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* [PATCH 00/18] MMC: OMAP: Sync MMC OMAP driver with mainline tree
@ 2008-03-14 19:35 Carlos Aguiar
  2008-03-24 12:26 ` Pierre Ossman
  0 siblings, 1 reply; 29+ messages in thread
From: Carlos Aguiar @ 2008-03-14 19:35 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

Hi Pierre, Tony and folks,

The new version of the patch series that follows is a synchronization
of MMC OMAP driver from Linux-OMAP tree into mainline tree.

Improvements and corrections are based on comments from Pierre Ossman and 
Roel Kluin, from LKML.

Just to remind you, basically it brings MMC multislot support for OMAP boards 
with one slot (like H2 1611, H3 1710) or two slots (like H4 2420 and N800).
Others boards supported by such feature are: N770, Siemens SX1 and Apollon.

BR,

Carlos.

-- 
Carlos Eduardo Aguiar
Nokia Institute of Technology - INdT
Open Source Mobile Research Center - OSMRC - Manaus
Core Team
Phone: +55 92 2126-1079
Mobile: +55 92 8127-1797
E-mail: carlos.aguiar@indt.org.br


^ permalink raw reply	[flat|nested] 29+ messages in thread
* [PATCH 05/18] MMC: OMAP: Introduce new multislot structure and change driver to use it
@ 2008-03-14 19:36 Carlos Aguiar
  2008-03-24 12:13 ` Pierre Ossman
  0 siblings, 1 reply; 29+ messages in thread
From: Carlos Aguiar @ 2008-03-14 19:36 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

From: Juha Yrjola <juha.yrjola@solidboot.com>

Introduce new MMC multislot structure and change driver to use it.

Note that MMC clocking is now enabled in mmc_omap_select_slot()
and disabled in mmc_omap_release_slot().

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/mmc/host/omap.c         |  407 +++++++++++++++++++++++++++++----------
 include/asm-arm/arch-omap/mmc.h |    2 +
 2 files changed, 305 insertions(+), 104 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 6c43058..05e7650 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -32,6 +32,7 @@
 #include <asm/mach-types.h>
 
 #include <asm/arch/board.h>
+#include <asm/arch/mmc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/dma.h>
 #include <asm/arch/mux.h>
@@ -95,6 +96,22 @@
  * when the cover switch is open */
 #define OMAP_MMC_SWITCH_POLL_DELAY	500
 
+struct mmc_omap_host;
+
+struct mmc_omap_slot {
+	int			id;
+	unsigned int		vdd;
+	u16			saved_con;
+	u16			bus_mode;
+	unsigned int		fclk_freq;
+	unsigned		powered:1;
+
+	struct mmc_request      *mrq;
+	struct mmc_omap_host    *host;
+	struct mmc_host		*mmc;
+	struct omap_mmc_slot_data *pdata;
+};
+
 struct mmc_omap_host {
 	int			initialized;
 	int			suspended;
@@ -129,13 +146,98 @@ struct mmc_omap_host {
 	unsigned		dma_len;
 
 	short			power_pin;
-	short			wp_pin;
 
-	struct work_struct	switch_work;
-	struct timer_list	switch_timer;
-	int			switch_last_state;
+	struct mmc_omap_slot    *slots[OMAP_MMC_MAX_SLOTS];
+	struct mmc_omap_slot    *current_slot;
+	spinlock_t              slot_lock;
+	wait_queue_head_t       slot_wq;
+	int                     nr_slots;
+
+	struct omap_mmc_platform_data *pdata;
 };
 
+static void mmc_omap_select_slot(struct mmc_omap_slot *slot, int claimed)
+{
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+
+	if (claimed)
+		goto no_claim;
+	spin_lock_irqsave(&host->slot_lock, flags);
+	while (host->mmc != NULL) {
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		wait_event(host->slot_wq, host->mmc == NULL);
+		spin_lock_irqsave(&host->slot_lock, flags);
+	}
+	host->mmc = slot->mmc;
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+no_claim:
+	clk_enable(host->fclk);
+	if (host->current_slot != slot) {
+		if (host->pdata->switch_slot != NULL)
+			host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id);
+		host->current_slot = slot;
+	}
+
+	/* Doing the dummy read here seems to work around some bug
+	 * at least in OMAP24xx silicon where the command would not
+	 * start after writing the CMD register. Sigh. */
+	OMAP_MMC_READ(host, CON);
+
+	OMAP_MMC_WRITE(host, CON, slot->saved_con);
+}
+
+static void mmc_omap_start_request(struct mmc_omap_host *host,
+				   struct mmc_request *req);
+
+static void mmc_omap_release_slot(struct mmc_omap_slot *slot)
+{
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+	int i;
+
+	BUG_ON(slot == NULL || host->mmc == NULL);
+	clk_disable(host->fclk);
+
+	spin_lock_irqsave(&host->slot_lock, flags);
+	/* Check for any pending requests */
+	for (i = 0; i < host->nr_slots; i++) {
+		struct mmc_omap_slot *new_slot;
+		struct mmc_request *rq;
+
+		if (host->slots[i] == NULL || host->slots[i]->mrq == NULL)
+			continue;
+
+		new_slot = host->slots[i];
+		/* The current slot should not have a request in queue */
+		BUG_ON(new_slot == host->current_slot);
+
+		host->mmc = new_slot->mmc;
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		mmc_omap_select_slot(new_slot, 1);
+		rq = new_slot->mrq;
+		new_slot->mrq = NULL;
+		mmc_omap_start_request(host, rq);
+		return;
+	}
+
+	host->mmc = NULL;
+	wake_up(&host->slot_wq);
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+}
+
+static ssize_t
+mmc_omap_show_slot_name(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+
+	return sprintf(buf, "%s\n", slot->pdata->name);
+}
+
+static DEVICE_ATTR(slot_name, S_IRUGO, mmc_omap_show_slot_name, NULL);
+
 static void
 mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 {
@@ -180,7 +282,7 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 
 	cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
 
-	if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
+	if (host->current_slot->bus_mode == MMC_BUSMODE_OPENDRAIN)
 		cmdreg |= 1 << 6;
 
 	if (cmd->flags & MMC_RSP_BUSY)
@@ -189,8 +291,6 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 	if (host->data && !(host->data->flags & MMC_DATA_WRITE))
 		cmdreg |= 1 << 15;
 
-	clk_enable(host->fclk);
-
 	OMAP_MMC_WRITE(host, CTO, 200);
 	OMAP_MMC_WRITE(host, ARGL, cmd->arg & 0xffff);
 	OMAP_MMC_WRITE(host, ARGH, cmd->arg >> 16);
@@ -442,6 +542,8 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 		if (status & OMAP_MMC_STAT_CMD_TOUT) {
 			/* Timeouts are routine with some commands */
 			if (host->cmd) {
+				struct mmc_omap_slot *slot =
+					host->current_slot;
 				dev_err(mmc_dev(host->mmc),
 					"command timeout, CMD %d\n",
 					host->cmd->opcode);
@@ -747,11 +849,10 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
 	}
 }
 
-static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+static void mmc_omap_start_request(struct mmc_omap_host *host,
+				   struct mmc_request *req)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
-
-	WARN_ON(host->mrq != NULL);
+	BUG_ON(host->mrq != NULL);
 
 	host->mrq = req;
 
@@ -760,6 +861,26 @@ static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
 	mmc_omap_start_command(host, req->cmd);
 	if (host->dma_in_use)
 		omap_start_dma(host->dma_ch);
+	BUG_ON(irqs_disabled());
+}
+
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+{
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->slot_lock, flags);
+	if (host->mmc != NULL) {
+		BUG_ON(slot->mrq != NULL);
+		slot->mrq = req;
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		return;
+	} else
+		host->mmc = mmc;
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+	mmc_omap_select_slot(slot, 1);
+	mmc_omap_start_request(host, req);
 }
 
 static void innovator_fpga_socket_power(int on)
@@ -813,7 +934,8 @@ static void mmc_omap_power(struct mmc_omap_host *host, int on)
 
 static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+	struct mmc_omap_host *host = slot->host;
 	int func_clk_rate = clk_get_rate(host->fclk);
 	int dsor;
 
@@ -830,6 +952,8 @@ static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 	if (dsor > 250)
 		dsor = 250;
 
+	slot->fclk_freq = func_clk_rate / dsor;
+
 	if (ios->bus_width == MMC_BUS_WIDTH_4)
 		dsor |= 1 << 15;
 
@@ -838,9 +962,9 @@ static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 
 static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
-	int dsor;
-	int i;
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+	struct mmc_omap_host *host = slot->host;
+	int i, dsor;
 
 	dsor = mmc_omap_calc_divisor(mmc, ios);
 	host->bus_mode = ios->bus_mode;
@@ -880,9 +1004,11 @@ static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 static int mmc_omap_get_ro(struct mmc_host *mmc)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
 
-	return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+	if (slot->pdata->get_ro != NULL)
+		return slot->pdata->get_ro(mmc_dev(mmc), slot->id);
+	return 0;
 }
 
 static const struct mmc_host_ops mmc_omap_ops = {
@@ -891,19 +1017,103 @@ static const struct mmc_host_ops mmc_omap_ops = {
 	.get_ro		= mmc_omap_get_ro,
 };
 
-static int __init mmc_omap_probe(struct platform_device *pdev)
+static int __init mmc_omap_new_slot(struct mmc_omap_host *host, int id)
 {
-	struct omap_mmc_conf *minfo = pdev->dev.platform_data;
+	struct mmc_omap_slot *slot = NULL;
 	struct mmc_host *mmc;
+	int r;
+
+	mmc = mmc_alloc_host(sizeof(struct mmc_omap_slot), host->dev);
+	if (mmc == NULL)
+		return -ENOMEM;
+
+	slot = mmc_priv(mmc);
+	slot->host = host;
+	slot->mmc = mmc;
+	slot->id = id;
+	slot->pdata = &host->pdata->slots[id];
+
+	host->slots[id] = slot;
+
+	mmc->caps = MMC_CAP_MULTIWRITE;
+	if (host->pdata->conf.wire4)
+		mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+	mmc->ops = &mmc_omap_ops;
+	mmc->f_min = 400000;
+
+	if (cpu_class_is_omap2())
+		mmc->f_max = 48000000;
+	else
+		mmc->f_max = 24000000;
+	if (host->pdata->max_freq)
+		mmc->f_max = min(host->pdata->max_freq, mmc->f_max);
+	mmc->ocr_avail = slot->pdata->ocr_mask;
+
+	/* Use scatterlist DMA to reduce per-transfer costs.
+	 * NOTE max_seg_size assumption that small blocks aren't
+	 * normally used (except e.g. for reading SD registers).
+	 */
+	mmc->max_phys_segs = 32;
+	mmc->max_hw_segs = 32;
+	mmc->max_blk_size = 2048;	/* BLEN is 11 bits (+1) */
+	mmc->max_blk_count = 2048;	/* NBLK is 11 bits (+1) */
+	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+	mmc->max_seg_size = mmc->max_req_size;
+
+	r = mmc_add_host(mmc);
+	if (r < 0)
+		goto err_remove_host;
+
+	if (slot->pdata->name != NULL) {
+		r = device_create_file(&mmc->class_dev,
+					&dev_attr_slot_name);
+		if (r < 0)
+			goto err_remove_host;
+	}
+
+	if (slot->pdata->get_ro != NULL) {
+		r = device_create_file(&mmc->class_dev,
+					&dev_attr_ro);
+	}
+
+	return 0;
+
+err_remove_host:
+	mmc_remove_host(mmc);
+	mmc_free_host(mmc);
+	return r;
+}
+
+static void mmc_omap_remove_slot(struct mmc_omap_slot *slot)
+{
+	struct mmc_host *mmc = slot->mmc;
+
+	if (slot->pdata->name != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_slot_name);
+	if (slot->pdata->get_ro != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_ro);
+
+	mmc_remove_host(mmc);
+	mmc_free_host(mmc);
+}
+
+static int __init mmc_omap_probe(struct platform_device *pdev)
+{
+	struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
 	struct mmc_omap_host *host = NULL;
 	struct resource *res;
-	int ret = 0;
+	int i, ret = 0;
 	int irq;
 
-	if (minfo == NULL) {
+	if (pdata == NULL) {
 		dev_err(&pdev->dev, "platform data missing\n");
 		return -ENXIO;
 	}
+	if (pdata->nr_slots == 0) {
+		dev_err(&pdev->dev, "no slots\n");
+		return -ENXIO;
+	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	irq = platform_get_irq(pdev, 0);
@@ -911,28 +1121,39 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 		return -ENXIO;
 
 	res = request_mem_region(res->start, res->end - res->start + 1,
-			         pdev->name);
+				 pdev->name);
 	if (res == NULL)
 		return -EBUSY;
 
-	mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
-	if (mmc == NULL) {
+	host = kzalloc(sizeof(struct mmc_omap_host), GFP_KERNEL);
+	if (host == NULL) {
 		ret = -ENOMEM;
 		goto err_free_mem_region;
 	}
 
-	host = mmc_priv(mmc);
-	host->mmc = mmc;
-
 	spin_lock_init(&host->dma_lock);
 	init_timer(&host->dma_timer);
+	spin_lock_init(&host->slot_lock);
+	init_waitqueue_head(&host->slot_wq);
+
 	host->dma_timer.function = mmc_omap_dma_timer;
 	host->dma_timer.data = (unsigned long) host;
 
+	host->pdata = pdata;
+	host->dev = &pdev->dev;
+	platform_set_drvdata(pdev, host);
+
 	host->id = pdev->id;
 	host->mem_res = res;
 	host->irq = irq;
 
+	host->use_dma = 1;
+	host->dma_ch = -1;
+
+	host->irq = irq;
+	host->phys_base = host->mem_res->start;
+	host->virt_base = (void __iomem *) IO_ADDRESS(host->phys_base);
+
 	if (cpu_is_omap24xx()) {
 		host->iclk = clk_get(&pdev->dev, "mmc_ick");
 		if (IS_ERR(host->iclk))
@@ -950,70 +1171,34 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 		goto err_free_iclk;
 	}
 
-	/* REVISIT:
-	 * Also, use minfo->cover to decide how to manage
-	 * the card detect sensing.
-	 */
-	host->power_pin = minfo->power_pin;
-	host->wp_pin = minfo->wp_pin;
-	host->use_dma = 1;
-	host->dma_ch = -1;
-
-	host->irq = irq;
-	host->phys_base = host->mem_res->start;
-	host->virt_base = (void __iomem *) IO_ADDRESS(host->phys_base);
-
-	mmc->ops = &mmc_omap_ops;
-	mmc->f_min = 400000;
-	mmc->f_max = 24000000;
-	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-	mmc->caps = MMC_CAP_MULTIWRITE;
+	ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
+	if (ret)
+		goto err_free_fclk;
 
-	if (minfo->wire4)
-		 mmc->caps |= MMC_CAP_4_BIT_DATA;
+	if (pdata->init != NULL) {
+		ret = pdata->init(&pdev->dev);
+		if (ret < 0)
+			goto err_free_irq;
+	}
 
-	/* Use scatterlist DMA to reduce per-transfer costs.
-	 * NOTE max_seg_size assumption that small blocks aren't
-	 * normally used (except e.g. for reading SD registers).
-	 */
-	mmc->max_phys_segs = 32;
-	mmc->max_hw_segs = 32;
-	mmc->max_blk_size = 2048;	/* BLEN is 11 bits (+1) */
-	mmc->max_blk_count = 2048;	/* NBLK is 11 bits (+1) */
-	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
-	mmc->max_seg_size = mmc->max_req_size;
+	host->nr_slots = pdata->nr_slots;
+	for (i = 0; i < pdata->nr_slots; i++) {
+		ret = mmc_omap_new_slot(host, i);
+		if (ret < 0) {
+			while (--i >= 0)
+				mmc_omap_remove_slot(host->slots[i]);
 
-	if (host->power_pin >= 0) {
-		if ((ret = omap_request_gpio(host->power_pin)) != 0) {
-			dev_err(mmc_dev(host->mmc),
-				"Unable to get GPIO pin for MMC power\n");
-			goto err_free_fclk;
+			goto err_plat_cleanup;
 		}
-		omap_set_gpio_direction(host->power_pin, 0);
 	}
 
-	ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
-	if (ret)
-		goto err_free_power_gpio;
-
-	host->dev = &pdev->dev;
-	platform_set_drvdata(pdev, host);
-
-	mmc_add_host(mmc);
-
 	return 0;
 
-	/* FIXME: Free other resources too. */
-	if (host) {
-		if (host->iclk && !IS_ERR(host->iclk))
-			clk_put(host->iclk);
-		if (host->fclk && !IS_ERR(host->fclk))
-			clk_put(host->fclk);
-		mmc_free_host(host->mmc);
-	}
-err_free_power_gpio:
-	if (host->power_pin >= 0)
-		omap_free_gpio(host->power_pin);
+err_plat_cleanup:
+	if (pdata->cleanup)
+		pdata->cleanup(&pdev->dev);
+err_free_irq:
+	free_irq(host->irq, host);
 err_free_fclk:
 	clk_put(host->fclk);
 err_free_iclk:
@@ -1022,7 +1207,7 @@ err_free_iclk:
 		clk_put(host->iclk);
 	}
 err_free_mmc_host:
-	mmc_free_host(host->mmc);
+	kfree(host);
 err_free_mem_region:
 	release_mem_region(res->start, res->end - res->start + 1);
 	return ret;
@@ -1031,16 +1216,18 @@ err_free_mem_region:
 static int mmc_omap_remove(struct platform_device *pdev)
 {
 	struct mmc_omap_host *host = platform_get_drvdata(pdev);
+	int i;
 
 	platform_set_drvdata(pdev, NULL);
 
 	BUG_ON(host == NULL);
 
-	mmc_remove_host(host->mmc);
-	free_irq(host->irq, host);
+	for (i = 0; i < host->nr_slots; i++)
+		mmc_omap_remove_slot(host->slots[i]);
+
+	if (host->pdata->cleanup)
+		host->pdata->cleanup(&pdev->dev);
 
-	if (host->power_pin >= 0)
-		omap_free_gpio(host->power_pin);
 	if (host->iclk && !IS_ERR(host->iclk))
 		clk_put(host->iclk);
 	if (host->fclk && !IS_ERR(host->fclk))
@@ -1049,7 +1236,7 @@ static int mmc_omap_remove(struct platform_device *pdev)
 	release_mem_region(pdev->resource[0].start,
 			   pdev->resource[0].end - pdev->resource[0].start + 1);
 
-	mmc_free_host(host->mmc);
+	kfree(host);
 
 	return 0;
 }
@@ -1057,35 +1244,47 @@ static int mmc_omap_remove(struct platform_device *pdev)
 #ifdef CONFIG_PM
 static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
 {
-	int ret = 0;
+	int i, ret = 0;
 	struct mmc_omap_host *host = platform_get_drvdata(pdev);
 
-	if (host && host->suspended)
+	if (host == NULL || host->suspended)
 		return 0;
 
-	if (host) {
-		ret = mmc_suspend_host(host->mmc, mesg);
-		if (ret == 0)
-			host->suspended = 1;
+	for (i = 0; i < host->nr_slots; i++) {
+		struct mmc_omap_slot *slot;
+
+		slot = host->slots[i];
+		ret = mmc_suspend_host(slot->mmc, mesg);
+		if (ret < 0) {
+			while (--i >= 0) {
+				slot = host->slots[i];
+				mmc_resume_host(slot->mmc);
+			}
+			return ret;
+		}
 	}
-	return ret;
+	host->suspended = 1;
+	return 0;
 }
 
 static int mmc_omap_resume(struct platform_device *pdev)
 {
-	int ret = 0;
+	int i, ret = 0;
 	struct mmc_omap_host *host = platform_get_drvdata(pdev);
 
-	if (host && !host->suspended)
+	if (host == NULL || !host->suspended)
 		return 0;
 
-	if (host) {
-		ret = mmc_resume_host(host->mmc);
-		if (ret == 0)
-			host->suspended = 0;
-	}
+	for (i = 0; i < host->nr_slots; i++) {
+		struct mmc_omap_slot *slot;
+		slot = host->slots[i];
+		ret = mmc_resume_host(slot->mmc);
+		if (ret < 0)
+			return ret;
 
-	return ret;
+		host->suspended = 0;
+	}
+	return 0;
 }
 #else
 #define mmc_omap_suspend	NULL
diff --git a/include/asm-arm/arch-omap/mmc.h b/include/asm-arm/arch-omap/mmc.h
index b70e37b..c9588f4 100644
--- a/include/asm-arm/arch-omap/mmc.h
+++ b/include/asm-arm/arch-omap/mmc.h
@@ -18,6 +18,8 @@
 #define OMAP_MMC_MAX_SLOTS	2
 
 struct omap_mmc_platform_data {
+	struct omap_mmc_conf	conf;
+
 	unsigned enabled:1;
 	/* number of slots on board */
 	unsigned nr_slots:2;
-- 1.5.3.GIT


^ permalink raw reply	[flat|nested] 29+ messages in thread
* [PATCH 05/18] MMC: OMAP: Introduce new multislot structure and change driver to use it
@ 2008-01-28 19:07 Carlos Aguiar
  2008-01-29  1:17 ` Roel Kluin
  2008-02-07 17:37 ` Pierre Ossman
  0 siblings, 2 replies; 29+ messages in thread
From: Carlos Aguiar @ 2008-01-28 19:07 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

From: Juha Yrjola <juha.yrjola@solidboot.com>

Introduce new MMC multislot structure and change driver to use it.

Note that MMC clocking is now enabled in mmc_omap_select_slot()
and disabled in mmc_omap_release_slot().

Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Carlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/mmc/host/omap.c         |  424 +++++++++++++++++++++++++++++----------
 include/asm-arm/arch-omap/mmc.h |    2 +
 2 files changed, 322 insertions(+), 104 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 721955a..35719e7 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -33,6 +33,7 @@
 #include <asm/mach-types.h>
 
 #include <asm/arch/board.h>
+#include <asm/arch/mmc.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/dma.h>
 #include <asm/arch/mux.h>
@@ -96,6 +97,22 @@
  * when the cover switch is open */
 #define OMAP_MMC_SWITCH_POLL_DELAY	500
 
+struct mmc_omap_host;
+
+struct mmc_omap_slot {
+	int			id;
+	unsigned int		vdd;
+	u16			saved_con;
+	u16			bus_mode;
+	unsigned int		fclk_freq;
+	unsigned		powered:1;
+
+	struct mmc_request      *mrq;
+	struct mmc_omap_host    *host;
+	struct mmc_host		*mmc;
+	struct omap_mmc_slot_data *pdata;
+};
+
 struct mmc_omap_host {
 	int			initialized;
 	int			suspended;
@@ -130,13 +147,112 @@ struct mmc_omap_host {
 	unsigned		dma_len;
 
 	short			power_pin;
-	short			wp_pin;
 
-	struct work_struct	switch_work;
-	struct timer_list	switch_timer;
-	int			switch_last_state;
+	struct mmc_omap_slot    *slots[OMAP_MMC_MAX_SLOTS];
+	struct mmc_omap_slot    *current_slot;
+	spinlock_t              slot_lock;
+	wait_queue_head_t       slot_wq;
+	int                     nr_slots;
+
+	struct omap_mmc_platform_data *pdata;
 };
 
+static void mmc_omap_select_slot(struct mmc_omap_slot *slot, int claimed)
+{
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+
+	if (claimed)
+		goto no_claim;
+	spin_lock_irqsave(&host->slot_lock, flags);
+	while (host->mmc != NULL) {
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		wait_event(host->slot_wq, host->mmc == NULL);
+		spin_lock_irqsave(&host->slot_lock, flags);
+	}
+	host->mmc = slot->mmc;
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+no_claim:
+	clk_enable(host->fclk);
+	if (host->current_slot != slot) {
+		if (host->pdata->switch_slot != NULL)
+			host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id);
+		host->current_slot = slot;
+	}
+
+	/* Doing the dummy read here seems to work around some bug
+	 * at least in OMAP24xx silicon where the command would not
+	 * start after writing the CMD register. Sigh. */
+	OMAP_MMC_READ(host, CON);
+
+	OMAP_MMC_WRITE(host, CON, slot->saved_con);
+}
+
+static void mmc_omap_start_request(struct mmc_omap_host *host,
+				   struct mmc_request *req);
+
+static void mmc_omap_release_slot(struct mmc_omap_slot *slot)
+{
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+	int i;
+
+	BUG_ON(slot == NULL || host->mmc == NULL);
+	clk_disable(host->fclk);
+
+	spin_lock_irqsave(&host->slot_lock, flags);
+	/* Check for any pending requests */
+	for (i = 0; i < host->nr_slots; i++) {
+		struct mmc_omap_slot *new_slot;
+		struct mmc_request *rq;
+
+		if (host->slots[i] == NULL || host->slots[i]->mrq == NULL)
+			continue;
+
+		new_slot = host->slots[i];
+		/* The current slot should not have a request in queue */
+		BUG_ON(new_slot == host->current_slot);
+
+		host->mmc = new_slot->mmc;
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		mmc_omap_select_slot(new_slot, 1);
+		rq = new_slot->mrq;
+		new_slot->mrq = NULL;
+		mmc_omap_start_request(host, rq);
+		return;
+	}
+
+	host->mmc = NULL;
+	wake_up(&host->slot_wq);
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+}
+
+/* Access to the R/O switch is required for production testing
+ * purposes. */
+static ssize_t
+mmc_omap_show_ro(struct device *dev, struct device_attribute *attr, char *buf)
+{
+	struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+
+	return sprintf(buf, "%d\n", slot->pdata->get_ro(mmc_dev(mmc),
+							slot->id));
+}
+
+static DEVICE_ATTR(ro, S_IRUGO, mmc_omap_show_ro, NULL);
+
+static ssize_t
+mmc_omap_show_slot_name(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+
+	return sprintf(buf, "%s\n", slot->pdata->name);
+}
+
+static DEVICE_ATTR(slot_name, S_IRUGO, mmc_omap_show_slot_name, NULL);
+
 static void
 mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 {
@@ -181,7 +297,7 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 
 	cmdreg = cmd->opcode | (resptype << 8) | (cmdtype << 12);
 
-	if (host->bus_mode == MMC_BUSMODE_OPENDRAIN)
+	if (host->current_slot->bus_mode == MMC_BUSMODE_OPENDRAIN)
 		cmdreg |= 1 << 6;
 
 	if (cmd->flags & MMC_RSP_BUSY)
@@ -190,8 +306,6 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 	if (host->data && !(host->data->flags & MMC_DATA_WRITE))
 		cmdreg |= 1 << 15;
 
-	clk_enable(host->fclk);
-
 	OMAP_MMC_WRITE(host, CTO, 200);
 	OMAP_MMC_WRITE(host, ARGL, cmd->arg & 0xffff);
 	OMAP_MMC_WRITE(host, ARGH, cmd->arg >> 16);
@@ -443,6 +557,8 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 		if (status & OMAP_MMC_STAT_CMD_TOUT) {
 			/* Timeouts are routine with some commands */
 			if (host->cmd) {
+				struct mmc_omap_slot *slot =
+					host->current_slot;
 				if (host->cmd->opcode != MMC_ALL_SEND_CID &&
 						host->cmd->opcode !=
 						MMC_SEND_OP_COND &&
@@ -753,11 +869,10 @@ mmc_omap_prepare_data(struct mmc_omap_host *host, struct mmc_request *req)
 	}
 }
 
-static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+static void mmc_omap_start_request(struct mmc_omap_host *host,
+				   struct mmc_request *req)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
-
-	WARN_ON(host->mrq != NULL);
+	BUG_ON(host->mrq != NULL);
 
 	host->mrq = req;
 
@@ -766,6 +881,26 @@ static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
 	mmc_omap_start_command(host, req->cmd);
 	if (host->dma_in_use)
 		omap_start_dma(host->dma_ch);
+	BUG_ON(irqs_disabled());
+}
+
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
+{
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->slot_lock, flags);
+	if (host->mmc != NULL) {
+		BUG_ON(slot->mrq != NULL);
+		slot->mrq = req;
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		return;
+	} else
+		host->mmc = mmc;
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+	mmc_omap_select_slot(slot, 1);
+	mmc_omap_start_request(host, req);
 }
 
 static void innovator_fpga_socket_power(int on)
@@ -819,7 +954,8 @@ static void mmc_omap_power(struct mmc_omap_host *host, int on)
 
 static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+	struct mmc_omap_host *host = slot->host;
 	int func_clk_rate = clk_get_rate(host->fclk);
 	int dsor;
 
@@ -836,6 +972,8 @@ static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 	if (dsor > 250)
 		dsor = 250;
 
+	slot->fclk_freq = func_clk_rate / dsor;
+
 	if (ios->bus_width == MMC_BUS_WIDTH_4)
 		dsor |= 1 << 15;
 
@@ -844,9 +982,9 @@ static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 
 static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
-	int dsor;
-	int i;
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
+	struct mmc_omap_host *host = slot->host;
+	int i, dsor;
 
 	dsor = mmc_omap_calc_divisor(mmc, ios);
 	host->bus_mode = ios->bus_mode;
@@ -886,9 +1024,11 @@ static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 static int mmc_omap_get_ro(struct mmc_host *mmc)
 {
-	struct mmc_omap_host *host = mmc_priv(mmc);
+	struct mmc_omap_slot *slot = mmc_priv(mmc);
 
-	return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+	if (slot->pdata->get_ro != NULL)
+		return slot->pdata->get_ro(mmc_dev(mmc), slot->id);
+	return 0;
 }
 
 static const struct mmc_host_ops mmc_omap_ops = {
@@ -897,19 +1037,106 @@ static const struct mmc_host_ops mmc_omap_ops = {
 	.get_ro		= mmc_omap_get_ro,
 };
 
-static int __init mmc_omap_probe(struct platform_device *pdev)
+static int __init mmc_omap_new_slot(struct mmc_omap_host *host, int id)
 {
-	struct omap_mmc_conf *minfo = pdev->dev.platform_data;
+	struct mmc_omap_slot *slot = NULL;
 	struct mmc_host *mmc;
+	int r;
+
+	mmc = mmc_alloc_host(sizeof(struct mmc_omap_slot), host->dev);
+	if (mmc == NULL)
+		return -ENOMEM;
+
+	slot = mmc_priv(mmc);
+	slot->host = host;
+	slot->mmc = mmc;
+	slot->id = id;
+	slot->pdata = &host->pdata->slots[id];
+
+	host->slots[id] = slot;
+
+	mmc->caps = MMC_CAP_MULTIWRITE | MMC_CAP_MMC_HIGHSPEED |
+		    MMC_CAP_SD_HIGHSPEED;
+	if (host->pdata->conf.wire4)
+		mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+	mmc->ops = &mmc_omap_ops;
+	mmc->f_min = 400000;
+
+	if (cpu_class_is_omap2())
+		mmc->f_max = 48000000;
+	else
+		mmc->f_max = 24000000;
+	if (host->pdata->max_freq)
+		mmc->f_max = min(host->pdata->max_freq, mmc->f_max);
+	mmc->ocr_avail = slot->pdata->ocr_mask;
+
+	/* Use scatterlist DMA to reduce per-transfer costs.
+	 * NOTE max_seg_size assumption that small blocks aren't
+	 * normally used (except e.g. for reading SD registers).
+	 */
+	mmc->max_phys_segs = 32;
+	mmc->max_hw_segs = 32;
+	mmc->max_blk_size = 2048;	/* BLEN is 11 bits (+1) */
+	mmc->max_blk_count = 2048;	/* NBLK is 11 bits (+1) */
+	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+	mmc->max_seg_size = mmc->max_req_size;
+
+	r = mmc_add_host(mmc);
+	if (r < 0)
+		return r;
+
+	if (slot->pdata->name != NULL) {
+		r = device_create_file(&mmc->class_dev,
+					&dev_attr_slot_name);
+		if (r < 0)
+			goto err_remove_host;
+	}
+
+	if (slot->pdata->get_ro != NULL) {
+		r = device_create_file(&mmc->class_dev,
+					&dev_attr_ro);
+	}
+
+	return 0;
+
+err_remove_slot_name:
+	if (slot->pdata->name != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_ro);
+err_remove_host:
+	mmc_remove_host(mmc);
+	return r;
+}
+
+static void mmc_omap_remove_slot(struct mmc_omap_slot *slot)
+{
+	struct mmc_host *mmc = slot->mmc;
+
+	if (slot->pdata->name != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_slot_name);
+	if (slot->pdata->get_ro != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_ro);
+
+	mmc_remove_host(mmc);
+	mmc_free_host(mmc);
+}
+
+static int __init mmc_omap_probe(struct platform_device *pdev)
+{
+	struct omap_mmc_platform_data *pdata = pdev->dev.platform_data;
 	struct mmc_omap_host *host = NULL;
 	struct resource *res;
-	int ret = 0;
+	int i, ret = 0;
 	int irq;
 
-	if (minfo == NULL) {
+	if (pdata == NULL) {
 		dev_err(&pdev->dev, "platform data missing\n");
 		return -ENXIO;
 	}
+	if (pdata->nr_slots == 0) {
+		dev_err(&pdev->dev, "no slots\n");
+		return -ENXIO;
+	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	irq = platform_get_irq(pdev, 0);
@@ -917,28 +1144,39 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 		return -ENXIO;
 
 	res = request_mem_region(res->start, res->end - res->start + 1,
-			         pdev->name);
+				 pdev->name);
 	if (res == NULL)
 		return -EBUSY;
 
-	mmc = mmc_alloc_host(sizeof(struct mmc_omap_host), &pdev->dev);
-	if (mmc == NULL) {
+	host = kzalloc(sizeof(struct mmc_omap_host), GFP_KERNEL);
+	if (host == NULL) {
 		ret = -ENOMEM;
 		goto err_free_mem_region;
 	}
 
-	host = mmc_priv(mmc);
-	host->mmc = mmc;
-
 	spin_lock_init(&host->dma_lock);
 	init_timer(&host->dma_timer);
+	spin_lock_init(&host->slot_lock);
+	init_waitqueue_head(&host->slot_wq);
+
 	host->dma_timer.function = mmc_omap_dma_timer;
 	host->dma_timer.data = (unsigned long) host;
 
+	host->pdata = pdata;
+	host->dev = &pdev->dev;
+	platform_set_drvdata(pdev, host);
+
 	host->id = pdev->id;
 	host->mem_res = res;
 	host->irq = irq;
 
+	host->use_dma = 1;
+	host->dma_ch = -1;
+
+	host->irq = irq;
+	host->phys_base = host->mem_res->start;
+	host->virt_base = (void __iomem *) IO_ADDRESS(host->phys_base);
+
 	if (cpu_is_omap24xx()) {
 		host->iclk = clk_get(&pdev->dev, "mmc_ick");
 		if (IS_ERR(host->iclk))
@@ -956,70 +1194,34 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 		goto err_free_iclk;
 	}
 
-	/* REVISIT:
-	 * Also, use minfo->cover to decide how to manage
-	 * the card detect sensing.
-	 */
-	host->power_pin = minfo->power_pin;
-	host->wp_pin = minfo->wp_pin;
-	host->use_dma = 1;
-	host->dma_ch = -1;
-
-	host->irq = irq;
-	host->phys_base = host->mem_res->start;
-	host->virt_base = (void __iomem *) IO_ADDRESS(host->phys_base);
+	ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
+	if (ret)
+		goto err_free_fclk;
 
-	mmc->ops = &mmc_omap_ops;
-	mmc->f_min = 400000;
-	mmc->f_max = 24000000;
-	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-	mmc->caps = MMC_CAP_MULTIWRITE;
+	if (pdata->init != NULL) {
+		ret = pdata->init(&pdev->dev);
+		if (ret < 0)
+			goto err_free_irq;
+	}
 
-	if (minfo->wire4)
-		 mmc->caps |= MMC_CAP_4_BIT_DATA;
+	host->nr_slots = pdata->nr_slots;
+	for (i = 0; i < pdata->nr_slots; i++) {
+		ret = mmc_omap_new_slot(host, i);
+		if (ret < 0) {
+			while (--i >= 0)
+				mmc_omap_remove_slot(host->slots[i]);
 
-	/* Use scatterlist DMA to reduce per-transfer costs.
-	 * NOTE max_seg_size assumption that small blocks aren't
-	 * normally used (except e.g. for reading SD registers).
-	 */
-	mmc->max_phys_segs = 32;
-	mmc->max_hw_segs = 32;
-	mmc->max_blk_size = 2048;	/* BLEN is 11 bits (+1) */
-	mmc->max_blk_count = 2048;	/* NBLK is 11 bits (+1) */
-	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
-	mmc->max_seg_size = mmc->max_req_size;
-
-	if (host->power_pin >= 0) {
-		if ((ret = omap_request_gpio(host->power_pin)) != 0) {
-			dev_err(mmc_dev(host->mmc),
-				"Unable to get GPIO pin for MMC power\n");
-			goto err_free_fclk;
+			goto err_plat_cleanup;
 		}
-		omap_set_gpio_direction(host->power_pin, 0);
 	}
 
-	ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
-	if (ret)
-		goto err_free_power_gpio;
-
-	host->dev = &pdev->dev;
-	platform_set_drvdata(pdev, host);
-
-	mmc_add_host(mmc);
-
 	return 0;
 
-	/* FIXME: Free other resources too. */
-	if (host) {
-		if (host->iclk && !IS_ERR(host->iclk))
-			clk_put(host->iclk);
-		if (host->fclk && !IS_ERR(host->fclk))
-			clk_put(host->fclk);
-		mmc_free_host(host->mmc);
-	}
-err_free_power_gpio:
-	if (host->power_pin >= 0)
-		omap_free_gpio(host->power_pin);
+err_plat_cleanup:
+	if (pdata->cleanup)
+		pdata->cleanup(&pdev->dev);
+err_free_irq:
+	free_irq(host->irq, host);
 err_free_fclk:
 	clk_put(host->fclk);
 err_free_iclk:
@@ -1028,7 +1230,7 @@ err_free_iclk:
 		clk_put(host->iclk);
 	}
 err_free_mmc_host:
-	mmc_free_host(host->mmc);
+	kfree(host);
 err_free_mem_region:
 	release_mem_region(res->start, res->end - res->start + 1);
 	return ret;
@@ -1037,16 +1239,18 @@ err_free_mem_region:
 static int mmc_omap_remove(struct platform_device *pdev)
 {
 	struct mmc_omap_host *host = platform_get_drvdata(pdev);
+	int i;
 
 	platform_set_drvdata(pdev, NULL);
 
 	BUG_ON(host == NULL);
 
-	mmc_remove_host(host->mmc);
-	free_irq(host->irq, host);
+	for (i = 0; i < host->nr_slots; i++)
+		mmc_omap_remove_slot(host->slots[i]);
+
+	if (host->pdata->cleanup)
+		host->pdata->cleanup(&pdev->dev);
 
-	if (host->power_pin >= 0)
-		omap_free_gpio(host->power_pin);
 	if (host->iclk && !IS_ERR(host->iclk))
 		clk_put(host->iclk);
 	if (host->fclk && !IS_ERR(host->fclk))
@@ -1055,7 +1259,7 @@ static int mmc_omap_remove(struct platform_device *pdev)
 	release_mem_region(pdev->resource[0].start,
 			   pdev->resource[0].end - pdev->resource[0].start + 1);
 
-	mmc_free_host(host->mmc);
+	kfree(host);
 
 	return 0;
 }
@@ -1063,35 +1267,47 @@ static int mmc_omap_remove(struct platform_device *pdev)
 #ifdef CONFIG_PM
 static int mmc_omap_suspend(struct platform_device *pdev, pm_message_t mesg)
 {
-	int ret = 0;
+	int i, ret = 0;
 	struct mmc_omap_host *host = platform_get_drvdata(pdev);
 
-	if (host && host->suspended)
+	if (host == NULL || host->suspended)
 		return 0;
 
-	if (host) {
-		ret = mmc_suspend_host(host->mmc, mesg);
-		if (ret == 0)
-			host->suspended = 1;
+	for (i = 0; i < host->nr_slots; i++) {
+		struct mmc_omap_slot *slot;
+
+		slot = host->slots[i];
+		ret = mmc_suspend_host(slot->mmc, mesg);
+		if (ret < 0) {
+			while (--i >= 0) {
+				slot = host->slots[i];
+				mmc_resume_host(slot->mmc);
+			}
+			return ret;
+		}
 	}
-	return ret;
+	host->suspended = 1;
+	return 0;
 }
 
 static int mmc_omap_resume(struct platform_device *pdev)
 {
-	int ret = 0;
+	int i, ret = 0;
 	struct mmc_omap_host *host = platform_get_drvdata(pdev);
 
-	if (host && !host->suspended)
+	if (host == NULL || !host->suspended)
 		return 0;
 
-	if (host) {
-		ret = mmc_resume_host(host->mmc);
-		if (ret == 0)
-			host->suspended = 0;
-	}
+	for (i = 0; i < host->nr_slots; i++) {
+		struct mmc_omap_slot *slot;
+		slot = host->slots[i];
+		ret = mmc_resume_host(slot->mmc);
+		if (ret < 0)
+			return ret;
 
-	return ret;
+		host->suspended = 0;
+	}
+	return 0;
 }
 #else
 #define mmc_omap_suspend	NULL
diff --git a/include/asm-arm/arch-omap/mmc.h b/include/asm-arm/arch-omap/mmc.h
index b70e37b..c9588f4 100644
--- a/include/asm-arm/arch-omap/mmc.h
+++ b/include/asm-arm/arch-omap/mmc.h
@@ -18,6 +18,8 @@
 #define OMAP_MMC_MAX_SLOTS	2
 
 struct omap_mmc_platform_data {
+	struct omap_mmc_conf	conf;
+
 	unsigned enabled:1;
 	/* number of slots on board */
 	unsigned nr_slots:2;
-- 1.5.3.GIT


^ permalink raw reply	[flat|nested] 29+ messages in thread
end of thread, other threads:[~2008-03-30 16:10 UTC | newest]

Thread overview: 29+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-03-14 19:35 [PATCH 00/18] MMC: OMAP: Sync MMC OMAP driver with mainline tree Carlos Aguiar
2008-03-24 12:26 ` Pierre Ossman
2008-03-26 20:08   ` Carlos Aguiar
2008-03-30 16:10     ` Pierre Ossman
2008-03-26 20:08   ` [PATCH 01/18] MMC: OMAP: Remove some opcodes from host driver Carlos Aguiar
2008-03-26 20:08   ` [PATCH 02/18] MMC: OMAP: Remove extra divisor increase Carlos Aguiar
2008-03-26 20:08   ` [PATCH 03/18] MMC: OMAP: Fix the BYTEBLOCK capability removal Carlos Aguiar
2008-03-26 20:08   ` [PATCH 04/18] MMC: OMAP: Remove cover switch handling to allow adding multislot support Carlos Aguiar
2008-03-26 20:08   ` [PATCH 05/18] MMC: OMAP: Introduce new multislot structure and change driver to use it Carlos Aguiar
2008-03-26 20:09   ` [PATCH 06/18] MMC: OMAP: Add back cover switch support Carlos Aguiar
2008-03-26 20:09   ` [PATCH 07/18] MMC: OMAP: New release dma and abort xfer functions Carlos Aguiar
2008-03-26 20:09   ` [PATCH 08/18] MMC: OMAP: Fix timeout calculation for MMC multislot support Carlos Aguiar
2008-03-26 20:09   ` [PATCH 09/18] MMC: OMAP: Power functions modified to " Carlos Aguiar
2008-03-26 20:09   ` [PATCH 10/18] MMC: OMAP: General cleanup for " Carlos Aguiar
2008-03-26 20:09   ` [PATCH 11/18] MMC: OMAP: Abort stuck commands Carlos Aguiar
2008-03-26 20:09   ` [PATCH 12/18] MMC: OMAP: Using setup_timer instead of init_timer Carlos Aguiar
2008-03-26 20:09   ` [PATCH 13/18] MMC: OMAP: Check the get_cover_state function pointer if not set Carlos Aguiar
2008-03-26 20:09   ` [PATCH 14/18] MMC: OMAP: Use tasklet instead of workqueue for cover switch notification Carlos Aguiar
2008-03-26 20:09   ` [PATCH 15/18] MMC: OMAP: Move failing command abortion to workqueue Carlos Aguiar
2008-03-26 20:09   ` [PATCH 16/18] MMC: OMAP: Lazy clock shutdown Carlos Aguiar
2008-03-26 20:09   ` [PATCH 17/18] MMC: OMAP: Start new commands from work queue instead of irq Carlos Aguiar
2008-03-26 20:10   ` [PATCH 18/18] MMC: OMAP: Do not busy wait for end of command for ever Carlos Aguiar
  -- strict thread matches above, loose matches on Subject: below --
2008-03-14 19:36 [PATCH 05/18] MMC: OMAP: Introduce new multislot structure and change driver to use it Carlos Aguiar
2008-03-24 12:13 ` Pierre Ossman
2008-01-28 19:07 Carlos Aguiar
2008-01-29  1:17 ` Roel Kluin
2008-02-07 17:37 ` Pierre Ossman
2008-03-05 20:54   ` Felipe Balbi
2008-03-06  6:34     ` Pierre Ossman

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