ret = device_register(&drive->gendev);
+		if (!drive->present)
+			continue;
 
-			if (ret < 0)
-				printk(KERN_WARNING "IDE: %s: "
-					"device_register error: %d\n",
-					__FUNCTION__, ret);
-		}
+		ide_add_generic_settings(drive);
+
+		snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
+		dev->parent = &hwif->gendev;
+		dev->bus = &ide_bus_type;
+		dev->driver_data = drive;
+		dev->release = drive_release_dev;
+
+		ret = device_register(dev);
+		if (ret < 0)
+			printk(KERN_WARNING "IDE: %s: device_register error: "
+					    "%d\n", __func__, ret);
+	}
+}
+
+static void ide_port_init_devices(ide_hwif_t *hwif)
+{
+	int i;
+
+	for (i = 0; i < MAX_DRIVES; i++) {
+		ide_drive_t *drive = &hwif->drives[i];
+
+		if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
+			drive->io_32bit = 1;
+		if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
+			drive->unmask = 1;
+		if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
+			drive->no_unmask = 1;
+		if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0)
+			drive->autotune = 1;
+	}
+
+	if (hwif->port_init_devs)
+		hwif->port_init_devs(hwif);
+}
+
+static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
+			  const struct ide_port_info *d)
+{
+	if (d->chipset != ide_etrax100)
+		hwif->channel = port;
+
+	if (d->chipset)
+		hwif->chipset = d->chipset;
+
+	if (d->init_iops)
+		d->init_iops(hwif);
+
+	if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
+		ide_hwif_setup_dma(hwif, d);
+
+	if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
+	    (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
+		hwif->irq = port ? 15 : 14;
+
+	hwif->host_flags = d->host_flags;
+	hwif->pio_mask = d->pio_mask;
+
+	if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
+		hwif->mate->serialized = hwif->serialized = 1;
+
+	hwif->swdma_mask = d->swdma_mask;
+	hwif->mwdma_mask = d->mwdma_mask;
+	hwif->ultra_mask = d->udma_mask;
+
+	/* reset DMA masks only for SFF-style DMA controllers */
+	if ((d->host_flags && IDE_HFLAG_NO_DMA) == 0 && hwif->dma_base == 0)
+		hwif->swdma_mask = hwif->mwdma_mask = hwif->ultra_mask = 0;
+
+	if (d->host_flags & IDE_HFLAG_RQSIZE_256)
+		hwif->rqsize = 256;
+
+	/* call chipset specific routine for each enabled port */
+	if (d->init_hwif)
+		d->init_hwif(hwif);
+
+	if (hwif->cable_detect && (hwif->ultra_mask & 0x78)) {
+		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
+			hwif->cbl = hwif->cable_detect(hwif);
 	}
 }
 
-int ide_device_add_all(u8 *idx)
+int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
 {
-	ide_hwif_t *hwif;
+	ide_hwif_t *hwif, *mate = NULL;
 	int i, rc = 0;
 
 	for (i = 0; i < MAX_HWIFS; i++) {
+		if (d == NULL || idx[i] == 0xff) {
+			mate = NULL;
+			continue;
+		}
+
+		hwif = &ide_hwifs[idx[i]];
+
+		if (d->chipset != ide_etrax100 && (i & 1) && mate) {
+			hwif->mate = mate;
+			mate->mate = hwif;
+		}
+
+		mate = (i & 1) ? NULL : hwif;
+
+		ide_init_port(hwif, i & 1, d);
+		ide_port_init_devices(hwif);
+	}
+
+	for (i = 0; i < MAX_HWIFS; i++) {
 		if (idx[i] == 0xff)
 			continue;
 
@@ -1337,6 +1435,9 @@ int ide_device_add_all(u8 *idx)
 			rc = -1;
 			continue;
 		}
+
+		ide_acpi_init(hwif);
+		ide_acpi_port_init_devices(hwif);
 	}
 
 	for (i = 0; i < MAX_HWIFS; i++) {
@@ -1354,15 +1455,22 @@ int ide_device_add_all(u8 *idx)
 	}
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		if (idx[i] != 0xff)
-			ide_proc_register_port(&ide_hwifs[idx[i]]);
+		if (idx[i] == 0xff)
+			continue;
+
+		hwif = &ide_hwifs[idx[i]];
+
+		if (hwif->present) {
+			ide_proc_register_port(hwif);
+			ide_proc_port_register_devices(hwif);
+		}
 	}
 
 	return rc;
 }
 EXPORT_SYMBOL_GPL(ide_device_add_all);
 
-int ide_device_add(u8 idx[4])
+int ide_device_add(u8 idx[4], const struct ide_port_info *d)
 {
 	u8 idx_all[MAX_HWIFS];
 	int i;
@@ -1370,6 +1478,6 @@ int ide_device_add(u8 idx[4])
 	for (i = 0; i < MAX_HWIFS; i++)
 		idx_all[i] = (i < 4) ? idx[i] : 0xff;
 
-	return ide_device_add_all(idx_all);
+	return ide_device_add_all(idx_all, d);
 }
 EXPORT_SYMBOL_GPL(ide_device_add);
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index 00c249c..975c0ff 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -739,7 +739,7 @@ void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver)
 
 EXPORT_SYMBOL(ide_proc_unregister_driver);
 
-static void create_proc_ide_drives(ide_hwif_t *hwif)
+void ide_proc_port_register_devices(ide_hwif_t *hwif)
 {
 	int	d;
 	struct proc_dir_entry *ent;
@@ -793,9 +793,6 @@ static ide_proc_entry_t hwif_entries[] = {
 
 void ide_proc_register_port(ide_hwif_t *hwif)
 {
-	if (!hwif->present)
-		return;
-
 	if (!hwif->proc) {
 		hwif->proc = proc_mkdir(hwif->name, proc_ide_root);
 
@@ -804,8 +801,6 @@ void ide_proc_register_port(ide_hwif_t *hwif)
 
 		ide_add_proc_entries(hwif->proc, hwif_entries, hwif);
 	}
-
-	create_proc_ide_drives(hwif);
 }
 
 #ifdef CONFIG_BLK_DEV_IDEPCI
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 5aef63a..bf40d8c 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1,424 +1,18 @@
 /*
+ * IDE ATAPI streaming tape driver.
+ *
  * Copyright (C) 1995-1999  Gadi Oxman <gadio@netvision.net.il>
  * Copyright (C) 2003-2005  Bartlomiej Zolnierkiewicz
  *
- * $Header$
- *
  * This driver was constructed as a student project in the software laboratory
  * of the faculty of electrical engineering in the Technion - Israel's
  * Institute Of Technology, with the guide of Avner Lottem and Dr. Ilana David.
  *
  * It is hereby placed under the terms of the GNU general public license.
  * (See linux/COPYING).
- */
- 
-/*
- * IDE ATAPI streaming tape driver.
- *
- * This driver is a part of the Linux ide driver and works in co-operation
- * with linux/drivers/block/ide.c.
- *
- * The driver, in co-operation with ide.c, basically traverses the 
- * request-list for the block device interface. The character device
- * interface, on the other hand, creates new requests, adds them
- * to the request-list of the block device, and waits for their completion.
- *
- * Pipelined operation mode is now supported on both reads and writes.
- *
- * The block device major and minor numbers are determined from the
- * tape's relative position in the ide interfaces, as explained in ide.c.
- *
- * The character device interface consists of the following devices:
- *
- * ht0		major 37, minor 0	first  IDE tape, rewind on close.
- * ht1		major 37, minor 1	second IDE tape, rewind on close.
- * ...
- * nht0		major 37, minor 128	first  IDE tape, no rewind on close.
- * nht1		major 37, minor 129	second IDE tape, no rewind on close.
- * ...
- *
- * Run linux/scripts/MAKEDEV.ide to create the above entries.
- *
- * The general magnetic tape commands compatible interface, as defined by
- * include/linux/mtio.h, is accessible through the character device.
- *
- * General ide driver configuration options, such as the interrupt-unmask
- * flag, can be configured by issuing an ioctl to the block device interface,
- * as any other ide device.
- *
- * Our own ide-tape ioctl's can be issued to either the block device or
- * the character device interface.
- *
- * Maximal throughput with minimal bus load will usually be achieved in the
- * following scenario:
- *
- *	1.	ide-tape is operating in the pipelined operation mode.
- *	2.	No buffering is performed by the user backup program.
- *
- * Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
- * 
- * Ver 0.1   Nov  1 95   Pre-working code :-)
- * Ver 0.2   Nov 23 95   A short backup (few megabytes) and restore procedure
- *                        was successful ! (Using tar cvf ... on the block
- *                        device interface).
- *                       A longer backup resulted in major swapping, bad
- *                        overall Linux performance and eventually failed as
- *                        we received non serial read-ahead requests from the
- *                        buffer cache.
- * Ver 0.3   Nov 28 95   Long backups are now possible, thanks to the
- *                        character device interface. Linux's responsiveness
- *                        and performance doesn't seem to be much affected
- *                        from the background backup procedure.
- *                       Some general mtio.h magnetic tape operations are
- *                        now supported by our character device. As a result,
- *                        popular tape utilities are starting to work with
- *                        ide tapes :-)
- *                       The following configurations were tested:
- *                       	1. An IDE ATAPI TAPE shares the same interface
- *                       	   and irq with an IDE ATAPI CDROM.
- *                        	2. An IDE ATAPI TAPE shares the same interface
- *                          	   and irq with a normal IDE disk.
- *                        Both configurations seemed to work just fine !
- *                        However, to be on the safe side, it is meanwhile
- *                        recommended to give the IDE TAPE its own interface
- *                        and irq.
- *                       The one thing which needs to be done here is to
- *                        add a "request postpone" feature to ide.c,
- *                        so that we won't have to wait for the tape to finish
- *                        performing a long media access (DSC) request (such
- *                        as a rewind) before we can access the other device
- *                        on the same interface. This effect doesn't disturb
- *                        normal operation most of the time because read/write
- *                        requests are relatively fast, and once we are
- *                        performing one tape r/w request, a lot of requests
- *                        from the other device can be queued and ide.c will
- *			  service all of them after this single tape request.
- * Ver 1.0   Dec 11 95   Integrated into Linux 1.3.46 development tree.
- *                       On each read / write request, we now ask the drive
- *                        if we can transfer a constant number of bytes
- *                        (a parameter of the drive) only to its buffers,
- *                        without causing actual media access. If we can't,
- *                        we just wait until we can by polling the DSC bit.
- *                        This ensures that while we are not transferring
- *                        more bytes than the constant referred to above, the
- *                        interrupt latency will not become too high and
- *                        we won't cause an interrupt timeout, as happened
- *                        occasionally in the previous version.
- *                       While polling for DSC, the current request is
- *                        postponed and ide.c is free to handle requests from
- *                        the other device. This is handled transparently to
- *                        ide.c. The hwgroup locking method which was used
- *                        in the previous version was removed.
- *                       Use of new general features which are provided by
- *                        ide.c for use with atapi devices.
- *                        (Programming done by Mark Lord)
- *                       Few potential bug fixes (Again, suggested by Mark)
- *                       Single character device data transfers are now
- *                        not limited in size, as they were before.
- *                       We are asking the tape about its recommended
- *                        transfer unit and send a larger data transfer
- *                        as several transfers of the above size.
- *                        For best results, use an integral number of this
- *                        basic unit (which is shown during driver
- *                        initialization). I will soon add an ioctl to get
- *                        this important parameter.
- *                       Our data transfer buffer is allocated on startup,
- *                        rather than before each data transfer. This should
- *                        ensure that we will indeed have a data buffer.
- * Ver 1.1   Dec 14 95   Fixed random problems which occurred when the tape
- *                        shared an interface with another device.
- *                        (poll_for_dsc was a complete mess).
- *                       Removed some old (non-active) code which had
- *                        to do with supporting buffer cache originated
- *                        requests.
- *                       The block device interface can now be opened, so
- *                        that general ide driver features like the unmask
- *                        interrupts flag can be selected with an ioctl.
- *                        This is the only use of the block device interface.
- *                       New fast pipelined operation mode (currently only on
- *                        writes). When using the pipelined mode, the
- *                        throughput can potentially reach the maximum
- *                        tape supported throughput, regardless of the
- *                        user backup program. On my tape drive, it sometimes
- *                        boosted performance by a factor of 2. Pipelined
- *                        mode is enabled by default, but since it has a few
- *                        downfalls as well, you may want to disable it.
- *                        A short explanation of the pipelined operation mode
- *                        is available below.
- * Ver 1.2   Jan  1 96   Eliminated pipelined mode race condition.
- *                       Added pipeline read mode. As a result, restores
- *                        are now as fast as backups.
- *                       Optimized shared interface behavior. The new behavior
- *                        typically results in better IDE bus efficiency and
- *                        higher tape throughput.
- *                       Pre-calculation of the expected read/write request
- *                        service time, based on the tape's parameters. In
- *                        the pipelined operation mode, this allows us to
- *                        adjust our polling frequency to a much lower value,
- *                        and thus to dramatically reduce our load on Linux,
- *                        without any decrease in performance.
- *                       Implemented additional mtio.h operations.
- *                       The recommended user block size is returned by
- *                        the MTIOCGET ioctl.
- *                       Additional minor changes.
- * Ver 1.3   Feb  9 96   Fixed pipelined read mode bug which prevented the
- *                        use of some block sizes during a restore procedure.
- *                       The character device interface will now present a
- *                        continuous view of the media - any mix of block sizes
- *                        during a backup/restore procedure is supported. The
- *                        driver will buffer the requests internally and
- *                        convert them to the tape's recommended transfer
- *                        unit, making performance almost independent of the
- *                        chosen user block size.
- *                       Some improvements in error recovery.
- *                       By cooperating with ide-dma.c, bus mastering DMA can
- *                        now sometimes be used with IDE tape drives as well.
- *                        Bus mastering DMA has the potential to dramatically
- *                        reduce the CPU's overhead when accessing the device,
- *                        and can be enabled by using hdparm -d1 on the tape's
- *                        block device interface. For more info, read the
- *                        comments in ide-dma.c.
- * Ver 1.4   Mar 13 96   Fixed serialize support.
- * Ver 1.5   Apr 12 96   Fixed shared interface operation, broken in 1.3.85.
- *                       Fixed pipelined read mode inefficiency.
- *                       Fixed nasty null dereferencing bug.
- * Ver 1.6   Aug 16 96   Fixed FPU usage in the driver.
- *                       Fixed end of media bug.
- * Ver 1.7   Sep 10 96   Minor changes for the CONNER CTT8000-A model.
- * Ver 1.8   Sep 26 96   Attempt to find a better balance between good
- *                        interactive response and high system throughput.
- * Ver 1.9   Nov  5 96   Automatically cross encountered filemarks rather
- *                        than requiring an explicit FSF command.
- *                       Abort pending requests at end of media.
- *                       MTTELL was sometimes returning incorrect results.
- *                       Return the real block size in the MTIOCGET ioctl.
- *                       Some error recovery bug fixes.
- * Ver 1.10  Nov  5 96   Major reorganization.
- *                       Reduced CPU overhead a bit by eliminating internal
- *                        bounce buffers.
- *                       Added module support.
- *                       Added multiple tape drives support.
- *                       Added partition support.
- *                       Rewrote DSC handling.
- *                       Some portability fixes.
- *                       Removed ide-tape.h.
- *                       Additional minor changes.
- * Ver 1.11  Dec  2 96   Bug fix in previous DSC timeout handling.
- *                       Use ide_stall_queue() for DSC overlap.
- *                       Use the maximum speed rather than the current speed
- *                        to compute the request service time.
- * Ver 1.12  Dec  7 97   Fix random memory overwriting and/or last block data
- *                        corruption, which could occur if the total number
- *                        of bytes written to the tape was not an integral
- *                        number of tape blocks.
- *                       Add support for INTERRUPT DRQ devices.
- * Ver 1.13  Jan  2 98   Add "speed == 0" work-around for HP COLORADO 5GB
- * Ver 1.14  Dec 30 98   Partial fixes for the Sony/AIWA tape drives.
- *                       Replace cli()/sti() with hwgroup spinlocks.
- * Ver 1.15  Mar 25 99   Fix SMP race condition by replacing hwgroup
- *                        spinlock with private per-tape spinlock.
- * Ver 1.16  Sep  1 99   Add OnStream tape support.
- *                       Abort read pipeline on EOD.
- *                       Wait for the tape to become ready in case it returns
- *                        "in the process of becoming ready" on open().
- *                       Fix zero padding of the last written block in
- *                        case the tape block size is larger than PAGE_SIZE.
- *                       Decrease the default disconnection time to tn.
- * Ver 1.16e Oct  3 99   Minor fixes.
- * Ver 1.16e1 Oct 13 99  Patches by Arnold Niessen,
- *                          niessen@iae.nl / arnold.niessen@philips.com
- *                   GO-1)  Undefined code in idetape_read_position
- *				according to Gadi's email
- *                   AJN-1) Minor fix asc == 11 should be asc == 0x11
- *                               in idetape_issue_packet_command (did effect
- *                               debugging output only)
- *                   AJN-2) Added more debugging output, and
- *                              added ide-tape: where missing. I would also
- *				like to add tape->name where possible
- *                   AJN-3) Added different debug_level's 
- *                              via /proc/ide/hdc/settings
- * 				"debug_level" determines amount of debugging output;
- * 				can be changed using /proc/ide/hdx/settings
- * 				0 : almost no debugging output
- * 				1 : 0+output errors only
- * 				2 : 1+output all sensekey/asc
- * 				3 : 2+follow all chrdev related procedures
- * 				4 : 3+follow all procedures
- * 				5 : 4+include pc_stack rq_stack info
- * 				6 : 5+USE_COUNT updates
- *                   AJN-4) Fixed timeout for retension in idetape_queue_pc_tail
- *				from 5 to 10 minutes
- *                   AJN-5) Changed maximum number of blocks to skip when
- *                              reading tapes with multiple consecutive write
- *                              errors from 100 to 1000 in idetape_get_logical_blk
- *                   Proposed changes to code:
- *                   1) output "logical_blk_num" via /proc
- *                   2) output "current_operation" via /proc
- *                   3) Either solve or document the fact that `mt rewind' is
- *                      required after reading from /dev/nhtx to be
- *			able to rmmod the idetape module;
- *			Also, sometimes an application finishes but the
- *			device remains `busy' for some time. Same cause ?
- *                   Proposed changes to release-notes:
- *		     4) write a simple `quickstart' section in the
- *                      release notes; I volunteer if you don't want to
- * 		     5) include a pointer to video4linux in the doc
- *                      to stimulate video applications
- *                   6) release notes lines 331 and 362: explain what happens
- *			if the application data rate is higher than 1100 KB/s; 
- *			similar approach to lower-than-500 kB/s ?
- *		     7) 6.6 Comparison; wouldn't it be better to allow different 
- *			strategies for read and write ?
- *			Wouldn't it be better to control the tape buffer
- *			contents instead of the bandwidth ?
- *		     8) line 536: replace will by would (if I understand
- *			this section correctly, a hypothetical and unwanted situation
- *			 is being described)
- * Ver 1.16f Dec 15 99   Change place of the secondary OnStream header frames.
- * Ver 1.17  Nov 2000 / Jan 2001  Marcel Mol, marcel@mesa.nl
- *			- Add idetape_onstream_mode_sense_tape_parameter_page
- *			  function to get tape capacity in frames: tape->capacity.
- *			- Add support for DI-50 drives( or any DI- drive).
- *			- 'workaround' for read error/blank block around block 3000.
- *			- Implement Early warning for end of media for Onstream.
- *			- Cosmetic code changes for readability.
- *			- Idetape_position_tape should not use SKIP bit during
- *			  Onstream read recovery.
- *			- Add capacity, logical_blk_num and first/last_frame_position
- *			  to /proc/ide/hd?/settings.
- *			- Module use count was gone in the Linux 2.4 driver.
- * Ver 1.17a Apr 2001 Willem Riede osst@riede.org
- * 			- Get drive's actual block size from mode sense block descriptor
- * 			- Limit size of pipeline
- * Ver 1.17b Oct 2002   Alan Stern <stern@rowland.harvard.edu>
- *			Changed IDETAPE_MIN_PIPELINE_STAGES to 1 and actually used
- *			 it in the code!
- *			Actually removed aborted stages in idetape_abort_pipeline
- *			 instead of just changing the command code.
- *			Made the transfer byte count for Request Sense equal to the
- *			 actual length of the data transfer.
- *			Changed handling of partial data transfers: they do not
- *			 cause DMA errors.
- *			Moved initiation of DMA transfers to the correct place.
- *			Removed reference to unallocated memory.
- *			Made __idetape_discard_read_pipeline return the number of
- *			 sectors skipped, not the number of stages.
- *			Replaced errant kfree() calls with __idetape_kfree_stage().
- *			Fixed off-by-one error in testing the pipeline length.
- *			Fixed handling of filemarks in the read pipeline.
- *			Small code optimization for MTBSF and MTBSFM ioctls.
- *			Don't try to unlock the door during device close if is
- *			 already unlocked!
- *			Cosmetic fixes to miscellaneous debugging output messages.
- *			Set the minimum /proc/ide/hd?/settings values for "pipeline",
- *			 "pipeline_min", and "pipeline_max" to 1.
- *
- * Here are some words from the first releases of hd.c, which are quoted
- * in ide.c and apply here as well:
- *
- * | Special care is recommended.  Have Fun!
  *
- */
-
-/*
- * An overview of the pipelined operation mode.
- *
- * In the pipelined write mode, we will usually just add requests to our
- * pipeline and return immediately, before we even start to service them. The
- * user program will then have enough time to prepare the next request while
- * we are still busy servicing previous requests. In the pipelined read mode,
- * the situation is similar - we add read-ahead requests into the pipeline,
- * before the user even requested them.
- *
- * The pipeline can be viewed as a "safety net" which will be activated when
- * the system load is high and prevents the user backup program from keeping up
- * with the current tape speed. At this point, the pipeline will get
- * shorter and shorter but the tape will still be streaming at the same speed.
- * Assuming we have enough pipeline stages, the system load will hopefully
- * decrease before the pipeline is completely empty, and the backup program
- * will be able to "catch up" and refill the pipeline again.
- * 
- * When using the pipelined mode, it would be best to disable any type of
- * buffering done by the user program, as ide-tape already provides all the
- * benefits in the kernel, where it can be done in a more efficient way.
- * As we will usually not block the user program on a request, the most
- * efficient user code will then be a simple read-write-read-... cycle.
- * Any additional logic will usually just slow down the backup process.
- *
- * Using the pipelined mode, I get a constant over 400 KBps throughput,
- * which seems to be the maximum throughput supported by my tape.
- *
- * However, there are some downfalls:
- *
- *	1.	We use memory (for data buffers) in proportional to the number
- *		of pipeline stages (each stage is about 26 KB with my tape).
- *	2.	In the pipelined write mode, we cheat and postpone error codes
- *		to the user task. In read mode, the actual tape position
- *		will be a bit further than the last requested block.
- *
- * Concerning (1):
- *
- *	1.	We allocate stages dynamically only when we need them. When
- *		we don't need them, we don't consume additional memory. In
- *		case we can't allocate stages, we just manage without them
- *		(at the expense of decreased throughput) so when Linux is
- *		tight in memory, we will not pose additional difficulties.
- *
- *	2.	The maximum number of stages (which is, in fact, the maximum
- *		amount of memory) which we allocate is limited by the compile
- *		time parameter IDETAPE_MAX_PIPELINE_STAGES.
- *
- *	3.	The maximum number of stages is a controlled parameter - We
- *		don't start from the user defined maximum number of stages
- *		but from the lower IDETAPE_MIN_PIPELINE_STAGES (again, we
- *		will not even allocate this amount of stages if the user
- *		program can't handle the speed). We then implement a feedback
- *		loop which checks if the pipeline is empty, and if it is, we
- *		increase the maximum number of stages as necessary until we
- *		reach the optimum value which just manages to keep the tape
- *		busy with minimum allocated memory or until we reach
- *		IDETAPE_MAX_PIPELINE_STAGES.
- *
- * Concerning (2):
- *
- *	In pipelined write mode, ide-tape can not return accurate error codes
- *	to the user program since we usually just add the request to the
- *      pipeline without waiting for it to be serviced. In case an error
- *      occurs, I will report it on the next user request.
- *
- *	In the pipelined read mode, subsequent read requests or forward
- *	filemark spacing will perform correctly, as we preserve all blocks
- *	and filemarks which we encountered during our excess read-ahead.
- * 
- *	For accurate tape positioning and error reporting, disabling
- *	pipelined mode might be the best option.
- *
- * You can enable/disable/tune the pipelined operation mode by adjusting
- * the compile time parameters below.
- */
-
-/*
- *	Possible improvements.
- *
- *	1.	Support for the ATAPI overlap protocol.
- *
- *		In order to maximize bus throughput, we currently use the DSC
- *		overlap method which enables ide.c to service requests from the
- *		other device while the tape is busy executing a command. The
- *		DSC overlap method involves polling the tape's status register
- *		for the DSC bit, and servicing the other device while the tape
- *		isn't ready.
- *
- *		In the current QIC development standard (December 1995),
- *		it is recommended that new tape drives will *in addition* 
- *		implement the ATAPI overlap protocol, which is used for the
- *		same purpose - efficient use of the IDE bus, but is interrupt
- *		driven and thus has much less CPU overhead.
- *
- *		ATAPI overlap is likely to be supported in most new ATAPI
- *		devices, including new ATAPI cdroms, and thus provides us
- *		a method by which we can achieve higher throughput when
- *		sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
+ * For a historical changelog see
+ * Documentation/ide/ChangeLog.ide-tape.1995-2002
  */
 
 #define IDETAPE_VERSION "1.19"
@@ -442,49 +36,13 @@
 #include <linux/completion.h>
 #include <linux/bitops.h>
 #include <linux/mutex.h>
+#include <scsi/scsi.h>
 
 #include <asm/byteorder.h>
 #include <asm/irq.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/unaligned.h>
-
-/*
- * partition
- */
-typedef struct os_partition_s {
-	__u8	partition_num;
-	__u8	par_desc_ver;
-	__u16	wrt_pass_cntr;
-	__u32	first_frame_addr;
-	__u32	last_frame_addr;
-	__u32	eod_frame_addr;
-} os_partition_t;
-
-/*
- * DAT entry
- */
-typedef struct os_dat_entry_s {
-	__u32	blk_sz;
-	__u16	blk_cnt;
-	__u8	flags;
-	__u8	reserved;
-} os_dat_entry_t;
-
-/*
- * DAT
- */
-#define OS_DAT_FLAGS_DATA	(0xc)
-#define OS_DAT_FLAGS_MARK	(0x1)
-
-typedef struct os_dat_s {
-	__u8		dat_sz;
-	__u8		reserved1;
-	__u8		entry_cnt;
-	__u8		reserved3;
-	os_dat_entry_t	dat_list[16];
-} os_dat_t;
-
 #include <linux/mtio.h>
 
 /**************************** Tunable parameters *****************************/
@@ -512,10 +70,7 @@ typedef struct os_dat_s {
 /*
  *	The following are used to debug the driver:
  *
- *	Setting IDETAPE_DEBUG_INFO to 1 will report device capabilities.
  *	Setting IDETAPE_DEBUG_LOG to 1 will log driver flow control.
- *	Setting IDETAPE_DEBUG_BUGS to 1 will enable self-sanity checks in
- *	some places.
  *
  *	Setting them to 0 will restore normal operation mode:
  *
@@ -527,9 +82,7 @@ typedef struct os_dat_s {
  *	is verified to be stable enough. This will make it much more
  *	esthetic.
  */
-#define IDETAPE_DEBUG_INFO		0
 #define IDETAPE_DEBUG_LOG		0
-#define IDETAPE_DEBUG_BUGS		1
 
 /*
  *	After each failed packet command we issue a request sense command
@@ -671,65 +224,6 @@ typedef struct idetape_packet_command_s {
 #define	PC_WRITING			5
 
 /*
- *	Capabilities and Mechanical Status Page
- */
-typedef struct {
-	unsigned	page_code	:6;	/* Page code - Should be 0x2a */
-	__u8		reserved0_6	:1;
-	__u8		ps		:1;	/* parameters saveable */
-	__u8		page_length;		/* Page Length - Should be 0x12 */
-	__u8		reserved2, reserved3;
-	unsigned	ro		:1;	/* Read Only Mode */
-	unsigned	reserved4_1234	:4;
-	unsigned	sprev		:1;	/* Supports SPACE in the reverse direction */
-	unsigned	reserved4_67	:2;
-	unsigned	reserved5_012	:3;
-	unsigned	efmt		:1;	/* Supports ERASE command initiated formatting */
-	unsigned	reserved5_4	:1;
-	unsigned	qfa		:1;	/* Supports the QFA two partition formats */
-	unsigned	reserved5_67	:2;
-	unsigned	lock		:1;	/* Supports locking the volume */
-	unsigned	locked		:1;	/* The volume is locked */
-	unsigned	prevent		:1;	/* The device defaults in the prevent state after power up */	
-	unsigned	eject		:1;	/* The device can eject the volume */
-	__u8		disconnect	:1;	/* The device can break request > ctl */	
-	__u8		reserved6_5	:1;
-	unsigned	ecc		:1;	/* Supports error correction */
-	unsigned	cmprs		:1;	/* Supports data compression */
-	unsigned	reserved7_0	:1;
-	unsigned	blk512		:1;	/* Supports 512 bytes block size */
-	unsigned	blk1024		:1;	/* Supports 1024 bytes block size */
-	unsigned	reserved7_3_6	:4;
-	unsigned	blk32768	:1;	/* slowb - the device restricts the byte count for PIO */
-						/* transfers for slow buffer memory ??? */
-						/* Also 32768 block size in some cases */
-	__u16		max_speed;		/* Maximum speed supported in KBps */
-	__u8		reserved10, reserved11;
-	__u16		ctl;			/* Continuous Transfer Limit in blocks */
-	__u16		speed;			/* Current Speed, in KBps */
-	__u16		buffer_size;		/* Buffer Size, in 512 bytes */
-	__u8		reserved18, reserved19;
-} idetape_capabilities_page_t;
-
-/*
- *	Block Size Page
- */
-typedef struct {
-	unsigned	page_code	:6;	/* Page code - Should be 0x30 */
-	unsigned	reserved1_6	:1;
-	unsigned	ps		:1;
-	__u8		page_length;		/* Page Length - Should be 2 */
-	__u8		reserved2;
-	unsigned	play32		:1;
-	unsigned	play32_5	:1;
-	unsigned	reserved2_23	:2;
-	unsigned	record32	:1;
-	unsigned	record32_5	:1;
-	unsigned	reserved2_6	:1;
-	unsigned	one		:1;
-} idetape_block_size_page_t;
-
-/*
  *	A pipeline stage.
  */
 typedef struct idetape_stage_s {
@@ -739,32 +233,6 @@ typedef struct idetape_stage_s {
 } idetape_stage_t;
 
 /*
- *	REQUEST SENSE packet command result - Data Format.
- */
-typedef struct {
-	unsigned	error_code	:7;	/* Current of deferred errors */
-	unsigned	valid		:1;	/* The information field conforms to QIC-157C */
-	__u8		reserved1	:8;	/* Segment Number - Reserved */
-	unsigned	sense_key	:4;	/* Sense Key */
-	unsigned	reserved2_4	:1;	/* Reserved */
-	unsigned	ili		:1;	/* Incorrect Length Indicator */
-	unsigned	eom		:1;	/* End Of Medium */
-	unsigned	filemark 	:1;	/* Filemark */
-	__u32		information __attribute__ ((packed));
-	__u8		asl;			/* Additional sense length (n-7) */
-	__u32		command_specific;	/* Additional command specific information */
-	__u8		asc;			/* Additional Sense Code */
-	__u8		ascq;			/* Additional Sense Code Qualifier */
-	__u8		replaceable_unit_code;	/* Field Replaceable Unit Code */
-	unsigned	sk_specific1 	:7;	/* Sense Key Specific */
-	unsigned	sksv		:1;	/* Sense Key Specific information is valid */
-	__u8		sk_specific2;		/* Sense Key Specific */
-	__u8		sk_specific3;		/* Sense Key Specific */
-	__u8		pad[2];			/* Padding to 20 bytes */
-} idetape_request_sense_result_t;
-
-
-/*
  *	Most of our global data which we need to save even as we leave the
  *	driver due to an interrupt or a timer event is stored in a variable
  *	of type idetape_tape_t, defined below.
@@ -854,8 +322,9 @@ typedef struct ide_tape_obj {
 	/* Usually 512 or 1024 bytes */
 	unsigned short tape_block_size;
 	int user_bs_factor;
+
 	/* Copy of the tape's Capabilities and Mechanical Page */
-	idetape_capabilities_page_t capabilities;
+	u8 caps[20];
 
 	/*
 	 *	Active data transfer request parameters.
@@ -918,9 +387,6 @@ typedef struct ide_tape_obj {
 	int avg_size;
 	int avg_speed;
 
-	/* last sense information */
-	idetape_request_sense_result_t sense;
-
 	char vendor_id[10];
 	char product_id[18];
 	char firmware_revision[6];
@@ -1052,27 +518,6 @@ static void ide_tape_put(struct ide_tape_obj *tape)
 #define IDETAPE_MEDIUM_PRESENT		9
 
 /*
- *	Supported ATAPI tape drives packet commands
- */
-#define IDETAPE_TEST_UNIT_READY_CMD	0x00
-#define IDETAPE_REWIND_CMD		0x01
-#define IDETAPE_REQUEST_SENSE_CMD	0x03
-#define IDETAPE_READ_CMD		0x08
-#define IDETAPE_WRITE_CMD		0x0a
-#define IDETAPE_WRITE_FILEMARK_CMD	0x10
-#define IDETAPE_SPACE_CMD		0x11
-#define IDETAPE_INQUIRY_CMD		0x12
-#define IDETAPE_ERASE_CMD		0x19
-#define IDETAPE_MODE_SENSE_CMD		0x1a
-#define IDETAPE_MODE_SELECT_CMD		0x15
-#define IDETAPE_LOAD_UNLOAD_CMD		0x1b
-#define IDETAPE_PREVENT_CMD		0x1e
-#define IDETAPE_LOCATE_CMD		0x2b
-#define IDETAPE_READ_POSITION_CMD	0x34
-#define IDETAPE_READ_BUFFER_CMD		0x3c
-#define IDETAPE_SET_SPEED_CMD		0xbb
-
-/*
  *	Some defines for the READ BUFFER command
  */
 #define IDETAPE_RETRIEVE_FAULTY_BLOCK	6
@@ -1129,31 +574,6 @@ struct idetape_id_gcw {
 };
 
 /*
- *	INQUIRY packet command - Data Format (From Table 6-8 of QIC-157C)
- */
-typedef struct {
-	unsigned	device_type	:5;	/* Peripheral Device Type */
-	unsigned	reserved0_765	:3;	/* Peripheral Qualifier - Reserved */
-	unsigned	reserved1_6t0	:7;	/* Reserved */
-	unsigned	rmb		:1;	/* Removable Medium Bit */
-	unsigned	ansi_version	:3;	/* ANSI Version */
-	unsigned	ecma_version	:3;	/* ECMA Version */
-	unsigned	iso_version	:2;	/* ISO Version */
-	unsigned	response_format :4;	/* Response Data Format */
-	unsigned	reserved3_45	:2;	/* Reserved */
-	unsigned	reserved3_6	:1;	/* TrmIOP - Reserved */
-	unsigned	reserved3_7	:1;	/* AENC - Reserved */
-	__u8		additional_length;	/* Additional Length (total_length-4) */
-	__u8		rsv5, rsv6, rsv7;	/* Reserved */
-	__u8		vendor_id[8];		/* Vendor Identification */
-	__u8		product_id[16];		/* Product Identification */
-	__u8		revision_level[4];	/* Revision Level */
-	__u8		vendor_specific[20];	/* Vendor Specific - Optional */
-	__u8		reserved56t95[40];	/* Reserved - Optional */
-						/* Additional information may be returned */
-} idetape_inquiry_result_t;
-
-/*
  *	READ POSITION packet command - Data Format (From Table 6-57)
  */
 typedef struct {
@@ -1171,100 +591,9 @@ typedef struct {
 	u32		bytes_in_buffer;	/* Bytes In Buffer (Optional) */
 } idetape_read_position_result_t;
 
-/*
- *	Follows structures which are related to the SELECT SENSE / MODE SENSE
- *	packet commands. Those packet commands are still not supported
- *	by ide-tape.
- */
+/* Structures related to the SELECT SENSE / MODE SENSE packet commands. */
 #define IDETAPE_BLOCK_DESCRIPTOR	0
 #define	IDETAPE_CAPABILITIES_PAGE	0x2a
-#define IDETAPE_PARAMTR_PAGE		0x2b   /* Onstream DI-x0 only */
-#define IDETAPE_BLOCK_SIZE_PAGE		0x30
-#define IDETAPE_BUFFER_FILLING_PAGE	0x33
-
-/*
- *	Mode Parameter Header for the MODE SENSE packet command
- */
-typedef struct {
-	__u8	mode_data_length;	/* Length of the following data transfer */
-	__u8	medium_type;		/* Medium Type */
-	__u8	dsp;			/* Device Specific Parameter */
-	__u8	bdl;			/* Block Descriptor Length */
-#if 0
-	/* data transfer page */
-	__u8	page_code	:6;
-	__u8	reserved0_6	:1;
-	__u8	ps		:1;	/* parameters saveable */
-	__u8	page_length;		/* page Length == 0x02 */
-	__u8	reserved2;
-	__u8	read32k		:1;	/* 32k blk size (data only) */
-	__u8	read32k5	:1;	/* 32.5k blk size (data&AUX) */
-	__u8	reserved3_23	:2;
-	__u8	write32k	:1;	/* 32k blk size (data only) */
-	__u8	write32k5	:1;	/* 32.5k blk size (data&AUX) */
-	__u8	reserved3_6	:1;
-	__u8	streaming	:1;	/* streaming mode enable */
-#endif
-} idetape_mode_parameter_header_t;
-
-/*
- *	Mode Parameter Block Descriptor the MODE SENSE packet command
- *
- *	Support for block descriptors is optional.
- */
-typedef struct {
-	__u8		density_code;		/* Medium density code */
-	__u8		blocks[3];		/* Number of blocks */
-	__u8		reserved4;		/* Reserved */
-	__u8		length[3];		/* Block Length */
-} idetape_parameter_block_descriptor_t;
-
-/*
- *	The Data Compression Page, as returned by the MODE SENSE packet command.
- */
-typedef struct {
-	unsigned	page_code	:6;	/* Page Code - Should be 0xf */
-	unsigned	reserved0	:1;	/* Reserved */
-	unsigned	ps		:1;
-	__u8		page_length;		/* Page Length - Should be 14 */
-	unsigned	reserved2	:6;	/* Reserved */
-	unsigned	dcc		:1;	/* Data Compression Capable */
-	unsigned	dce		:1;	/* Data Compression Enable */
-	unsigned	reserved3	:5;	/* Reserved */
-	unsigned	red		:2;	/* Report Exception on Decompression */
-	unsigned	dde		:1;	/* Data Decompression Enable */
-	__u32		ca;			/* Compression Algorithm */
-	__u32		da;			/* Decompression Algorithm */
-	__u8		reserved[4];		/* Reserved */
-} idetape_data_compression_page_t;
-
-/*
- *	The Medium Partition Page, as returned by the MODE SENSE packet command.
- */
-typedef struct {
-	unsigned	page_code	:6;	/* Page Code - Should be 0x11 */
-	unsigned	reserved1_6	:1;	/* Reserved */
-	unsigned	ps		:1;
-	__u8		page_length;		/* Page Length - Should be 6 */
-	__u8		map;			/* Maximum Additional Partitions - Should be 0 */
-	__u8		apd;			/* Additional Partitions Defined - Should be 0 */
-	unsigned	reserved4_012	:3;	/* Reserved */
-	unsigned	psum		:2;	/* Should be 0 */
-	unsigned	idp		:1;	/* Should be 0 */
-	unsigned	sdp		:1;	/* Should be 0 */
-	unsigned	fdp		:1;	/* Fixed Data Partitions */
-	__u8		mfr;			/* Medium Format Recognition */
-	__u8		reserved[2];		/* Reserved */
-} idetape_medium_partition_page_t;
-
-/*
- *	Run time configurable parameters.
- */
-typedef struct {
-	int	dsc_rw_frequency;
-	int	dsc_media_access_frequency;
-	int	nr_stages;
-} idetape_config_t;
 
 /*
  *	The variables below are used for the character device interface.
@@ -1309,14 +638,12 @@ static void idetape_input_buffers (ide_drive_t *drive, idetape_pc_t *pc, unsigne
 	int count;
 
 	while (bcount) {
-#if IDETAPE_DEBUG_BUGS
 		if (bh == NULL) {
 			printk(KERN_ERR "ide-tape: bh == NULL in "
 				"idetape_input_buffers\n");
 			idetape_discard_data(drive, bcount);
 			return;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), bcount);
 		HWIF(drive)->atapi_input_bytes(drive, bh->b_data + atomic_read(&bh->b_count), count);
 		bcount -= count;
@@ -1336,13 +663,11 @@ static void idetape_output_buffers (ide_drive_t *drive, idetape_pc_t *pc, unsign
 	int count;
 
 	while (bcount) {
-#if IDETAPE_DEBUG_BUGS
 		if (bh == NULL) {
 			printk(KERN_ERR "ide-tape: bh == NULL in "
 				"idetape_output_buffers\n");
 			return;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		count = min((unsigned int)pc->b_count, (unsigned int)bcount);
 		HWIF(drive)->atapi_output_bytes(drive, pc->b_data, count);
 		bcount -= count;
@@ -1367,13 +692,11 @@ static void idetape_update_buffers (idetape_pc_t *pc)
 	if (test_bit(PC_WRITING, &pc->flags))
 		return;
 	while (bcount) {
-#if IDETAPE_DEBUG_BUGS
 		if (bh == NULL) {
 			printk(KERN_ERR "ide-tape: bh == NULL in "
 				"idetape_update_buffers\n");
 			return;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		count = min((unsigned int)bh->b_size, (unsigned int)bcount);
 		atomic_set(&bh->b_count, count);
 		if (atomic_read(&bh->b_count) == bh->b_size)
@@ -1446,36 +769,34 @@ static void idetape_init_pc (idetape_pc_t *pc)
 }
 
 /*
- *	idetape_analyze_error is called on each failed packet command retry
- *	to analyze the request sense. We currently do not utilize this
- *	information.
+ * called on each failed packet command retry to analyze the request sense. We
+ * currently do not utilize this information.
  */
-static void idetape_analyze_error (ide_drive_t *drive, idetape_request_sense_result_t *result)
+static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	idetape_pc_t *pc = tape->failed_pc;
 
-	tape->sense     = *result;
-	tape->sense_key = result->sense_key;
-	tape->asc       = result->asc;
-	tape->ascq      = result->ascq;
+	tape->sense_key = sense[2] & 0xF;
+	tape->asc       = sense[12];
+	tape->ascq      = sense[13];
 #if IDETAPE_DEBUG_LOG
 	/*
-	 *	Without debugging, we only log an error if we decided to
-	 *	give up retrying.
+	 * Without debugging, we only log an error if we decided to give up
+	 * retrying.
 	 */
 	if (tape->debug_level >= 1)
 		printk(KERN_INFO "ide-tape: pc = %x, sense key = %x, "
 			"asc = %x, ascq = %x\n",
-			pc->c[0], result->sense_key,
-			result->asc, result->ascq);
+			pc->c[0], tape->sense_key,
+			tape->asc, tape->ascq);
 #endif /* IDETAPE_DEBUG_LOG */
 
-	/*
-	 *	Correct pc->actually_transferred by asking the tape.
-	 */
+	/* Correct pc->actually_transferred by asking the tape.	 */
 	if (test_bit(PC_DMA_ERROR, &pc->flags)) {
-		pc->actually_transferred = pc->request_transfer - tape->tape_block_size * ntohl(get_unaligned(&result->information));
+		pc->actually_transferred = pc->request_transfer -
+			tape->tape_block_size *
+			be32_to_cpu(get_unaligned((u32 *)&sense[3]));
 		idetape_update_buffers(pc);
 	}
 
@@ -1484,29 +805,29 @@ static void idetape_analyze_error (ide_drive_t *drive, idetape_request_sense_res
 	 * with sense key=5, asc=0x22, ascq=0, let it slide.  Some drives
 	 * (i.e. Seagate STT3401A Travan) don't support 0-length read/writes.
 	 */
-	if ((pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD)
-	    && pc->c[4] == 0 && pc->c[3] == 0 && pc->c[2] == 0) { /* length==0 */
-		if (result->sense_key == 5) {
+	if ((pc->c[0] == READ_6 || pc->c[0] == WRITE_6)
+	    /* length == 0 */
+	    && pc->c[4] == 0 && pc->c[3] == 0 && pc->c[2] == 0) {
+		if (tape->sense_key == 5) {
 			/* don't report an error, everything's ok */
 			pc->error = 0;
 			/* don't retry read/write */
 			set_bit(PC_ABORT, &pc->flags);
 		}
 	}
-	if (pc->c[0] == IDETAPE_READ_CMD && result->filemark) {
+	if (pc->c[0] == READ_6 && (sense[2] & 0x80)) {
 		pc->error = IDETAPE_ERROR_FILEMARK;
 		set_bit(PC_ABORT, &pc->flags);
 	}
-	if (pc->c[0] == IDETAPE_WRITE_CMD) {
-		if (result->eom ||
-		    (result->sense_key == 0xd && result->asc == 0x0 &&
-		     result->ascq == 0x2)) {
+	if (pc->c[0] == WRITE_6) {
+		if ((sense[2] & 0x40) || (tape->sense_key == 0xd
+		     && tape->asc == 0x0 && tape->ascq == 0x2)) {
 			pc->error = IDETAPE_ERROR_EOD;
 			set_bit(PC_ABORT, &pc->flags);
 		}
 	}
-	if (pc->c[0] == IDETAPE_READ_CMD || pc->c[0] == IDETAPE_WRITE_CMD) {
-		if (result->sense_key == 8) {
+	if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
+		if (tape->sense_key == 8) {
 			pc->error = IDETAPE_ERROR_EOD;
 			set_bit(PC_ABORT, &pc->flags);
 		}
@@ -1516,10 +837,7 @@ static void idetape_analyze_error (ide_drive_t *drive, idetape_request_sense_res
 	}
 }
 
-/*
- * idetape_active_next_stage will declare the next stage as "active".
- */
-static void idetape_active_next_stage (ide_drive_t *drive)
+static void idetape_activate_next_stage(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	idetape_stage_t *stage = tape->next_stage;
@@ -1529,12 +847,10 @@ static void idetape_active_next_stage (ide_drive_t *drive)
 	if (tape->debug_level >= 4)
 		printk(KERN_INFO "ide-tape: Reached idetape_active_next_stage\n");
 #endif /* IDETAPE_DEBUG_LOG */
-#if IDETAPE_DEBUG_BUGS
 	if (stage == NULL) {
 		printk(KERN_ERR "ide-tape: bug: Trying to activate a non existing stage\n");
 		return;
 	}
-#endif /* IDETAPE_DEBUG_BUGS */	
 
 	rq->rq_disk = tape->disk;
 	rq->buffer = NULL;
@@ -1609,28 +925,24 @@ static void idetape_remove_stage_head (ide_drive_t *drive)
 	if (tape->debug_level >= 4)
 		printk(KERN_INFO "ide-tape: Reached idetape_remove_stage_head\n");
 #endif /* IDETAPE_DEBUG_LOG */
-#if IDETAPE_DEBUG_BUGS
 	if (tape->first_stage == NULL) {
 		printk(KERN_ERR "ide-tape: bug: tape->first_stage is NULL\n");
-		return;		
+		return;
 	}
 	if (tape->active_stage == tape->first_stage) {
 		printk(KERN_ERR "ide-tape: bug: Trying to free our active pipeline stage\n");
 		return;
 	}
-#endif /* IDETAPE_DEBUG_BUGS */
 	stage = tape->first_stage;
 	tape->first_stage = stage->next;
 	idetape_kfree_stage(tape, stage);
 	tape->nr_stages--;
 	if (tape->first_stage == NULL) {
 		tape->last_stage = NULL;
-#if IDETAPE_DEBUG_BUGS
 		if (tape->next_stage != NULL)
 			printk(KERN_ERR "ide-tape: bug: tape->next_stage != NULL\n");
 		if (tape->nr_stages)
 			printk(KERN_ERR "ide-tape: bug: nr_stages should be 0 now\n");
-#endif /* IDETAPE_DEBUG_BUGS */
 	}
 }
 
@@ -1716,7 +1028,7 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
 			}
 		}
 		if (tape->next_stage != NULL) {
-			idetape_active_next_stage(drive);
+			idetape_activate_next_stage(drive);
 
 			/*
 			 * Insert the next request into the request queue.
@@ -1748,7 +1060,7 @@ static ide_startstop_t idetape_request_sense_callback (ide_drive_t *drive)
 		printk(KERN_INFO "ide-tape: Reached idetape_request_sense_callback\n");
 #endif /* IDETAPE_DEBUG_LOG */
 	if (!tape->pc->error) {
-		idetape_analyze_error(drive, (idetape_request_sense_result_t *) tape->pc->buffer);
+		idetape_analyze_error(drive, tape->pc->buffer);
 		idetape_end_request(drive, 1, 0);
 	} else {
 		printk(KERN_ERR "ide-tape: Error in REQUEST SENSE itself - Aborting request!\n");
@@ -1760,7 +1072,7 @@ static ide_startstop_t idetape_request_sense_callback (ide_drive_t *drive)
 static void idetape_create_request_sense_cmd (idetape_pc_t *pc)
 {
 	idetape_init_pc(pc);	
-	pc->c[0] = IDETAPE_REQUEST_SENSE_CMD;
+	pc->c[0] = REQUEST_SENSE;
 	pc->c[4] = 20;
 	pc->request_transfer = 20;
 	pc->callback = &idetape_request_sense_callback;
@@ -1913,15 +1225,14 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
 		local_irq_enable();
 
 #if SIMULATE_ERRORS
-		if ((pc->c[0] == IDETAPE_WRITE_CMD ||
-		     pc->c[0] == IDETAPE_READ_CMD) &&
+		if ((pc->c[0] == WRITE_6 || pc->c[0] == READ_6) &&
 		    (++error_sim_count % 100) == 0) {
 			printk(KERN_INFO "ide-tape: %s: simulating error\n",
 				tape->name);
 			stat |= ERR_STAT;
 		}
 #endif
-		if ((stat & ERR_STAT) && pc->c[0] == IDETAPE_REQUEST_SENSE_CMD)
+		if ((stat & ERR_STAT) && pc->c[0] == REQUEST_SENSE)
 			stat &= ~ERR_STAT;
 		if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
 			/* Error detected */
@@ -1930,7 +1241,7 @@ static ide_startstop_t idetape_pc_intr (ide_drive_t *drive)
 				printk(KERN_INFO "ide-tape: %s: I/O error\n",
 					tape->name);
 #endif /* IDETAPE_DEBUG_LOG */
-			if (pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
+			if (pc->c[0] == REQUEST_SENSE) {
 				printk(KERN_ERR "ide-tape: I/O error in request sense command\n");
 				return ide_do_reset(drive);
 			}
@@ -2118,15 +1429,13 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
 	int dma_ok = 0;
 	u16 bcount;
 
-#if IDETAPE_DEBUG_BUGS
-	if (tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD &&
-	    pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
+	if (tape->pc->c[0] == REQUEST_SENSE &&
+	    pc->c[0] == REQUEST_SENSE) {
 		printk(KERN_ERR "ide-tape: possible ide-tape.c bug - "
 			"Two request sense in serial were issued\n");
 	}
-#endif /* IDETAPE_DEBUG_BUGS */
 
-	if (tape->failed_pc == NULL && pc->c[0] != IDETAPE_REQUEST_SENSE_CMD)
+	if (tape->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
 		tape->failed_pc = pc;
 	/* Set the current packet command */
 	tape->pc = pc;
@@ -2139,7 +1448,7 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
 		 *	filemark, or end of the media, for example).
 		 */
 		if (!test_bit(PC_ABORT, &pc->flags)) {
-			if (!(pc->c[0] == IDETAPE_TEST_UNIT_READY_CMD &&
+			if (!(pc->c[0] == TEST_UNIT_READY &&
 			      tape->sense_key == 2 && tape->asc == 4 &&
 			     (tape->ascq == 1 || tape->ascq == 8))) {
 				printk(KERN_ERR "ide-tape: %s: I/O error, "
@@ -2181,8 +1490,8 @@ static ide_startstop_t idetape_issue_packet_command (ide_drive_t *drive, idetape
 	if (dma_ok)			/* Will begin DMA later */
 		set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
 	if (test_bit(IDETAPE_DRQ_INTERRUPT, &tape->flags)) {
-		ide_set_handler(drive, &idetape_transfer_pc, IDETAPE_WAIT_CMD, NULL);
-		hwif->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
+		ide_execute_command(drive, WIN_PACKETCMD, &idetape_transfer_pc,
+				    IDETAPE_WAIT_CMD, NULL);
 		return ide_started;
 	} else {
 		hwif->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
@@ -2212,7 +1521,7 @@ static ide_startstop_t idetape_pc_callback (ide_drive_t *drive)
 static void idetape_create_mode_sense_cmd (idetape_pc_t *pc, u8 page_code)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_MODE_SENSE_CMD;
+	pc->c[0] = MODE_SENSE;
 	if (page_code != IDETAPE_BLOCK_DESCRIPTOR)
 		pc->c[1] = 8;	/* DBD = 1 - Don't return block descriptors */
 	pc->c[2] = page_code;
@@ -2293,7 +1602,7 @@ static ide_startstop_t idetape_media_access_finished (ide_drive_t *drive)
 	if (stat & SEEK_STAT) {
 		if (stat & ERR_STAT) {
 			/* Error detected */
-			if (pc->c[0] != IDETAPE_TEST_UNIT_READY_CMD)
+			if (pc->c[0] != TEST_UNIT_READY)
 				printk(KERN_ERR "ide-tape: %s: I/O error, ",
 						tape->name);
 			/* Retry operation */
@@ -2350,8 +1659,8 @@ static ide_startstop_t idetape_rw_callback (ide_drive_t *drive)
 static void idetape_create_read_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct idetape_bh *bh)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_READ_CMD;
-	put_unaligned(htonl(length), (unsigned int *) &pc->c[1]);
+	pc->c[0] = READ_6;
+	put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
 	pc->c[1] = 1;
 	pc->callback = &idetape_rw_callback;
 	pc->bh = bh;
@@ -2368,7 +1677,7 @@ static void idetape_create_read_buffer_cmd(idetape_tape_t *tape, idetape_pc_t *p
 	struct idetape_bh *p = bh;
 
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_READ_BUFFER_CMD;
+	pc->c[0] = READ_BUFFER;
 	pc->c[1] = IDETAPE_RETRIEVE_FAULTY_BLOCK;
 	pc->c[7] = size >> 8;
 	pc->c[8] = size & 0xff;
@@ -2386,8 +1695,8 @@ static void idetape_create_read_buffer_cmd(idetape_tape_t *tape, idetape_pc_t *p
 static void idetape_create_write_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsigned int length, struct idetape_bh *bh)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_WRITE_CMD;
-	put_unaligned(htonl(length), (unsigned int *) &pc->c[1]);
+	pc->c[0] = WRITE_6;
+	put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
 	pc->c[1] = 1;
 	pc->callback = &idetape_rw_callback;
 	set_bit(PC_WRITING, &pc->flags);
@@ -2412,12 +1721,6 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 	u8 stat;
 
 #if IDETAPE_DEBUG_LOG
-#if 0
-	if (tape->debug_level >= 5)
-		printk(KERN_INFO "ide-tape:  %d, "
-			"dev: %s, cmd: %ld, errors: %d\n",
-			 rq->rq_disk->disk_name, rq->cmd[0], rq->errors);
-#endif
 	if (tape->debug_level >= 2)
 		printk(KERN_INFO "ide-tape: sector: %ld, "
 			"nr_sectors: %ld, current_nr_sectors: %d\n",
@@ -2438,10 +1741,9 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 	 *	Retry a failed packet command
 	 */
 	if (tape->failed_pc != NULL &&
-	    tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD) {
+	    tape->pc->c[0] == REQUEST_SENSE) {
 		return idetape_issue_packet_command(drive, tape->failed_pc);
 	}
-#if IDETAPE_DEBUG_BUGS
 	if (postponed_rq != NULL)
 		if (rq != postponed_rq) {
 			printk(KERN_ERR "ide-tape: ide-tape.c bug - "
@@ -2449,7 +1751,6 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 			idetape_end_request(drive, 0, 0);
 			return ide_stopped;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 
 	tape->postponed_rq = NULL;
 
@@ -2636,13 +1937,11 @@ static int idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *
 	int ret = 0;
 
 	while (n) {
-#if IDETAPE_DEBUG_BUGS
 		if (bh == NULL) {
 			printk(KERN_ERR "ide-tape: bh == NULL in "
 				"idetape_copy_stage_from_user\n");
 			return 1;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), (unsigned int)n);
 		if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count))
 			ret = 1;
@@ -2666,13 +1965,11 @@ static int idetape_copy_stage_to_user (idetape_tape_t *tape, char __user *buf, i
 	int ret = 0;
 
 	while (n) {
-#if IDETAPE_DEBUG_BUGS
 		if (bh == NULL) {
 			printk(KERN_ERR "ide-tape: bh == NULL in "
 				"idetape_copy_stage_to_user\n");
 			return 1;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		count = min(tape->b_count, n);
 		if  (copy_to_user(buf, tape->b_data, count))
 			ret = 1;
@@ -2752,12 +2049,10 @@ static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
 	DECLARE_COMPLETION_ONSTACK(wait);
 	idetape_tape_t *tape = drive->driver_data;
 
-#if IDETAPE_DEBUG_BUGS
 	if (rq == NULL || !blk_special_request(rq)) {
 		printk (KERN_ERR "ide-tape: bug: Trying to sleep on non-valid request\n");
 		return;
 	}
-#endif /* IDETAPE_DEBUG_BUGS */
 	rq->end_io_data = &wait;
 	rq->end_io = blk_end_sync_rq;
 	spin_unlock_irq(&tape->spinlock);
@@ -2817,7 +2112,7 @@ static ide_startstop_t idetape_read_position_callback (ide_drive_t *drive)
 static void idetape_create_write_filemark_cmd (ide_drive_t *drive, idetape_pc_t *pc,int write_filemark)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_WRITE_FILEMARK_CMD;
+	pc->c[0] = WRITE_FILEMARKS;
 	pc->c[4] = write_filemark;
 	set_bit(PC_WAIT_FOR_DSC, &pc->flags);
 	pc->callback = &idetape_pc_callback;
@@ -2826,7 +2121,7 @@ static void idetape_create_write_filemark_cmd (ide_drive_t *drive, idetape_pc_t
 static void idetape_create_test_unit_ready_cmd(idetape_pc_t *pc)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_TEST_UNIT_READY_CMD;
+	pc->c[0] = TEST_UNIT_READY;
 	pc->callback = &idetape_pc_callback;
 }
 
@@ -2864,7 +2159,7 @@ static int __idetape_queue_pc_tail (ide_drive_t *drive, idetape_pc_t *pc)
 static void idetape_create_load_unload_cmd (ide_drive_t *drive, idetape_pc_t *pc,int cmd)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_LOAD_UNLOAD_CMD;
+	pc->c[0] = START_STOP;
 	pc->c[4] = cmd;
 	set_bit(PC_WAIT_FOR_DSC, &pc->flags);
 	pc->callback = &idetape_pc_callback;
@@ -2921,7 +2216,7 @@ static int idetape_flush_tape_buffers (ide_drive_t *drive)
 static void idetape_create_read_position_cmd (idetape_pc_t *pc)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_READ_POSITION_CMD;
+	pc->c[0] = READ_POSITION;
 	pc->request_transfer = 20;
 	pc->callback = &idetape_read_position_callback;
 }
@@ -2947,9 +2242,9 @@ static int idetape_read_position (ide_drive_t *drive)
 static void idetape_create_locate_cmd (ide_drive_t *drive, idetape_pc_t *pc, unsigned int block, u8 partition, int skip)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_LOCATE_CMD;
+	pc->c[0] = POSITION_TO_ELEMENT;
 	pc->c[1] = 2;
-	put_unaligned(htonl(block), (unsigned int *) &pc->c[3]);
+	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]);
 	pc->c[8] = partition;
 	set_bit(PC_WAIT_FOR_DSC, &pc->flags);
 	pc->callback = &idetape_pc_callback;
@@ -2959,11 +2254,12 @@ static int idetape_create_prevent_cmd (ide_drive_t *drive, idetape_pc_t *pc, int
 {
 	idetape_tape_t *tape = drive->driver_data;
 
-	if (!tape->capabilities.lock)
+	/* device supports locking according to capabilities page */
+	if (!(tape->caps[6] & 0x01))
 		return 0;
 
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_PREVENT_CMD;
+	pc->c[0] = ALLOW_MEDIUM_REMOVAL;
 	pc->c[4] = prevent;
 	pc->callback = &idetape_pc_callback;
 	return 1;
@@ -3072,12 +2368,10 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks, struct
 	if (tape->debug_level >= 2)
 		printk(KERN_INFO "ide-tape: idetape_queue_rw_tail: cmd=%d\n",cmd);
 #endif /* IDETAPE_DEBUG_LOG */
-#if IDETAPE_DEBUG_BUGS
 	if (idetape_pipeline_active(tape)) {
 		printk(KERN_ERR "ide-tape: bug: the pipeline is active in idetape_queue_rw_tail\n");
 		return (0);
 	}
-#endif /* IDETAPE_DEBUG_BUGS */	
 
 	idetape_init_rq(&rq, cmd);
 	rq.rq_disk = tape->disk;
@@ -3108,7 +2402,7 @@ static void idetape_insert_pipeline_into_queue (ide_drive_t *drive)
 		return;
 	if (!idetape_pipeline_active(tape)) {
 		set_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
-		idetape_active_next_stage(drive);
+		idetape_activate_next_stage(drive);
 		(void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
 	}
 }
@@ -3116,7 +2410,7 @@ static void idetape_insert_pipeline_into_queue (ide_drive_t *drive)
 static void idetape_create_inquiry_cmd (idetape_pc_t *pc)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_INQUIRY_CMD;
+	pc->c[0] = INQUIRY;
 	pc->c[4] = pc->request_transfer = 254;
 	pc->callback = &idetape_pc_callback;
 }
@@ -3124,28 +2418,15 @@ static void idetape_create_inquiry_cmd (idetape_pc_t *pc)
 static void idetape_create_rewind_cmd (ide_drive_t *drive, idetape_pc_t *pc)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_REWIND_CMD;
+	pc->c[0] = REZERO_UNIT;
 	set_bit(PC_WAIT_FOR_DSC, &pc->flags);
 	pc->callback = &idetape_pc_callback;
 }
 
-#if 0
-static void idetape_create_mode_select_cmd (idetape_pc_t *pc, int length)
-{
-	idetape_init_pc(pc);
-	set_bit(PC_WRITING, &pc->flags);
-	pc->c[0] = IDETAPE_MODE_SELECT_CMD;
-	pc->c[1] = 0x10;
-	put_unaligned(htons(length), (unsigned short *) &pc->c[3]);
-	pc->request_transfer = 255;
-	pc->callback = &idetape_pc_callback;
-}
-#endif
-
 static void idetape_create_erase_cmd (idetape_pc_t *pc)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_ERASE_CMD;
+	pc->c[0] = ERASE;
 	pc->c[1] = 1;
 	set_bit(PC_WAIT_FOR_DSC, &pc->flags);
 	pc->callback = &idetape_pc_callback;
@@ -3154,8 +2435,8 @@ static void idetape_create_erase_cmd (idetape_pc_t *pc)
 static void idetape_create_space_cmd (idetape_pc_t *pc,int count, u8 cmd)
 {
 	idetape_init_pc(pc);
-	pc->c[0] = IDETAPE_SPACE_CMD;
-	put_unaligned(htonl(count), (unsigned int *) &pc->c[1]);
+	pc->c[0] = SPACE;
+	put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]);
 	pc->c[1] = cmd;
 	set_bit(PC_WAIT_FOR_DSC, &pc->flags);
 	pc->callback = &idetape_pc_callback;
@@ -3275,8 +2556,7 @@ static void idetape_empty_write_pipeline (ide_drive_t *drive)
 	idetape_tape_t *tape = drive->driver_data;
 	int blocks, min;
 	struct idetape_bh *bh;
-	
-#if IDETAPE_DEBUG_BUGS
+
 	if (tape->chrdev_direction != idetape_direction_write) {
 		printk(KERN_ERR "ide-tape: bug: Trying to empty write pipeline, but we are not writing.\n");
 		return;
@@ -3285,7 +2565,6 @@ static void idetape_empty_write_pipeline (ide_drive_t *drive)
 		printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
 		tape->merge_stage_size = tape->stage_size;
 	}
-#endif /* IDETAPE_DEBUG_BUGS */
 	if (tape->merge_stage_size) {
 		blocks = tape->merge_stage_size / tape->tape_block_size;
 		if (tape->merge_stage_size % tape->tape_block_size) {
@@ -3330,7 +2609,6 @@ static void idetape_empty_write_pipeline (ide_drive_t *drive)
 	 *	 can be totally different on the next backup).
 	 */
 	tape->max_stages = tape->min_pipeline;
-#if IDETAPE_DEBUG_BUGS
 	if (tape->first_stage != NULL ||
 	    tape->next_stage != NULL ||
 	    tape->last_stage != NULL ||
@@ -3341,7 +2619,6 @@ static void idetape_empty_write_pipeline (ide_drive_t *drive)
 			tape->first_stage, tape->next_stage,
 			tape->last_stage, tape->nr_stages);
 	}
-#endif /* IDETAPE_DEBUG_BUGS */
 }
 
 static void idetape_restart_speed_control (ide_drive_t *drive)
@@ -3364,7 +2641,7 @@ static int idetape_initiate_read (ide_drive_t *drive, int max_stages)
 	idetape_stage_t *new_stage;
 	struct request rq;
 	int bytes_read;
-	int blocks = tape->capabilities.ctl;
+	u16 blocks = *(u16 *)&tape->caps[12];
 
 	/* Initialize read operation */
 	if (tape->chrdev_direction != idetape_direction_read) {
@@ -3372,12 +2649,10 @@ static int idetape_initiate_read (ide_drive_t *drive, int max_stages)
 			idetape_empty_write_pipeline(drive);
 			idetape_flush_tape_buffers(drive);
 		}
-#if IDETAPE_DEBUG_BUGS
 		if (tape->merge_stage || tape->merge_stage_size) {
 			printk (KERN_ERR "ide-tape: merge_stage_size should be 0 now\n");
 			tape->merge_stage_size = 0;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		if ((tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0)) == NULL)
 			return -ENOMEM;
 		tape->chrdev_direction = idetape_direction_read;
@@ -3478,12 +2753,10 @@ static int idetape_add_chrdev_read_request (ide_drive_t *drive,int blocks)
 		tape->pipeline_head++;
 		calculate_speeds(drive);
 	}
-#if IDETAPE_DEBUG_BUGS
 	if (bytes_read > blocks * tape->tape_block_size) {
 		printk(KERN_ERR "ide-tape: bug: trying to return more bytes than requested\n");
 		bytes_read = blocks * tape->tape_block_size;
 	}
-#endif /* IDETAPE_DEBUG_BUGS */
 	return (bytes_read);
 }
 
@@ -3567,16 +2840,21 @@ static int idetape_rewind_tape (ide_drive_t *drive)
 static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_config_t config;
 	void __user *argp = (void __user *)arg;
 
+	struct idetape_config {
+		int dsc_rw_frequency;
+		int dsc_media_access_frequency;
+		int nr_stages;
+	} config;
+
 #if IDETAPE_DEBUG_LOG	
 	if (tape->debug_level >= 4)
 		printk(KERN_INFO "ide-tape: Reached idetape_blkdev_ioctl\n");
 #endif /* IDETAPE_DEBUG_LOG */
 	switch (cmd) {
 		case 0x0340:
-			if (copy_from_user(&config, argp, sizeof (idetape_config_t)))
+			if (copy_from_user(&config, argp, sizeof(config)))
 				return -EFAULT;
 			tape->best_dsc_rw_frequency = config.dsc_rw_frequency;
 			tape->max_stages = config.nr_stages;
@@ -3584,7 +2862,7 @@ static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd, unsigned l
 		case 0x0350:
 			config.dsc_rw_frequency = (int) tape->best_dsc_rw_frequency;
 			config.nr_stages = tape->max_stages; 
-			if (copy_to_user(argp, &config, sizeof (idetape_config_t)))
+			if (copy_to_user(argp, &config, sizeof(config)))
 				return -EFAULT;
 			break;
 		default:
@@ -3608,11 +2886,12 @@ static int idetape_space_over_filemarks (ide_drive_t *drive,short mt_op,int mt_c
 	idetape_pc_t pc;
 	unsigned long flags;
 	int retval,count=0;
+	int sprev = !!(tape->caps[4] & 0x20);
 
 	if (mt_count == 0)
 		return 0;
 	if (MTBSF == mt_op || MTBSFM == mt_op) {
-		if (!tape->capabilities.sprev)
+		if (!sprev)
 			return -EIO;
 		mt_count = - mt_count;
 	}
@@ -3666,7 +2945,7 @@ static int idetape_space_over_filemarks (ide_drive_t *drive,short mt_op,int mt_c
 			return (idetape_queue_pc_tail(drive, &pc));
 		case MTFSFM:
 		case MTBSFM:
-			if (!tape->capabilities.sprev)
+			if (!sprev)
 				return (-EIO);
 			retval = idetape_space_over_filemarks(drive, MTFSF, mt_count-count);
 			if (retval) return (retval);
@@ -3703,6 +2982,7 @@ static ssize_t idetape_chrdev_read (struct file *file, char __user *buf,
 	ide_drive_t *drive = tape->drive;
 	ssize_t bytes_read,temp, actually_read = 0, rc;
 	ssize_t ret = 0;
+	u16 ctl = *(u16 *)&tape->caps[12];
 
 #if IDETAPE_DEBUG_LOG
 	if (tape->debug_level >= 3)
@@ -3728,7 +3008,7 @@ static ssize_t idetape_chrdev_read (struct file *file, char __user *buf,
 		count -= actually_read;
 	}
 	while (count >= tape->stage_size) {
-		bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
+		bytes_read = idetape_add_chrdev_read_request(drive, ctl);
 		if (bytes_read <= 0)
 			goto finish;
 		if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read))
@@ -3738,7 +3018,7 @@ static ssize_t idetape_chrdev_read (struct file *file, char __user *buf,
 		actually_read += bytes_read;
 	}
 	if (count) {
-		bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
+		bytes_read = idetape_add_chrdev_read_request(drive, ctl);
 		if (bytes_read <= 0)
 			goto finish;
 		temp = min((unsigned long)count, (unsigned long)bytes_read);
@@ -3767,6 +3047,7 @@ static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
 	ide_drive_t *drive = tape->drive;
 	ssize_t actually_written = 0;
 	ssize_t ret = 0;
+	u16 ctl = *(u16 *)&tape->caps[12];
 
 	/* The drive is write protected. */
 	if (tape->write_prot)
@@ -3782,13 +3063,11 @@ static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
 	if (tape->chrdev_direction != idetape_direction_write) {
 		if (tape->chrdev_direction == idetape_direction_read)
 			idetape_discard_read_pipeline(drive, 1);
-#if IDETAPE_DEBUG_BUGS
 		if (tape->merge_stage || tape->merge_stage_size) {
 			printk(KERN_ERR "ide-tape: merge_stage_size "
 				"should be 0 now\n");
 			tape->merge_stage_size = 0;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		if ((tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0)) == NULL)
 			return -ENOMEM;
 		tape->chrdev_direction = idetape_direction_write;
@@ -3816,12 +3095,10 @@ static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
 	if (tape->restart_speed_control_req)
 		idetape_restart_speed_control(drive);
 	if (tape->merge_stage_size) {
-#if IDETAPE_DEBUG_BUGS
 		if (tape->merge_stage_size >= tape->stage_size) {
 			printk(KERN_ERR "ide-tape: bug: merge buffer too big\n");
 			tape->merge_stage_size = 0;
 		}
-#endif /* IDETAPE_DEBUG_BUGS */
 		actually_written = min((unsigned int)(tape->stage_size - tape->merge_stage_size), (unsigned int)count);
 		if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written))
 				ret = -EFAULT;
@@ -3832,7 +3109,7 @@ static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
 		if (tape->merge_stage_size == tape->stage_size) {
 			ssize_t retval;
 			tape->merge_stage_size = 0;
-			retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
+			retval = idetape_add_chrdev_write_request(drive, ctl);
 			if (retval <= 0)
 				return (retval);
 		}
@@ -3843,7 +3120,7 @@ static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
 			ret = -EFAULT;
 		buf += tape->stage_size;
 		count -= tape->stage_size;
-		retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
+		retval = idetape_add_chrdev_write_request(drive, ctl);
 		actually_written += tape->stage_size;
 		if (retval <= 0)
 			return (retval);
@@ -3871,69 +3148,20 @@ static int idetape_write_filemark (ide_drive_t *drive)
 }
 
 /*
- *	idetape_mtioctop is called from idetape_chrdev_ioctl when
- *	the general mtio MTIOCTOP ioctl is requested.
- *
- *	We currently support the following mtio.h operations:
+ * Called from idetape_chrdev_ioctl when the general mtio MTIOCTOP ioctl is
+ * requested.
  *
- *	MTFSF	-	Space over mt_count filemarks in the positive direction.
- *			The tape is positioned after the last spaced filemark.
+ * Note: MTBSF and MTBSFM are not supported when the tape doesn't support
+ * spacing over filemarks in the reverse direction. In this case, MTFSFM is also
+ * usually not supported (it is supported in the rare case in which we crossed
+ * the filemark during our read-ahead pipelined operation mode).
  *
- *	MTFSFM	-	Same as MTFSF, but the tape is positioned before the
- *			last filemark.
+ * The following commands are currently not supported:
  *
- *	MTBSF	-	Steps background over mt_count filemarks, tape is
- *			positioned before the last filemark.
- *
- *	MTBSFM	-	Like MTBSF, only tape is positioned after the last filemark.
- *
- *	Note:
- *
- *		MTBSF and MTBSFM are not supported when the tape doesn't
- *		support spacing over filemarks in the reverse direction.
- *		In this case, MTFSFM is also usually not supported (it is
- *		supported in the rare case in which we crossed the filemark
- *		during our read-ahead pipelined operation mode).
- *		
- *	MTWEOF	-	Writes mt_count filemarks. Tape is positioned after
- *			the last written filemark.
- *
- *	MTREW	-	Rewinds tape.
- *
- *	MTLOAD	-	Loads the tape.
- *
- *	MTOFFL	-	Puts the tape drive "Offline": Rewinds the tape and
- *	MTUNLOAD	prevents further access until the media is replaced.
- *
- *	MTNOP	-	Flushes tape buffers.
- *
- *	MTRETEN	-	Retension media. This typically consists of one end
- *			to end pass on the media.
- *
- *	MTEOM	-	Moves to the end of recorded data.
- *
- *	MTERASE	-	Erases tape.
- *
- *	MTSETBLK - 	Sets the user block size to mt_count bytes. If
- *			mt_count is 0, we will attempt to autodetect
- *			the block size.
- *
- *	MTSEEK	-	Positions the tape in a specific block number, where
- *			each block is assumed to contain which user_block_size
- *			bytes.
- *
- *	MTSETPART - 	Switches to another tape partition.
- *
- *	MTLOCK - 	Locks the tape door.
- *
- *	MTUNLOCK - 	Unlocks the tape door.
- *
- *	The following commands are currently not supported:
- *
- *	MTFSS, MTBSS, MTWSM, MTSETDENSITY,
- *	MTSETDRVBUFFER, MT_ST_BOOLEANS, MT_ST_WRITE_THRESHOLD.
+ * MTFSS, MTBSS, MTWSM, MTSETDENSITY, MTSETDRVBUFFER, MT_ST_BOOLEANS,
+ * MT_ST_WRITE_THRESHOLD.
  */
-static int idetape_mtioctop (ide_drive_t *drive,short mt_op,int mt_count)
+static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	idetape_pc_t pc;
@@ -4048,29 +3276,12 @@ static int idetape_mtioctop (ide_drive_t *drive,short mt_op,int mt_count)
 }
 
 /*
- *	Our character device ioctls.
- *
- *	General mtio.h magnetic io commands are supported here, and not in
- *	the corresponding block interface.
- *
- *	The following ioctls are supported:
- *
- *	MTIOCTOP -	Refer to idetape_mtioctop for detailed description.
- *
- *	MTIOCGET - 	The mt_dsreg field in the returned mtget structure
- *			will be set to (user block size in bytes <<
- *			MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK.
- *
- *			The mt_blkno is set to the current user block number.
- *			The other mtget fields are not supported.
- *
- *	MTIOCPOS -	The current tape "block position" is returned. We
- *			assume that each block contains user_block_size
- *			bytes.
- *
- *	Our own ide-tape ioctls are supported on both interfaces.
+ * Our character device ioctls. General mtio.h magnetic io commands are
+ * supported here, and not in the corresponding block interface. Our own
+ * ide-tape ioctls are supported on both interfaces.
  */
-static int idetape_chrdev_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
+				unsigned int cmd, unsigned long arg)
 {
 	struct ide_tape_obj *tape = ide_tape_f(file);
 	ide_drive_t *drive = tape->drive;
@@ -4124,7 +3335,30 @@ static int idetape_chrdev_ioctl (struct inode *inode, struct file *file, unsigne
 	}
 }
 
-static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive);
+/*
+ * Do a mode sense page 0 with block descriptor and if it succeeds set the tape
+ * block size with the reported value.
+ */
+static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
+{
+	idetape_tape_t *tape = drive->driver_data;
+	idetape_pc_t pc;
+
+	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
+	if (idetape_queue_pc_tail(drive, &pc)) {
+		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
+		if (tape->tape_block_size == 0) {
+			printk(KERN_WARNING "ide-tape: Cannot deal with zero "
+					    "block size, assuming 32k\n");
+			tape->tape_block_size = 32768;
+		}
+		return;
+	}
+	tape->tape_block_size = (pc.buffer[4 + 5] << 16) +
+				(pc.buffer[4 + 6] << 8)  +
+				 pc.buffer[4 + 7];
+	tape->drv_write_prot = (pc.buffer[2] & 0x80) >> 7;
+}
 
 /*
  *	Our character device open function.
@@ -4178,7 +3412,7 @@ static int idetape_chrdev_open (struct inode *inode, struct file *filp)
 		clear_bit(IDETAPE_PIPELINE_ERROR, &tape->flags);
 
 	/* Read block size and write protect status from drive. */
-	idetape_get_blocksize_from_block_descriptor(drive);
+	ide_tape_get_bsize_from_bdesc(drive);
 
 	/* Set write protect flag if device is opened as read-only. */
 	if ((filp->f_flags & O_ACCMODE) == O_RDONLY)
@@ -4296,190 +3530,100 @@ static int idetape_identify_device (ide_drive_t *drive)
 
 	*((unsigned short *) &gcw) = id->config;
 
-#if IDETAPE_DEBUG_INFO
-	printk(KERN_INFO "ide-tape: Dumping ATAPI Identify Device tape parameters\n");
-	printk(KERN_INFO "ide-tape: Protocol Type: ");
-	switch (gcw.protocol) {
-		case 0: case 1: printk("ATA\n");break;
-		case 2:	printk("ATAPI\n");break;
-		case 3: printk("Reserved (Unknown to ide-tape)\n");break;
-	}
-	printk(KERN_INFO "ide-tape: Device Type: %x - ",gcw.device_type);	
-	switch (gcw.device_type) {
-		case 0: printk("Direct-access Device\n");break;
-		case 1: printk("Streaming Tape Device\n");break;
-		case 2: case 3: case 4: printk("Reserved\n");break;
-		case 5: printk("CD-ROM Device\n");break;
-		case 6: printk("Reserved\n");
-		case 7: printk("Optical memory Device\n");break;
-		case 0x1f: printk("Unknown or no Device type\n");break;
-		default: printk("Reserved\n");
-	}
-	printk(KERN_INFO "ide-tape: Removable: %s",gcw.removable ? "Yes\n":"No\n");	
-	printk(KERN_INFO "ide-tape: Command Packet DRQ Type: ");
-	switch (gcw.drq_type) {
-		case 0: printk("Microprocessor DRQ\n");break;
-		case 1: printk("Interrupt DRQ\n");break;
-		case 2: printk("Accelerated DRQ\n");break;
-		case 3: printk("Reserved\n");break;
-	}
-	printk(KERN_INFO "ide-tape: Command Packet Size: ");
-	switch (gcw.packet_size) {
-		case 0: printk("12 bytes\n");break;
-		case 1: printk("16 bytes\n");break;
-		default: printk("Reserved\n");break;
-	}
-#endif /* IDETAPE_DEBUG_INFO */
-
 	/* Check that we can support this device */
 
-	if (gcw.protocol !=2 )
-		printk(KERN_ERR "ide-tape: Protocol is not ATAPI\n");
+	if (gcw.protocol != 2)
+		printk(KERN_ERR "ide-tape: Protocol (0x%02x) is not ATAPI\n",
+				gcw.protocol);
 	else if (gcw.device_type != 1)
-		printk(KERN_ERR "ide-tape: Device type is not set to tape\n");
+		printk(KERN_ERR "ide-tape: Device type (0x%02x) is not set "
+				"to tape\n", gcw.device_type);
 	else if (!gcw.removable)
 		printk(KERN_ERR "ide-tape: The removable flag is not set\n");
 	else if (gcw.packet_size != 0) {
-		printk(KERN_ERR "ide-tape: Packet size is not 12 bytes long\n");
-		if (gcw.packet_size == 1)
-			printk(KERN_ERR "ide-tape: Sorry, padding to 16 bytes is still not supported\n");
+		printk(KERN_ERR "ide-tape: Packet size (0x%02x) is not 12 "
+				"bytes long\n", gcw.packet_size);
 	} else
 		return 1;
 	return 0;
 }
 
-/*
- * Use INQUIRY to get the firmware revision
- */
-static void idetape_get_inquiry_results (ide_drive_t *drive)
+static void idetape_get_inquiry_results(ide_drive_t *drive)
 {
 	char *r;
 	idetape_tape_t *tape = drive->driver_data;
 	idetape_pc_t pc;
-	idetape_inquiry_result_t *inquiry;
-	
+
 	idetape_create_inquiry_cmd(&pc);
 	if (idetape_queue_pc_tail(drive, &pc)) {
-		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n", tape->name);
+		printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
+				tape->name);
 		return;
 	}
-	inquiry = (idetape_inquiry_result_t *) pc.buffer;
-	memcpy(tape->vendor_id, inquiry->vendor_id, 8);
-	memcpy(tape->product_id, inquiry->product_id, 16);
-	memcpy(tape->firmware_revision, inquiry->revision_level, 4);
+	memcpy(tape->vendor_id, &pc.buffer[8], 8);
+	memcpy(tape->product_id, &pc.buffer[16], 16);
+	memcpy(tape->firmware_revision, &pc.buffer[32], 4);
+
 	ide_fixstring(tape->vendor_id, 10, 0);
 	ide_fixstring(tape->product_id, 18, 0);
 	ide_fixstring(tape->firmware_revision, 6, 0);
 	r = tape->firmware_revision;
 	if (*(r + 1) == '.')
-		tape->firmware_revision_num = (*r - '0') * 100 + (*(r + 2) - '0') * 10 + *(r + 3) - '0';
-	printk(KERN_INFO "ide-tape: %s <-> %s: %s %s rev %s\n", drive->name, tape->name, tape->vendor_id, tape->product_id, tape->firmware_revision);
+		tape->firmware_revision_num = (*r - '0') * 100 +
+			(*(r + 2) - '0') * 10 +	*(r + 3) - '0';
+	printk(KERN_INFO "ide-tape: %s <-> %s: %s %s rev %s\n",
+			drive->name, tape->name, tape->vendor_id,
+			tape->product_id, tape->firmware_revision);
 }
 
 /*
- *	idetape_get_mode_sense_results asks the tape about its various
- *	parameters. In particular, we will adjust our data transfer buffer
- *	size to the recommended value as returned by the tape.
+ * Ask the tape about its various parameters. In particular, we will adjust our
+ * data transfer buffer	size to the recommended value as returned by the tape.
  */
 static void idetape_get_mode_sense_results (ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	idetape_pc_t pc;
-	idetape_mode_parameter_header_t *header;
-	idetape_capabilities_page_t *capabilities;
-	
+	u8 *caps;
+	u8 speed, max_speed;
+
 	idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
 	if (idetape_queue_pc_tail(drive, &pc)) {
-		printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming some default values\n");
+		printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
+				" some default values\n");
 		tape->tape_block_size = 512;
-		tape->capabilities.ctl = 52;
-		tape->capabilities.speed = 450;
-		tape->capabilities.buffer_size = 6 * 52;
+		put_unaligned(52,   (u16 *)&tape->caps[12]);
+		put_unaligned(540,  (u16 *)&tape->caps[14]);
+		put_unaligned(6*52, (u16 *)&tape->caps[16]);
 		return;
 	}
-	header = (idetape_mode_parameter_header_t *) pc.buffer;
-	capabilities = (idetape_capabilities_page_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t) + header->bdl);
+	caps = pc.buffer + 4 + pc.buffer[3];
 
-	capabilities->max_speed = ntohs(capabilities->max_speed);
-	capabilities->ctl = ntohs(capabilities->ctl);
-	capabilities->speed = ntohs(capabilities->speed);
-	capabilities->buffer_size = ntohs(capabilities->buffer_size);
+	/* convert to host order and save for later use */
+	speed = be16_to_cpu(*(u16 *)&caps[14]);
+	max_speed = be16_to_cpu(*(u16 *)&caps[8]);
 
-	if (!capabilities->speed) {
-		printk(KERN_INFO "ide-tape: %s: overriding capabilities->speed (assuming 650KB/sec)\n", drive->name);
-		capabilities->speed = 650;
+	put_unaligned(max_speed, (u16 *)&caps[8]);
+	put_unaligned(be16_to_cpu(*(u16 *)&caps[12]), (u16 *)&caps[12]);
+	put_unaligned(speed, (u16 *)&caps[14]);
+	put_unaligned(be16_to_cpu(*(u16 *)&caps[16]), (u16 *)&caps[16]);
+
+	if (!speed) {
+		printk(KERN_INFO "ide-tape: %s: invalid tape speed "
+				"(assuming 650KB/sec)\n", drive->name);
+		put_unaligned(650, (u16 *)&caps[14]);
 	}
-	if (!capabilities->max_speed) {
-		printk(KERN_INFO "ide-tape: %s: overriding capabilities->max_speed (assuming 650KB/sec)\n", drive->name);
-		capabilities->max_speed = 650;
+	if (!max_speed) {
+		printk(KERN_INFO "ide-tape: %s: invalid max_speed "
+				"(assuming 650KB/sec)\n", drive->name);
+		put_unaligned(650, (u16 *)&caps[8]);
 	}
 
-	tape->capabilities = *capabilities;		/* Save us a copy */
-	if (capabilities->blk512)
+	memcpy(&tape->caps, caps, 20);
+	if (caps[7] & 0x02)
 		tape->tape_block_size = 512;
-	else if (capabilities->blk1024)
+	else if (caps[7] & 0x04)
 		tape->tape_block_size = 1024;
-
-#if IDETAPE_DEBUG_INFO
-	printk(KERN_INFO "ide-tape: Dumping the results of the MODE SENSE packet command\n");
-	printk(KERN_INFO "ide-tape: Mode Parameter Header:\n");
-	printk(KERN_INFO "ide-tape: Mode Data Length - %d\n",header->mode_data_length);
-	printk(KERN_INFO "ide-tape: Medium Type - %d\n",header->medium_type);
-	printk(KERN_INFO "ide-tape: Device Specific Parameter - %d\n",header->dsp);
-	printk(KERN_INFO "ide-tape: Block Descriptor Length - %d\n",header->bdl);
-	
-	printk(KERN_INFO "ide-tape: Capabilities and Mechanical Status Page:\n");
-	printk(KERN_INFO "ide-tape: Page code - %d\n",capabilities->page_code);
-	printk(KERN_INFO "ide-tape: Page length - %d\n",capabilities->page_length);
-	printk(KERN_INFO "ide-tape: Read only - %s\n",capabilities->ro ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports reverse space - %s\n",capabilities->sprev ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports erase initiated formatting - %s\n",capabilities->efmt ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports QFA two Partition format - %s\n",capabilities->qfa ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports locking the medium - %s\n",capabilities->lock ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: The volume is currently locked - %s\n",capabilities->locked ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: The device defaults in the prevent state - %s\n",capabilities->prevent ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports ejecting the medium - %s\n",capabilities->eject ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports error correction - %s\n",capabilities->ecc ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports data compression - %s\n",capabilities->cmprs ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports 512 bytes block size - %s\n",capabilities->blk512 ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports 1024 bytes block size - %s\n",capabilities->blk1024 ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Supports 32768 bytes block size / Restricted byte count for PIO transfers - %s\n",capabilities->blk32768 ? "Yes":"No");
-	printk(KERN_INFO "ide-tape: Maximum supported speed in KBps - %d\n",capabilities->max_speed);
-	printk(KERN_INFO "ide-tape: Continuous transfer limits in blocks - %d\n",capabilities->ctl);
-	printk(KERN_INFO "ide-tape: Current speed in KBps - %d\n",capabilities->speed);	
-	printk(KERN_INFO "ide-tape: Buffer size - %d\n",capabilities->buffer_size*512);
-#endif /* IDETAPE_DEBUG_INFO */
-}
-
-/*
- *	ide_get_blocksize_from_block_descriptor does a mode sense page 0 with block descriptor
- *	and if it succeeds sets the tape block size with the reported value
- */
-static void idetape_get_blocksize_from_block_descriptor(ide_drive_t *drive)
-{
-
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
-	idetape_mode_parameter_header_t *header;
-	idetape_parameter_block_descriptor_t *block_descrp;
-	
-	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
-	if (idetape_queue_pc_tail(drive, &pc)) {
-		printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
-		if (tape->tape_block_size == 0) {
-			printk(KERN_WARNING "ide-tape: Cannot deal with zero block size, assume 32k\n");
-			tape->tape_block_size =  32768;
-		}
-		return;
-	}
-	header = (idetape_mode_parameter_header_t *) pc.buffer;
-	block_descrp = (idetape_parameter_block_descriptor_t *) (pc.buffer + sizeof(idetape_mode_parameter_header_t));
-	tape->tape_block_size =( block_descrp->length[0]<<16) + (block_descrp->length[1]<<8) + block_descrp->length[2];
-	tape->drv_write_prot = (header->dsp & 0x80) >> 7;
-
-#if IDETAPE_DEBUG_INFO
-	printk(KERN_INFO "ide-tape: Adjusted block size - %d\n", tape->tape_block_size);
-#endif /* IDETAPE_DEBUG_INFO */
 }
 
 #ifdef CONFIG_IDE_PROC_FS
@@ -4490,13 +3634,15 @@ static void idetape_add_settings (ide_drive_t *drive)
 /*
  *			drive	setting name		read/write	data type	min			max			mul_factor			div_factor	data pointer				set function
  */
-	ide_add_setting(drive,	"buffer",		SETTING_READ,	TYPE_SHORT,	0,			0xffff,			1,				2,		&tape->capabilities.buffer_size,	NULL);
+	ide_add_setting(drive, "buffer", SETTING_READ, TYPE_SHORT, 0, 0xffff,
+			1, 2, (u16 *)&tape->caps[16], NULL);
 	ide_add_setting(drive,	"pipeline_min",		SETTING_RW,	TYPE_INT,	1,			0xffff,			tape->stage_size / 1024,	1,		&tape->min_pipeline,			NULL);
 	ide_add_setting(drive,	"pipeline",		SETTING_RW,	TYPE_INT,	1,			0xffff,			tape->stage_size / 1024,	1,		&tape->max_stages,			NULL);
 	ide_add_setting(drive,	"pipeline_max",		SETTING_RW,	TYPE_INT,	1,			0xffff,			tape->stage_size / 1024,	1,		&tape->max_pipeline,			NULL);
 	ide_add_setting(drive,	"pipeline_used",	SETTING_READ,	TYPE_INT,	0,			0xffff,			tape->stage_size / 1024,	1,		&tape->nr_stages,			NULL);
 	ide_add_setting(drive,	"pipeline_pending",	SETTING_READ,	TYPE_INT,	0,			0xffff,			tape->stage_size / 1024,	1,		&tape->nr_pending_stages,		NULL);
-	ide_add_setting(drive,	"speed",		SETTING_READ,	TYPE_SHORT,	0,			0xffff,			1,				1,		&tape->capabilities.speed,		NULL);
+	ide_add_setting(drive, "speed", SETTING_READ, TYPE_SHORT, 0, 0xffff,
+			1, 1, (u16 *)&tape->caps[14], NULL);
 	ide_add_setting(drive,	"stage",		SETTING_READ,	TYPE_INT,	0,			0xffff,			1,				1024,		&tape->stage_size,			NULL);
 	ide_add_setting(drive,	"tdsc",			SETTING_RW,	TYPE_INT,	IDETAPE_DSC_RW_MIN,	IDETAPE_DSC_RW_MAX,	1000,				HZ,		&tape->best_dsc_rw_frequency,		NULL);
 	ide_add_setting(drive,	"dsc_overlap",		SETTING_RW,	TYPE_BYTE,	0,			1,			1,				1,		&drive->dsc_overlap,			NULL);
@@ -4528,6 +3674,7 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 	struct idetape_id_gcw gcw;
 	int stage_size;
 	struct sysinfo si;
+	u16 *ctl = (u16 *)&tape->caps[12];
 
 	spin_lock_init(&tape->spinlock);
 	drive->dsc_overlap = 1;
@@ -4555,13 +3702,13 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 	
 	idetape_get_inquiry_results(drive);
 	idetape_get_mode_sense_results(drive);
-	idetape_get_blocksize_from_block_descriptor(drive);
+	ide_tape_get_bsize_from_bdesc(drive);
 	tape->user_bs_factor = 1;
-	tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
+	tape->stage_size = *ctl * tape->tape_block_size;
 	while (tape->stage_size > 0xffff) {
 		printk(KERN_NOTICE "ide-tape: decreasing stage size\n");
-		tape->capabilities.ctl /= 2;
-		tape->stage_size = tape->capabilities.ctl * tape->tape_block_size;
+		*ctl /= 2;
+		tape->stage_size = *ctl * tape->tape_block_size;
 	}
 	stage_size = tape->stage_size;
 	tape->pages_per_stage = stage_size / PAGE_SIZE;
@@ -4570,11 +3717,8 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 		tape->excess_bh_size = PAGE_SIZE - stage_size % PAGE_SIZE;
 	}
 
-	/*
-	 *	Select the "best" DSC read/write polling frequency
-	 *	and pipeline size.
-	 */
-	speed = max(tape->capabilities.speed, tape->capabilities.max_speed);
+	/* Select the "best" DSC read/write polling freq and pipeline size. */
+	speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]);
 
 	tape->max_stages = speed * 1000 * 10 / tape->stage_size;
 
@@ -4591,7 +3735,7 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 		tape->max_stages = tape->min_pipeline = tape->max_pipeline = 1;
 
 	t1 = (tape->stage_size * HZ) / (speed * 1000);
-	tmid = (tape->capabilities.buffer_size * 32 * HZ) / (speed * 125);
+	tmid = (*(u16 *)&tape->caps[16] * 32 * HZ) / (speed * 125);
 	tn = (IDETAPE_FIFO_THRESHOLD * tape->stage_size * HZ) / (speed * 1000);
 
 	if (tape->max_stages)
@@ -4606,8 +3750,8 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
 	tape->best_dsc_rw_frequency = max_t(unsigned long, min_t(unsigned long, t, IDETAPE_DSC_RW_MAX), IDETAPE_DSC_RW_MIN);
 	printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
 		"%dkB pipeline, %lums tDSC%s\n",
-		drive->name, tape->name, tape->capabilities.speed,
-		(tape->capabilities.buffer_size * 512) / tape->stage_size,
+		drive->name, tape->name, *(u16 *)&tape->caps[14],
+		(*(u16 *)&tape->caps[16] * 512) / tape->stage_size,
 		tape->stage_size / 1024,
 		tape->max_stages * tape->stage_size / 1024,
 		tape->best_dsc_rw_frequency * 1000 / HZ,
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 16a9a58..4e1da1c 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -755,6 +755,7 @@ int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 	u8 args[4], xfer_rate = 0;
 	ide_task_t tfargs;
 	struct ide_taskfile *tf = &tfargs.tf;
+	struct hd_driveid *id = drive->id;
 
 	if (NULL == (void *) arg) {
 		struct request rq;
@@ -792,10 +793,16 @@ int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 			return -ENOMEM;
 	}
 
-	if (set_transfer(drive, &tfargs)) {
+	if (tf->command == WIN_SETFEATURES &&
+	    tf->feature == SETFEATURES_XFER &&
+	    tf->nsect >= XFER_SW_DMA_0 &&
+	    (id->dma_ultra || id->dma_mword || id->dma_1word)) {
 		xfer_rate = args[1];
-		if (ide_ata66_check(drive, &tfargs))
+		if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
+			printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
+					    "be set\n", drive->name);
 			goto abort;
+		}
 	}
 
 	err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index ab9ca2b..ac61360 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -499,6 +499,8 @@ void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
 /**
  *	ide_unregister		-	free an IDE interface
  *	@index: index of interface (will change soon to a pointer)
+ *	@init_default: init default hwif flag
+ *	@restore: restore hwif flag
  *
  *	Perform the final unregister of an IDE interface. At the moment
  *	we don't refcount interfaces so this will also get split up.
@@ -518,7 +520,7 @@ void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
  *	This is raving bonkers.
  */
 
-void ide_unregister(unsigned int index)
+void ide_unregister(unsigned int index, int init_default, int restore)
 {
 	ide_drive_t *drive;
 	ide_hwif_t *hwif, *g;
@@ -602,9 +604,12 @@ void ide_unregister(unsigned int index)
 
 	/* restore hwif data to pristine status */
 	ide_init_port_data(hwif, index);
-	init_hwif_default(hwif, index);
 
-	ide_hwif_restore(hwif, &tmp_hwif);
+	if (init_default)
+		init_hwif_default(hwif, index);
+
+	if (restore)
+		ide_hwif_restore(hwif, &tmp_hwif);
 
 abort:
 	spin_unlock_irq(&ide_lock);
@@ -678,6 +683,31 @@ void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 }
 EXPORT_SYMBOL_GPL(ide_init_port_hw);
 
+ide_hwif_t *ide_deprecated_find_port(unsigned long base)
+{
+	ide_hwif_t *hwif;
+	int i;
+
+	for (i = 0; i < MAX_HWIFS; i++) {
+		hwif = &ide_hwifs[i];
+		if (hwif->io_ports[IDE_DATA_OFFSET] == base)
+			goto found;
+	}
+
+	for (i = 0; i < MAX_HWIFS; i++) {
+		hwif = &ide_hwifs[i];
+		if (hwif->hold)
+			continue;
+		if (!hwif->present && hwif->mate == NULL)
+			goto found;
+	}
+
+	hwif = NULL;
+found:
+	return hwif;
+}
+EXPORT_SYMBOL_GPL(ide_deprecated_find_port);
+
 /**
  *	ide_register_hw		-	register IDE interface
  *	@hw: hardware registers
@@ -697,38 +727,26 @@ int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
 	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 
 	do {
-		for (index = 0; index < MAX_HWIFS; ++index) {
-			hwif = &ide_hwifs[index];
-			if (hwif->io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET])
-				goto found;
-		}
-		for (index = 0; index < MAX_HWIFS; ++index) {
-			hwif = &ide_hwifs[index];
-			if (hwif->hold)
-				continue;
-			if (!hwif->present && hwif->mate == NULL)
-				goto found;
-		}
+		hwif = ide_deprecated_find_port(hw->io_ports[IDE_DATA_OFFSET]);
+		index = hwif->index;
+		if (hwif)
+			goto found;
 		for (index = 0; index < MAX_HWIFS; index++)
-			ide_unregister(index);
+			ide_unregister(index, 1, 1);
 	} while (retry--);
 	return -1;
 found:
 	if (hwif->present)
-		ide_unregister(index);
-	else if (!hwif->hold) {
+		ide_unregister(index, 0, 1);
+	else if (!hwif->hold)
 		ide_init_port_data(hwif, index);
-		init_hwif_default(hwif, index);
-	}
-	if (hwif->present)
-		return -1;
 
 	ide_init_port_hw(hwif, hw);
 	hwif->quirkproc = quirkproc;
 
 	idx[0] = index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, NULL);
 
 	if (hwifp)
 		*hwifp = hwif;
@@ -791,10 +809,6 @@ int set_io_32bit(ide_drive_t *drive, int arg)
 		return -EBUSY;
 
 	drive->io_32bit = arg;
-#ifdef CONFIG_BLK_DEV_DTC2278
-	if (HWIF(drive)->chipset == ide_dtc2278)
-		HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg;
-#endif /* CONFIG_BLK_DEV_DTC2278 */
 
 	spin_unlock_irq(&ide_lock);
 
@@ -1021,11 +1035,8 @@ int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device
 		case HDIO_GET_NICE:
 			return put_user(drive->dsc_overlap	<<	IDE_NICE_DSC_OVERLAP	|
 					drive->atapi_overlap	<<	IDE_NICE_ATAPI_OVERLAP	|
-					drive->nice0		<< 	IDE_NICE_0		|
-					drive->nice1		<<	IDE_NICE_1		|
-					drive->nice2		<<	IDE_NICE_2,
+					drive->nice1 << IDE_NICE_1,
 					(long __user *) arg);
-
 #ifdef CONFIG_IDE_TASK_IOCTL
 		case HDIO_DRIVE_TASKFILE:
 		        if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
@@ -1066,7 +1077,7 @@ int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device
 	        case HDIO_UNREGISTER_HWIF:
 			if (!capable(CAP_SYS_RAWIO)) return -EACCES;
 			/* (arg > MAX_HWIFS) checked in function */
-			ide_unregister(arg);
+			ide_unregister(arg, 1, 1);
 			return 0;
 		case HDIO_SET_NICE:
 			if (!capable(CAP_SYS_ADMIN)) return -EACCES;
@@ -1711,7 +1722,7 @@ void __exit cleanup_module (void)
 	int index;
 
 	for (index = 0; index < MAX_HWIFS; ++index)
-		ide_unregister(index);
+		ide_unregister(index, 0, 0);
 
 	proc_ide_destroy();
 
diff --git a/drivers/ide/legacy/ali14xx.c b/drivers/ide/legacy/ali14xx.c
index e3ea209..d4d1a6b 100644
--- a/drivers/ide/legacy/ali14xx.c
+++ b/drivers/ide/legacy/ali14xx.c
@@ -191,9 +191,14 @@ static int __init initRegisters (void) {
 	return t;
 }
 
+static const struct ide_port_info ali14xx_port_info = {
+	.chipset		= ide_ali14xx,
+	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
+	.pio_mask		= ATA_PIO4,
+};
+
 static int __init ali14xx_probe(void)
 {
-	ide_hwif_t *hwif, *mate;
 	static u8 idx[4] = { 0, 1, 0xff, 0xff };
 
 	printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n",
@@ -205,21 +210,10 @@ static int __init ali14xx_probe(void)
 		return 1;
 	}
 
-	hwif = &ide_hwifs[0];
-	mate = &ide_hwifs[1];
-
-	hwif->chipset = ide_ali14xx;
-	hwif->pio_mask = ATA_PIO4;
-	hwif->set_pio_mode = &ali14xx_set_pio_mode;
-	hwif->mate = mate;
-
-	mate->chipset = ide_ali14xx;
-	mate->pio_mask = ATA_PIO4;
-	mate->set_pio_mode = &ali14xx_set_pio_mode;
-	mate->mate = hwif;
-	mate->channel = 1;
+	ide_hwifs[0].set_pio_mode = &ali14xx_set_pio_mode;
+	ide_hwifs[1].set_pio_mode = &ali14xx_set_pio_mode;
 
-	ide_device_add(idx);
+	ide_device_add(idx, &ali14xx_port_info);
 
 	return 0;
 }
diff --git a/drivers/ide/legacy/buddha.c b/drivers/ide/legacy/buddha.c
index dd3d198..8bdb79d 100644
--- a/drivers/ide/legacy/buddha.c
+++ b/drivers/ide/legacy/buddha.c
@@ -232,7 +232,7 @@ fail_base2:
 			}
 		}
 
-		ide_device_add(idx);
+		ide_device_add(idx, NULL);
 	}
 
 	return 0;
diff --git a/drivers/ide/legacy/dtc2278.c b/drivers/ide/legacy/dtc2278.c
index 611c970..73396f7 100644
--- a/drivers/ide/legacy/dtc2278.c
+++ b/drivers/ide/legacy/dtc2278.c
@@ -84,14 +84,20 @@ static void dtc2278_set_pio_mode(ide_drive_t *drive, const u8 pio)
 		/* Actually we do - there is a data sheet available for the
 		   Winbond but does anyone actually care */
 	}
-
-	/*
-	 * 32bit I/O has to be enabled for *both* drives at the same time.
-	 */
-	drive->io_32bit = 1;
-	HWIF(drive)->drives[!drive->select.b.unit].io_32bit = 1;
 }
 
+static const struct ide_port_info dtc2278_port_info __initdata = {
+	.chipset		= ide_dtc2278,
+	.host_flags		= IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_UNMASK_IRQS |
+				  IDE_HFLAG_IO_32BIT |
+				  /* disallow ->io_32bit changes */
+				  IDE_HFLAG_NO_IO_32BIT |
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_NO_AUTOTUNE,
+	.pio_mask		= ATA_PIO4,
+};
+
 static int __init dtc2278_probe(void)
 {
 	unsigned long flags;
@@ -122,23 +128,9 @@ static int __init dtc2278_probe(void)
 #endif
 	local_irq_restore(flags);
 
-	hwif->serialized = 1;
-	hwif->chipset = ide_dtc2278;
-	hwif->pio_mask = ATA_PIO4;
 	hwif->set_pio_mode = &dtc2278_set_pio_mode;
-	hwif->drives[0].no_unmask = 1;
-	hwif->drives[1].no_unmask = 1;
-	hwif->mate = mate;
-
-	mate->serialized = 1;
-	mate->chipset = ide_dtc2278;
-	mate->pio_mask = ATA_PIO4;
-	mate->drives[0].no_unmask = 1;
-	mate->drives[1].no_unmask = 1;
-	mate->mate = hwif;
-	mate->channel = 1;
-
-	ide_device_add(idx);
+
+	ide_device_add(idx, &dtc2278_port_info);
 
 	return 0;
 }
diff --git a/drivers/ide/legacy/falconide.c b/drivers/ide/legacy/falconide.c
index c9bd6bf..85b69a8 100644
--- a/drivers/ide/legacy/falconide.c
+++ b/drivers/ide/legacy/falconide.c
@@ -83,7 +83,7 @@ static int __init falconide_init(void)
 		ide_init_port_data(hwif, index);
 		ide_init_port_hw(hwif, &hw);
 
-		ide_device_add(idx);
+		ide_device_add(idx, NULL);
 	}
     }
 
diff --git a/drivers/ide/legacy/gayle.c b/drivers/ide/legacy/gayle.c
index f67c51a..fc29ce7 100644
--- a/drivers/ide/legacy/gayle.c
+++ b/drivers/ide/legacy/gayle.c
@@ -186,7 +186,7 @@ found:
 	    release_mem_region(res_start, res_n);
     }
 
-    ide_device_add(idx);
+    ide_device_add(idx, NULL);
 
     return 0;
 }
diff --git a/drivers/ide/legacy/ht6560b.c b/drivers/ide/legacy/ht6560b.c
index 57bc15c..02d12c7 100644
--- a/drivers/ide/legacy/ht6560b.c
+++ b/drivers/ide/legacy/ht6560b.c
@@ -300,16 +300,36 @@ static void ht6560b_set_pio_mode(ide_drive_t *drive, const u8 pio)
 #endif
 }
 
+static void __init ht6560b_port_init_devs(ide_hwif_t *hwif)
+{
+	/* Setting default configurations for drives. */
+	int t = (HT_CONFIG_DEFAULT << 8) | HT_TIMING_DEFAULT;
+
+	if (hwif->channel)
+		t |= (HT_SECONDARY_IF << 8);
+
+	hwif->drives[0].drive_data = t;
+	hwif->drives[1].drive_data = t;
+}
+
 int probe_ht6560b = 0;
 
 module_param_named(probe, probe_ht6560b, bool, 0);
 MODULE_PARM_DESC(probe, "probe for HT6560B chipset");
 
+static const struct ide_port_info ht6560b_port_info __initdata = {
+	.chipset		= ide_ht6560b,
+	.host_flags		= IDE_HFLAG_SERIALIZE | /* is this needed? */
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_NO_AUTOTUNE |
+				  IDE_HFLAG_ABUSE_PREFETCH,
+	.pio_mask		= ATA_PIO5,
+};
+
 static int __init ht6560b_init(void)
 {
 	ide_hwif_t *hwif, *mate;
 	static u8 idx[4] = { 0, 1, 0xff, 0xff };
-	int t;
 
 	if (probe_ht6560b == 0)
 		return -ENODEV;
@@ -328,36 +348,16 @@ static int __init ht6560b_init(void)
 		goto release_region;
 	}
 
-	hwif->chipset = ide_ht6560b;
 	hwif->selectproc = &ht6560b_selectproc;
-	hwif->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
-	hwif->pio_mask = ATA_PIO5;
 	hwif->set_pio_mode = &ht6560b_set_pio_mode;
-	hwif->serialized = 1;	/* is this needed? */
-	hwif->mate = mate;
 
-	mate->chipset = ide_ht6560b;
 	mate->selectproc = &ht6560b_selectproc;
-	mate->host_flags = IDE_HFLAG_ABUSE_PREFETCH;
-	mate->pio_mask = ATA_PIO5;
 	mate->set_pio_mode = &ht6560b_set_pio_mode;
-	mate->serialized = 1;	/* is this needed? */
-	mate->mate = hwif;
-	mate->channel = 1;
-
-	/*
-	 * Setting default configurations for drives
-	 */
-	t = (HT_CONFIG_DEFAULT << 8);
-	t |= HT_TIMING_DEFAULT;
-	hwif->drives[0].drive_data = t;
-	hwif->drives[1].drive_data = t;
 
-	t |= (HT_SECONDARY_IF << 8);
-	mate->drives[0].drive_data = t;
-	mate->drives[1].drive_data = t;
+	hwif->port_init_devs = ht6560b_port_init_devs;
+	mate->port_init_devs = ht6560b_port_init_devs;
 
-	ide_device_add(idx);
+	ide_device_add(idx, &ht6560b_port_info);
 
 	return 0;
 
diff --git a/drivers/ide/legacy/ide-cs.c b/drivers/ide/legacy/ide-cs.c
index 3bd2967..15ccf69 100644
--- a/drivers/ide/legacy/ide-cs.c
+++ b/drivers/ide/legacy/ide-cs.c
@@ -145,13 +145,36 @@ static void ide_detach(struct pcmcia_device *link)
 
 static int idecs_register(unsigned long io, unsigned long ctl, unsigned long irq, struct pcmcia_device *handle)
 {
+    ide_hwif_t *hwif;
     hw_regs_t hw;
+    int i;
+    u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+
     memset(&hw, 0, sizeof(hw));
-    ide_init_hwif_ports(&hw, io, ctl, NULL);
+    ide_std_init_ports(&hw, io, ctl);
     hw.irq = irq;
     hw.chipset = ide_pci;
     hw.dev = &handle->dev;
-    return ide_register_hw(&hw, &ide_undecoded_slave, NULL);
+
+    hwif = ide_deprecated_find_port(hw.io_ports[IDE_DATA_OFFSET]);
+    if (hwif == NULL)
+	return -1;
+
+    i = hwif->index;
+
+    if (hwif->present)
+	ide_unregister(i, 0, 0);
+    else if (!hwif->hold)
+	ide_init_port_data(hwif, i);
+
+    ide_init_port_hw(hwif, &hw);
+    hwif->quirkproc = &ide_undecoded_slave;
+
+    idx[0] = i;
+
+    ide_device_add(idx, NULL);
+
+    return hwif->present ? i : -1;
 }
 
 /*======================================================================
@@ -337,7 +360,7 @@ void ide_release(struct pcmcia_device *link)
     if (info->ndev) {
 	/* FIXME: if this fails we need to queue the cleanup somehow
 	   -- need to investigate the required PCMCIA magic */
-	ide_unregister(info->hd);
+	ide_unregister(info->hd, 0, 0);
     }
     info->ndev = 0;
 
diff --git a/drivers/ide/legacy/ide_platform.c b/drivers/ide/legacy/ide_platform.c
index 7c3231a..26c82ce 100644
--- a/drivers/ide/legacy/ide_platform.c
+++ b/drivers/ide/legacy/ide_platform.c
@@ -108,7 +108,7 @@ static int __devinit plat_ide_probe(struct platform_device *pdev)
 
 	idx[0] = hwif->index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, NULL);
 
 	platform_set_drvdata(pdev, hwif);
 
@@ -122,7 +122,7 @@ static int __devexit plat_ide_remove(struct platform_device *pdev)
 {
 	ide_hwif_t *hwif = pdev->dev.driver_data;
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif->index, 0, 0);
 
 	return 0;
 }
diff --git a/drivers/ide/legacy/macide.c b/drivers/ide/legacy/macide.c
index c54d07f..06df8df 100644
--- a/drivers/ide/legacy/macide.c
+++ b/drivers/ide/legacy/macide.c
@@ -123,19 +123,9 @@ static int __init macide_init(void)
 		ide_init_port_data(hwif, index);
 		ide_init_port_hw(hwif, &hw);
 
-		if (macintosh_config->ide_type == MAC_IDE_BABOON &&
-		    macintosh_config->ident == MAC_MODEL_PB190) {
-			/* Fix breakage in ide-disk.c: drive capacity	*/
-			/* is not initialized for drives without a 	*/
-			/* hardware ID, and we can't get that without	*/
-			/* probing the drive which freezes a 190.	*/
-			ide_drive_t *drive = &hwif->drives[0];
-			drive->capacity64 = drive->cyl*drive->head*drive->sect;
-		}
-
 		hwif->mmio = 1;
 
-		ide_device_add(idx);
+		ide_device_add(idx, NULL);
 	}
 
 	return 0;
diff --git a/drivers/ide/legacy/q40ide.c b/drivers/ide/legacy/q40ide.c
index a9c6b06..2f0b34d 100644
--- a/drivers/ide/legacy/q40ide.c
+++ b/drivers/ide/legacy/q40ide.c
@@ -154,7 +154,7 @@ static int __init q40ide_init(void)
 	}
     }
 
-    ide_device_add(idx);
+    ide_device_add(idx, NULL);
 
     return 0;
 }
diff --git a/drivers/ide/legacy/qd65xx.c b/drivers/ide/legacy/qd65xx.c
index 37534bb..bba29df 100644
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -305,18 +305,33 @@ static int __init qd_testreg(int port)
  * called to setup an ata channel : adjusts attributes & links for tuning
  */
 
-static void __init qd_setup(ide_hwif_t *hwif, int base, int config,
-			    unsigned int data0, unsigned int data1)
+static void __init qd_setup(ide_hwif_t *hwif, int base, int config)
 {
-	hwif->chipset = ide_qd65xx;
-	hwif->channel = hwif->index;
 	hwif->select_data = base;
 	hwif->config_data = config;
-	hwif->drives[0].drive_data = data0;
-	hwif->drives[1].drive_data = data1;
-	hwif->drives[0].io_32bit =
-	hwif->drives[1].io_32bit = 1;
-	hwif->pio_mask = ATA_PIO4;
+}
+
+static void __init qd6500_port_init_devs(ide_hwif_t *hwif)
+{
+	u8 base = hwif->select_data, config = QD_CONFIG(hwif);
+
+	hwif->drives[0].drive_data = QD6500_DEF_DATA;
+	hwif->drives[1].drive_data = QD6500_DEF_DATA;
+}
+
+static void __init qd6580_port_init_devs(ide_hwif_t *hwif)
+{
+	u16 t1, t2;
+	u8 base = hwif->select_data, config = QD_CONFIG(hwif);
+
+	if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
+		t1 = QD6580_DEF_DATA;
+		t2 = QD6580_DEF_DATA2;
+	} else
+		t2 = t1 = hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA;
+
+	hwif->drives[0].drive_data = t1;
+	hwif->drives[1].drive_data = t2;
 }
 
 /*
@@ -356,6 +371,14 @@ static void __exit qd_unsetup(ide_hwif_t *hwif)
 }
 */
 
+static const struct ide_port_info qd65xx_port_info __initdata = {
+	.chipset		= ide_qd65xx,
+	.host_flags		= IDE_HFLAG_IO_32BIT |
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_NO_AUTOTUNE,
+	.pio_mask		= ATA_PIO4,
+};
+
 /*
  * qd_probe:
  *
@@ -393,13 +416,14 @@ static int __init qd_probe(int base)
 			return 1;
 		}
 
-		qd_setup(hwif, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA);
+		qd_setup(hwif, base, config);
 
+		hwif->port_init_devs = qd6500_port_init_devs;
 		hwif->set_pio_mode = &qd6500_set_pio_mode;
 
-		idx[0] = unit;
+		idx[unit] = unit;
 
-		ide_device_add(idx);
+		ide_device_add(idx, &qd65xx_port_info);
 
 		return 1;
 	}
@@ -426,14 +450,15 @@ static int __init qd_probe(int base)
 			hwif = &ide_hwifs[unit];
 			printk(KERN_INFO "%s: qd6580: single IDE board\n",
 					 hwif->name);
-			qd_setup(hwif, base, config | (control << 8),
-				 QD6580_DEF_DATA, QD6580_DEF_DATA2);
 
+			qd_setup(hwif, base, config | (control << 8));
+
+			hwif->port_init_devs = qd6580_port_init_devs;
 			hwif->set_pio_mode = &qd6580_set_pio_mode;
 
-			idx[0] = unit;
+			idx[unit] = unit;
 
-			ide_device_add(idx);
+			ide_device_add(idx, &qd65xx_port_info);
 
 			outb(QD_DEF_CONTR, QD_CONTROL_PORT);
 
@@ -447,20 +472,20 @@ static int __init qd_probe(int base)
 			printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n",
 					hwif->name, mate->name);
 
-			qd_setup(hwif, base, config | (control << 8),
-				 QD6580_DEF_DATA, QD6580_DEF_DATA);
+			qd_setup(hwif, base, config | (control << 8));
 
+			hwif->port_init_devs = qd6580_port_init_devs;
 			hwif->set_pio_mode = &qd6580_set_pio_mode;
 
-			qd_setup(mate, base, config | (control << 8),
-				 QD6580_DEF_DATA2, QD6580_DEF_DATA2);
+			qd_setup(mate, base, config | (control << 8));
 
+			mate->port_init_devs = qd6580_port_init_devs;
 			mate->set_pio_mode = &qd6580_set_pio_mode;
 
 			idx[0] = 0;
 			idx[1] = 1;
 
-			ide_device_add(idx);
+			ide_device_add(idx, &qd65xx_port_info);
 
 			outb(QD_DEF_CONTR, QD_CONTROL_PORT);
 
diff --git a/drivers/ide/legacy/umc8672.c b/drivers/ide/legacy/umc8672.c
index 26f38ce..5696ba0 100644
--- a/drivers/ide/legacy/umc8672.c
+++ b/drivers/ide/legacy/umc8672.c
@@ -120,9 +120,14 @@ static void umc_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	spin_unlock_irqrestore(&ide_lock, flags);
 }
 
+static const struct ide_port_info umc8672_port_info __initdata = {
+	.chipset		= ide_umc8672,
+	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
+	.pio_mask		= ATA_PIO4,
+};
+
 static int __init umc8672_probe(void)
 {
-	ide_hwif_t *hwif, *mate;
 	unsigned long flags;
 	static u8 idx[4] = { 0, 1, 0xff, 0xff };
 
@@ -143,21 +148,10 @@ static int __init umc8672_probe(void)
 	umc_set_speeds (current_speeds);
 	local_irq_restore(flags);
 
-	hwif = &ide_hwifs[0];
-	mate = &ide_hwifs[1];
-
-	hwif->chipset = ide_umc8672;
-	hwif->pio_mask = ATA_PIO4;
-	hwif->set_pio_mode = &umc_set_pio_mode;
-	hwif->mate = mate;
-
-	mate->chipset = ide_umc8672;
-	mate->pio_mask = ATA_PIO4;
-	mate->set_pio_mode = &umc_set_pio_mode;
-	mate->mate = hwif;
-	mate->channel = 1;
+	ide_hwifs[0].set_pio_mode = &umc_set_pio_mode;
+	ide_hwifs[1].set_pio_mode = &umc_set_pio_mode;
 
-	ide_device_add(idx);
+	ide_device_add(idx, &umc8672_port_info);
 
 	return 0;
 }
diff --git a/drivers/ide/mips/au1xxx-ide.c b/drivers/ide/mips/au1xxx-ide.c
index cd42b30..0f4bf5d 100644
--- a/drivers/ide/mips/au1xxx-ide.c
+++ b/drivers/ide/mips/au1xxx-ide.c
@@ -548,6 +548,17 @@ static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
 	*ata_regs = ahwif->regbase + (14 << AU1XXX_ATA_REG_OFFSET);
 }
 
+static const struct ide_port_info au1xxx_port_info = {
+	.host_flags		= IDE_HFLAG_POST_SET_MODE |
+				  IDE_HFLAG_NO_DMA | /* no SFF-style DMA */
+				  IDE_HFLAG_NO_IO_32BIT |
+				  IDE_HFLAG_UNMASK_IRQS,
+	.pio_mask		= ATA_PIO4,
+#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
+	.mwdma_mask		= ATA_MWDMA2,
+#endif
+};
+
 static int au_ide_probe(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
@@ -606,21 +617,6 @@ static int au_ide_probe(struct device *dev)
 
 	hwif->dev = dev;
 
-	hwif->ultra_mask                = 0x0;  /* Disable Ultra DMA */
-#ifdef CONFIG_BLK_DEV_IDE_AU1XXX_MDMA2_DBDMA
-	hwif->mwdma_mask                = 0x07; /* Multimode-2 DMA  */
-	hwif->swdma_mask                = 0x00;
-#else
-	hwif->mwdma_mask                = 0x0;
-	hwif->swdma_mask                = 0x0;
-#endif
-
-	hwif->pio_mask = ATA_PIO4;
-	hwif->host_flags = IDE_HFLAG_POST_SET_MODE;
-
-	hwif->drives[0].unmask          = 1;
-	hwif->drives[1].unmask          = 1;
-
 	/* hold should be on in all cases */
 	hwif->hold                      = 1;
 
@@ -651,16 +647,9 @@ static int au_ide_probe(struct device *dev)
 	hwif->ide_dma_test_irq          = &auide_dma_test_irq;
 	hwif->dma_lost_irq		= &auide_dma_lost_irq;
 #endif
-	hwif->channel                   = 0;
 	hwif->select_data               = 0;    /* no chipset-specific code */
 	hwif->config_data               = 0;    /* no chipset-specific code */
 
-	hwif->drives[0].autotune        = 1;    /* 1=autotune, 2=noautotune, 0=default */
-	hwif->drives[1].autotune	= 1;
-
-	hwif->drives[0].no_io_32bit	= 1;
-	hwif->drives[1].no_io_32bit	= 1;
-
 	auide_hwif.hwif                 = hwif;
 	hwif->hwif_data                 = &auide_hwif;
 
@@ -671,7 +660,7 @@ static int au_ide_probe(struct device *dev)
 
 	idx[0] = hwif->index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, &au1xxx_port_info);
 
 	dev_set_drvdata(dev, hwif);
 
@@ -688,7 +677,7 @@ static int au_ide_remove(struct device *dev)
 	ide_hwif_t *hwif = dev_get_drvdata(dev);
 	_auide_hwif *ahwif = &auide_hwif;
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif->index, 0, 0);
 
 	iounmap((void *)ahwif->regbase);
 
diff --git a/drivers/ide/mips/swarm.c b/drivers/ide/mips/swarm.c
index 8b3959d..956259f 100644
--- a/drivers/ide/mips/swarm.c
+++ b/drivers/ide/mips/swarm.c
@@ -129,7 +129,7 @@ static int __devinit swarm_ide_probe(struct device *dev)
 
 	idx[0] = hwif->index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, NULL);
 
 	dev_set_drvdata(dev, hwif);
 
diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index 824df78..cfb3265 100644
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -7,7 +7,6 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
@@ -166,6 +165,16 @@ static unsigned int __devinit init_chipset_aec62xx(struct pci_dev *dev, const ch
 	return dev->irq;
 }
 
+static u8 __devinit atp86x_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 ata66 = 0, mask = hwif->channel ? 0x02 : 0x01;
+
+	pci_read_config_byte(dev, 0x49, &ata66);
+
+	return (ata66 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
 static void __devinit init_hwif_aec62xx(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
@@ -174,21 +183,10 @@ static void __devinit init_hwif_aec62xx(ide_hwif_t *hwif)
 
 	if (dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF)
 		hwif->set_dma_mode = &aec6210_set_mode;
-	else
+	else {
 		hwif->set_dma_mode = &aec6260_set_mode;
 
-	if (hwif->dma_base == 0)
-		return;
-
-	if (dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF)
-		return;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
-		u8 ata66 = 0, mask = hwif->channel ? 0x02 : 0x01;
-
-		pci_read_config_byte(dev, 0x49, &ata66);
-
-		hwif->cbl = (ata66 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+		hwif->cable_detect = atp86x_cable_detect;
 	}
 }
 
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 130cc6e..b3b6f51 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -31,7 +31,6 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
@@ -666,13 +665,12 @@ static void __devinit init_hwif_common_ali15x3 (ide_hwif_t *hwif)
 	hwif->set_dma_mode = &ali_set_dma_mode;
 	hwif->udma_filter = &ali_udma_filter;
 
+	hwif->cable_detect = ata66_ali15x3;
+
 	if (hwif->dma_base == 0)
 		return;
 
 	hwif->dma_setup = &ali15x3_dma_setup;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = ata66_ali15x3(hwif);
 }
 
 /**
diff --git a/drivers/ide/pci/amd74xx.c b/drivers/ide/pci/amd74xx.c
index 8c52bc9..2ef890c 100644
--- a/drivers/ide/pci/amd74xx.c
+++ b/drivers/ide/pci/amd74xx.c
@@ -17,12 +17,9 @@
 
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
-#include <asm/io.h>
 
 #include "ide-timing.h"
 
@@ -199,6 +196,14 @@ static unsigned int __devinit init_chipset_amd74xx(struct pci_dev *dev,
 	return dev->irq;
 }
 
+static u8 __devinit amd_cable_detect(ide_hwif_t *hwif)
+{
+	if ((amd_80w >> hwif->channel) & 1)
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
 static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
@@ -209,15 +214,7 @@ static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif)
 	hwif->set_pio_mode = &amd_set_pio_mode;
 	hwif->set_dma_mode = &amd_set_drive;
 
-	if (!hwif->dma_base)
-		return;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
-		if ((amd_80w >> hwif->channel) & 1)
-			hwif->cbl = ATA_CBL_PATA80;
-		else
-			hwif->cbl = ATA_CBL_PATA40;
-	}
+	hwif->cable_detect = amd_cable_detect;
 }
 
 #define IDE_HFLAGS_AMD \
diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c
index b56274a..7e037c8 100644
--- a/drivers/ide/pci/atiixp.c
+++ b/drivers/ide/pci/atiixp.c
@@ -6,15 +6,11 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/ioport.h>
 #include <linux/pci.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
-#include <linux/delay.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 #define ATIIXP_IDE_PIO_TIMING		0x40
 #define ATIIXP_IDE_MDMA_TIMING		0x44
 #define ATIIXP_IDE_PIO_CONTROL		0x48
@@ -121,6 +117,19 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
 	spin_unlock_irqrestore(&atiixp_lock, flags);
 }
 
+static u8 __devinit atiixp_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *pdev = to_pci_dev(hwif->dev);
+	u8 udma_mode = 0, ch = hwif->channel;
+
+	pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
+
+	if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
+		return ATA_CBL_PATA80;
+	else
+		return ATA_CBL_PATA40;
+}
+
 /**
  *	init_hwif_atiixp		-	fill in the hwif for the ATIIXP
  *	@hwif: IDE interface
@@ -131,21 +140,10 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed)
 
 static void __devinit init_hwif_atiixp(ide_hwif_t *hwif)
 {
-	struct pci_dev *pdev = to_pci_dev(hwif->dev);
-	u8 udma_mode = 0, ch = hwif->channel;
-
 	hwif->set_pio_mode = &atiixp_set_pio_mode;
 	hwif->set_dma_mode = &atiixp_set_dma_mode;
 
-	if (!hwif->dma_base)
-		return;
-
-	pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode);
-
-	if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40)
-		hwif->cbl = ATA_CBL_PATA80;
-	else
-		hwif->cbl = ATA_CBL_PATA40;
+	hwif->cable_detect = atiixp_cable_detect;
 }
 
 static const struct ide_port_info atiixp_pci_info[] __devinitdata = {
diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index 7240c20..bd24dad 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -103,10 +103,6 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
@@ -703,6 +699,18 @@ static int pci_conf2(void)
 	return 0;
 }
 
+static const struct ide_port_info cmd640_port_info __initdata = {
+	.chipset		= ide_cmd640,
+	.host_flags		= IDE_HFLAG_SERIALIZE |
+				  IDE_HFLAG_NO_DMA |
+				  IDE_HFLAG_NO_AUTOTUNE |
+				  IDE_HFLAG_ABUSE_PREFETCH |
+				  IDE_HFLAG_ABUSE_FAST_DEVSEL,
+#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
+	.pio_mask		= ATA_PIO5,
+#endif
+};
+
 /*
  * Probe for a cmd640 chipset, and initialize it if found.
  */
@@ -760,11 +768,7 @@ static int __init cmd640x_init(void)
 	setup_device_ptrs ();
 	printk("%s: buggy cmd640%c interface on %s, config=0x%02x\n",
 	       cmd_hwif0->name, 'a' + cmd640_chip_version - 1, bus_type, cfr);
-	cmd_hwif0->chipset = ide_cmd640;
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-	cmd_hwif0->host_flags = IDE_HFLAG_ABUSE_PREFETCH |
-				IDE_HFLAG_ABUSE_FAST_DEVSEL;
-	cmd_hwif0->pio_mask = ATA_PIO5;
 	cmd_hwif0->set_pio_mode = &cmd640_set_pio_mode;
 #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
 
@@ -815,23 +819,14 @@ static int __init cmd640x_init(void)
 	 * Initialize data for secondary cmd640 port, if enabled
 	 */
 	if (second_port_cmd640) {
-		cmd_hwif0->serialized = 1;
-		cmd_hwif1->serialized = 1;
-		cmd_hwif1->chipset = ide_cmd640;
-		cmd_hwif0->mate = cmd_hwif1;
-		cmd_hwif1->mate = cmd_hwif0;
-		cmd_hwif1->channel = 1;
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-		cmd_hwif1->host_flags = IDE_HFLAG_ABUSE_PREFETCH |
-					IDE_HFLAG_ABUSE_FAST_DEVSEL;
-		cmd_hwif1->pio_mask = ATA_PIO5;
 		cmd_hwif1->set_pio_mode = &cmd640_set_pio_mode;
 #endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
 
 		idx[1] = cmd_hwif1->index;
 	}
 	printk(KERN_INFO "%s: %sserialized, secondary interface %s\n", cmd_hwif1->name,
-		cmd_hwif0->serialized ? "" : "not ", port2);
+			 second_port_cmd640 ? "" : "not ", port2);
 
 	/*
 	 * Establish initial timings/prefetch for all drives.
@@ -876,7 +871,7 @@ static int __init cmd640x_init(void)
 	cmd640_dump_regs();
 #endif
 
-	ide_device_add(idx);
+	ide_device_add(idx, &cmd640_port_info);
 
 	return 1;
 }
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index 04aa9e5..edabe62 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -13,7 +13,6 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
@@ -393,6 +392,8 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
 	hwif->set_pio_mode = &cmd64x_set_pio_mode;
 	hwif->set_dma_mode = &cmd64x_set_dma_mode;
 
+	hwif->cable_detect = ata66_cmd64x;
+
 	if (!hwif->dma_base)
 		return;
 
@@ -411,9 +412,6 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
 	if (dev->device == PCI_DEVICE_ID_CMD_646 && dev->revision < 5)
 		hwif->ultra_mask = 0x00;
 
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = ata66_cmd64x(hwif);
-
 	switch (dev->device) {
 	case PCI_DEVICE_ID_CMD_648:
 	case PCI_DEVICE_ID_CMD_649:
diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c
index eb68a9a..0be1a82 100644
--- a/drivers/ide/pci/cs5520.c
+++ b/drivers/ide/pci/cs5520.c
@@ -35,22 +35,12 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
-
-#include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 #include <linux/dma-mapping.h>
 
-#include <asm/io.h>
-#include <asm/irq.h>
-
 struct pio_clocks
 {
 	int address;
@@ -180,7 +170,7 @@ static int __devinit cs5520_init_one(struct pci_dev *dev, const struct pci_devic
 
 	ide_pci_setup_ports(dev, d, 14, &idx[0]);
 
-	ide_device_add(idx);
+	ide_device_add(idx, d);
 
 	return 0;
 }
diff --git a/drivers/ide/pci/cs5530.c b/drivers/ide/pci/cs5530.c
index 765aac3..941a134 100644
--- a/drivers/ide/pci/cs5530.c
+++ b/drivers/ide/pci/cs5530.c
@@ -15,18 +15,12 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
-#include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
+
 #include <asm/io.h>
-#include <asm/irq.h>
 
 /*
  * Here are the standard PIO mode 0-4 timings for each "format".
diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
index 66433aa..d7b5ea9 100644
--- a/drivers/ide/pci/cs5535.c
+++ b/drivers/ide/pci/cs5535.c
@@ -155,8 +155,9 @@ static void cs5535_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	cs5535_set_speed(drive, XFER_PIO_0 + pio);
 }
 
-static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)
+static u8 __devinit cs5535_cable_detect(ide_hwif_t *hwif)
 {
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
 	u8 bit;
 
 	/* if a 80 wire cable was detected */
@@ -175,15 +176,10 @@ static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)
  */
 static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
 {
-	struct pci_dev *dev = to_pci_dev(hwif->dev);
-
 	hwif->set_pio_mode = &cs5535_set_pio_mode;
 	hwif->set_dma_mode = &cs5535_set_dma_mode;
 
-	if (hwif->dma_base == 0)
-		return;
-
-	hwif->cbl = cs5535_cable_detect(dev);
+	hwif->cable_detect = cs5535_cable_detect;
 }
 
 static const struct ide_port_info cs5535_chipset __devinitdata = {
diff --git a/drivers/ide/pci/cy82c693.c b/drivers/ide/pci/cy82c693.c
index 50100ac..724cbac 100644
--- a/drivers/ide/pci/cy82c693.c
+++ b/drivers/ide/pci/cy82c693.c
@@ -45,7 +45,6 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 
diff --git a/drivers/ide/pci/delkin_cb.c b/drivers/ide/pci/delkin_cb.c
index 27e47fc..3f9cd64 100644
--- a/drivers/ide/pci/delkin_cb.c
+++ b/drivers/ide/pci/delkin_cb.c
@@ -16,15 +16,14 @@
  *  License.  See the file COPYING in the main directory of this archive for
  *  more details.
  */
-#include <linux/autoconf.h>
+
 #include <linux/types.h>
 #include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+
 #include <asm/io.h>
 
 /*
@@ -52,6 +51,7 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
 	ide_hwif_t *hwif = NULL;
 	ide_drive_t *drive;
 	int i, rc;
+	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 
 	rc = pci_enable_device(dev);
 	if (rc) {
@@ -78,12 +78,27 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
 	hw.irq = dev->irq;
 	hw.chipset = ide_pci;		/* this enables IRQ sharing */
 
-	rc = ide_register_hw(&hw, &ide_undecoded_slave, &hwif);
-	if (rc < 0) {
-		printk(KERN_ERR "delkin_cb: ide_register_hw failed (%d)\n", rc);
-		pci_disable_device(dev);
-		return -ENODEV;
-	}
+	hwif = ide_deprecated_find_port(hw.io_ports[IDE_DATA_OFFSET]);
+	if (hwif == NULL)
+		goto out_disable;
+
+	i = hwif->index;
+
+	if (hwif->present)
+		ide_unregister(i, 0, 0);
+	else if (!hwif->hold)
+		ide_init_port_data(hwif, i);
+
+	ide_init_port_hw(hwif, &hw);
+	hwif->quirkproc = &ide_undecoded_slave;
+
+	idx[0] = i;
+
+	ide_device_add(idx, NULL);
+
+	if (!hwif->present)
+		goto out_disable;
+
 	pci_set_drvdata(dev, hwif);
 	hwif->dev = &dev->dev;
 	drive = &hwif->drives[0];
@@ -92,6 +107,11 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
 		drive->unmask   = 1;
 	}
 	return 0;
+
+out_disable:
+	printk(KERN_ERR "delkin_cb: no IDE devices found\n");
+	pci_disable_device(dev);
+	return -ENODEV;
 }
 
 static void
@@ -100,7 +120,8 @@ delkin_cb_remove (struct pci_dev *dev)
 	ide_hwif_t *hwif = pci_get_drvdata(dev);
 
 	if (hwif)
-		ide_unregister(hwif->index);
+		ide_unregister(hwif->index, 0, 0);
+
 	pci_disable_device(dev);
 }
 
diff --git a/drivers/ide/pci/generic.c b/drivers/ide/pci/generic.c
index 59ebe84..9262a91 100644
--- a/drivers/ide/pci/generic.c
+++ b/drivers/ide/pci/generic.c
@@ -22,18 +22,11 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 static int ide_generic_all;		/* Set to claim all devices */
 
 /*
diff --git a/drivers/ide/pci/hpt34x.c b/drivers/ide/pci/hpt34x.c
index 25dbb81..9f01da4 100644
--- a/drivers/ide/pci/hpt34x.c
+++ b/drivers/ide/pci/hpt34x.c
@@ -26,20 +26,13 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
 #include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 
-#include <asm/io.h>
-#include <asm/irq.h>
-
 #define HPT343_DEBUG_DRIVE_INFO		0
 
 static void hpt34x_set_mode(ide_drive_t *drive, const u8 speed)
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index 5623cad..d0f7bb8 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -121,12 +121,8 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
 #include <linux/blkdev.h>
 #include <linux/hdreg.h>
-
 #include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
@@ -134,7 +130,6 @@
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
-#include <asm/irq.h>
 
 /* various tuning parameters */
 #define HPT_RESET_STATE_ENGINE
@@ -1279,12 +1274,55 @@ static unsigned int __devinit init_chipset_hpt366(struct pci_dev *dev, const cha
 	return dev->irq;
 }
 
+static u8 __devinit hpt3xx_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev	*dev	= to_pci_dev(hwif->dev);
+	struct hpt_info *info	= pci_get_drvdata(dev);
+	u8 chip_type		= info->chip_type;
+	u8 scr1 = 0, ata66	= hwif->channel ? 0x01 : 0x02;
+
+	/*
+	 * The HPT37x uses the CBLID pins as outputs for MA15/MA16
+	 * address lines to access an external EEPROM.  To read valid
+	 * cable detect state the pins must be enabled as inputs.
+	 */
+	if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
+		/*
+		 * HPT374 PCI function 1
+		 * - set bit 15 of reg 0x52 to enable TCBLID as input
+		 * - set bit 15 of reg 0x56 to enable FCBLID as input
+		 */
+		u8  mcr_addr = hwif->select_data + 2;
+		u16 mcr;
+
+		pci_read_config_word(dev, mcr_addr, &mcr);
+		pci_write_config_word(dev, mcr_addr, (mcr | 0x8000));
+		/* now read cable id register */
+		pci_read_config_byte(dev, 0x5a, &scr1);
+		pci_write_config_word(dev, mcr_addr, mcr);
+	} else if (chip_type >= HPT370) {
+		/*
+		 * HPT370/372 and 374 pcifn 0
+		 * - clear bit 0 of reg 0x5b to enable P/SCBLID as inputs
+		 */
+		u8 scr2 = 0;
+
+		pci_read_config_byte(dev, 0x5b, &scr2);
+		pci_write_config_byte(dev, 0x5b, (scr2 & ~1));
+		/* now read cable id register */
+		pci_read_config_byte(dev, 0x5a, &scr1);
+		pci_write_config_byte(dev, 0x5b,  scr2);
+	} else
+		pci_read_config_byte(dev, 0x5a, &scr1);
+
+	return (scr1 & ata66) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
 static void __devinit init_hwif_hpt366(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	struct hpt_info *info	= pci_get_drvdata(dev);
 	int serialize		= HPT_SERIALIZE_IO;
-	u8  scr1 = 0, ata66	= hwif->channel ? 0x01 : 0x02;
 	u8  chip_type		= info->chip_type;
 	u8  new_mcr, old_mcr	= 0;
 
@@ -1301,6 +1339,8 @@ static void __devinit init_hwif_hpt366(ide_hwif_t *hwif)
 	hwif->udma_filter	= &hpt3xx_udma_filter;
 	hwif->mdma_filter	= &hpt3xx_mdma_filter;
 
+	hwif->cable_detect	= hpt3xx_cable_detect;
+
 	/*
 	 * HPT3xxN chips have some complications:
 	 *
@@ -1346,43 +1386,6 @@ static void __devinit init_hwif_hpt366(ide_hwif_t *hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	/*
-	 * The HPT37x uses the CBLID pins as outputs for MA15/MA16
-	 * address lines to access an external EEPROM.  To read valid
-	 * cable detect state the pins must be enabled as inputs.
-	 */
-	if (chip_type == HPT374 && (PCI_FUNC(dev->devfn) & 1)) {
-		/*
-		 * HPT374 PCI function 1
-		 * - set bit 15 of reg 0x52 to enable TCBLID as input
-		 * - set bit 15 of reg 0x56 to enable FCBLID as input
-		 */
-		u8  mcr_addr = hwif->select_data + 2;
-		u16 mcr;
-
-		pci_read_config_word (dev, mcr_addr, &mcr);
-		pci_write_config_word(dev, mcr_addr, (mcr | 0x8000));
-		/* now read cable id register */
-		pci_read_config_byte (dev, 0x5a, &scr1);
-		pci_write_config_word(dev, mcr_addr, mcr);
-	} else if (chip_type >= HPT370) {
-		/*
-		 * HPT370/372 and 374 pcifn 0
-		 * - clear bit 0 of reg 0x5b to enable P/SCBLID as inputs
-		 */
-		u8 scr2 = 0;
-
-		pci_read_config_byte (dev, 0x5b, &scr2);
-		pci_write_config_byte(dev, 0x5b, (scr2 & ~1));
-		/* now read cable id register */
-		pci_read_config_byte (dev, 0x5a, &scr1);
-		pci_write_config_byte(dev, 0x5b,  scr2);
-	} else
-		pci_read_config_byte (dev, 0x5a, &scr1);
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = (scr1 & ata66) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
-
 	if (chip_type >= HPT374) {
 		hwif->ide_dma_test_irq	= &hpt374_ide_dma_test_irq;
 		hwif->ide_dma_end	= &hpt374_ide_dma_end;
diff --git a/drivers/ide/pci/it8213.c b/drivers/ide/pci/it8213.c
index df74e58..e3427ea 100644
--- a/drivers/ide/pci/it8213.c
+++ b/drivers/ide/pci/it8213.c
@@ -10,13 +10,10 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 /**
  *	it8213_set_pio_mode	-	set host controller for PIO mode
  *	@drive: drive
@@ -143,6 +140,16 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
 	}
 }
 
+static u8 __devinit it8213_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	u8 reg42h = 0;
+
+	pci_read_config_byte(dev, 0x42, &reg42h);
+
+	return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
 /**
  *	init_hwif_it8213	-	set up hwif structs
  *	@hwif: interface to set up
@@ -152,19 +159,10 @@ static void it8213_set_dma_mode(ide_drive_t *drive, const u8 speed)
 
 static void __devinit init_hwif_it8213(ide_hwif_t *hwif)
 {
-	struct pci_dev *dev = to_pci_dev(hwif->dev);
-	u8 reg42h = 0;
-
 	hwif->set_dma_mode = &it8213_set_dma_mode;
 	hwif->set_pio_mode = &it8213_set_pio_mode;
 
-	if (!hwif->dma_base)
-		return;
-
-	pci_read_config_byte(dev, 0x42, &reg42h);
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+	hwif->cable_detect = it8213_cable_detect;
 }
 
 
diff --git a/drivers/ide/pci/it821x.c b/drivers/ide/pci/it821x.c
index 938d35f..1597f0c 100644
--- a/drivers/ide/pci/it821x.c
+++ b/drivers/ide/pci/it821x.c
@@ -63,13 +63,10 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 struct it821x_dev
 {
 	unsigned int smart:1,		/* Are we in smart raid mode */
@@ -579,14 +576,13 @@ static void __devinit init_hwif_it821x(ide_hwif_t *hwif)
 	} else
 		hwif->host_flags |= IDE_HFLAG_NO_SET_MODE;
 
+	hwif->cable_detect = ata66_it821x;
+
 	if (hwif->dma_base == 0)
 		return;
 
 	hwif->ultra_mask = ATA_UDMA6;
 	hwif->mwdma_mask = ATA_MWDMA2;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = ata66_it821x(hwif);
 }
 
 static void __devinit it8212_disable_raid(struct pci_dev *dev)
diff --git a/drivers/ide/pci/jmicron.c b/drivers/ide/pci/jmicron.c
index 8b40f64..a56bcb4 100644
--- a/drivers/ide/pci/jmicron.c
+++ b/drivers/ide/pci/jmicron.c
@@ -8,13 +8,10 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 typedef enum {
 	PORT_PATA0 = 0,
 	PORT_PATA1 = 1,
@@ -111,11 +108,7 @@ static void __devinit init_hwif_jmicron(ide_hwif_t *hwif)
 	hwif->set_pio_mode = &jmicron_set_pio_mode;
 	hwif->set_dma_mode = &jmicron_set_dma_mode;
 
-	if (hwif->dma_base == 0)
-		return;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = ata66_jmicron(hwif);
+	hwif->cable_detect = ata66_jmicron;
 }
 
 static const struct ide_port_info jmicron_chipset __devinitdata = {
diff --git a/drivers/ide/pci/ns87415.c b/drivers/ide/pci/ns87415.c
index fc9eee9..bf0d3b2 100644
--- a/drivers/ide/pci/ns87415.c
+++ b/drivers/ide/pci/ns87415.c
@@ -10,11 +10,7 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
 #include <linux/interrupt.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 0ce92d3..46e8748 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -87,11 +87,6 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/pci.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
@@ -320,14 +315,18 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	spin_unlock_irqrestore(&opti621_lock, flags);
 }
 
+static void __devinit opti621_port_init_devs(ide_hwif_t *hwif)
+{
+	hwif->drives[0].drive_data = PIO_DONT_KNOW;
+	hwif->drives[1].drive_data = PIO_DONT_KNOW;
+}
+
 /*
  * init_hwif_opti621() is called once for each hwif found at boot.
  */
 static void __devinit init_hwif_opti621 (ide_hwif_t *hwif)
 {
-	hwif->drives[0].drive_data = PIO_DONT_KNOW;
-	hwif->drives[1].drive_data = PIO_DONT_KNOW;
-
+	hwif->port_init_devs = opti621_port_init_devs;
 	hwif->set_pio_mode = &opti621_set_pio_mode;
 }
 
diff --git a/drivers/ide/pci/pdc202xx_new.c b/drivers/ide/pci/pdc202xx_new.c
index bb29db0..1c8cb77 100644
--- a/drivers/ide/pci/pdc202xx_new.c
+++ b/drivers/ide/pci/pdc202xx_new.c
@@ -19,18 +19,12 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
-#include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 
 #include <asm/io.h>
-#include <asm/irq.h>
 
 #ifdef CONFIG_PPC_PMAC
 #include <asm/prom.h>
@@ -197,7 +191,7 @@ static void pdcnew_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	}
 }
 
-static u8 pdcnew_cable_detect(ide_hwif_t *hwif)
+static u8 __devinit pdcnew_cable_detect(ide_hwif_t *hwif)
 {
 	if (get_indexed_reg(hwif, 0x0b) & 0x04)
 		return ATA_CBL_PATA40;
@@ -456,11 +450,7 @@ static void __devinit init_hwif_pdc202new(ide_hwif_t *hwif)
 	hwif->quirkproc = &pdcnew_quirkproc;
 	hwif->resetproc = &pdcnew_reset;
 
-	if (hwif->dma_base == 0)
-		return;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = pdcnew_cable_detect(hwif);
+	hwif->cable_detect = pdcnew_cable_detect;
 }
 
 static struct pci_dev * __devinit pdc20270_get_dev2(struct pci_dev *dev)
diff --git a/drivers/ide/pci/pdc202xx_old.c b/drivers/ide/pci/pdc202xx_old.c
index 31a1308..da43297 100644
--- a/drivers/ide/pci/pdc202xx_old.c
+++ b/drivers/ide/pci/pdc202xx_old.c
@@ -32,18 +32,13 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
 #include <linux/blkdev.h>
 #include <linux/hdreg.h>
-#include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 
 #include <asm/io.h>
-#include <asm/irq.h>
 
 #define PDC202XX_DEBUG_DRIVE_INFO	0
 
@@ -140,10 +135,10 @@ static void pdc202xx_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	pdc202xx_set_mode(drive, XFER_PIO_0 + pio);
 }
 
-static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
+static u8 __devinit pdc2026x_old_cable_detect(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
-	u16 CIS = 0, mask = (hwif->channel) ? (1<<11) : (1<<10);
+	u16 CIS, mask = hwif->channel ? (1 << 11) : (1 << 10);
 
 	pci_read_config_word(dev, 0x50, &CIS);
 
@@ -311,9 +306,12 @@ static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
 
 	hwif->quirkproc = &pdc202xx_quirkproc;
 
-	if (dev->device != PCI_DEVICE_ID_PROMISE_20246)
+	if (dev->device != PCI_DEVICE_ID_PROMISE_20246) {
 		hwif->resetproc = &pdc202xx_reset;
 
+		hwif->cable_detect = pdc2026x_old_cable_detect;
+	}
+
 	if (hwif->dma_base == 0)
 		return;
 
@@ -321,9 +319,6 @@ static void __devinit init_hwif_pdc202xx(ide_hwif_t *hwif)
 	hwif->dma_timeout = &pdc202xx_dma_timeout;
 
 	if (dev->device != PCI_DEVICE_ID_PROMISE_20246) {
-		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-			hwif->cbl = pdc202xx_old_cable_detect(hwif);
-
 		hwif->dma_start = &pdc202xx_old_ide_dma_start;
 		hwif->ide_dma_end = &pdc202xx_old_ide_dma_end;
 	} 
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index c1a6b68..decef0f 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -47,11 +47,9 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/ioport.h>
 #include <linux/pci.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
-#include <linux/delay.h>
 #include <linux/init.h>
 
 #include <asm/io.h>
@@ -290,14 +288,11 @@ static void __devinit init_hwif_piix(ide_hwif_t *hwif)
 	hwif->set_pio_mode = &piix_set_pio_mode;
 	hwif->set_dma_mode = &piix_set_dma_mode;
 
+	hwif->cable_detect = piix_cable_detect;
+
 	if (!hwif->dma_base)
 		return;
 
-	if (hwif->ultra_mask & 0x78) {
-		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-			hwif->cbl = piix_cable_detect(hwif);
-	}
-
 	if (no_piix_dma)
 		hwif->ultra_mask = hwif->mwdma_mask = hwif->swdma_mask = 0;
 }
diff --git a/drivers/ide/pci/rz1000.c b/drivers/ide/pci/rz1000.c
index 7ed6625..5167661 100644
--- a/drivers/ide/pci/rz1000.c
+++ b/drivers/ide/pci/rz1000.c
@@ -16,18 +16,11 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
@@ -40,8 +33,7 @@ static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
 	} else {
 		if (hwif->mate)
 			hwif->mate->serialized = hwif->serialized = 1;
-		hwif->drives[0].no_unmask = 1;
-		hwif->drives[1].no_unmask = 1;
+		hwif->host_flags |= IDE_HFLAG_NO_UNMASK_IRQS;
 		printk(KERN_INFO "%s: serialized, disabled unmasking "
 			"(buggy RZ1000/RZ1001)\n", hwif->name);
 	}
diff --git a/drivers/ide/pci/sc1200.c b/drivers/ide/pci/sc1200.c
index af499a6..561aa47 100644
--- a/drivers/ide/pci/sc1200.c
+++ b/drivers/ide/pci/sc1200.c
@@ -14,19 +14,13 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
-#include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 #include <linux/pm.h>
+
 #include <asm/io.h>
-#include <asm/irq.h>
 
 #define SC1200_REV_A	0x00
 #define SC1200_REV_B1	0x01
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index 7694969..238e3e1 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -644,6 +644,11 @@ static void __devinit init_iops_scc(ide_hwif_t *hwif)
 	init_mmio_iops_scc(hwif);
 }
 
+static u8 __devinit scc_cable_detect(ide_hwif_t *hwif)
+{
+	return ATA_CBL_PATA80;
+}
+
 /**
  *	init_hwif_scc	-	set up hwif
  *	@hwif: interface to set up
@@ -678,8 +683,7 @@ static void __devinit init_hwif_scc(ide_hwif_t *hwif)
 	else
 		hwif->ultra_mask = ATA_UDMA5; /* 100MHz */
 
-	/* we support 80c cable only. */
-	hwif->cbl = ATA_CBL_PATA80;
+	hwif->cable_detect = scc_cable_detect;
 }
 
 #define DECLARE_SCC_DEV(name_str)			\
@@ -732,7 +736,7 @@ static void __devexit scc_remove(struct pci_dev *dev)
 		hwif->dmatable_cpu = NULL;
 	}
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif->index, 0, 0);
 
 	hwif->chipset = ide_unknown;
 	iounmap((void*)ports->dma);
diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index f495253..c11880b 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -31,12 +31,10 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/ioport.h>
 #include <linux/pci.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
-#include <linux/delay.h>
 
 #include <asm/io.h>
 
@@ -346,13 +344,8 @@ static void __devinit init_hwif_svwks (ide_hwif_t *hwif)
 	hwif->set_dma_mode = &svwks_set_dma_mode;
 	hwif->udma_filter = &svwks_udma_filter;
 
-	if (!hwif->dma_base)
-		return;
-
-	if (dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
-		if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-			hwif->cbl = ata66_svwks(hwif);
-	}
+	if (dev->device != PCI_DEVICE_ID_SERVERWORKS_OSB4IDE)
+		hwif->cable_detect = ata66_svwks;
 }
 
 #define IDE_HFLAGS_SVWKS \
diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index 8590207..0546264 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -25,8 +25,6 @@
 #include <linux/hdreg.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
 #include <linux/ioport.h>
 #include <linux/blkdev.h>
 #include <linux/scatterlist.h>
@@ -555,7 +553,6 @@ static void __devinit
 ide_init_sgiioc4(ide_hwif_t * hwif)
 {
 	hwif->mmio = 1;
-	hwif->pio_mask = 0x00;
 	hwif->set_pio_mode = NULL; /* Sets timing for PIO mode */
 	hwif->set_dma_mode = &sgiioc4_set_dma_mode;
 	hwif->selectproc = NULL;/* Use the default routine to select drive */
@@ -572,8 +569,6 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
 	if (hwif->dma_base == 0)
 		return;
 
-	hwif->mwdma_mask = ATA_MWDMA2_ONLY;
-
 	hwif->dma_host_set = &sgiioc4_dma_host_set;
 	hwif->dma_setup = &sgiioc4_ide_dma_setup;
 	hwif->dma_start = &sgiioc4_ide_dma_start;
@@ -583,6 +578,13 @@ ide_init_sgiioc4(ide_hwif_t * hwif)
 	hwif->dma_timeout = &ide_dma_timeout;
 }
 
+static const struct ide_port_info sgiioc4_port_info __devinitdata = {
+	.chipset		= ide_pci,
+	.host_flags		= IDE_HFLAG_NO_DMA | /* no SFF-style DMA */
+				  IDE_HFLAG_NO_AUTOTUNE,
+	.mwdma_mask		= ATA_MWDMA2_ONLY,
+};
+
 static int __devinit
 sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
 {
@@ -593,6 +595,7 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
 	int h;
 	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
 	hw_regs_t hw;
+	struct ide_port_info d = sgiioc4_port_info;
 
 	/*
 	 * Find an empty HWIF; if none available, return -ENOMEM.
@@ -641,7 +644,6 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
 	ide_init_port_hw(hwif, &hw);
 
 	hwif->dev = &dev->dev;
-	hwif->channel = 0;	/* Single Channel chip */
 
 	/* The IOC4 uses MMIO rather than Port IO. */
 	default_hwif_mmiops(hwif);
@@ -649,15 +651,17 @@ sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
 	/* Initializing chipset IRQ Registers */
 	writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
 
-	if (dma_base == 0 || ide_dma_sgiioc4(hwif, dma_base))
+	if (dma_base == 0 || ide_dma_sgiioc4(hwif, dma_base)) {
 		printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n",
 				 hwif->name, DRV_NAME);
+		d.mwdma_mask = 0;
+	}
 
 	ide_init_sgiioc4(hwif);
 
 	idx[0] = hwif->index;
 
-	if (ide_device_add(idx))
+	if (ide_device_add(idx, &d))
 		return -EIO;
 
 	return 0;
diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 4877bc8..ef5b39f 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -39,7 +39,6 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
 #include <linux/init.h>
@@ -332,15 +331,18 @@ static int siimage_mmio_ide_dma_test_irq (ide_drive_t *drive)
 {
 	ide_hwif_t *hwif	= HWIF(drive);
 	unsigned long addr	= siimage_selreg(hwif, 0x1);
+	void __iomem *sata_error_addr
+		= (void __iomem *)hwif->sata_scr[SATA_ERROR_OFFSET];
 
-	if (SATA_ERROR_REG) {
+	if (sata_error_addr) {
 		unsigned long base = (unsigned long)hwif->hwif_data;
-
 		u32 ext_stat = readl((void __iomem *)(base + 0x10));
 		u8 watchdog = 0;
+
 		if (ext_stat & ((hwif->channel) ? 0x40 : 0x10)) {
-			u32 sata_error = readl((void __iomem *)SATA_ERROR_REG);
-			writel(sata_error, (void __iomem *)SATA_ERROR_REG);
+			u32 sata_error = readl(sata_error_addr);
+
+			writel(sata_error, sata_error_addr);
 			watchdog = (sata_error & 0x00680000) ? 1 : 0;
 			printk(KERN_WARNING "%s: sata_error = 0x%08x, "
 				"watchdog = %d, %s\n",
@@ -419,13 +421,17 @@ static int sil_sata_busproc(ide_drive_t * drive, int state)
 
 static int sil_sata_reset_poll(ide_drive_t *drive)
 {
-	if (SATA_STATUS_REG) {
-		ide_hwif_t *hwif	= HWIF(drive);
+	ide_hwif_t *hwif = drive->hwif;
+	void __iomem *sata_status_addr
+		= (void __iomem *)hwif->sata_scr[SATA_STATUS_OFFSET];
 
-		/* SATA_STATUS_REG is valid only when in MMIO mode */
-		if ((readl((void __iomem *)SATA_STATUS_REG) & 0x03) != 0x03) {
+	if (sata_status_addr) {
+		/* SATA Status is available only when in MMIO mode */
+		u32 sata_stat = readl(sata_status_addr);
+
+		if ((sata_stat & 0x03) != 0x03) {
 			printk(KERN_WARNING "%s: reset phy dead, status=0x%08x\n",
-				hwif->name, readl((void __iomem *)SATA_STATUS_REG));
+					    hwif->name, sata_stat);
 			HWGROUP(drive)->polling = 0;
 			return ide_started;
 		}
@@ -827,15 +833,14 @@ static void __devinit init_hwif_siimage(ide_hwif_t *hwif)
 	} else
 		hwif->udma_filter = &sil_pata_udma_filter;
 
+	hwif->cable_detect = ata66_siimage;
+
 	if (hwif->dma_base == 0)
 		return;
 
 	if (sata)
 		hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA;
 
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = ata66_siimage(hwif);
-
 	if (hwif->mmio) {
 		hwif->ide_dma_test_irq = &siimage_mmio_ide_dma_test_irq;
 	} else {
diff --git a/drivers/ide/pci/sis5513.c b/drivers/ide/pci/sis5513.c
index 2a461de..512bb4c 100644
--- a/drivers/ide/pci/sis5513.c
+++ b/drivers/ide/pci/sis5513.c
@@ -47,20 +47,11 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
-
-#include <linux/interrupt.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 
-#include <asm/irq.h>
-
 #include "ide-timing.h"
 
 /* registers layout and init values are chipset family dependant */
@@ -565,13 +556,12 @@ static void __devinit init_hwif_sis5513 (ide_hwif_t *hwif)
 	if (chipset_family >= ATA_133)
 		hwif->udma_filter = sis5513_ata133_udma_filter;
 
+	hwif->cable_detect = ata66_sis5513;
+
 	if (hwif->dma_base == 0)
 		return;
 
 	hwif->ultra_mask = udma_rates[chipset_family];
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = ata66_sis5513(hwif);
 }
 
 static const struct ide_port_info sis5513_chipset __devinitdata = {
diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index da13a12..ee261ae 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -17,17 +17,11 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
 
 #include <asm/io.h>
-#include <asm/dma.h>
 
 #undef DEBUG
 
diff --git a/drivers/ide/pci/slc90e66.c b/drivers/ide/pci/slc90e66.c
index a6cf810..65f4c2f 100644
--- a/drivers/ide/pci/slc90e66.c
+++ b/drivers/ide/pci/slc90e66.c
@@ -10,15 +10,11 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/ioport.h>
 #include <linux/pci.h>
 #include <linux/hdreg.h>
 #include <linux/ide.h>
-#include <linux/delay.h>
 #include <linux/init.h>
 
-#include <asm/io.h>
-
 static DEFINE_SPINLOCK(slc90e66_lock);
 
 static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
@@ -118,23 +114,23 @@ static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed)
 	}
 }
 
-static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
+static u8 __devinit slc90e66_cable_detect(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
-	u8 reg47 = 0;
-	u8 mask = hwif->channel ? 0x01 : 0x02;  /* bit0:Primary */
-
-	hwif->set_pio_mode = &slc90e66_set_pio_mode;
-	hwif->set_dma_mode = &slc90e66_set_dma_mode;
+	u8 reg47 = 0, mask = hwif->channel ? 0x01 : 0x02;
 
 	pci_read_config_byte(dev, 0x47, &reg47);
 
-	if (hwif->dma_base == 0)
-		return;
+	/* bit[0(1)]: 0:80, 1:40 */
+	return (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
+static void __devinit init_hwif_slc90e66(ide_hwif_t *hwif)
+{
+	hwif->set_pio_mode = &slc90e66_set_pio_mode;
+	hwif->set_dma_mode = &slc90e66_set_dma_mode;
 
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		/* bit[0(1)]: 0:80, 1:40 */
-		hwif->cbl = (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+	hwif->cable_detect = slc90e66_cable_detect;
 }
 
 static const struct ide_port_info slc90e66_chipset __devinitdata = {
diff --git a/drivers/ide/pci/tc86c001.c b/drivers/ide/pci/tc86c001.c
index 9fbbb4f..2ef2ed2 100644
--- a/drivers/ide/pci/tc86c001.c
+++ b/drivers/ide/pci/tc86c001.c
@@ -160,6 +160,19 @@ static int tc86c001_busproc(ide_drive_t *drive, int state)
 	return 0;
 }
 
+static u8 __devinit tc86c001_cable_detect(ide_hwif_t *hwif)
+{
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
+	unsigned long sc_base = pci_resource_start(dev, 5);
+	u16 scr1 = inw(sc_base + 0x00);
+
+	/*
+	 * System Control  1 Register bit 13 (PDIAGN):
+	 * 0=80-pin cable, 1=40-pin cable
+	 */
+	return (scr1 & 0x2000) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
+}
+
 static void __devinit init_hwif_tc86c001(ide_hwif_t *hwif)
 {
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
@@ -183,6 +196,8 @@ static void __devinit init_hwif_tc86c001(ide_hwif_t *hwif)
 
 	hwif->busproc	= &tc86c001_busproc;
 
+	hwif->cable_detect = tc86c001_cable_detect;
+
 	if (!hwif->dma_base)
 		return;
 
@@ -196,15 +211,6 @@ static void __devinit init_hwif_tc86c001(ide_hwif_t *hwif)
 	hwif->rqsize	 = 0xffff;
 
 	hwif->dma_start 	= &tc86c001_dma_start;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
-		/*
-		 * System Control  1 Register bit 13 (PDIAGN):
-		 * 0=80-pin cable, 1=40-pin cable
-		 */
-		scr1 = inw(sc_base + 0x00);
-		hwif->cbl = (scr1 & 0x2000) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
-	}
 }
 
 static unsigned int __devinit init_chipset_tc86c001(struct pci_dev *dev,
diff --git a/drivers/ide/pci/triflex.c b/drivers/ide/pci/triflex.c
index 852b726..a67d02a 100644
--- a/drivers/ide/pci/triflex.c
+++ b/drivers/ide/pci/triflex.c
@@ -28,11 +28,6 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/hdreg.h>
 #include <linux/pci.h>
 #include <linux/ide.h>
diff --git a/drivers/ide/pci/trm290.c b/drivers/ide/pci/trm290.c
index d9ebb69..de750f7 100644
--- a/drivers/ide/pci/trm290.c
+++ b/drivers/ide/pci/trm290.c
@@ -131,14 +131,12 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/mm.h>
 #include <linux/ioport.h>
 #include <linux/interrupt.h>
 #include <linux/blkdev.h>
 #include <linux/init.h>
 #include <linux/hdreg.h>
 #include <linux/pci.h>
-#include <linux/delay.h>
 #include <linux/ide.h>
 
 #include <asm/io.h>
@@ -179,10 +177,7 @@ static void trm290_selectproc (ide_drive_t *drive)
 
 static void trm290_dma_exec_cmd(ide_drive_t *drive, u8 command)
 {
-	BUG_ON(HWGROUP(drive)->handler != NULL);	/* paranoia check */
-	ide_set_handler(drive, &ide_dma_intr, WAIT_CMD, NULL);
-	/* issue cmd to drive */
-	outb(command, IDE_COMMAND_REG);
+	ide_execute_command(drive, command, &ide_dma_intr, WAIT_CMD, NULL);
 }
 
 static int trm290_dma_setup(ide_drive_t *drive)
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index 24cb904..f3f79f8 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -26,15 +26,11 @@
 
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/blkdev.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 #include <linux/dmi.h>
 
-#include <asm/io.h>
-
 #ifdef CONFIG_PPC_CHRP
 #include <asm/processor.h>
 #endif
@@ -424,11 +420,7 @@ static void __devinit init_hwif_via82cxxx(ide_hwif_t *hwif)
 	hwif->set_pio_mode = &via_set_pio_mode;
 	hwif->set_dma_mode = &via_set_drive;
 
-	if (!hwif->dma_base)
-		return;
-
-	if (hwif->cbl != ATA_CBL_PATA40_SHORT)
-		hwif->cbl = via82cxxx_cable_detect(hwif);
+	hwif->cable_detect = via82cxxx_cable_detect;
 }
 
 static const struct ide_port_info via82cxxx_chipset __devinitdata = {
diff --git a/drivers/ide/ppc/mpc8xx.c b/drivers/ide/ppc/mpc8xx.c
index 45c1d55..06190b1 100644
--- a/drivers/ide/ppc/mpc8xx.c
+++ b/drivers/ide/ppc/mpc8xx.c
@@ -848,7 +848,7 @@ static int __init mpc8xx_ide_probe(void)
 #endif
 #endif
 
-	ide_device_add(idx);
+	ide_device_add(idx, NULL);
 
 	return 0;
 }
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 23112ef..12ac3bf 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -412,7 +412,7 @@ kauai_lookup_timing(struct kauai_timing* table, int cycle_time)
  */
 #define IDE_WAKEUP_DELAY	(1*HZ)
 
-static void pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif);
+static int pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif);
 static int pmac_ide_build_dmatable(ide_drive_t *drive, struct request *rq);
 static void pmac_ide_selectproc(ide_drive_t *drive);
 static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
@@ -1003,6 +1003,17 @@ pmac_ide_do_resume(ide_hwif_t *hwif)
 	return 0;
 }
 
+static const struct ide_port_info pmac_port_info = {
+	.chipset		= ide_pmac,
+	.host_flags		= IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
+				  IDE_HFLAG_PIO_NO_DOWNGRADE |
+				  IDE_HFLAG_POST_SET_MODE |
+				  IDE_HFLAG_NO_DMA | /* no SFF-style DMA */
+				  IDE_HFLAG_UNMASK_IRQS,
+	.pio_mask		= ATA_PIO4,
+	.mwdma_mask		= ATA_MWDMA2,
+};
+
 /*
  * Setup, register & probe an IDE channel driven by this driver, this is
  * called by one of the 2 probe functions (macio or PCI). Note that a channel
@@ -1016,23 +1027,28 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 	struct device_node *np = pmif->node;
 	const int *bidp;
 	u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+	struct ide_port_info d = pmac_port_info;
 
 	pmif->cable_80 = 0;
 	pmif->broken_dma = pmif->broken_dma_warn = 0;
-	if (of_device_is_compatible(np, "shasta-ata"))
+	if (of_device_is_compatible(np, "shasta-ata")) {
 		pmif->kind = controller_sh_ata6;
-	else if (of_device_is_compatible(np, "kauai-ata"))
+		d.udma_mask = ATA_UDMA6;
+	} else if (of_device_is_compatible(np, "kauai-ata")) {
 		pmif->kind = controller_un_ata6;
-	else if (of_device_is_compatible(np, "K2-UATA"))
+		d.udma_mask = ATA_UDMA5;
+	} else if (of_device_is_compatible(np, "K2-UATA")) {
 		pmif->kind = controller_k2_ata6;
-	else if (of_device_is_compatible(np, "keylargo-ata")) {
-		if (strcmp(np->name, "ata-4") == 0)
+		d.udma_mask = ATA_UDMA5;
+	} else if (of_device_is_compatible(np, "keylargo-ata")) {
+		if (strcmp(np->name, "ata-4") == 0) {
 			pmif->kind = controller_kl_ata4;
-		else
+			d.udma_mask = ATA_UDMA4;
+		} else
 			pmif->kind = controller_kl_ata3;
-	} else if (of_device_is_compatible(np, "heathrow-ata"))
+	} else if (of_device_is_compatible(np, "heathrow-ata")) {
 		pmif->kind = controller_heathrow;
-	else {
+	} else {
 		pmif->kind = controller_ohare;
 		pmif->broken_dma = 1;
 	}
@@ -1101,19 +1117,10 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 	/* Tell common code _not_ to mess with resources */
 	hwif->mmio = 1;
 	hwif->hwif_data = pmif;
-	hw->chipset = ide_pmac;
 	ide_init_port_hw(hwif, hw);
 	hwif->noprobe = pmif->mediabay;
 	hwif->hold = pmif->mediabay;
 	hwif->cbl = pmif->cable_80 ? ATA_CBL_PATA80 : ATA_CBL_PATA40;
-	hwif->drives[0].unmask = 1;
-	hwif->drives[1].unmask = 1;
-	hwif->drives[0].autotune = IDE_TUNE_AUTO;
-	hwif->drives[1].autotune = IDE_TUNE_AUTO;
-	hwif->host_flags = IDE_HFLAG_SET_PIO_MODE_KEEP_DMA |
-			   IDE_HFLAG_PIO_NO_DOWNGRADE |
-			   IDE_HFLAG_POST_SET_MODE;
-	hwif->pio_mask = ATA_PIO4;
 	hwif->set_pio_mode = pmac_ide_set_pio_mode;
 	if (pmif->kind == controller_un_ata6
 	    || pmif->kind == controller_k2_ata6
@@ -1133,14 +1140,16 @@ pmac_ide_setup_device(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif, hw_regs_t *hw)
 #endif /* CONFIG_PMAC_MEDIABAY */
 
 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
+	if (pmif->cable_80 == 0)
+		d.udma_mask &= ATA_UDMA2;
 	/* has a DBDMA controller channel */
-	if (pmif->dma_regs)
-		pmac_ide_setup_dma(pmif, hwif);
-#endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
+	if (pmif->dma_regs == 0 || pmac_ide_setup_dma(pmif, hwif) < 0)
+#endif
+		d.udma_mask = d.mwdma_mask = 0;
 
 	idx[0] = hwif->index;
 
-	ide_device_add(idx);
+	ide_device_add(idx, &d);
 
 	return 0;
 }
@@ -1721,8 +1730,7 @@ pmac_ide_dma_lost_irq (ide_drive_t *drive)
  * Allocate the data structures needed for using DMA with an interface
  * and fill the proper list of functions pointers
  */
-static void __devinit
-pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
+static int __devinit pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 {
 	struct pci_dev *dev = to_pci_dev(hwif->dev);
 
@@ -1730,7 +1738,7 @@ pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 	 * DMA routines ...
 	 */
 	if (dev == NULL)
-		return;
+		return -ENODEV;
 	/*
 	 * Allocate space for the DBDMA commands.
 	 * The +2 is +1 for the stop command and +1 to allow for
@@ -1743,7 +1751,7 @@ pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 	if (pmif->dma_table_cpu == NULL) {
 		printk(KERN_ERR "%s: unable to allocate DMA command list\n",
 		       hwif->name);
-		return;
+		return -ENOMEM;
 	}
 
 	hwif->sg_max_nents = MAX_DCMDS;
@@ -1757,29 +1765,7 @@ pmac_ide_setup_dma(pmac_ide_hwif_t *pmif, ide_hwif_t *hwif)
 	hwif->dma_timeout = &ide_dma_timeout;
 	hwif->dma_lost_irq = &pmac_ide_dma_lost_irq;
 
-	switch(pmif->kind) {
-		case controller_sh_ata6:
-			hwif->ultra_mask = pmif->cable_80 ? 0x7f : 0x07;
-			hwif->mwdma_mask = 0x07;
-			hwif->swdma_mask = 0x00;
-			break;
-		case controller_un_ata6:
-		case controller_k2_ata6:
-			hwif->ultra_mask = pmif->cable_80 ? 0x3f : 0x07;
-			hwif->mwdma_mask = 0x07;
-			hwif->swdma_mask = 0x00;
-			break;
-		case controller_kl_ata4:
-			hwif->ultra_mask = pmif->cable_80 ? 0x1f : 0x07;
-			hwif->mwdma_mask = 0x07;
-			hwif->swdma_mask = 0x00;
-			break;
-		default:
-			hwif->ultra_mask = 0x00;
-			hwif->mwdma_mask = 0x07;
-			hwif->swdma_mask = 0x00;
-			break;
-	}
+	return 0;
 }
 
 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index 05db429..634e3f6 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -339,7 +339,8 @@ static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *
  *	ide_hwif_configure	-	configure an IDE interface
  *	@dev: PCI device holding interface
  *	@d: IDE port info
- *	@mate: Paired interface if any
+ *	@port: port number
+ *	@irq: PCI IRQ
  *
  *	Perform the initial set up for the hardware interface structure. This
  *	is done per interface port rather than per PCI device. There may be
@@ -348,7 +349,9 @@ static int ide_pci_check_iomem(struct pci_dev *dev, const struct ide_port_info *
  *	Returns the new hardware interface structure, or NULL on a failure
  */
 
-static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *mate, int port, int irq)
+static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev,
+				      const struct ide_port_info *d,
+				      unsigned int port, int irq)
 {
 	unsigned long ctl = 0, base = 0;
 	ide_hwif_t *hwif;
@@ -394,29 +397,24 @@ static ide_hwif_t *ide_hwif_configure(struct pci_dev *dev, const struct ide_port
 
 	hwif->dev = &dev->dev;
 	hwif->cds = d;
-	hwif->channel = port;
 
-	if (mate) {
-		hwif->mate = mate;
-		mate->mate = hwif;
-	}
 	return hwif;
 }
 
+#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
 /**
  *	ide_hwif_setup_dma	-	configure DMA interface
- *	@dev: PCI device
- *	@d: IDE port info
  *	@hwif: IDE interface
+ *	@d: IDE port info
  *
  *	Set up the DMA base for the interface. Enable the master bits as
  *	necessary and attempt to bring the device DMA into a ready to use
  *	state
  */
 
-static void ide_hwif_setup_dma(struct pci_dev *dev, const struct ide_port_info *d, ide_hwif_t *hwif)
+void ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d)
 {
-#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+	struct pci_dev *dev = to_pci_dev(hwif->dev);
 	u16 pcicmd;
 
 	pci_read_config_word(dev, PCI_COMMAND, &pcicmd);
@@ -448,8 +446,8 @@ static void ide_hwif_setup_dma(struct pci_dev *dev, const struct ide_port_info *
 				"(BIOS)\n", hwif->name, d->name);
 		}
 	}
-#endif /* CONFIG_BLK_DEV_IDEDMA_PCI*/
 }
+#endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
 
 /**
  *	ide_setup_pci_controller	-	set up IDE PCI
@@ -511,7 +509,7 @@ out:
 void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int pciirq, u8 *idx)
 {
 	int channels = (d->host_flags & IDE_HFLAG_SINGLE) ? 1 : 2, port;
-	ide_hwif_t *hwif, *mate = NULL;
+	ide_hwif_t *hwif;
 	u8 tmp;
 
 	/*
@@ -527,56 +525,11 @@ void ide_pci_setup_ports(struct pci_dev *dev, const struct ide_port_info *d, int
 			continue;	/* port not enabled */
 		}
 
-		if ((hwif = ide_hwif_configure(dev, d, mate, port, pciirq)) == NULL)
+		hwif = ide_hwif_configure(dev, d, port, pciirq);
+		if (hwif == NULL)
 			continue;
 
 		*(idx + port) = hwif->index;
-
-		if (d->init_iops)
-			d->init_iops(hwif);
-
-		if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
-			ide_hwif_setup_dma(dev, d, hwif);
-
-		if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
-		    (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
-			hwif->irq = port ? 15 : 14;
-
-		hwif->host_flags = d->host_flags;
-		hwif->pio_mask = d->pio_mask;
-
-		if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
-			hwif->mate->serialized = hwif->serialized = 1;
-
-		if (d->host_flags & IDE_HFLAG_IO_32BIT) {
-			hwif->drives[0].io_32bit = 1;
-			hwif->drives[1].io_32bit = 1;
-		}
-
-		if (d->host_flags & IDE_HFLAG_UNMASK_IRQS) {
-			hwif->drives[0].unmask = 1;
-			hwif->drives[1].unmask = 1;
-		}
-
-		if (hwif->dma_base) {
-			hwif->swdma_mask = d->swdma_mask;
-			hwif->mwdma_mask = d->mwdma_mask;
-			hwif->ultra_mask = d->udma_mask;
-		}
-
-		hwif->drives[0].autotune = 1;
-		hwif->drives[1].autotune = 1;
-
-		if (d->host_flags & IDE_HFLAG_RQSIZE_256)
-			hwif->rqsize = 256;
-
-		if (d->init_hwif)
-			/* Call chipset-specific routine
-			 * for each enabled hwif
-			 */
-			d->init_hwif(hwif);
-
-		mate = hwif;
 	}
 }
 
@@ -658,7 +611,7 @@ int ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d)
 	ret = do_ide_setup_pci_device(dev, d, &idx[0], 1);
 
 	if (ret >= 0)
-		ide_device_add(idx);
+		ide_device_add(idx, d);
 
 	return ret;
 }
@@ -682,7 +635,7 @@ int ide_setup_pci_devices(struct pci_dev *dev1, struct pci_dev *dev2,
 			goto out;
 	}
 
-	ide_device_add(idx);
+	ide_device_add(idx, d);
 out:
 	return ret;
 }
diff --git a/drivers/macintosh/mediabay.c b/drivers/macintosh/mediabay.c
index 18dde2a..de9ebbf 100644
--- a/drivers/macintosh/mediabay.c
+++ b/drivers/macintosh/mediabay.c
@@ -595,7 +595,7 @@ static void media_bay_step(int i)
     	        if (bay->cd_index >= 0) {
 			printk(KERN_DEBUG "Unregistering mb %d ide, index:%d\n", i,
 			       bay->cd_index);
-			ide_unregister(bay->cd_index);
+			ide_unregister(bay->cd_index, 1, 1);
 			bay->cd_index = -1;
 		}
 	    	if (bay->cd_retry) {
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 5ed0006..6c4f0f0 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -588,19 +588,14 @@ static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
 		hwif->sg_mapped = 0;
 	}
 
-	SELECT_DRIVE(drive);
-
 	ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK, bcount, dma);
 
 	if (dma)
 		set_bit(PC_DMA_OK, &pc->flags);
 
 	if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) {
-		BUG_ON(HWGROUP(drive)->handler != NULL);
-		ide_set_handler(drive, &idescsi_transfer_pc,
-				get_timeout(pc), idescsi_expiry);
-		/* Issue the packet command */
-		HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
+		ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc,
+				    get_timeout(pc), idescsi_expiry);
 		return ide_started;
 	} else {
 		/* Issue the packet command */
diff --git a/include/linux/hdreg.h b/include/linux/hdreg.h
index ff43f8d..3882013 100644
--- a/include/linux/hdreg.h
+++ b/include/linux/hdreg.h
@@ -706,8 +706,10 @@ struct hd_driveid {
  */
 #define IDE_NICE_DSC_OVERLAP	(0)	/* per the DSC overlap protocol */
 #define IDE_NICE_ATAPI_OVERLAP	(1)	/* not supported yet */
-#define IDE_NICE_0		(2)	/* when sure that it won't affect us */
 #define IDE_NICE_1		(3)	/* when probably won't affect us much */
+#ifndef __KERNEL__
+#define IDE_NICE_0		(2)	/* when sure that it won't affect us */
 #define IDE_NICE_2		(4)	/* when we know it's on our expense */
+#endif
 
 #endif	/* _LINUX_HDREG_H */
diff --git a/include/linux/ide.h b/include/linux/ide.h
index ec10b2a..367c170 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -112,18 +112,12 @@ typedef unsigned char	byte;	/* used everywhere */
 #define SATA_NR_PORTS		(3)	/* 16 possible ?? */
 
 #define SATA_STATUS_OFFSET	(0)
-#define SATA_STATUS_REG		(HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
 #define SATA_ERROR_OFFSET	(1)
-#define SATA_ERROR_REG		(HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
 #define SATA_CONTROL_OFFSET	(2)
-#define SATA_CONTROL_REG	(HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
 
 #define SATA_MISC_OFFSET	(0)
-#define SATA_MISC_REG		(HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
 #define SATA_PHY_OFFSET		(1)
-#define SATA_PHY_REG		(HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
 #define SATA_IEN_OFFSET		(2)
-#define SATA_IEN_REG		(HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
 
 /*
  * Our Physical Region Descriptor (PRD) table should be large enough
@@ -196,6 +190,7 @@ typedef struct hw_regs_s {
 } hw_regs_t;
 
 struct hwif_s * ide_find_port(unsigned long);
+struct hwif_s *ide_deprecated_find_port(unsigned long);
 void ide_init_port_data(struct hwif_s *, unsigned int);
 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
 
@@ -406,8 +401,6 @@ typedef struct ide_drive_s {
 	unsigned no_unmask	: 1;	/* disallow setting unmask bit */
 	unsigned no_io_32bit	: 1;	/* disallow enabling 32bit I/O */
 	unsigned atapi_overlap	: 1;	/* ATAPI overlap (not supported) */
-	unsigned nice0		: 1;	/* give obvious excess bandwidth */
-	unsigned nice2		: 1;	/* give a share in our own bandwidth */
 	unsigned doorlocking	: 1;	/* for removable only: door lock/unlock works */
 	unsigned nodma		: 1;	/* disallow DMA */
 	unsigned autotune	: 2;	/* 0=default, 1=autotune, 2=noautotune */
@@ -487,7 +480,6 @@ typedef struct hwif_s {
 	u8 major;	/* our major number */
 	u8 index;	/* 0 for ide0; 1 for ide1; ... */
 	u8 channel;	/* for dual-port chips: 0=primary, 1=secondary */
-	u8 straight8;	/* Alan's straight 8 check */
 	u8 bus_state;	/* power state of the IDE bus */
 
 	u32 host_flags;
@@ -513,6 +505,8 @@ typedef struct hwif_s {
 #if 0
 	ide_hwif_ops_t	*hwifops;
 #else
+	/* host specific initialization of devices on a port */
+	void	(*port_init_devs)(struct hwif_s *);
 	/* routine to program host for PIO mode */
 	void	(*set_pio_mode)(ide_drive_t *, const u8);
 	/* routine to program host for DMA mode */
@@ -535,6 +529,8 @@ typedef struct hwif_s {
 	u8 (*mdma_filter)(ide_drive_t *);
 	u8 (*udma_filter)(ide_drive_t *);
 
+	u8 (*cable_detect)(struct hwif_s *);
+
 	void (*ata_input_data)(ide_drive_t *, void *, u32);
 	void (*ata_output_data)(ide_drive_t *, void *, u32);
 
@@ -602,10 +598,9 @@ typedef struct hwif_s {
 	unsigned	serialized : 1;	/* serialized all channel operation */
 	unsigned	sharing_irq: 1;	/* 1 = sharing irq with another hwif */
 	unsigned	reset      : 1;	/* reset after probe */
-	unsigned	auto_poll  : 1; /* supports nop auto-poll */
 	unsigned	sg_mapped  : 1;	/* sg_table and sg_nents are ready */
-	unsigned	no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
 	unsigned	mmio       : 1; /* host uses MMIO */
+	unsigned	straight8  : 1;	/* Alan's straight 8 check */
 
 	struct device	gendev;
 	struct completion gendev_rel_comp; /* To deal with device release() */
@@ -625,6 +620,9 @@ typedef struct hwif_s {
 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 typedef int (ide_expiry_t)(ide_drive_t *);
 
+/* used by ide-cd, ide-floppy, etc. */
+typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
+
 typedef struct hwgroup_s {
 		/* irq handler, if active */
 	ide_startstop_t	(*handler)(ide_drive_t *);
@@ -708,6 +706,7 @@ typedef struct {
 void proc_ide_create(void);
 void proc_ide_destroy(void);
 void ide_proc_register_port(ide_hwif_t *);
+void ide_proc_port_register_devices(ide_hwif_t *);
 void ide_proc_unregister_port(ide_hwif_t *);
 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
@@ -740,6 +739,7 @@ void ide_pci_create_host_proc(const char *, get_info_t *);
 static inline void proc_ide_create(void) { ; }
 static inline void proc_ide_destroy(void) { ; }
 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
+static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
@@ -988,10 +988,8 @@ int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
 extern int system_bus_clock(void);
 
 extern int ide_driveid_update(ide_drive_t *);
-extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
 extern int ide_config_drive_speed(ide_drive_t *, u8);
 extern u8 eighty_ninty_three (ide_drive_t *);
-extern int set_transfer(ide_drive_t *, ide_task_t *);
 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
 
 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
@@ -1016,6 +1014,13 @@ extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *o
 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
 
+#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
+void ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
+#else
+static inline void ide_hwif_setup_dma(ide_hwif_t *hwif,
+				      const struct ide_port_info *d) { }
+#endif
+
 extern void default_hwif_iops(ide_hwif_t *);
 extern void default_hwif_mmiops(ide_hwif_t *);
 extern void default_hwif_transport(ide_hwif_t *);
@@ -1052,7 +1057,7 @@ enum {
 	IDE_HFLAG_NO_SET_MODE		= (1 << 9),
 	/* trust BIOS for programming chipset/device for DMA */
 	IDE_HFLAG_TRUST_BIOS_FOR_DMA	= (1 << 10),
-	/* host uses VDMA */
+	/* host uses VDMA (tied with IDE_HFLAG_CS5520 for now) */
 	IDE_HFLAG_VDMA			= (1 << 11),
 	/* ATAPI DMA is unsupported */
 	IDE_HFLAG_NO_ATAPI_DMA		= (1 << 12),
@@ -1062,8 +1067,10 @@ enum {
 	IDE_HFLAG_NO_DMA		= (1 << 14),
 	/* check if host is PCI IDE device before allowing DMA */
 	IDE_HFLAG_NO_AUTODMA		= (1 << 15),
+	/* don't autotune PIO */
+	IDE_HFLAG_NO_AUTOTUNE		= (1 << 16),
 	/* host is CS5510/CS5520 */
-	IDE_HFLAG_CS5520		= (1 << 16),
+	IDE_HFLAG_CS5520		= IDE_HFLAG_VDMA,
 	/* no LBA48 */
 	IDE_HFLAG_NO_LBA48		= (1 << 17),
 	/* no LBA48 DMA */
@@ -1089,6 +1096,10 @@ enum {
 	IDE_HFLAG_CLEAR_SIMPLEX		= (1 << 28),
 	/* DSC overlap is unsupported */
 	IDE_HFLAG_NO_DSC		= (1 << 29),
+	/* never use 32-bit I/O ops */
+	IDE_HFLAG_NO_IO_32BIT		= (1 << 30),
+	/* never unmask IRQs */
+	IDE_HFLAG_NO_UNMASK_IRQS	= (1 << 31),
 };
 
 #ifdef CONFIG_BLK_DEV_OFFBOARD
@@ -1144,6 +1155,7 @@ void ide_dma_off_quietly(ide_drive_t *);
 void ide_dma_off(ide_drive_t *);
 void ide_dma_on(ide_drive_t *);
 int ide_set_dma(ide_drive_t *);
+void ide_check_dma_crc(ide_drive_t *);
 ide_startstop_t ide_dma_intr(ide_drive_t *);
 
 int ide_build_sglist(ide_drive_t *, struct request *);
@@ -1171,6 +1183,7 @@ static inline void ide_dma_off(ide_drive_t *drive) { ; }
 static inline void ide_dma_on(ide_drive_t *drive) { ; }
 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
+static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
 #endif /* CONFIG_BLK_DEV_IDEDMA */
 
 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
@@ -1182,27 +1195,29 @@ extern int ide_acpi_exec_tfs(ide_drive_t *drive);
 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
 extern void ide_acpi_init(ide_hwif_t *hwif);
+void ide_acpi_port_init_devices(ide_hwif_t *);
 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
 #else
 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
+static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
 #endif
 
 void ide_remove_port_from_hwgroup(ide_hwif_t *);
 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
-extern void ide_unregister (unsigned int index);
+void ide_unregister(unsigned int, int, int);
 
 void ide_register_region(struct gendisk *);
 void ide_unregister_region(struct gendisk *);
 
 void ide_undecoded_slave(ide_drive_t *);
 
-int ide_device_add_all(u8 *idx);
-int ide_device_add(u8 idx[4]);
+int ide_device_add_all(u8 *idx, const struct ide_port_info *);
+int ide_device_add(u8 idx[4], const struct ide_port_info *);
 
 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
 {

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [git patches] IDE updates part #4
  2008-02-02 19:35 [git patches] IDE updates part #4 Bartlomiej Zolnierkiewicz
@ 2008-02-05 19:09 ` Linus Torvalds
  2008-02-06  0:48   ` Bartlomiej Zolnierkiewicz
  0 siblings, 1 reply; 4+ messages in thread
From: Linus Torvalds @ 2008-02-05 19:09 UTC (permalink / raw)
  To: Bartlomiej Zolnierkiewicz; +Cc: linux-ide, linux-kernel



On Sat, 2 Feb 2008, Bartlomiej Zolnierkiewicz wrote:
> 
> * next part of IDE probing code re-organization saga
>   (that would be me)

This seems to cause very irritating and bogus messages for me:

	Probing IDE interface ide0...
	Probing IDE interface ide1...
	ide2: I/O resource 0x0-0x7 not free.
	ide2: ports already in use, skipping probe
	ide3: I/O resource 0x0-0x7 not free.
	ide3: ports already in use, skipping probe
	ide4: I/O resource 0x0-0x7 not free.
	ide4: ports already in use, skipping probe
	ide5: I/O resource 0x0-0x7 not free.
	ide5: ports already in use, skipping probe
	ide6: I/O resource 0x0-0x7 not free.
	ide6: ports already in use, skipping probe
	ide7: I/O resource 0x0-0x7 not free.
	ide7: ports already in use, skipping probe
	ide8: I/O resource 0x0-0x7 not free.
	ide8: ports already in use, skipping probe
	ide9: I/O resource 0x0-0x7 not free.
	ide9: ports already in use, skipping probe

and that's just totally bogus. It shouldn't even request that region, 
since it's not been allocated!

So that "ide_device_add_all()" is missing some checks. Should it check the 
probe[] array like ideprobe_init() used to, or what?

		Linus

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [git patches] IDE updates part #4
  2008-02-05 19:09 ` Linus Torvalds
@ 2008-02-06  0:48   ` Bartlomiej Zolnierkiewicz
  0 siblings, 0 replies; 4+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2008-02-06  0:48 UTC (permalink / raw)
  To: Linus Torvalds; +Cc: linux-ide, linux-kernel


Hi Linus,

On Tuesday 05 February 2008, Linus Torvalds wrote:
> 
> On Sat, 2 Feb 2008, Bartlomiej Zolnierkiewicz wrote:
> > 
> > * next part of IDE probing code re-organization saga
> >   (that would be me)
> 
> This seems to cause very irritating and bogus messages for me:
> 
> 	Probing IDE interface ide0...
> 	Probing IDE interface ide1...
> 	ide2: I/O resource 0x0-0x7 not free.
> 	ide2: ports already in use, skipping probe
> 	ide3: I/O resource 0x0-0x7 not free.
> 	ide3: ports already in use, skipping probe
> 	ide4: I/O resource 0x0-0x7 not free.
> 	ide4: ports already in use, skipping probe
> 	ide5: I/O resource 0x0-0x7 not free.
> 	ide5: ports already in use, skipping probe
> 	ide6: I/O resource 0x0-0x7 not free.
> 	ide6: ports already in use, skipping probe
> 	ide7: I/O resource 0x0-0x7 not free.
> 	ide7: ports already in use, skipping probe
> 	ide8: I/O resource 0x0-0x7 not free.
> 	ide8: ports already in use, skipping probe
> 	ide9: I/O resource 0x0-0x7 not free.
> 	ide9: ports already in use, skipping probe
> 
> and that's just totally bogus. It shouldn't even request that region, 
> since it's not been allocated!
> 
> So that "ide_device_add_all()" is missing some checks. Should it check the 
> probe[] array like ideprobe_init() used to, or what?

This is ide-generic problem exhibited by recent ide_device_add_all() changes.
Fix below (it works for me) - you may merge the patch as it is or wait an hour
or so for the next IDE tree pull request.

Also sorry for the issue in the first place (it turned out that it slipped
my testing because I has been running with IDE_MAX_HWIFS=2 for some time :).


From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide-generic: probing bugfix

On Tuesday 05 February 2008, Linus Torvalds wrote:
> 
> On Sat, 2 Feb 2008, Bartlomiej Zolnierkiewicz wrote:
> > 
> > * next part of IDE probing code re-organization saga
> >   (that would be me)
> 
> This seems to cause very irritating and bogus messages for me:
> 
>       Probing IDE interface ide0...
>       Probing IDE interface ide1...
>       ide2: I/O resource 0x0-0x7 not free.
>       ide2: ports already in use, skipping probe
>       ide3: I/O resource 0x0-0x7 not free.
>       ide3: ports already in use, skipping probe
>       ide4: I/O resource 0x0-0x7 not free.
>       ide4: ports already in use, skipping probe
>       ide5: I/O resource 0x0-0x7 not free.
>       ide5: ports already in use, skipping probe
>       ide6: I/O resource 0x0-0x7 not free.
>       ide6: ports already in use, skipping probe
>       ide7: I/O resource 0x0-0x7 not free.
>       ide7: ports already in use, skipping probe
>       ide8: I/O resource 0x0-0x7 not free.
>       ide8: ports already in use, skipping probe
>       ide9: I/O resource 0x0-0x7 not free.
>       ide9: ports already in use, skipping probe
> 
> and that's just totally bogus. It shouldn't even request that region, 
> since it's not been allocated!

The commit 139ddfcab50e5eabcc88341c8743a990ac1be6a2 ("ide: move handling of
I/O resources out of ide_probe_port()") changed the ordering of hwif->noprobe
check vs ide_hwif_request_regions() call (so that we now reserve I/O regions
before checking for hwif->noprobe).  However ide-generic host driver depended
on hwif->noprobe to be set for skipping probing of empty ide_hwifs[] slots.

Fix it by passing only indexes of non-empty slots to ide_device_add_all()
from ide_generic_init().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
 drivers/ide/ide-generic.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

Index: b/drivers/ide/ide-generic.c
===================================================================
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -20,8 +20,14 @@ static int __init ide_generic_init(void)
 	if (ide_hwifs[0].io_ports[IDE_DATA_OFFSET])
 		ide_get_lock(NULL, NULL); /* for atari only */
 
-	for (i = 0; i < MAX_HWIFS; i++)
-		idx[i] = ide_hwifs[i].present ? 0xff : i;
+	for (i = 0; i < MAX_HWIFS; i++) {
+		ide_hwif_t *hwif = &ide_hwifs[i];
+
+		if (hwif->io_ports[IDE_DATA_OFFSET] && !hwif->present)
+			idx[i] = i;
+		else
+			idx[i] = 0xff;
+	}
 
 	ide_device_add_all(idx, NULL);
 

^ permalink raw reply	[flat|nested] 4+ messages in thread

* [git patches] IDE updates part 4
@ 2008-04-27 14:26 Bartlomiej Zolnierkiewicz
  0 siblings, 0 replies; 4+ messages in thread
From: Bartlomiej Zolnierkiewicz @ 2008-04-27 14:26 UTC (permalink / raw)
  To: Linus Torvalds; +Cc: Andrew Morton, Stephen Rothwell, linux-ide, linux-kernel


New day, new IDE updates...

- fix icside breakage caused by yesterday's updates (Al Viro)

- remove "pipelined" mode from ide-tape:
  - ~850 LOC gone with no loss of the functionality
  - performance impact should be negligable
  - makes the driver parseable for the mere mortals again
  - allows future driver enhancements
  (Borislav Petkov)

- remove the last user of /proc/ide/<chipset> interface (~250 LOC gone)
  (Alexey Dobriyan)

- add new interface for IDE kernel parameters
  - warm-plug / sysfs friendly (sysfs access to be enabled in the future)
  - simple (no internal parsing, -200 LOC when compared to the old one)
  - future proof (not dependent on the legacy naming of devices)

- misc changes


Linus, please pull from:

master.kernel.org:/pub/scm/linux/kernel/git/bart/ide-2.6.git/

to receive the following updates:

 Documentation/ide/ide-tape.txt      |  211 ++-----
 Documentation/ide/ide.txt           |  107 ++--
 Documentation/kernel-parameters.txt |    4 -
 drivers/ide/arm/bast-ide.c          |   12 +-
 drivers/ide/arm/icside.c            |   13 +-
 drivers/ide/arm/palm_bk3710.c       |   12 +-
 drivers/ide/arm/rapide.c            |    8 +-
 drivers/ide/cris/ide-cris.c         |   18 +-
 drivers/ide/h8300/ide-h8300.c       |    6 +-
 drivers/ide/ide-acpi.c              |   18 +-
 drivers/ide/ide-cd.c                |   12 +-
 drivers/ide/ide-floppy.c            |   12 +-
 drivers/ide/ide-io.c                |   42 +-
 drivers/ide/ide-iops.c              |   72 +--
 drivers/ide/ide-pnp.c               |    5 +-
 drivers/ide/ide-probe.c             |   73 +--
 drivers/ide/ide-proc.c              |    8 -
 drivers/ide/ide-tape.c              | 1191 ++++++-----------------------------
 drivers/ide/ide-taskfile.c          |   29 +-
 drivers/ide/ide.c                   |  360 ++++++-----
 drivers/ide/legacy/ali14xx.c        |    6 +-
 drivers/ide/legacy/buddha.c         |   14 +-
 drivers/ide/legacy/dtc2278.c        |    5 +-
 drivers/ide/legacy/falconide.c      |    6 +-
 drivers/ide/legacy/gayle.c          |   18 +-
 drivers/ide/legacy/ht6560b.c        |   11 +-
 drivers/ide/legacy/ide-4drives.c    |    2 +-
 drivers/ide/legacy/ide-cs.c         |   12 +-
 drivers/ide/legacy/ide_platform.c   |   10 +-
 drivers/ide/legacy/macide.c         |    4 +-
 drivers/ide/legacy/q40ide.c         |    6 +-
 drivers/ide/legacy/qd65xx.c         |   33 +-
 drivers/ide/legacy/umc8672.c        |    4 +-
 drivers/ide/mips/au1xxx-ide.c       |    7 +-
 drivers/ide/mips/swarm.c            |    6 +-
 drivers/ide/pci/aec62xx.c           |    2 +-
 drivers/ide/pci/alim15x3.c          |  242 +-------
 drivers/ide/pci/amd74xx.c           |    2 +-
 drivers/ide/pci/cmd640.c            |   89 +--
 drivers/ide/pci/cmd64x.c            |    6 +-
 drivers/ide/pci/cy82c693.c          |    4 +-
 drivers/ide/pci/delkin_cb.c         |    9 +-
 drivers/ide/pci/hpt366.c            |    2 +-
 drivers/ide/pci/ns87415.c           |   12 +-
 drivers/ide/pci/opti621.c           |    7 +-
 drivers/ide/pci/scc_pata.c          |   11 +-
 drivers/ide/pci/sgiioc4.c           |   27 +-
 drivers/ide/pci/siimage.c           |   27 +-
 drivers/ide/pci/trm290.c            |    2 +-
 drivers/ide/pci/via82cxxx.c         |    2 +-
 drivers/ide/ppc/mpc8xx.c            |   28 +-
 drivers/ide/ppc/pmac.c              |    7 +-
 drivers/scsi/ide-scsi.c             |   13 +-
 include/asm-arm/arch-sa1100/ide.h   |    6 +-
 include/asm-cris/arch-v10/ide.h     |   11 +-
 include/linux/ide.h                 |   95 ++--
 56 files changed, 892 insertions(+), 2069 deletions(-)


Al Viro (1):
      ide: fix icside breakage

Alexey Dobriyan (2):
      ide: remove /proc/ide/ali
      ide: remove now unused ide_pci_create_host_proc()

Bartlomiej Zolnierkiewicz (19):
      ide: add "ignore_cable" parameter (take 2)
      ide: remove obsoleted "idex=serialize" kernel parameter
      ide: remove obsoleted "idex=reset" kernel parameter
      ide: remove obsoleted "idex=" kernel parameters
      ide: remove obsoleted "hdx=noautotune" kernel parameter
      ide: add "vlb|pci_clock=" parameter
      ide: mark "idebus=" kernel parameter as obsoleted (take 2)
      ide: always auto-tune PIO in legacy VLB host drivers
      cmd640: always auto-tune PIO
      ide: remove IDE_HFLAG_NO_AUTOTUNE host flag
      ide: remove obsoleted "hdx=autotune" kernel parameter
      ide: add "nodma|noflush|noprobe|nowerr=" parameters
      ide: add "cdrom=" and "chs=" parameters
      gayle: add "doubler" parameter
      ide: add "noacpi" / "acpigtf" / "acpionboot" parameters
      mpc8xx-ide: use ide_find_port()
      ide: sanitize ide_unregister() usage
      ide: make ide_unregister() take 'ide_hwif_t *' as an argument (take 2)
      ide: add struct ide_io_ports (take 3)

Borislav Petkov (27):
      ide-tape: remove tape->cache_stage
      ide-tape: remove pipeline-specific code from idetape_add_chrdev_write_request
      ide-tape remove pipeline speed/control calculations
      ide-tape: remove pipeline-specific code from idetape_add_chrdev_read_request()
      ide-tape: remove unused parameter from idetape_copy_stage_to_user
      ide-tape: remove unused parameter from idetape_copy_stage_from_user
      ide-tape: remove pipeline-specific code in idetape_space_over_filemarks()
      ide-tape: remove idetape_pipeline_size()
      ide-tape: remove idetape_remove_stage_head()
      ide-tape: remove pipeline-specific code from idetape_end_request()
      ide-tape: unwrap idetape_queue_pc_tail()
      ide-tape: remove remaining pipeline functionality
      ide-tape: remove pipelined mode tape control flags
      ide-tape: remove pipeline-specific members from struct ide_tape_obj
      ide-tape: remove pipelined mode parameters
      ide-tape: remove misc references to pipelined operation in the comments
      ide-tape: remove pipelined mode description from Documentation/ide/ide-tape.txt
      ide-tape: remove comments markup from Documentation/ide/ide-tape.txt
      ide-tape: improve buffer allocation strategy
      ide-tape: mv tape->stage_size tape->buffer_size
      ide-tape: mv tape->pages_per_stage tape->pages_per_buffer
      ide-tape: improve buffer pages freeing strategy
      ide-tape: make __idetape_discard_read_pipeline() of type void
      ide-tape: mv idetape_discard_read_pipeline ide_tape_discard_merge_buffer
      ide-tape: mv idetape_empty_write_pipeline ide_tape_flush_merge_buffer
      ide-tape: mv tape->merge_stage_size tape->merge_bh_size
      ide-tape: remove tape->merge_stage


diff --git a/Documentation/ide/ide-tape.txt b/Documentation/ide/ide-tape.txt
index 658f271..3f348a0 100644
--- a/Documentation/ide/ide-tape.txt
+++ b/Documentation/ide/ide-tape.txt
@@ -1,146 +1,65 @@
-/*
- * IDE ATAPI streaming tape driver.
- *
- * This driver is a part of the Linux ide driver.
- *
- * The driver, in co-operation with ide.c, basically traverses the
- * request-list for the block device interface. The character device
- * interface, on the other hand, creates new requests, adds them
- * to the request-list of the block device, and waits for their completion.
- *
- * Pipelined operation mode is now supported on both reads and writes.
- *
- * The block device major and minor numbers are determined from the
- * tape's relative position in the ide interfaces, as explained in ide.c.
- *
- * The character device interface consists of the following devices:
- *
- * ht0		major 37, minor 0	first  IDE tape, rewind on close.
- * ht1		major 37, minor 1	second IDE tape, rewind on close.
- * ...
- * nht0		major 37, minor 128	first  IDE tape, no rewind on close.
- * nht1		major 37, minor 129	second IDE tape, no rewind on close.
- * ...
- *
- * The general magnetic tape commands compatible interface, as defined by
- * include/linux/mtio.h, is accessible through the character device.
- *
- * General ide driver configuration options, such as the interrupt-unmask
- * flag, can be configured by issuing an ioctl to the block device interface,
- * as any other ide device.
- *
- * Our own ide-tape ioctl's can be issued to either the block device or
- * the character device interface.
- *
- * Maximal throughput with minimal bus load will usually be achieved in the
- * following scenario:
- *
- *	1.	ide-tape is operating in the pipelined operation mode.
- *	2.	No buffering is performed by the user backup program.
- *
- * Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
- *
- * Here are some words from the first releases of hd.c, which are quoted
- * in ide.c and apply here as well:
- *
- * | Special care is recommended.  Have Fun!
- *
- *
- * An overview of the pipelined operation mode.
- *
- * In the pipelined write mode, we will usually just add requests to our
- * pipeline and return immediately, before we even start to service them. The
- * user program will then have enough time to prepare the next request while
- * we are still busy servicing previous requests. In the pipelined read mode,
- * the situation is similar - we add read-ahead requests into the pipeline,
- * before the user even requested them.
- *
- * The pipeline can be viewed as a "safety net" which will be activated when
- * the system load is high and prevents the user backup program from keeping up
- * with the current tape speed. At this point, the pipeline will get
- * shorter and shorter but the tape will still be streaming at the same speed.
- * Assuming we have enough pipeline stages, the system load will hopefully
- * decrease before the pipeline is completely empty, and the backup program
- * will be able to "catch up" and refill the pipeline again.
- *
- * When using the pipelined mode, it would be best to disable any type of
- * buffering done by the user program, as ide-tape already provides all the
- * benefits in the kernel, where it can be done in a more efficient way.
- * As we will usually not block the user program on a request, the most
- * efficient user code will then be a simple read-write-read-... cycle.
- * Any additional logic will usually just slow down the backup process.
- *
- * Using the pipelined mode, I get a constant over 400 KBps throughput,
- * which seems to be the maximum throughput supported by my tape.
- *
- * However, there are some downfalls:
- *
- *	1.	We use memory (for data buffers) in proportional to the number
- *		of pipeline stages (each stage is about 26 KB with my tape).
- *	2.	In the pipelined write mode, we cheat and postpone error codes
- *		to the user task. In read mode, the actual tape position
- *		will be a bit further than the last requested block.
- *
- * Concerning (1):
- *
- *	1.	We allocate stages dynamically only when we need them. When
- *		we don't need them, we don't consume additional memory. In
- *		case we can't allocate stages, we just manage without them
- *		(at the expense of decreased throughput) so when Linux is
- *		tight in memory, we will not pose additional difficulties.
- *
- *	2.	The maximum number of stages (which is, in fact, the maximum
- *		amount of memory) which we allocate is limited by the compile
- *		time parameter IDETAPE_MAX_PIPELINE_STAGES.
- *
- *	3.	The maximum number of stages is a controlled parameter - We
- *		don't start from the user defined maximum number of stages
- *		but from the lower IDETAPE_MIN_PIPELINE_STAGES (again, we
- *		will not even allocate this amount of stages if the user
- *		program can't handle the speed). We then implement a feedback
- *		loop which checks if the pipeline is empty, and if it is, we
- *		increase the maximum number of stages as necessary until we
- *		reach the optimum value which just manages to keep the tape
- *		busy with minimum allocated memory or until we reach
- *		IDETAPE_MAX_PIPELINE_STAGES.
- *
- * Concerning (2):
- *
- *	In pipelined write mode, ide-tape can not return accurate error codes
- *	to the user program since we usually just add the request to the
- *      pipeline without waiting for it to be serviced. In case an error
- *      occurs, I will report it on the next user request.
- *
- *	In the pipelined read mode, subsequent read requests or forward
- *	filemark spacing will perform correctly, as we preserve all blocks
- *	and filemarks which we encountered during our excess read-ahead.
- *
- *	For accurate tape positioning and error reporting, disabling
- *	pipelined mode might be the best option.
- *
- * You can enable/disable/tune the pipelined operation mode by adjusting
- * the compile time parameters below.
- *
- *
- *	Possible improvements.
- *
- *	1.	Support for the ATAPI overlap protocol.
- *
- *		In order to maximize bus throughput, we currently use the DSC
- *		overlap method which enables ide.c to service requests from the
- *		other device while the tape is busy executing a command. The
- *		DSC overlap method involves polling the tape's status register
- *		for the DSC bit, and servicing the other device while the tape
- *		isn't ready.
- *
- *		In the current QIC development standard (December 1995),
- *		it is recommended that new tape drives will *in addition*
- *		implement the ATAPI overlap protocol, which is used for the
- *		same purpose - efficient use of the IDE bus, but is interrupt
- *		driven and thus has much less CPU overhead.
- *
- *		ATAPI overlap is likely to be supported in most new ATAPI
- *		devices, including new ATAPI cdroms, and thus provides us
- *		a method by which we can achieve higher throughput when
- *		sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
- */
+IDE ATAPI streaming tape driver.
+
+This driver is a part of the Linux ide driver.
+
+The driver, in co-operation with ide.c, basically traverses the
+request-list for the block device interface. The character device
+interface, on the other hand, creates new requests, adds them
+to the request-list of the block device, and waits for their completion.
+
+The block device major and minor numbers are determined from the
+tape's relative position in the ide interfaces, as explained in ide.c.
+
+The character device interface consists of the following devices:
+
+ht0		major 37, minor 0	first  IDE tape, rewind on close.
+ht1		major 37, minor 1	second IDE tape, rewind on close.
+...
+nht0		major 37, minor 128	first  IDE tape, no rewind on close.
+nht1		major 37, minor 129	second IDE tape, no rewind on close.
+...
+
+The general magnetic tape commands compatible interface, as defined by
+include/linux/mtio.h, is accessible through the character device.
+
+General ide driver configuration options, such as the interrupt-unmask
+flag, can be configured by issuing an ioctl to the block device interface,
+as any other ide device.
+
+Our own ide-tape ioctl's can be issued to either the block device or
+the character device interface.
+
+Maximal throughput with minimal bus load will usually be achieved in the
+following scenario:
+
+     1.	ide-tape is operating in the pipelined operation mode.
+     2.	No buffering is performed by the user backup program.
+
+Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
+
+Here are some words from the first releases of hd.c, which are quoted
+in ide.c and apply here as well:
+
+| Special care is recommended.  Have Fun!
+
+Possible improvements:
+
+1. Support for the ATAPI overlap protocol.
+
+In order to maximize bus throughput, we currently use the DSC
+overlap method which enables ide.c to service requests from the
+other device while the tape is busy executing a command. The
+DSC overlap method involves polling the tape's status register
+for the DSC bit, and servicing the other device while the tape
+isn't ready.
+
+In the current QIC development standard (December 1995),
+it is recommended that new tape drives will *in addition*
+implement the ATAPI overlap protocol, which is used for the
+same purpose - efficient use of the IDE bus, but is interrupt
+driven and thus has much less CPU overhead.
+
+ATAPI overlap is likely to be supported in most new ATAPI
+devices, including new ATAPI cdroms, and thus provides us
+a method by which we can achieve higher throughput when
+sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
diff --git a/Documentation/ide/ide.txt b/Documentation/ide/ide.txt
index 486c699..0c78f4b 100644
--- a/Documentation/ide/ide.txt
+++ b/Documentation/ide/ide.txt
@@ -82,27 +82,26 @@ Drives are normally found by auto-probing and/or examining the CMOS/BIOS data.
 For really weird situations, the apparent (fdisk) geometry can also be specified
 on the kernel "command line" using LILO.  The format of such lines is:
 
-	hdx=cyls,heads,sects
-or	hdx=cdrom
+	ide_core.chs=[interface_number.device_number]:cyls,heads,sects
+or	ide_core.cdrom=[interface_number.device_number]
 
-where hdx can be any of hda through hdh, Three values are required
-(cyls,heads,sects).  For example:
+For example:
 
-	hdc=1050,32,64  hdd=cdrom
+	ide_core.chs=1.0:1050,32,64  ide_core.cdrom=1.1
 
-either {hda,hdb} or {hdc,hdd}.  The results of successful auto-probing may
-override the physical geometry/irq specified, though the "original" geometry
-may be retained as the "logical" geometry for partitioning purposes (fdisk).
+The results of successful auto-probing may override the physical geometry/irq
+specified, though the "original" geometry may be retained as the "logical"
+geometry for partitioning purposes (fdisk).
 
 If the auto-probing during boot time confuses a drive (ie. the drive works
 with hd.c but not with ide.c), then an command line option may be specified
 for each drive for which you'd like the drive to skip the hardware
 probe/identification sequence.  For example:
 
-	hdb=noprobe
+	ide_core.noprobe=0.1
 or
-	hdc=768,16,32
-	hdc=noprobe
+	ide_core.chs=1.0:768,16,32
+	ide_core.noprobe=1.0
 
 Note that when only one IDE device is attached to an interface, it should be
 jumpered as "single" or "master", *not* "slave".  Many folks have had
@@ -118,9 +117,9 @@ If for some reason your cdrom drive is *not* found at boot time, you can force
 the probe to look harder by supplying a kernel command line parameter
 via LILO, such as:
 
-	hdc=cdrom	/* hdc = "master" on second interface */
+	ide_core.cdrom=1.0	/* "master" on second interface (hdc) */
 or
-	hdd=cdrom	/* hdd = "slave" on second interface */
+	ide_core.cdrom=1.1	/* "slave" on second interface (hdd) */
 
 For example, a GW2000 system might have a hard drive on the primary
 interface (/dev/hda) and an IDE cdrom drive on the secondary interface
@@ -174,9 +173,7 @@ to /etc/modprobe.conf.
 
 When ide.c is used as a module, you can pass command line parameters to the
 driver using the "options=" keyword to insmod, while replacing any ',' with
-';'.  For example:
-
-	insmod ide.o options="hda=nodma hdb=nodma"
+';'.
 
 
 ================================================================================
@@ -184,57 +181,6 @@ driver using the "options=" keyword to insmod, while replacing any ',' with
 Summary of ide driver parameters for kernel command line
 --------------------------------------------------------
 
- "hdx="  is recognized for all "x" from "a" to "u", such as "hdc".
-
- "idex=" is recognized for all "x" from "0" to "9", such as "ide1".
-
- "hdx=noprobe"		: drive may be present, but do not probe for it
-
- "hdx=none"		: drive is NOT present, ignore cmos and do not probe
-
- "hdx=nowerr"		: ignore the WRERR_STAT bit on this drive
-
- "hdx=cdrom"		: drive is present, and is a cdrom drive
-
- "hdx=cyl,head,sect"	: disk drive is present, with specified geometry
-
- "hdx=autotune"		: driver will attempt to tune interface speed
-			  to the fastest PIO mode supported,
-			  if possible for this drive only.
-			  Not fully supported by all chipset types,
-			  and quite likely to cause trouble with
-			  older/odd IDE drives.
-
- "hdx=nodma"		: disallow DMA
-
- "idebus=xx"		: inform IDE driver of VESA/PCI bus speed in MHz,
-			  where "xx" is between 20 and 66 inclusive,
-			  used when tuning chipset PIO modes.
-			  For PCI bus, 25 is correct for a P75 system,
-			  30 is correct for P90,P120,P180 systems,
-			  and 33 is used for P100,P133,P166 systems.
-			  If in doubt, use idebus=33 for PCI.
-			  As for VLB, it is safest to not specify it.
-			  Bigger values are safer than smaller ones.
-
- "idex=serialize"	: do not overlap operations on idex. Please note
-			  that you will have to specify this option for
-			  both the respective primary and secondary channel
-			  to take effect.
-
- "idex=reset"		: reset interface after probe
-
- "idex=ata66"		: informs the interface that it has an 80c cable
-			  for chipsets that are ATA-66 capable, but the
-			  ability to bit test for detection is currently
-			  unknown.
-
- "ide=doubler"		: probe/support IDE doublers on Amiga
-
-There may be more options than shown -- use the source, Luke!
-
-Everything else is rejected with a "BAD OPTION" message.
-
 For legacy IDE VLB host drivers (ali14xx/dtc2278/ht6560b/qd65xx/umc8672)
 you need to explicitly enable probing by using "probe" kernel parameter,
 i.e. to enable probing for ALI M14xx chipsets (ali14xx host driver) use:
@@ -251,6 +197,33 @@ are detected automatically).
 You also need to use "probe" kernel parameter for ide-4drives driver
 (support for IDE generic chipset with four drives on one port).
 
+To enable support for IDE doublers on Amiga use "doubler" kernel parameter
+for gayle host driver (i.e. "gayle.doubler" if the driver is built-in).
+
+To force ignoring cable detection (this should be needed only if you're using
+short 40-wires cable which cannot be automatically detected - if this is not
+a case please report it as a bug instead) use "ignore_cable" kernel parameter:
+
+* "ide_core.ignore_cable=[interface_number]" boot option if IDE is built-in
+  (i.e. "ide_core.ignore_cable=1" to force ignoring cable for "ide1")
+
+* "ignore_cable=[interface_number]" module parameter (for ide_core module)
+  if IDE is compiled as module
+
+Other kernel parameters for ide_core are:
+
+* "nodma=[interface_number.device_number]" to disallow DMA for a device
+
+* "noflush=[interface_number.device_number]" to disable flush requests
+
+* "noprobe=[interface_number.device_number]" to skip probing
+
+* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit
+
+* "cdrom=[interface_number.device_number]" to force device as a CD-ROM
+
+* "chs=[interface_number.device_number]" to force device as a disk (using CHS)
+
 ================================================================================
 
 Some Terminology
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index bf6303e..e5f3d91 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -772,10 +772,6 @@ and is between 256 and 4096 characters. It is defined in the file
 			Format: ide=nodma or ide=doubler
 			See Documentation/ide/ide.txt.
 
-	ide?=		[HW] (E)IDE subsystem
-			Format: ide?=ata66 or chipset specific parameters.
-			See Documentation/ide/ide.txt.
-
 	idebus=		[HW] (E)IDE subsystem - VLB/PCI bus speed
 			See Documentation/ide/ide.txt.
 
diff --git a/drivers/ide/arm/bast-ide.c b/drivers/ide/arm/bast-ide.c
index d158f57..713cef2 100644
--- a/drivers/ide/arm/bast-ide.c
+++ b/drivers/ide/arm/bast-ide.c
@@ -35,12 +35,12 @@ static int __init bastide_register(unsigned int base, unsigned int aux, int irq)
 	base += BAST_IDE_CS;
 	aux  += BAST_IDE_CS;
 
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
-		hw.io_ports[i] = (unsigned long)base;
+	for (i = 0; i <= 7; i++) {
+		hw.io_ports_array[i] = (unsigned long)base;
 		base += 0x20;
 	}
 
-	hw.io_ports[IDE_CONTROL_OFFSET] = aux + (6 * 0x20);
+	hw.io_ports.ctl_addr = aux + (6 * 0x20);
 	hw.irq = irq;
 
 	hwif = ide_find_port();
@@ -49,11 +49,7 @@ static int __init bastide_register(unsigned int base, unsigned int aux, int irq)
 
 	i = hwif->index;
 
-	if (hwif->present)
-		ide_unregister(i);
-	else
-		ide_init_port_data(hwif, i);
-
+	ide_init_port_data(hwif, i);
 	ide_init_port_hw(hwif, &hw);
 	hwif->port_ops = NULL;
 
diff --git a/drivers/ide/arm/icside.c b/drivers/ide/arm/icside.c
index 7d642f4..124445c 100644
--- a/drivers/ide/arm/icside.c
+++ b/drivers/ide/arm/icside.c
@@ -426,11 +426,12 @@ icside_setup(void __iomem *base, struct cardinfo *info, struct expansion_card *e
 		 */
 		default_hwif_mmiops(hwif);
 
-		for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
-			hwif->io_ports[i] = port;
+		for (i = 0; i <= 7; i++) {
+			hwif->io_ports_array[i] = port;
 			port += 1 << info->stepping;
 		}
-		hwif->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)base + info->ctrloffset;
+		hwif->io_ports.ctl_addr =
+			(unsigned long)base + info->ctrloffset;
 		hwif->irq     = ec->irq;
 		hwif->chipset = ide_acorn;
 		hwif->gendev.parent = &ec->dev;
@@ -480,8 +481,7 @@ static const struct ide_port_info icside_v6_port_info __initdata = {
 	.init_dma		= icside_dma_off_init,
 	.port_ops		= &icside_v6_no_dma_port_ops,
 	.dma_ops		= &icside_v6_dma_ops,
-	.host_flags		= IDE_HFLAG_SERIALIZE |
-				  IDE_HFLAG_NO_AUTOTUNE,
+	.host_flags		= IDE_HFLAG_SERIALIZE,
 	.mwdma_mask		= ATA_MWDMA2,
 	.swdma_mask		= ATA_SWDMA2,
 };
@@ -547,14 +547,13 @@ icside_register_v6(struct icside_state *state, struct expansion_card *ec)
 	hwif->config_data = (unsigned long)ioc_base;
 	hwif->select_data = sel;
 
-	mate->maskproc    = icside_maskproc;
 	mate->hwif_data   = state;
 	mate->config_data = (unsigned long)ioc_base;
 	mate->select_data = sel | 1;
 
 	if (ec->dma != NO_DMA && !request_dma(ec->dma, hwif->name)) {
 		d.init_dma = icside_dma_init;
-		d.port_ops = &icside_v6_dma_port_ops;
+		d.port_ops = &icside_v6_port_ops;
 		d.dma_ops = NULL;
 	}
 
diff --git a/drivers/ide/arm/palm_bk3710.c b/drivers/ide/arm/palm_bk3710.c
index 8fa34e2..aaf3254 100644
--- a/drivers/ide/arm/palm_bk3710.c
+++ b/drivers/ide/arm/palm_bk3710.c
@@ -321,7 +321,7 @@ static int __devinit palm_bk3710_init_dma(ide_hwif_t *hwif,
 					  const struct ide_port_info *d)
 {
 	unsigned long base =
-		hwif->io_ports[IDE_DATA_OFFSET] - IDE_PALM_ATA_PRI_REG_OFFSET;
+		hwif->io_ports.data_addr - IDE_PALM_ATA_PRI_REG_OFFSET;
 
 	printk(KERN_INFO "    %s: MMIO-DMA\n", hwif->name);
 
@@ -386,8 +386,8 @@ static int __devinit palm_bk3710_probe(struct platform_device *pdev)
 
 	pribase = mem->start + IDE_PALM_ATA_PRI_REG_OFFSET;
 	for (i = 0; i < IDE_NR_PORTS - 2; i++)
-		hw.io_ports[i] = pribase + i;
-	hw.io_ports[IDE_CONTROL_OFFSET] = mem->start +
+		hw.io_ports_array[i] = pribase + i;
+	hw.io_ports.ctl_addr = mem->start +
 			IDE_PALM_ATA_PRI_CTL_OFFSET;
 	hw.irq = irq->start;
 	hw.chipset = ide_palm3710;
@@ -398,11 +398,7 @@ static int __devinit palm_bk3710_probe(struct platform_device *pdev)
 
 	i = hwif->index;
 
-	if (hwif->present)
-		ide_unregister(i);
-	else
-		ide_init_port_data(hwif, i);
-
+	ide_init_port_data(hwif, i);
 	ide_init_port_hw(hwif, &hw);
 
 	hwif->mmio = 1;
diff --git a/drivers/ide/arm/rapide.c b/drivers/ide/arm/rapide.c
index c0581bd..babc1a5 100644
--- a/drivers/ide/arm/rapide.c
+++ b/drivers/ide/arm/rapide.c
@@ -17,11 +17,11 @@ static void rapide_setup_ports(hw_regs_t *hw, void __iomem *base,
 	unsigned long port = (unsigned long)base;
 	int i;
 
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
-		hw->io_ports[i] = port;
+	for (i = 0; i <= 7; i++) {
+		hw->io_ports_array[i] = port;
 		port += sz;
 	}
-	hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
+	hw->io_ports.ctl_addr = (unsigned long)ctrl;
 	hw->irq = irq;
 }
 
@@ -75,7 +75,7 @@ static void __devexit rapide_remove(struct expansion_card *ec)
 
 	ecard_set_drvdata(ec, NULL);
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif);
 
 	ecard_release_resources(ec);
 }
diff --git a/drivers/ide/cris/ide-cris.c b/drivers/ide/cris/ide-cris.c
index a62ca75..9df2685 100644
--- a/drivers/ide/cris/ide-cris.c
+++ b/drivers/ide/cris/ide-cris.c
@@ -88,8 +88,8 @@ enum /* Transfer types */
 int
 cris_ide_ack_intr(ide_hwif_t* hwif)
 {
-	reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2,
-	                         int, hwif->io_ports[0]);
+	reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, int,
+					       hwif->io_ports.data_addr);
 	REG_WR_INT(ata, regi_ata, rw_ack_intr, 1 << ctrl2.sel);
 	return 1;
 }
@@ -231,7 +231,7 @@ cris_ide_start_dma(ide_drive_t *drive, cris_dma_descr_type *d, int dir,int type,
 	ide_hwif_t *hwif = drive->hwif;
 
 	reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, int,
-					       hwif->io_ports[IDE_DATA_OFFSET]);
+					       hwif->io_ports.data_addr);
 	reg_ata_rw_trf_cnt trf_cnt = {0};
 
 	mycontext.saved_data = (dma_descr_data*)virt_to_phys(d);
@@ -271,7 +271,7 @@ static int cris_dma_test_irq(ide_drive_t *drive)
 	int intr = REG_RD_INT(ata, regi_ata, r_intr);
 
 	reg_ata_rw_ctrl2 ctrl2 = REG_TYPE_CONV(reg_ata_rw_ctrl2, int,
-					       hwif->io_ports[IDE_DATA_OFFSET]);
+					       hwif->io_ports.data_addr);
 
 	return intr & (1 << ctrl2.sel) ? 1 : 0;
 }
@@ -531,7 +531,7 @@ static void cris_ide_start_dma(ide_drive_t *drive, cris_dma_descr_type *d, int d
 	*R_ATA_CTRL_DATA =
 		cmd |
 		IO_FIELD(R_ATA_CTRL_DATA, data,
-			 drive->hwif->io_ports[IDE_DATA_OFFSET]) |
+			 drive->hwif->io_ports.data_addr) |
 		IO_STATE(R_ATA_CTRL_DATA, src_dst,  dma)  |
 		IO_STATE(R_ATA_CTRL_DATA, multi,    on)   |
 		IO_STATE(R_ATA_CTRL_DATA, dma_size, word);
@@ -550,7 +550,7 @@ static int cris_dma_test_irq(ide_drive_t *drive)
 {
 	int intr = *R_IRQ_MASK0_RD;
 	int bus = IO_EXTRACT(R_ATA_CTRL_DATA, sel,
-			     drive->hwif->io_ports[IDE_DATA_OFFSET]);
+			     drive->hwif->io_ports.data_addr);
 
 	return intr & (1 << (bus + IO_BITNR(R_IRQ_MASK0_RD, ata_irq0))) ? 1 : 0;
 }
@@ -644,7 +644,7 @@ cris_ide_inw(unsigned long reg) {
 		 * call will also timeout on busy, but as long as the
 		 * write is still performed, everything will be fine.
 		 */
-		if (cris_ide_get_reg(reg) == IDE_STATUS_OFFSET)
+		if (cris_ide_get_reg(reg) == 7)
 			return BUSY_STAT;
 		else
 			/* For other rare cases we assume 0 is good enough.  */
@@ -765,13 +765,13 @@ static void __init cris_setup_ports(hw_regs_t *hw, unsigned long base)
 	memset(hw, 0, sizeof(*hw));
 
 	for (i = 0; i <= 7; i++)
-		hw->io_ports[i] = base + cris_ide_reg_addr(i, 0, 1);
+		hw->io_ports_array[i] = base + cris_ide_reg_addr(i, 0, 1);
 
 	/*
 	 * the IDE control register is at ATA address 6,
 	 * with CS1 active instead of CS0
 	 */
-	hw->io_ports[IDE_CONTROL_OFFSET] = base + cris_ide_reg_addr(6, 1, 0);
+	hw->io_ports.ctl_addr = base + cris_ide_reg_addr(6, 1, 0);
 
 	hw->irq = ide_default_irq(0);
 	hw->ack_intr = cris_ide_ack_intr;
diff --git a/drivers/ide/h8300/ide-h8300.c b/drivers/ide/h8300/ide-h8300.c
index 0708b29..fd23f12 100644
--- a/drivers/ide/h8300/ide-h8300.c
+++ b/drivers/ide/h8300/ide-h8300.c
@@ -63,9 +63,9 @@ static inline void hw_setup(hw_regs_t *hw)
 	int i;
 
 	memset(hw, 0, sizeof(hw_regs_t));
-	for (i = 0; i <= IDE_STATUS_OFFSET; i++)
-		hw->io_ports[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
-	hw->io_ports[IDE_CONTROL_OFFSET] = CONFIG_H8300_IDE_ALT;
+	for (i = 0; i <= 7; i++)
+		hw->io_ports_array[i] = CONFIG_H8300_IDE_BASE + H8300_IDE_GAP*i;
+	hw->io_ports.ctl_addr = CONFIG_H8300_IDE_ALT;
 	hw->irq = EXT_IRQ0 + CONFIG_H8300_IDE_IRQ;
 	hw->chipset = ide_generic;
 }
diff --git a/drivers/ide/ide-acpi.c b/drivers/ide/ide-acpi.c
index e4ad26e..9d3601f 100644
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -60,9 +60,17 @@ struct ide_acpi_hwif_link {
 #define DEBPRINT(fmt, args...)	do {} while (0)
 #endif	/* DEBUGGING */
 
-extern int ide_noacpi;
-extern int ide_noacpitfs;
-extern int ide_noacpionboot;
+int ide_noacpi;
+module_param_named(noacpi, ide_noacpi, bool, 0);
+MODULE_PARM_DESC(noacpi, "disable IDE ACPI support");
+
+int ide_acpigtf;
+module_param_named(acpigtf, ide_acpigtf, bool, 0);
+MODULE_PARM_DESC(acpigtf, "enable IDE ACPI _GTF support");
+
+int ide_acpionboot;
+module_param_named(acpionboot, ide_acpionboot, bool, 0);
+MODULE_PARM_DESC(acpionboot, "call IDE ACPI methods on boot");
 
 static bool ide_noacpi_psx;
 static int no_acpi_psx(const struct dmi_system_id *id)
@@ -376,7 +384,7 @@ static int taskfile_load_raw(ide_drive_t *drive,
 	memcpy(&args.tf_array[7], &gtf->tfa, 7);
 	args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 
-	if (ide_noacpitfs) {
+	if (!ide_acpigtf) {
 		DEBPRINT("_GTF execution disabled\n");
 		return err;
 	}
@@ -721,7 +729,7 @@ void ide_acpi_port_init_devices(ide_hwif_t *hwif)
 				 drive->name, err);
 	}
 
-	if (ide_noacpionboot) {
+	if (!ide_acpionboot) {
 		DEBPRINT("ACPI methods disabled on boot\n");
 		return;
 	}
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index ad98432..b34fd2b 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -560,7 +560,7 @@ static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
 		/* packet command */
 		spin_lock_irqsave(&ide_lock, flags);
 		hwif->OUTBSYNC(drive, WIN_PACKETCMD,
-			       hwif->io_ports[IDE_COMMAND_OFFSET]);
+			       hwif->io_ports.command_addr);
 		ndelay(400);
 		spin_unlock_irqrestore(&ide_lock, flags);
 
@@ -952,9 +952,9 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	}
 
 	/* ok we fall to pio :/ */
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]) & 0x3;
-	lowcyl  = hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
-	highcyl = hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr) & 0x3;
+	lowcyl  = hwif->INB(hwif->io_ports.lbam_addr);
+	highcyl = hwif->INB(hwif->io_ports.lbah_addr);
 
 	len = lowcyl + (256 * highcyl);
 
@@ -1909,9 +1909,7 @@ static int ide_cdrom_setup(ide_drive_t *drive)
 	/* set correct block size */
 	blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
 
-	if (drive->autotune == IDE_TUNE_DEFAULT ||
-	    drive->autotune == IDE_TUNE_AUTO)
-		drive->dsc_overlap = (drive->next != drive);
+	drive->dsc_overlap = (drive->next != drive);
 
 	if (ide_cdrom_register(drive, nslots)) {
 		printk(KERN_ERR "%s: %s failed to register device with the"
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 6e891bc..489079b 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -465,10 +465,10 @@ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
 	}
 
 	/* Get the number of bytes to transfer */
-	bcount = (hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]) << 8) |
-		  hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
+	bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
+		  hwif->INB(hwif->io_ports.lbam_addr);
 	/* on this interrupt */
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 
 	if (ireason & CD) {
 		printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
@@ -539,7 +539,7 @@ static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
 				"initiated yet DRQ isn't asserted\n");
 		return startstop;
 	}
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 	if ((ireason & CD) == 0 || (ireason & IO)) {
 		printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
 				"issuing a packet command\n");
@@ -586,7 +586,7 @@ static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 				"initiated yet DRQ isn't asserted\n");
 		return startstop;
 	}
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 	if ((ireason & CD) == 0 || (ireason & IO)) {
 		printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
 				"while issuing a packet command\n");
@@ -692,7 +692,7 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 		return ide_started;
 	} else {
 		/* Issue the packet command */
-		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports.command_addr);
 		return (*pkt_xfer_routine) (drive);
 	}
 }
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 0fe89a5..3a2d893 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -298,48 +298,43 @@ static void ide_complete_pm_request (ide_drive_t *drive, struct request *rq)
 void ide_tf_read(ide_drive_t *drive, ide_task_t *task)
 {
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
 	struct ide_taskfile *tf = &task->tf;
 
 	if (task->tf_flags & IDE_TFLAG_IN_DATA) {
-		u16 data = hwif->INW(hwif->io_ports[IDE_DATA_OFFSET]);
+		u16 data = hwif->INW(io_ports->data_addr);
 
 		tf->data = data & 0xff;
 		tf->hob_data = (data >> 8) & 0xff;
 	}
 
 	/* be sure we're looking at the low order bits */
-	hwif->OUTB(drive->ctl & ~0x80, hwif->io_ports[IDE_CONTROL_OFFSET]);
+	hwif->OUTB(drive->ctl & ~0x80, io_ports->ctl_addr);
 
 	if (task->tf_flags & IDE_TFLAG_IN_NSECT)
-		tf->nsect  = hwif->INB(hwif->io_ports[IDE_NSECTOR_OFFSET]);
+		tf->nsect  = hwif->INB(io_ports->nsect_addr);
 	if (task->tf_flags & IDE_TFLAG_IN_LBAL)
-		tf->lbal   = hwif->INB(hwif->io_ports[IDE_SECTOR_OFFSET]);
+		tf->lbal   = hwif->INB(io_ports->lbal_addr);
 	if (task->tf_flags & IDE_TFLAG_IN_LBAM)
-		tf->lbam   = hwif->INB(hwif->io_ports[IDE_LCYL_OFFSET]);
+		tf->lbam   = hwif->INB(io_ports->lbam_addr);
 	if (task->tf_flags & IDE_TFLAG_IN_LBAH)
-		tf->lbah   = hwif->INB(hwif->io_ports[IDE_HCYL_OFFSET]);
+		tf->lbah   = hwif->INB(io_ports->lbah_addr);
 	if (task->tf_flags & IDE_TFLAG_IN_DEVICE)
-		tf->device = hwif->INB(hwif->io_ports[IDE_SELECT_OFFSET]);
+		tf->device = hwif->INB(io_ports->device_addr);
 
 	if (task->tf_flags & IDE_TFLAG_LBA48) {
-		hwif->OUTB(drive->ctl | 0x80,
-			   hwif->io_ports[IDE_CONTROL_OFFSET]);
+		hwif->OUTB(drive->ctl | 0x80, io_ports->ctl_addr);
 
 		if (task->tf_flags & IDE_TFLAG_IN_HOB_FEATURE)
-			tf->hob_feature =
-				hwif->INB(hwif->io_ports[IDE_FEATURE_OFFSET]);
+			tf->hob_feature = hwif->INB(io_ports->feature_addr);
 		if (task->tf_flags & IDE_TFLAG_IN_HOB_NSECT)
-			tf->hob_nsect   =
-				hwif->INB(hwif->io_ports[IDE_NSECTOR_OFFSET]);
+			tf->hob_nsect   = hwif->INB(io_ports->nsect_addr);
 		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAL)
-			tf->hob_lbal    =
-				hwif->INB(hwif->io_ports[IDE_SECTOR_OFFSET]);
+			tf->hob_lbal    = hwif->INB(io_ports->lbal_addr);
 		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAM)
-			tf->hob_lbam    =
-				hwif->INB(hwif->io_ports[IDE_LCYL_OFFSET]);
+			tf->hob_lbam    = hwif->INB(io_ports->lbam_addr);
 		if (task->tf_flags & IDE_TFLAG_IN_HOB_LBAH)
-			tf->hob_lbah    =
-				hwif->INB(hwif->io_ports[IDE_HCYL_OFFSET]);
+			tf->hob_lbah    = hwif->INB(io_ports->lbah_addr);
 	}
 }
 
@@ -454,7 +449,7 @@ static ide_startstop_t ide_ata_error(ide_drive_t *drive, struct request *rq, u8
 		if (err == ABRT_ERR) {
 			if (drive->select.b.lba &&
 			    /* some newer drives don't support WIN_SPECIFY */
-			    hwif->INB(hwif->io_ports[IDE_COMMAND_OFFSET]) ==
+			    hwif->INB(hwif->io_ports.command_addr) ==
 				WIN_SPECIFY)
 				return ide_stopped;
 		} else if ((err & BAD_CRC) == BAD_CRC) {
@@ -507,8 +502,7 @@ static ide_startstop_t ide_atapi_error(ide_drive_t *drive, struct request *rq, u
 
 	if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
 		/* force an abort */
-		hwif->OUTB(WIN_IDLEIMMEDIATE,
-			   hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTB(WIN_IDLEIMMEDIATE, hwif->io_ports.command_addr);
 
 	if (rq->errors >= ERROR_MAX) {
 		ide_kill_rq(drive, rq);
@@ -1421,7 +1415,7 @@ static void unexpected_intr (int irq, ide_hwgroup_t *hwgroup)
 	 */
 	do {
 		if (hwif->irq == irq) {
-			stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+			stat = hwif->INB(hwif->io_ports.status_addr);
 			if (!OK_STAT(stat, READY_STAT, BAD_STAT)) {
 				/* Try to not flood the console with msgs */
 				static unsigned long last_msgtime, count;
@@ -1511,7 +1505,7 @@ irqreturn_t ide_intr (int irq, void *dev_id)
 			 * Whack the status register, just in case
 			 * we have a leftover pending IRQ.
 			 */
-			(void) hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+			(void) hwif->INB(hwif->io_ports.status_addr);
 #endif /* CONFIG_BLK_DEV_IDEPCI */
 		}
 		spin_unlock_irqrestore(&ide_lock, flags);
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index 9c646bd..5425d30 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -164,7 +164,7 @@ void SELECT_DRIVE (ide_drive_t *drive)
 	if (port_ops && port_ops->selectproc)
 		port_ops->selectproc(drive);
 
-	hwif->OUTB(drive->select.all, hwif->io_ports[IDE_SELECT_OFFSET]);
+	hwif->OUTB(drive->select.all, hwif->io_ports.device_addr);
 }
 
 void SELECT_MASK (ide_drive_t *drive, int mask)
@@ -194,24 +194,22 @@ static void ata_vlb_sync(ide_drive_t *drive, unsigned long port)
  */
 static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
 {
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 io_32bit		= drive->io_32bit;
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	u8 io_32bit = drive->io_32bit;
 
 	if (io_32bit) {
 		if (io_32bit & 2) {
 			unsigned long flags;
 
 			local_irq_save(flags);
-			ata_vlb_sync(drive, hwif->io_ports[IDE_NSECTOR_OFFSET]);
-			hwif->INSL(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-				   wcount);
+			ata_vlb_sync(drive, io_ports->nsect_addr);
+			hwif->INSL(io_ports->data_addr, buffer, wcount);
 			local_irq_restore(flags);
 		} else
-			hwif->INSL(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-				   wcount);
+			hwif->INSL(io_ports->data_addr, buffer, wcount);
 	} else
-		hwif->INSW(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-			   wcount << 1);
+		hwif->INSW(io_ports->data_addr, buffer, wcount << 1);
 }
 
 /*
@@ -219,24 +217,22 @@ static void ata_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
  */
 static void ata_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
 {
-	ide_hwif_t *hwif	= HWIF(drive);
-	u8 io_32bit		= drive->io_32bit;
+	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	u8 io_32bit = drive->io_32bit;
 
 	if (io_32bit) {
 		if (io_32bit & 2) {
 			unsigned long flags;
 
 			local_irq_save(flags);
-			ata_vlb_sync(drive, hwif->io_ports[IDE_NSECTOR_OFFSET]);
-			hwif->OUTSL(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-				    wcount);
+			ata_vlb_sync(drive, io_ports->nsect_addr);
+			hwif->OUTSL(io_ports->data_addr, buffer, wcount);
 			local_irq_restore(flags);
 		} else
-			hwif->OUTSL(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-				    wcount);
+			hwif->OUTSL(io_ports->data_addr, buffer, wcount);
 	} else
-		hwif->OUTSW(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-			    wcount << 1);
+		hwif->OUTSW(io_ports->data_addr, buffer, wcount << 1);
 }
 
 /*
@@ -255,14 +251,13 @@ static void atapi_input_bytes(ide_drive_t *drive, void *buffer, u32 bytecount)
 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
 	if (MACH_IS_ATARI || MACH_IS_Q40) {
 		/* Atari has a byte-swapped IDE interface */
-		insw_swapw(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-			   bytecount / 2);
+		insw_swapw(hwif->io_ports.data_addr, buffer, bytecount / 2);
 		return;
 	}
 #endif /* CONFIG_ATARI || CONFIG_Q40 */
 	hwif->ata_input_data(drive, buffer, bytecount / 4);
 	if ((bytecount & 0x03) >= 2)
-		hwif->INSW(hwif->io_ports[IDE_DATA_OFFSET],
+		hwif->INSW(hwif->io_ports.data_addr,
 			   (u8 *)buffer + (bytecount & ~0x03), 1);
 }
 
@@ -274,14 +269,13 @@ static void atapi_output_bytes(ide_drive_t *drive, void *buffer, u32 bytecount)
 #if defined(CONFIG_ATARI) || defined(CONFIG_Q40)
 	if (MACH_IS_ATARI || MACH_IS_Q40) {
 		/* Atari has a byte-swapped IDE interface */
-		outsw_swapw(hwif->io_ports[IDE_DATA_OFFSET], buffer,
-			    bytecount / 2);
+		outsw_swapw(hwif->io_ports.data_addr, buffer, bytecount / 2);
 		return;
 	}
 #endif /* CONFIG_ATARI || CONFIG_Q40 */
 	hwif->ata_output_data(drive, buffer, bytecount / 4);
 	if ((bytecount & 0x03) >= 2)
-		hwif->OUTSW(hwif->io_ports[IDE_DATA_OFFSET],
+		hwif->OUTSW(hwif->io_ports.data_addr,
 			    (u8 *)buffer + (bytecount & ~0x03), 1);
 }
 
@@ -445,7 +439,7 @@ int drive_is_ready (ide_drive_t *drive)
 	 * an interrupt with another pci card/device.  We make no assumptions
 	 * about possible isa-pnp and pci-pnp issues yet.
 	 */
-	if (hwif->io_ports[IDE_CONTROL_OFFSET])
+	if (hwif->io_ports.ctl_addr)
 		stat = ide_read_altstatus(drive);
 	else
 		/* Note: this may clear a pending IRQ!! */
@@ -647,7 +641,7 @@ int ide_driveid_update(ide_drive_t *drive)
 	SELECT_MASK(drive, 1);
 	ide_set_irq(drive, 1);
 	msleep(50);
-	hwif->OUTB(WIN_IDENTIFY, hwif->io_ports[IDE_COMMAND_OFFSET]);
+	hwif->OUTB(WIN_IDENTIFY, hwif->io_ports.command_addr);
 	timeout = jiffies + WAIT_WORSTCASE;
 	do {
 		if (time_after(jiffies, timeout)) {
@@ -696,6 +690,7 @@ int ide_driveid_update(ide_drive_t *drive)
 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
 {
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
 	int error = 0;
 	u8 stat;
 
@@ -734,10 +729,9 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
 	SELECT_MASK(drive, 0);
 	udelay(1);
 	ide_set_irq(drive, 0);
-	hwif->OUTB(speed, hwif->io_ports[IDE_NSECTOR_OFFSET]);
-	hwif->OUTB(SETFEATURES_XFER, hwif->io_ports[IDE_FEATURE_OFFSET]);
-	hwif->OUTBSYNC(drive, WIN_SETFEATURES,
-		       hwif->io_ports[IDE_COMMAND_OFFSET]);
+	hwif->OUTB(speed, io_ports->nsect_addr);
+	hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
+	hwif->OUTBSYNC(drive, WIN_SETFEATURES, io_ports->command_addr);
 	if (drive->quirk_list == 2)
 		ide_set_irq(drive, 1);
 
@@ -845,7 +839,7 @@ void ide_execute_command(ide_drive_t *drive, u8 cmd, ide_handler_t *handler,
 
 	spin_lock_irqsave(&ide_lock, flags);
 	__ide_set_handler(drive, handler, timeout, expiry);
-	hwif->OUTBSYNC(drive, cmd, hwif->io_ports[IDE_COMMAND_OFFSET]);
+	hwif->OUTBSYNC(drive, cmd, hwif->io_ports.command_addr);
 	/*
 	 * Drive takes 400nS to respond, we must avoid the IRQ being
 	 * serviced before that.
@@ -1029,6 +1023,7 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 	unsigned long flags;
 	ide_hwif_t *hwif;
 	ide_hwgroup_t *hwgroup;
+	struct ide_io_ports *io_ports;
 	const struct ide_port_ops *port_ops;
 	u8 ctl;
 
@@ -1036,6 +1031,8 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 	hwif = HWIF(drive);
 	hwgroup = HWGROUP(drive);
 
+	io_ports = &hwif->io_ports;
+
 	/* We must not reset with running handlers */
 	BUG_ON(hwgroup->handler != NULL);
 
@@ -1045,8 +1042,7 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 		pre_reset(drive);
 		SELECT_DRIVE(drive);
 		udelay (20);
-		hwif->OUTBSYNC(drive, WIN_SRST,
-			       hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTBSYNC(drive, WIN_SRST, io_ports->command_addr);
 		ndelay(400);
 		hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
 		hwgroup->polling = 1;
@@ -1062,7 +1058,7 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 	for (unit = 0; unit < MAX_DRIVES; ++unit)
 		pre_reset(&hwif->drives[unit]);
 
-	if (hwif->io_ports[IDE_CONTROL_OFFSET] == 0) {
+	if (io_ports->ctl_addr == 0) {
 		spin_unlock_irqrestore(&ide_lock, flags);
 		return ide_stopped;
 	}
@@ -1077,14 +1073,14 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
 	 * recover from reset very quickly, saving us the first 50ms wait time.
 	 */
 	/* set SRST and nIEN */
-	hwif->OUTBSYNC(drive, drive->ctl|6, hwif->io_ports[IDE_CONTROL_OFFSET]);
+	hwif->OUTBSYNC(drive, drive->ctl|6, io_ports->ctl_addr);
 	/* more than enough time */
 	udelay(10);
 	if (drive->quirk_list == 2)
 		ctl = drive->ctl;	/* clear SRST and nIEN */
 	else
 		ctl = drive->ctl | 2;	/* clear SRST, leave nIEN */
-	hwif->OUTBSYNC(drive, ctl, hwif->io_ports[IDE_CONTROL_OFFSET]);
+	hwif->OUTBSYNC(drive, ctl, io_ports->ctl_addr);
 	/* more than enough time */
 	udelay(10);
 	hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
@@ -1129,7 +1125,7 @@ int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
 		 * about locking issues (2.5 work ?).
 		 */
 		mdelay(1);
-		stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+		stat = hwif->INB(hwif->io_ports.status_addr);
 		if ((stat & BUSY_STAT) == 0)
 			return 0;
 		/*
diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
index 10c20e9..6a8953f 100644
--- a/drivers/ide/ide-pnp.c
+++ b/drivers/ide/ide-pnp.c
@@ -82,10 +82,7 @@ static void idepnp_remove(struct pnp_dev *dev)
 {
 	ide_hwif_t *hwif = pnp_get_drvdata(dev);
 
-	if (hwif)
-		ide_unregister(hwif->index);
-	else
-		printk(KERN_ERR "idepnp: Unable to remove device, please report.\n");
+	ide_unregister(hwif);
 
 	release_region(pnp_port_start(dev, 1), 1);
 	release_region(pnp_port_start(dev, 0), 8);
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index a4b65b3..862f026 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -264,6 +264,7 @@ err_misc:
 static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 {
 	ide_hwif_t *hwif = HWIF(drive);
+	struct ide_io_ports *io_ports = &hwif->io_ports;
 	int use_altstatus = 0, rc;
 	unsigned long timeout;
 	u8 s = 0, a = 0;
@@ -271,7 +272,7 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 	/* take a deep breath */
 	msleep(50);
 
-	if (hwif->io_ports[IDE_CONTROL_OFFSET]) {
+	if (io_ports->ctl_addr) {
 		a = ide_read_altstatus(drive);
 		s = ide_read_status(drive);
 		if ((a ^ s) & ~INDEX_STAT)
@@ -289,10 +290,10 @@ static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
 	 */
 	if ((cmd == WIN_PIDENTIFY))
 		/* disable dma & overlap */
-		hwif->OUTB(0, hwif->io_ports[IDE_FEATURE_OFFSET]);
+		hwif->OUTB(0, io_ports->feature_addr);
 
 	/* ask drive for ID */
-	hwif->OUTB(cmd, hwif->io_ports[IDE_COMMAND_OFFSET]);
+	hwif->OUTB(cmd, io_ports->command_addr);
 
 	timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
 	timeout += jiffies;
@@ -353,7 +354,7 @@ static int try_to_identify (ide_drive_t *drive, u8 cmd)
 	 * interrupts during the identify-phase that
 	 * the irq handler isn't expecting.
 	 */
-	if (hwif->io_ports[IDE_CONTROL_OFFSET]) {
+	if (hwif->io_ports.ctl_addr) {
 		if (!hwif->irq) {
 			autoprobe = 1;
 			cookie = probe_irq_on();
@@ -393,7 +394,7 @@ static int ide_busy_sleep(ide_hwif_t *hwif)
 
 	do {
 		msleep(50);
-		stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+		stat = hwif->INB(hwif->io_ports.status_addr);
 		if ((stat & BUSY_STAT) == 0)
 			return 0;
 	} while (time_before(jiffies, timeout));
@@ -425,6 +426,7 @@ static int ide_busy_sleep(ide_hwif_t *hwif)
 static int do_probe (ide_drive_t *drive, u8 cmd)
 {
 	ide_hwif_t *hwif = HWIF(drive);
+	struct ide_io_ports *io_ports = &hwif->io_ports;
 	int rc;
 	u8 stat;
 
@@ -445,7 +447,7 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 	msleep(50);
 	SELECT_DRIVE(drive);
 	msleep(50);
-	if (hwif->INB(hwif->io_ports[IDE_SELECT_OFFSET]) != drive->select.all &&
+	if (hwif->INB(io_ports->device_addr) != drive->select.all &&
 	    !drive->present) {
 		if (drive->select.b.unit != 0) {
 			/* exit with drive0 selected */
@@ -472,17 +474,13 @@ static int do_probe (ide_drive_t *drive, u8 cmd)
 		if (stat == (BUSY_STAT | READY_STAT))
 			return 4;
 
-		if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
-			((drive->autotune == IDE_TUNE_DEFAULT) ||
-			(drive->autotune == IDE_TUNE_AUTO))) {
+		if (rc == 1 && cmd == WIN_PIDENTIFY) {
 			printk(KERN_ERR "%s: no response (status = 0x%02x), "
 					"resetting drive\n", drive->name, stat);
 			msleep(50);
-			hwif->OUTB(drive->select.all,
-				   hwif->io_ports[IDE_SELECT_OFFSET]);
+			hwif->OUTB(drive->select.all, io_ports->device_addr);
 			msleep(50);
-			hwif->OUTB(WIN_SRST,
-				   hwif->io_ports[IDE_COMMAND_OFFSET]);
+			hwif->OUTB(WIN_SRST, io_ports->command_addr);
 			(void)ide_busy_sleep(hwif);
 			rc = try_to_identify(drive, cmd);
 		}
@@ -518,7 +516,7 @@ static void enable_nest (ide_drive_t *drive)
 	printk("%s: enabling %s -- ", hwif->name, drive->id->model);
 	SELECT_DRIVE(drive);
 	msleep(50);
-	hwif->OUTB(EXABYTE_ENABLE_NEST, hwif->io_ports[IDE_COMMAND_OFFSET]);
+	hwif->OUTB(EXABYTE_ENABLE_NEST, hwif->io_ports.command_addr);
 
 	if (ide_busy_sleep(hwif)) {
 		printk(KERN_CONT "failed (timeout)\n");
@@ -800,14 +798,9 @@ static int ide_probe_port(ide_hwif_t *hwif)
 		if (drive->present)
 			rc = 0;
 	}
-	if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
-		printk(KERN_WARNING "%s: reset\n", hwif->name);
-		hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
-		udelay(10);
-		hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
-		(void)ide_busy_sleep(hwif);
-	}
+
 	local_irq_restore(flags);
+
 	/*
 	 * Use cached IRQ number. It might be (and is...) changed by probe
 	 * code above
@@ -834,12 +827,7 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)
 		ide_drive_t *drive = &hwif->drives[unit];
 
 		if (drive->present) {
-			if (drive->autotune == IDE_TUNE_AUTO)
-				ide_set_max_pio(drive);
-
-			if (drive->autotune != IDE_TUNE_DEFAULT &&
-			    drive->autotune != IDE_TUNE_AUTO)
-				continue;
+			ide_set_max_pio(drive);
 
 			drive->nice1 = 1;
 
@@ -994,6 +982,7 @@ static void ide_port_setup_devices(ide_hwif_t *hwif)
  */
 static int init_irq (ide_hwif_t *hwif)
 {
+	struct ide_io_ports *io_ports = &hwif->io_ports;
 	unsigned int index;
 	ide_hwgroup_t *hwgroup;
 	ide_hwif_t *match = NULL;
@@ -1077,9 +1066,9 @@ static int init_irq (ide_hwif_t *hwif)
 		if (IDE_CHIPSET_IS_PCI(hwif->chipset))
 			sa = IRQF_SHARED;
 
-		if (hwif->io_ports[IDE_CONTROL_OFFSET])
+		if (io_ports->ctl_addr)
 			/* clear nIEN */
-			hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
+			hwif->OUTB(0x08, io_ports->ctl_addr);
 
 		if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
 	       		goto out_unlink;
@@ -1095,12 +1084,11 @@ static int init_irq (ide_hwif_t *hwif)
 
 #if !defined(__mc68000__)
 	printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
-		hwif->io_ports[IDE_DATA_OFFSET],
-		hwif->io_ports[IDE_DATA_OFFSET]+7,
-		hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
+		io_ports->data_addr, io_ports->status_addr,
+		io_ports->ctl_addr, hwif->irq);
 #else
 	printk("%s at 0x%08lx on irq %d", hwif->name,
-		hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
+		io_ports->data_addr, hwif->irq);
 #endif /* __mc68000__ */
 	if (match)
 		printk(" (%sed with %s)",
@@ -1242,8 +1230,8 @@ static int hwif_init(ide_hwif_t *hwif)
 	int old_irq;
 
 	if (!hwif->irq) {
-		if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
-		{
+		hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
+		if (!hwif->irq) {
 			printk("%s: DISABLED, NO IRQ\n", hwif->name);
 			return 0;
 		}
@@ -1272,7 +1260,8 @@ static int hwif_init(ide_hwif_t *hwif)
 	 *	It failed to initialise. Find the default IRQ for 
 	 *	this port and try that.
 	 */
-	if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
+	hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
+	if (!hwif->irq) {
 		printk("%s: Disabled unable to get IRQ %d.\n",
 			hwif->name, old_irq);
 		goto out;
@@ -1336,8 +1325,6 @@ static void ide_port_init_devices(ide_hwif_t *hwif)
 			drive->unmask = 1;
 		if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
 			drive->no_unmask = 1;
-		if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0)
-			drive->autotune = 1;
 	}
 
 	if (port_ops && port_ops->port_init_devs)
@@ -1518,13 +1505,20 @@ int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
 	int i, rc = 0;
 
 	for (i = 0; i < MAX_HWIFS; i++) {
-		if (d == NULL || idx[i] == 0xff) {
+		if (idx[i] == 0xff) {
 			mate = NULL;
 			continue;
 		}
 
 		hwif = &ide_hwifs[idx[i]];
 
+		ide_port_apply_params(hwif);
+
+		if (d == NULL) {
+			mate = NULL;
+			continue;
+		}
+
 		if (d->chipset != ide_etrax100 && (i & 1) && mate) {
 			hwif->mate = mate;
 			mate->mate = hwif;
@@ -1621,6 +1615,7 @@ EXPORT_SYMBOL_GPL(ide_device_add);
 
 void ide_port_scan(ide_hwif_t *hwif)
 {
+	ide_port_apply_params(hwif);
 	ide_port_cable_detect(hwif);
 	ide_port_init_devices(hwif);
 
diff --git a/drivers/ide/ide-proc.c b/drivers/ide/ide-proc.c
index d9d98ac..7b2f381 100644
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -786,14 +786,6 @@ void ide_proc_register_port(ide_hwif_t *hwif)
 	}
 }
 
-#ifdef CONFIG_BLK_DEV_IDEPCI
-void ide_pci_create_host_proc(const char *name, get_info_t *get_info)
-{
-	create_proc_info_entry(name, 0, proc_ide_root, get_info);
-}
-EXPORT_SYMBOL_GPL(ide_pci_create_host_proc);
-#endif
-
 void ide_proc_unregister_port(ide_hwif_t *hwif)
 {
 	if (hwif->proc) {
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index d3d8b8d..29870c4 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -72,26 +72,6 @@ enum {
 #endif
 
 /**************************** Tunable parameters *****************************/
-
-
-/*
- * Pipelined mode parameters.
- *
- * We try to use the minimum number of stages which is enough to keep the tape
- * constantly streaming. To accomplish that, we implement a feedback loop around
- * the maximum number of stages:
- *
- * We start from MIN maximum stages (we will not even use MIN stages if we don't
- * need them), increment it by RATE*(MAX-MIN) whenever we sense that the
- * pipeline is empty, until we reach the optimum value or until we reach MAX.
- *
- * Setting the following parameter to 0 is illegal: the pipelined mode cannot be
- * disabled (idetape_calculate_speeds() divides by tape->max_stages.)
- */
-#define IDETAPE_MIN_PIPELINE_STAGES	  1
-#define IDETAPE_MAX_PIPELINE_STAGES	400
-#define IDETAPE_INCREASE_STAGES_RATE	 20
-
 /*
  * After each failed packet command we issue a request sense command and retry
  * the packet command IDETAPE_MAX_PC_RETRIES times.
@@ -224,28 +204,17 @@ enum {
 	/* 0 When the tape position is unknown */
 	IDETAPE_FLAG_ADDRESS_VALID	= (1 <<	1),
 	/* Device already opened */
-	IDETAPE_FLAG_BUSY			= (1 << 2),
-	/* Error detected in a pipeline stage */
-	IDETAPE_FLAG_PIPELINE_ERR	= (1 <<	3),
+	IDETAPE_FLAG_BUSY		= (1 << 2),
 	/* Attempt to auto-detect the current user block size */
-	IDETAPE_FLAG_DETECT_BS		= (1 << 4),
+	IDETAPE_FLAG_DETECT_BS		= (1 << 3),
 	/* Currently on a filemark */
-	IDETAPE_FLAG_FILEMARK		= (1 << 5),
+	IDETAPE_FLAG_FILEMARK		= (1 << 4),
 	/* DRQ interrupt device */
-	IDETAPE_FLAG_DRQ_INTERRUPT	= (1 << 6),
-	/* pipeline active */
-	IDETAPE_FLAG_PIPELINE_ACTIVE	= (1 << 7),
+	IDETAPE_FLAG_DRQ_INTERRUPT	= (1 << 5),
 	/* 0 = no tape is loaded, so we don't rewind after ejecting */
-	IDETAPE_FLAG_MEDIUM_PRESENT	= (1 << 8),
+	IDETAPE_FLAG_MEDIUM_PRESENT	= (1 << 6),
 };
 
-/* A pipeline stage. */
-typedef struct idetape_stage_s {
-	struct request rq;			/* The corresponding request */
-	struct idetape_bh *bh;			/* The data buffers */
-	struct idetape_stage_s *next;		/* Pointer to the next stage */
-} idetape_stage_t;
-
 /*
  * Most of our global data which we need to save even as we leave the driver due
  * to an interrupt or a timer event is stored in the struct defined below.
@@ -289,9 +258,7 @@ typedef struct ide_tape_obj {
 	 * While polling for DSC we use postponed_rq to postpone the current
 	 * request so that ide.c will be able to service pending requests on the
 	 * other device. Note that at most we will have only one DSC (usually
-	 * data transfer) request in the device request queue. Additional
-	 * requests can be queued in our internal pipeline, but they will be
-	 * visible to ide.c only one at a time.
+	 * data transfer) request in the device request queue.
 	 */
 	struct request *postponed_rq;
 	/* The time in which we started polling for DSC */
@@ -331,43 +298,20 @@ typedef struct ide_tape_obj {
 	 * At most, there is only one ide-tape originated data transfer request
 	 * in the device request queue. This allows ide.c to easily service
 	 * requests from the other device when we postpone our active request.
-	 * In the pipelined operation mode, we use our internal pipeline
-	 * structure to hold more data requests. The data buffer size is chosen
-	 * based on the tape's recommendation.
 	 */
-	/* ptr to the request which is waiting in the device request queue */
-	struct request *active_data_rq;
+
 	/* Data buffer size chosen based on the tape's recommendation */
-	int stage_size;
-	idetape_stage_t *merge_stage;
-	int merge_stage_size;
+	int buffer_size;
+	/* merge buffer */
+	struct idetape_bh *merge_bh;
+	/* size of the merge buffer */
+	int merge_bh_size;
+	/* pointer to current buffer head within the merge buffer */
 	struct idetape_bh *bh;
 	char *b_data;
 	int b_count;
 
-	/*
-	 * Pipeline parameters.
-	 *
-	 * To accomplish non-pipelined mode, we simply set the following
-	 * variables to zero (or NULL, where appropriate).
-	 */
-	/* Number of currently used stages */
-	int nr_stages;
-	/* Number of pending stages */
-	int nr_pending_stages;
-	/* We will not allocate more than this number of stages */
-	int max_stages, min_pipeline, max_pipeline;
-	/* The first stage which will be removed from the pipeline */
-	idetape_stage_t *first_stage;
-	/* The currently active stage */
-	idetape_stage_t *active_stage;
-	/* Will be serviced after the currently active request */
-	idetape_stage_t *next_stage;
-	/* New requests will be added to the pipeline here */
-	idetape_stage_t *last_stage;
-	/* Optional free stage which we can use */
-	idetape_stage_t *cache_stage;
-	int pages_per_stage;
+	int pages_per_buffer;
 	/* Wasted space in each stage */
 	int excess_bh_size;
 
@@ -388,45 +332,6 @@ typedef struct ide_tape_obj {
 	/* the tape is write protected (hardware or opened as read-only) */
 	char write_prot;
 
-	/*
-	 * Limit the number of times a request can be postponed, to avoid an
-	 * infinite postpone deadlock.
-	 */
-	int postpone_cnt;
-
-	/*
-	 * Measures number of frames:
-	 *
-	 * 1. written/read to/from the driver pipeline (pipeline_head).
-	 * 2. written/read to/from the tape buffers (idetape_bh).
-	 * 3. written/read by the tape to/from the media (tape_head).
-	 */
-	int pipeline_head;
-	int buffer_head;
-	int tape_head;
-	int last_tape_head;
-
-	/* Speed control at the tape buffers input/output */
-	unsigned long insert_time;
-	int insert_size;
-	int insert_speed;
-	int max_insert_speed;
-	int measure_insert_time;
-
-	/* Speed regulation negative feedback loop */
-	int speed_control;
-	int pipeline_head_speed;
-	int controlled_pipeline_head_speed;
-	int uncontrolled_pipeline_head_speed;
-	int controlled_last_pipeline_head;
-	unsigned long uncontrolled_pipeline_head_time;
-	unsigned long controlled_pipeline_head_time;
-	int controlled_previous_pipeline_head;
-	int uncontrolled_previous_pipeline_head;
-	unsigned long controlled_previous_head_time;
-	unsigned long uncontrolled_previous_head_time;
-	int restart_speed_control_req;
-
 	u32 debug_mask;
 } idetape_tape_t;
 
@@ -674,128 +579,36 @@ static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
 	}
 }
 
-static void idetape_activate_next_stage(ide_drive_t *drive)
+/* Free data buffers completely. */
+static void ide_tape_kfree_buffer(idetape_tape_t *tape)
 {
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_stage_t *stage = tape->next_stage;
-	struct request *rq = &stage->rq;
+	struct idetape_bh *prev_bh, *bh = tape->merge_bh;
 
-	debug_log(DBG_PROCS, "Enter %s\n", __func__);
+	while (bh) {
+		u32 size = bh->b_size;
 
-	if (stage == NULL) {
-		printk(KERN_ERR "ide-tape: bug: Trying to activate a non"
-				" existing stage\n");
-		return;
-	}
+		while (size) {
+			unsigned int order = fls(size >> PAGE_SHIFT)-1;
 
-	rq->rq_disk = tape->disk;
-	rq->buffer = NULL;
-	rq->special = (void *)stage->bh;
-	tape->active_data_rq = rq;
-	tape->active_stage = stage;
-	tape->next_stage = stage->next;
-}
-
-/* Free a stage along with its related buffers completely. */
-static void __idetape_kfree_stage(idetape_stage_t *stage)
-{
-	struct idetape_bh *prev_bh, *bh = stage->bh;
-	int size;
-
-	while (bh != NULL) {
-		if (bh->b_data != NULL) {
-			size = (int) bh->b_size;
-			while (size > 0) {
-				free_page((unsigned long) bh->b_data);
-				size -= PAGE_SIZE;
-				bh->b_data += PAGE_SIZE;
-			}
+			if (bh->b_data)
+				free_pages((unsigned long)bh->b_data, order);
+
+			size &= (order-1);
+			bh->b_data += (1 << order) * PAGE_SIZE;
 		}
 		prev_bh = bh;
 		bh = bh->b_reqnext;
 		kfree(prev_bh);
 	}
-	kfree(stage);
-}
-
-static void idetape_kfree_stage(idetape_tape_t *tape, idetape_stage_t *stage)
-{
-	__idetape_kfree_stage(stage);
-}
-
-/*
- * Remove tape->first_stage from the pipeline. The caller should avoid race
- * conditions.
- */
-static void idetape_remove_stage_head(ide_drive_t *drive)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_stage_t *stage;
-
-	debug_log(DBG_PROCS, "Enter %s\n", __func__);
-
-	if (tape->first_stage == NULL) {
-		printk(KERN_ERR "ide-tape: bug: tape->first_stage is NULL\n");
-		return;
-	}
-	if (tape->active_stage == tape->first_stage) {
-		printk(KERN_ERR "ide-tape: bug: Trying to free our active "
-				"pipeline stage\n");
-		return;
-	}
-	stage = tape->first_stage;
-	tape->first_stage = stage->next;
-	idetape_kfree_stage(tape, stage);
-	tape->nr_stages--;
-	if (tape->first_stage == NULL) {
-		tape->last_stage = NULL;
-		if (tape->next_stage != NULL)
-			printk(KERN_ERR "ide-tape: bug: tape->next_stage !="
-					" NULL\n");
-		if (tape->nr_stages)
-			printk(KERN_ERR "ide-tape: bug: nr_stages should be 0 "
-					"now\n");
-	}
+	kfree(tape->merge_bh);
 }
 
-/*
- * This will free all the pipeline stages starting from new_last_stage->next
- * to the end of the list, and point tape->last_stage to new_last_stage.
- */
-static void idetape_abort_pipeline(ide_drive_t *drive,
-				   idetape_stage_t *new_last_stage)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_stage_t *stage = new_last_stage->next;
-	idetape_stage_t *nstage;
-
-	debug_log(DBG_PROCS, "%s: Enter %s\n", tape->name, __func__);
-
-	while (stage) {
-		nstage = stage->next;
-		idetape_kfree_stage(tape, stage);
-		--tape->nr_stages;
-		--tape->nr_pending_stages;
-		stage = nstage;
-	}
-	if (new_last_stage)
-		new_last_stage->next = NULL;
-	tape->last_stage = new_last_stage;
-	tape->next_stage = NULL;
-}
-
-/*
- * Finish servicing a request and insert a pending pipeline request into the
- * main device queue.
- */
 static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
 {
 	struct request *rq = HWGROUP(drive)->rq;
 	idetape_tape_t *tape = drive->driver_data;
 	unsigned long flags;
 	int error;
-	int remove_stage = 0;
-	idetape_stage_t *active_stage;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
@@ -815,58 +628,8 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
 
 	spin_lock_irqsave(&tape->lock, flags);
 
-	/* The request was a pipelined data transfer request */
-	if (tape->active_data_rq == rq) {
-		active_stage = tape->active_stage;
-		tape->active_stage = NULL;
-		tape->active_data_rq = NULL;
-		tape->nr_pending_stages--;
-		if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
-			remove_stage = 1;
-			if (error) {
-				set_bit(IDETAPE_FLAG_PIPELINE_ERR,
-					&tape->flags);
-				if (error == IDETAPE_ERROR_EOD)
-					idetape_abort_pipeline(drive,
-								active_stage);
-			}
-		} else if (rq->cmd[0] & REQ_IDETAPE_READ) {
-			if (error == IDETAPE_ERROR_EOD) {
-				set_bit(IDETAPE_FLAG_PIPELINE_ERR,
-					&tape->flags);
-				idetape_abort_pipeline(drive, active_stage);
-			}
-		}
-		if (tape->next_stage != NULL) {
-			idetape_activate_next_stage(drive);
-
-			/* Insert the next request into the request queue. */
-			(void)ide_do_drive_cmd(drive, tape->active_data_rq,
-						ide_end);
-		} else if (!error) {
-			/*
-			 * This is a part of the feedback loop which tries to
-			 * find the optimum number of stages. We are starting
-			 * from a minimum maximum number of stages, and if we
-			 * sense that the pipeline is empty, we try to increase
-			 * it, until we reach the user compile time memory
-			 * limit.
-			 */
-			int i = (tape->max_pipeline - tape->min_pipeline) / 10;
-
-			tape->max_stages += max(i, 1);
-			tape->max_stages = max(tape->max_stages,
-						tape->min_pipeline);
-			tape->max_stages = min(tape->max_stages,
-						tape->max_pipeline);
-		}
-	}
 	ide_end_drive_cmd(drive, 0, 0);
 
-	if (remove_stage)
-		idetape_remove_stage_head(drive);
-	if (tape->active_data_rq == NULL)
-		clear_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags);
 	spin_unlock_irqrestore(&tape->lock, flags);
 	return 0;
 }
@@ -1083,10 +846,10 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 		return ide_do_reset(drive);
 	}
 	/* Get the number of bytes to transfer on this interrupt. */
-	bcount = (hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]) << 8) |
-		  hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
+	bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
+		  hwif->INB(hwif->io_ports.lbam_addr);
 
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 
 	if (ireason & CD) {
 		printk(KERN_ERR "ide-tape: CoD != 0 in %s\n", __func__);
@@ -1190,12 +953,12 @@ static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
 				"yet DRQ isn't asserted\n");
 		return startstop;
 	}
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 	while (retries-- && ((ireason & CD) == 0 || (ireason & IO))) {
 		printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while issuing "
 				"a packet command, retrying\n");
 		udelay(100);
-		ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+		ireason = hwif->INB(hwif->io_ports.nsect_addr);
 		if (retries == 0) {
 			printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while "
 					"issuing a packet command, ignoring\n");
@@ -1292,7 +1055,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
 				    IDETAPE_WAIT_CMD, NULL);
 		return ide_started;
 	} else {
-		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports.command_addr);
 		return idetape_transfer_pc(drive);
 	}
 }
@@ -1335,69 +1098,6 @@ static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
 	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static void idetape_calculate_speeds(ide_drive_t *drive)
-{
-	idetape_tape_t *tape = drive->driver_data;
-
-	if (time_after(jiffies,
-			tape->controlled_pipeline_head_time + 120 * HZ)) {
-		tape->controlled_previous_pipeline_head =
-			tape->controlled_last_pipeline_head;
-		tape->controlled_previous_head_time =
-			tape->controlled_pipeline_head_time;
-		tape->controlled_last_pipeline_head = tape->pipeline_head;
-		tape->controlled_pipeline_head_time = jiffies;
-	}
-	if (time_after(jiffies, tape->controlled_pipeline_head_time + 60 * HZ))
-		tape->controlled_pipeline_head_speed = (tape->pipeline_head -
-				tape->controlled_last_pipeline_head) * 32 * HZ /
-				(jiffies - tape->controlled_pipeline_head_time);
-	else if (time_after(jiffies, tape->controlled_previous_head_time))
-		tape->controlled_pipeline_head_speed = (tape->pipeline_head -
-				tape->controlled_previous_pipeline_head) * 32 *
-			HZ / (jiffies - tape->controlled_previous_head_time);
-
-	if (tape->nr_pending_stages < tape->max_stages/*- 1 */) {
-		/* -1 for read mode error recovery */
-		if (time_after(jiffies, tape->uncontrolled_previous_head_time +
-					10 * HZ)) {
-			tape->uncontrolled_pipeline_head_time = jiffies;
-			tape->uncontrolled_pipeline_head_speed =
-				(tape->pipeline_head -
-				 tape->uncontrolled_previous_pipeline_head) *
-				32 * HZ / (jiffies -
-					tape->uncontrolled_previous_head_time);
-		}
-	} else {
-		tape->uncontrolled_previous_head_time = jiffies;
-		tape->uncontrolled_previous_pipeline_head = tape->pipeline_head;
-		if (time_after(jiffies, tape->uncontrolled_pipeline_head_time +
-					30 * HZ))
-			tape->uncontrolled_pipeline_head_time = jiffies;
-
-	}
-	tape->pipeline_head_speed = max(tape->uncontrolled_pipeline_head_speed,
-					tape->controlled_pipeline_head_speed);
-
-	if (tape->speed_control == 1) {
-		if (tape->nr_pending_stages >= tape->max_stages / 2)
-			tape->max_insert_speed = tape->pipeline_head_speed +
-				(1100 - tape->pipeline_head_speed) * 2 *
-				(tape->nr_pending_stages - tape->max_stages / 2)
-				/ tape->max_stages;
-		else
-			tape->max_insert_speed = 500 +
-				(tape->pipeline_head_speed - 500) * 2 *
-				tape->nr_pending_stages / tape->max_stages;
-
-		if (tape->nr_pending_stages >= tape->max_stages * 99 / 100)
-			tape->max_insert_speed = 5000;
-	} else
-		tape->max_insert_speed = tape->speed_control;
-
-	tape->max_insert_speed = max(tape->max_insert_speed, 500);
-}
-
 static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
@@ -1432,17 +1132,7 @@ static ide_startstop_t idetape_rw_callback(ide_drive_t *drive)
 	int blocks = tape->pc->xferred / tape->blk_size;
 
 	tape->avg_size += blocks * tape->blk_size;
-	tape->insert_size += blocks * tape->blk_size;
-	if (tape->insert_size > 1024 * 1024)
-		tape->measure_insert_time = 1;
-	if (tape->measure_insert_time) {
-		tape->measure_insert_time = 0;
-		tape->insert_time = jiffies;
-		tape->insert_size = 0;
-	}
-	if (time_after(jiffies, tape->insert_time))
-		tape->insert_speed = tape->insert_size / 1024 * HZ /
-					(jiffies - tape->insert_time);
+
 	if (time_after_eq(jiffies, tape->avg_time + HZ)) {
 		tape->avg_speed = tape->avg_size * HZ /
 				(jiffies - tape->avg_time) / 1024;
@@ -1475,7 +1165,7 @@ static void idetape_create_read_cmd(idetape_tape_t *tape,
 	pc->buf = NULL;
 	pc->buf_size = length * tape->blk_size;
 	pc->req_xfer = pc->buf_size;
-	if (pc->req_xfer == tape->stage_size)
+	if (pc->req_xfer == tape->buffer_size)
 		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
@@ -1495,7 +1185,7 @@ static void idetape_create_write_cmd(idetape_tape_t *tape,
 	pc->buf = NULL;
 	pc->buf_size = length * tape->blk_size;
 	pc->req_xfer = pc->buf_size;
-	if (pc->req_xfer == tape->stage_size)
+	if (pc->req_xfer == tape->buffer_size)
 		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
@@ -1547,10 +1237,6 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 		drive->post_reset = 0;
 	}
 
-	if (time_after(jiffies, tape->insert_time))
-		tape->insert_speed = tape->insert_size / 1024 * HZ /
-					(jiffies - tape->insert_time);
-	idetape_calculate_speeds(drive);
 	if (!test_and_clear_bit(IDETAPE_FLAG_IGNORE_DSC, &tape->flags) &&
 	    (stat & SEEK_STAT) == 0) {
 		if (postponed_rq == NULL) {
@@ -1574,16 +1260,12 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 		return ide_stopped;
 	}
 	if (rq->cmd[0] & REQ_IDETAPE_READ) {
-		tape->buffer_head++;
-		tape->postpone_cnt = 0;
 		pc = idetape_next_pc_storage(drive);
 		idetape_create_read_cmd(tape, pc, rq->current_nr_sectors,
 					(struct idetape_bh *)rq->special);
 		goto out;
 	}
 	if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
-		tape->buffer_head++;
-		tape->postpone_cnt = 0;
 		pc = idetape_next_pc_storage(drive);
 		idetape_create_write_cmd(tape, pc, rq->current_nr_sectors,
 					 (struct idetape_bh *)rq->special);
@@ -1604,103 +1286,91 @@ out:
 	return idetape_issue_pc(drive, pc);
 }
 
-/* Pipeline related functions */
-
 /*
- * The function below uses __get_free_page to allocate a pipeline stage, along
- * with all the necessary small buffers which together make a buffer of size
- * tape->stage_size (or a bit more). We attempt to combine sequential pages as
+ * The function below uses __get_free_pages to allocate a data buffer of size
+ * tape->buffer_size (or a bit more). We attempt to combine sequential pages as
  * much as possible.
  *
- * It returns a pointer to the new allocated stage, or NULL if we can't (or
- * don't want to) allocate a stage.
- *
- * Pipeline stages are optional and are used to increase performance. If we
- * can't allocate them, we'll manage without them.
+ * It returns a pointer to the newly allocated buffer, or NULL in case of
+ * failure.
  */
-static idetape_stage_t *__idetape_kmalloc_stage(idetape_tape_t *tape, int full,
-						int clear)
+static struct idetape_bh *ide_tape_kmalloc_buffer(idetape_tape_t *tape,
+						  int full, int clear)
 {
-	idetape_stage_t *stage;
-	struct idetape_bh *prev_bh, *bh;
-	int pages = tape->pages_per_stage;
+	struct idetape_bh *prev_bh, *bh, *merge_bh;
+	int pages = tape->pages_per_buffer;
+	unsigned int order, b_allocd;
 	char *b_data = NULL;
 
-	stage = kmalloc(sizeof(idetape_stage_t), GFP_KERNEL);
-	if (!stage)
-		return NULL;
-	stage->next = NULL;
-
-	stage->bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
-	bh = stage->bh;
+	merge_bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+	bh = merge_bh;
 	if (bh == NULL)
 		goto abort;
-	bh->b_reqnext = NULL;
-	bh->b_data = (char *) __get_free_page(GFP_KERNEL);
+
+	order = fls(pages) - 1;
+	bh->b_data = (char *) __get_free_pages(GFP_KERNEL, order);
 	if (!bh->b_data)
 		goto abort;
+	b_allocd = (1 << order) * PAGE_SIZE;
+	pages &= (order-1);
+
 	if (clear)
-		memset(bh->b_data, 0, PAGE_SIZE);
-	bh->b_size = PAGE_SIZE;
+		memset(bh->b_data, 0, b_allocd);
+	bh->b_reqnext = NULL;
+	bh->b_size = b_allocd;
 	atomic_set(&bh->b_count, full ? bh->b_size : 0);
 
-	while (--pages) {
-		b_data = (char *) __get_free_page(GFP_KERNEL);
+	while (pages) {
+		order = fls(pages) - 1;
+		b_data = (char *) __get_free_pages(GFP_KERNEL, order);
 		if (!b_data)
 			goto abort;
+		b_allocd = (1 << order) * PAGE_SIZE;
+
 		if (clear)
-			memset(b_data, 0, PAGE_SIZE);
-		if (bh->b_data == b_data + PAGE_SIZE) {
-			bh->b_size += PAGE_SIZE;
-			bh->b_data -= PAGE_SIZE;
+			memset(b_data, 0, b_allocd);
+
+		/* newly allocated page frames below buffer header or ...*/
+		if (bh->b_data == b_data + b_allocd) {
+			bh->b_size += b_allocd;
+			bh->b_data -= b_allocd;
 			if (full)
-				atomic_add(PAGE_SIZE, &bh->b_count);
+				atomic_add(b_allocd, &bh->b_count);
 			continue;
 		}
+		/* they are above the header */
 		if (b_data == bh->b_data + bh->b_size) {
-			bh->b_size += PAGE_SIZE;
+			bh->b_size += b_allocd;
 			if (full)
-				atomic_add(PAGE_SIZE, &bh->b_count);
+				atomic_add(b_allocd, &bh->b_count);
 			continue;
 		}
 		prev_bh = bh;
 		bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
 		if (!bh) {
-			free_page((unsigned long) b_data);
+			free_pages((unsigned long) b_data, order);
 			goto abort;
 		}
 		bh->b_reqnext = NULL;
 		bh->b_data = b_data;
-		bh->b_size = PAGE_SIZE;
+		bh->b_size = b_allocd;
 		atomic_set(&bh->b_count, full ? bh->b_size : 0);
 		prev_bh->b_reqnext = bh;
+
+		pages &= (order-1);
 	}
+
 	bh->b_size -= tape->excess_bh_size;
 	if (full)
 		atomic_sub(tape->excess_bh_size, &bh->b_count);
-	return stage;
+	return merge_bh;
 abort:
-	__idetape_kfree_stage(stage);
+	ide_tape_kfree_buffer(tape);
 	return NULL;
 }
 
-static idetape_stage_t *idetape_kmalloc_stage(idetape_tape_t *tape)
-{
-	idetape_stage_t *cache_stage = tape->cache_stage;
-
-	debug_log(DBG_PROCS, "Enter %s\n", __func__);
-
-	if (tape->nr_stages >= tape->max_stages)
-		return NULL;
-	if (cache_stage != NULL) {
-		tape->cache_stage = NULL;
-		return cache_stage;
-	}
-	return __idetape_kmalloc_stage(tape, 0, 0);
-}
-
 static int idetape_copy_stage_from_user(idetape_tape_t *tape,
-		idetape_stage_t *stage, const char __user *buf, int n)
+					const char __user *buf, int n)
 {
 	struct idetape_bh *bh = tape->bh;
 	int count;
@@ -1732,7 +1402,7 @@ static int idetape_copy_stage_from_user(idetape_tape_t *tape,
 }
 
 static int idetape_copy_stage_to_user(idetape_tape_t *tape, char __user *buf,
-		idetape_stage_t *stage, int n)
+				      int n)
 {
 	struct idetape_bh *bh = tape->bh;
 	int count;
@@ -1763,11 +1433,11 @@ static int idetape_copy_stage_to_user(idetape_tape_t *tape, char __user *buf,
 	return ret;
 }
 
-static void idetape_init_merge_stage(idetape_tape_t *tape)
+static void idetape_init_merge_buffer(idetape_tape_t *tape)
 {
-	struct idetape_bh *bh = tape->merge_stage->bh;
+	struct idetape_bh *bh = tape->merge_bh;
+	tape->bh = tape->merge_bh;
 
-	tape->bh = bh;
 	if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
 		atomic_set(&bh->b_count, 0);
 	else {
@@ -1776,61 +1446,6 @@ static void idetape_init_merge_stage(idetape_tape_t *tape)
 	}
 }
 
-static void idetape_switch_buffers(idetape_tape_t *tape, idetape_stage_t *stage)
-{
-	struct idetape_bh *tmp;
-
-	tmp = stage->bh;
-	stage->bh = tape->merge_stage->bh;
-	tape->merge_stage->bh = tmp;
-	idetape_init_merge_stage(tape);
-}
-
-/* Add a new stage at the end of the pipeline. */
-static void idetape_add_stage_tail(ide_drive_t *drive, idetape_stage_t *stage)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	unsigned long flags;
-
-	debug_log(DBG_PROCS, "Enter %s\n", __func__);
-
-	spin_lock_irqsave(&tape->lock, flags);
-	stage->next = NULL;
-	if (tape->last_stage != NULL)
-		tape->last_stage->next = stage;
-	else
-		tape->first_stage = stage;
-		tape->next_stage  = stage;
-	tape->last_stage = stage;
-	if (tape->next_stage == NULL)
-		tape->next_stage = tape->last_stage;
-	tape->nr_stages++;
-	tape->nr_pending_stages++;
-	spin_unlock_irqrestore(&tape->lock, flags);
-}
-
-/* Install a completion in a pending request and sleep until it is serviced. The
- * caller should ensure that the request will not be serviced before we install
- * the completion (usually by disabling interrupts).
- */
-static void idetape_wait_for_request(ide_drive_t *drive, struct request *rq)
-{
-	DECLARE_COMPLETION_ONSTACK(wait);
-	idetape_tape_t *tape = drive->driver_data;
-
-	if (rq == NULL || !blk_special_request(rq)) {
-		printk(KERN_ERR "ide-tape: bug: Trying to sleep on non-valid"
-				 " request\n");
-		return;
-	}
-	rq->end_io_data = &wait;
-	rq->end_io = blk_end_sync_rq;
-	spin_unlock_irq(&tape->lock);
-	wait_for_completion(&wait);
-	/* The stage and its struct request have been deallocated */
-	spin_lock_irq(&tape->lock);
-}
-
 static ide_startstop_t idetape_read_position_callback(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
@@ -1899,7 +1514,7 @@ static void idetape_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
  * to the request list without waiting for it to be serviced! In that case, we
  * usually use idetape_queue_pc_head().
  */
-static int __idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
+static int idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 {
 	struct ide_tape_obj *tape = drive->driver_data;
 	struct request rq;
@@ -1931,7 +1546,7 @@ static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
 	timeout += jiffies;
 	while (time_before(jiffies, timeout)) {
 		idetape_create_test_unit_ready_cmd(&pc);
-		if (!__idetape_queue_pc_tail(drive, &pc))
+		if (!idetape_queue_pc_tail(drive, &pc))
 			return 0;
 		if ((tape->sense_key == 2 && tape->asc == 4 && tape->ascq == 2)
 		    || (tape->asc == 0x3A)) {
@@ -1940,7 +1555,7 @@ static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
 				return -ENOMEDIUM;
 			idetape_create_load_unload_cmd(drive, &pc,
 							IDETAPE_LU_LOAD_MASK);
-			__idetape_queue_pc_tail(drive, &pc);
+			idetape_queue_pc_tail(drive, &pc);
 			load_attempted = 1;
 		/* not about to be ready */
 		} else if (!(tape->sense_key == 2 && tape->asc == 4 &&
@@ -1951,11 +1566,6 @@ static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
 	return -EIO;
 }
 
-static int idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
-{
-	return __idetape_queue_pc_tail(drive, pc);
-}
-
 static int idetape_flush_tape_buffers(ide_drive_t *drive)
 {
 	struct ide_atapi_pc pc;
@@ -2021,50 +1631,21 @@ static int idetape_create_prevent_cmd(ide_drive_t *drive,
 	return 1;
 }
 
-static int __idetape_discard_read_pipeline(ide_drive_t *drive)
+static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	unsigned long flags;
-	int cnt;
 
 	if (tape->chrdev_dir != IDETAPE_DIR_READ)
-		return 0;
+		return;
 
-	/* Remove merge stage. */
-	cnt = tape->merge_stage_size / tape->blk_size;
-	if (test_and_clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags))
-		++cnt;		/* Filemarks count as 1 sector */
-	tape->merge_stage_size = 0;
-	if (tape->merge_stage != NULL) {
-		__idetape_kfree_stage(tape->merge_stage);
-		tape->merge_stage = NULL;
+	clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags);
+	tape->merge_bh_size = 0;
+	if (tape->merge_bh != NULL) {
+		ide_tape_kfree_buffer(tape);
+		tape->merge_bh = NULL;
 	}
 
-	/* Clear pipeline flags. */
-	clear_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags);
 	tape->chrdev_dir = IDETAPE_DIR_NONE;
-
-	/* Remove pipeline stages. */
-	if (tape->first_stage == NULL)
-		return 0;
-
-	spin_lock_irqsave(&tape->lock, flags);
-	tape->next_stage = NULL;
-	if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags))
-		idetape_wait_for_request(drive, tape->active_data_rq);
-	spin_unlock_irqrestore(&tape->lock, flags);
-
-	while (tape->first_stage != NULL) {
-		struct request *rq_ptr = &tape->first_stage->rq;
-
-		cnt += rq_ptr->nr_sectors - rq_ptr->current_nr_sectors;
-		if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
-			++cnt;
-		idetape_remove_stage_head(drive);
-	}
-	tape->nr_pending_stages = 0;
-	tape->max_stages = tape->min_pipeline;
-	return cnt;
 }
 
 /*
@@ -2081,7 +1662,7 @@ static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
 	struct ide_atapi_pc pc;
 
 	if (tape->chrdev_dir == IDETAPE_DIR_READ)
-		__idetape_discard_read_pipeline(drive);
+		__ide_tape_discard_merge_buffer(drive);
 	idetape_wait_ready(drive, 60 * 5 * HZ);
 	idetape_create_locate_cmd(drive, &pc, block, partition, skip);
 	retval = idetape_queue_pc_tail(drive, &pc);
@@ -2092,20 +1673,19 @@ static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
 	return (idetape_queue_pc_tail(drive, &pc));
 }
 
-static void idetape_discard_read_pipeline(ide_drive_t *drive,
+static void ide_tape_discard_merge_buffer(ide_drive_t *drive,
 					  int restore_position)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	int cnt;
 	int seek, position;
 
-	cnt = __idetape_discard_read_pipeline(drive);
+	__ide_tape_discard_merge_buffer(drive);
 	if (restore_position) {
 		position = idetape_read_position(drive);
-		seek = position > cnt ? position - cnt : 0;
+		seek = position > 0 ? position : 0;
 		if (idetape_position_tape(drive, seek, 0, 0)) {
 			printk(KERN_INFO "ide-tape: %s: position_tape failed in"
-					 " discard_pipeline()\n", tape->name);
+					 " %s\n", tape->name, __func__);
 			return;
 		}
 	}
@@ -2123,12 +1703,6 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks,
 
 	debug_log(DBG_SENSE, "%s: cmd=%d\n", __func__, cmd);
 
-	if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
-		printk(KERN_ERR "ide-tape: bug: the pipeline is active in %s\n",
-				__func__);
-		return (0);
-	}
-
 	idetape_init_rq(&rq, cmd);
 	rq.rq_disk = tape->disk;
 	rq.special = (void *)bh;
@@ -2140,26 +1714,13 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks,
 	if ((cmd & (REQ_IDETAPE_READ | REQ_IDETAPE_WRITE)) == 0)
 		return 0;
 
-	if (tape->merge_stage)
-		idetape_init_merge_stage(tape);
+	if (tape->merge_bh)
+		idetape_init_merge_buffer(tape);
 	if (rq.errors == IDETAPE_ERROR_GENERAL)
 		return -EIO;
 	return (tape->blk_size * (blocks-rq.current_nr_sectors));
 }
 
-/* start servicing the pipeline stages, starting from tape->next_stage. */
-static void idetape_plug_pipeline(ide_drive_t *drive)
-{
-	idetape_tape_t *tape = drive->driver_data;
-
-	if (tape->next_stage == NULL)
-		return;
-	if (!test_and_set_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
-		idetape_activate_next_stage(drive);
-		(void) ide_do_drive_cmd(drive, tape->active_data_rq, ide_end);
-	}
-}
-
 static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
@@ -2197,137 +1758,39 @@ static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd)
 	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static void idetape_wait_first_stage(ide_drive_t *drive)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	unsigned long flags;
-
-	if (tape->first_stage == NULL)
-		return;
-	spin_lock_irqsave(&tape->lock, flags);
-	if (tape->active_stage == tape->first_stage)
-		idetape_wait_for_request(drive, tape->active_data_rq);
-	spin_unlock_irqrestore(&tape->lock, flags);
-}
-
-/*
- * Try to add a character device originated write request to our pipeline. In
- * case we don't succeed, we revert to non-pipelined operation mode for this
- * request. In order to accomplish that, we
- *
- * 1. Try to allocate a new pipeline stage.
- * 2. If we can't, wait for more and more requests to be serviced and try again
- * each time.
- * 3. If we still can't allocate a stage, fallback to non-pipelined operation
- * mode for this request.
- */
+/* Queue up a character device originated write request. */
 static int idetape_add_chrdev_write_request(ide_drive_t *drive, int blocks)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_stage_t *new_stage;
-	unsigned long flags;
-	struct request *rq;
 
 	debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
 
-	/* Attempt to allocate a new stage. Beware possible race conditions. */
-	while ((new_stage = idetape_kmalloc_stage(tape)) == NULL) {
-		spin_lock_irqsave(&tape->lock, flags);
-		if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
-			idetape_wait_for_request(drive, tape->active_data_rq);
-			spin_unlock_irqrestore(&tape->lock, flags);
-		} else {
-			spin_unlock_irqrestore(&tape->lock, flags);
-			idetape_plug_pipeline(drive);
-			if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE,
-					&tape->flags))
-				continue;
-			/*
-			 * The machine is short on memory. Fallback to non-
-			 * pipelined operation mode for this request.
-			 */
-			return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
-						blocks, tape->merge_stage->bh);
-		}
-	}
-	rq = &new_stage->rq;
-	idetape_init_rq(rq, REQ_IDETAPE_WRITE);
-	/* Doesn't actually matter - We always assume sequential access */
-	rq->sector = tape->first_frame;
-	rq->current_nr_sectors = blocks;
-	rq->nr_sectors = blocks;
-
-	idetape_switch_buffers(tape, new_stage);
-	idetape_add_stage_tail(drive, new_stage);
-	tape->pipeline_head++;
-	idetape_calculate_speeds(drive);
-
-	/*
-	 * Estimate whether the tape has stopped writing by checking if our
-	 * write pipeline is currently empty. If we are not writing anymore,
-	 * wait for the pipeline to be almost completely full (90%) before
-	 * starting to service requests, so that we will be able to keep up with
-	 * the higher speeds of the tape.
-	 */
-	if (!test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
-		if (tape->nr_stages >= tape->max_stages * 9 / 10 ||
-			tape->nr_stages >= tape->max_stages -
-			tape->uncontrolled_pipeline_head_speed * 3 * 1024 /
-			tape->blk_size) {
-			tape->measure_insert_time = 1;
-			tape->insert_time = jiffies;
-			tape->insert_size = 0;
-			tape->insert_speed = 0;
-			idetape_plug_pipeline(drive);
-		}
-	}
-	if (test_and_clear_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags))
-		/* Return a deferred error */
-		return -EIO;
-	return blocks;
+	return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
+				     blocks, tape->merge_bh);
 }
 
-/*
- * Wait until all pending pipeline requests are serviced. Typically called on
- * device close.
- */
-static void idetape_wait_for_pipeline(ide_drive_t *drive)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	unsigned long flags;
-
-	while (tape->next_stage || test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE,
-						&tape->flags)) {
-		idetape_plug_pipeline(drive);
-		spin_lock_irqsave(&tape->lock, flags);
-		if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags))
-			idetape_wait_for_request(drive, tape->active_data_rq);
-		spin_unlock_irqrestore(&tape->lock, flags);
-	}
-}
-
-static void idetape_empty_write_pipeline(ide_drive_t *drive)
+static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	int blocks, min;
 	struct idetape_bh *bh;
 
 	if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
-		printk(KERN_ERR "ide-tape: bug: Trying to empty write pipeline,"
+		printk(KERN_ERR "ide-tape: bug: Trying to empty merge buffer"
 				" but we are not writing.\n");
 		return;
 	}
-	if (tape->merge_stage_size > tape->stage_size) {
+	if (tape->merge_bh_size > tape->buffer_size) {
 		printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
-		tape->merge_stage_size = tape->stage_size;
+		tape->merge_bh_size = tape->buffer_size;
 	}
-	if (tape->merge_stage_size) {
-		blocks = tape->merge_stage_size / tape->blk_size;
-		if (tape->merge_stage_size % tape->blk_size) {
+	if (tape->merge_bh_size) {
+		blocks = tape->merge_bh_size / tape->blk_size;
+		if (tape->merge_bh_size % tape->blk_size) {
 			unsigned int i;
 
 			blocks++;
-			i = tape->blk_size - tape->merge_stage_size %
+			i = tape->blk_size - tape->merge_bh_size %
 				tape->blk_size;
 			bh = tape->bh->b_reqnext;
 			while (bh) {
@@ -2351,74 +1814,33 @@ static void idetape_empty_write_pipeline(ide_drive_t *drive)
 			}
 		}
 		(void) idetape_add_chrdev_write_request(drive, blocks);
-		tape->merge_stage_size = 0;
+		tape->merge_bh_size = 0;
 	}
-	idetape_wait_for_pipeline(drive);
-	if (tape->merge_stage != NULL) {
-		__idetape_kfree_stage(tape->merge_stage);
-		tape->merge_stage = NULL;
+	if (tape->merge_bh != NULL) {
+		ide_tape_kfree_buffer(tape);
+		tape->merge_bh = NULL;
 	}
-	clear_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags);
 	tape->chrdev_dir = IDETAPE_DIR_NONE;
-
-	/*
-	 * On the next backup, perform the feedback loop again. (I don't want to
-	 * keep sense information between backups, as some systems are
-	 * constantly on, and the system load can be totally different on the
-	 * next backup).
-	 */
-	tape->max_stages = tape->min_pipeline;
-	if (tape->first_stage != NULL ||
-	    tape->next_stage != NULL ||
-	    tape->last_stage != NULL ||
-	    tape->nr_stages != 0) {
-		printk(KERN_ERR "ide-tape: ide-tape pipeline bug, "
-			"first_stage %p, next_stage %p, "
-			"last_stage %p, nr_stages %d\n",
-			tape->first_stage, tape->next_stage,
-			tape->last_stage, tape->nr_stages);
-	}
 }
 
-static void idetape_restart_speed_control(ide_drive_t *drive)
+static int idetape_init_read(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-
-	tape->restart_speed_control_req = 0;
-	tape->pipeline_head = 0;
-	tape->controlled_last_pipeline_head = 0;
-	tape->controlled_previous_pipeline_head = 0;
-	tape->uncontrolled_previous_pipeline_head = 0;
-	tape->controlled_pipeline_head_speed = 5000;
-	tape->pipeline_head_speed = 5000;
-	tape->uncontrolled_pipeline_head_speed = 0;
-	tape->controlled_pipeline_head_time =
-		tape->uncontrolled_pipeline_head_time = jiffies;
-	tape->controlled_previous_head_time =
-		tape->uncontrolled_previous_head_time = jiffies;
-}
-
-static int idetape_init_read(ide_drive_t *drive, int max_stages)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_stage_t *new_stage;
-	struct request rq;
 	int bytes_read;
-	u16 blocks = *(u16 *)&tape->caps[12];
 
 	/* Initialize read operation */
 	if (tape->chrdev_dir != IDETAPE_DIR_READ) {
 		if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
-			idetape_empty_write_pipeline(drive);
+			ide_tape_flush_merge_buffer(drive);
 			idetape_flush_tape_buffers(drive);
 		}
-		if (tape->merge_stage || tape->merge_stage_size) {
-			printk(KERN_ERR "ide-tape: merge_stage_size should be"
+		if (tape->merge_bh || tape->merge_bh_size) {
+			printk(KERN_ERR "ide-tape: merge_bh_size should be"
 					 " 0 now\n");
-			tape->merge_stage_size = 0;
+			tape->merge_bh_size = 0;
 		}
-		tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0);
-		if (!tape->merge_stage)
+		tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
+		if (!tape->merge_bh)
 			return -ENOMEM;
 		tape->chrdev_dir = IDETAPE_DIR_READ;
 
@@ -2431,54 +1853,23 @@ static int idetape_init_read(ide_drive_t *drive, int max_stages)
 		if (drive->dsc_overlap) {
 			bytes_read = idetape_queue_rw_tail(drive,
 							REQ_IDETAPE_READ, 0,
-							tape->merge_stage->bh);
+							tape->merge_bh);
 			if (bytes_read < 0) {
-				__idetape_kfree_stage(tape->merge_stage);
-				tape->merge_stage = NULL;
+				ide_tape_kfree_buffer(tape);
+				tape->merge_bh = NULL;
 				tape->chrdev_dir = IDETAPE_DIR_NONE;
 				return bytes_read;
 			}
 		}
 	}
-	if (tape->restart_speed_control_req)
-		idetape_restart_speed_control(drive);
-	idetape_init_rq(&rq, REQ_IDETAPE_READ);
-	rq.sector = tape->first_frame;
-	rq.nr_sectors = blocks;
-	rq.current_nr_sectors = blocks;
-	if (!test_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags) &&
-	    tape->nr_stages < max_stages) {
-		new_stage = idetape_kmalloc_stage(tape);
-		while (new_stage != NULL) {
-			new_stage->rq = rq;
-			idetape_add_stage_tail(drive, new_stage);
-			if (tape->nr_stages >= max_stages)
-				break;
-			new_stage = idetape_kmalloc_stage(tape);
-		}
-	}
-	if (!test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
-		if (tape->nr_pending_stages >= 3 * max_stages / 4) {
-			tape->measure_insert_time = 1;
-			tape->insert_time = jiffies;
-			tape->insert_size = 0;
-			tape->insert_speed = 0;
-			idetape_plug_pipeline(drive);
-		}
-	}
+
 	return 0;
 }
 
-/*
- * Called from idetape_chrdev_read() to service a character device read request
- * and add read-ahead requests to our pipeline.
- */
+/* called from idetape_chrdev_read() to service a chrdev read request. */
 static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	unsigned long flags;
-	struct request *rq_ptr;
-	int bytes_read;
 
 	debug_log(DBG_PROCS, "Enter %s, %d blocks\n", __func__, blocks);
 
@@ -2486,39 +1877,10 @@ static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
 	if (test_bit(IDETAPE_FLAG_FILEMARK, &tape->flags))
 		return 0;
 
-	/* Wait for the next block to reach the head of the pipeline. */
-	idetape_init_read(drive, tape->max_stages);
-	if (tape->first_stage == NULL) {
-		if (test_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags))
-			return 0;
-		return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
-					tape->merge_stage->bh);
-	}
-	idetape_wait_first_stage(drive);
-	rq_ptr = &tape->first_stage->rq;
-	bytes_read = tape->blk_size * (rq_ptr->nr_sectors -
-					rq_ptr->current_nr_sectors);
-	rq_ptr->nr_sectors = 0;
-	rq_ptr->current_nr_sectors = 0;
+	idetape_init_read(drive);
 
-	if (rq_ptr->errors == IDETAPE_ERROR_EOD)
-		return 0;
-	else {
-		idetape_switch_buffers(tape, tape->first_stage);
-		if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
-			set_bit(IDETAPE_FLAG_FILEMARK, &tape->flags);
-		spin_lock_irqsave(&tape->lock, flags);
-		idetape_remove_stage_head(drive);
-		spin_unlock_irqrestore(&tape->lock, flags);
-		tape->pipeline_head++;
-		idetape_calculate_speeds(drive);
-	}
-	if (bytes_read > blocks * tape->blk_size) {
-		printk(KERN_ERR "ide-tape: bug: trying to return more bytes"
-				" than requested\n");
-		bytes_read = blocks * tape->blk_size;
-	}
-	return (bytes_read);
+	return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
+				     tape->merge_bh);
 }
 
 static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
@@ -2530,8 +1892,8 @@ static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
 	while (bcount) {
 		unsigned int count;
 
-		bh = tape->merge_stage->bh;
-		count = min(tape->stage_size, bcount);
+		bh = tape->merge_bh;
+		count = min(tape->buffer_size, bcount);
 		bcount -= count;
 		blocks = count / tape->blk_size;
 		while (count) {
@@ -2542,29 +1904,8 @@ static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
 			bh = bh->b_reqnext;
 		}
 		idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks,
-				      tape->merge_stage->bh);
-	}
-}
-
-static int idetape_pipeline_size(ide_drive_t *drive)
-{
-	idetape_tape_t *tape = drive->driver_data;
-	idetape_stage_t *stage;
-	struct request *rq;
-	int size = 0;
-
-	idetape_wait_for_pipeline(drive);
-	stage = tape->first_stage;
-	while (stage != NULL) {
-		rq = &stage->rq;
-		size += tape->blk_size * (rq->nr_sectors -
-				rq->current_nr_sectors);
-		if (rq->errors == IDETAPE_ERROR_FILEMARK)
-			size += tape->blk_size;
-		stage = stage->next;
+				      tape->merge_bh);
 	}
-	size += tape->merge_stage_size;
-	return size;
 }
 
 /*
@@ -2612,11 +1953,10 @@ static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd,
 		if (copy_from_user(&config, argp, sizeof(config)))
 			return -EFAULT;
 		tape->best_dsc_rw_freq = config.dsc_rw_frequency;
-		tape->max_stages = config.nr_stages;
 		break;
 	case 0x0350:
 		config.dsc_rw_frequency = (int) tape->best_dsc_rw_freq;
-		config.nr_stages = tape->max_stages;
+		config.nr_stages = 1;
 		if (copy_to_user(argp, &config, sizeof(config)))
 			return -EFAULT;
 		break;
@@ -2626,19 +1966,11 @@ static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd,
 	return 0;
 }
 
-/*
- * The function below is now a bit more complicated than just passing the
- * command to the tape since we may have crossed some filemarks during our
- * pipelined read-ahead mode. As a minor side effect, the pipeline enables us to
- * support MTFSFM when the filemark is in our internal pipeline even if the tape
- * doesn't support spacing over filemarks in the reverse direction.
- */
 static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
 					int mt_count)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct ide_atapi_pc pc;
-	unsigned long flags;
 	int retval, count = 0;
 	int sprev = !!(tape->caps[4] & 0x20);
 
@@ -2651,48 +1983,12 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
 	}
 
 	if (tape->chrdev_dir == IDETAPE_DIR_READ) {
-		/* its a read-ahead buffer, scan it for crossed filemarks. */
-		tape->merge_stage_size = 0;
+		tape->merge_bh_size = 0;
 		if (test_and_clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags))
 			++count;
-		while (tape->first_stage != NULL) {
-			if (count == mt_count) {
-				if (mt_op == MTFSFM)
-					set_bit(IDETAPE_FLAG_FILEMARK,
-						&tape->flags);
-				return 0;
-			}
-			spin_lock_irqsave(&tape->lock, flags);
-			if (tape->first_stage == tape->active_stage) {
-				/*
-				 * We have reached the active stage in the read
-				 * pipeline. There is no point in allowing the
-				 * drive to continue reading any farther, so we
-				 * stop the pipeline.
-				 *
-				 * This section should be moved to a separate
-				 * subroutine because similar operations are
-				 * done in __idetape_discard_read_pipeline(),
-				 * for example.
-				 */
-				tape->next_stage = NULL;
-				spin_unlock_irqrestore(&tape->lock, flags);
-				idetape_wait_first_stage(drive);
-				tape->next_stage = tape->first_stage->next;
-			} else
-				spin_unlock_irqrestore(&tape->lock, flags);
-			if (tape->first_stage->rq.errors ==
-					IDETAPE_ERROR_FILEMARK)
-				++count;
-			idetape_remove_stage_head(drive);
-		}
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 	}
 
-	/*
-	 * The filemark was not found in our internal pipeline;	now we can issue
-	 * the space command.
-	 */
 	switch (mt_op) {
 	case MTFSF:
 	case MTBSF:
@@ -2748,27 +2044,25 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
 			    (count % tape->blk_size) == 0)
 				tape->user_bs_factor = count / tape->blk_size;
 	}
-	rc = idetape_init_read(drive, tape->max_stages);
+	rc = idetape_init_read(drive);
 	if (rc < 0)
 		return rc;
 	if (count == 0)
 		return (0);
-	if (tape->merge_stage_size) {
-		actually_read = min((unsigned int)(tape->merge_stage_size),
+	if (tape->merge_bh_size) {
+		actually_read = min((unsigned int)(tape->merge_bh_size),
 				    (unsigned int)count);
-		if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage,
-					       actually_read))
+		if (idetape_copy_stage_to_user(tape, buf, actually_read))
 			ret = -EFAULT;
 		buf += actually_read;
-		tape->merge_stage_size -= actually_read;
+		tape->merge_bh_size -= actually_read;
 		count -= actually_read;
 	}
-	while (count >= tape->stage_size) {
+	while (count >= tape->buffer_size) {
 		bytes_read = idetape_add_chrdev_read_request(drive, ctl);
 		if (bytes_read <= 0)
 			goto finish;
-		if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage,
-					       bytes_read))
+		if (idetape_copy_stage_to_user(tape, buf, bytes_read))
 			ret = -EFAULT;
 		buf += bytes_read;
 		count -= bytes_read;
@@ -2779,11 +2073,10 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
 		if (bytes_read <= 0)
 			goto finish;
 		temp = min((unsigned long)count, (unsigned long)bytes_read);
-		if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage,
-					       temp))
+		if (idetape_copy_stage_to_user(tape, buf, temp))
 			ret = -EFAULT;
 		actually_read += temp;
-		tape->merge_stage_size = bytes_read-temp;
+		tape->merge_bh_size = bytes_read-temp;
 	}
 finish:
 	if (!actually_read && test_bit(IDETAPE_FLAG_FILEMARK, &tape->flags)) {
@@ -2814,17 +2107,17 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
 	/* Initialize write operation */
 	if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
 		if (tape->chrdev_dir == IDETAPE_DIR_READ)
-			idetape_discard_read_pipeline(drive, 1);
-		if (tape->merge_stage || tape->merge_stage_size) {
-			printk(KERN_ERR "ide-tape: merge_stage_size "
+			ide_tape_discard_merge_buffer(drive, 1);
+		if (tape->merge_bh || tape->merge_bh_size) {
+			printk(KERN_ERR "ide-tape: merge_bh_size "
 				"should be 0 now\n");
-			tape->merge_stage_size = 0;
+			tape->merge_bh_size = 0;
 		}
-		tape->merge_stage = __idetape_kmalloc_stage(tape, 0, 0);
-		if (!tape->merge_stage)
+		tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
+		if (!tape->merge_bh)
 			return -ENOMEM;
 		tape->chrdev_dir = IDETAPE_DIR_WRITE;
-		idetape_init_merge_stage(tape);
+		idetape_init_merge_buffer(tape);
 
 		/*
 		 * Issue a write 0 command to ensure that DSC handshake is
@@ -2835,10 +2128,10 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
 		if (drive->dsc_overlap) {
 			ssize_t retval = idetape_queue_rw_tail(drive,
 							REQ_IDETAPE_WRITE, 0,
-							tape->merge_stage->bh);
+							tape->merge_bh);
 			if (retval < 0) {
-				__idetape_kfree_stage(tape->merge_stage);
-				tape->merge_stage = NULL;
+				ide_tape_kfree_buffer(tape);
+				tape->merge_bh = NULL;
 				tape->chrdev_dir = IDETAPE_DIR_NONE;
 				return retval;
 			}
@@ -2846,49 +2139,44 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
 	}
 	if (count == 0)
 		return (0);
-	if (tape->restart_speed_control_req)
-		idetape_restart_speed_control(drive);
-	if (tape->merge_stage_size) {
-		if (tape->merge_stage_size >= tape->stage_size) {
+	if (tape->merge_bh_size) {
+		if (tape->merge_bh_size >= tape->buffer_size) {
 			printk(KERN_ERR "ide-tape: bug: merge buf too big\n");
-			tape->merge_stage_size = 0;
+			tape->merge_bh_size = 0;
 		}
 		actually_written = min((unsigned int)
-				(tape->stage_size - tape->merge_stage_size),
+				(tape->buffer_size - tape->merge_bh_size),
 				(unsigned int)count);
-		if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf,
-						 actually_written))
+		if (idetape_copy_stage_from_user(tape, buf, actually_written))
 				ret = -EFAULT;
 		buf += actually_written;
-		tape->merge_stage_size += actually_written;
+		tape->merge_bh_size += actually_written;
 		count -= actually_written;
 
-		if (tape->merge_stage_size == tape->stage_size) {
+		if (tape->merge_bh_size == tape->buffer_size) {
 			ssize_t retval;
-			tape->merge_stage_size = 0;
+			tape->merge_bh_size = 0;
 			retval = idetape_add_chrdev_write_request(drive, ctl);
 			if (retval <= 0)
 				return (retval);
 		}
 	}
-	while (count >= tape->stage_size) {
+	while (count >= tape->buffer_size) {
 		ssize_t retval;
-		if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf,
-						 tape->stage_size))
+		if (idetape_copy_stage_from_user(tape, buf, tape->buffer_size))
 			ret = -EFAULT;
-		buf += tape->stage_size;
-		count -= tape->stage_size;
+		buf += tape->buffer_size;
+		count -= tape->buffer_size;
 		retval = idetape_add_chrdev_write_request(drive, ctl);
-		actually_written += tape->stage_size;
+		actually_written += tape->buffer_size;
 		if (retval <= 0)
 			return (retval);
 	}
 	if (count) {
 		actually_written += count;
-		if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf,
-						 count))
+		if (idetape_copy_stage_from_user(tape, buf, count))
 			ret = -EFAULT;
-		tape->merge_stage_size += count;
+		tape->merge_bh_size += count;
 	}
 	return ret ? ret : actually_written;
 }
@@ -2912,8 +2200,7 @@ static int idetape_write_filemark(ide_drive_t *drive)
  *
  * Note: MTBSF and MTBSFM are not supported when the tape doesn't support
  * spacing over filemarks in the reverse direction. In this case, MTFSFM is also
- * usually not supported (it is supported in the rare case in which we crossed
- * the filemark during our read-ahead pipelined operation mode).
+ * usually not supported.
  *
  * The following commands are currently not supported:
  *
@@ -2929,7 +2216,6 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 	debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n",
 			mt_op, mt_count);
 
-	/* Commands which need our pipelined read-ahead stages. */
 	switch (mt_op) {
 	case MTFSF:
 	case MTFSFM:
@@ -2946,7 +2232,7 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 	case MTWEOF:
 		if (tape->write_prot)
 			return -EACCES;
-		idetape_discard_read_pipeline(drive, 1);
+		ide_tape_discard_merge_buffer(drive, 1);
 		for (i = 0; i < mt_count; i++) {
 			retval = idetape_write_filemark(drive);
 			if (retval)
@@ -2954,12 +2240,12 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 		}
 		return 0;
 	case MTREW:
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		if (idetape_rewind_tape(drive))
 			return -EIO;
 		return 0;
 	case MTLOAD:
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		idetape_create_load_unload_cmd(drive, &pc,
 					       IDETAPE_LU_LOAD_MASK);
 		return idetape_queue_pc_tail(drive, &pc);
@@ -2974,7 +2260,7 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 				if (!idetape_queue_pc_tail(drive, &pc))
 					tape->door_locked = DOOR_UNLOCKED;
 		}
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		idetape_create_load_unload_cmd(drive, &pc,
 					      !IDETAPE_LU_LOAD_MASK);
 		retval = idetape_queue_pc_tail(drive, &pc);
@@ -2982,10 +2268,10 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 			clear_bit(IDETAPE_FLAG_MEDIUM_PRESENT, &tape->flags);
 		return retval;
 	case MTNOP:
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		return idetape_flush_tape_buffers(drive);
 	case MTRETEN:
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		idetape_create_load_unload_cmd(drive, &pc,
 			IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
 		return idetape_queue_pc_tail(drive, &pc);
@@ -3007,11 +2293,11 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 			set_bit(IDETAPE_FLAG_DETECT_BS, &tape->flags);
 		return 0;
 	case MTSEEK:
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		return idetape_position_tape(drive,
 			mt_count * tape->user_bs_factor, tape->partition, 0);
 	case MTSETPART:
-		idetape_discard_read_pipeline(drive, 0);
+		ide_tape_discard_merge_buffer(drive, 0);
 		return idetape_position_tape(drive, 0, mt_count, 0);
 	case MTFSR:
 	case MTBSR:
@@ -3056,13 +2342,12 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
 
 	debug_log(DBG_CHRDEV, "Enter %s, cmd=%u\n", __func__, cmd);
 
-	tape->restart_speed_control_req = 1;
 	if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
-		idetape_empty_write_pipeline(drive);
+		ide_tape_flush_merge_buffer(drive);
 		idetape_flush_tape_buffers(drive);
 	}
 	if (cmd == MTIOCGET || cmd == MTIOCPOS) {
-		block_offset = idetape_pipeline_size(drive) /
+		block_offset = tape->merge_bh_size /
 			(tape->blk_size * tape->user_bs_factor);
 		position = idetape_read_position(drive);
 		if (position < 0)
@@ -3094,7 +2379,7 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
 		return 0;
 	default:
 		if (tape->chrdev_dir == IDETAPE_DIR_READ)
-			idetape_discard_read_pipeline(drive, 1);
+			ide_tape_discard_merge_buffer(drive, 1);
 		return idetape_blkdev_ioctl(drive, cmd, arg);
 	}
 }
@@ -3168,9 +2453,6 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp)
 	if (!test_bit(IDETAPE_FLAG_ADDRESS_VALID, &tape->flags))
 		(void)idetape_rewind_tape(drive);
 
-	if (tape->chrdev_dir != IDETAPE_DIR_READ)
-		clear_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags);
-
 	/* Read block size and write protect status from drive. */
 	ide_tape_get_bsize_from_bdesc(drive);
 
@@ -3199,8 +2481,6 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp)
 			}
 		}
 	}
-	idetape_restart_speed_control(drive);
-	tape->restart_speed_control_req = 0;
 	return 0;
 
 out_put_tape:
@@ -3212,13 +2492,13 @@ static void idetape_write_release(ide_drive_t *drive, unsigned int minor)
 {
 	idetape_tape_t *tape = drive->driver_data;
 
-	idetape_empty_write_pipeline(drive);
-	tape->merge_stage = __idetape_kmalloc_stage(tape, 1, 0);
-	if (tape->merge_stage != NULL) {
+	ide_tape_flush_merge_buffer(drive);
+	tape->merge_bh = ide_tape_kmalloc_buffer(tape, 1, 0);
+	if (tape->merge_bh != NULL) {
 		idetape_pad_zeros(drive, tape->blk_size *
 				(tape->user_bs_factor - 1));
-		__idetape_kfree_stage(tape->merge_stage);
-		tape->merge_stage = NULL;
+		ide_tape_kfree_buffer(tape);
+		tape->merge_bh = NULL;
 	}
 	idetape_write_filemark(drive);
 	idetape_flush_tape_buffers(drive);
@@ -3241,14 +2521,9 @@ static int idetape_chrdev_release(struct inode *inode, struct file *filp)
 		idetape_write_release(drive, minor);
 	if (tape->chrdev_dir == IDETAPE_DIR_READ) {
 		if (minor < 128)
-			idetape_discard_read_pipeline(drive, 1);
-		else
-			idetape_wait_for_pipeline(drive);
-	}
-	if (tape->cache_stage != NULL) {
-		__idetape_kfree_stage(tape->cache_stage);
-		tape->cache_stage = NULL;
+			ide_tape_discard_merge_buffer(drive, 1);
 	}
+
 	if (minor < 128 && test_bit(IDETAPE_FLAG_MEDIUM_PRESENT, &tape->flags))
 		(void) idetape_rewind_tape(drive);
 	if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
@@ -3385,33 +2660,15 @@ static void idetape_add_settings(ide_drive_t *drive)
 
 	ide_add_setting(drive, "buffer", SETTING_READ, TYPE_SHORT, 0, 0xffff,
 			1, 2, (u16 *)&tape->caps[16], NULL);
-	ide_add_setting(drive, "pipeline_min", SETTING_RW, TYPE_INT, 1, 0xffff,
-			tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
-	ide_add_setting(drive, "pipeline", SETTING_RW, TYPE_INT, 1, 0xffff,
-			tape->stage_size / 1024, 1, &tape->max_stages, NULL);
-	ide_add_setting(drive, "pipeline_max", SETTING_RW, TYPE_INT, 1,	0xffff,
-			tape->stage_size / 1024, 1, &tape->max_pipeline, NULL);
-	ide_add_setting(drive, "pipeline_used",	SETTING_READ, TYPE_INT, 0,
-			0xffff,	tape->stage_size / 1024, 1, &tape->nr_stages,
-			NULL);
-	ide_add_setting(drive, "pipeline_pending", SETTING_READ, TYPE_INT, 0,
-			0xffff, tape->stage_size / 1024, 1,
-			&tape->nr_pending_stages, NULL);
 	ide_add_setting(drive, "speed", SETTING_READ, TYPE_SHORT, 0, 0xffff,
 			1, 1, (u16 *)&tape->caps[14], NULL);
-	ide_add_setting(drive, "stage", SETTING_READ, TYPE_INT,	0, 0xffff, 1,
-			1024, &tape->stage_size, NULL);
+	ide_add_setting(drive, "buffer_size", SETTING_READ, TYPE_INT, 0, 0xffff,
+			1, 1024, &tape->buffer_size, NULL);
 	ide_add_setting(drive, "tdsc", SETTING_RW, TYPE_INT, IDETAPE_DSC_RW_MIN,
 			IDETAPE_DSC_RW_MAX, 1000, HZ, &tape->best_dsc_rw_freq,
 			NULL);
 	ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1,
 			1, &drive->dsc_overlap, NULL);
-	ide_add_setting(drive, "pipeline_head_speed_c", SETTING_READ, TYPE_INT,
-			0, 0xffff, 1, 1, &tape->controlled_pipeline_head_speed,
-			NULL);
-	ide_add_setting(drive, "pipeline_head_speed_u", SETTING_READ, TYPE_INT,
-			0, 0xffff, 1, 1,
-			&tape->uncontrolled_pipeline_head_speed, NULL);
 	ide_add_setting(drive, "avg_speed", SETTING_READ, TYPE_INT, 0, 0xffff,
 			1, 1, &tape->avg_speed, NULL);
 	ide_add_setting(drive, "debug_mask", SETTING_RW, TYPE_INT, 0, 0xffff, 1,
@@ -3434,11 +2691,10 @@ static inline void idetape_add_settings(ide_drive_t *drive) { ; }
  */
 static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
 {
-	unsigned long t1, tmid, tn, t;
+	unsigned long t;
 	int speed;
-	int stage_size;
+	int buffer_size;
 	u8 gcw[2];
-	struct sysinfo si;
 	u16 *ctl = (u16 *)&tape->caps[12];
 
 	spin_lock_init(&tape->lock);
@@ -3457,65 +2713,33 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
 	tape->name[2] = '0' + minor;
 	tape->chrdev_dir = IDETAPE_DIR_NONE;
 	tape->pc = tape->pc_stack;
-	tape->max_insert_speed = 10000;
-	tape->speed_control = 1;
 	*((unsigned short *) &gcw) = drive->id->config;
 
 	/* Command packet DRQ type */
 	if (((gcw[0] & 0x60) >> 5) == 1)
 		set_bit(IDETAPE_FLAG_DRQ_INTERRUPT, &tape->flags);
 
-	tape->min_pipeline = 10;
-	tape->max_pipeline = 10;
-	tape->max_stages   = 10;
-
 	idetape_get_inquiry_results(drive);
 	idetape_get_mode_sense_results(drive);
 	ide_tape_get_bsize_from_bdesc(drive);
 	tape->user_bs_factor = 1;
-	tape->stage_size = *ctl * tape->blk_size;
-	while (tape->stage_size > 0xffff) {
+	tape->buffer_size = *ctl * tape->blk_size;
+	while (tape->buffer_size > 0xffff) {
 		printk(KERN_NOTICE "ide-tape: decreasing stage size\n");
 		*ctl /= 2;
-		tape->stage_size = *ctl * tape->blk_size;
+		tape->buffer_size = *ctl * tape->blk_size;
 	}
-	stage_size = tape->stage_size;
-	tape->pages_per_stage = stage_size / PAGE_SIZE;
-	if (stage_size % PAGE_SIZE) {
-		tape->pages_per_stage++;
-		tape->excess_bh_size = PAGE_SIZE - stage_size % PAGE_SIZE;
+	buffer_size = tape->buffer_size;
+	tape->pages_per_buffer = buffer_size / PAGE_SIZE;
+	if (buffer_size % PAGE_SIZE) {
+		tape->pages_per_buffer++;
+		tape->excess_bh_size = PAGE_SIZE - buffer_size % PAGE_SIZE;
 	}
 
-	/* Select the "best" DSC read/write polling freq and pipeline size. */
+	/* select the "best" DSC read/write polling freq */
 	speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]);
 
-	tape->max_stages = speed * 1000 * 10 / tape->stage_size;
-
-	/* Limit memory use for pipeline to 10% of physical memory */
-	si_meminfo(&si);
-	if (tape->max_stages * tape->stage_size >
-			si.totalram * si.mem_unit / 10)
-		tape->max_stages =
-			si.totalram * si.mem_unit / (10 * tape->stage_size);
-
-	tape->max_stages   = min(tape->max_stages, IDETAPE_MAX_PIPELINE_STAGES);
-	tape->min_pipeline = min(tape->max_stages, IDETAPE_MIN_PIPELINE_STAGES);
-	tape->max_pipeline =
-		min(tape->max_stages * 2, IDETAPE_MAX_PIPELINE_STAGES);
-	if (tape->max_stages == 0) {
-		tape->max_stages   = 1;
-		tape->min_pipeline = 1;
-		tape->max_pipeline = 1;
-	}
-
-	t1 = (tape->stage_size * HZ) / (speed * 1000);
-	tmid = (*(u16 *)&tape->caps[16] * 32 * HZ) / (speed * 125);
-	tn = (IDETAPE_FIFO_THRESHOLD * tape->stage_size * HZ) / (speed * 1000);
-
-	if (tape->max_stages)
-		t = tn;
-	else
-		t = t1;
+	t = (IDETAPE_FIFO_THRESHOLD * tape->buffer_size * HZ) / (speed * 1000);
 
 	/*
 	 * Ensure that the number we got makes sense; limit it within
@@ -3525,11 +2749,10 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
 				min_t(unsigned long, t, IDETAPE_DSC_RW_MAX),
 				IDETAPE_DSC_RW_MIN);
 	printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
-		"%dkB pipeline, %lums tDSC%s\n",
+		"%lums tDSC%s\n",
 		drive->name, tape->name, *(u16 *)&tape->caps[14],
-		(*(u16 *)&tape->caps[16] * 512) / tape->stage_size,
-		tape->stage_size / 1024,
-		tape->max_stages * tape->stage_size / 1024,
+		(*(u16 *)&tape->caps[16] * 512) / tape->buffer_size,
+		tape->buffer_size / 1024,
 		tape->best_dsc_rw_freq * 1000 / HZ,
 		drive->using_dma ? ", DMA":"");
 
@@ -3553,7 +2776,7 @@ static void ide_tape_release(struct kref *kref)
 	ide_drive_t *drive = tape->drive;
 	struct gendisk *g = tape->disk;
 
-	BUG_ON(tape->first_stage != NULL || tape->merge_stage_size);
+	BUG_ON(tape->merge_bh_size);
 
 	drive->dsc_overlap = 0;
 	drive->driver_data = NULL;
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index a317ca9..9f9ad9f 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -36,6 +36,7 @@
 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
 {
 	ide_hwif_t *hwif = drive->hwif;
+	struct ide_io_ports *io_ports = &hwif->io_ports;
 	struct ide_taskfile *tf = &task->tf;
 	u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
 
@@ -59,34 +60,33 @@ void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
 		SELECT_MASK(drive, 0);
 
 	if (task->tf_flags & IDE_TFLAG_OUT_DATA)
-		hwif->OUTW((tf->hob_data << 8) | tf->data,
-			   hwif->io_ports[IDE_DATA_OFFSET]);
+		hwif->OUTW((tf->hob_data << 8) | tf->data, io_ports->data_addr);
 
 	if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
-		hwif->OUTB(tf->hob_feature, hwif->io_ports[IDE_FEATURE_OFFSET]);
+		hwif->OUTB(tf->hob_feature, io_ports->feature_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
-		hwif->OUTB(tf->hob_nsect, hwif->io_ports[IDE_NSECTOR_OFFSET]);
+		hwif->OUTB(tf->hob_nsect, io_ports->nsect_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
-		hwif->OUTB(tf->hob_lbal, hwif->io_ports[IDE_SECTOR_OFFSET]);
+		hwif->OUTB(tf->hob_lbal, io_ports->lbal_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
-		hwif->OUTB(tf->hob_lbam, hwif->io_ports[IDE_LCYL_OFFSET]);
+		hwif->OUTB(tf->hob_lbam, io_ports->lbam_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
-		hwif->OUTB(tf->hob_lbah, hwif->io_ports[IDE_HCYL_OFFSET]);
+		hwif->OUTB(tf->hob_lbah, io_ports->lbah_addr);
 
 	if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
-		hwif->OUTB(tf->feature, hwif->io_ports[IDE_FEATURE_OFFSET]);
+		hwif->OUTB(tf->feature, io_ports->feature_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
-		hwif->OUTB(tf->nsect, hwif->io_ports[IDE_NSECTOR_OFFSET]);
+		hwif->OUTB(tf->nsect, io_ports->nsect_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
-		hwif->OUTB(tf->lbal, hwif->io_ports[IDE_SECTOR_OFFSET]);
+		hwif->OUTB(tf->lbal, io_ports->lbal_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
-		hwif->OUTB(tf->lbam, hwif->io_ports[IDE_LCYL_OFFSET]);
+		hwif->OUTB(tf->lbam, io_ports->lbam_addr);
 	if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
-		hwif->OUTB(tf->lbah, hwif->io_ports[IDE_HCYL_OFFSET]);
+		hwif->OUTB(tf->lbah, io_ports->lbah_addr);
 
 	if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
 		hwif->OUTB((tf->device & HIHI) | drive->select.all,
-			   hwif->io_ports[IDE_SELECT_OFFSET]);
+			   io_ports->device_addr);
 }
 
 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
@@ -155,8 +155,7 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 	switch (task->data_phase) {
 	case TASKFILE_MULTI_OUT:
 	case TASKFILE_OUT:
-		hwif->OUTBSYNC(drive, tf->command,
-			       hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTBSYNC(drive, tf->command, hwif->io_ports.command_addr);
 		ndelay(400);	/* FIXME */
 		return pre_task_out_intr(drive, task->rq);
 	case TASKFILE_MULTI_IN:
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index bced02f..999584c 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -94,12 +94,6 @@ DEFINE_MUTEX(ide_cfg_mtx);
 
 int noautodma = 0;
 
-#ifdef CONFIG_BLK_DEV_IDEACPI
-int ide_noacpi = 0;
-int ide_noacpitfs = 1;
-int ide_noacpionboot = 1;
-#endif
-
 ide_hwif_t ide_hwifs[MAX_HWIFS];	/* master data repository */
 
 static void ide_port_init_devices_data(ide_hwif_t *);
@@ -293,7 +287,7 @@ EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 
 /**
  *	ide_unregister		-	free an IDE interface
- *	@index: index of interface (will change soon to a pointer)
+ *	@hwif: IDE interface
  *
  *	Perform the final unregister of an IDE interface. At the moment
  *	we don't refcount interfaces so this will also get split up.
@@ -313,19 +307,16 @@ EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
  *	This is raving bonkers.
  */
 
-void ide_unregister(unsigned int index)
+void ide_unregister(ide_hwif_t *hwif)
 {
-	ide_hwif_t *hwif, *g;
+	ide_hwif_t *g;
 	ide_hwgroup_t *hwgroup;
 	int irq_count = 0;
 
-	BUG_ON(index >= MAX_HWIFS);
-
 	BUG_ON(in_interrupt());
 	BUG_ON(irqs_disabled());
 	mutex_lock(&ide_cfg_mtx);
 	spin_lock_irq(&ide_lock);
-	hwif = &ide_hwifs[index];
 	if (!hwif->present)
 		goto abort;
 	__ide_port_unregister_devices(hwif);
@@ -366,7 +357,7 @@ void ide_unregister(unsigned int index)
 		ide_release_dma_engine(hwif);
 
 	/* restore hwif data to pristine status */
-	ide_init_port_data(hwif, index);
+	ide_init_port_data(hwif, hwif->index);
 
 abort:
 	spin_unlock_irq(&ide_lock);
@@ -377,7 +368,7 @@ EXPORT_SYMBOL(ide_unregister);
 
 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
 {
-	memcpy(hwif->io_ports, hw->io_ports, sizeof(hwif->io_ports));
+	memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
 	hwif->irq = hw->irq;
 	hwif->chipset = hw->chipset;
 	hwif->gendev.parent = hw->dev;
@@ -837,16 +828,6 @@ static int __init match_parm (char *s, const char *keywords[], int vals[], int m
 	return 0;	/* zero = nothing matched */
 }
 
-extern int probe_ali14xx;
-extern int probe_umc8672;
-extern int probe_dtc2278;
-extern int probe_ht6560b;
-extern int probe_qd65xx;
-extern int cmd640_vlb;
-extern int probe_4drives;
-
-static int __initdata is_chipset_set;
-
 /*
  * ide_setup() gets called VERY EARLY during initialization,
  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
@@ -855,14 +836,12 @@ static int __initdata is_chipset_set;
  */
 static int __init ide_setup(char *s)
 {
-	int i, vals[3];
 	ide_hwif_t *hwif;
 	ide_drive_t *drive;
 	unsigned int hw, unit;
+	int vals[3];
 	const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
-	const char max_hwif  = '0' + (MAX_HWIFS - 1);
 
-	
 	if (strncmp(s,"hd",2) == 0 && s[2] == '=')	/* hd= is for hd.c   */
 		return 0;				/* driver and not us */
 
@@ -878,7 +857,7 @@ static int __init ide_setup(char *s)
 
 		printk(" : Enabled support for IDE doublers\n");
 		ide_doubler = 1;
-		return 1;
+		goto obsolete_option;
 	}
 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 
@@ -892,17 +871,17 @@ static int __init ide_setup(char *s)
 	if (!strcmp(s, "ide=noacpi")) {
 		//printk(" : Disable IDE ACPI support.\n");
 		ide_noacpi = 1;
-		return 1;
+		goto obsolete_option;
 	}
 	if (!strcmp(s, "ide=acpigtf")) {
 		//printk(" : Enable IDE ACPI _GTF support.\n");
-		ide_noacpitfs = 0;
-		return 1;
+		ide_acpigtf = 1;
+		goto obsolete_option;
 	}
 	if (!strcmp(s, "ide=acpionboot")) {
 		//printk(" : Call IDE ACPI methods on boot.\n");
-		ide_noacpionboot = 0;
-		return 1;
+		ide_acpionboot = 1;
+		goto obsolete_option;
 	}
 #endif /* CONFIG_BLK_DEV_IDEACPI */
 
@@ -912,7 +891,7 @@ static int __init ide_setup(char *s)
 	if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
 		const char *hd_words[] = {
 			"none", "noprobe", "nowerr", "cdrom", "nodma",
-			"autotune", "noautotune", "-8", "-9", "-10",
+			"-6", "-7", "-8", "-9", "-10",
 			"noflush", "remap", "remap63", "scsi", NULL };
 		unit = s[2] - 'a';
 		hw   = unit / MAX_DRIVES;
@@ -927,28 +906,22 @@ static int __init ide_setup(char *s)
 			case -1: /* "none" */
 			case -2: /* "noprobe" */
 				drive->noprobe = 1;
-				goto done;
+				goto obsolete_option;
 			case -3: /* "nowerr" */
 				drive->bad_wstat = BAD_R_STAT;
-				goto done;
+				goto obsolete_option;
 			case -4: /* "cdrom" */
 				drive->present = 1;
 				drive->media = ide_cdrom;
 				/* an ATAPI device ignores DRDY */
 				drive->ready_stat = 0;
-				goto done;
+				goto obsolete_option;
 			case -5: /* nodma */
 				drive->nodma = 1;
-				goto done;
-			case -6: /* "autotune" */
-				drive->autotune = IDE_TUNE_AUTO;
-				goto obsolete_option;
-			case -7: /* "noautotune" */
-				drive->autotune = IDE_TUNE_NOAUTO;
 				goto obsolete_option;
 			case -11: /* noflush */
 				drive->noflush = 1;
-				goto done;
+				goto obsolete_option;
 			case -12: /* "remap" */
 				drive->remap_0_to_1 = 1;
 				goto obsolete_option;
@@ -966,7 +939,7 @@ static int __init ide_setup(char *s)
 				drive->sect	= drive->bios_sect = vals[2];
 				drive->present	= 1;
 				drive->forced_geom = 1;
-				goto done;
+				goto obsolete_option;
 			default:
 				goto bad_option;
 		}
@@ -984,126 +957,15 @@ static int __init ide_setup(char *s)
 			idebus_parameter = vals[0];
 		} else
 			printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
-		goto done;
+		goto obsolete_option;
 	}
-	/*
-	 * Look for interface options:  "idex="
-	 */
-	if (s[3] >= '0' && s[3] <= max_hwif) {
-		/*
-		 * Be VERY CAREFUL changing this: note hardcoded indexes below
-		 * (-8, -9, -10) are reserved to ease the hardcoding.
-		 */
-		static const char *ide_words[] = {
-			"minus1", "serialize", "minus3", "minus4",
-			"reset", "minus6", "ata66", "minus8", "minus9",
-			"minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb",
-			"dtc2278", "umc8672", "ali14xx", NULL };
-
-		hw = s[3] - '0';
-		hwif = &ide_hwifs[hw];
-		i = match_parm(&s[4], ide_words, vals, 3);
-
-		/*
-		 * Cryptic check to ensure chipset not already set for hwif.
-		 * Note: we can't depend on hwif->chipset here.
-		 */
-		if (i >= -18 && i <= -11) {
-			/* chipset already specified */
-			if (is_chipset_set)
-				goto bad_option;
-			/* these drivers are for "ide0=" only */
-			if (hw != 0)
-				goto bad_hwif;
-			is_chipset_set = 1;
-			printk("\n");
-		}
-
-		switch (i) {
-#ifdef CONFIG_BLK_DEV_ALI14XX
-			case -17: /* "ali14xx" */
-				probe_ali14xx = 1;
-				goto obsolete_option;
-#endif
-#ifdef CONFIG_BLK_DEV_UMC8672
-			case -16: /* "umc8672" */
-				probe_umc8672 = 1;
-				goto obsolete_option;
-#endif
-#ifdef CONFIG_BLK_DEV_DTC2278
-			case -15: /* "dtc2278" */
-				probe_dtc2278 = 1;
-				goto obsolete_option;
-#endif
-#ifdef CONFIG_BLK_DEV_CMD640
-			case -14: /* "cmd640_vlb" */
-				cmd640_vlb = 1;
-				goto obsolete_option;
-#endif
-#ifdef CONFIG_BLK_DEV_HT6560B
-			case -13: /* "ht6560b" */
-				probe_ht6560b = 1;
-				goto obsolete_option;
-#endif
-#ifdef CONFIG_BLK_DEV_QD65XX
-			case -12: /* "qd65xx" */
-				probe_qd65xx = 1;
-				goto obsolete_option;
-#endif
-#ifdef CONFIG_BLK_DEV_4DRIVES
-			case -11: /* "four" drives on one set of ports */
-				probe_4drives = 1;
-				goto obsolete_option;
-#endif
-			case -10: /* minus10 */
-			case -9: /* minus9 */
-			case -8: /* minus8 */
-			case -6:
-			case -4:
-			case -3:
-				goto bad_option;
-			case -7: /* ata66 */
-#ifdef CONFIG_BLK_DEV_IDEPCI
-				/*
-				 * Use ATA_CBL_PATA40_SHORT so drive side
-				 * cable detection is also overriden.
-				 */
-				hwif->cbl = ATA_CBL_PATA40_SHORT;
-				goto obsolete_option;
-#else
-				goto bad_hwif;
-#endif
-			case -5: /* "reset" */
-				hwif->reset = 1;
-				goto obsolete_option;
-			case -2: /* "serialize" */
-				hwif->mate = &ide_hwifs[hw^1];
-				hwif->mate->mate = hwif;
-				hwif->serialized = hwif->mate->serialized = 1;
-				goto obsolete_option;
 
-			case -1:
-			case 0:
-			case 1:
-			case 2:
-			case 3:
-				goto bad_option;
-			default:
-				printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n");
-				return 1;
-		}
-	}
 bad_option:
 	printk(" -- BAD OPTION\n");
 	return 1;
 obsolete_option:
 	printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
 	return 1;
-bad_hwif:
-	printk("-- NOT SUPPORTED ON ide%d", hw);
-done:
-	printk("\n");
-	return 1;
 }
 
 EXPORT_SYMBOL(ide_lock);
@@ -1239,6 +1101,185 @@ static void ide_port_class_release(struct device *portdev)
 	put_device(&hwif->gendev);
 }
 
+int ide_vlb_clk;
+EXPORT_SYMBOL_GPL(ide_vlb_clk);
+
+module_param_named(vlb_clock, ide_vlb_clk, int, 0);
+MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
+
+int ide_pci_clk;
+EXPORT_SYMBOL_GPL(ide_pci_clk);
+
+module_param_named(pci_clock, ide_pci_clk, int, 0);
+MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
+
+static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
+{
+	int a, b, i, j = 1;
+	unsigned int *dev_param_mask = (unsigned int *)kp->arg;
+
+	if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
+	    sscanf(s, "%d.%d", &a, &b) != 2)
+		return -EINVAL;
+
+	i = a * MAX_DRIVES + b;
+
+	if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
+		return -EINVAL;
+
+	if (j)
+		*dev_param_mask |= (1 << i);
+	else
+		*dev_param_mask &= (1 << i);
+
+	return 0;
+}
+
+static unsigned int ide_nodma;
+
+module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
+MODULE_PARM_DESC(nodma, "disallow DMA for a device");
+
+static unsigned int ide_noflush;
+
+module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
+MODULE_PARM_DESC(noflush, "disable flush requests for a device");
+
+static unsigned int ide_noprobe;
+
+module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
+MODULE_PARM_DESC(noprobe, "skip probing for a device");
+
+static unsigned int ide_nowerr;
+
+module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
+MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
+
+static unsigned int ide_cdroms;
+
+module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
+MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
+
+struct chs_geom {
+	unsigned int	cyl;
+	u8		head;
+	u8		sect;
+};
+
+static unsigned int ide_disks;
+static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
+
+static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
+{
+	int a, b, c = 0, h = 0, s = 0, i, j = 1;
+
+	if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
+	    sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
+		return -EINVAL;
+
+	i = a * MAX_DRIVES + b;
+
+	if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
+		return -EINVAL;
+
+	if (c > INT_MAX || h > 255 || s > 255)
+		return -EINVAL;
+
+	if (j)
+		ide_disks |= (1 << i);
+	else
+		ide_disks &= (1 << i);
+
+	ide_disks_chs[i].cyl  = c;
+	ide_disks_chs[i].head = h;
+	ide_disks_chs[i].sect = s;
+
+	return 0;
+}
+
+module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
+MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
+
+static void ide_dev_apply_params(ide_drive_t *drive)
+{
+	int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
+
+	if (ide_nodma & (1 << i)) {
+		printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
+		drive->nodma = 1;
+	}
+	if (ide_noflush & (1 << i)) {
+		printk(KERN_INFO "ide: disabling flush requests for %s\n",
+				 drive->name);
+		drive->noflush = 1;
+	}
+	if (ide_noprobe & (1 << i)) {
+		printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
+		drive->noprobe = 1;
+	}
+	if (ide_nowerr & (1 << i)) {
+		printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
+				 drive->name);
+		drive->bad_wstat = BAD_R_STAT;
+	}
+	if (ide_cdroms & (1 << i)) {
+		printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
+		drive->present = 1;
+		drive->media = ide_cdrom;
+		/* an ATAPI device ignores DRDY */
+		drive->ready_stat = 0;
+	}
+	if (ide_disks & (1 << i)) {
+		drive->cyl  = drive->bios_cyl  = ide_disks_chs[i].cyl;
+		drive->head = drive->bios_head = ide_disks_chs[i].head;
+		drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
+		drive->forced_geom = 1;
+		printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
+				 drive->name,
+				 drive->cyl, drive->head, drive->sect);
+		drive->present = 1;
+		drive->media = ide_disk;
+		drive->ready_stat = READY_STAT;
+	}
+}
+
+static unsigned int ide_ignore_cable;
+
+static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
+{
+	int i, j = 1;
+
+	if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
+		return -EINVAL;
+
+	if (i >= MAX_HWIFS || j < 0 || j > 1)
+		return -EINVAL;
+
+	if (j)
+		ide_ignore_cable |= (1 << i);
+	else
+		ide_ignore_cable &= (1 << i);
+
+	return 0;
+}
+
+module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
+MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
+
+void ide_port_apply_params(ide_hwif_t *hwif)
+{
+	int i;
+
+	if (ide_ignore_cable & (1 << hwif->index)) {
+		printk(KERN_INFO "ide: ignoring cable detection for %s\n",
+				 hwif->name);
+		hwif->cbl = ATA_CBL_PATA40_SHORT;
+	}
+
+	for (i = 0; i < MAX_DRIVES; i++)
+		ide_dev_apply_params(&hwif->drives[i]);
+}
+
 /*
  * This is gets invoked once during initialization, to set *everything* up
  */
@@ -1305,11 +1346,6 @@ int __init init_module (void)
 
 void __exit cleanup_module (void)
 {
-	int index;
-
-	for (index = 0; index < MAX_HWIFS; ++index)
-		ide_unregister(index);
-
 	proc_ide_destroy();
 
 	class_destroy(ide_port_class);
diff --git a/drivers/ide/legacy/ali14xx.c b/drivers/ide/legacy/ali14xx.c
index 6efbf94..90c65cf 100644
--- a/drivers/ide/legacy/ali14xx.c
+++ b/drivers/ide/legacy/ali14xx.c
@@ -116,7 +116,7 @@ static void ali14xx_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	int time1, time2;
 	u8 param1, param2, param3, param4;
 	unsigned long flags;
-	int bus_speed = system_bus_clock();
+	int bus_speed = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
 
 	/* calculate timing, according to PIO mode */
 	time1 = ide_pio_cycle_time(drive, pio);
@@ -202,7 +202,7 @@ static const struct ide_port_info ali14xx_port_info = {
 	.name			= DRV_NAME,
 	.chipset		= ide_ali14xx,
 	.port_ops		= &ali14xx_port_ops,
-	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
+	.host_flags		= IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 
@@ -220,7 +220,7 @@ static int __init ali14xx_probe(void)
 	return ide_legacy_device_add(&ali14xx_port_info, 0);
 }
 
-int probe_ali14xx;
+static int probe_ali14xx;
 
 module_param_named(probe, probe_ali14xx, bool, 0);
 MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets");
diff --git a/drivers/ide/legacy/buddha.c b/drivers/ide/legacy/buddha.c
index f51433b..5c730e4 100644
--- a/drivers/ide/legacy/buddha.c
+++ b/drivers/ide/legacy/buddha.c
@@ -102,7 +102,7 @@ static int buddha_ack_intr(ide_hwif_t *hwif)
 {
     unsigned char ch;
 
-    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
+    ch = z_readb(hwif->io_ports.irq_addr);
     if (!(ch & 0x80))
 	    return 0;
     return 1;
@@ -112,9 +112,9 @@ static int xsurf_ack_intr(ide_hwif_t *hwif)
 {
     unsigned char ch;
 
-    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
+    ch = z_readb(hwif->io_ports.irq_addr);
     /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
-    z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]); 
+    z_writeb(0, hwif->io_ports.irq_addr);
     if (!(ch & 0x80))
 	    return 0;
     return 1;
@@ -128,13 +128,13 @@ static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
 
 	memset(hw, 0, sizeof(*hw));
 
-	hw->io_ports[IDE_DATA_OFFSET] = base;
+	hw->io_ports.data_addr = base;
 
 	for (i = 1; i < 8; i++)
-		hw->io_ports[i] = base + 2 + i * 4;
+		hw->io_ports_array[i] = base + 2 + i * 4;
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
-	hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
+	hw->io_ports.ctl_addr = ctl;
+	hw->io_ports.irq_addr = irq_port;
 
 	hw->irq = IRQ_AMIGA_PORTS;
 	hw->ack_intr = ack_intr;
diff --git a/drivers/ide/legacy/dtc2278.c b/drivers/ide/legacy/dtc2278.c
index f7c4ad1..af791a0 100644
--- a/drivers/ide/legacy/dtc2278.c
+++ b/drivers/ide/legacy/dtc2278.c
@@ -101,8 +101,7 @@ static const struct ide_port_info dtc2278_port_info __initdata = {
 				  IDE_HFLAG_IO_32BIT |
 				  /* disallow ->io_32bit changes */
 				  IDE_HFLAG_NO_IO_32BIT |
-				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE,
+				  IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 
@@ -131,7 +130,7 @@ static int __init dtc2278_probe(void)
 	return ide_legacy_device_add(&dtc2278_port_info, 0);
 }
 
-int probe_dtc2278 = 0;
+static int probe_dtc2278;
 
 module_param_named(probe, probe_dtc2278, bool, 0);
 MODULE_PARM_DESC(probe, "probe for DTC2278xx chipsets");
diff --git a/drivers/ide/legacy/falconide.c b/drivers/ide/legacy/falconide.c
index 5c19c42..56cdaa0 100644
--- a/drivers/ide/legacy/falconide.c
+++ b/drivers/ide/legacy/falconide.c
@@ -50,12 +50,12 @@ static void __init falconide_setup_ports(hw_regs_t *hw)
 
 	memset(hw, 0, sizeof(*hw));
 
-	hw->io_ports[IDE_DATA_OFFSET] = ATA_HD_BASE;
+	hw->io_ports.data_addr = ATA_HD_BASE;
 
 	for (i = 1; i < 8; i++)
-		hw->io_ports[i] = ATA_HD_BASE + 1 + i * 4;
+		hw->io_ports_array[i] = ATA_HD_BASE + 1 + i * 4;
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = ATA_HD_BASE + ATA_HD_CONTROL;
+	hw->io_ports.ctl_addr = ATA_HD_BASE + ATA_HD_CONTROL;
 
 	hw->irq = IRQ_MFP_IDE;
 	hw->ack_intr = NULL;
diff --git a/drivers/ide/legacy/gayle.c b/drivers/ide/legacy/gayle.c
index a0c9601..a9c2593 100644
--- a/drivers/ide/legacy/gayle.c
+++ b/drivers/ide/legacy/gayle.c
@@ -63,6 +63,8 @@
 #define GAYLE_HAS_CONTROL_REG	(!ide_doubler)
 #define GAYLE_IDEREG_SIZE	(ide_doubler ? 0x1000 : 0x2000)
 int ide_doubler = 0;	/* support IDE doublers? */
+module_param_named(doubler, ide_doubler, bool, 0);
+MODULE_PARM_DESC(doubler, "enable support for IDE doublers");
 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
 
 
@@ -74,7 +76,7 @@ static int gayle_ack_intr_a4000(ide_hwif_t *hwif)
 {
     unsigned char ch;
 
-    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
+    ch = z_readb(hwif->io_ports.irq_addr);
     if (!(ch & GAYLE_IRQ_IDE))
 	return 0;
     return 1;
@@ -84,11 +86,11 @@ static int gayle_ack_intr_a1200(ide_hwif_t *hwif)
 {
     unsigned char ch;
 
-    ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
+    ch = z_readb(hwif->io_ports.irq_addr);
     if (!(ch & GAYLE_IRQ_IDE))
 	return 0;
-    (void)z_readb(hwif->io_ports[IDE_STATUS_OFFSET]);
-    z_writeb(0x7c, hwif->io_ports[IDE_IRQ_OFFSET]);
+    (void)z_readb(hwif->io_ports.status_addr);
+    z_writeb(0x7c, hwif->io_ports.irq_addr);
     return 1;
 }
 
@@ -100,13 +102,13 @@ static void __init gayle_setup_ports(hw_regs_t *hw, unsigned long base,
 
 	memset(hw, 0, sizeof(*hw));
 
-	hw->io_ports[IDE_DATA_OFFSET] = base;
+	hw->io_ports.data_addr = base;
 
 	for (i = 1; i < 8; i++)
-		hw->io_ports[i] = base + 2 + i * 4;
+		hw->io_ports_array[i] = base + 2 + i * 4;
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
-	hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
+	hw->io_ports.ctl_addr = ctl;
+	hw->io_ports.irq_addr = irq_port;
 
 	hw->irq = IRQ_AMIGA_PORTS;
 	hw->ack_intr = ack_intr;
diff --git a/drivers/ide/legacy/ht6560b.c b/drivers/ide/legacy/ht6560b.c
index 702d8de..4fe516d 100644
--- a/drivers/ide/legacy/ht6560b.c
+++ b/drivers/ide/legacy/ht6560b.c
@@ -157,8 +157,8 @@ static void ht6560b_selectproc (ide_drive_t *drive)
 		/*
 		 * Set timing for this drive:
 		 */
-		outb(timing, hwif->io_ports[IDE_SELECT_OFFSET]);
-		(void)inb(hwif->io_ports[IDE_STATUS_OFFSET]);
+		outb(timing, hwif->io_ports.device_addr);
+		(void)inb(hwif->io_ports.status_addr);
 #ifdef DEBUG
 		printk("ht6560b: %s: select=%#x timing=%#x\n",
 			drive->name, select, timing);
@@ -212,8 +212,8 @@ static u8 ht_pio2timings(ide_drive_t *drive, const u8 pio)
 {
 	int active_time, recovery_time;
 	int active_cycles, recovery_cycles;
-	int bus_speed = system_bus_clock();
-	
+	int bus_speed = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
+
         if (pio) {
 		unsigned int cycle_time;
 
@@ -323,7 +323,7 @@ static void __init ht6560b_port_init_devs(ide_hwif_t *hwif)
 	hwif->drives[1].drive_data = t;
 }
 
-int probe_ht6560b = 0;
+static int probe_ht6560b;
 
 module_param_named(probe, probe_ht6560b, bool, 0);
 MODULE_PARM_DESC(probe, "probe for HT6560B chipset");
@@ -340,7 +340,6 @@ static const struct ide_port_info ht6560b_port_info __initdata = {
 	.port_ops		= &ht6560b_port_ops,
 	.host_flags		= IDE_HFLAG_SERIALIZE | /* is this needed? */
 				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE |
 				  IDE_HFLAG_ABUSE_PREFETCH,
 	.pio_mask		= ATA_PIO4,
 };
diff --git a/drivers/ide/legacy/ide-4drives.c b/drivers/ide/legacy/ide-4drives.c
index 17f94d0..ecae916 100644
--- a/drivers/ide/legacy/ide-4drives.c
+++ b/drivers/ide/legacy/ide-4drives.c
@@ -6,7 +6,7 @@
 
 #define DRV_NAME "ide-4drives"
 
-int probe_4drives;
+static int probe_4drives;
 
 module_param_named(probe, probe_4drives, bool, 0);
 MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
diff --git a/drivers/ide/legacy/ide-cs.c b/drivers/ide/legacy/ide-cs.c
index 855e157..aa2ea3d 100644
--- a/drivers/ide/legacy/ide-cs.c
+++ b/drivers/ide/legacy/ide-cs.c
@@ -140,8 +140,8 @@ static void ide_detach(struct pcmcia_device *link)
 
     ide_release(link);
 
-    release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1);
-    release_region(hwif->io_ports[IDE_DATA_OFFSET], 8);
+    release_region(hwif->io_ports.ctl_addr, 1);
+    release_region(hwif->io_ports.data_addr, 8);
 
     kfree(info);
 } /* ide_detach */
@@ -183,11 +183,7 @@ static ide_hwif_t *idecs_register(unsigned long io, unsigned long ctl,
 
     i = hwif->index;
 
-    if (hwif->present)
-	ide_unregister(i);
-    else
-	ide_init_port_data(hwif, i);
-
+    ide_init_port_data(hwif, i);
     ide_init_port_hw(hwif, &hw);
     hwif->port_ops = &idecs_port_ops;
 
@@ -390,7 +386,7 @@ void ide_release(struct pcmcia_device *link)
     if (info->ndev) {
 	/* FIXME: if this fails we need to queue the cleanup somehow
 	   -- need to investigate the required PCMCIA magic */
-	ide_unregister(hwif->index);
+	ide_unregister(hwif);
     }
     info->ndev = 0;
 
diff --git a/drivers/ide/legacy/ide_platform.c b/drivers/ide/legacy/ide_platform.c
index 822f48b..8279dc7 100644
--- a/drivers/ide/legacy/ide_platform.c
+++ b/drivers/ide/legacy/ide_platform.c
@@ -30,14 +30,14 @@ static void __devinit plat_ide_setup_ports(hw_regs_t *hw,
 	unsigned long port = (unsigned long)base;
 	int i;
 
-	hw->io_ports[IDE_DATA_OFFSET] = port;
+	hw->io_ports.data_addr = port;
 
 	port += (1 << pdata->ioport_shift);
-	for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET;
+	for (i = 1; i <= 7;
 	     i++, port += (1 << pdata->ioport_shift))
-		hw->io_ports[i] = port;
+		hw->io_ports_array[i] = port;
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;
+	hw->io_ports.ctl_addr = (unsigned long)ctrl;
 
 	hw->irq = irq;
 
@@ -120,7 +120,7 @@ static int __devexit plat_ide_remove(struct platform_device *pdev)
 {
 	ide_hwif_t *hwif = pdev->dev.driver_data;
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif);
 
 	return 0;
 }
diff --git a/drivers/ide/legacy/macide.c b/drivers/ide/legacy/macide.c
index 26546d0..1f527bb 100644
--- a/drivers/ide/legacy/macide.c
+++ b/drivers/ide/legacy/macide.c
@@ -72,9 +72,9 @@ static void __init macide_setup_ports(hw_regs_t *hw, unsigned long base,
 	memset(hw, 0, sizeof(*hw));
 
 	for (i = 0; i < 8; i++)
-		hw->io_ports[i] = base + i * 4;
+		hw->io_ports_array[i] = base + i * 4;
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = base + IDE_CONTROL;
+	hw->io_ports.ctl_addr = base + IDE_CONTROL;
 
 	hw->irq = irq;
 	hw->ack_intr = ack_intr;
diff --git a/drivers/ide/legacy/q40ide.c b/drivers/ide/legacy/q40ide.c
index f23999d..a3573d4 100644
--- a/drivers/ide/legacy/q40ide.c
+++ b/drivers/ide/legacy/q40ide.c
@@ -80,10 +80,10 @@ void q40_ide_setup_ports ( hw_regs_t *hw,
 	for (i = 0; i < IDE_NR_PORTS; i++) {
 		/* BIG FAT WARNING: 
 		   assumption: only DATA port is ever used in 16 bit mode */
-		if ( i==0 )
-			hw->io_ports[i] = Q40_ISA_IO_W(base + offsets[i]);
+		if (i == 0)
+			hw->io_ports_array[i] = Q40_ISA_IO_W(base + offsets[i]);
 		else
-			hw->io_ports[i] = Q40_ISA_IO_B(base + offsets[i]);
+			hw->io_ports_array[i] = Q40_ISA_IO_B(base + offsets[i]);
 	}
 
 	hw->irq = irq;
diff --git a/drivers/ide/legacy/qd65xx.c b/drivers/ide/legacy/qd65xx.c
index 15a99aa..6424af1 100644
--- a/drivers/ide/legacy/qd65xx.c
+++ b/drivers/ide/legacy/qd65xx.c
@@ -11,11 +11,7 @@
  *
  * QDI QD6500/QD6580 EIDE controller fast support
  *
- * Please set local bus speed using kernel parameter idebus
- * 	for example, "idebus=33" stands for 33Mhz VLbus
  * To activate controller support, use "ide0=qd65xx"
- * To enable tuning, use "hda=autotune hdb=autotune"
- * To enable 2nd channel tuning (qd6580 only), use "hdc=autotune hdd=autotune"
  */
 
 /*
@@ -114,17 +110,18 @@ static void qd65xx_select(ide_drive_t *drive)
 
 static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
 {
-	u8 active_cycle,recovery_cycle;
+	int clk = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
+	u8 act_cyc, rec_cyc;
 
-	if (system_bus_clock()<=33) {
-		active_cycle =   9  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 9);
-		recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
+	if (clk <= 33) {
+		act_cyc =  9 - IDE_IN(active_time   * clk / 1000 + 1, 2,  9);
+		rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 0, 15);
 	} else {
-		active_cycle =   8  - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 1, 8);
-		recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
+		act_cyc =  8 - IDE_IN(active_time   * clk / 1000 + 1, 1,  8);
+		rec_cyc = 18 - IDE_IN(recovery_time * clk / 1000 + 1, 3, 18);
 	}
 
-	return((recovery_cycle<<4) | 0x08 | active_cycle);
+	return (rec_cyc << 4) | 0x08 | act_cyc;
 }
 
 /*
@@ -135,10 +132,13 @@ static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery
 
 static u8 qd6580_compute_timing (int active_time, int recovery_time)
 {
-	u8 active_cycle   = 17 - IDE_IN(active_time   * system_bus_clock() / 1000 + 1, 2, 17);
-	u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
+	int clk = ide_vlb_clk ? ide_vlb_clk : system_bus_clock();
+	u8 act_cyc, rec_cyc;
 
-	return((recovery_cycle<<4) | active_cycle);
+	act_cyc = 17 - IDE_IN(active_time   * clk / 1000 + 1, 2, 17);
+	rec_cyc = 15 - IDE_IN(recovery_time * clk / 1000 + 1, 2, 15);
+
+	return (rec_cyc << 4) | act_cyc;
 }
 
 /*
@@ -322,8 +322,7 @@ static const struct ide_port_info qd65xx_port_info __initdata = {
 	.name			= DRV_NAME,
 	.chipset		= ide_qd65xx,
 	.host_flags		= IDE_HFLAG_IO_32BIT |
-				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE,
+				  IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 
@@ -399,7 +398,7 @@ static int __init qd_probe(int base)
 	return rc;
 }
 
-int probe_qd65xx = 0;
+static int probe_qd65xx;
 
 module_param_named(probe, probe_qd65xx, bool, 0);
 MODULE_PARM_DESC(probe, "probe for QD65xx chipsets");
diff --git a/drivers/ide/legacy/umc8672.c b/drivers/ide/legacy/umc8672.c
index 17d5153..b54a14a 100644
--- a/drivers/ide/legacy/umc8672.c
+++ b/drivers/ide/legacy/umc8672.c
@@ -130,7 +130,7 @@ static const struct ide_port_info umc8672_port_info __initdata = {
 	.name			= DRV_NAME,
 	.chipset		= ide_umc8672,
 	.port_ops		= &umc8672_port_ops,
-	.host_flags		= IDE_HFLAG_NO_DMA | IDE_HFLAG_NO_AUTOTUNE,
+	.host_flags		= IDE_HFLAG_NO_DMA,
 	.pio_mask		= ATA_PIO4,
 };
 
@@ -158,7 +158,7 @@ static int __init umc8672_probe(void)
 	return ide_legacy_device_add(&umc8672_port_info, 0);
 }
 
-int probe_umc8672;
+static int probe_umc8672;
 
 module_param_named(probe, probe_umc8672, bool, 0);
 MODULE_PARM_DESC(probe, "probe for UMC8672 chipset");
diff --git a/drivers/ide/mips/au1xxx-ide.c b/drivers/ide/mips/au1xxx-ide.c
index 3485a31..296b9c6 100644
--- a/drivers/ide/mips/au1xxx-ide.c
+++ b/drivers/ide/mips/au1xxx-ide.c
@@ -502,12 +502,11 @@ static int auide_ddma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
 static void auide_setup_ports(hw_regs_t *hw, _auide_hwif *ahwif)
 {
 	int i;
-	unsigned long *ata_regs = hw->io_ports;
+	unsigned long *ata_regs = hw->io_ports_array;
 
 	/* FIXME? */
-	for (i = 0; i < IDE_CONTROL_OFFSET; i++) {
+	for (i = 0; i < 8; i++)
 		*ata_regs++ = ahwif->regbase + (i << AU1XXX_ATA_REG_OFFSET);
-	}
 
 	/* set the Alternative Status register */
 	*ata_regs = ahwif->regbase + (14 << AU1XXX_ATA_REG_OFFSET);
@@ -627,7 +626,7 @@ static int au_ide_remove(struct device *dev)
 	ide_hwif_t *hwif = dev_get_drvdata(dev);
 	_auide_hwif *ahwif = &auide_hwif;
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif);
 
 	iounmap((void *)ahwif->regbase);
 
diff --git a/drivers/ide/mips/swarm.c b/drivers/ide/mips/swarm.c
index 112fe56..6894762 100644
--- a/drivers/ide/mips/swarm.c
+++ b/drivers/ide/mips/swarm.c
@@ -113,10 +113,10 @@ static int __devinit swarm_ide_probe(struct device *dev)
 
 	hwif->chipset = ide_generic;
 
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
-		hwif->io_ports[i] =
+	for (i = 0; i <= 7; i++)
+		hwif->io_ports_array[i] =
 				(unsigned long)(base + ((0x1f0 + i) << 5));
-	hwif->io_ports[IDE_CONTROL_OFFSET] =
+	hwif->io_ports.ctl_addr =
 				(unsigned long)(base + (0x3f6 << 5));
 	hwif->irq = K_INT_GB_IDE;
 
diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index ca16f37..7f46c22 100644
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -140,7 +140,7 @@ static void aec_set_pio_mode(ide_drive_t *drive, const u8 pio)
 
 static unsigned int __devinit init_chipset_aec62xx(struct pci_dev *dev, const char *name)
 {
-	int bus_speed = system_bus_clock();
+	int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock();
 
 	if (bus_speed <= 33)
 		pci_set_drvdata(dev, (void *) aec6xxx_33_base);
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index b5a3bc3..b36a22b 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -38,8 +38,6 @@
 
 #include <asm/io.h>
 
-#define DISPLAY_ALI_TIMINGS
-
 /*
  *	ALi devices are not plug in. Otherwise these static values would
  *	need to go. They ought to go away anyway
@@ -49,236 +47,6 @@ static u8 m5229_revision;
 static u8 chip_is_1543c_e;
 static struct pci_dev *isa_dev;
 
-#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
-#include <linux/stat.h>
-#include <linux/proc_fs.h>
-
-static u8 ali_proc = 0;
-
-static struct pci_dev *bmide_dev;
-
-static char *fifo[4] = {
-	"FIFO Off",
-	"FIFO On ",
-	"DMA mode",
-	"PIO mode" };
-
-static char *udmaT[8] = {
-	"1.5T",
-	"  2T",
-	"2.5T",
-	"  3T",
-	"3.5T",
-	"  4T",
-	"  6T",
-	"  8T"
-};
-
-static char *channel_status[8] = {
-	"OK            ",
-	"busy          ",
-	"DRQ           ",
-	"DRQ busy      ",
-	"error         ",
-	"error busy    ",
-	"error DRQ     ",
-	"error DRQ busy"
-};
-
-/**
- *	ali_get_info		-	generate proc file for ALi IDE
- *	@buffer: buffer to fill
- *	@addr: address of user start in buffer
- *	@offset: offset into 'file'
- *	@count: buffer count
- *
- *	Walks the Ali devices and outputs summary data on the tuning and
- *	anything else that will help with debugging
- */
- 
-static int ali_get_info (char *buffer, char **addr, off_t offset, int count)
-{
-	unsigned long bibma;
-	u8 reg53h, reg5xh, reg5yh, reg5xh1, reg5yh1, c0, c1, rev, tmp;
-	char *q, *p = buffer;
-
-	/* fetch rev. */
-	pci_read_config_byte(bmide_dev, 0x08, &rev);
-	if (rev >= 0xc1)	/* M1543C or newer */
-		udmaT[7] = " ???";
-	else
-		fifo[3]  = "   ???  ";
-
-	/* first fetch bibma: */
-	
-	bibma = pci_resource_start(bmide_dev, 4);
-
-	/*
-	 * at that point bibma+0x2 et bibma+0xa are byte
-	 * registers to investigate:
-	 */
-	c0 = inb(bibma + 0x02);
-	c1 = inb(bibma + 0x0a);
-
-	p += sprintf(p,
-		"\n                                Ali M15x3 Chipset.\n");
-	p += sprintf(p,
-		"                                ------------------\n");
-	pci_read_config_byte(bmide_dev, 0x78, &reg53h);
-	p += sprintf(p, "PCI Clock: %d.\n", reg53h);
-
-	pci_read_config_byte(bmide_dev, 0x53, &reg53h);
-	p += sprintf(p,
-		"CD_ROM FIFO:%s, CD_ROM DMA:%s\n",
-		(reg53h & 0x02) ? "Yes" : "No ",
-		(reg53h & 0x01) ? "Yes" : "No " );
-	pci_read_config_byte(bmide_dev, 0x74, &reg53h);
-	p += sprintf(p,
-		"FIFO Status: contains %d Words, runs%s%s\n\n",
-		(reg53h & 0x3f),
-		(reg53h & 0x40) ? " OVERWR" : "",
-		(reg53h & 0x80) ? " OVERRD." : "." );
-
-	p += sprintf(p,
-		"-------------------primary channel"
-		"-------------------secondary channel"
-		"---------\n\n");
-
-	pci_read_config_byte(bmide_dev, 0x09, &reg53h);
-	p += sprintf(p,
-		"channel status:       %s"
-		"                               %s\n",
-		(reg53h & 0x20) ? "On " : "Off",
-		(reg53h & 0x10) ? "On " : "Off" );
-
-	p += sprintf(p,
-		"both channels togth:  %s"
-		"                               %s\n",
-		(c0&0x80) ? "No " : "Yes",
-		(c1&0x80) ? "No " : "Yes" );
-
-	pci_read_config_byte(bmide_dev, 0x76, &reg53h);
-	p += sprintf(p,
-		"Channel state:        %s                    %s\n",
-		channel_status[reg53h & 0x07],
-		channel_status[(reg53h & 0x70) >> 4] );
-
-	pci_read_config_byte(bmide_dev, 0x58, &reg5xh);
-	pci_read_config_byte(bmide_dev, 0x5c, &reg5yh);
-	p += sprintf(p,
-		"Add. Setup Timing:    %dT"
-		"                                %dT\n",
-		(reg5xh & 0x07) ? (reg5xh & 0x07) : 8,
-		(reg5yh & 0x07) ? (reg5yh & 0x07) : 8 );
-
-	pci_read_config_byte(bmide_dev, 0x59, &reg5xh);
-	pci_read_config_byte(bmide_dev, 0x5d, &reg5yh);
-	p += sprintf(p,
-		"Command Act. Count:   %dT"
-		"                                %dT\n"
-		"Command Rec. Count:   %dT"
-		"                               %dT\n\n",
-		(reg5xh & 0x70) ? ((reg5xh & 0x70) >> 4) : 8,
-		(reg5yh & 0x70) ? ((reg5yh & 0x70) >> 4) : 8, 
-		(reg5xh & 0x0f) ? (reg5xh & 0x0f) : 16,
-		(reg5yh & 0x0f) ? (reg5yh & 0x0f) : 16 );
-
-	p += sprintf(p,
-		"----------------drive0-----------drive1"
-		"------------drive0-----------drive1------\n\n");
-	p += sprintf(p,
-		"DMA enabled:      %s              %s"
-		"               %s              %s\n",
-		(c0&0x20) ? "Yes" : "No ",
-		(c0&0x40) ? "Yes" : "No ",
-		(c1&0x20) ? "Yes" : "No ",
-		(c1&0x40) ? "Yes" : "No " );
-
-	pci_read_config_byte(bmide_dev, 0x54, &reg5xh);
-	pci_read_config_byte(bmide_dev, 0x55, &reg5yh);
-	q = "FIFO threshold:   %2d Words         %2d Words"
-		"          %2d Words         %2d Words\n";
-	if (rev < 0xc1) {
-		if ((rev == 0x20) &&
-		    (pci_read_config_byte(bmide_dev, 0x4f, &tmp), (tmp &= 0x20))) {
-			p += sprintf(p, q, 8, 8, 8, 8);
-		} else {
-			p += sprintf(p, q,
-				(reg5xh & 0x03) + 12,
-				((reg5xh & 0x30)>>4) + 12,
-				(reg5yh & 0x03) + 12,
-				((reg5yh & 0x30)>>4) + 12 );
-		}
-	} else {
-		int t1 = (tmp = (reg5xh & 0x03)) ? (tmp << 3) : 4;
-		int t2 = (tmp = ((reg5xh & 0x30)>>4)) ? (tmp << 3) : 4;
-		int t3 = (tmp = (reg5yh & 0x03)) ? (tmp << 3) : 4;
-		int t4 = (tmp = ((reg5yh & 0x30)>>4)) ? (tmp << 3) : 4;
-		p += sprintf(p, q, t1, t2, t3, t4);
-	}
-
-#if 0
-	p += sprintf(p, 
-		"FIFO threshold:   %2d Words         %2d Words"
-		"          %2d Words         %2d Words\n",
-		(reg5xh & 0x03) + 12,
-		((reg5xh & 0x30)>>4) + 12,
-		(reg5yh & 0x03) + 12,
-		((reg5yh & 0x30)>>4) + 12 );
-#endif
-
-	p += sprintf(p,
-		"FIFO mode:        %s         %s          %s         %s\n",
-		fifo[((reg5xh & 0x0c) >> 2)],
-		fifo[((reg5xh & 0xc0) >> 6)],
-		fifo[((reg5yh & 0x0c) >> 2)],
-		fifo[((reg5yh & 0xc0) >> 6)] );
-
-	pci_read_config_byte(bmide_dev, 0x5a, &reg5xh);
-	pci_read_config_byte(bmide_dev, 0x5b, &reg5xh1);
-	pci_read_config_byte(bmide_dev, 0x5e, &reg5yh);
-	pci_read_config_byte(bmide_dev, 0x5f, &reg5yh1);
-
-	p += sprintf(p,/*
-		"------------------drive0-----------drive1"
-		"------------drive0-----------drive1------\n")*/
-		"Dt RW act. Cnt    %2dT              %2dT"
-		"               %2dT              %2dT\n"
-		"Dt RW rec. Cnt    %2dT              %2dT"
-		"               %2dT              %2dT\n\n",
-		(reg5xh & 0x70) ? ((reg5xh & 0x70) >> 4) : 8,
-		(reg5xh1 & 0x70) ? ((reg5xh1 & 0x70) >> 4) : 8,
-		(reg5yh & 0x70) ? ((reg5yh & 0x70) >> 4) : 8,
-		(reg5yh1 & 0x70) ? ((reg5yh1 & 0x70) >> 4) : 8,
-		(reg5xh & 0x0f) ? (reg5xh & 0x0f) : 16,
-		(reg5xh1 & 0x0f) ? (reg5xh1 & 0x0f) : 16,
-		(reg5yh & 0x0f) ? (reg5yh & 0x0f) : 16,
-		(reg5yh1 & 0x0f) ? (reg5yh1 & 0x0f) : 16 );
-
-	p += sprintf(p,
-		"-----------------------------------UDMA Timings"
-		"--------------------------------\n\n");
-
-	pci_read_config_byte(bmide_dev, 0x56, &reg5xh);
-	pci_read_config_byte(bmide_dev, 0x57, &reg5yh);
-	p += sprintf(p,
-		"UDMA:             %s               %s"
-		"                %s               %s\n"
-		"UDMA timings:     %s             %s"
-		"              %s             %s\n\n",
-		(reg5xh & 0x08) ? "OK" : "No",
-		(reg5xh & 0x80) ? "OK" : "No",
-		(reg5yh & 0x08) ? "OK" : "No",
-		(reg5yh & 0x80) ? "OK" : "No",
-		udmaT[(reg5xh & 0x07)],
-		udmaT[(reg5xh & 0x70) >> 4],
-		udmaT[reg5yh & 0x07],
-		udmaT[(reg5yh & 0x70) >> 4] );
-
-	return p-buffer; /* => must be less than 4k! */
-}
-#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */
-
 /**
  *	ali_set_pio_mode	-	set host controller for PIO mode
  *	@drive: drive
@@ -294,7 +62,7 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
 	int s_time, a_time, c_time;
 	u8 s_clc, a_clc, r_clc;
 	unsigned long flags;
-	int bus_speed = system_bus_clock();
+	int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock();
 	int port = hwif->channel ? 0x5c : 0x58;
 	int portFIFO = hwif->channel ? 0x55 : 0x54;
 	u8 cd_dma_fifo = 0;
@@ -465,14 +233,6 @@ static unsigned int __devinit init_chipset_ali15x3 (struct pci_dev *dev, const c
 
 	isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
 
-#if defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS)
-	if (!ali_proc) {
-		ali_proc = 1;
-		bmide_dev = dev;
-		ide_pci_create_host_proc("ali", ali_get_info);
-	}
-#endif  /* defined(DISPLAY_ALI_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */
-
 	local_irq_save(flags);
 
 	if (m5229_revision < 0xC2) {
diff --git a/drivers/ide/pci/amd74xx.c b/drivers/ide/pci/amd74xx.c
index f7c8838..efcf543 100644
--- a/drivers/ide/pci/amd74xx.c
+++ b/drivers/ide/pci/amd74xx.c
@@ -179,7 +179,7 @@ static unsigned int __devinit init_chipset_amd74xx(struct pci_dev *dev,
  * Determine the system bus clock.
  */
 
-	amd_clock = system_bus_clock() * 1000;
+	amd_clock = (ide_pci_clk ? ide_pci_clk : system_bus_clock()) * 1000;
 
 	switch (amd_clock) {
 		case 33000: amd_clock = 33333; break;
diff --git a/drivers/ide/pci/cmd640.c b/drivers/ide/pci/cmd640.c
index 25c2f1b..aaf3810 100644
--- a/drivers/ide/pci/cmd640.c
+++ b/drivers/ide/pci/cmd640.c
@@ -111,10 +111,7 @@
 
 #define DRV_NAME "cmd640"
 
-/*
- * This flag is set in ide.c by the parameter:  ide0=cmd640_vlb
- */
-int cmd640_vlb;
+static int cmd640_vlb;
 
 /*
  * CMD640 specific registers definition.
@@ -350,12 +347,12 @@ static int __init secondary_port_responding(void)
 
 	spin_lock_irqsave(&cmd640_lock, flags);
 
-	outb_p(0x0a, 0x170 + IDE_SELECT_OFFSET);	/* select drive0 */
+	outb_p(0x0a, 0x176);	/* select drive0 */
 	udelay(100);
-	if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x0a) {
-		outb_p(0x1a, 0x170 + IDE_SELECT_OFFSET); /* select drive1 */
+	if ((inb_p(0x176) & 0x1f) != 0x0a) {
+		outb_p(0x1a, 0x176); /* select drive1 */
 		udelay(100);
-		if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x1a) {
+		if ((inb_p(0x176) & 0x1f) != 0x1a) {
 			spin_unlock_irqrestore(&cmd640_lock, flags);
 			return 0; /* nothing responded */
 		}
@@ -383,6 +380,7 @@ static void cmd640_dump_regs(void)
 }
 #endif
 
+#ifndef CONFIG_BLK_DEV_CMD640_ENHANCED
 /*
  * Check whether prefetch is on for a drive,
  * and initialize the unmask flags for safe operation.
@@ -403,9 +401,7 @@ static void __init check_prefetch(ide_drive_t *drive, unsigned int index)
 		drive->no_io_32bit = 0;
 	}
 }
-
-#ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-
+#else
 /*
  * Sets prefetch mode for a drive.
  */
@@ -462,34 +458,6 @@ static inline u8 pack_nibbles(u8 upper, u8 lower)
 }
 
 /*
- * This routine retrieves the initial drive timings from the chipset.
- */
-static void __init retrieve_drive_counts(unsigned int index)
-{
-	u8 b;
-
-	/*
-	 * Get the internal setup timing, and convert to clock count
-	 */
-	b = get_cmd640_reg(arttim_regs[index]) & ~0x3f;
-	switch (b) {
-	case 0x00: b = 4; break;
-	case 0x80: b = 3; break;
-	case 0x40: b = 2; break;
-	default:   b = 5; break;
-	}
-	setup_counts[index] = b;
-
-	/*
-	 * Get the active/recovery counts
-	 */
-	b = get_cmd640_reg(drwtim_regs[index]);
-	active_counts[index]   = (b >> 4)   ? (b >> 4)   : 0x10;
-	recovery_counts[index] = (b & 0x0f) ? (b & 0x0f) : 0x10;
-}
-
-
-/*
  * This routine writes the prepared setup/active/recovery counts
  * for a drive into the cmd640 chipset registers to active them.
  */
@@ -555,7 +523,14 @@ static void cmd640_set_mode(ide_drive_t *drive, unsigned int index,
 {
 	int setup_time, active_time, recovery_time, clock_time;
 	u8 setup_count, active_count, recovery_count, recovery_count2, cycle_count;
-	int bus_speed = system_bus_clock();
+	int bus_speed;
+
+	if (cmd640_vlb && ide_vlb_clk)
+		bus_speed = ide_vlb_clk;
+	else if (!cmd640_vlb && ide_pci_clk)
+		bus_speed = ide_pci_clk;
+	else
+		bus_speed = system_bus_clock();
 
 	if (pio_mode > 5)
 		pio_mode = 5;
@@ -679,7 +654,6 @@ static const struct ide_port_info cmd640_port_info __initdata = {
 	.chipset		= ide_cmd640,
 	.host_flags		= IDE_HFLAG_SERIALIZE |
 				  IDE_HFLAG_NO_DMA |
-				  IDE_HFLAG_NO_AUTOTUNE |
 				  IDE_HFLAG_ABUSE_PREFETCH |
 				  IDE_HFLAG_ABUSE_FAST_DEVSEL,
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
@@ -862,29 +836,16 @@ static int __init cmd640x_init(void)
 		}
 
 #ifdef CONFIG_BLK_DEV_CMD640_ENHANCED
-		if (drive->autotune || ((index > 1) && second_port_toggled)) {
-			/*
-			 * Reset timing to the slowest speed and turn off
-			 * prefetch.  This way, the drive identify code has
-			 * a better chance.
-			 */
-			setup_counts    [index] = 4;	/* max possible */
-			active_counts   [index] = 16;	/* max possible */
-			recovery_counts [index] = 16;	/* max possible */
-			program_drive_counts(drive, index);
-			set_prefetch_mode(drive, index, 0);
-			printk("cmd640: drive%d timings/prefetch cleared\n", index);
-		} else {
-			/*
-			 * Record timings/prefetch without changing them.
-			 * This preserves any prior BIOS setup.
-			 */
-			retrieve_drive_counts (index);
-			check_prefetch(drive, index);
-			printk("cmd640: drive%d timings/prefetch(%s) preserved",
-				index, drive->no_io_32bit ? "off" : "on");
-			display_clocks(index);
-		}
+		/*
+		 * Reset timing to the slowest speed and turn off prefetch.
+		 * This way, the drive identify code has a better chance.
+		 */
+		setup_counts    [index] = 4;	/* max possible */
+		active_counts   [index] = 16;	/* max possible */
+		recovery_counts [index] = 16;	/* max possible */
+		program_drive_counts(drive, index);
+		set_prefetch_mode(drive, index, 0);
+		printk("cmd640: drive%d timings/prefetch cleared\n", index);
 #else
 		/*
 		 * Set the drive unmask flags to match the prefetch setting
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index 006fb62..0867471 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -68,8 +68,8 @@ static u8 quantize_timing(int timing, int quant)
  */
 static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_time)
 {
-	struct pci_dev *dev	= to_pci_dev(drive->hwif->dev);
-	int clock_time		= 1000 / system_bus_clock();
+	struct pci_dev *dev = to_pci_dev(drive->hwif->dev);
+	int clock_time = 1000 / (ide_pci_clk ? ide_pci_clk : system_bus_clock());
 	u8  cycle_count, active_count, recovery_count, drwtim;
 	static const u8 recovery_values[] =
 		{15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0};
@@ -128,7 +128,7 @@ static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio)
 			    ide_pio_timings[pio].active_time);
 
 	setup_count = quantize_timing(ide_pio_timings[pio].setup_time,
-				      1000 / system_bus_clock());
+			1000 / (ide_pci_clk ? ide_pci_clk : system_bus_clock()));
 
 	/*
 	 * The primary channel has individual address setup timing registers
diff --git a/drivers/ide/pci/cy82c693.c b/drivers/ide/pci/cy82c693.c
index e30eae5..77cc22c 100644
--- a/drivers/ide/pci/cy82c693.c
+++ b/drivers/ide/pci/cy82c693.c
@@ -18,8 +18,6 @@
  *   hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA
  * - this is my first linux driver, so there's probably a lot  of room
  *   for optimizations and bug fixing, so feel free to do it.
- * - use idebus=xx parameter to set PCI bus speed - needed to calc
- *   timings for PIO modes (default will be 40)
  * - if using PIO mode it's a good idea to set the PIO mode and
  *   32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda
  * - I had some problems with my IBM DHEA with PIO modes < 2
@@ -136,7 +134,7 @@ static int calc_clk(int time, int bus_speed)
 static void compute_clocks(u8 pio, pio_clocks_t *p_pclk)
 {
 	int clk1, clk2;
-	int bus_speed = system_bus_clock();	/* get speed of PCI bus */
+	int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock();
 
 	/* we don't check against CY82C693's min and max speed,
 	 * so you can play with the idebus=xx parameter
diff --git a/drivers/ide/pci/delkin_cb.c b/drivers/ide/pci/delkin_cb.c
index c7b7e04..b9e4579 100644
--- a/drivers/ide/pci/delkin_cb.c
+++ b/drivers/ide/pci/delkin_cb.c
@@ -87,11 +87,7 @@ delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
 
 	i = hwif->index;
 
-	if (hwif->present)
-		ide_unregister(i);
-	else
-		ide_init_port_data(hwif, i);
-
+	ide_init_port_data(hwif, i);
 	ide_init_port_hw(hwif, &hw);
 	hwif->port_ops = &delkin_cb_port_ops;
 
@@ -123,8 +119,7 @@ delkin_cb_remove (struct pci_dev *dev)
 {
 	ide_hwif_t *hwif = pci_get_drvdata(dev);
 
-	if (hwif)
-		ide_unregister(hwif->index);
+	ide_unregister(hwif);
 
 	pci_release_regions(dev);
 	pci_disable_device(dev);
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index 8c02961..c929dad 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -760,7 +760,7 @@ static void hpt3xx_maskproc(ide_drive_t *drive, int mask)
 		}
 	} else
 		outb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
-		     hwif->io_ports[IDE_CONTROL_OFFSET]);
+		     hwif->io_ports.ctl_addr);
 }
 
 /*
diff --git a/drivers/ide/pci/ns87415.c b/drivers/ide/pci/ns87415.c
index e1b0c9a..c13e299 100644
--- a/drivers/ide/pci/ns87415.c
+++ b/drivers/ide/pci/ns87415.c
@@ -72,8 +72,8 @@ static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
 	base = pci_resource_start(pdev, port * 2) & ~3;
 	dmabase = pci_resource_start(pdev, 4) & ~3;
 
-	superio_ide_status[port] = base + IDE_STATUS_OFFSET;
-	superio_ide_select[port] = base + IDE_SELECT_OFFSET;
+	superio_ide_status[port] = base + 7;
+	superio_ide_select[port] = base + 6;
 	superio_ide_dma_status[port] = dmabase + (!port ? 2 : 0xa);
 
 	/* Clear error/interrupt, enable dma */
@@ -231,12 +231,12 @@ static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
 		 *      SELECT_DRIVE() properly during first ide_probe_port().
 		 */
 		timeout = 10000;
-		outb(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
+		outb(12, hwif->io_ports.ctl_addr);
 		udelay(10);
-		outb(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
+		outb(8, hwif->io_ports.ctl_addr);
 		do {
 			udelay(50);
-			stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+			stat = hwif->INB(hwif->io_ports.status_addr);
                 	if (stat == 0xff)
                         	break;
         	} while ((stat & BUSY_STAT) && --timeout);
@@ -244,7 +244,7 @@ static void __devinit init_hwif_ns87415 (ide_hwif_t *hwif)
 	}
 
 	if (!using_inta)
-		hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]);
+		hwif->irq = ide_default_irq(hwif->io_ports.data_addr);
 	else if (!hwif->irq && hwif->mate && hwif->mate->irq)
 		hwif->irq = hwif->mate->irq;	/* share IRQ with mate */
 
diff --git a/drivers/ide/pci/opti621.c b/drivers/ide/pci/opti621.c
index 9edacba..6e99080 100644
--- a/drivers/ide/pci/opti621.c
+++ b/drivers/ide/pci/opti621.c
@@ -53,8 +53,7 @@
  * If you then set the second drive to another PIO, the old value
  * (automatically selected) will be overrided by yours.
  * There is a 25/33MHz switch in configuration
- * register, but driver is written for use at any frequency which get
- * (use idebus=xx to select PCI bus speed).
+ * register, but driver is written for use at any frequency.
  *
  * Version 0.1, Nov 8, 1996
  * by Jaromir Koutek, for 2.1.8.
@@ -210,7 +209,7 @@ static void compute_clocks(int pio, pio_clocks_t *clks)
 {
 	if (pio != PIO_NOT_EXIST) {
 		int adr_setup, data_pls;
-		int bus_speed = system_bus_clock();
+		int bus_speed = ide_pci_clk ? ide_pci_clk : system_bus_clock();
 
 		adr_setup = ide_pio_timings[pio].setup_time;
 		data_pls = ide_pio_timings[pio].active_time;
@@ -280,7 +279,7 @@ static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio)
 
 	spin_lock_irqsave(&opti621_lock, flags);
 
-	reg_base = hwif->io_ports[IDE_DATA_OFFSET];
+	reg_base = hwif->io_ports.data_addr;
 
 	/* allow Register-B */
 	outb(0xc0, reg_base + CNTRL_REG);
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index 17cf864..ad7cdf9 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -334,7 +334,7 @@ static int scc_dma_end(ide_drive_t *drive)
 
 	/* errata A308 workaround: Step5 (check data loss) */
 	/* We don't check non ide_disk because it is limited to UDMA4 */
-	if (!(in_be32((void __iomem *)hwif->io_ports[IDE_ALTSTATUS_OFFSET])
+	if (!(in_be32((void __iomem *)hwif->io_ports.ctl_addr)
 	      & ERR_STAT) &&
 	    drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
 		reg = in_be32((void __iomem *)intsts_port);
@@ -438,7 +438,7 @@ static int scc_dma_test_irq(ide_drive_t *drive)
 	u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014);
 
 	/* SCC errata A252,A308 workaround: Step4 */
-	if ((in_be32((void __iomem *)hwif->io_ports[IDE_ALTSTATUS_OFFSET])
+	if ((in_be32((void __iomem *)hwif->io_ports.ctl_addr)
 	     & ERR_STAT) &&
 	    (int_stat & INTSTS_INTRQ))
 		return 1;
@@ -534,8 +534,8 @@ static int scc_ide_setup_pci_device(struct pci_dev *dev,
 	}
 
 	memset(&hw, 0, sizeof(hw));
-	for (i = IDE_DATA_OFFSET; i <= IDE_CONTROL_OFFSET; i++)
-		hw.io_ports[i] = ports->dma + 0x20 + i * 4;
+	for (i = 0; i <= 8; i++)
+		hw.io_ports_array[i] = ports->dma + 0x20 + i * 4;
 	hw.irq = dev->irq;
 	hw.dev = &dev->dev;
 	hw.chipset = ide_pci;
@@ -763,9 +763,8 @@ static void __devexit scc_remove(struct pci_dev *dev)
 		hwif->dmatable_cpu = NULL;
 	}
 
-	ide_unregister(hwif->index);
+	ide_unregister(hwif);
 
-	hwif->chipset = ide_unknown;
 	iounmap((void*)ports->dma);
 	iounmap((void*)ports->ctl);
 	pci_release_selected_regions(dev, (1 << 2) - 1);
diff --git a/drivers/ide/pci/sgiioc4.c b/drivers/ide/pci/sgiioc4.c
index 321a4e2..63e28f4 100644
--- a/drivers/ide/pci/sgiioc4.c
+++ b/drivers/ide/pci/sgiioc4.c
@@ -98,28 +98,28 @@ sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
 	int i;
 
 	/* Registers are word (32 bit) aligned */
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
-		hw->io_ports[i] = reg + i * 4;
+	for (i = 0; i <= 7; i++)
+		hw->io_ports_array[i] = reg + i * 4;
 
 	if (ctrl_port)
-		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
+		hw->io_ports.ctl_addr = ctrl_port;
 
 	if (irq_port)
-		hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
+		hw->io_ports.irq_addr = irq_port;
 }
 
 static void
 sgiioc4_maskproc(ide_drive_t * drive, int mask)
 {
 	writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
-	       (void __iomem *)drive->hwif->io_ports[IDE_CONTROL_OFFSET]);
+	       (void __iomem *)drive->hwif->io_ports.ctl_addr);
 }
 
 static int
 sgiioc4_checkirq(ide_hwif_t * hwif)
 {
 	unsigned long intr_addr =
-		hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4;
+		hwif->io_ports.irq_addr + IOC4_INTR_REG * 4;
 
 	if ((u8)readl((void __iomem *)intr_addr) & 0x03)
 		return 1;
@@ -134,8 +134,8 @@ sgiioc4_clearirq(ide_drive_t * drive)
 {
 	u32 intr_reg;
 	ide_hwif_t *hwif = HWIF(drive);
-	unsigned long other_ir =
-	    hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2);
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+	unsigned long other_ir = io_ports->irq_addr + (IOC4_INTR_REG << 2);
 
 	/* Code to check for PCI error conditions */
 	intr_reg = readl((void __iomem *)other_ir);
@@ -147,12 +147,12 @@ sgiioc4_clearirq(ide_drive_t * drive)
 		 * a "clear" status if it got cleared.  If not, then spin
 		 * for a bit trying to clear it.
 		 */
-		u8 stat = sgiioc4_INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+		u8 stat = sgiioc4_INB(io_ports->status_addr);
 		int count = 0;
-		stat = sgiioc4_INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+		stat = sgiioc4_INB(io_ports->status_addr);
 		while ((stat & 0x80) && (count++ < 100)) {
 			udelay(1);
-			stat = sgiioc4_INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+			stat = sgiioc4_INB(io_ports->status_addr);
 		}
 
 		if (intr_reg & 0x02) {
@@ -162,9 +162,9 @@ sgiioc4_clearirq(ide_drive_t * drive)
 			    pci_stat_cmd_reg;
 
 			pci_err_addr_low =
-				readl((void __iomem *)hwif->io_ports[IDE_IRQ_OFFSET]);
+				readl((void __iomem *)io_ports->irq_addr);
 			pci_err_addr_high =
-				readl((void __iomem *)(hwif->io_ports[IDE_IRQ_OFFSET] + 4));
+				readl((void __iomem *)(io_ports->irq_addr + 4));
 			pci_read_config_dword(dev, PCI_COMMAND,
 					      &pci_stat_cmd_reg);
 			printk(KERN_ERR
@@ -573,7 +573,6 @@ static const struct ide_port_info sgiioc4_port_info __devinitdata = {
 	.init_dma		= ide_dma_sgiioc4,
 	.port_ops		= &sgiioc4_port_ops,
 	.dma_ops		= &sgiioc4_dma_ops,
-	.host_flags		= IDE_HFLAG_NO_AUTOTUNE,
 	.mwdma_mask		= ATA_MWDMA2_ONLY,
 };
 
diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 1fffea3..c2040a0 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -622,9 +622,10 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 	struct pci_dev *dev	= to_pci_dev(hwif->dev);
 	void *addr		= pci_get_drvdata(dev);
 	u8 ch			= hwif->channel;
-	hw_regs_t		hw;
 	unsigned long		base;
 
+	struct ide_io_ports *io_ports = &hwif->io_ports;
+
 	/*
 	 *	Fill in the basic HWIF bits
 	 */
@@ -638,7 +639,7 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 	 *	based I/O
 	 */
 
-	memset(&hw, 0, sizeof(hw_regs_t));
+	memset(io_ports, 0, sizeof(*io_ports));
 
 	base = (unsigned long)addr;
 	if (ch)
@@ -651,17 +652,15 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 	 *	so we can't currently use it sanely since we want to
 	 *	use LBA48 mode.
 	 */	
-	hw.io_ports[IDE_DATA_OFFSET]	= base;
-	hw.io_ports[IDE_ERROR_OFFSET]	= base + 1;
-	hw.io_ports[IDE_NSECTOR_OFFSET]	= base + 2;
-	hw.io_ports[IDE_SECTOR_OFFSET]	= base + 3;
-	hw.io_ports[IDE_LCYL_OFFSET]	= base + 4;
-	hw.io_ports[IDE_HCYL_OFFSET]	= base + 5;
-	hw.io_ports[IDE_SELECT_OFFSET]	= base + 6;
-	hw.io_ports[IDE_STATUS_OFFSET]	= base + 7;
-	hw.io_ports[IDE_CONTROL_OFFSET]	= base + 10;
-
-	hw.io_ports[IDE_IRQ_OFFSET]	= 0;
+	io_ports->data_addr	= base;
+	io_ports->error_addr	= base + 1;
+	io_ports->nsect_addr	= base + 2;
+	io_ports->lbal_addr	= base + 3;
+	io_ports->lbam_addr	= base + 4;
+	io_ports->lbah_addr	= base + 5;
+	io_ports->device_addr	= base + 6;
+	io_ports->status_addr	= base + 7;
+	io_ports->ctl_addr	= base + 10;
 
 	if (pdev_is_sata(dev)) {
 		base = (unsigned long)addr;
@@ -672,8 +671,6 @@ static void __devinit init_mmio_iops_siimage(ide_hwif_t *hwif)
 		hwif->sata_scr[SATA_CONTROL_OFFSET]	= base + 0x100;
 	}
 
-	memcpy(hwif->io_ports, hw.io_ports, sizeof(hwif->io_ports));
-
 	hwif->irq = dev->irq;
 
 	hwif->dma_base = (unsigned long)addr + (ch ? 0x08 : 0x00);
diff --git a/drivers/ide/pci/trm290.c b/drivers/ide/pci/trm290.c
index 15ee38f..a8a3138 100644
--- a/drivers/ide/pci/trm290.c
+++ b/drivers/ide/pci/trm290.c
@@ -298,7 +298,7 @@ static void __devinit init_hwif_trm290(ide_hwif_t *hwif)
 		if (old != compat && old_mask == 0xff) {
 			/* leave lower 10 bits untouched */
 			compat += (next_offset += 0x400);
-			hwif->io_ports[IDE_CONTROL_OFFSET] = compat + 2;
+			hwif->io_ports.ctl_addr = compat + 2;
 			outw(compat | 1, hwif->config_data);
 			new = inw(hwif->config_data);
 			printk(KERN_INFO "%s: control basereg workaround: "
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index bbd17be..566e0ec 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -340,7 +340,7 @@ static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const
 	 * Determine system bus clock.
 	 */
 
-	via_clock = system_bus_clock() * 1000;
+	via_clock = (ide_pci_clk ? ide_pci_clk : system_bus_clock()) * 1000;
 
 	switch (via_clock) {
 		case 33000: via_clock = 33333; break;
diff --git a/drivers/ide/ppc/mpc8xx.c b/drivers/ide/ppc/mpc8xx.c
index a82f6ef..f0e638d 100644
--- a/drivers/ide/ppc/mpc8xx.c
+++ b/drivers/ide/ppc/mpc8xx.c
@@ -131,7 +131,7 @@ static int pcmcia_schlvl = PCMCIA_SCHLVL;
 #if defined(CONFIG_IDE_8xx_PCCARD) || defined(CONFIG_IDE_8xx_DIRECT)
 static int __init m8xx_ide_init_ports(hw_regs_t *hw, unsigned long data_port)
 {
-	unsigned long *p = hw->io_ports;
+	unsigned long *p = hw->io_ports_array;
 	int i;
 
 	typedef struct {
@@ -314,7 +314,7 @@ static int __init m8xx_ide_init_ports(hw_regs_t *hw, unsigned long data_port)
 #if defined(CONFIG_IDE_EXT_DIRECT)
 static int __init m8xx_ide_init_ports(hw_regs_t *hw, unsigned long data_port)
 {
-	unsigned long *p = hw->io_ports;
+	unsigned long *p = hw->io_ports_array;
 	int i;
 
 	u32 ide_phy_base;
@@ -811,24 +811,28 @@ static int __init mpc8xx_ide_probe(void)
 #ifdef IDE0_BASE_OFFSET
 	memset(&hw, 0, sizeof(hw));
 	if (!m8xx_ide_init_ports(&hw, 0)) {
-		ide_hwif_t *hwif = &ide_hwifs[0];
+		ide_hwif_t *hwif = ide_find_port();
 
-		ide_init_port_hw(hwif, &hw);
-		hwif->pio_mask = ATA_PIO4;
-		hwif->port_ops = &m8xx_port_ops;
+		if (hwif) {
+			ide_init_port_hw(hwif, &hw);
+			hwif->pio_mask = ATA_PIO4;
+			hwif->port_ops = &m8xx_port_ops;
 
-		idx[0] = 0;
+			idx[0] = hwif->index;
+		}
 	}
 #ifdef IDE1_BASE_OFFSET
 	memset(&hw, 0, sizeof(hw));
 	if (!m8xx_ide_init_ports(&hw, 1)) {
-		ide_hwif_t *mate = &ide_hwifs[1];
+		ide_hwif_t *mate = ide_find_port();
 
-		ide_init_port_hw(mate, &hw);
-		mate->pio_mask = ATA_PIO4;
-		mate->port_ops = &m8xx_port_ops;
+		if (mate) {
+			ide_init_port_hw(mate, &hw);
+			mate->pio_mask = ATA_PIO4;
+			mate->port_ops = &m8xx_port_ops;
 
-		idx[1] = 1;
+			idx[1] = mate->index;
+		}
 	}
 #endif
 #endif
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 185faa0..3cac6b2 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -417,7 +417,7 @@ static void pmac_ide_kauai_selectproc(ide_drive_t *drive);
 #endif /* CONFIG_BLK_DEV_IDEDMA_PMAC */
 
 #define PMAC_IDE_REG(x) \
-	((void __iomem *)((drive)->hwif->io_ports[IDE_DATA_OFFSET] + (x)))
+	((void __iomem *)((drive)->hwif->io_ports.data_addr + (x)))
 
 /*
  * Apply the timings of the proper unit (master/slave) to the shared
@@ -1086,8 +1086,9 @@ static void __devinit pmac_ide_init_ports(hw_regs_t *hw, unsigned long base)
 	int i;
 
 	for (i = 0; i < 8; ++i)
-		hw->io_ports[i] = base + i * 0x10;
-	hw->io_ports[8] = base + 0x160;
+		hw->io_ports_array[i] = base + i * 0x10;
+
+	hw->io_ports.ctl_addr = base + 0x160;
 }
 
 /*
diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 3638fa8..3255363 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -258,8 +258,7 @@ idescsi_atapi_error(ide_drive_t *drive, struct request *rq, u8 stat, u8 err)
 
 	if (ide_read_status(drive) & (BUSY_STAT | DRQ_STAT))
 		/* force an abort */
-		hwif->OUTB(WIN_IDLEIMMEDIATE,
-			   hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTB(WIN_IDLEIMMEDIATE, hwif->io_ports.command_addr);
 
 	rq->errors++;
 
@@ -410,9 +409,9 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		idescsi_end_request (drive, 1, 0);
 		return ide_stopped;
 	}
-	bcount = (hwif->INB(hwif->io_ports[IDE_BCOUNTH_OFFSET]) << 8) |
-		  hwif->INB(hwif->io_ports[IDE_BCOUNTL_OFFSET]);
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
+		  hwif->INB(hwif->io_ports.lbam_addr);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 
 	if (ireason & CD) {
 		printk(KERN_ERR "ide-scsi: CoD != 0 in idescsi_pc_intr\n");
@@ -485,7 +484,7 @@ static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 			"initiated yet DRQ isn't asserted\n");
 		return startstop;
 	}
-	ireason = hwif->INB(hwif->io_ports[IDE_IREASON_OFFSET]);
+	ireason = hwif->INB(hwif->io_ports.nsect_addr);
 	if ((ireason & CD) == 0 || (ireason & IO)) {
 		printk(KERN_ERR "ide-scsi: (IO,CoD) != (0,1) while "
 				"issuing a packet command\n");
@@ -575,7 +574,7 @@ static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
 		return ide_started;
 	} else {
 		/* Issue the packet command */
-		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports[IDE_COMMAND_OFFSET]);
+		hwif->OUTB(WIN_PACKETCMD, hwif->io_ports.command_addr);
 		return idescsi_transfer_pc(drive);
 	}
 }
diff --git a/include/asm-arm/arch-sa1100/ide.h b/include/asm-arm/arch-sa1100/ide.h
index 98b10bc..b14cbda 100644
--- a/include/asm-arm/arch-sa1100/ide.h
+++ b/include/asm-arm/arch-sa1100/ide.h
@@ -37,12 +37,12 @@ static inline void ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port,
 
 	memset(hw, 0, sizeof(*hw));
 
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
-		hw->io_ports[i] = reg;
+	for (i = 0; i <= 7; i++) {
+		hw->io_ports_array[i] = reg;
 		reg += regincr;
 	}
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
+	hw->io_ports.ctl_addr = ctrl_port;
 
 	if (irq)
 		*irq = 0;
diff --git a/include/asm-cris/arch-v10/ide.h b/include/asm-cris/arch-v10/ide.h
index ea34e0d..5366e62 100644
--- a/include/asm-cris/arch-v10/ide.h
+++ b/include/asm-cris/arch-v10/ide.h
@@ -59,22 +59,19 @@ static inline void ide_init_hwif_ports(hw_regs_t *hw, unsigned long data_port, u
 	int i;
 
 	/* fill in ports for ATA addresses 0 to 7 */
-
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
-		hw->io_ports[i] = data_port |
+	for (i = 0; i <= 7; i++) {
+		hw->io_ports_array[i] = data_port |
 			IO_FIELD(R_ATA_CTRL_DATA, addr, i) |
 			IO_STATE(R_ATA_CTRL_DATA, cs0, active);
 	}
 
 	/* the IDE control register is at ATA address 6, with CS1 active instead of CS0 */
-
-	hw->io_ports[IDE_CONTROL_OFFSET] = data_port |
+	hw->io_ports.ctl_addr = data_port |
 			IO_FIELD(R_ATA_CTRL_DATA, addr, 6) |
 			IO_STATE(R_ATA_CTRL_DATA, cs1, active);
 
 	/* whats this for ? */
-
-	hw->io_ports[IDE_IRQ_OFFSET] = 0;
+	hw->io_ports.irq_addr = 0;
 }
 
 static inline void ide_init_default_hwifs(void)
diff --git a/include/linux/ide.h b/include/linux/ide.h
index f0af504..32fd77b 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -48,13 +48,6 @@ typedef unsigned char	byte;	/* used everywhere */
 #define ERROR_RECAL	1	/* Recalibrate every 2nd retry */
 
 /*
- * Tune flags
- */
-#define IDE_TUNE_NOAUTO		2
-#define IDE_TUNE_AUTO		1
-#define IDE_TUNE_DEFAULT	0
-
-/*
  * state flags
  */
 
@@ -68,23 +61,30 @@ typedef unsigned char	byte;	/* used everywhere */
  */
 #define IDE_NR_PORTS		(10)
 
-#define IDE_DATA_OFFSET		(0)
-#define IDE_ERROR_OFFSET	(1)
-#define IDE_NSECTOR_OFFSET	(2)
-#define IDE_SECTOR_OFFSET	(3)
-#define IDE_LCYL_OFFSET		(4)
-#define IDE_HCYL_OFFSET		(5)
-#define IDE_SELECT_OFFSET	(6)
-#define IDE_STATUS_OFFSET	(7)
-#define IDE_CONTROL_OFFSET	(8)
-#define IDE_IRQ_OFFSET		(9)
-
-#define IDE_FEATURE_OFFSET	IDE_ERROR_OFFSET
-#define IDE_COMMAND_OFFSET	IDE_STATUS_OFFSET
-#define IDE_ALTSTATUS_OFFSET	IDE_CONTROL_OFFSET
-#define IDE_IREASON_OFFSET	IDE_NSECTOR_OFFSET
-#define IDE_BCOUNTL_OFFSET	IDE_LCYL_OFFSET
-#define IDE_BCOUNTH_OFFSET	IDE_HCYL_OFFSET
+struct ide_io_ports {
+	unsigned long	data_addr;
+
+	union {
+		unsigned long error_addr;	/*   read:  error */
+		unsigned long feature_addr;	/*  write: feature */
+	};
+
+	unsigned long	nsect_addr;
+	unsigned long	lbal_addr;
+	unsigned long	lbam_addr;
+	unsigned long	lbah_addr;
+
+	unsigned long	device_addr;
+
+	union {
+		unsigned long status_addr;	/*  read: status  */
+		unsigned long command_addr;	/* write: command */
+	};
+
+	unsigned long	ctl_addr;
+
+	unsigned long	irq_addr;
+};
 
 #define OK_STAT(stat,good,bad)	(((stat)&((good)|(bad)))==(good))
 #define BAD_R_STAT		(BUSY_STAT   | ERR_STAT)
@@ -163,7 +163,11 @@ typedef u8 hwif_chipset_t;
  * Structure to hold all information about the location of this port
  */
 typedef struct hw_regs_s {
-	unsigned long	io_ports[IDE_NR_PORTS];	/* task file registers */
+	union {
+		struct ide_io_ports	io_ports;
+		unsigned long		io_ports_array[IDE_NR_PORTS];
+	};
+
 	int		irq;			/* our irq number */
 	ide_ack_intr_t	*ack_intr;		/* acknowledge interrupt */
 	hwif_chipset_t  chipset;
@@ -179,10 +183,10 @@ static inline void ide_std_init_ports(hw_regs_t *hw,
 {
 	unsigned int i;
 
-	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
-		hw->io_ports[i] = io_addr++;
+	for (i = 0; i <= 7; i++)
+		hw->io_ports_array[i] = io_addr++;
 
-	hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
+	hw->io_ports.ctl_addr = ctl_addr;
 }
 
 #include <asm/ide.h>
@@ -328,7 +332,6 @@ typedef struct ide_drive_s {
 	unsigned atapi_overlap	: 1;	/* ATAPI overlap (not supported) */
 	unsigned doorlocking	: 1;	/* for removable only: door lock/unlock works */
 	unsigned nodma		: 1;	/* disallow DMA */
-	unsigned autotune	: 2;	/* 0=default, 1=autotune, 2=noautotune */
 	unsigned remap_0_to_1	: 1;	/* 0=noremap, 1=remap 0->1 (for EZDrive) */
 	unsigned blocked        : 1;	/* 1=powermanagment told us not to do anything, so sleep nicely */
 	unsigned vdma		: 1;	/* 1=doing PIO over DMA 0=doing normal DMA */
@@ -432,8 +435,8 @@ typedef struct hwif_s {
 
 	char name[6];			/* name of interface, eg. "ide0" */
 
-		/* task file registers for pata and sata */
-	unsigned long	io_ports[IDE_NR_PORTS];
+	struct ide_io_ports	io_ports;
+
 	unsigned long	sata_scr[SATA_NR_PORTS];
 
 	ide_drive_t	drives[MAX_DRIVES];	/* drive info */
@@ -520,7 +523,6 @@ typedef struct hwif_s {
 	unsigned	present    : 1;	/* this interface exists */
 	unsigned	serialized : 1;	/* serialized all channel operation */
 	unsigned	sharing_irq: 1;	/* 1 = sharing irq with another hwif */
-	unsigned	reset      : 1;	/* reset after probe */
 	unsigned	sg_mapped  : 1;	/* sg_table and sg_nents are ready */
 	unsigned	mmio       : 1; /* host uses MMIO */
 
@@ -703,10 +705,6 @@ void ide_add_generic_settings(ide_drive_t *);
 read_proc_t proc_ide_read_capacity;
 read_proc_t proc_ide_read_geometry;
 
-#ifdef CONFIG_BLK_DEV_IDEPCI
-void ide_pci_create_host_proc(const char *, get_info_t *);
-#endif
-
 /*
  * Standard exit stuff:
  */
@@ -807,8 +805,14 @@ int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsig
 #ifndef _IDE_C
 extern	ide_hwif_t	ide_hwifs[];		/* master data repository */
 #endif
+extern int ide_noacpi;
+extern int ide_acpigtf;
+extern int ide_acpionboot;
 extern int noautodma;
 
+extern int ide_vlb_clk;
+extern int ide_pci_clk;
+
 ide_hwif_t *ide_find_port_slot(const struct ide_port_info *);
 
 static inline ide_hwif_t *ide_find_port(void)
@@ -1068,8 +1072,6 @@ enum {
 	IDE_HFLAG_NO_DMA		= (1 << 14),
 	/* check if host is PCI IDE device before allowing DMA */
 	IDE_HFLAG_NO_AUTODMA		= (1 << 15),
-	/* don't autotune PIO */
-	IDE_HFLAG_NO_AUTOTUNE		= (1 << 16),
 	/* host is CS5510/CS5520 */
 	IDE_HFLAG_CS5520		= IDE_HFLAG_VDMA,
 	/* no LBA48 */
@@ -1215,13 +1217,15 @@ static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
 #endif
 
 void ide_remove_port_from_hwgroup(ide_hwif_t *);
-void ide_unregister(unsigned int);
+void ide_unregister(ide_hwif_t *);
 
 void ide_register_region(struct gendisk *);
 void ide_unregister_region(struct gendisk *);
 
 void ide_undecoded_slave(ide_drive_t *);
 
+void ide_port_apply_params(ide_hwif_t *);
+
 int ide_device_add_all(u8 *idx, const struct ide_port_info *);
 int ide_device_add(u8 idx[4], const struct ide_port_info *);
 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
@@ -1333,29 +1337,28 @@ static inline void ide_set_irq(ide_drive_t *drive, int on)
 {
 	ide_hwif_t *hwif = drive->hwif;
 
-	hwif->OUTB(drive->ctl | (on ? 0 : 2),
-		   hwif->io_ports[IDE_CONTROL_OFFSET]);
+	hwif->OUTB(drive->ctl | (on ? 0 : 2), hwif->io_ports.ctl_addr);
 }
 
 static inline u8 ide_read_status(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 
-	return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
+	return hwif->INB(hwif->io_ports.status_addr);
 }
 
 static inline u8 ide_read_altstatus(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 
-	return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
+	return hwif->INB(hwif->io_ports.ctl_addr);
 }
 
 static inline u8 ide_read_error(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 
-	return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
+	return hwif->INB(hwif->io_ports.error_addr);
 }
 
 /*
@@ -1368,7 +1371,7 @@ static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount)
 
 	/* FIXME: use ->atapi_input_bytes */
 	while (bcount--)
-		(void)hwif->INB(hwif->io_ports[IDE_DATA_OFFSET]);
+		(void)hwif->INB(hwif->io_ports.data_addr);
 }
 
 static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
@@ -1377,7 +1380,7 @@ static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount)
 
 	/* FIXME: use ->atapi_output_bytes */
 	while (bcount--)
-		hwif->OUTB(0, hwif->io_ports[IDE_DATA_OFFSET]);
+		hwif->OUTB(0, hwif->io_ports.data_addr);
 }
 
 #endif /* _IDE_H */

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2008-04-27 14:14 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-02-02 19:35 [git patches] IDE updates part #4 Bartlomiej Zolnierkiewicz
2008-02-05 19:09 ` Linus Torvalds
2008-02-06  0:48   ` Bartlomiej Zolnierkiewicz
2008-04-27 14:26 [git patches] IDE updates part 4 Bartlomiej Zolnierkiewicz

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