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* Why to I2c drivers not autoload like other PCI devices?
@ 2007-01-04  0:50 Stephen Hemminger
  2007-01-04  0:56 ` Greg KH
  0 siblings, 1 reply; 8+ messages in thread
From: Stephen Hemminger @ 2007-01-04  0:50 UTC (permalink / raw)
  To: Greg KH; +Cc: i2c, linux-kernel

Is there some missing magic (udev rule?) that keeps i2c device modules
from loading? For example: the Intel i2c-i801 module ought to get loaded
automatically on boot up since it has a set of PCI id's that generate
the necessary module aliases. It would be better if I2C device's autoloaded
like other PCI devices.


-- 
Stephen Hemminger <shemminger@osdl.org>

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: Why to I2c drivers not autoload like other PCI devices?
  2007-01-04  0:50 Why to I2c drivers not autoload like other PCI devices? Stephen Hemminger
@ 2007-01-04  0:56 ` Greg KH
  2007-01-04  1:29   ` Stephen Hemminger
  0 siblings, 1 reply; 8+ messages in thread
From: Greg KH @ 2007-01-04  0:56 UTC (permalink / raw)
  To: Stephen Hemminger; +Cc: i2c, linux-kernel

On Wed, Jan 03, 2007 at 04:50:20PM -0800, Stephen Hemminger wrote:
> Is there some missing magic (udev rule?) that keeps i2c device modules
> from loading? For example: the Intel i2c-i801 module ought to get loaded
> automatically on boot up since it has a set of PCI id's that generate
> the necessary module aliases. It would be better if I2C device's autoloaded
> like other PCI devices.

No, it should autoload, if it has a MODULE_DEVICE_TABLE() in it.  In
fact, the i2c-i801 autoloads on one of my machines just fine.  Are you
sure your pci ids match properly?

thanks,

greg k-h

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: Why to I2c drivers not autoload like other PCI devices?
  2007-01-04  0:56 ` Greg KH
@ 2007-01-04  1:29   ` Stephen Hemminger
  2007-01-04  5:51     ` Greg KH
  0 siblings, 1 reply; 8+ messages in thread
From: Stephen Hemminger @ 2007-01-04  1:29 UTC (permalink / raw)
  To: Greg KH; +Cc: i2c, linux-kernel

On Wed, 3 Jan 2007 16:56:00 -0800
Greg KH <greg@kroah.com> wrote:

> On Wed, Jan 03, 2007 at 04:50:20PM -0800, Stephen Hemminger wrote:
> > Is there some missing magic (udev rule?) that keeps i2c device modules
> > from loading? For example: the Intel i2c-i801 module ought to get loaded
> > automatically on boot up since it has a set of PCI id's that generate
> > the necessary module aliases. It would be better if I2C device's autoloaded
> > like other PCI devices.
> 
> No, it should autoload, if it has a MODULE_DEVICE_TABLE() in it.  In
> fact, the i2c-i801 autoloads on one of my machines just fine.  Are you
> sure your pci ids match properly?
> 
> thanks,
> 
> greg k-h

This laptop is running Ubuntu Edgy (6.10) and it doesn't autoload.
Everything works fine if I manually load the module with modprobe.

This device should match:

00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
00: 86 80 da 27 01 00 80 02 02 00 05 0c 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20: a1 18 00 00 00 00 00 00 00 00 00 00 cf 10 88 13
30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00

This driver modinfo:

filename:       /lib/modules/2.6.20-rc3/kernel/drivers/i2c/busses/i2c-i801.ko
author:         Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker <mdsxyz123@yahoo.com>
description:    I801 SMBus driver
license:        GPL
vermagic:       2.6.20-rc3 mod_unload PENTIUMM 4KSTACKS 
depends:        i2c-core
alias:          pci:v00008086d00002413sv*sd*bc*sc*i*
alias:          pci:v00008086d00002423sv*sd*bc*sc*i*
alias:          pci:v00008086d00002443sv*sd*bc*sc*i*
alias:          pci:v00008086d00002483sv*sd*bc*sc*i*
alias:          pci:v00008086d000024C3sv*sd*bc*sc*i*
alias:          pci:v00008086d000024D3sv*sd*bc*sc*i*
alias:          pci:v00008086d000025A4sv*sd*bc*sc*i*
alias:          pci:v00008086d0000266Asv*sd*bc*sc*i*
alias:          pci:v00008086d000027DAsv*sd*bc*sc*i*       <------- should match
alias:          pci:v00008086d0000269Bsv*sd*bc*sc*i*
alias:          pci:v00008086d0000283Esv*sd*bc*sc*i*
alias:          pci:v00008086d00002930sv*sd*bc*sc*i*

Table in drivers/i2c/busses/i2c-i801.c

static struct pci_device_id i801_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_3) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_3) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_2) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_3) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_3) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_3) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_4) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_16) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_17) },                <------ should match
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB2_17) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_5) },
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_6) },
	{ 0, }
};

MODULE_DEVICE_TABLE (pci, i801_ids);




-- 
Stephen Hemminger <shemminger@osdl.org>

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: Why to I2c drivers not autoload like other PCI devices?
  2007-01-04  1:29   ` Stephen Hemminger
@ 2007-01-04  5:51     ` Greg KH
  2007-01-04 16:54       ` [i2c] " Jean Delvare
  0 siblings, 1 reply; 8+ messages in thread
From: Greg KH @ 2007-01-04  5:51 UTC (permalink / raw)
  To: Stephen Hemminger; +Cc: i2c, linux-kernel

On Wed, Jan 03, 2007 at 05:29:16PM -0800, Stephen Hemminger wrote:
> On Wed, 3 Jan 2007 16:56:00 -0800
> Greg KH <greg@kroah.com> wrote:
> 
> > On Wed, Jan 03, 2007 at 04:50:20PM -0800, Stephen Hemminger wrote:
> > > Is there some missing magic (udev rule?) that keeps i2c device modules
> > > from loading? For example: the Intel i2c-i801 module ought to get loaded
> > > automatically on boot up since it has a set of PCI id's that generate
> > > the necessary module aliases. It would be better if I2C device's autoloaded
> > > like other PCI devices.
> > 
> > No, it should autoload, if it has a MODULE_DEVICE_TABLE() in it.  In
> > fact, the i2c-i801 autoloads on one of my machines just fine.  Are you
> > sure your pci ids match properly?
> > 
> > thanks,
> > 
> > greg k-h
> 
> This laptop is running Ubuntu Edgy (6.10) and it doesn't autoload.
> Everything works fine if I manually load the module with modprobe.
> 
> This device should match:
> 
> 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
> 00: 86 80 da 27 01 00 80 02 02 00 05 0c 00 00 00 00
> 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 20: a1 18 00 00 00 00 00 00 00 00 00 00 cf 10 88 13
> 30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00
> 
> This driver modinfo:
> 
> filename:       /lib/modules/2.6.20-rc3/kernel/drivers/i2c/busses/i2c-i801.ko

What does:
	modprobe --show-depends `cat /sys/bus/pci/0000:00:1f.3/modalias`
show?

Is it different from:
	modprobe --config /dev/null --show-depends `cat /sys/bus/pci/0000:00:1f.3/modalias`
?

> author:         Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker <mdsxyz123@yahoo.com>
> description:    I801 SMBus driver
> license:        GPL
> vermagic:       2.6.20-rc3 mod_unload PENTIUMM 4KSTACKS 
> depends:        i2c-core
> alias:          pci:v00008086d00002413sv*sd*bc*sc*i*
> alias:          pci:v00008086d00002423sv*sd*bc*sc*i*
> alias:          pci:v00008086d00002443sv*sd*bc*sc*i*
> alias:          pci:v00008086d00002483sv*sd*bc*sc*i*
> alias:          pci:v00008086d000024C3sv*sd*bc*sc*i*
> alias:          pci:v00008086d000024D3sv*sd*bc*sc*i*
> alias:          pci:v00008086d000025A4sv*sd*bc*sc*i*
> alias:          pci:v00008086d0000266Asv*sd*bc*sc*i*
> alias:          pci:v00008086d000027DAsv*sd*bc*sc*i*       <------- should match

Yeah, I would think so.  What does:
	cat /sys/bus/pci/0000:00:1f.3/modalias
show?

thanks,

greg k-h

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [i2c] Why to I2c drivers not autoload like other PCI devices?
  2007-01-04  5:51     ` Greg KH
@ 2007-01-04 16:54       ` Jean Delvare
  2007-01-04 17:54         ` Stephen Hemminger
  0 siblings, 1 reply; 8+ messages in thread
From: Jean Delvare @ 2007-01-04 16:54 UTC (permalink / raw)
  To: Stephen Hemminger; +Cc: Greg KH, i2c, linux-kernel

On Wed, 3 Jan 2007 21:51:28 -0800, Greg KH wrote:
> On Wed, Jan 03, 2007 at 05:29:16PM -0800, Stephen Hemminger wrote:
> > On Wed, 3 Jan 2007 16:56:00 -0800
> > Greg KH <greg@kroah.com> wrote:
> > 
> > > On Wed, Jan 03, 2007 at 04:50:20PM -0800, Stephen Hemminger wrote:
> > > > Is there some missing magic (udev rule?) that keeps i2c device modules
> > > > from loading? For example: the Intel i2c-i801 module ought to get loaded
> > > > automatically on boot up since it has a set of PCI id's that generate
> > > > the necessary module aliases. It would be better if I2C device's autoloaded
> > > > like other PCI devices.
> > > 
> > > No, it should autoload, if it has a MODULE_DEVICE_TABLE() in it.  In
> > > fact, the i2c-i801 autoloads on one of my machines just fine.  Are you
> > > sure your pci ids match properly?
> > > 
> > > thanks,
> > > 
> > > greg k-h
> > 
> > This laptop is running Ubuntu Edgy (6.10) and it doesn't autoload.
> > Everything works fine if I manually load the module with modprobe.
> > 
> > This device should match:
> > 
> > 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
> > 00: 86 80 da 27 01 00 80 02 02 00 05 0c 00 00 00 00
> > 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > 20: a1 18 00 00 00 00 00 00 00 00 00 00 cf 10 88 13
> > 30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00
> > 
> > This driver modinfo:
> > 
> > filename:       /lib/modules/2.6.20-rc3/kernel/drivers/i2c/busses/i2c-i801.ko
> 
> What does:
> 	modprobe --show-depends `cat /sys/bus/pci/0000:00:1f.3/modalias`
> show?

Greg really means:
	modprobe --show-depends `cat /sys/bus/pci/devices/0000:00:1f.3/modalias`
and same for the other commands below.

> 
> Is it different from:
> 	modprobe --config /dev/null --show-depends `cat /sys/bus/pci/0000:00:1f.3/modalias`
> ?
> 
> > author:         Frodo Looijaard <frodol@dds.nl>, Philip Edelbrock <phil@netroedge.com>, and Mark D. Studebaker <mdsxyz123@yahoo.com>
> > description:    I801 SMBus driver
> > license:        GPL
> > vermagic:       2.6.20-rc3 mod_unload PENTIUMM 4KSTACKS 
> > depends:        i2c-core
> > alias:          pci:v00008086d00002413sv*sd*bc*sc*i*
> > alias:          pci:v00008086d00002423sv*sd*bc*sc*i*
> > alias:          pci:v00008086d00002443sv*sd*bc*sc*i*
> > alias:          pci:v00008086d00002483sv*sd*bc*sc*i*
> > alias:          pci:v00008086d000024C3sv*sd*bc*sc*i*
> > alias:          pci:v00008086d000024D3sv*sd*bc*sc*i*
> > alias:          pci:v00008086d000025A4sv*sd*bc*sc*i*
> > alias:          pci:v00008086d0000266Asv*sd*bc*sc*i*
> > alias:          pci:v00008086d000027DAsv*sd*bc*sc*i*       <------- should match
> 
> Yeah, I would think so.  What does:
> 	cat /sys/bus/pci/0000:00:1f.3/modalias
> show?
> 
> thanks,
> 
> greg k-h
> 
> _______________________________________________
> i2c mailing list
> i2c@lm-sensors.org
> http://lists.lm-sensors.org/mailman/listinfo/i2c


-- 
Jean Delvare

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [i2c] Why to I2c drivers not autoload like other PCI devices?
  2007-01-04 16:54       ` [i2c] " Jean Delvare
@ 2007-01-04 17:54         ` Stephen Hemminger
  2007-01-04 19:32           ` Greg KH
  0 siblings, 1 reply; 8+ messages in thread
From: Stephen Hemminger @ 2007-01-04 17:54 UTC (permalink / raw)
  To: Jean Delvare; +Cc: Greg KH, i2c, linux-kernel

On Thu, 4 Jan 2007 17:54:12 +0100
Jean Delvare <khali@linux-fr.org> wrote:

> On Wed, 3 Jan 2007 21:51:28 -0800, Greg KH wrote:
> > On Wed, Jan 03, 2007 at 05:29:16PM -0800, Stephen Hemminger wrote:
> > > On Wed, 3 Jan 2007 16:56:00 -0800
> > > Greg KH <greg@kroah.com> wrote:
> > > 
> > > > On Wed, Jan 03, 2007 at 04:50:20PM -0800, Stephen Hemminger wrote:
> > > > > Is there some missing magic (udev rule?) that keeps i2c device modules
> > > > > from loading? For example: the Intel i2c-i801 module ought to get loaded
> > > > > automatically on boot up since it has a set of PCI id's that generate
> > > > > the necessary module aliases. It would be better if I2C device's autoloaded
> > > > > like other PCI devices.
> > > > 
> > > > No, it should autoload, if it has a MODULE_DEVICE_TABLE() in it.  In
> > > > fact, the i2c-i801 autoloads on one of my machines just fine.  Are you
> > > > sure your pci ids match properly?
> > > > 
> > > > thanks,
> > > > 
> > > > greg k-h
> > > 
> > > This laptop is running Ubuntu Edgy (6.10) and it doesn't autoload.
> > > Everything works fine if I manually load the module with modprobe.
> > > 
> > > This device should match:
> > > 
> > > 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
> > > 00: 86 80 da 27 01 00 80 02 02 00 05 0c 00 00 00 00
> > > 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > > 20: a1 18 00 00 00 00 00 00 00 00 00 00 cf 10 88 13
> > > 30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00
> > > 
> > > This driver modinfo:
> > > 
> > > filename:       /lib/modules/2.6.20-rc3/kernel/drivers/i2c/busses/i2c-i801.ko
> > 
> > What does:
> > 	modprobe --show-depends `cat /sys/bus/pci/0000:00:1f.3/modalias`
> > show? 
> 
> Greg really means:
> 	modprobe --show-depends `cat /sys/bus/pci/devices/0000:00:1f.3/modalias`
> and same for the other commands below.


Ahak
$ modprobe --show-depends `cat /sys/bus/pci/devices/0000:00:1f.3/modalias`
WARNING: Not loading blacklisted module i2c_i801
FATAL: Module pci:v00008086d000027DAsv000010CFsd00001388bc0Csc05i00 not found.

And the blacklist entry is:

# causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
blacklist i2c_i801

Looks like Ubuntu decided to wallpaper over a problem rather than fixing it

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [i2c] Why to I2c drivers not autoload like other PCI devices?
  2007-01-04 17:54         ` Stephen Hemminger
@ 2007-01-04 19:32           ` Greg KH
  2007-01-04 20:47             ` Jean Delvare
  0 siblings, 1 reply; 8+ messages in thread
From: Greg KH @ 2007-01-04 19:32 UTC (permalink / raw)
  To: Stephen Hemminger; +Cc: Jean Delvare, i2c, linux-kernel

On Thu, Jan 04, 2007 at 09:54:12AM -0800, Stephen Hemminger wrote:
> On Thu, 4 Jan 2007 17:54:12 +0100
> Jean Delvare <khali@linux-fr.org> wrote:
> 
> > On Wed, 3 Jan 2007 21:51:28 -0800, Greg KH wrote:
> > > On Wed, Jan 03, 2007 at 05:29:16PM -0800, Stephen Hemminger wrote:
> > > > On Wed, 3 Jan 2007 16:56:00 -0800
> > > > Greg KH <greg@kroah.com> wrote:
> > > > 
> > > > > On Wed, Jan 03, 2007 at 04:50:20PM -0800, Stephen Hemminger wrote:
> > > > > > Is there some missing magic (udev rule?) that keeps i2c device modules
> > > > > > from loading? For example: the Intel i2c-i801 module ought to get loaded
> > > > > > automatically on boot up since it has a set of PCI id's that generate
> > > > > > the necessary module aliases. It would be better if I2C device's autoloaded
> > > > > > like other PCI devices.
> > > > > 
> > > > > No, it should autoload, if it has a MODULE_DEVICE_TABLE() in it.  In
> > > > > fact, the i2c-i801 autoloads on one of my machines just fine.  Are you
> > > > > sure your pci ids match properly?
> > > > > 
> > > > > thanks,
> > > > > 
> > > > > greg k-h
> > > > 
> > > > This laptop is running Ubuntu Edgy (6.10) and it doesn't autoload.
> > > > Everything works fine if I manually load the module with modprobe.
> > > > 
> > > > This device should match:
> > > > 
> > > > 00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
> > > > 00: 86 80 da 27 01 00 80 02 02 00 05 0c 00 00 00 00
> > > > 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> > > > 20: a1 18 00 00 00 00 00 00 00 00 00 00 cf 10 88 13
> > > > 30: 00 00 00 00 00 00 00 00 00 00 00 00 0b 02 00 00
> > > > 
> > > > This driver modinfo:
> > > > 
> > > > filename:       /lib/modules/2.6.20-rc3/kernel/drivers/i2c/busses/i2c-i801.ko
> > > 
> > > What does:
> > > 	modprobe --show-depends `cat /sys/bus/pci/0000:00:1f.3/modalias`
> > > show? 
> > 
> > Greg really means:
> > 	modprobe --show-depends `cat /sys/bus/pci/devices/0000:00:1f.3/modalias`
> > and same for the other commands below.
> 
> 
> Ahak
> $ modprobe --show-depends `cat /sys/bus/pci/devices/0000:00:1f.3/modalias`
> WARNING: Not loading blacklisted module i2c_i801
> FATAL: Module pci:v00008086d000027DAsv000010CFsd00001388bc0Csc05i00 not found.
> 
> And the blacklist entry is:
> 
> # causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
> blacklist i2c_i801
> 
> Looks like Ubuntu decided to wallpaper over a problem rather than fixing it

I figured it was something like that, not a kernel issue at all :)

good luck convincing ubuntu to remove the blacklist.

greg k-h

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [i2c] Why to I2c drivers not autoload like other PCI devices?
  2007-01-04 19:32           ` Greg KH
@ 2007-01-04 20:47             ` Jean Delvare
  0 siblings, 0 replies; 8+ messages in thread
From: Jean Delvare @ 2007-01-04 20:47 UTC (permalink / raw)
  To: Greg KH; +Cc: Stephen Hemminger, i2c, linux-kernel

Hi Greg, Stephen,

On Thu, 4 Jan 2007 11:32:20 -0800, Greg KH wrote:
> On Thu, Jan 04, 2007 at 09:54:12AM -0800, Stephen Hemminger wrote:
> > Ahak
> > $ modprobe --show-depends `cat /sys/bus/pci/devices/0000:00:1f.3/modalias`
> > WARNING: Not loading blacklisted module i2c_i801
> > FATAL: Module pci:v00008086d000027DAsv000010CFsd00001388bc0Csc05i00 not found.
> > 
> > And the blacklist entry is:
> > 
> > # causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
> > blacklist i2c_i801
> > 
> > Looks like Ubuntu decided to wallpaper over a problem rather than fixing it
> 
> I figured it was something like that, not a kernel issue at all :)
> 
> good luck convincing ubuntu to remove the blacklist.

This is the same bug as:
http://bugzilla.kernel.org/show_bug.cgi?id=6449

Which should be "fixed" since 2.6.17 (and late 2.6.16.y), because the
SMBus unhiding quirk which this laptop needs was disabled when the
kernel is built with suspend support. The real fix was provided by Alan
Cox and will be in 2.6.20 if anyone could try the RCs and report.

So the blacklisting should no longer be necessary for any version of
Ubuntu which comes with a kernel >= 2.6.16.18.

-- 
Jean Delvare

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2007-01-04 20:47 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-01-04  0:50 Why to I2c drivers not autoload like other PCI devices? Stephen Hemminger
2007-01-04  0:56 ` Greg KH
2007-01-04  1:29   ` Stephen Hemminger
2007-01-04  5:51     ` Greg KH
2007-01-04 16:54       ` [i2c] " Jean Delvare
2007-01-04 17:54         ` Stephen Hemminger
2007-01-04 19:32           ` Greg KH
2007-01-04 20:47             ` Jean Delvare

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