Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (26 commits)
  mmc: sdio_ops.c should #include "sdio_ops.h"
  mmc: proper prototypes for mmc_attach_*()
  mmc: make __mmc_release_bus() static
  sdhci: improve no card, no reset quirk
  MMC: OMAP: Do not busy wait for end of command for ever
  MMC: OMAP: Start new commands from work queue instead of irq
  MMC: OMAP: Lazy clock shutdown
  MMC: OMAP: Move failing command abortion to workqueue
  MMC: OMAP: Use tasklet instead of workqueue for cover switch notification
  MMC: OMAP: Check the get_cover_state function pointer if not set
  MMC: OMAP: Using setup_timer instead of init_timer
  MMC: OMAP: Abort stuck commands
  MMC: OMAP: General cleanup for MMC multislot support
  MMC: OMAP: Power functions modified to MMC multislot support
  MMC: OMAP: Fix timeout calculation for MMC multislot support
  MMC: OMAP: New release dma and abort xfer functions
  MMC: OMAP: Add back cover switch support
  MMC: OMAP: Introduce new multislot structure and change driver to use it
  MMC: OMAP: Remove cover switch handling to allow adding multislot support
  MMC: OMAP: Fix the BYTEBLOCK capability removal
  ...

9 files changed, 778 insertions, 382 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b96667448eb..01ced4c5a61 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -35,10 +35,6 @@
 #include "sd_ops.h"
 #include "sdio_ops.h"
 
-extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr);
-extern int mmc_attach_sd(struct mmc_host *host, u32 ocr);
-extern int mmc_attach_sdio(struct mmc_host *host, u32 ocr);
-
 static struct workqueue_struct *workqueue;
 
 /*
@@ -516,7 +512,7 @@ static void mmc_power_off(struct mmc_host *host)
 /*
  * Cleanup when the last reference to the bus operator is dropped.
  */
-void __mmc_release_bus(struct mmc_host *host)
+static void __mmc_release_bus(struct mmc_host *host)
 {
 	BUG_ON(!host);
 	BUG_ON(host->bus_refs);
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index cfa8e15b592..cdb332b7ded 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -46,6 +46,10 @@ void mmc_rescan(struct work_struct *work);
 void mmc_start_host(struct mmc_host *host);
 void mmc_stop_host(struct mmc_host *host);
 
+int mmc_attach_mmc(struct mmc_host *host, u32 ocr);
+int mmc_attach_sd(struct mmc_host *host, u32 ocr);
+int mmc_attach_sdio(struct mmc_host *host, u32 ocr);
+
 extern int use_spi_crc;
 
 #endif
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index c65d203a846..1d795c5379b 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -2,7 +2,7 @@
  *  linux/drivers/mmc/core/host.c
  *
  *  Copyright (C) 2003 Russell King, All Rights Reserved.
- *  Copyright (C) 2007 Pierre Ossman
+ *  Copyright (C) 2007-2008 Pierre Ossman
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -57,12 +57,25 @@ static DEFINE_SPINLOCK(mmc_host_lock);
  */
 struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 {
+	int err;
 	struct mmc_host *host;
 
+	if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
+		return NULL;
+
 	host = kzalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
 	if (!host)
 		return NULL;
 
+	spin_lock(&mmc_host_lock);
+	err = idr_get_new(&mmc_host_idr, host, &host->index);
+	spin_unlock(&mmc_host_lock);
+	if (err)
+		goto free;
+
+	snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
+		 "mmc%d", host->index);
+
 	host->parent = dev;
 	host->class_dev.parent = dev;
 	host->class_dev.class = &mmc_host_class;
@@ -85,6 +98,10 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 	host->max_blk_count = PAGE_CACHE_SIZE / 512;
 
 	return host;
+
+free:
+	kfree(host);
+	return NULL;
 }
 
 EXPORT_SYMBOL(mmc_alloc_host);
@@ -104,18 +121,6 @@ int mmc_add_host(struct mmc_host *host)
 	WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
 		!host->ops->enable_sdio_irq);
 
-	if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
-		return -ENOMEM;
-
-	spin_lock(&mmc_host_lock);
-	err = idr_get_new(&mmc_host_idr, host, &host->index);
-	spin_unlock(&mmc_host_lock);
-	if (err)
-		return err;
-
-	snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
-		 "mmc%d", host->index);
-
 	led_trigger_register_simple(host->class_dev.bus_id, &host->led);
 
 	err = device_add(&host->class_dev);
@@ -144,10 +149,6 @@ void mmc_remove_host(struct mmc_host *host)
 	device_del(&host->class_dev);
 
 	led_trigger_unregister_simple(host->led);
-
-	spin_lock(&mmc_host_lock);
-	idr_remove(&mmc_host_idr, host->index);
-	spin_unlock(&mmc_host_lock);
 }
 
 EXPORT_SYMBOL(mmc_remove_host);
@@ -160,6 +161,10 @@ EXPORT_SYMBOL(mmc_remove_host);
  */
 void mmc_free_host(struct mmc_host *host)
 {
+	spin_lock(&mmc_host_lock);
+	idr_remove(&mmc_host_idr, host->index);
+	spin_unlock(&mmc_host_lock);
+
 	put_device(&host->class_dev);
 }
 
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index 3bd3021f5e8..c292e124107 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -128,12 +128,12 @@ static int sdio_irq_thread(void *_host)
 			}
 		}
 
-		set_task_state(current, TASK_INTERRUPTIBLE);
+		set_current_state(TASK_INTERRUPTIBLE);
 		if (host->caps & MMC_CAP_SDIO_IRQ)
 			host->ops->enable_sdio_irq(host, 1);
 		if (!kthread_should_stop())
 			schedule_timeout(period);
-		set_task_state(current, TASK_RUNNING);
+		set_current_state(TASK_RUNNING);
 	} while (!kthread_should_stop());
 
 	if (host->caps & MMC_CAP_SDIO_IRQ)
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index e1fca588e38..c8fa095a448 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -17,6 +17,7 @@
 #include <linux/mmc/sdio.h>
 
 #include "core.h"
+#include "sdio_ops.h"
 
 int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 {
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 90c358b57d1..14759e9f42a 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>
@@ -93,9 +94,27 @@
 
 /* Specifies how often in millisecs to poll for card status changes
  * when the cover switch is open */
-#define OMAP_MMC_SWITCH_POLL_DELAY	500
-
-static int mmc_omap_enable_poll = 1;
+#define OMAP_MMC_COVER_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 tasklet_struct	cover_tasklet;
+	struct timer_list       cover_timer;
+	unsigned		cover_open;
+
+	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;
@@ -115,6 +134,15 @@ struct mmc_omap_host {
 	unsigned char		bus_mode;
 	unsigned char		hw_bus_mode;
 
+	struct work_struct	cmd_abort_work;
+	unsigned		abort:1;
+	struct timer_list	cmd_abort_timer;
+
+	struct work_struct      slot_release_work;
+	struct mmc_omap_slot    *next_slot;
+	struct work_struct      send_stop_work;
+	struct mmc_data		*stop_data;
+
 	unsigned int		sg_len;
 	int			sg_idx;
 	u16 *			buffer;
@@ -131,63 +159,178 @@ struct mmc_omap_host {
 	unsigned		dma_len;
 
 	short			power_pin;
-	short			wp_pin;
 
-	int			switch_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 timer_list       clk_timer;
+	spinlock_t		clk_lock;     /* for changing enabled state */
+	unsigned int            fclk_enabled:1;
+
+	struct omap_mmc_platform_data *pdata;
 };
 
-static inline int
-mmc_omap_cover_is_open(struct mmc_omap_host *host)
+void mmc_omap_fclk_offdelay(struct mmc_omap_slot *slot)
 {
-	if (host->switch_pin < 0)
-		return 0;
-	return omap_get_gpio_datain(host->switch_pin);
+	unsigned long tick_ns;
+
+	if (slot != NULL && slot->host->fclk_enabled && slot->fclk_freq > 0) {
+		tick_ns = (1000000000 + slot->fclk_freq - 1) / slot->fclk_freq;
+		ndelay(8 * tick_ns);
+	}
 }
 
-static ssize_t
-mmc_omap_show_cover_switch(struct device *dev,
-	struct device_attribute *attr, char *buf)
+void mmc_omap_fclk_enable(struct mmc_omap_host *host, unsigned int enable)
 {
-	struct mmc_omap_host *host = dev_get_drvdata(dev);
+	unsigned long flags;
 
-	return sprintf(buf, "%s\n", mmc_omap_cover_is_open(host) ? "open" :
-			"closed");
+	spin_lock_irqsave(&host->clk_lock, flags);
+	if (host->fclk_enabled != enable) {
+		host->fclk_enabled = enable;
+		if (enable)
+			clk_enable(host->fclk);
+		else
+			clk_disable(host->fclk);
+	}
+	spin_unlock_irqrestore(&host->clk_lock, flags);
 }
 
-static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL);
+static void mmc_omap_select_slot(struct mmc_omap_slot *slot, int claimed)
+{
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
 
-static ssize_t
-mmc_omap_show_enable_poll(struct device *dev,
-	struct device_attribute *attr, char *buf)
+	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:
+	del_timer(&host->clk_timer);
+	if (host->current_slot != slot || !claimed)
+		mmc_omap_fclk_offdelay(host->current_slot);
+
+	if (host->current_slot != slot) {
+		OMAP_MMC_WRITE(host, CON, slot->saved_con & 0xFC00);
+		if (host->pdata->switch_slot != NULL)
+			host->pdata->switch_slot(mmc_dev(slot->mmc), slot->id);
+		host->current_slot = slot;
+	}
+
+	if (claimed) {
+		mmc_omap_fclk_enable(host, 1);
+
+		/* 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);
+	} else
+		mmc_omap_fclk_enable(host, 0);
+}
+
+static void mmc_omap_start_request(struct mmc_omap_host *host,
+				   struct mmc_request *req);
+
+static void mmc_omap_slot_release_work(struct work_struct *work)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n", mmc_omap_enable_poll);
+	struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
+						  slot_release_work);
+	struct mmc_omap_slot *next_slot = host->next_slot;
+	struct mmc_request *rq;
+
+	host->next_slot = NULL;
+	mmc_omap_select_slot(next_slot, 1);
+
+	rq = next_slot->mrq;
+	next_slot->mrq = NULL;
+	mmc_omap_start_request(host, rq);
 }
 
-static ssize_t
-mmc_omap_store_enable_poll(struct device *dev,
-	struct device_attribute *attr, const char *buf,
-	size_t size)
+static void mmc_omap_release_slot(struct mmc_omap_slot *slot, int clk_enabled)
 {
-	int enable_poll;
+	struct mmc_omap_host *host = slot->host;
+	unsigned long flags;
+	int i;
+
+	BUG_ON(slot == NULL || host->mmc == NULL);
+
+	if (clk_enabled)
+		/* Keeps clock running for at least 8 cycles on valid freq */
+		mod_timer(&host->clk_timer, jiffies  + HZ/10);
+	else {
+		del_timer(&host->clk_timer);
+		mmc_omap_fclk_offdelay(slot);
+		mmc_omap_fclk_enable(host, 0);
+	}
 
-	if (sscanf(buf, "%10d", &enable_poll) != 1)
-		return -EINVAL;
+	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;
 
-	if (enable_poll != mmc_omap_enable_poll) {
-		struct mmc_omap_host *host = dev_get_drvdata(dev);
+		if (host->slots[i] == NULL || host->slots[i]->mrq == NULL)
+			continue;
 
-		mmc_omap_enable_poll = enable_poll;
-		if (enable_poll && host->switch_pin >= 0)
-			schedule_work(&host->switch_work);
+		BUG_ON(host->next_slot != NULL);
+		new_slot = host->slots[i];
+		/* The current slot should not have a request in queue */
+		BUG_ON(new_slot == host->current_slot);
+
+		host->next_slot = new_slot;
+		host->mmc = new_slot->mmc;
+		spin_unlock_irqrestore(&host->slot_lock, flags);
+		schedule_work(&host->slot_release_work);
+		return;
 	}
-	return size;
+
+	host->mmc = NULL;
+	wake_up(&host->slot_wq);
+	spin_unlock_irqrestore(&host->slot_lock, flags);
+}
+
+static inline
+int mmc_omap_cover_is_open(struct mmc_omap_slot *slot)
+{
+	if (slot->pdata->get_cover_state)
+		return slot->pdata->get_cover_state(mmc_dev(slot->mmc),
+						    slot->id);
+	return 0;
+}
+
+static ssize_t
+mmc_omap_show_cover_switch(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", mmc_omap_cover_is_open(slot) ? "open" :
+		       "closed");
 }
 
-static DEVICE_ATTR(enable_poll, 0664,
-		   mmc_omap_show_enable_poll, mmc_omap_store_enable_poll);
+static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, 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)
@@ -233,7 +376,7 @@ 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)
@@ -242,7 +385,7 @@ 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);
+	mod_timer(&host->cmd_abort_timer, jiffies + HZ/2);
 
 	OMAP_MMC_WRITE(host, CTO, 200);
 	OMAP_MMC_WRITE(host, ARGL, cmd->arg & 0xffff);
@@ -257,26 +400,46 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 }
 
 static void
+mmc_omap_release_dma(struct mmc_omap_host *host, struct mmc_data *data,
+		     int abort)
+{
+	enum dma_data_direction dma_data_dir;
+
+	BUG_ON(host->dma_ch < 0);
+	if (data->error)
+		omap_stop_dma(host->dma_ch);
+	/* Release DMA channel lazily */
+	mod_timer(&host->dma_timer, jiffies + HZ);
+	if (data->flags & MMC_DATA_WRITE)
+		dma_data_dir = DMA_TO_DEVICE;
+	else
+		dma_data_dir = DMA_FROM_DEVICE;
+	dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
+		     dma_data_dir);
+}
+
+static void mmc_omap_send_stop_work(struct work_struct *work)
+{
+	struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
+						  send_stop_work);
+	struct mmc_omap_slot *slot = host->current_slot;
+	struct mmc_data *data = host->stop_data;
+	unsigned long tick_ns;
+
+	tick_ns = (1000000000 + slot->fclk_freq - 1)/slot->fclk_freq;
+	ndelay(8*tick_ns);
+
+	mmc_omap_start_command(host, data->stop);
+}
+
+static void
 mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 {
-	if (host->dma_in_use) {
-		enum dma_data_direction dma_data_dir;
-
-		BUG_ON(host->dma_ch < 0);
-		if (data->error)
-			omap_stop_dma(host->dma_ch);
-		/* Release DMA channel lazily */
-		mod_timer(&host->dma_timer, jiffies + HZ);
-		if (data->flags & MMC_DATA_WRITE)
-			dma_data_dir = DMA_TO_DEVICE;
-		else
-			dma_data_dir = DMA_FROM_DEVICE;
-		dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
-			     dma_data_dir);
-	}
+	if (host->dma_in_use)
+		mmc_omap_release_dma(host, data, data->error);
+
 	host->data = NULL;
 	host->sg_len = 0;
-	clk_disable(host->fclk);
 
 	/* NOTE:  MMC layer will sometimes poll-wait CMD13 next, issuing
 	 * dozens of requests until the card finishes writing data.
@@ -284,12 +447,58 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 	 */
 
 	if (!data->stop) {
+		struct mmc_host *mmc;
+
 		host->mrq = NULL;
-		mmc_request_done(host->mmc, data->mrq);
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot, 1);
+		mmc_request_done(mmc, data->mrq);
 		return;
 	}
 
-	mmc_omap_start_command(host, data->stop);
+	host->stop_data = data;
+	schedule_work(&host->send_stop_work);
+}
+
+static void
+mmc_omap_send_abort(struct mmc_omap_host *host, int maxloops)
+{
+	struct mmc_omap_slot *slot = host->current_slot;
+	unsigned int restarts, passes, timeout;
+	u16 stat = 0;
+
+	/* Sending abort takes 80 clocks. Have some extra and round up */
+	timeout = (120*1000000 + slot->fclk_freq - 1)/slot->fclk_freq;
+	restarts = 0;
+	while (restarts < maxloops) {
+		OMAP_MMC_WRITE(host, STAT, 0xFFFF);
+		OMAP_MMC_WRITE(host, CMD, (3 << 12) | (1 << 7));
+
+		passes = 0;
+		while (passes < timeout) {
+			stat = OMAP_MMC_READ(host, STAT);
+			if (stat & OMAP_MMC_STAT_END_OF_CMD)
+				goto out;
+			udelay(1);
+			passes++;
+		}
+
+		restarts++;
+	}
+out:
+	OMAP_MMC_WRITE(host, STAT, stat);
+}
+
+static void
+mmc_omap_abort_xfer(struct mmc_omap_host *host, struct mmc_data *data)
+{
+	if (host->dma_in_use)
+		mmc_omap_release_dma(host, data, 1);
+
+	host->data = NULL;
+	host->sg_len = 0;
+
+	mmc_omap_send_abort(host, 10000);
 }
 
 static void
@@ -345,6 +554,8 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 {
 	host->cmd = NULL;
 
+	del_timer(&host->cmd_abort_timer);
+
 	if (cmd->flags & MMC_RSP_PRESENT) {
 		if (cmd->flags & MMC_RSP_136) {
 			/* response type 2 */
@@ -369,10 +580,66 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 	}
 
 	if (host->data == NULL || cmd->error) {
+		struct mmc_host *mmc;
+
+		if (host->data != NULL)
+			mmc_omap_abort_xfer(host, host->data);
 		host->mrq = NULL;
-		clk_disable(host->fclk);
-		mmc_request_done(host->mmc, cmd->mrq);
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot, 1);
+		mmc_request_done(mmc, cmd->mrq);
+	}
+}
+
+/*
+ * Abort stuck command. Can occur when card is removed while it is being
+ * read.
+ */
+static void mmc_omap_abort_command(struct work_struct *work)
+{
+	struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
+						  cmd_abort_work);
+	BUG_ON(!host->cmd);
+
+	dev_dbg(mmc_dev(host->mmc), "Aborting stuck command CMD%d\n",
+		host->cmd->opcode);
+
+	if (host->cmd->error == 0)
+		host->cmd->error = -ETIMEDOUT;
+
+	if (host->data == NULL) {
+		struct mmc_command *cmd;
+		struct mmc_host    *mmc;
+
+		cmd = host->cmd;
+		host->cmd = NULL;
+		mmc_omap_send_abort(host, 10000);
+
+		host->mrq = NULL;
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot, 1);
+		mmc_request_done(mmc, cmd->mrq);
+	} else
+		mmc_omap_cmd_done(host, host->cmd);
+
+	host->abort = 0;
+	enable_irq(host->irq);
+}
+
+static void
+mmc_omap_cmd_timer(unsigned long data)
+{
+	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->slot_lock, flags);
+	if (host->cmd != NULL && !host->abort) {
+		OMAP_MMC_WRITE(host, IE, 0);
+		disable_irq(host->irq);
+		host->abort = 1;
+		schedule_work(&host->cmd_abort_work);
 	}
+	spin_unlock_irqrestore(&host->slot_lock, flags);
 }
 
 /* PIO only */
@@ -388,6 +655,14 @@ mmc_omap_sg_to_buf(struct mmc_omap_host *host)
 		host->buffer_bytes_left = host->total_bytes_left;
 }
 
+static void
+mmc_omap_clk_timer(unsigned long data)
+{
+	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+
+	mmc_omap_fclk_enable(host, 0);
+}
+
 /* PIO only */
 static void
 mmc_omap_xfer_data(struct mmc_omap_host *host, int write)
@@ -436,11 +711,12 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 	u16 status;
 	int end_command;
 	int end_transfer;
-	int transfer_error;
+	int transfer_error, cmd_error;
 
 	if (host->cmd == NULL && host->data == NULL) {
 		status = OMAP_MMC_READ(host, STAT);
-		dev_info(mmc_dev(host->mmc),"spurious irq 0x%04x\n", status);
+		dev_info(mmc_dev(host->slots[0]->mmc),
+			 "Spurious IRQ 0x%04x\n", status);
 		if (status != 0) {
 			OMAP_MMC_WRITE(host, STAT, status);
 			OMAP_MMC_WRITE(host, IE, 0);
@@ -451,12 +727,19 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 	end_command = 0;
 	end_transfer = 0;
 	transfer_error = 0;
+	cmd_error = 0;
 
 	while ((status = OMAP_MMC_READ(host, STAT)) != 0) {
+		int cmd;
+
 		OMAP_MMC_WRITE(host, STAT, status);
+		if (host->cmd != NULL)
+			cmd = host->cmd->opcode;
+		else
+			cmd = -1;
 #ifdef CONFIG_MMC_DEBUG
 		dev_dbg(mmc_dev(host->mmc), "MMC IRQ %04x (CMD %d): ",
-			status, host->cmd != NULL ? host->cmd->opcode : -1);
+			status, cmd);
 		mmc_omap_report_irq(status);
 		printk("\n");
 #endif
@@ -468,12 +751,12 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 				mmc_omap_xfer_data(host, 1);
 		}
 
-		if (status & OMAP_MMC_STAT_END_OF_DATA) {
+		if (status & OMAP_MMC_STAT_END_OF_DATA)
 			end_transfer = 1;
-		}
 
 		if (status & OMAP_MMC_STAT_DATA_TOUT) {
-			dev_dbg(mmc_dev(host->mmc), "data timeout\n");
+			dev_dbg(mmc_dev(host->mmc), "data timeout (CMD%d)\n",
+				cmd);
 			if (host->data) {
 				host->data->error = -ETIMEDOUT;
 				transfer_error = 1;
@@ -495,17 +778,16 @@ 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) {
-				if (host->cmd->opcode != MMC_ALL_SEND_CID &&
-						host->cmd->opcode !=
-						MMC_SEND_OP_COND &&
-						host->cmd->opcode !=
-						MMC_APP_CMD &&
-						!mmc_omap_cover_is_open(host))
+				struct mmc_omap_slot *slot =
+					host->current_slot;
+				if (slot == NULL ||
+				    !mmc_omap_cover_is_open(slot))
 					dev_err(mmc_dev(host->mmc),
-						"command timeout, CMD %d\n",
-						host->cmd->opcode);
+						"command timeout (CMD%d)\n",
+						cmd);
 				host->cmd->error = -ETIMEDOUT;
 				end_command = 1;
+				cmd_error = 1;
 			}
 		}
 
@@ -513,9 +795,10 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 			if (host->cmd) {
 				dev_err(mmc_dev(host->mmc),
 					"command CRC error (CMD%d, arg 0x%08x)\n",
-					host->cmd->opcode, host->cmd->arg);
+					cmd, host->cmd->arg);
 				host->cmd->error = -EILSEQ;
 				end_command = 1;
+				cmd_error = 1;
 			} else
 				dev_err(mmc_dev(host->mmc),
 					"command CRC error without cmd?\n");
@@ -524,13 +807,13 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 		if (status & OMAP_MMC_STAT_CARD_ERR) {
 			dev_dbg(mmc_dev(host->mmc),
 				"ignoring card status error (CMD%d)\n",
-				host->cmd->opcode);
+				cmd);
 			end_command = 1;
 		}
 
 		/*
 		 * NOTE: On 1610 the END_OF_CMD may come too early when
-		 * starting a write 
+		 * starting a write
 		 */
 		if ((status & OMAP_MMC_STAT_END_OF_CMD) &&
 		    (!(status & OMAP_MMC_STAT_A_EMPTY))) {
@@ -538,63 +821,72 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 		}
 	}
 
-	if (end_command) {
+	if (cmd_error && host->data) {
+		del_timer(&host->cmd_abort_timer);
+		host->abort = 1;
+		OMAP_MMC_WRITE(host, IE, 0);
+		disable_irq(host->irq);
+		schedule_work(&host->cmd_abort_work);
+		return IRQ_HANDLED;
+	}
+
+	if (end_command)
 		mmc_omap_cmd_done(host, host->cmd);
+	if (host->data != NULL) {
+		if (transfer_error)
+			mmc_omap_xfer_done(host, host->data);
+		else if (end_transfer)
+			mmc_omap_end_of_data(host, host->data);
 	}
-	if (transfer_error)
-		mmc_omap_xfer_done(host, host->data);
-	else if (end_transfer)
-		mmc_omap_end_of_data(host, host->data);
 
 	return IRQ_HANDLED;
 }
 
-static irqreturn_t mmc_omap_switch_irq(int irq, void *dev_id)
+void omap_mmc_notify_cover_event(struct device *dev, int num, int is_closed)
 {
-	struct mmc_omap_host *host = (struct mmc_omap_host *) dev_id;
+	int cover_open;
+	struct mmc_omap_host *host = dev_get_drvdata(dev);
+	struct mmc_omap_slot *slot = host->slots[num];
 
-	schedule_work(&host->switch_work);
+	BUG_ON(num >= host->nr_slots);
 
-	return IRQ_HANDLED;
+	/* Other subsystems can call in here before we're initialised. */
+	if (host->nr_slots == 0 || !host->slots[num])
+		return;
+
+	cover_open = mmc_omap_cover_is_open(slot);
+	if (cover_open != slot->cover_open) {
+		slot->cover_open = cover_open;
+		sysfs_notify(&slot->mmc->class_dev.kobj, NULL, "cover_switch");
+	}
+
+	tasklet_hi_schedule(&slot->cover_tasklet);
 }
 
-static void mmc_omap_switch_timer(unsigned long arg)
+static void mmc_omap_cover_timer(unsigned long arg)
 {
-	struct mmc_omap_host *host = (struct mmc_omap_host *) arg;
-
-	schedule_work(&host->switch_work);
+	struct mmc_omap_slot *slot = (struct mmc_omap_slot *) arg;
+	tasklet_schedule(&slot->cover_tasklet);
 }
 
-static void mmc_omap_switch_handler(struct work_struct *work)
+static void mmc_omap_cover_handler(unsigned long param)
 {
-	struct mmc_omap_host *host = container_of(work, struct mmc_omap_host, switch_work);
-	struct mmc_card *card;
-	static int complained = 0;
-	int cards = 0, cover_open;
+	struct mmc_omap_slot *slot = (struct mmc_omap_slot *)param;
+	int cover_open = mmc_omap_cover_is_open(slot);
 
-	if (host->switch_pin == -1)
+	mmc_detect_change(slot->mmc, 0);
+	if (!cover_open)
 		return;
-	cover_open = mmc_omap_cover_is_open(host);
-	if (cover_open != host->switch_last_state) {
-		kobject_uevent(&host->dev->kobj, KOBJ_CHANGE);
-		host->switch_last_state = cover_open;
-	}
-	mmc_detect_change(host->mmc, 0);
-	list_for_each_entry(card, &host->mmc->cards, node) {
-		if (mmc_card_present(card))
-			cards++;
-	}
-	if (mmc_omap_cover_is_open(host)) {
-		if (!complained) {
-			dev_info(mmc_dev(host->mmc), "cover is open\n");
-			complained = 1;
-		}
-		if (mmc_omap_enable_poll)
-			mod_timer(&host->switch_timer, jiffies +
-				msecs_to_jiffies(OMAP_MMC_SWITCH_POLL_DELAY));
-	} else {
-		complained = 0;
-	}
+
+	/*
+	 * If no card is inserted, we postpone polling until
+	 * the cover has been closed.
+	 */
+	if (slot->mmc->card == NULL || !mmc_card_present(slot->mmc->card))
+		return;
+
+	mod_timer(&slot->cover_timer,
+		  jiffies + msecs_to_jiffies(OMAP_MMC_COVER_POLL_DELAY));
 }
 
 /* Prepare to transfer the next segment of a scatterlist */
@@ -765,13 +1057,12 @@ static inline void set_cmd_timeout(struct mmc_omap_host *host, struct mmc_reques
 
 static inline void set_data_timeout(struct mmc_omap_host *host, struct mmc_request *req)
 {
-	int timeout;
+	unsigned int timeout, cycle_ns;
 	u16 reg;
 
-	/* Convert ns to clock cycles by assuming 20MHz frequency
-	 * 1 cycle at 20MHz = 500 ns
-	 */
-	timeout = req->data->timeout_clks + req->data->timeout_ns / 500;
+	cycle_ns = 1000000000 / host->current_slot->fclk_freq;
+	timeout = req->data->timeout_ns / cycle_ns;
+	timeout += req->data->timeout_clks;
 
 	/* Check if we need to use timeout multiplier register */
 	reg = OMAP_MMC_READ(host, SDIO);
@@ -854,11 +1145,10 @@ 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;
 
@@ -867,60 +1157,56 @@ 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 innovator_fpga_socket_power(int on)
+static void mmc_omap_request(struct mmc_host *mmc, struct mmc_request *req)
 {
-#if defined(CONFIG_MACH_OMAP_INNOVATOR) && defined(CONFIG_ARCH_OMAP15XX)
-	if (on) {
-		fpga_write(fpga_read(OMAP1510_FPGA_POWER) | (1 << 3),
-		     OMAP1510_FPGA_POWER);
-	} else {
-		fpga_write(fpga_read(OMAP1510_FPGA_POWER) & ~(1 << 3),
-		     OMAP1510_FPGA_POWER);
-	}
-#endif
+	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);
 }
 
-/*
- * Turn the socket power on/off. Innovator uses FPGA, most boards
- * probably use GPIO.
- */
-static void mmc_omap_power(struct mmc_omap_host *host, int on)
+static void mmc_omap_set_power(struct mmc_omap_slot *slot, int power_on,
+				int vdd)
 {
-	if (on) {
-		if (machine_is_omap_innovator())
-			innovator_fpga_socket_power(1);
-		else if (machine_is_omap_h2())
-			tps65010_set_gpio_out_value(GPIO3, HIGH);
-		else if (machine_is_omap_h3())
-			/* GPIO 4 of TPS65010 sends SD_EN signal */
-			tps65010_set_gpio_out_value(GPIO4, HIGH);
-		else if (cpu_is_omap24xx()) {
-			u16 reg = OMAP_MMC_READ(host, CON);
-			OMAP_MMC_WRITE(host, CON, reg | (1 << 11));
-		} else
-			if (host->power_pin >= 0)
-				omap_set_gpio_dataout(host->power_pin, 1);
-	} else {
-		if (machine_is_omap_innovator())
-			innovator_fpga_socket_power(0);
-		else if (machine_is_omap_h2())
-			tps65010_set_gpio_out_value(GPIO3, LOW);
-		else if (machine_is_omap_h3())
-			tps65010_set_gpio_out_value(GPIO4, LOW);
-		else if (cpu_is_omap24xx()) {
-			u16 reg = OMAP_MMC_READ(host, CON);
-			OMAP_MMC_WRITE(host, CON, reg & ~(1 << 11));
-		} else
-			if (host->power_pin >= 0)
-				omap_set_gpio_dataout(host->power_pin, 0);
+	struct mmc_omap_host *host;
+
+	host = slot->host;
+
+	if (slot->pdata->set_power != NULL)
+		slot->pdata->set_power(mmc_dev(slot->mmc), slot->id, power_on,
+					vdd);
+
+	if (cpu_is_omap24xx()) {
+		u16 w;
+
+		if (power_on) {
+			w = OMAP_MMC_READ(host, CON);
+			OMAP_MMC_WRITE(host, CON, w | (1 << 11));
+		} else {
+			w = OMAP_MMC_READ(host, CON);
+			OMAP_MMC_WRITE(host, CON, w & ~(1 << 11));
+		}
 	}
 }
 
 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;
 
@@ -936,7 +1222,8 @@ static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 
 	if (dsor > 250)
 		dsor = 250;
-	dsor++;
+
+	slot->fclk_freq = func_clk_rate / dsor;
 
 	if (ios->bus_width == MMC_BUS_WIDTH_4)
 		dsor |= 1 << 15;
@@ -946,28 +1233,40 @@ static int mmc_omap_calc_divisor(struct mmc_h