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
  ...

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);

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

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);
 }
 

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)

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)
 {

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);
@@ -256,27 +399,47 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 	OMAP_MMC_WRITE(host, CMD, cmdreg);
 }
 
+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_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;
+	int clk_enabled;
+
+	mmc_omap_select_slot(slot, 0);
 
 	dsor = mmc_omap_calc_divisor(mmc, ios);
-	host->bus_mode = ios->bus_mode;
-	host->hw_bus_mode = host->bus_mode;
 
+	if (ios->vdd != slot->vdd)
+		slot->vdd = ios->vdd;
+
+	clk_enabled = 0;
 	switch (ios->power_mode) {
 	case MMC_POWER_OFF:
-		mmc_omap_power(host, 0);
+		mmc_omap_set_power(slot, 0, ios->vdd);
 		break;
 	case MMC_POWER_UP:
 		/* Cannot touch dsor yet, just power up MMC */
-		mmc_omap_power(host, 1);
-		return;
+		mmc_omap_set_power(slot, 1, ios->vdd);
+		goto exit;
 	case MMC_POWER_ON:
+		mmc_omap_fclk_enable(host, 1);
+		clk_enabled = 1;
 		dsor |= 1 << 11;
 		break;
 	}
 
-	clk_enable(host->fclk);
+	if (slot->bus_mode != ios->bus_mode) {
+		if (slot->pdata->set_bus_mode != NULL)
+			slot->pdata->set_bus_mode(mmc_dev(mmc), slot->id,
+						  ios->bus_mode);
+		slot->bus_mode = ios->bus_mode;
+	}
 
 	/* On insanely high arm_per frequencies something sometimes
 	 * goes somehow out of sync, and the POW bit is not being set,
@@ -975,43 +1274,143 @@ static void mmc_omap_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	 * Writing to the CON register twice seems to do the trick. */
 	for (i = 0; i < 2; i++)
 		OMAP_MMC_WRITE(host, CON, dsor);
+	slot->saved_con = dsor;
 	if (ios->power_mode == MMC_POWER_ON) {
+		/* worst case at 400kHz, 80 cycles makes 200 microsecs */
+		int usecs = 250;
+
 		/* Send clock cycles, poll completion */
 		OMAP_MMC_WRITE(host, IE, 0);
 		OMAP_MMC_WRITE(host, STAT, 0xffff);
 		OMAP_MMC_WRITE(host, CMD, 1 << 7);
-		while ((OMAP_MMC_READ(host, STAT) & 1) == 0);
+		while (usecs > 0 && (OMAP_MMC_READ(host, STAT) & 1) == 0) {
+			udelay(1);
+			usecs--;
+		}
 		OMAP_MMC_WRITE(host, STAT, 1);
 	}
-	clk_disable(host->fclk);
-}
-
-static int mmc_omap_get_ro(struct mmc_host *mmc)
-{
-	struct mmc_omap_host *host = mmc_priv(mmc);
 
-	return host->wp_pin && omap_get_gpio_datain(host->wp_pin);
+exit:
+	mmc_omap_release_slot(slot, clk_enabled);
 }
 
 static const struct mmc_host_ops mmc_omap_ops = {
 	.request	= mmc_omap_request,
 	.set_ios	= mmc_omap_set_ios,
-	.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_cover_state != NULL) {
+		r = device_create_file(&mmc->class_dev,
+					&dev_attr_cover_switch);
+		if (r < 0)
+			goto err_remove_slot_name;
+
+		setup_timer(&slot->cover_timer, mmc_omap_cover_timer,
+			    (unsigned long)slot);
+		tasklet_init(&slot->cover_tasklet, mmc_omap_cover_handler,
+			     (unsigned long)slot);
+		tasklet_schedule(&slot->cover_tasklet);
+	}
+
+	return 0;
+
+err_remove_slot_name:
+	if (slot->pdata->name != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_slot_name);
+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_cover_state != NULL)
+		device_remove_file(&mmc->class_dev, &dev_attr_cover_switch);
+
+	tasklet_kill(&slot->cover_tasklet);
+	del_timer_sync(&slot->cover_timer);
+	flush_scheduled_work();
+
+	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);
@@ -1019,28 +1418,46 @@ 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;
+	INIT_WORK(&host->slot_release_work, mmc_omap_slot_release_work);
+	INIT_WORK(&host->send_stop_work, mmc_omap_send_stop_work);
+
+	INIT_WORK(&host->cmd_abort_work, mmc_omap_abort_command);
+	setup_timer(&host->cmd_abort_timer, mmc_omap_cmd_timer,
+		    (unsigned long) host);
+
+	spin_lock_init(&host->clk_lock);
+	setup_timer(&host->clk_timer, mmc_omap_clk_timer, (unsigned long) host);
 
 	spin_lock_init(&host->dma_lock);
-	init_timer(&host->dma_timer);
-	host->dma_timer.function = mmc_omap_dma_timer;
-	host->dma_timer.data = (unsigned long) host;
+	setup_timer(&host->dma_timer, mmc_omap_dma_timer, (unsigned long) host);
+	spin_lock_init(&host->slot_lock);
+	init_waitqueue_head(&host->slot_wq);
+
+	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))
@@ -1058,109 +1475,34 @@ 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->switch_pin = minfo->switch_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 | MMC_CAP_BYTEBLOCK;
-
-	if (minfo->wire4)
-		 mmc->caps |= MMC_CAP_4_BIT_DATA;
-
-	/* 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;
-		}
-		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;
+		goto err_free_fclk;
 
-	host->dev = &pdev->dev;
-	platform_set_drvdata(pdev, host);
+	if (pdata->init != NULL) {
+		ret = pdata->init(&pdev->dev);
+		if (ret < 0)
+			goto err_free_irq;
+	}
 
-	if (host->switch_pin >= 0) {
-		INIT_WORK(&host->switch_work, mmc_omap_switch_handler);
-		init_timer(&host->switch_timer);
-		host->switch_timer.function = mmc_omap_switch_timer;
-		host->switch_timer.data = (unsigned long) host;
-		if (omap_request_gpio(host->switch_pin) != 0) {
-			dev_warn(mmc_dev(host->mmc), "Unable to get GPIO pin for MMC cover switch\n");
-			host->switch_pin = -1;
-			goto no_switch;
-		}
+	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]);
 
-		omap_set_gpio_direction(host->switch_pin, 1);
-		ret = request_irq(OMAP_GPIO_IRQ(host->switch_pin),
-				  mmc_omap_switch_irq, IRQF_TRIGGER_RISING, DRIVER_NAME, host);
-		if (ret) {
-			dev_warn(mmc_dev(host->mmc), "Unable to get IRQ for MMC cover switch\n");
-			omap_free_gpio(host->switch_pin);
-			host->switch_pin = -1;
-			goto no_switch;
-		}
-		ret = device_create_file(&pdev->dev, &dev_attr_cover_switch);
-		if (ret == 0) {
-			ret = device_create_file(&pdev->dev, &dev_attr_enable_poll);
-			if (ret != 0)
-				device_remove_file(&pdev->dev, &dev_attr_cover_switch);
+			goto err_plat_cleanup;
 		}
-		if (ret) {
-			dev_warn(mmc_dev(host->mmc), "Unable to create sysfs attributes\n");
-			free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
-			omap_free_gpio(host->switch_pin);
-			host->switch_pin = -1;
-			goto no_switch;
-		}
-		if (mmc_omap_enable_poll && mmc_omap_cover_is_open(host))
-			schedule_work(&host->switch_work);
 	}
 
-	mmc_add_host(mmc);
-
 	return 0;
 
-no_switch:
-	/* 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:
@@ -1169,7 +1511,7 @@ 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;
@@ -1178,25 +1520,18 @@ 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->switch_pin >= 0) {
-		device_remove_file(&pdev->dev, &dev_attr_enable_poll);
-		device_remove_file(&pdev->dev, &dev_attr_cover_switch);
-		free_irq(OMAP_GPIO_IRQ(host->switch_pin), host);
-		omap_free_gpio(host->switch_pin);
-		host->switch_pin = -1;
-		del_timer_sync(&host->switch_timer);
-		flush_scheduled_work();
-	}
 	if (host->iclk && !IS_ERR(host->iclk))
 		clk_put(host->iclk);
 	if (host->fclk && !IS_ERR(host->fclk))
@@ -1205,7 +1540,7 @@ 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;
 }
@@ -1213,35 +1548,47 @@ 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

drivers/mmc/host/sdhci.c

 /*
  *  linux/drivers/mmc/host/sdhci.c - Secure Digital Host Controller Interface driver
  *
- *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
+ *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,6 +19,8 @@
 #include <linux/dma-mapping.h>
 #include <linux/scatterlist.h>
 
+#include <linux/leds.h>
+
 #include <linux/mmc/host.h>
 
 #include "sdhci.h"
@@ -30,10 +32,6 @@
 
 static unsigned int debug_quirks = 0;
 
-/* For multi controllers in one platform case */
-static u16 chip_index = 0;
-static spinlock_t index_lock;
-
 /*
  * Different quirks to handle when the hardware deviates from a strict
  * interpretation of the SDHCI specification.
@@ -43,7 +41,7 @@ static spinlock_t index_lock;
 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET			(1<<0)
 /* Controller has bad caps bits, but really supports DMA */
 #define SDHCI_QUIRK_FORCE_DMA				(1<<1)
-/* Controller doesn't like some resets when there is no card inserted. */
+/* Controller doesn't like to be reset when there is no card inserted. */
 #define SDHCI_QUIRK_NO_CARD_NO_RESET			(1<<2)
 /* Controller doesn't like clearing the power reg before a change */
 #define SDHCI_QUIRK_SINGLE_POWER_WRITE			(1<<3)
@@ -71,12 +69,20 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
 	{
 		.vendor		= PCI_VENDOR_ID_RICOH,
 		.device		= PCI_DEVICE_ID_RICOH_R5C822,
-		.subvendor	= PCI_ANY_ID,
+		.subvendor	= PCI_VENDOR_ID_SAMSUNG,
 		.subdevice	= PCI_ANY_ID,
 		.driver_data	= SDHCI_QUIRK_FORCE_DMA |
 				  SDHCI_QUIRK_NO_CARD_NO_RESET,
 	},
 
+	{
+		.vendor		= PCI_VENDOR_ID_RICOH,
+		.device		= PCI_DEVICE_ID_RICOH_R5C822,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.driver_data	= SDHCI_QUIRK_FORCE_DMA,
+	},
+
 	{
 		.vendor		= PCI_VENDOR_ID_TI,
 		.device		= PCI_DEVICE_ID_TI_XX21_XX11_SD,
@@ -256,6 +262,24 @@ static void sdhci_deactivate_led(struct sdhci_host *host)
 	writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 }
 
+#ifdef CONFIG_LEDS_CLASS
+static void sdhci_led_control(struct led_classdev *led,
+	enum led_brightness brightness)
+{
+	struct sdhci_host *host = container_of(led, struct sdhci_host, led);
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	if (brightness == LED_OFF)
+		sdhci_deactivate_led(host);
+	else
+		sdhci_activate_led(host);
+
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+#endif
+
 /*****************************************************************************\
  *                                                                           *
  * Core functions                                                            *
@@ -773,7 +797,9 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	WARN_ON(host->mrq != NULL);
 
+#ifndef CONFIG_LEDS_CLASS
 	sdhci_activate_led(host);
+#endif
 
 	host->mrq = mrq;
 
@@ -965,7 +991,9 @@ static void sdhci_tasklet_finish(unsigned long param)
 	host->cmd = NULL;
 	host->data = NULL;
 
+#ifndef CONFIG_LEDS_CLASS
 	sdhci_deactivate_led(host);
+#endif
 
 	mmiowb();
 	spin_unlock_irqrestore(&host->lock, flags);
@@ -1105,7 +1133,8 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 		goto out;
 	}
 
-	DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
+	DBG("*** %s got interrupt: 0x%08x\n",
+		mmc_hostname(host->mmc), intmask);
 
 	if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
 		writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
@@ -1235,7 +1264,7 @@ static int sdhci_resume (struct pci_dev *pdev)
 		if (chip->hosts[i]->flags & SDHCI_USE_DMA)
 			pci_set_master(pdev);
 		ret = request_irq(chip->hosts[i]->irq, sdhci_irq,
-			IRQF_SHARED, chip->hosts[i]->slot_descr,
+			IRQF_SHARED, mmc_hostname(chip->hosts[i]->mmc),
 			chip->hosts[i]);
 		if (ret)
 			return ret;
@@ -1324,9 +1353,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 
 	DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
 
-	snprintf(host->slot_descr, 20, "sdhc%d:slot%d", chip->index, slot);
-
-	ret = pci_request_region(pdev, host->bar, host->slot_descr);
+	ret = pci_request_region(pdev, host->bar, mmc_hostname(mmc));
 	if (ret)
 		goto free;
 
@@ -1343,7 +1370,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
 	if (version > 1) {
 		printk(KERN_ERR "%s: Unknown controller version (%d). "
-			"You may experience problems.\n", host->slot_descr,
+			"You may experience problems.\n", mmc_hostname(mmc),
 			version);
 	}
 
@@ -1366,13 +1393,13 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 		(host->flags & SDHCI_USE_DMA)) {
 		printk(KERN_WARNING "%s: Will use DMA "
 			"mode even though HW doesn't fully "
-			"claim to support it.\n", host->slot_descr);
+			"claim to support it.\n", mmc_hostname(mmc));
 	}
 
 	if (host->flags & SDHCI_USE_DMA) {
 		if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 			printk(KERN_WARNING "%s: No suitable DMA available. "
-				"Falling back to PIO.\n", host->slot_descr);
+				"Falling back to PIO.\n", mmc_hostname(mmc));
 			host->flags &= ~SDHCI_USE_DMA;
 		}
 	}
@@ -1386,7 +1413,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 		(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
 	if (host->max_clk == 0) {
 		printk(KERN_ERR "%s: Hardware doesn't specify base clock "
-			"frequency.\n", host->slot_descr);
+			"frequency.\n", mmc_hostname(mmc));
 		ret = -ENODEV;
 		goto unmap;
 	}
@@ -1396,7 +1423,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 		(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
 	if (host->timeout_clk == 0) {
 		printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
-			"frequency.\n", host->slot_descr);
+			"frequency.\n", mmc_hostname(mmc));
 		ret = -ENODEV;
 		goto unmap;
 	}
@@ -1424,7 +1451,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 
 	if (mmc->ocr_avail == 0) {
 		printk(KERN_ERR "%s: Hardware doesn't report any "
-			"support voltages.\n", host->slot_descr);
+			"support voltages.\n", mmc_hostname(mmc));
 		ret = -ENODEV;
 		goto unmap;
 	}
@@ -1458,8 +1485,8 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	 */
 	mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
 	if (mmc->max_blk_size >= 3) {
-		printk(KERN_WARNING "%s: Invalid maximum block size, assuming 512\n",
-			host->slot_descr);
+		printk(KERN_WARNING "%s: Invalid maximum block size, "
+			"assuming 512 bytes\n", mmc_hostname(mmc));
 		mmc->max_blk_size = 512;
 	} else
 		mmc->max_blk_size = 512 << mmc->max_blk_size;
@@ -1480,7 +1507,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
 
 	ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
-		host->slot_descr, host);
+		mmc_hostname(mmc), host);
 	if (ret)
 		goto untasklet;
 
@@ -1490,16 +1517,32 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
 	sdhci_dumpregs(host);
 #endif
 
+#ifdef CONFIG_LEDS_CLASS
+	host->led.name = mmc_hostname(mmc);
+	host->led.brightness = LED_OFF;
+	host->led.default_trigger = mmc_hostname(mmc);
+	host->led.brightness_set = sdhci_led_control;
+
+	ret = led_classdev_register(&pdev->dev, &host->led);
+	if (ret)
+		goto reset;
+#endif
+
 	mmiowb();
 
 	mmc_add_host(mmc);
 
-	printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
-		host->addr, host->irq,
+	printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n",
+		mmc_hostname(mmc), host->addr, host->irq,
 		(host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
 
 	return 0;
 
+#ifdef CONFIG_LEDS_CLASS
+reset:
+	sdhci_reset(host, SDHCI_RESET_ALL);
+	free_irq(host->irq, host);
+#endif
 untasklet:
 	tasklet_kill(&host->card_tasklet);
 	tasklet_kill(&host->finish_tasklet);
@@ -1527,6 +1570,10 @@ static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
 
 	mmc_remove_host(mmc);
 
+#ifdef CONFIG_LEDS_CLASS
+	led_classdev_unregister(&host->led);
+#endif
+
 	sdhci_reset(host, SDHCI_RESET_ALL);
 
 	free_irq(host->irq, host);
@@ -1589,11 +1636,6 @@ static int __devinit sdhci_probe(struct pci_dev *pdev,
 	chip->num_slots = slots;
 	pci_set_drvdata(pdev, chip);
 
-	/* Add for multi controller case */
-	spin_lock(&index_lock);
-	chip->index = chip_index++;
-	spin_unlock(&index_lock);
-
 	for (i = 0;i < slots;i++) {
 		ret = sdhci_probe_slot(pdev, i);
 		if (ret) {
@@ -1654,8 +1696,6 @@ static int __init sdhci_drv_init(void)
 		": Secure Digital Host Controller Interface driver\n");
 	printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
 
-	spin_lock_init(&index_lock);
-
 	return pci_register_driver(&sdhci_driver);
 }
 

drivers/mmc/host/sdhci.h

 /*
  *  linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver
  *
- *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
+ *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -168,6 +168,10 @@ struct sdhci_host {
 	struct sdhci_chip	*chip;
 	struct mmc_host		*mmc;		/* MMC structure */
 
+#ifdef CONFIG_LEDS_CLASS
+	struct led_classdev	led;		/* LED control */
+#endif
+
 	spinlock_t		lock;		/* Mutex */
 
 	int			flags;		/* Host attributes */
@@ -190,8 +194,6 @@ struct sdhci_host {
 	int			offset;		/* Offset into current sg */
 	int			remain;		/* Bytes left in current */
 
-	char			slot_descr[20];	/* Name for reservations */
-
 	int			irq;		/* Device IRQ */
 	int			bar;		/* PCI BAR index */
 	unsigned long		addr;		/* Bus address */
@@ -208,7 +210,6 @@ struct sdhci_chip {
 
 	unsigned long		quirks;
 
-	int			index;		/* Index for chip0, chip1 ...*/
 	int			num_slots;	/* Slots on controller */
 	struct sdhci_host	*hosts[0];	/* Pointers to hosts */
 };

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;