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

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (75 commits)
  mmc: core: eMMC bus width may not work on all platforms
  mmc: sdhci: Auto-CMD23 fixes.
  mmc: sdhci: Auto-CMD23 support.
  mmc: core: Block CMD23 support for UHS104/SDXC cards.
  mmc: sdhci: Implement MMC_CAP_CMD23 for SDHCI.
  mmc: core: Use CMD23 for multiblock transfers when we can.
  mmc: quirks: Add/remove quirks conditional support.
  mmc: Add new VUB300 USB-to-SD/SDIO/MMC driver
  mmc: sdhci-pxa: Add quirks for DMA/ADMA to match h/w
  mmc: core: duplicated trial with same freq in mmc_rescan_try_freq()
  mmc: core: add support for eMMC Dual Data Rate
  mmc: core: eMMC signal voltage does not use CMD11
  mmc: sdhci-pxa: add platform code for UHS signaling
  mmc: sdhci: add hooks for setting UHS in platform specific code
  mmc: core: clear MMC_PM_KEEP_POWER flag on resume
  mmc: dw_mmc: fixed wrong regulator_enable in suspend/resume
  mmc: sdhi: allow powering down controller with no card inserted
  mmc: tmio: runtime suspend the controller, where possible
  mmc: sdhi: support up to 3 interrupt sources
  mmc: sdhi: print physical base address and clock rate
  ...

32 files changed, 5293 insertions, 552 deletions

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 61d233a7c11..71da5641e25 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -31,7 +31,11 @@
 #include <linux/mutex.h>
 #include <linux/scatterlist.h>
 #include <linux/string_helpers.h>
+#include <linux/delay.h>
+#include <linux/capability.h>
+#include <linux/compat.h>
 
+#include <linux/mmc/ioctl.h>
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
@@ -48,6 +52,13 @@ MODULE_ALIAS("mmc:block");
 #endif
 #define MODULE_PARAM_PREFIX "mmcblk."
 
+#define INAND_CMD38_ARG_EXT_CSD  113
+#define INAND_CMD38_ARG_ERASE    0x00
+#define INAND_CMD38_ARG_TRIM     0x01
+#define INAND_CMD38_ARG_SECERASE 0x80
+#define INAND_CMD38_ARG_SECTRIM1 0x81
+#define INAND_CMD38_ARG_SECTRIM2 0x88
+
 static DEFINE_MUTEX(block_mutex);
 
 /*
@@ -64,6 +75,7 @@ static int max_devices;
 
 /* 256 minors, so at most 256 separate devices */
 static DECLARE_BITMAP(dev_use, 256);
+static DECLARE_BITMAP(name_use, 256);
 
 /*
  * There is one mmc_blk_data per slot.
@@ -72,9 +84,24 @@ struct mmc_blk_data {
 	spinlock_t	lock;
 	struct gendisk	*disk;
 	struct mmc_queue queue;
+	struct list_head part;
+
+	unsigned int	flags;
+#define MMC_BLK_CMD23	(1 << 0)	/* Can do SET_BLOCK_COUNT for multiblock */
+#define MMC_BLK_REL_WR	(1 << 1)	/* MMC Reliable write support */
 
 	unsigned int	usage;
 	unsigned int	read_only;
+	unsigned int	part_type;
+	unsigned int	name_idx;
+
+	/*
+	 * Only set in main mmc_blk_data associated
+	 * with mmc_card with mmc_set_drvdata, and keeps
+	 * track of the current selected device partition.
+	 */
+	unsigned int	part_curr;
+	struct device_attribute force_ro;
 };
 
 static DEFINE_MUTEX(open_lock);
@@ -97,17 +124,22 @@ static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
 	return md;
 }
 
+static inline int mmc_get_devidx(struct gendisk *disk)
+{
+	int devmaj = MAJOR(disk_devt(disk));
+	int devidx = MINOR(disk_devt(disk)) / perdev_minors;
+
+	if (!devmaj)
+		devidx = disk->first_minor / perdev_minors;
+	return devidx;
+}
+
 static void mmc_blk_put(struct mmc_blk_data *md)
 {
 	mutex_lock(&open_lock);
 	md->usage--;
 	if (md->usage == 0) {
-		int devmaj = MAJOR(disk_devt(md->disk));
-		int devidx = MINOR(disk_devt(md->disk)) / perdev_minors;
-
-		if (!devmaj)
-			devidx = md->disk->first_minor / perdev_minors;
-
+		int devidx = mmc_get_devidx(md->disk);
 		blk_cleanup_queue(md->queue.queue);
 
 		__clear_bit(devidx, dev_use);
@@ -118,6 +150,38 @@ static void mmc_blk_put(struct mmc_blk_data *md)
 	mutex_unlock(&open_lock);
 }
 
+static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	int ret;
+	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+
+	ret = snprintf(buf, PAGE_SIZE, "%d",
+		       get_disk_ro(dev_to_disk(dev)) ^
+		       md->read_only);
+	mmc_blk_put(md);
+	return ret;
+}
+
+static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	int ret;
+	char *end;
+	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
+	unsigned long set = simple_strtoul(buf, &end, 0);
+	if (end == buf) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	set_disk_ro(dev_to_disk(dev), set || md->read_only);
+	ret = count;
+out:
+	mmc_blk_put(md);
+	return ret;
+}
+
 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
 {
 	struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
@@ -158,35 +222,255 @@ mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
+struct mmc_blk_ioc_data {
+	struct mmc_ioc_cmd ic;
+	unsigned char *buf;
+	u64 buf_bytes;
+};
+
+static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
+	struct mmc_ioc_cmd __user *user)
+{
+	struct mmc_blk_ioc_data *idata;
+	int err;
+
+	idata = kzalloc(sizeof(*idata), GFP_KERNEL);
+	if (!idata) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
+		err = -EFAULT;
+		goto idata_err;
+	}
+
+	idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
+	if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
+		err = -EOVERFLOW;
+		goto idata_err;
+	}
+
+	idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
+	if (!idata->buf) {
+		err = -ENOMEM;
+		goto idata_err;
+	}
+
+	if (copy_from_user(idata->buf, (void __user *)(unsigned long)
+					idata->ic.data_ptr, idata->buf_bytes)) {
+		err = -EFAULT;
+		goto copy_err;
+	}
+
+	return idata;
+
+copy_err:
+	kfree(idata->buf);
+idata_err:
+	kfree(idata);
+out:
+	return ERR_PTR(err);
+}
+
+static int mmc_blk_ioctl_cmd(struct block_device *bdev,
+	struct mmc_ioc_cmd __user *ic_ptr)
+{
+	struct mmc_blk_ioc_data *idata;
+	struct mmc_blk_data *md;
+	struct mmc_card *card;
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
+	struct mmc_request mrq = {0};
+	struct scatterlist sg;
+	int err;
+
+	/*
+	 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
+	 * whole block device, not on a partition.  This prevents overspray
+	 * between sibling partitions.
+	 */
+	if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
+		return -EPERM;
+
+	idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
+	if (IS_ERR(idata))
+		return PTR_ERR(idata);
+
+	cmd.opcode = idata->ic.opcode;
+	cmd.arg = idata->ic.arg;
+	cmd.flags = idata->ic.flags;
+
+	data.sg = &sg;
+	data.sg_len = 1;
+	data.blksz = idata->ic.blksz;
+	data.blocks = idata->ic.blocks;
+
+	sg_init_one(data.sg, idata->buf, idata->buf_bytes);
+
+	if (idata->ic.write_flag)
+		data.flags = MMC_DATA_WRITE;
+	else
+		data.flags = MMC_DATA_READ;
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	md = mmc_blk_get(bdev->bd_disk);
+	if (!md) {
+		err = -EINVAL;
+		goto cmd_done;
+	}
+
+	card = md->queue.card;
+	if (IS_ERR(card)) {
+		err = PTR_ERR(card);
+		goto cmd_done;
+	}
+
+	mmc_claim_host(card->host);
+
+	if (idata->ic.is_acmd) {
+		err = mmc_app_cmd(card->host, card);
+		if (err)
+			goto cmd_rel_host;
+	}
+
+	/* data.flags must already be set before doing this. */
+	mmc_set_data_timeout(&data, card);
+	/* Allow overriding the timeout_ns for empirical tuning. */
+	if (idata->ic.data_timeout_ns)
+		data.timeout_ns = idata->ic.data_timeout_ns;
+
+	if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
+		/*
+		 * Pretend this is a data transfer and rely on the host driver
+		 * to compute timeout.  When all host drivers support
+		 * cmd.cmd_timeout for R1B, this can be changed to:
+		 *
+		 *     mrq.data = NULL;
+		 *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
+		 */
+		data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
+	}
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	if (cmd.error) {
+		dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
+						__func__, cmd.error);
+		err = cmd.error;
+		goto cmd_rel_host;
+	}
+	if (data.error) {
+		dev_err(mmc_dev(card->host), "%s: data error %d\n",
+						__func__, data.error);
+		err = data.error;
+		goto cmd_rel_host;
+	}
+
+	/*
+	 * According to the SD specs, some commands require a delay after
+	 * issuing the command.
+	 */
+	if (idata->ic.postsleep_min_us)
+		usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
+
+	if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
+		err = -EFAULT;
+		goto cmd_rel_host;
+	}
+
+	if (!idata->ic.write_flag) {
+		if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
+						idata->buf, idata->buf_bytes)) {
+			err = -EFAULT;
+			goto cmd_rel_host;
+		}
+	}
+
+cmd_rel_host:
+	mmc_release_host(card->host);
+
+cmd_done:
+	mmc_blk_put(md);
+	kfree(idata->buf);
+	kfree(idata);
+	return err;
+}
+
+static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
+	unsigned int cmd, unsigned long arg)
+{
+	int ret = -EINVAL;
+	if (cmd == MMC_IOC_CMD)
+		ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
+	unsigned int cmd, unsigned long arg)
+{
+	return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
+}
+#endif
+
 static const struct block_device_operations mmc_bdops = {
 	.open			= mmc_blk_open,
 	.release		= mmc_blk_release,
 	.getgeo			= mmc_blk_getgeo,
 	.owner			= THIS_MODULE,
+	.ioctl			= mmc_blk_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl		= mmc_blk_compat_ioctl,
+#endif
 };
 
 struct mmc_blk_request {
 	struct mmc_request	mrq;
+	struct mmc_command	sbc;
 	struct mmc_command	cmd;
 	struct mmc_command	stop;
 	struct mmc_data		data;
 };
 
+static inline int mmc_blk_part_switch(struct mmc_card *card,
+				      struct mmc_blk_data *md)
+{
+	int ret;
+	struct mmc_blk_data *main_md = mmc_get_drvdata(card);
+	if (main_md->part_curr == md->part_type)
+		return 0;
+
+	if (mmc_card_mmc(card)) {
+		card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
+		card->ext_csd.part_config |= md->part_type;
+
+		ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_PART_CONFIG, card->ext_csd.part_config,
+				 card->ext_csd.part_time);
+		if (ret)
+			return ret;
+}
+
+	main_md->part_curr = md->part_type;
+	return 0;
+}
+
 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 {
 	int err;
 	u32 result;
 	__be32 *blocks;
 
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	unsigned int timeout_us;
 
 	struct scatterlist sg;
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_APP_CMD;
 	cmd.arg = card->rca << 16;
 	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
@@ -203,8 +487,6 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 	cmd.arg = 0;
 	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
 
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	data.timeout_ns = card->csd.tacc_ns * 100;
 	data.timeout_clks = card->csd.tacc_clks * 100;
 
@@ -223,8 +505,6 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 	data.sg = &sg;
 	data.sg_len = 1;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 
@@ -247,10 +527,9 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 
 static u32 get_card_status(struct mmc_card *card, struct request *req)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int err;
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
 	cmd.opcode = MMC_SEND_STATUS;
 	if (!mmc_host_is_spi(card->host))
 		cmd.arg = card->rca << 16;
@@ -269,8 +548,6 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
 	unsigned int from, nr, arg;
 	int err = 0;
 
-	mmc_claim_host(card->host);
-
 	if (!mmc_can_erase(card)) {
 		err = -EOPNOTSUPP;
 		goto out;
@@ -284,14 +561,22 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
 	else
 		arg = MMC_ERASE_ARG;
 
+	if (card->quirks & MMC_QUIRK_INAND_CMD38) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 INAND_CMD38_ARG_EXT_CSD,
+				 arg == MMC_TRIM_ARG ?
+				 INAND_CMD38_ARG_TRIM :
+				 INAND_CMD38_ARG_ERASE,
+				 0);
+		if (err)
+			goto out;
+	}
 	err = mmc_erase(card, from, nr, arg);
 out:
 	spin_lock_irq(&md->lock);
 	__blk_end_request(req, err, blk_rq_bytes(req));
 	spin_unlock_irq(&md->lock);
 
-	mmc_release_host(card->host);
-
 	return err ? 0 : 1;
 }
 
@@ -303,8 +588,6 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
 	unsigned int from, nr, arg;
 	int err = 0;
 
-	mmc_claim_host(card->host);
-
 	if (!mmc_can_secure_erase_trim(card)) {
 		err = -EOPNOTSUPP;
 		goto out;
@@ -318,19 +601,74 @@ static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
 	else
 		arg = MMC_SECURE_ERASE_ARG;
 
+	if (card->quirks & MMC_QUIRK_INAND_CMD38) {
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 INAND_CMD38_ARG_EXT_CSD,
+				 arg == MMC_SECURE_TRIM1_ARG ?
+				 INAND_CMD38_ARG_SECTRIM1 :
+				 INAND_CMD38_ARG_SECERASE,
+				 0);
+		if (err)
+			goto out;
+	}
 	err = mmc_erase(card, from, nr, arg);
-	if (!err && arg == MMC_SECURE_TRIM1_ARG)
+	if (!err && arg == MMC_SECURE_TRIM1_ARG) {
+		if (card->quirks & MMC_QUIRK_INAND_CMD38) {
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 INAND_CMD38_ARG_EXT_CSD,
+					 INAND_CMD38_ARG_SECTRIM2,
+					 0);
+			if (err)
+				goto out;
+		}
 		err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
+	}
 out:
 	spin_lock_irq(&md->lock);
 	__blk_end_request(req, err, blk_rq_bytes(req));
 	spin_unlock_irq(&md->lock);
 
-	mmc_release_host(card->host);
-
 	return err ? 0 : 1;
 }
 
+static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
+{
+	struct mmc_blk_data *md = mq->data;
+
+	/*
+	 * No-op, only service this because we need REQ_FUA for reliable
+	 * writes.
+	 */
+	spin_lock_irq(&md->lock);
+	__blk_end_request_all(req, 0);
+	spin_unlock_irq(&md->lock);
+
+	return 1;
+}
+
+/*
+ * Reformat current write as a reliable write, supporting
+ * both legacy and the enhanced reliable write MMC cards.
+ * In each transfer we'll handle only as much as a single
+ * reliable write can handle, thus finish the request in
+ * partial completions.
+ */
+static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
+				    struct mmc_card *card,
+				    struct request *req)
+{
+	if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
+		/* Legacy mode imposes restrictions on transfers. */
+		if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
+			brq->data.blocks = 1;
+
+		if (brq->data.blocks > card->ext_csd.rel_sectors)
+			brq->data.blocks = card->ext_csd.rel_sectors;
+		else if (brq->data.blocks < card->ext_csd.rel_sectors)
+			brq->data.blocks = 1;
+	}
+}
+
 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 {
 	struct mmc_blk_data *md = mq->data;
@@ -338,10 +676,17 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 	struct mmc_blk_request brq;
 	int ret = 1, disable_multi = 0;
 
-	mmc_claim_host(card->host);
+	/*
+	 * Reliable writes are used to implement Forced Unit Access and
+	 * REQ_META accesses, and are supported only on MMCs.
+	 */
+	bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
+			  (req->cmd_flags & REQ_META)) &&
+		(rq_data_dir(req) == WRITE) &&
+		(md->flags & MMC_BLK_REL_WR);
 
 	do {
-		struct mmc_command cmd;
+		struct mmc_command cmd = {0};
 		u32 readcmd, writecmd, status = 0;
 
 		memset(&brq, 0, sizeof(struct mmc_blk_request));
@@ -374,12 +719,12 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		if (disable_multi && brq.data.blocks > 1)
 			brq.data.blocks = 1;
 
-		if (brq.data.blocks > 1) {
+		if (brq.data.blocks > 1 || do_rel_wr) {
 			/* SPI multiblock writes terminate using a special
 			 * token, not a STOP_TRANSMISSION request.
 			 */
-			if (!mmc_host_is_spi(card->host)
-					|| rq_data_dir(req) == READ)
+			if (!mmc_host_is_spi(card->host) ||
+			    rq_data_dir(req) == READ)
 				brq.mrq.stop = &brq.stop;
 			readcmd = MMC_READ_MULTIPLE_BLOCK;
 			writecmd = MMC_WRITE_MULTIPLE_BLOCK;
@@ -396,6 +741,38 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 			brq.data.flags |= MMC_DATA_WRITE;
 		}
 
+		if (do_rel_wr)
+			mmc_apply_rel_rw(&brq, card, req);
+
+		/*
+		 * Pre-defined multi-block transfers are preferable to
+		 * open ended-ones (and necessary for reliable writes).
+		 * However, it is not sufficient to just send CMD23,
+		 * and avoid the final CMD12, as on an error condition
+		 * CMD12 (stop) needs to be sent anyway. This, coupled
+		 * with Auto-CMD23 enhancements provided by some
+		 * hosts, means that the complexity of dealing
+		 * with this is best left to the host. If CMD23 is
+		 * supported by card and host, we'll fill sbc in and let
+		 * the host deal with handling it correctly. This means
+		 * that for hosts that don't expose MMC_CAP_CMD23, no
+		 * change of behavior will be observed.
+		 *
+		 * N.B: Some MMC cards experience perf degradation.
+		 * We'll avoid using CMD23-bounded multiblock writes for
+		 * these, while retaining features like reliable writes.
+		 */
+
+		if ((md->flags & MMC_BLK_CMD23) &&
+		    mmc_op_multi(brq.cmd.opcode) &&
+		    (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23))) {
+			brq.sbc.opcode = MMC_SET_BLOCK_COUNT;
+			brq.sbc.arg = brq.data.blocks |
+				(do_rel_wr ? (1 << 31) : 0);
+			brq.sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
+			brq.mrq.sbc = &brq.sbc;
+		}
+
 		mmc_set_data_timeout(&brq.data, card);
 
 		brq.data.sg = mq->sg;
@@ -431,7 +808,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		 * until later as we need to wait for the card to leave
 		 * programming mode even when things go wrong.
 		 */
-		if (brq.cmd.error || brq.data.error || brq.stop.error) {
+		if (brq.sbc.error || brq.cmd.error ||
+		    brq.data.error || brq.stop.error) {
 			if (brq.data.blocks > 1 && rq_data_dir(req) == READ) {
 				/* Redo read one sector at a time */
 				printk(KERN_WARNING "%s: retrying using single "
@@ -442,6 +820,13 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 			status = get_card_status(card, req);
 		}
 
+		if (brq.sbc.error) {
+			printk(KERN_ERR "%s: error %d sending SET_BLOCK_COUNT "
+			       "command, response %#x, card status %#x\n",
+			       req->rq_disk->disk_name, brq.sbc.error,
+			       brq.sbc.resp[0], status);
+		}
+
 		if (brq.cmd.error) {
 			printk(KERN_ERR "%s: error %d sending read/write "
 			       "command, response %#x, card status %#x\n",
@@ -520,8 +905,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		spin_unlock_irq(&md->lock);
 	} while (ret);
 
-	mmc_release_host(card->host);
-
 	return 1;
 
  cmd_err:
@@ -548,8 +931,6 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		spin_unlock_irq(&md->lock);
 	}
 
-	mmc_release_host(card->host);
-
 	spin_lock_irq(&md->lock);
 	while (ret)
 		ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req));
@@ -560,14 +941,31 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 
 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 {
+	int ret;
+	struct mmc_blk_data *md = mq->data;
+	struct mmc_card *card = md->queue.card;
+
+	mmc_claim_host(card->host);
+	ret = mmc_blk_part_switch(card, md);
+	if (ret) {
+		ret = 0;
+		goto out;
+	}
+
 	if (req->cmd_flags & REQ_DISCARD) {
 		if (req->cmd_flags & REQ_SECURE)
-			return mmc_blk_issue_secdiscard_rq(mq, req);
+			ret = mmc_blk_issue_secdiscard_rq(mq, req);
 		else
-			return mmc_blk_issue_discard_rq(mq, req);
+			ret = mmc_blk_issue_discard_rq(mq, req);
+	} else if (req->cmd_flags & REQ_FLUSH) {
+		ret = mmc_blk_issue_flush(mq, req);
 	} else {
-		return mmc_blk_issue_rw_rq(mq, req);
+		ret = mmc_blk_issue_rw_rq(mq, req);
 	}
+
+out:
+	mmc_release_host(card->host);
+	return ret;
 }
 
 static inline int mmc_blk_readonly(struct mmc_card *card)
@@ -576,7 +974,11 @@ static inline int mmc_blk_readonly(struct mmc_card *card)
 	       !(card->csd.cmdclass & CCC_BLOCK_WRITE);
 }
 
-static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
+static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
+					      struct device *parent,
+					      sector_t size,
+					      bool default_ro,
+					      const char *subname)
 {
 	struct mmc_blk_data *md;
 	int devidx, ret;
@@ -592,6 +994,19 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 		goto out;
 	}
 
+	/*
+	 * !subname implies we are creating main mmc_blk_data that will be
+	 * associated with mmc_card with mmc_set_drvdata. Due to device
+	 * partitions, devidx will not coincide with a per-physical card
+	 * index anymore so we keep track of a name index.
+	 */
+	if (!subname) {
+		md->name_idx = find_first_zero_bit(name_use, max_devices);
+		__set_bit(md->name_idx, name_use);
+	}
+	else
+		md->name_idx = ((struct mmc_blk_data *)
+				dev_to_disk(parent)->private_data)->name_idx;
 
 	/*
 	 * Set the read-only status based on the supported commands
@@ -606,6 +1021,7 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 	}
 
 	spin_lock_init(&md->lock);
+	INIT_LIST_HEAD(&md->part);
 	md->usage = 1;
 
 	ret = mmc_init_queue(&md->queue, card, &md->lock);
@@ -620,8 +1036,8 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 	md->disk->fops = &mmc_bdops;
 	md->disk->private_data = md;
 	md->disk->queue = md->queue.queue;
-	md->disk->driverfs_dev = &card->dev;
-	set_disk_ro(md->disk, md->read_only);
+	md->disk->driverfs_dev = parent;
+	set_disk_ro(md->disk, md->read_only || default_ro);
 
 	/*
 	 * As discussed on lkml, GENHD_FL_REMOVABLE should:
@@ -636,32 +1052,107 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 	 */
 
 	snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
-		"mmcblk%d", devidx);
+		 "mmcblk%d%s", md->name_idx, subname ? subname : "");
 
 	blk_queue_logical_block_size(md->queue.queue, 512);
+	set_capacity(md->disk, size);
+
+	if (mmc_host_cmd23(card->host)) {
+		if (mmc_card_mmc(card) ||
+		    (mmc_card_sd(card) &&
+		     card->scr.cmds & SD_SCR_CMD23_SUPPORT))
+			md->flags |= MMC_BLK_CMD23;
+	}
+
+	if (mmc_card_mmc(card) &&
+	    md->flags & MMC_BLK_CMD23 &&
+	    ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
+	     card->ext_csd.rel_sectors)) {
+		md->flags |= MMC_BLK_REL_WR;
+		blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
+	}
+
+	return md;
+
+ err_putdisk:
+	put_disk(md->disk);
+ err_kfree:
+	kfree(md);
+ out:
+	return ERR_PTR(ret);
+}
+
+static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
+{
+	sector_t size;
+	struct mmc_blk_data *md;
 
 	if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
 		/*
 		 * The EXT_CSD sector count is in number or 512 byte
 		 * sectors.
 		 */
-		set_capacity(md->disk, card->ext_csd.sectors);
+		size = card->ext_csd.sectors;
 	} else {
 		/*
 		 * The CSD capacity field is in units of read_blkbits.
 		 * set_capacity takes units of 512 bytes.
 		 */
-		set_capacity(md->disk,
-			card->csd.capacity << (card->csd.read_blkbits - 9));
+		size = card->csd.capacity << (card->csd.read_blkbits - 9);
 	}
+
+	md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL);
 	return md;
+}
 
- err_putdisk:
-	put_disk(md->disk);
- err_kfree:
-	kfree(md);
- out:
-	return ERR_PTR(ret);
+static int mmc_blk_alloc_part(struct mmc_card *card,
+			      struct mmc_blk_data *md,
+			      unsigned int part_type,
+			      sector_t size,
+			      bool default_ro,
+			      const char *subname)
+{
+	char cap_str[10];
+	struct mmc_blk_data *part_md;
+
+	part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
+				    subname);
+	if (IS_ERR(part_md))
+		return PTR_ERR(part_md);
+	part_md->part_type = part_type;
+	list_add(&part_md->part, &md->part);
+
+	string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2,
+			cap_str, sizeof(cap_str));
+	printk(KERN_INFO "%s: %s %s partition %u %s\n",
+	       part_md->disk->disk_name, mmc_card_id(card),
+	       mmc_card_name(card), part_md->part_type, cap_str);
+	return 0;
+}
+
+static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
+{
+	int ret = 0;
+
+	if (!mmc_card_mmc(card))
+		return 0;
+
+	if (card->ext_csd.boot_size) {
+		ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0,
+					 card->ext_csd.boot_size >> 9,
+					 true,
+					 "boot0");
+		if (ret)
+			return ret;
+		ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT1,
+					 card->ext_csd.boot_size >> 9,
+					 true,
+					 "boot1");
+		if (ret)
+			return ret;
+	}
+
+	return ret;
 }
 
 static int
@@ -682,9 +1173,81 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
 	return 0;
 }
 
+static void mmc_blk_remove_req(struct mmc_blk_data *md)
+{
+	if (md) {
+		if (md->disk->flags & GENHD_FL_UP) {
+			device_remove_file(disk_to_dev(md->disk), &md->force_ro);
+
+			/* Stop new requests from getting into the queue */
+			del_gendisk(md->disk);
+		}
+
+		/* Then flush out any already in there */
+		mmc_cleanup_queue(&md->queue);
+		mmc_blk_put(md);
+	}
+}
+
+static void mmc_blk_remove_parts(struct mmc_card *card,
+				 struct mmc_blk_data *md)
+{
+	struct list_head *pos, *q;
+	struct mmc_blk_data *part_md;
+
+	__clear_bit(md->name_idx, name_use);
+	list_for_each_safe(pos, q, &md->part) {
+		part_md = list_entry(pos, struct mmc_blk_data, part);
+		list_del(pos);
+		mmc_blk_remove_req(part_md);
+	}
+}
+
+static int mmc_add_disk(struct mmc_blk_data *md)
+{
+	int ret;
+
+	add_disk(md->disk);
+	md->force_ro.show = force_ro_show;
+	md->force_ro.store = force_ro_store;
+	sysfs_attr_init(&md->force_ro.attr);
+	md->force_ro.attr.name = "force_ro";
+	md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
+	ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
+	if (ret)
+		del_gendisk(md->disk);
+
+	return ret;
+}
+
+static const struct mmc_fixup blk_fixups[] =
+{
+	MMC_FIXUP("SEM02G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM04G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM08G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM16G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
+	MMC_FIXUP("SEM32G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38),
+
+	/*
+	 * Some MMC cards experience performance degradation with CMD23
+	 * instead of CMD12-bounded multiblock transfers. For now we'll
+	 * black list what's bad...
+	 * - Certain Toshiba cards.
+	 *
+	 * N.B. This doesn't affect SD cards.
+	 */
+	MMC_FIXUP("MMC08G", 0x11, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("MMC16G", 0x11, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	MMC_FIXUP("MMC32G", 0x11, CID_OEMID_ANY, add_quirk_mmc,
+		  MMC_QUIRK_BLK_NO_CMD23),
+	END_FIXUP
+};
+
 static int mmc_blk_probe(struct mmc_card *card)
 {
-	struct mmc_blk_data *md;
+	struct mmc_blk_data *md, *part_md;
 	int err;
 	char cap_str[10];
 
@@ -708,14 +1271,24 @@ static int mmc_blk_probe(struct mmc_card *card)
 		md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
 		cap_str, md->read_only ? "(ro)" : "");
 
+	if (mmc_blk_alloc_parts(card, md))
+		goto out;
+
 	mmc_set_drvdata(card, md);
-	add_disk(md->disk);
+	mmc_fixup_device(card, blk_fixups);
+
+	if (mmc_add_disk(md))
+		goto out;
+
+	list_for_each_entry(part_md, &md->part, part) {
+		if (mmc_add_disk(part_md))
+			goto out;
+	}
 	return 0;
 
  out:
-	mmc_cleanup_queue(&md->queue);
-	mmc_blk_put(md);
-
+	mmc_blk_remove_parts(card, md);
+	mmc_blk_remove_req(md);
 	return err;
 }
 
@@ -723,36 +1296,43 @@ static void mmc_blk_remove(struct mmc_card *card)
 {
 	struct mmc_blk_data *md = mmc_get_drvdata(card);
 
-	if (md) {
-		/* Stop new requests from getting into the queue */
-		del_gendisk(md->disk);
-
-		/* Then flush out any already in there */
-		mmc_cleanup_queue(&md->queue);
-
-		mmc_blk_put(md);
-	}
+	mmc_blk_remove_parts(card, md);
+	mmc_blk_remove_req(md);
 	mmc_set_drvdata(card, NULL);
 }
 
 #ifdef CONFIG_PM
 static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state)
 {
+	struct mmc_blk_data *part_md;
 	struct mmc_blk_data *md = mmc_get_drvdata(card);
 
 	if (md) {
 		mmc_queue_suspend(&md->queue);
+		list_for_each_entry(part_md, &md->part, part) {
+			mmc_queue_suspend(&part_md->queue);
+		}
 	}
 	return 0;
 }
 
 static int mmc_blk_resume(struct mmc_card *card)
 {
+	struct mmc_blk_data *part_md;
 	struct mmc_blk_data *md = mmc_get_drvdata(card);
 
 	if (md) {
 		mmc_blk_set_blksize(md, card);
+
+		/*
+		 * Resume involves the card going into idle state,
+		 * so current partition is always the main one.
+		 */
+		md->part_curr = md->part_type;
 		mmc_queue_resume(&md->queue);
+		list_for_each_entry(part_md, &md->part, part) {
+			mmc_queue_resume(&part_md->queue);
+		}
 	}
 	return 0;
 }
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index abc1a63bcc5..233cdfae92f 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -212,7 +212,7 @@ static int mmc_test_busy(struct mmc_command *cmd)
 static int mmc_test_wait_busy(struct mmc_test_card *test)
 {
 	int ret, busy;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	busy = 0;
 	do {
@@ -246,18 +246,13 @@ static int mmc_test_buffer_transfer(struct mmc_test_card *test,
 {
 	int ret;
 
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_command stop;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_command stop = {0};
+	struct mmc_data data = {0};
 
 	struct scatterlist sg;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-	memset(&stop, 0, sizeof(struct mmc_command));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 	mrq.stop = &stop;
@@ -731,15 +726,10 @@ static int mmc_test_simple_transfer(struct mmc_test_card *test,
 	struct scatterlist *sg, unsigned sg_len, unsigned dev_addr,
 	unsigned blocks, unsigned blksz, int write)
 {
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_command stop;
-	struct mmc_data data;
-
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-	memset(&stop, 0, sizeof(struct mmc_command));
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_command stop = {0};
+	struct mmc_data data = {0};
 
 	mrq.cmd = &cmd;
 	mrq.data = &data;
@@ -761,18 +751,13 @@ static int mmc_test_simple_transfer(struct mmc_test_card *test,
 static int mmc_test_broken_transfer(struct mmc_test_card *test,
 	unsigned blocks, unsigned blksz, int write)
 {
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_command stop;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_command stop = {0};
+	struct mmc_data data = {0};
 
 	struct scatterlist sg;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-	memset(&stop, 0, sizeof(struct mmc_command));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 	mrq.stop = &stop;
@@ -1401,8 +1386,9 @@ static int mmc_test_area_io(struct mmc_test_card *test, unsigned long sz,
  */
 static int mmc_test_area_fill(struct mmc_test_card *test)
 {
-	return mmc_test_area_io(test, test->area.max_tfr, test->area.dev_addr,
-				1, 0, 0);
+	struct mmc_test_area *t = &test->area;
+
+	return mmc_test_area_io(test, t->max_tfr, t->dev_addr, 1, 0, 0);
 }
 
 /*
@@ -1415,7 +1401,7 @@ static int mmc_test_area_erase(struct mmc_test_card *test)
 	if (!mmc_can_erase(test->card))
 		return 0;
 
-	return mmc_erase(test->card, t->dev_addr, test->area.max_sz >> 9,
+	return mmc_erase(test->card, t->dev_addr, t->max_sz >> 9,
 			 MMC_ERASE_ARG);
 }
 
@@ -1542,8 +1528,10 @@ static int mmc_test_area_prepare_fill(struct mmc_test_card *test)
 static int mmc_test_best_performance(struct mmc_test_card *test, int write,
 				     int max_scatter)
 {
-	return mmc_test_area_io(test, test->area.max_tfr, test->area.dev_addr,
-				write, max_scatter, 1);
+	struct mmc_test_area *t = &test->area;
+
+	return mmc_test_area_io(test, t->max_tfr, t->dev_addr, write,
+				max_scatter, 1);
 }
 
 /*
@@ -1583,18 +1571,19 @@ static int mmc_test_best_write_perf_max_scatter(struct mmc_test_card *test)
  */
 static int mmc_test_profile_read_perf(struct mmc_test_card *test)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned long sz;
 	unsigned int dev_addr;
 	int ret;
 
-	for (sz = 512; sz < test->area.max_tfr; sz <<= 1) {
-		dev_addr = test->area.dev_addr + (sz >> 9);
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		dev_addr = t->dev_addr + (sz >> 9);
 		ret = mmc_test_area_io(test, sz, dev_addr, 0, 0, 1);
 		if (ret)
 			return ret;
 	}
-	sz = test->area.max_tfr;
-	dev_addr = test->area.dev_addr;
+	sz = t->max_tfr;
+	dev_addr = t->dev_addr;
 	return mmc_test_area_io(test, sz, dev_addr, 0, 0, 1);
 }
 
@@ -1603,6 +1592,7 @@ static int mmc_test_profile_read_perf(struct mmc_test_card *test)
  */
 static int mmc_test_profile_write_perf(struct mmc_test_card *test)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned long sz;
 	unsigned int dev_addr;
 	int ret;
@@ -1610,8 +1600,8 @@ static int mmc_test_profile_write_perf(struct mmc_test_card *test)
 	ret = mmc_test_area_erase(test);
 	if (ret)
 		return ret;
-	for (sz = 512; sz < test->area.max_tfr; sz <<= 1) {
-		dev_addr = test->area.dev_addr + (sz >> 9);
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
+		dev_addr = t->dev_addr + (sz >> 9);
 		ret = mmc_test_area_io(test, sz, dev_addr, 1, 0, 1);
 		if (ret)
 			return ret;
@@ -1619,8 +1609,8 @@ static int mmc_test_profile_write_perf(struct mmc_test_card *test)
 	ret = mmc_test_area_erase(test);
 	if (ret)
 		return ret;
-	sz = test->area.max_tfr;
-	dev_addr = test->area.dev_addr;
+	sz = t->max_tfr;
+	dev_addr = t->dev_addr;
 	return mmc_test_area_io(test, sz, dev_addr, 1, 0, 1);
 }
 
@@ -1629,6 +1619,7 @@ static int mmc_test_profile_write_perf(struct mmc_test_card *test)
  */
 static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned long sz;
 	unsigned int dev_addr;
 	struct timespec ts1, ts2;
@@ -1640,8 +1631,8 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
 	if (!mmc_can_erase(test->card))
 		return RESULT_UNSUP_HOST;
 
-	for (sz = 512; sz < test->area.max_sz; sz <<= 1) {
-		dev_addr = test->area.dev_addr + (sz >> 9);
+	for (sz = 512; sz < t->max_sz; sz <<= 1) {
+		dev_addr = t->dev_addr + (sz >> 9);
 		getnstimeofday(&ts1);
 		ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG);
 		if (ret)
@@ -1649,7 +1640,7 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
 		getnstimeofday(&ts2);
 		mmc_test_print_rate(test, sz, &ts1, &ts2);
 	}
-	dev_addr = test->area.dev_addr;
+	dev_addr = t->dev_addr;
 	getnstimeofday(&ts1);
 	ret = mmc_erase(test->card, dev_addr, sz >> 9, MMC_TRIM_ARG);
 	if (ret)
@@ -1661,12 +1652,13 @@ static int mmc_test_profile_trim_perf(struct mmc_test_card *test)
 
 static int mmc_test_seq_read_perf(struct mmc_test_card *test, unsigned long sz)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned int dev_addr, i, cnt;
 	struct timespec ts1, ts2;
 	int ret;
 
-	cnt = test->area.max_sz / sz;
-	dev_addr = test->area.dev_addr;
+	cnt = t->max_sz / sz;
+	dev_addr = t->dev_addr;
 	getnstimeofday(&ts1);
 	for (i = 0; i < cnt; i++) {
 		ret = mmc_test_area_io(test, sz, dev_addr, 0, 0, 0);
@@ -1684,20 +1676,22 @@ static int mmc_test_seq_read_perf(struct mmc_test_card *test, unsigned long sz)
  */
 static int mmc_test_profile_seq_read_perf(struct mmc_test_card *test)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned long sz;
 	int ret;
 
-	for (sz = 512; sz < test->area.max_tfr; sz <<= 1) {
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
 		ret = mmc_test_seq_read_perf(test, sz);
 		if (ret)
 			return ret;
 	}
-	sz = test->area.max_tfr;
+	sz = t->max_tfr;
 	return mmc_test_seq_read_perf(test, sz);
 }
 
 static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned int dev_addr, i, cnt;
 	struct timespec ts1, ts2;
 	int ret;
@@ -1705,8 +1699,8 @@ static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz)
 	ret = mmc_test_area_erase(test);
 	if (ret)
 		return ret;
-	cnt = test->area.max_sz / sz;
-	dev_addr = test->area.dev_addr;
+	cnt = t->max_sz / sz;
+	dev_addr = t->dev_addr;
 	getnstimeofday(&ts1);
 	for (i = 0; i < cnt; i++) {
 		ret = mmc_test_area_io(test, sz, dev_addr, 1, 0, 0);
@@ -1724,15 +1718,16 @@ static int mmc_test_seq_write_perf(struct mmc_test_card *test, unsigned long sz)
  */
 static int mmc_test_profile_seq_write_perf(struct mmc_test_card *test)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned long sz;
 	int ret;
 
-	for (sz = 512; sz < test->area.max_tfr; sz <<= 1) {
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
 		ret = mmc_test_seq_write_perf(test, sz);
 		if (ret)
 			return ret;
 	}
-	sz = test->area.max_tfr;
+	sz = t->max_tfr;
 	return mmc_test_seq_write_perf(test, sz);
 }
 
@@ -1741,6 +1736,7 @@ static int mmc_test_profile_seq_write_perf(struct mmc_test_card *test)
  */
 static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned long sz;
 	unsigned int dev_addr, i, cnt;
 	struct timespec ts1, ts2;
@@ -1752,15 +1748,15 @@ static int mmc_test_profile_seq_trim_perf(struct mmc_test_card *test)
 	if (!mmc_can_erase(test->card))
 		return RESULT_UNSUP_HOST;
 
-	for (sz = 512; sz <= test->area.max_sz; sz <<= 1) {
+	for (sz = 512; sz <= t->max_sz; sz <<= 1) {
 		ret = mmc_test_area_erase(test);
 		if (ret)
 			return ret;
 		ret = mmc_test_area_fill(test);
 		if (ret)
 			return ret;
-		cnt = test->area.max_sz / sz;
-		dev_addr = test->area.dev_addr;
+		cnt = t->max_sz / sz;
+		dev_addr = t->dev_addr;
 		getnstimeofday(&ts1);
 		for (i = 0; i < cnt; i++) {
 			ret = mmc_erase(test->card, dev_addr, sz >> 9,
@@ -1823,11 +1819,12 @@ static int mmc_test_rnd_perf(struct mmc_test_card *test, int write, int print,
 
 static int mmc_test_random_perf(struct mmc_test_card *test, int write)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned int next;
 	unsigned long sz;
 	int ret;
 
-	for (sz = 512; sz < test->area.max_tfr; sz <<= 1) {
+	for (sz = 512; sz < t->max_tfr; sz <<= 1) {
 		/*
 		 * When writing, try to get more consistent results by running
 		 * the test twice with exactly the same I/O but outputting the
@@ -1844,7 +1841,7 @@ static int mmc_test_random_perf(struct mmc_test_card *test, int write)
 		if (ret)
 			return ret;
 	}
-	sz = test->area.max_tfr;
+	sz = t->max_tfr;
 	if (write) {
 		next = rnd_next;
 		ret = mmc_test_rnd_perf(test, write, 0, sz);
@@ -1874,17 +1871,18 @@ static int mmc_test_random_write_perf(struct mmc_test_card *test)
 static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
 			     unsigned int tot_sz, int max_scatter)
 {
+	struct mmc_test_area *t = &test->area;
 	unsigned int dev_addr, i, cnt, sz, ssz;
 	struct timespec ts1, ts2;
 	int ret;
 
-	sz = test->area.max_tfr;
+	sz = t->max_tfr;
+
 	/*
 	 * In the case of a maximally scattered transfer, the maximum transfer
 	 * size is further limited by using PAGE_SIZE segments.
 	 */
 	if (max_scatter) {
-		struct mmc_test_area *t = &test->area;
 		unsigned long max_tfr;
 
 		if (t->max_seg_sz >= PAGE_SIZE)
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 2ae727568df..c07322c2658 100644
--- a/drivers/mmc/card/queue.c
+++ b/drivers/mmc/card/queue.c
@@ -343,18 +343,14 @@ unsigned int mmc_queue_map_sg(struct mmc_queue *mq)
  */
 void mmc_queue_bounce_pre(struct mmc_queue *mq)
 {
-	unsigned long flags;
-
 	if (!mq->bounce_buf)
 		return;
 
 	if (rq_data_dir(mq->req) != WRITE)
 		return;
 
-	local_irq_save(flags);
 	sg_copy_to_buffer(mq->bounce_sg, mq->bounce_sg_len,
 		mq->bounce_buf, mq->sg[0].length);
-	local_irq_restore(flags);
 }
 
 /*
@@ -363,17 +359,13 @@ void mmc_queue_bounce_pre(struct mmc_queue *mq)
  */
 void mmc_queue_bounce_post(struct mmc_queue *mq)
 {
-	unsigned long flags;
-
 	if (!mq->bounce_buf)
 		return;
 
 	if (rq_data_dir(mq->req) != READ)
 		return;
 
-	local_irq_save(flags);
 	sg_copy_from_buffer(mq->bounce_sg, mq->bounce_sg_len,
 		mq->bounce_buf, mq->sg[0].length);
-	local_irq_restore(flags);
 }
 
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index d6d62fd07ee..393d817ed04 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -274,8 +274,12 @@ int mmc_add_card(struct mmc_card *card)
 		break;
 	case MMC_TYPE_SD:
 		type = "SD";
-		if (mmc_card_blockaddr(card))
-			type = "SDHC";
+		if (mmc_card_blockaddr(card)) {
+			if (mmc_card_ext_capacity(card))
+				type = "SDXC";
+			else
+				type = "SDHC";
+		}
 		break;
 	case MMC_TYPE_SDIO:
 		type = "SDIO";
@@ -299,7 +303,8 @@ int mmc_add_card(struct mmc_card *card)
 	} else {
 		printk(KERN_INFO "%s: new %s%s%s card at address %04x\n",
 			mmc_hostname(card->host),
-			mmc_card_highspeed(card) ? "high speed " : "",
+			mmc_sd_card_uhs(card) ? "ultra high speed " :
+			(mmc_card_highspeed(card) ? "high speed " : ""),
 			mmc_card_ddr_mode(card) ? "DDR " : "",
 			type, card->rca);
 	}
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 1f453acc868..68091dda3f3 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -236,12 +236,10 @@ EXPORT_SYMBOL(mmc_wait_for_req);
  */
 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
 {
-	struct mmc_request mrq;
+	struct mmc_request mrq = {0};
 
 	WARN_ON(!host->claimed);
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-
 	memset(cmd->resp, 0, sizeof(cmd->resp));
 	cmd->retries = retries;
 
@@ -720,22 +718,12 @@ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
 }
 
 /*
- * Change data bus width and DDR mode of a host.
- */
-void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width,
-			   unsigned int ddr)
-{
-	host->ios.bus_width = width;
-	host->ios.ddr = ddr;
-	mmc_set_ios(host);
-}
-
-/*
  * Change data bus width of a host.
  */
 void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
 {
-	mmc_set_bus_width_ddr(host, width, MMC_SDR_MODE);
+	host->ios.bus_width = width;
+	mmc_set_ios(host);
 }
 
 /**
@@ -944,6 +932,38 @@ u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
 	return ocr;
 }
 
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, bool cmd11)
+{
+	struct mmc_command cmd = {0};
+	int err = 0;
+
+	BUG_ON(!host);
+
+	/*
+	 * Send CMD11 only if the request is to switch the card to
+	 * 1.8V signalling.
+	 */
+	if ((signal_voltage != MMC_SIGNAL_VOLTAGE_330) && cmd11) {
+		cmd.opcode = SD_SWITCH_VOLTAGE;
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+		err = mmc_wait_for_cmd(host, &cmd, 0);
+		if (err)
+			return err;
+
+		if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
+			return -EIO;
+	}
+
+	host->ios.signal_voltage = signal_voltage;
+
+	if (host->ops->start_signal_voltage_switch)
+		err = host->ops->start_signal_voltage_switch(host, &host->ios);
+
+	return err;
+}
+
 /*
  * Select timing parameters for host.
  */
@@ -954,6 +974,15 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing)
 }
 
 /*
+ * Select appropriate driver type for host.
+ */
+void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
+{
+	host->ios.drv_type = drv_type;
+	mmc_set_ios(host);
+}
+
+/*
  * Apply power to the MMC stack.  This is a two-stage process.
  * First, we enable power to the card without the clock running.
  * We then wait a bit for the power to stabilise.  Finally,
@@ -1187,9 +1216,8 @@ void mmc_init_erase(struct mmc_card *card)
 	}
 }
 
-static void mmc_set_mmc_erase_timeout(struct mmc_card *card,
-				      struct mmc_command *cmd,
-				      unsigned int arg, unsigned int qty)
+static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
+				          unsigned int arg, unsigned int qty)
 {
 	unsigned int erase_timeout;
 
@@ -1246,44 +1274,48 @@ static void mmc_set_mmc_erase_timeout(struct mmc_card *card,
 	if (mmc_host_is_spi(card->host) && erase_timeout < 1000)
 		erase_timeout = 1000;
 
-	cmd->erase_timeout = erase_timeout;
+	return erase_timeout;
 }
 
-static void mmc_set_sd_erase_timeout(struct mmc_card *card,
-				     struct mmc_command *cmd, unsigned int arg,
-				     unsigned int qty)
+static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
+					 unsigned int arg,
+					 unsigned int qty)
 {
+	unsigned int erase_timeout;
+
 	if (card->ssr.erase_timeout) {
 		/* Erase timeout specified in SD Status Register (SSR) */
-		cmd->erase_timeout = card->ssr.erase_timeout * qty +
-				     card->ssr.erase_offset;
+		erase_timeout = card->ssr.erase_timeout * qty +
+				card->ssr.erase_offset;
 	} else {
 		/*
 		 * Erase timeout not specified in SD Status Register (SSR) so
 		 * use 250ms per write block.
 		 */
-		cmd->erase_timeout = 250 * qty;
+		erase_timeout = 250 * qty;
 	}
 
 	/* Must not be less than 1 second */
-	if (cmd->erase_timeout < 1000)
-		cmd->erase_timeout = 1000;
+	if (erase_timeout < 1000)
+		erase_timeout = 1000;
+
+	return erase_timeout;
 }
 
-static void mmc_set_erase_timeout(struct mmc_card *card,
-				  struct mmc_command *cmd, unsigned int arg,
-				  unsigned int qty)
+static unsigned int mmc_erase_timeout(struct mmc_card *card,
+				      unsigned int arg,
+				      unsigned int qty)
 {
 	if (mmc_card_sd(card))
-		mmc_set_sd_erase_timeout(card, cmd, arg, qty);
+		return mmc_sd_erase_timeout(card, arg, qty);
 	else
-		mmc_set_mmc_erase_timeout(card, cmd, arg, qty);
+		return mmc_mmc_erase_timeout(card, arg, qty);
 }
 
 static int mmc_do_erase(struct mmc_card *card, unsigned int from,
 			unsigned int to, unsigned int arg)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	unsigned int qty = 0;
 	int err;
 
@@ -1317,7 +1349,6 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from,
 		to <<= 9;
 	}
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
 	if (mmc_card_sd(card))
 		cmd.opcode = SD_ERASE_WR_BLK_START;
 	else
@@ -1351,7 +1382,7 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from,
 	cmd.opcode = MMC_ERASE;
 	cmd.arg = arg;
 	cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
-	mmc_set_erase_timeout(card, &cmd, arg, qty);
+	cmd.cmd_timeout_ms = mmc_erase_timeout(card, arg, qty);
 	err = mmc_wait_for_cmd(card->host, &cmd, 0);
 	if (err) {
 		printk(KERN_ERR "mmc_erase: erase error %d, status %#x\n",
@@ -1487,12 +1518,11 @@ EXPORT_SYMBOL(mmc_erase_group_aligned);
 
 int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card))
 		return 0;
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
 	cmd.opcode = MMC_SET_BLOCKLEN;
 	cmd.arg = blocklen;
 	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
@@ -1578,7 +1608,7 @@ void mmc_rescan(struct work_struct *work)
 	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
 		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
 			break;
-		if (freqs[i] < host->f_min)
+		if (freqs[i] <= host->f_min)
 			break;
 	}
 	mmc_release_host(host);
@@ -1746,7 +1776,7 @@ int mmc_suspend_host(struct mmc_host *host)
 	}
 	mmc_bus_put(host);
 
-	if (!err && !(host->pm_flags & MMC_PM_KEEP_POWER))
+	if (!err && !mmc_card_keep_power(host))
 		mmc_power_off(host);
 
 	return err;
@@ -1764,7 +1794,7 @@ int mmc_resume_host(struct mmc_host *host)
 
 	mmc_bus_get(host);
 	if (host->bus_ops && !host->bus_dead) {
-		if (!(host->pm_flags & MMC_PM_KEEP_POWER)) {
+		if (!mmc_card_keep_power(host)) {
 			mmc_power_up(host);
 			mmc_select_voltage(host, host->ocr);
 			/*
@@ -1789,6 +1819,7 @@ int mmc_resume_host(struct mmc_host *host)
 			err = 0;
 		}
 	}
+	host->pm_flags &= ~MMC_PM_KEEP_POWER;
 	mmc_bus_put(host);
 
 	return err;
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 20b1c0831ea..d9411ed2a39 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -38,10 +38,11 @@ void mmc_ungate_clock(struct mmc_host *host);
 void mmc_set_ungated(struct mmc_host *host);
 void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode);
 void mmc_set_bus_width(struct mmc_host *host, unsigned int width);
-void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width,
-			   unsigned int ddr);
 u32 mmc_select_voltage(struct mmc_host *host, u32 ocr);
+int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage,
+			   bool cmd11);
 void mmc_set_timing(struct mmc_host *host, unsigned int timing);
+void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type);
 
 static inline void mmc_delay(unsigned int ms)
 {
@@ -61,8 +62,6 @@ int mmc_attach_mmc(struct mmc_host *host);
 int mmc_attach_sd(struct mmc_host *host);
 int mmc_attach_sdio(struct mmc_host *host);
 
-void mmc_fixup_device(struct mmc_card *card);
-
 /* Module parameters */
 extern int use_spi_crc;
 
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 461e6a17fb9..b29d3e8fd3a 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -325,12 +325,12 @@ int mmc_add_host(struct mmc_host *host)
 	WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
 		!host->ops->enable_sdio_irq);
 
-	led_trigger_register_simple(dev_name(&host->class_dev), &host->led);
-
 	err = device_add(&host->class_dev);
 	if (err)
 		return err;
 
+	led_trigger_register_simple(dev_name(&host->class_dev), &host->led);
+
 #ifdef CONFIG_DEBUG_FS
 	mmc_add_host_debugfs(host);
 #endif
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 772d0d0a541..2a7e43bc796 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -20,6 +20,7 @@
 #include "core.h"
 #include "bus.h"
 #include "mmc_ops.h"
+#include "sd_ops.h"
 
 static const unsigned int tran_exp[] = {
 	10000,		100000,		1000000,	10000000,
@@ -173,14 +174,17 @@ static int mmc_decode_csd(struct mmc_card *card)
 }
 
 /*
- * Read and decode extended CSD.
+ * Read extended CSD.
  */
-static int mmc_read_ext_csd(struct mmc_card *card)
+static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
 {
 	int err;
 	u8 *ext_csd;
 
 	BUG_ON(!card);
+	BUG_ON(!new_ext_csd);
+
+	*new_ext_csd = NULL;
 
 	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
 		return 0;
@@ -198,12 +202,15 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 
 	err = mmc_send_ext_csd(card, ext_csd);
 	if (err) {
+		kfree(ext_csd);
+		*new_ext_csd = NULL;
+
 		/* If the host or the card can't do the switch,
 		 * fail more gracefully. */
 		if ((err != -EINVAL)
 		 && (err != -ENOSYS)
 		 && (err != -EFAULT))
-			goto out;
+			return err;
 
 		/*
 		 * High capacity cards should have this "magic" size
@@ -221,9 +228,23 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 				mmc_hostname(card->host));
 			err = 0;
 		}
+	} else
+		*new_ext_csd = ext_csd;
 
-		goto out;
-	}
+	return err;
+}
+
+/*
+ * Decode extended CSD.
+ */
+static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
+{
+	int err = 0;
+
+	BUG_ON(!card);
+
+	if (!ext_csd)
+		return 0;
 
 	/* Version is coded in the CSD_STRUCTURE byte in the EXT_CSD register */
 	if (card->csd.structure == 3) {
@@ -288,6 +309,10 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 
 	if (card->ext_csd.rev >= 3) {
 		u8 sa_shift = ext_csd[EXT_CSD_S_A_TIMEOUT];
+		card->ext_csd.part_config = ext_csd[EXT_CSD_PART_CONFIG];
+
+		/* EXT_CSD value is in units of 10ms, but we store in ms */
+		card->ext_csd.part_time = 10 * ext_csd[EXT_CSD_PART_SWITCH_TIME];
 
 		/* Sleep / awake timeout in 100ns units */
 		if (sa_shift > 0 && sa_shift <= 0x17)
@@ -299,6 +324,14 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 			ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT];
 		card->ext_csd.hc_erase_size =
 			ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] << 10;
+
+		card->ext_csd.rel_sectors = ext_csd[EXT_CSD_REL_WR_SEC_C];
+
+		/*
+		 * There are two boot regions of equal size, defined in
+		 * multiples of 128K.
+		 */
+		card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
 	}
 
 	if (card->ext_csd.rev >= 4) {
@@ -350,14 +383,78 @@ static int mmc_read_ext_csd(struct mmc_card *card)
 			ext_csd[EXT_CSD_TRIM_MULT];
 	}
 
+	if (card->ext_csd.rev >= 5)
+		card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
+
 	if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
 		card->erased_byte = 0xFF;
 	else
 		card->erased_byte = 0x0;
 
 out:
+	return err;
+}
+
+static inline void mmc_free_ext_csd(u8 *ext_csd)
+{
 	kfree(ext_csd);
+}
+
+
+static int mmc_compare_ext_csds(struct mmc_card *card, u8 *ext_csd,
+			unsigned bus_width)
+{
+	u8 *bw_ext_csd;
+	int err;
+
+	err = mmc_get_ext_csd(card, &bw_ext_csd);
+	if (err)
+		return err;
+
+	if ((ext_csd == NULL || bw_ext_csd == NULL)) {
+		if (bus_width != MMC_BUS_WIDTH_1)
+			err = -EINVAL;
+		goto out;
+	}
 
+	if (bus_width == MMC_BUS_WIDTH_1)
+		goto out;
+
+	/* only compare read only fields */
+	err = (!(ext_csd[EXT_CSD_PARTITION_SUPPORT] ==
+			bw_ext_csd[EXT_CSD_PARTITION_SUPPORT]) &&
+		(ext_csd[EXT_CSD_ERASED_MEM_CONT] ==
+			bw_ext_csd[EXT_CSD_ERASED_MEM_CONT]) &&
+		(ext_csd[EXT_CSD_REV] ==
+			bw_ext_csd[EXT_CSD_REV]) &&
+		(ext_csd[EXT_CSD_STRUCTURE] ==
+			bw_ext_csd[EXT_CSD_STRUCTURE]) &&
+		(ext_csd[EXT_CSD_CARD_TYPE] ==
+			bw_ext_csd[EXT_CSD_CARD_TYPE]) &&
+		(ext_csd[EXT_CSD_S_A_TIMEOUT] ==
+			bw_ext_csd[EXT_CSD_S_A_TIMEOUT]) &&
+		(ext_csd[EXT_CSD_HC_WP_GRP_SIZE] ==
+			bw_ext_csd[EXT_CSD_HC_WP_GRP_SIZE]) &&
+		(ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT] ==
+			bw_ext_csd[EXT_CSD_ERASE_TIMEOUT_MULT]) &&
+		(ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] ==
+			bw_ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]) &&
+		(ext_csd[EXT_CSD_SEC_TRIM_MULT] ==
+			bw_ext_csd[EXT_CSD_SEC_TRIM_MULT]) &&
+		(ext_csd[EXT_CSD_SEC_ERASE_MULT] ==
+			bw_ext_csd[EXT_CSD_SEC_ERASE_MULT]) &&
+		(ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT] ==
+			bw_ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT]) &&
+		(ext_csd[EXT_CSD_TRIM_MULT] ==
+			bw_ext_csd[EXT_CSD_TRIM_MULT]) &&
+		memcmp(&ext_csd[EXT_CSD_SEC_CNT],
+		       &bw_ext_csd[EXT_CSD_SEC_CNT],
+		       4) != 0);
+	if (err)
+		err = -EINVAL;
+
+out:
+	mmc_free_ext_csd(bw_ext_csd);
 	return err;
 }
 
@@ -422,6 +519,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	u32 cid[4];
 	unsigned int max_dtr;
 	u32 rocr;
+	u8 *ext_csd = NULL;
 
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
@@ -520,7 +618,11 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 		/*
 		 * Fetch and process extended CSD.
 		 */
-		err = mmc_read_ext_csd(card);
+
+		err = mmc_get_ext_csd(card, &ext_csd);
+		if (err)
+			goto free_card;
+		err = mmc_read_ext_csd(card, ext_csd);
 		if (err)
 			goto free_card;
 
@@ -542,7 +644,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 */
 	if (card->ext_csd.enhanced_area_en) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-				EXT_CSD_ERASE_GROUP_DEF, 1);
+				 EXT_CSD_ERASE_GROUP_DEF, 1, 0);
 
 		if (err && err != -EBADMSG)
 			goto free_card;
@@ -568,12 +670,24 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	}
 
 	/*
+	 * Ensure eMMC user default partition is enabled
+	 */
+	if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
+		card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
+				 card->ext_csd.part_config,
+				 card->ext_csd.part_time);
+		if (err && err != -EBADMSG)
+			goto free_card;
+	}
+
+	/*
 	 * Activate high speed (if supported)
 	 */
 	if ((card->ext_csd.hs_max_dtr != 0) &&
 		(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
 		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-			EXT_CSD_HS_TIMING, 1);
+				 EXT_CSD_HS_TIMING, 1, 0);
 		if (err && err != -EBADMSG)
 			goto free_card;
 
@@ -606,10 +720,14 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 */
 	if (mmc_card_highspeed(card)) {
 		if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
-			&& (host->caps & (MMC_CAP_1_8V_DDR)))
+			&& ((host->caps & (MMC_CAP_1_8V_DDR |
+			     MMC_CAP_UHS_DDR50))
+				== (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
 				ddr = MMC_1_8V_DDR_MODE;
 		else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
-			&& (host->caps & (MMC_CAP_1_2V_DDR)))
+			&& ((host->caps & (MMC_CAP_1_2V_DDR |
+			     MMC_CAP_UHS_DDR50))
+				== (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
 				ddr = MMC_1_2V_DDR_MODE;
 	}
 
@@ -640,18 +758,22 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 				ddr = 0; /* no DDR for 1-bit width */
 			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 					 EXT_CSD_BUS_WIDTH,
-					 ext_csd_bits[idx][0]);
+					 ext_csd_bits[idx][0],
+					 0);
 			if (!err) {
-				mmc_set_bus_width_ddr(card->host,
-						      bus_width, MMC_SDR_MODE);
+				mmc_set_bus_width(card->host, bus_width);
+
 				/*
 				 * If controller can't handle bus width test,
-				 * use the highest bus width to maintain
-				 * compatibility with previous MMC behavior.
+				 * compare ext_csd previously read in 1 bit mode
+				 * against ext_csd at new bus width
 				 */
 				if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
-					break;
-				err = mmc_bus_test(card, bus_width);
+					err = mmc_compare_ext_csds(card,
+						ext_csd,
+						bus_width);
+				else
+					err = mmc_bus_test(card, bus_width);
 				if (!err)
 					break;
 			}
@@ -659,8 +781,9 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 
 		if (!err && ddr) {
 			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
-					EXT_CSD_BUS_WIDTH,
-					ext_csd_bits[idx][1]);
+					 EXT_CSD_BUS_WIDTH,
+					 ext_csd_bits[idx][1],
+					 0);
 		}
 		if (err) {
 			printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
@@ -668,20 +791,43 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 				1 << bus_width, ddr);
 			goto free_card;
 		} else if (ddr) {
+			/*
+			 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
+			 * signaling.
+			 *
+			 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
+			 *
+			 * 1.8V vccq at 3.3V core voltage (vcc) is not required
+			 * in the JEDEC spec for DDR.
+			 *
+			 * Do not force change in vccq since we are obviously
+			 * working and no change to vccq is needed.
+			 *
+			 * WARNING: eMMC rules are NOT the same as SD DDR
+			 */
+			if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
+				err = mmc_set_signal_voltage(host,
+					MMC_SIGNAL_VOLTAGE_120, 0);
+				if (err)
+					goto err;
+			}
 			mmc_card_set_ddr_mode(card);
-			mmc_set_bus_width_ddr(card->host, bus_width, ddr);
+			mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
+			mmc_set_bus_width(card->host, bus_width);
 		}
 	}
 
 	if (!oldcard)
 		host->card = card;
 
+	mmc_free_ext_csd(ext_csd);
 	return 0;
 
 free_card:
 	if (!oldcard)
 		mmc_remove_card(card);
 err:
+	mmc_free_ext_csd(ext_csd);
 
 	return err;
 }
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index f3b22bf89cc..845ce7c533b 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -23,12 +23,10 @@
 static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SELECT_CARD;
 
 	if (card) {
@@ -60,15 +58,13 @@ int mmc_deselect_cards(struct mmc_host *host)
 
 int mmc_card_sleepawake(struct mmc_host *host, int sleep)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	struct mmc_card *card = host->card;
 	int err;
 
 	if (sleep)
 		mmc_deselect_cards(host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SLEEP_AWAKE;
 	cmd.arg = card->rca << 16;
 	if (sleep)
@@ -97,7 +93,7 @@ int mmc_card_sleepawake(struct mmc_host *host, int sleep)
 int mmc_go_idle(struct mmc_host *host)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	/*
 	 * Non-SPI hosts need to prevent chipselect going active during
@@ -113,8 +109,6 @@ int mmc_go_idle(struct mmc_host *host)
 		mmc_delay(1);
 	}
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_GO_IDLE_STATE;
 	cmd.arg = 0;
 	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
@@ -135,13 +129,11 @@ int mmc_go_idle(struct mmc_host *host)
 
 int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int i, err = 0;
 
 	BUG_ON(!host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SEND_OP_COND;
 	cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
 	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
@@ -178,13 +170,11 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!host);
 	BUG_ON(!cid);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_ALL_SEND_CID;
 	cmd.arg = 0;
 	cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
@@ -201,13 +191,11 @@ int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
 int mmc_set_relative_addr(struct mmc_card *card)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SET_RELATIVE_ADDR;
 	cmd.arg = card->rca << 16;
 	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
@@ -223,13 +211,11 @@ static int
 mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!host);
 	BUG_ON(!cxd);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = opcode;
 	cmd.arg = arg;
 	cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
@@ -247,9 +233,9 @@ static int
 mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 		u32 opcode, void *buf, unsigned len)
 {
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	struct scatterlist sg;
 	void *data_buf;
 
@@ -260,10 +246,6 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 	if (data_buf == NULL)
 		return -ENOMEM;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 
@@ -355,11 +337,9 @@ int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
 
 int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int err;
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SPI_READ_OCR;
 	cmd.arg = highcap ? (1 << 30) : 0;
 	cmd.flags = MMC_RSP_SPI_R3;
@@ -372,11 +352,9 @@ int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
 
 int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int err;
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SPI_CRC_ON_OFF;
 	cmd.flags = MMC_RSP_SPI_R1;
 	cmd.arg = use_crc;
@@ -387,23 +365,34 @@ int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
 	return err;
 }
 
-int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
+/**
+ *	mmc_switch - modify EXT_CSD register
+ *	@card: the MMC card associated with the data transfer
+ *	@set: cmd set values
+ *	@index: EXT_CSD register index
+ *	@value: value to program into EXT_CSD register
+ *	@timeout_ms: timeout (ms) for operation performed by register write,
+ *                   timeout of zero implies maximum possible timeout
+ *
+ *	Modifies the EXT_CSD register for selected card.
+ */
+int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
+	       unsigned int timeout_ms)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	u32 status;
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SWITCH;
 	cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
 		  (index << 16) |
 		  (value << 8) |
 		  set;
 	cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+	cmd.cmd_timeout_ms = timeout_ms;
 
 	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
 	if (err)
@@ -433,17 +422,16 @@ int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mmc_switch);
 
 int mmc_send_status(struct mmc_card *card, u32 *status)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = MMC_SEND_STATUS;
 	if (!mmc_host_is_spi(card->host))
 		cmd.arg = card->rca << 16;
@@ -466,9 +454,9 @@ static int
 mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
 		  u8 len)
 {
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	struct scatterlist sg;
 	u8 *data_buf;
 	u8 *test_buf;
@@ -497,10 +485,6 @@ mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
 	if (opcode == MMC_BUS_TEST_W)
 		memcpy(data_buf, test_buf, len);
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 	cmd.opcode = opcode;
diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
index e6d44b8a18d..9276946fa5b 100644
--- a/drivers/mmc/core/mmc_ops.h
+++ b/drivers/mmc/core/mmc_ops.h
@@ -20,7 +20,6 @@ int mmc_all_send_cid(struct mmc_host *host, u32 *cid);
 int mmc_set_relative_addr(struct mmc_card *card);
 int mmc_send_csd(struct mmc_card *card, u32 *csd);
 int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
-int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value);
 int mmc_send_status(struct mmc_card *card, u32 *status);
 int mmc_send_cid(struct mmc_host *host, u32 *cid);
 int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
diff --git a/drivers/mmc/core/quirks.c b/drivers/mmc/core/quirks.c
index 11118b74eb2..3a596217029 100644
--- a/drivers/mmc/core/quirks.c
+++ b/drivers/mmc/core/quirks.c
@@ -1,7 +1,8 @@
 /*
- *  This file contains work-arounds for many known sdio hardware
- *  bugs.
+ *  This file contains work-arounds for many known SD/MMC
+ *  and SDIO hardware bugs.
  *
+ *  Copyright (c) 2011 Andrei Warkentin <andreiw@motorola.com>
  *  Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com>
  *  Inspired from pci fixup code:
  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
@@ -11,34 +12,14 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/mmc/card.h>
-#include <linux/mod_devicetable.h>
 
-/*
- *  The world is not perfect and supplies us with broken mmc/sdio devices.
- *  For at least a part of these bugs we need a work-around
- */
-
-struct mmc_fixup {
-	u16 vendor, device;	/* You can use SDIO_ANY_ID here of course */
-	void (*vendor_fixup)(struct mmc_card *card, int data);
-	int data;
-};
-
-/*
- * This hook just adds a quirk unconditionnally
- */
-static void __maybe_unused add_quirk(struct mmc_card *card, int data)
-{
-	card->quirks |= data;
-}
+#ifndef SDIO_VENDOR_ID_TI
+#define SDIO_VENDOR_ID_TI		0x0097
+#endif
 
-/*
- * This hook just removes a quirk unconditionnally
- */
-static void __maybe_unused remove_quirk(struct mmc_card *card, int data)
-{
-	card->quirks &= ~data;
-}
+#ifndef SDIO_DEVICE_ID_TI_WL1271
+#define SDIO_DEVICE_ID_TI_WL1271	0x4076
+#endif
 
 /*
  * This hook just adds a quirk for all sdio devices
@@ -49,33 +30,47 @@ static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
 		card->quirks |= data;
 }
 
-#ifndef SDIO_VENDOR_ID_TI
-#define SDIO_VENDOR_ID_TI		0x0097
-#endif
-
-#ifndef SDIO_DEVICE_ID_TI_WL1271
-#define SDIO_DEVICE_ID_TI_WL1271	0x4076
-#endif
-
 static const struct mmc_fixup mmc_fixup_methods[] = {
 	/* by default sdio devices are considered CLK_GATING broken */
 	/* good cards will be whitelisted as they are tested */
-	{ SDIO_ANY_ID, SDIO_ANY_ID,
-		add_quirk_for_sdio_devices, MMC_QUIRK_BROKEN_CLK_GATING },
-	{ SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
-		remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING },
-	{ 0 }
+	SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,
+		   add_quirk_for_sdio_devices,
+		   MMC_QUIRK_BROKEN_CLK_GATING),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		   remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		   add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),
+
+	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
+		   add_quirk, MMC_QUIRK_DISABLE_CD),
+
+	END_FIXUP
 };
 
-void mmc_fixup_device(struct mmc_card *card)
+void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
 {
 	const struct mmc_fixup *f;
+	u64 rev = cid_rev_card(card);
+
+	/* Non-core specific workarounds. */
+	if (!table)
+		table = mmc_fixup_methods;
 
-	for (f = mmc_fixup_methods; f->vendor_fixup; f++) {
-		if ((f->vendor == card->cis.vendor
-		     || f->vendor == (u16) SDIO_ANY_ID) &&
-		    (f->device == card->cis.device
-		     || f->device == (u16) SDIO_ANY_ID)) {
+	for (f = table; f->vendor_fixup; f++) {
+		if ((f->manfid == CID_MANFID_ANY ||
+		     f->manfid == card->cid.manfid) &&
+		    (f->oemid == CID_OEMID_ANY ||
+		     f->oemid == card->cid.oemid) &&
+		    (f->name == CID_NAME_ANY ||
+		     !strncmp(f->name, card->cid.prod_name,
+			      sizeof(card->cid.prod_name))) &&
+		    (f->cis_vendor == card->cis.vendor ||
+		     f->cis_vendor == (u16) SDIO_ANY_ID) &&
+		    (f->cis_device == card->cis.device ||
+		     f->cis_device == (u16) SDIO_ANY_ID) &&
+		    rev >= f->rev_start && rev <= f->rev_end) {
 			dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
 			f->vendor_fixup(card, f->data);
 		}
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 6dac89fe053..ff2774128aa 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -130,7 +130,7 @@ static int mmc_decode_csd(struct mmc_card *card)
 		break;
 	case 1:
 		/*
-		 * This is a block-addressed SDHC card. Most
+		 * This is a block-addressed SDHC or SDXC card. Most
 		 * interesting fields are unused and have fixed
 		 * values. To avoid getting tripped by buggy cards,
 		 * we assume those fixed values ourselves.
@@ -144,6 +144,11 @@ static int mmc_decode_csd(struct mmc_card *card)
 		e = UNSTUFF_BITS(resp, 96, 3);
 		csd->max_dtr	  = tran_exp[e] * tran_mant[m];
 		csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);
+		csd->c_size	  = UNSTUFF_BITS(resp, 48, 22);
+
+		/* SDXC cards have a minimum C_SIZE of 0x00FFFF */
+		if (csd->c_size >= 0xFFFF)
+			mmc_card_set_ext_capacity(card);
 
 		m = UNSTUFF_BITS(resp, 48, 22);
 		csd->capacity     = (1 + m) << 10;
@@ -189,12 +194,17 @@ static int mmc_decode_scr(struct mmc_card *card)
 
 	scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
 	scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
+	if (scr->sda_vsn == SCR_SPEC_VER_2)
+		/* Check if Physical Layer Spec v3.0 is supported */
+		scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
 
 	if (UNSTUFF_BITS(resp, 55, 1))
 		card->erased_byte = 0xFF;
 	else
 		card->erased_byte = 0x0;
 
+	if (scr->sda_spec3)
+		scr->cmds = UNSTUFF_BITS(resp, 32, 2);
 	return 0;
 }
 
@@ -274,29 +284,74 @@ static int mmc_read_switch(struct mmc_card *card)
 	status = kmalloc(64, GFP_KERNEL);
 	if (!status) {
 		printk(KERN_ERR "%s: could not allocate a buffer for "
-			"switch capabilities.\n", mmc_hostname(card->host));
+			"switch capabilities.\n",
+			mmc_hostname(card->host));
 		return -ENOMEM;
 	}
 
+	/* Find out the supported Bus Speed Modes. */
 	err = mmc_sd_switch(card, 0, 0, 1, status);
 	if (err) {
-		/* If the host or the card can't do the switch,
-		 * fail more gracefully. */
-		if ((err != -EINVAL)
-		 && (err != -ENOSYS)
-		 && (err != -EFAULT))
+		/*
+		 * If the host or the card can't do the switch,
+		 * fail more gracefully.
+		 */
+		if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
 			goto out;
 
-		printk(KERN_WARNING "%s: problem reading switch "
-			"capabilities, performance might suffer.\n",
+		printk(KERN_WARNING "%s: problem reading Bus Speed modes.\n",
 			mmc_hostname(card->host));
 		err = 0;
 
 		goto out;
 	}
 
-	if (status[13] & 0x02)
-		card->sw_caps.hs_max_dtr = 50000000;
+	if (card->scr.sda_spec3) {
+		card->sw_caps.sd3_bus_mode = status[13];
+
+		/* Find out Driver Strengths supported by the card */
+		err = mmc_sd_switch(card, 0, 2, 1, status);
+		if (err) {
+			/*
+			 * If the host or the card can't do the switch,
+			 * fail more gracefully.
+			 */
+			if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+				goto out;
+
+			printk(KERN_WARNING "%s: problem reading "
+				"Driver Strength.\n",
+				mmc_hostname(card->host));
+			err = 0;
+
+			goto out;
+		}
+
+		card->sw_caps.sd3_drv_type = status[9];
+
+		/* Find out Current Limits supported by the card */
+		err = mmc_sd_switch(card, 0, 3, 1, status);
+		if (err) {
+			/*
+			 * If the host or the card can't do the switch,
+			 * fail more gracefully.
+			 */
+			if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+				goto out;
+
+			printk(KERN_WARNING "%s: problem reading "
+				"Current Limit.\n",
+				mmc_hostname(card->host));
+			err = 0;
+
+			goto out;
+		}
+
+		card->sw_caps.sd3_curr_limit = status[7];
+	} else {
+		if (status[13] & 0x02)
+			card->sw_caps.hs_max_dtr = 50000000;
+	}
 
 out:
 	kfree(status);
@@ -352,6 +407,232 @@ out:
 	return err;
 }
 
+static int sd_select_driver_type(struct mmc_card *card, u8 *status)
+{
+	int host_drv_type = 0, card_drv_type = 0;
+	int err;
+
+	/*
+	 * If the host doesn't support any of the Driver Types A,C or D,
+	 * default Driver Type B is used.
+	 */
+	if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
+	    | MMC_CAP_DRIVER_TYPE_D)))
+		return 0;
+
+	if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) {
+		host_drv_type = MMC_SET_DRIVER_TYPE_A;
+		if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
+			card_drv_type = MMC_SET_DRIVER_TYPE_A;
+		else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B)
+			card_drv_type = MMC_SET_DRIVER_TYPE_B;
+		else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+			card_drv_type = MMC_SET_DRIVER_TYPE_C;
+	} else if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) {
+		host_drv_type = MMC_SET_DRIVER_TYPE_C;
+		if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+			card_drv_type = MMC_SET_DRIVER_TYPE_C;
+	} else if (!(card->host->caps & MMC_CAP_DRIVER_TYPE_D)) {
+		/*
+		 * If we are here, that means only the default driver type
+		 * B is supported by the host.
+		 */
+		host_drv_type = MMC_SET_DRIVER_TYPE_B;
+		if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B)
+			card_drv_type = MMC_SET_DRIVER_TYPE_B;
+		else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+			card_drv_type = MMC_SET_DRIVER_TYPE_C;
+	}
+
+	err = mmc_sd_switch(card, 1, 2, card_drv_type, status);
+	if (err)
+		return err;
+
+	if ((status[15] & 0xF) != card_drv_type) {
+		printk(KERN_WARNING "%s: Problem setting driver strength!\n",
+			mmc_hostname(card->host));
+		return 0;
+	}
+
+	mmc_set_driver_type(card->host, host_drv_type);
+
+	return 0;
+}
+
+static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
+{
+	unsigned int bus_speed = 0, timing = 0;
+	int err;
+
+	/*
+	 * If the host doesn't support any of the UHS-I modes, fallback on
+	 * default speed.
+	 */
+	if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+	    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)))
+		return 0;
+
+	if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
+	    (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
+			bus_speed = UHS_SDR104_BUS_SPEED;
+			timing = MMC_TIMING_UHS_SDR104;
+			card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
+	} else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
+			bus_speed = UHS_DDR50_BUS_SPEED;
+			timing = MMC_TIMING_UHS_DDR50;
+			card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR50)) {
+			bus_speed = UHS_SDR50_BUS_SPEED;
+			timing = MMC_TIMING_UHS_SDR50;
+			card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
+		   (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
+			bus_speed = UHS_SDR25_BUS_SPEED;
+			timing = MMC_TIMING_UHS_SDR25;
+			card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+	} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+		    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
+		    MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
+		    SD_MODE_UHS_SDR12)) {
+			bus_speed = UHS_SDR12_BUS_SPEED;
+			timing = MMC_TIMING_UHS_SDR12;
+			card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+	}
+
+	card->sd_bus_speed = bus_speed;
+	err = mmc_sd_switch(card, 1, 0, bus_speed, status);
+	if (err)
+		return err;
+
+	if ((status[16] & 0xF) != bus_speed)
+		printk(KERN_WARNING "%s: Problem setting bus speed mode!\n",
+			mmc_hostname(card->host));
+	else {
+		mmc_set_timing(card->host, timing);
+		mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
+	}
+
+	return 0;
+}
+
+static int sd_set_current_limit(struct mmc_card *card, u8 *status)
+{
+	int current_limit = 0;
+	int err;
+
+	/*
+	 * Current limit switch is only defined for SDR50, SDR104, and DDR50
+	 * bus speed modes. For other bus speed modes, we set the default
+	 * current limit of 200mA.
+	 */
+	if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) ||
+	    (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) ||
+	    (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) {
+		if (card->host->caps & MMC_CAP_MAX_CURRENT_800) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
+				current_limit = SD_SET_CURRENT_LIMIT_800;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_600)
+				current_limit = SD_SET_CURRENT_LIMIT_600;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_400)
+				current_limit = SD_SET_CURRENT_LIMIT_400;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		} else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
+				current_limit = SD_SET_CURRENT_LIMIT_600;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_400)
+				current_limit = SD_SET_CURRENT_LIMIT_400;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		} else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
+				current_limit = SD_SET_CURRENT_LIMIT_400;
+			else if (card->sw_caps.sd3_curr_limit &
+					SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		} else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) {
+			if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
+				current_limit = SD_SET_CURRENT_LIMIT_200;
+		}
+	} else
+		current_limit = SD_SET_CURRENT_LIMIT_200;
+
+	err = mmc_sd_switch(card, 1, 3, current_limit, status);
+	if (err)
+		return err;
+
+	if (((status[15] >> 4) & 0x0F) != current_limit)
+		printk(KERN_WARNING "%s: Problem setting current limit!\n",
+			mmc_hostname(card->host));
+
+	return 0;
+}
+
+/*
+ * UHS-I specific initialization procedure
+ */
+static int mmc_sd_init_uhs_card(struct mmc_card *card)
+{
+	int err;
+	u8 *status;
+
+	if (!card->scr.sda_spec3)
+		return 0;
+
+	if (!(card->csd.cmdclass & CCC_SWITCH))
+		return 0;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status) {
+		printk(KERN_ERR "%s: could not allocate a buffer for "
+			"switch capabilities.\n", mmc_hostname(card->host));
+		return -ENOMEM;
+	}
+
+	/* Set 4-bit bus width */
+	if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
+	    (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+		err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+		if (err)
+			goto out;
+
+		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+	}
+
+	/* Set the driver strength for the card */
+	err = sd_select_driver_type(card, status);
+	if (err)
+		goto out;
+
+	/* Set bus speed mode of the card */
+	err = sd_set_bus_speed_mode(card, status);
+	if (err)
+		goto out;
+
+	/* Set current limit for the card */
+	err = sd_set_current_limit(card, status);
+	if (err)
+		goto out;
+
+	/* SPI mode doesn't define CMD19 */
+	if (!mmc_host_is_spi(card->host) && card->host->ops->execute_tuning)
+		err = card->host->ops->execute_tuning(card->host);
+
+out:
+	kfree(status);
+
+	return err;
+}
+
 MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
 	card->raw_cid[2], card->raw_cid[3]);
 MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
@@ -400,7 +681,7 @@ struct device_type sd_type = {
 /*
  * Fetch CID from card.
  */
-int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid)
+int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
 {
 	int err;
 
@@ -420,12 +701,39 @@ int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid)
 	 */
 	err = mmc_send_if_cond(host, ocr);
 	if (!err)
-		ocr |= 1 << 30;
+		ocr |= SD_OCR_CCS;
+
+	/*
+	 * If the host supports one of UHS-I modes, request the card
+	 * to switch to 1.8V signaling level.
+	 */
+	if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+	    MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))
+		ocr |= SD_OCR_S18R;
+
+	/* If the host can supply more than 150mA, XPC should be set to 1. */
+	if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 |
+	    MMC_CAP_SET_XPC_180))
+		ocr |= SD_OCR_XPC;
 
-	err = mmc_send_app_op_cond(host, ocr, NULL);
+try_again:
+	err = mmc_send_app_op_cond(host, ocr, rocr);
 	if (err)
 		return err;
 
+	/*
+	 * In case CCS and S18A in the response is set, start Signal Voltage
+	 * Switch procedure. SPI mode doesn't support CMD11.
+	 */
+	if (!mmc_host_is_spi(host) && rocr &&
+	   ((*rocr & 0x41000000) == 0x41000000)) {
+		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180, true);
+		if (err) {
+			ocr &= ~SD_OCR_S18R;
+			goto try_again;
+		}
+	}
+
 	if (mmc_host_is_spi(host))
 		err = mmc_send_cid(host, cid);
 	else
@@ -553,11 +861,12 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 	struct mmc_card *card;
 	int err;
 	u32 cid[4];
+	u32 rocr = 0;
 
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
 
-	err = mmc_sd_get_cid(host, ocr, cid);
+	err = mmc_sd_get_cid(host, ocr, cid, &rocr);
 	if (err)
 		return err;
 
@@ -610,30 +919,47 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
 	if (err)
 		goto free_card;
 
-	/*
-	 * Attempt to change to high-speed (if supported)
-	 */
-	err = mmc_sd_switch_hs(card);
-	if (err > 0)
-		mmc_sd_go_highspeed(card);
-	else if (err)
-		goto free_card;
+	/* Initialization sequence for UHS-I cards */
+	if (rocr & SD_ROCR_S18A) {
+		err = mmc_sd_init_uhs_card(card);
+		if (err)
+			goto free_card;
 
-	/*
-	 * Set bus speed.
-	 */
-	mmc_set_clock(host, mmc_sd_get_max_clock(card));
+		/* Card is an ultra-high-speed card */
+		mmc_sd_card_set_uhs(card);
 
-	/*
-	 * Switch to wider bus (if supported).
-	 */
-	if ((host->caps & MMC_CAP_4_BIT_DATA) &&
-		(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
-		err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
-		if (err)
+		/*
+		 * Since initialization is now complete, enable preset
+		 * value registers for UHS-I cards.
+		 */
+		if (host->ops->enable_preset_value)
+			host->ops->enable_preset_value(host, true);
+	} else {
+		/*
+		 * Attempt to change to high-speed (if supported)
+		 */
+		err = mmc_sd_switch_hs(card);
+		if (err > 0)
+			mmc_sd_go_highspeed(card);
+		else if (err)
 			goto free_card;
 
-		mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+		/*
+		 * Set bus speed.
+		 */
+		mmc_set_clock(host, mmc_sd_get_max_clock(card));
+
+		/*
+		 * Switch to wider bus (if supported).
+		 */
+		if ((host->caps & MMC_CAP_4_BIT_DATA) &&
+			(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+			err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+			if (err)
+				goto free_card;
+
+			mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+		}
 	}
 
 	host->card = card;
@@ -773,6 +1099,15 @@ int mmc_attach_sd(struct mmc_host *host)
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
 
+	/* Make sure we are at 3.3V signalling voltage */
+	err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false);
+	if (err)
+		return err;
+
+	/* Disable preset value enable if already set since last time */
+	if (host->ops->enable_preset_value)
+		host->ops->enable_preset_value(host, false);
+
 	err = mmc_send_app_op_cond(host, 0, &ocr);
 	if (err)
 		return err;
diff --git a/drivers/mmc/core/sd.h b/drivers/mmc/core/sd.h
index 3d8800fa760..4b34b24f3f7 100644
--- a/drivers/mmc/core/sd.h
+++ b/drivers/mmc/core/sd.h
@@ -5,7 +5,7 @@
 
 extern struct device_type sd_type;
 
-int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid);
+int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr);
 int mmc_sd_get_csd(struct mmc_host *host, struct mmc_card *card);
 void mmc_decode_cid(struct mmc_card *card);
 int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 76af349c14b..021fed15380 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -21,10 +21,10 @@
 #include "core.h"
 #include "sd_ops.h"
 
-static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
+int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!host);
 	BUG_ON(card && (card->host != host));
@@ -49,6 +49,7 @@ static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(mmc_app_cmd);
 
 /**
  *	mmc_wait_for_app_cmd - start an application command and wait for
@@ -66,7 +67,7 @@ static int mmc_app_cmd(struct mmc_host *host, struct mmc_card *card)
 int mmc_wait_for_app_cmd(struct mmc_host *host, struct mmc_card *card,
 	struct mmc_command *cmd, int retries)
 {
-	struct mmc_request mrq;
+	struct mmc_request mrq = {0};
 
 	int i, err;
 
@@ -119,13 +120,11 @@ EXPORT_SYMBOL(mmc_wait_for_app_cmd);
 int mmc_app_set_bus_width(struct mmc_card *card, int width)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = SD_APP_SET_BUS_WIDTH;
 	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
 
@@ -149,13 +148,11 @@ int mmc_app_set_bus_width(struct mmc_card *card, int width)
 
 int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int i, err = 0;
 
 	BUG_ON(!host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = SD_APP_OP_COND;
 	if (mmc_host_is_spi(host))
 		cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
@@ -194,7 +191,7 @@ int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 
 int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int err;
 	static const u8 test_pattern = 0xAA;
 	u8 result_pattern;
@@ -226,13 +223,11 @@ int mmc_send_if_cond(struct mmc_host *host, u32 ocr)
 int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
 {
 	int err;
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 
 	BUG_ON(!host);
 	BUG_ON(!rca);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = SD_SEND_RELATIVE_ADDR;
 	cmd.arg = 0;
 	cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
@@ -249,9 +244,9 @@ int mmc_send_relative_addr(struct mmc_host *host, unsigned int *rca)
 int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 {
 	int err;
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	struct scatterlist sg;
 	void *data_buf;
 
@@ -272,10 +267,6 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	if (data_buf == NULL)
 		return -ENOMEM;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 
@@ -312,9 +303,9 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 int mmc_sd_switch(struct mmc_card *card, int mode, int group,
 	u8 value, u8 *resp)
 {
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	struct scatterlist sg;
 
 	BUG_ON(!card);
@@ -325,10 +316,6 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group,
 	mode = !!mode;
 	value &= 0xF;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 
@@ -361,9 +348,9 @@ int mmc_sd_switch(struct mmc_card *card, int mode, int group,
 int mmc_app_sd_status(struct mmc_card *card, void *ssr)
 {
 	int err;
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	struct scatterlist sg;
 
 	BUG_ON(!card);
@@ -376,10 +363,6 @@ int mmc_app_sd_status(struct mmc_card *card, void *ssr)
 	if (err)
 		return err;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index db0f0b44d68..4d0c15bfa51 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -16,6 +16,7 @@
 #include <linux/mmc/card.h>
 #include <linux/mmc/sdio.h>
 #include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
 
 #include "core.h"
 #include "bus.h"
@@ -31,6 +32,11 @@ static int sdio_read_fbr(struct sdio_func *func)
 	int ret;
 	unsigned char data;
 
+	if (mmc_card_nonstd_func_interface(func->card)) {
+		func->class = SDIO_CLASS_NONE;
+		return 0;
+	}
+
 	ret = mmc_io_rw_direct(func->card, 0, 0,
 		SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
 	if (ret)
@@ -181,7 +187,7 @@ static int sdio_disable_cd(struct mmc_card *card)
 	int ret;
 	u8 ctrl;
 
-	if (!card->cccr.disable_cd)
+	if (!mmc_card_disable_cd(card))
 		return 0;
 
 	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
@@ -363,8 +369,8 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 		goto err;
 	}
 
-	if (ocr & R4_MEMORY_PRESENT
-	    && mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid) == 0) {
+	if ((ocr & R4_MEMORY_PRESENT) &&
+	    mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid, NULL) == 0) {
 		card->type = MMC_TYPE_SD_COMBO;
 
 		if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
@@ -466,7 +472,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 
 		card = oldcard;
 	}
-	mmc_fixup_device(card);
+	mmc_fixup_device(card, NULL);
 
 	if (card->type == MMC_TYPE_SD_COMBO) {
 		err = mmc_sd_setup_card(host, card, oldcard != NULL);
@@ -625,7 +631,7 @@ static int mmc_sdio_suspend(struct mmc_host *host)
 		}
 	}
 
-	if (!err && host->pm_flags & MMC_PM_KEEP_POWER) {
+	if (!err && mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
 		mmc_claim_host(host);
 		sdio_disable_wide(host->card);
 		mmc_release_host(host);
@@ -645,10 +651,10 @@ static int mmc_sdio_resume(struct mmc_host *host)
 	mmc_claim_host(host);
 
 	/* No need to reinitialize powered-resumed nonremovable cards */
-	if (mmc_card_is_removable(host) || !mmc_card_is_powered_resumed(host))
+	if (mmc_card_is_removable(host) || !mmc_card_keep_power(host))
 		err = mmc_sdio_init_card(host, host->ocr, host->card,
-				 (host->pm_flags & MMC_PM_KEEP_POWER));
-	else if (mmc_card_is_powered_resumed(host)) {
+					mmc_card_keep_power(host));
+	else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
 		/* We may have switched to 1-bit mode during suspend */
 		err = sdio_enable_4bit_bus(host->card);
 		if (err > 0) {
@@ -691,7 +697,7 @@ static int mmc_sdio_power_restore(struct mmc_host *host)
 
 	mmc_claim_host(host);
 	ret = mmc_sdio_init_card(host, host->ocr, host->card,
-			(host->pm_flags & MMC_PM_KEEP_POWER));
+				mmc_card_keep_power(host));
 	if (!ret && host->sdio_irqs)
 		mmc_signal_sdio_irq(host);
 	mmc_release_host(host);
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index b3001617e67..03ead028d2c 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -31,6 +31,17 @@ static int process_sdio_pending_irqs(struct mmc_card *card)
 {
 	int i, ret, count;
 	unsigned char pending;
+	struct sdio_func *func;
+
+	/*
+	 * Optimization, if there is only 1 function interrupt registered
+	 * call irq handler directly
+	 */
+	func = card->sdio_single_irq;
+	if (func) {
+		func->irq_handler(func);
+		return 1;
+	}
 
 	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
 	if (ret) {
@@ -42,7 +53,7 @@ static int process_sdio_pending_irqs(struct mmc_card *card)
 	count = 0;
 	for (i = 1; i <= 7; i++) {
 		if (pending & (1 << i)) {
-			struct sdio_func *func = card->sdio_func[i - 1];
+			func = card->sdio_func[i - 1];
 			if (!func) {
 				printk(KERN_WARNING "%s: pending IRQ for "
 					"non-existent function\n",
@@ -186,6 +197,24 @@ static int sdio_card_irq_put(struct mmc_card *card)
 	return 0;
 }
 
+/* If there is only 1 function registered set sdio_single_irq */
+static void sdio_single_irq_set(struct mmc_card *card)
+{
+	struct sdio_func *func;
+	int i;
+
+	card->sdio_single_irq = NULL;
+	if ((card->host->caps & MMC_CAP_SDIO_IRQ) &&
+	    card->host->sdio_irqs == 1)
+		for (i = 0; i < card->sdio_funcs; i++) {
+		       func = card->sdio_func[i];
+		       if (func && func->irq_handler) {
+			       card->sdio_single_irq = func;
+			       break;
+		       }
+	       }
+}
+
 /**
  *	sdio_claim_irq - claim the IRQ for a SDIO function
  *	@func: SDIO function
@@ -227,6 +256,7 @@ int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler)
 	ret = sdio_card_irq_get(func->card);
 	if (ret)
 		func->irq_handler = NULL;
+	sdio_single_irq_set(func->card);
 
 	return ret;
 }
@@ -251,6 +281,7 @@ int sdio_release_irq(struct sdio_func *func)
 	if (func->irq_handler) {
 		func->irq_handler = NULL;
 		sdio_card_irq_put(func->card);
+		sdio_single_irq_set(func->card);
 	}
 
 	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, &reg);
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index dea36d9c22e..f087d876c57 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -21,13 +21,11 @@
 
 int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int i, err = 0;
 
 	BUG_ON(!host);
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = SD_IO_SEND_OP_COND;
 	cmd.arg = ocr;
 	cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
@@ -70,7 +68,7 @@ int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
 static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
 	unsigned addr, u8 in, u8 *out)
 {
-	struct mmc_command cmd;
+	struct mmc_command cmd = {0};
 	int err;
 
 	BUG_ON(!host);
@@ -80,8 +78,6 @@ static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
 	if (addr & ~0x1FFFF)
 		return -EINVAL;
 
-	memset(&cmd, 0, sizeof(struct mmc_command));
-
 	cmd.opcode = SD_IO_RW_DIRECT;
 	cmd.arg = write ? 0x80000000 : 0x00000000;
 	cmd.arg |= fn << 28;
@@ -125,9 +121,9 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 	unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
 {
-	struct mmc_request mrq;
-	struct mmc_command cmd;
-	struct mmc_data data;
+	struct mmc_request mrq = {0};
+	struct mmc_command cmd = {0};
+	struct mmc_data data = {0};
 	struct scatterlist sg;
 
 	BUG_ON(!card);
@@ -140,10 +136,6 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 	if (addr & ~0x1FFFF)
 		return -EINVAL;
 
-	memset(&mrq, 0, sizeof(struct mmc_request));
-	memset(&cmd, 0, sizeof(struct mmc_command));
-	memset(&data, 0, sizeof(struct mmc_data));
-
 	mrq.cmd = &cmd;
 	mrq.data = &data;
 
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 94df40531c3..56dbf3f6ad0 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -154,7 +154,7 @@ config MMC_SDHCI_DOVE
 	  If unsure, say N.
 
 config MMC_SDHCI_TEGRA
-	tristate "SDHCI platform support for the Tegra SD/MMC Controller"
+	bool "SDHCI platform support for the Tegra SD/MMC Controller"
 	depends on MMC_SDHCI_PLTFM && ARCH_TEGRA
 	select MMC_SDHCI_IO_ACCESSORS
 	help
@@ -535,6 +535,37 @@ config MMC_JZ4740
 	  If you have a board based on such a SoC and with a SD/MMC slot,
 	  say Y or M here.
 
+config MMC_VUB300
+	tristate "VUB300 USB to SDIO/SD/MMC Host Controller support"
+	depends on USB
+	help
+	  This selects support for Elan Digital Systems' VUB300 chip.
+
+	  The VUB300 is a USB-SDIO Host Controller Interface chip
+	  that enables the host computer to use SDIO/SD/MMC cards
+	  via a USB 2.0 or USB 1.1 host.
+
+	  The VUB300 chip will be found in both physically separate
+	  USB to SDIO/SD/MMC adapters and embedded on some motherboards.
+
+	  The VUB300 chip supports SD and MMC memory cards in addition
+	  to single and multifunction SDIO cards.
+
+	  Some SDIO cards will need a firmware file to be loaded and
+	  sent to VUB300 chip in order to achieve better data throughput.
+	  Download these "Offload Pseudocode" from Elan Digital Systems'
+	  web-site http://www.elandigitalsystems.com/support/downloads.php
+	  and put them in /lib/firmware. Note that without these additional
+	  firmware files the VUB300 chip will still function, but not at
+	  the best obtainable data rate.
+
+	  To compile this mmc host controller driver as a module,
+	  choose M here: the module will be called vub300.
+
+	  If you have a computer with an embedded VUB300 chip
+	  or if you intend connecting a USB adapter based on a
+	  VUB300 chip say Y or M here.
+
 config MMC_USHC
 	tristate "USB SD Host Controller (USHC) support"
 	depends on USB
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 4f1df0aae57..58a5cf73d6e 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
 obj-$(CONFIG_MMC_DW)		+= dw_mmc.o
 obj-$(CONFIG_MMC_SH_MMCIF)	+= sh_mmcif.o
 obj-$(CONFIG_MMC_JZ4740)	+= jz4740_mmc.o
+obj-$(CONFIG_MMC_VUB300)	+= vub300.o
 obj-$(CONFIG_MMC_USHC)		+= ushc.o
 
 obj-$(CONFIG_MMC_SDHCI_PLTFM)			+= sdhci-platform.o
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 87e1f57ec9b..66dcddb9c20 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1769,9 +1769,6 @@ static int dw_mci_suspend(struct platform_device *pdev, pm_message_t mesg)
 	int i, ret;
 	struct dw_mci *host = platform_get_drvdata(pdev);
 
-	if (host->vmmc)
-		regulator_enable(host->vmmc);
-
 	for (i = 0; i < host->num_slots; i++) {
 		struct dw_mci_slot *slot = host->slot[i];
 		if (!slot)
@@ -1798,6 +1795,9 @@ static int dw_mci_resume(struct platform_device *pdev)
 	int i, ret;
 	struct dw_mci *host = platform_get_drvdata(pdev);
 
+	if (host->vmmc)
+		regulator_enable(host->vmmc);
+
 	if (host->dma_ops->init)
 		host->dma_ops->init(host);
 
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index f8b5f37007b..936bbca19c0 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -18,11 +18,9 @@
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
 #include <linux/device.h>
-
 #include <linux/mmc/host.h>
-
-#include <asm/scatterlist.h>
-#include <asm/io.h>
+#include <linux/scatterlist.h>
+#include <linux/io.h>
 
 #include "sdhci.h"
 
@@ -46,14 +44,14 @@ struct sdhci_pci_slot;
 struct sdhci_pci_fixes {
 	unsigned int		quirks;
 
-	int			(*probe)(struct sdhci_pci_chip*);
+	int			(*probe) (struct sdhci_pci_chip *);
 
-	int			(*probe_slot)(struct sdhci_pci_slot*);
-	void			(*remove_slot)(struct sdhci_pci_slot*, int);
+	int			(*probe_slot) (struct sdhci_pci_slot *);
+	void			(*remove_slot) (struct sdhci_pci_slot *, int);
 
-	int			(*suspend)(struct sdhci_pci_chip*,
+	int			(*suspend) (struct sdhci_pci_chip *,
 					pm_message_t);
-	int			(*resume)(struct sdhci_pci_chip*);
+	int			(*resume) (struct sdhci_pci_chip *);
 };
 
 struct sdhci_pci_slot {
@@ -329,6 +327,11 @@ static int jmicron_probe(struct sdhci_pci_chip *chip)
 		return ret;
 	}
 
+	/* quirk for unsable RO-detection on JM388 chips */
+	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_SD ||
+	    chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD)
+		chip->quirks |= SDHCI_QUIRK_UNSTABLE_RO_DETECT;
+
 	return 0;
 }
 
@@ -402,7 +405,7 @@ static int jmicron_suspend(struct sdhci_pci_chip *chip, pm_message_t state)
 
 	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
 	    chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
-		for (i = 0;i < chip->num_slots;i++)
+		for (i = 0; i < chip->num_slots; i++)
 			jmicron_enable_mmc(chip->slots[i]->host, 0);
 	}
 
@@ -415,7 +418,7 @@ static int jmicron_resume(struct sdhci_pci_chip *chip)
 
 	if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC ||
 	    chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB388_ESD) {
-		for (i = 0;i < chip->num_slots;i++)
+		for (i = 0; i < chip->num_slots; i++)
 			jmicron_enable_mmc(chip->slots[i]->host, 1);
 	}
 
@@ -798,7 +801,7 @@ static struct sdhci_ops sdhci_pci_ops = {
 
 #ifdef CONFIG_PM
 
-static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
+static int sdhci_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 {
 	struct sdhci_pci_chip *chip;
 	struct sdhci_pci_slot *slot;
@@ -810,7 +813,7 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
 	if (!chip)
 		return 0;
 
-	for (i = 0;i < chip->num_slots;i++) {
+	for (i = 0; i < chip->num_slots; i++) {
 		slot = chip->slots[i];
 		if (!slot)
 			continue;
@@ -818,7 +821,7 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
 		ret = sdhci_suspend_host(slot->host, state);
 
 		if (ret) {
-			for (i--;i >= 0;i--)
+			for (i--; i >= 0; i--)
 				sdhci_resume_host(chip->slots[i]->host);
 			return ret;
 		}
@@ -833,7 +836,7 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
 	if (chip->fixes && chip->fixes->suspend) {
 		ret = chip->fixes->suspend(chip, state);
 		if (ret) {
-			for (i = chip->num_slots - 1;i >= 0;i--)
+			for (i = chip->num_slots - 1; i >= 0; i--)
 				sdhci_resume_host(chip->slots[i]->host);
 			return ret;
 		}
@@ -855,7 +858,7 @@ static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
 	return 0;
 }
 
-static int sdhci_pci_resume (struct pci_dev *pdev)
+static int sdhci_pci_resume(struct pci_dev *pdev)
 {
 	struct sdhci_pci_chip *chip;
 	struct sdhci_pci_slot *slot;
@@ -877,7 +880,7 @@ static int sdhci_pci_resume (struct pci_dev *pdev)
 			return ret;
 	}
 
-	for (i = 0;i < chip->num_slots;i++) {
+	for (i = 0; i < chip->num_slots; i++) {
 		slot = chip->slots[i];
 		if (!slot)
 			continue;
@@ -1059,7 +1062,7 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 	}
 
 	chip->pdev = pdev;
-	chip->fixes = (const struct sdhci_pci_fixes*)ent->driver_data;
+	chip->fixes = (const struct sdhci_pci_fixes *)ent->driver_data;
 	if (chip->fixes)
 		chip->quirks = chip->fixes->quirks;
 	chip->num_slots = slots;
@@ -1074,10 +1077,10 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 
 	slots = chip->num_slots;	/* Quirk may have changed this */
 
-	for (i = 0;i < slots;i++) {
+	for (i = 0; i < slots; i++) {
 		slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i);
 		if (IS_ERR(slot)) {
-			for (i--;i >= 0;i--)
+			for (i--; i >= 0; i--)
 				sdhci_pci_remove_slot(chip->slots[i]);
 			ret = PTR_ERR(slot);
 			goto free;
@@ -1105,7 +1108,7 @@ static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
 	chip = pci_get_drvdata(pdev);
 
 	if (chip) {
-		for (i = 0;i < chip->num_slots; i++)
+		for (i = 0; i < chip->num_slots; i++)
 			sdhci_pci_remove_slot(chip->slots[i]);
 
 		pci_set_drvdata(pdev, NULL);
@@ -1116,9 +1119,9 @@ static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
 }
 
 static struct pci_driver sdhci_driver = {
-	.name = 	"sdhci-pci",
+	.name =		"sdhci-pci",
 	.id_table =	pci_ids,
-	.probe = 	sdhci_pci_probe,
+	.probe =	sdhci_pci_probe,
 	.remove =	__devexit_p(sdhci_pci_remove),
 	.suspend =	sdhci_pci_suspend,
 	.resume	=	sdhci_pci_resume,
diff --git a/drivers/mmc/host/sdhci-pxa.c b/drivers/mmc/host/sdhci-pxa.c
index 5a61208cbc6..089c9a68b7b 100644
--- a/drivers/mmc/host/sdhci-pxa.c
+++ b/drivers/mmc/host/sdhci-pxa.c
@@ -69,7 +69,45 @@ static void set_clock(struct sdhci_host *host, unsigned int clock)
 	}
 }
 
+static int set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
+{
+	u16 ctrl_2;
+
+	/*
+	 * Set V18_EN -- UHS modes do not work without this.
+	 * does not change signaling voltage
+	 */
+	ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+
+	/* Select Bus Speed Mode for host */
+	ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+	switch (uhs) {
+	case MMC_TIMING_UHS_SDR12:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
+		break;
+	case MMC_TIMING_UHS_SDR25:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
+		break;
+	case MMC_TIMING_UHS_SDR50:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR50 | SDHCI_CTRL_VDD_180;
+		break;
+	case MMC_TIMING_UHS_SDR104:
+		ctrl_2 |= SDHCI_CTRL_UHS_SDR104 | SDHCI_CTRL_VDD_180;
+		break;
+	case MMC_TIMING_UHS_DDR50:
+		ctrl_2 |= SDHCI_CTRL_UHS_DDR50 | SDHCI_CTRL_VDD_180;
+		break;
+	}
+
+	sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+	pr_debug("%s:%s uhs = %d, ctrl_2 = %04X\n",
+		__func__, mmc_hostname(host->mmc), uhs, ctrl_2);
+
+	return 0;
+}
+
 static struct sdhci_ops sdhci_pxa_ops = {
+	.set_uhs_signaling = set_uhs_signaling,
 	.set_clock = set_clock,
 };
 
@@ -136,11 +174,19 @@ static int __devinit sdhci_pxa_probe(struct platform_device *pdev)
 	host->hw_name = "MMC";
 	host->ops = &sdhci_pxa_ops;
 	host->irq = irq;
-	host->quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
+	host->quirks = SDHCI_QUIRK_BROKEN_ADMA
+		| SDHCI_QUIRK_BROKEN_TIMEOUT_VAL
+		| SDHCI_QUIRK_32BIT_DMA_ADDR
+		| SDHCI_QUIRK_32BIT_DMA_SIZE
+		| SDHCI_QUIRK_32BIT_ADMA_SIZE
+		| SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC;
 
 	if (pdata->quirks)
 		host->quirks |= pdata->quirks;
 
+	/* enable 1/8V DDR capable */
+	host->mmc->caps |= MMC_CAP_1_8V_DDR;
+
 	/* If slot design supports 8 bit data, indicate this to MMC. */
 	if (pdata->flags & PXA_FLAG_SD_8_BIT_CAPABLE_SLOT)
 		host->mmc->caps |= MMC_CAP_8_BIT_DATA;
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index f7e1f964395..343c97edba3 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -184,6 +184,8 @@ static int tegra_sdhci_pltfm_init(struct sdhci_host *host,
 	clk_enable(clk);
 	pltfm_host->clk = clk;
 
+	host->mmc->pm_caps = plat->pm_flags;
+
 	if (plat->is_8bit)
 		host->mmc->caps |= MMC_CAP_8_BIT_DATA;
 
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 5d20661bc35..58d5436ff64 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -38,13 +38,16 @@
 #define SDHCI_USE_LEDS_CLASS
 #endif
 
+#define MAX_TUNING_LOOP 40
+
 static unsigned int debug_quirks = 0;
 
-static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
 static void sdhci_finish_data(struct sdhci_host *);
 
 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
 static void sdhci_finish_command(struct sdhci_host *);
+static int sdhci_execute_tuning(struct mmc_host *mmc);
+static void sdhci_tuning_timer(unsigned long data);
 
 static void sdhci_dumpregs(struct sdhci_host *host)
 {
@@ -84,6 +87,8 @@ static void sdhci_dumpregs(struct sdhci_host *host)
 	printk(KERN_DEBUG DRIVER_NAME ": Cmd:      0x%08x | Max curr: 0x%08x\n",
 		sdhci_readw(host, SDHCI_COMMAND),
 		sdhci_readl(host, SDHCI_MAX_CURRENT));
+	printk(KERN_DEBUG DRIVER_NAME ": Host ctl2: 0x%08x\n",
+		sdhci_readw(host, SDHCI_HOST_CONTROL2));
 
 	if (host->flags & SDHCI_USE_ADMA)
 		printk(KERN_DEBUG DRIVER_NAME ": ADMA Err: 0x%08x | ADMA Ptr: 0x%08x\n",
@@ -157,6 +162,9 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
 	if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
 		ier = sdhci_readl(host, SDHCI_INT_ENABLE);
 
+	if (host->ops->platform_reset_enter)
+		host->ops->platform_reset_enter(host, mask);
+
 	sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
 
 	if (mask & SDHCI_RESET_ALL)
@@ -177,6 +185,9 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
 		mdelay(1);
 	}
 
+	if (host->ops->platform_reset_exit)
+		host->ops->platform_reset_exit(host, mask);
+
 	if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
 		sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
 }
@@ -591,9 +602,10 @@ static void sdhci_adma_table_post(struct sdhci_host *host,
 		data->sg_len, direction);
 }
 
-static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
+static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
 {
 	u8 count;
+	struct mmc_data *data = cmd->data;
 	unsigned target_timeout, current_timeout;
 
 	/*
@@ -605,9 +617,16 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
 	if (host->quirks & SDHCI_QUIRK_BROKEN_TIMEOUT_VAL)
 		return 0xE;
 
+	/* Unspecified timeout, assume max */
+	if (!data && !cmd->cmd_timeout_ms)
+		return 0xE;
+
 	/* timeout in us */
-	target_timeout = data->timeout_ns / 1000 +
-		data->timeout_clks / host->clock;
+	if (!data)
+		target_timeout = cmd->cmd_timeout_ms * 1000;
+	else
+		target_timeout = data->timeout_ns / 1000 +
+			data->timeout_clks / host->clock;
 
 	if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
 		host->timeout_clk = host->clock / 1000;
@@ -622,6 +641,7 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
 	 *     =>
 	 *     (1) / (2) > 2^6
 	 */
+	BUG_ON(!host->timeout_clk);
 	count = 0;
 	current_timeout = (1 << 13) * 1000 / host->timeout_clk;
 	while (current_timeout < target_timeout) {
@@ -632,8 +652,8 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
 	}
 
 	if (count >= 0xF) {
-		printk(KERN_WARNING "%s: Too large timeout requested!\n",
-			mmc_hostname(host->mmc));
+		printk(KERN_WARNING "%s: Too large timeout requested for CMD%d!\n",
+		       mmc_hostname(host->mmc), cmd->opcode);
 		count = 0xE;
 	}
 
@@ -651,15 +671,21 @@ static void sdhci_set_transfer_irqs(struct sdhci_host *host)
 		sdhci_clear_set_irqs(host, dma_irqs, pio_irqs);
 }
 
-static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
+static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd)
 {
 	u8 count;
 	u8 ctrl;
+	struct mmc_data *data = cmd->data;
 	int ret;
 
 	WARN_ON(host->data);
 
-	if (data == NULL)
+	if (data || (cmd->flags & MMC_RSP_BUSY)) {
+		count = sdhci_calc_timeout(host, cmd);
+		sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
+	}
+
+	if (!data)
 		return;
 
 	/* Sanity checks */
@@ -669,9 +695,7 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
 
 	host->data = data;
 	host->data_early = 0;
-
-	count = sdhci_calc_timeout(host, data);
-	sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
+	host->data->bytes_xfered = 0;
 
 	if (host->flags & (SDHCI_USE_SDMA | SDHCI_USE_ADMA))
 		host->flags |= SDHCI_REQ_USE_DMA;
@@ -807,15 +831,17 @@ static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
 
 	sdhci_set_transfer_irqs(host);
 
-	/* We do not handle DMA boundaries, so set it to max (512 KiB) */
-	sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, data->blksz), SDHCI_BLOCK_SIZE);
+	/* Set the DMA boundary value and block size */
+	sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
+		data->blksz), SDHCI_BLOCK_SIZE);
 	sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
 }
 
 static void sdhci_set_transfer_mode(struct sdhci_host *host,
-	struct mmc_data *data)
+	struct mmc_command *cmd)
 {
 	u16 mode;
+	struct mmc_data *data = cmd->data;
 
 	if (data == NULL)
 		return;
@@ -823,12 +849,20 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
 	WARN_ON(!host->data);
 
 	mode = SDHCI_TRNS_BLK_CNT_EN;
-	if (data->blocks > 1) {
-		if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
-			mode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_ACMD12;
-		else
-			mode |= SDHCI_TRNS_MULTI;
+	if (mmc_op_multi(cmd->opcode) || data->blocks > 1) {
+		mode |= SDHCI_TRNS_MULTI;
+		/*
+		 * If we are sending CMD23, CMD12 never gets sent
+		 * on successful completion (so no Auto-CMD12).
+		 */
+		if (!host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD12))
+			mode |= SDHCI_TRNS_AUTO_CMD12;
+		else if (host->mrq->sbc && (host->flags & SDHCI_AUTO_CMD23)) {
+			mode |= SDHCI_TRNS_AUTO_CMD23;
+			sdhci_writel(host, host->mrq->sbc->arg, SDHCI_ARGUMENT2);
+		}
 	}
+
 	if (data->flags & MMC_DATA_READ)
 		mode |= SDHCI_TRNS_READ;
 	if (host->flags & SDHCI_REQ_USE_DMA)
@@ -868,7 +902,15 @@ static void sdhci_finish_data(struct sdhci_host *host)
 	else
 		data->bytes_xfered = data->blksz * data->blocks;
 
-	if (data->stop) {
+	/*
+	 * Need to send CMD12 if -
+	 * a) open-ended multiblock transfer (no CMD23)
+	 * b) error in multiblock transfer
+	 */
+	if (data->stop &&
+	    (data->error ||
+	     !host->mrq->sbc)) {
+
 		/*
 		 * The controller needs a reset of internal state machines
 		 * upon error conditions.
@@ -920,11 +962,11 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 
 	host->cmd = cmd;
 
-	sdhci_prepare_data(host, cmd->data);
+	sdhci_prepare_data(host, cmd);
 
 	sdhci_writel(host, cmd->arg, SDHCI_ARGUMENT);
 
-	sdhci_set_transfer_mode(host, cmd->data);
+	sdhci_set_transfer_mode(host, cmd);
 
 	if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 		printk(KERN_ERR "%s: Unsupported response type!\n",
@@ -947,7 +989,9 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 		flags |= SDHCI_CMD_CRC;
 	if (cmd->flags & MMC_RSP_OPCODE)
 		flags |= SDHCI_CMD_INDEX;
-	if (cmd->data)
+
+	/* CMD19 is special in that the Data Present Select should be set */
+	if (cmd->data || (cmd->opcode == MMC_SEND_TUNING_BLOCK))
 		flags |= SDHCI_CMD_DATA;
 
 	sdhci_writew(host, SDHCI_MAKE_CMD(cmd->opcode, flags), SDHCI_COMMAND);
@@ -977,19 +1021,27 @@ static void sdhci_finish_command(struct sdhci_host *host)
 
 	host->cmd->error = 0;
 
-	if (host->data && host->data_early)
-		sdhci_finish_data(host);
+	/* Finished CMD23, now send actual command. */
+	if (host->cmd == host->mrq->sbc) {
+		host->cmd = NULL;
+		sdhci_send_command(host, host->mrq->cmd);
+	} else {
 
-	if (!host->cmd->data)
-		tasklet_schedule(&host->finish_tasklet);
+		/* Processed actual command. */
+		if (host->data && host->data_early)
+			sdhci_finish_data(host);
 
-	host->cmd = NULL;
+		if (!host->cmd->data)
+			tasklet_schedule(&host->finish_tasklet);
+
+		host->cmd = NULL;
+	}
 }
 
 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 {
-	int div;
-	u16 clk;
+	int div = 0; /* Initialized for compiler warning */
+	u16 clk = 0;
 	unsigned long timeout;
 
 	if (clock == host->clock)
@@ -1007,14 +1059,45 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 		goto out;
 
 	if (host->version >= SDHCI_SPEC_300) {
-		/* Version 3.00 divisors must be a multiple of 2. */
-		if (host->max_clk <= clock)
-			div = 1;
-		else {
-			for (div = 2; div < SDHCI_MAX_DIV_SPEC_300; div += 2) {
-				if ((host->max_clk / div) <= clock)
-					break;
+		/*
+		 * Check if the Host Controller supports Programmable Clock
+		 * Mode.
+		 */
+		if (host->clk_mul) {
+			u16 ctrl;
+
+			/*
+			 * We need to figure out whether the Host Driver needs
+			 * to select Programmable Clock Mode, or the value can
+			 * be set automatically by the Host Controller based on
+			 * the Preset Value registers.
+			 */
+			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+			if (!(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) {
+				for (div = 1; div <= 1024; div++) {
+					if (((host->max_clk * host->clk_mul) /
+					      div) <= clock)
+						break;
+				}
+				/*
+				 * Set Programmable Clock Mode in the Clock
+				 * Control register.
+				 */
+				clk = SDHCI_PROG_CLOCK_MODE;
+				div--;
 			}
+		} else {
+			/* Version 3.00 divisors must be a multiple of 2. */
+			if (host->max_clk <= clock)
+				div = 1;
+			else {
+				for (div = 2; div < SDHCI_MAX_DIV_SPEC_300;
+				     div += 2) {
+					if ((host->max_clk / div) <= clock)
+						break;
+				}
+			}
+			div >>= 1;
 		}
 	} else {
 		/* Version 2.00 divisors must be a power of 2. */
@@ -1022,10 +1105,10 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 			if ((host->max_clk / div) <= clock)
 				break;
 		}
+		div >>= 1;
 	}
-	div >>= 1;
 
-	clk = (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
+	clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
 	clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
 		<< SDHCI_DIVIDER_HI_SHIFT;
 	clk |= SDHCI_CLOCK_INT_EN;
@@ -1131,7 +1214,12 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 #ifndef SDHCI_USE_LEDS_CLASS
 	sdhci_activate_led(host);
 #endif
-	if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) {
+
+	/*
+	 * Ensure we don't send the STOP for non-SET_BLOCK_COUNTED
+	 * requests if Auto-CMD12 is enabled.
+	 */
+	if (!mrq->sbc && (host->flags & SDHCI_AUTO_CMD12)) {
 		if (mrq->stop) {
 			mrq->data->stop = NULL;
 			mrq->stop = NULL;
@@ -1150,8 +1238,30 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	if (!present || host->flags & SDHCI_DEVICE_DEAD) {
 		host->mrq->cmd->error = -ENOMEDIUM;
 		tasklet_schedule(&host->finish_tasklet);
-	} else
-		sdhci_send_command(host, mrq->cmd);
+	} else {
+		u32 present_state;
+
+		present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
+		/*
+		 * Check if the re-tuning timer has already expired and there
+		 * is no on-going data transfer. If so, we need to execute
+		 * tuning procedure before sending command.
+		 */
+		if ((host->flags & SDHCI_NEEDS_RETUNING) &&
+		    !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			sdhci_execute_tuning(mmc);
+			spin_lock_irqsave(&host->lock, flags);
+
+			/* Restore original mmc_request structure */
+			host->mrq = mrq;
+		}
+
+		if (mrq->sbc && !(host->flags & SDHCI_AUTO_CMD23))
+			sdhci_send_command(host, mrq->sbc);
+		else
+			sdhci_send_command(host, mrq->cmd);
+	}
 
 	mmiowb();
 	spin_unlock_irqrestore(&host->lock, flags);
@@ -1222,7 +1332,84 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	else
 		ctrl &= ~SDHCI_CTRL_HISPD;
 
-	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+	if (host->version >= SDHCI_SPEC_300) {
+		u16 clk, ctrl_2;
+		unsigned int clock;
+
+		/* In case of UHS-I modes, set High Speed Enable */
+		if ((ios->timing == MMC_TIMING_UHS_SDR50) ||
+		    (ios->timing == MMC_TIMING_UHS_SDR104) ||
+		    (ios->timing == MMC_TIMING_UHS_DDR50) ||
+		    (ios->timing == MMC_TIMING_UHS_SDR25) ||
+		    (ios->timing == MMC_TIMING_UHS_SDR12))
+			ctrl |= SDHCI_CTRL_HISPD;
+
+		ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+		if (!(ctrl_2 & SDHCI_CTRL_PRESET_VAL_ENABLE)) {
+			sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+			/*
+			 * We only need to set Driver Strength if the
+			 * preset value enable is not set.
+			 */
+			ctrl_2 &= ~SDHCI_CTRL_DRV_TYPE_MASK;
+			if (ios->drv_type == MMC_SET_DRIVER_TYPE_A)
+				ctrl_2 |= SDHCI_CTRL_DRV_TYPE_A;
+			else if (ios->drv_type == MMC_SET_DRIVER_TYPE_C)
+				ctrl_2 |= SDHCI_CTRL_DRV_TYPE_C;
+
+			sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+		} else {
+			/*
+			 * According to SDHC Spec v3.00, if the Preset Value
+			 * Enable in the Host Control 2 register is set, we
+			 * need to reset SD Clock Enable before changing High
+			 * Speed Enable to avoid generating clock gliches.
+			 */
+
+			/* Reset SD Clock Enable */
+			clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+			clk &= ~SDHCI_CLOCK_CARD_EN;
+			sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+			sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+
+			/* Re-enable SD Clock */
+			clock = host->clock;
+			host->clock = 0;
+			sdhci_set_clock(host, clock);
+		}
+
+
+		/* Reset SD Clock Enable */
+		clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+		clk &= ~SDHCI_CLOCK_CARD_EN;
+		sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+		if (host->ops->set_uhs_signaling)
+			host->ops->set_uhs_signaling(host, ios->timing);
+		else {
+			ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+			/* Select Bus Speed Mode for host */
+			ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+			if (ios->timing == MMC_TIMING_UHS_SDR12)
+				ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
+			else if (ios->timing == MMC_TIMING_UHS_SDR25)
+				ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
+			else if (ios->timing == MMC_TIMING_UHS_SDR50)
+				ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
+			else if (ios->timing == MMC_TIMING_UHS_SDR104)
+				ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
+			else if (ios->timing == MMC_TIMING_UHS_DDR50)
+				ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
+			sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+		}
+
+		/* Re-enable SD Clock */
+		clock = host->clock;
+		host->clock = 0;
+		sdhci_set_clock(host, clock);
+	} else
+		sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
 
 	/*
 	 * Some (ENE) controllers go apeshit on some ios operation,
@@ -1237,14 +1424,11 @@ out:
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
-static int sdhci_get_ro(struct mmc_host *mmc)
+static int check_ro(struct sdhci_host *host)
 {
-	struct sdhci_host *host;
 	unsigned long flags;
 	int is_readonly;
 
-	host = mmc_priv(mmc);
-
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (host->flags & SDHCI_DEVICE_DEAD)
@@ -1262,6 +1446,29 @@ static int sdhci_get_ro(struct mmc_host *mmc)
 		!is_readonly : is_readonly;
 }
 
+#define SAMPLE_COUNT	5
+
+static int sdhci_get_ro(struct mmc_host *mmc)
+{
+	struct sdhci_host *host;
+	int i, ro_count;
+
+	host = mmc_priv(mmc);
+
+	if (!(host->quirks & SDHCI_QUIRK_UNSTABLE_RO_DETECT))
+		return check_ro(host);
+
+	ro_count = 0;
+	for (i = 0; i < SAMPLE_COUNT; i++) {
+		if (check_ro(host)) {
+			if (++ro_count > SAMPLE_COUNT / 2)
+				return 1;
+		}
+		msleep(30);
+	}
+	return 0;
+}
+
 static void sdhci_enable_sdio_irq(struct mmc_host *mmc, int enable)
 {
 	struct sdhci_host *host;
@@ -1284,11 +1491,322 @@ out:
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
+static int sdhci_start_signal_voltage_switch(struct mmc_host *mmc,
+	struct mmc_ios *ios)
+{
+	struct sdhci_host *host;
+	u8 pwr;
+	u16 clk, ctrl;
+	u32 present_state;
+
+	host = mmc_priv(mmc);
+
+	/*
+	 * Signal Voltage Switching is only applicable for Host Controllers
+	 * v3.00 and above.
+	 */
+	if (host->version < SDHCI_SPEC_300)
+		return 0;
+
+	/*
+	 * We first check whether the request is to set signalling voltage
+	 * to 3.3V. If so, we change the voltage to 3.3V and return quickly.
+	 */
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+	if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
+		/* Set 1.8V Signal Enable in the Host Control2 register to 0 */
+		ctrl &= ~SDHCI_CTRL_VDD_180;
+		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+		/* Wait for 5ms */
+		usleep_range(5000, 5500);
+
+		/* 3.3V regulator output should be stable within 5 ms */
+		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+		if (!(ctrl & SDHCI_CTRL_VDD_180))
+			return 0;
+		else {
+			printk(KERN_INFO DRIVER_NAME ": Switching to 3.3V "
+				"signalling voltage failed\n");
+			return -EIO;
+		}
+	} else if (!(ctrl & SDHCI_CTRL_VDD_180) &&
+		  (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180)) {
+		/* Stop SDCLK */
+		clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+		clk &= ~SDHCI_CLOCK_CARD_EN;
+		sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+
+		/* Check whether DAT[3:0] is 0000 */
+		present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
+		if (!((present_state & SDHCI_DATA_LVL_MASK) >>
+		       SDHCI_DATA_LVL_SHIFT)) {
+			/*
+			 * Enable 1.8V Signal Enable in the Host Control2
+			 * register
+			 */
+			ctrl |= SDHCI_CTRL_VDD_180;
+			sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+			/* Wait for 5ms */
+			usleep_range(5000, 5500);
+
+			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+			if (ctrl & SDHCI_CTRL_VDD_180) {
+				/* Provide SDCLK again and wait for 1ms*/
+				clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+				clk |= SDHCI_CLOCK_CARD_EN;
+				sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
+				usleep_range(1000, 1500);
+
+				/*
+				 * If DAT[3:0] level is 1111b, then the card
+				 * was successfully switched to 1.8V signaling.
+				 */
+				present_state = sdhci_readl(host,
+							SDHCI_PRESENT_STATE);
+				if ((present_state & SDHCI_DATA_LVL_MASK) ==
+				     SDHCI_DATA_LVL_MASK)
+					return 0;
+			}
+		}
+
+		/*
+		 * If we are here, that means the switch to 1.8V signaling
+		 * failed. We power cycle the card, and retry initialization
+		 * sequence by setting S18R to 0.
+		 */
+		pwr = sdhci_readb(host, SDHCI_POWER_CONTROL);
+		pwr &= ~SDHCI_POWER_ON;
+		sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+
+		/* Wait for 1ms as per the spec */
+		usleep_range(1000, 1500);
+		pwr |= SDHCI_POWER_ON;
+		sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
+
+		printk(KERN_INFO DRIVER_NAME ": Switching to 1.8V signalling "
+			"voltage failed, retrying with S18R set to 0\n");
+		return -EAGAIN;
+	} else
+		/* No signal voltage switch required */
+		return 0;
+}
+
+static int sdhci_execute_tuning(struct mmc_host *mmc)
+{
+	struct sdhci_host *host;
+	u16 ctrl;
+	u32 ier;
+	int tuning_loop_counter = MAX_TUNING_LOOP;
+	unsigned long timeout;
+	int err = 0;
+
+	host = mmc_priv(mmc);
+
+	disable_irq(host->irq);
+	spin_lock(&host->lock);
+
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+
+	/*
+	 * Host Controller needs tuning only in case of SDR104 mode
+	 * and for SDR50 mode when Use Tuning for SDR50 is set in
+	 * Capabilities register.
+	 */
+	if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) ||
+	    (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) &&
+	    (host->flags & SDHCI_SDR50_NEEDS_TUNING)))
+		ctrl |= SDHCI_CTRL_EXEC_TUNING;
+	else {
+		spin_unlock(&host->lock);
+		enable_irq(host->irq);
+		return 0;
+	}
+
+	sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+	/*
+	 * As per the Host Controller spec v3.00, tuning command
+	 * generates Buffer Read Ready interrupt, so enable that.
+	 *
+	 * Note: The spec clearly says that when tuning sequence
+	 * is being performed, the controller does not generate
+	 * interrupts other than Buffer Read Ready interrupt. But
+	 * to make sure we don't hit a controller bug, we _only_
+	 * enable Buffer Read Ready interrupt here.
+	 */
+	ier = sdhci_readl(host, SDHCI_INT_ENABLE);
+	sdhci_clear_set_irqs(host, ier, SDHCI_INT_DATA_AVAIL);
+
+	/*
+	 * Issue CMD19 repeatedly till Execute Tuning is set to 0 or the number
+	 * of loops reaches 40 times or a timeout of 150ms occurs.
+	 */
+	timeout = 150;
+	do {
+		struct mmc_command cmd = {0};
+		struct mmc_request mrq = {0};
+
+		if (!tuning_loop_counter && !timeout)
+			break;
+
+		cmd.opcode = MMC_SEND_TUNING_BLOCK;
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+		cmd.retries = 0;
+		cmd.data = NULL;
+		cmd.error = 0;
+
+		mrq.cmd = &cmd;
+		host->mrq = &mrq;
+
+		/*
+		 * In response to CMD19, the card sends 64 bytes of tuning
+		 * block to the Host Controller. So we set the block size
+		 * to 64 here.
+		 */
+		sdhci_writew(host, SDHCI_MAKE_BLKSZ(7, 64), SDHCI_BLOCK_SIZE);
+
+		/*
+		 * The tuning block is sent by the card to the host controller.
+		 * So we set the TRNS_READ bit in the Transfer Mode register.
+		 * This also takes care of setting DMA Enable and Multi Block
+		 * Select in the same register to 0.
+		 */
+		sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
+
+		sdhci_send_command(host, &cmd);
+
+		host->cmd = NULL;
+		host->mrq = NULL;
+
+		spin_unlock(&host->lock);
+		enable_irq(host->irq);
+
+		/* Wait for Buffer Read Ready interrupt */
+		wait_event_interruptible_timeout(host->buf_ready_int,
+					(host->tuning_done == 1),
+					msecs_to_jiffies(50));
+		disable_irq(host->irq);
+		spin_lock(&host->lock);
+
+		if (!host->tuning_done) {
+			printk(KERN_INFO DRIVER_NAME ": Timeout waiting for "
+				"Buffer Read Ready interrupt during tuning "
+				"procedure, falling back to fixed sampling "
+				"clock\n");
+			ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+			ctrl &= ~SDHCI_CTRL_TUNED_CLK;
+			ctrl &= ~SDHCI_CTRL_EXEC_TUNING;
+			sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+
+			err = -EIO;
+			goto out;
+		}
+
+		host->tuning_done = 0;
+
+		ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+		tuning_loop_counter--;
+		timeout--;
+		mdelay(1);
+	} while (ctrl & SDHCI_CTRL_EXEC_TUNING);
+
+	/*
+	 * The Host Driver has exhausted the maximum number of loops allowed,
+	 * so use fixed sampling frequency.
+	 */
+	if (!tuning_loop_counter || !timeout) {
+		ctrl &= ~SDHCI_CTRL_TUNED_CLK;
+		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+	} else {
+		if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
+			printk(KERN_INFO DRIVER_NAME ": Tuning procedure"
+				" failed, falling back to fixed sampling"
+				" clock\n");
+			err = -EIO;
+		}
+	}
+
+out:
+	/*
+	 * If this is the very first time we are here, we start the retuning
+	 * timer. Since only during the first time, SDHCI_NEEDS_RETUNING
+	 * flag won't be set, we check this condition before actually starting
+	 * the timer.
+	 */
+	if (!(host->flags & SDHCI_NEEDS_RETUNING) && host->tuning_count &&
+	    (host->tuning_mode == SDHCI_TUNING_MODE_1)) {
+		mod_timer(&host->tuning_timer, jiffies +
+			host->tuning_count * HZ);
+		/* Tuning mode 1 limits the maximum data length to 4MB */
+		mmc->max_blk_count = (4 * 1024 * 1024) / mmc->max_blk_size;
+	} else {
+		host->flags &= ~SDHCI_NEEDS_RETUNING;
+		/* Reload the new initial value for timer */
+		if (host->tuning_mode == SDHCI_TUNING_MODE_1)
+			mod_timer(&host->tuning_timer, jiffies +
+				host->tuning_count * HZ);
+	}
+
+	/*
+	 * In case tuning fails, host controllers which support re-tuning can
+	 * try tuning again at a later time, when the re-tuning timer expires.
+	 * So for these controllers, we return 0. Since there might be other
+	 * controllers who do not have this capability, we return error for
+	 * them.
+	 */
+	if (err && host->tuning_count &&
+	    host->tuning_mode == SDHCI_TUNING_MODE_1)
+		err = 0;
+
+	sdhci_clear_set_irqs(host, SDHCI_INT_DATA_AVAIL, ier);
+	spin_unlock(&host->lock);
+	enable_irq(host->irq);
+
+	return err;
+}
+
+static void sdhci_enable_preset_value(struct mmc_host *mmc, bool enable)
+{
+	struct sdhci_host *host;
+	u16 ctrl;
+	unsigned long flags;
+
+	host = mmc_priv(mmc);
+
+	/* Host Controller v3.00 defines preset value registers */
+	if (host->version < SDHCI_SPEC_300)
+		return;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+
+	/*
+	 * We only enable or disable Preset Value if they are not already
+	 * enabled or disabled respectively. Otherwise, we bail out.
+	 */
+	if (enable && !(ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) {
+		ctrl |= SDHCI_CTRL_PRESET_VAL_ENABLE;
+		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+	} else if (!enable && (ctrl & SDHCI_CTRL_PRESET_VAL_ENABLE)) {
+		ctrl &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
+		sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
+	}
+
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
 static const struct mmc_host_ops sdhci_ops = {
 	.request	= sdhci_request,
 	.set_ios	= sdhci_set_ios,
 	.get_ro		= sdhci_get_ro,
 	.enable_sdio_irq = sdhci_enable_sdio_irq,
+	.start_signal_voltage_switch	= sdhci_start_signal_voltage_switch,
+	.execute_tuning			= sdhci_execute_tuning,
+	.enable_preset_value		= sdhci_enable_preset_value,
 };
 
 /*****************************************************************************\
@@ -1345,6 +1863,9 @@ static void sdhci_tasklet_finish(unsigned long param)
 
 	del_timer(&host->timer);
 
+	if (host->version >= SDHCI_SPEC_300)
+		del_timer(&host->tuning_timer);
+
 	mrq = host->mrq;
 
 	/*
@@ -1418,6 +1939,20 @@ static void sdhci_timeout_timer(unsigned long data)
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
+static void sdhci_tuning_timer(unsigned long data)
+{
+	struct sdhci_host *host;
+	unsigned long flags;
+
+	host = (struct sdhci_host *)data;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	host->flags |= SDHCI_NEEDS_RETUNING;
+
+	spin_unlock_irqrestore(&host->lock, flags);
+}
+
 /*****************************************************************************\
  *                                                                           *
  * Interrupt handling                                                        *
@@ -1506,6 +2041,16 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 {
 	BUG_ON(intmask == 0);
 
+	/* CMD19 generates _only_ Buffer Read Ready interrupt */
+	if (intmask & SDHCI_INT_DATA_AVAIL) {
+		if (SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND)) ==
+		    MMC_SEND_TUNING_BLOCK) {
+			host->tuning_done = 1;
+			wake_up(&host->buf_ready_int);
+			return;
+		}
+	}
+
 	if (!host->data) {
 		/*
 		 * The "data complete" interrupt is also used to
@@ -1551,10 +2096,28 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 		 * We currently don't do anything fancy with DMA
 		 * boundaries, but as we can't disable the feature
 		 * we need to at least restart the transfer.
+		 *
+		 * According to the spec sdhci_readl(host, SDHCI_DMA_ADDRESS)
+		 * should return a valid address to continue from, but as
+		 * some controllers are faulty, don't trust them.
 		 */
-		if (intmask & SDHCI_INT_DMA_END)
-			sdhci_writel(host, sdhci_readl(host, SDHCI_DMA_ADDRESS),
-				SDHCI_DMA_ADDRESS);
+		if (intmask & SDHCI_INT_DMA_END) {
+			u32 dmastart, dmanow;
+			dmastart = sg_dma_address(host->data->sg);
+			dmanow = dmastart + host->data->bytes_xfered;
+			/*
+			 * Force update to the next DMA block boundary.
+			 */
+			dmanow = (dmanow &
+				~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
+				SDHCI_DEFAULT_BOUNDARY_SIZE;
+			host->data->bytes_xfered = dmanow - dmastart;
+			DBG("%s: DMA base 0x%08x, transferred 0x%06x bytes,"
+				" next 0x%08x\n",
+				mmc_hostname(host->mmc), dmastart,
+				host->data->bytes_xfered, dmanow);
+			sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
+		}
 
 		if (intmask & SDHCI_INT_DATA_END) {
 			if (host->cmd) {
@@ -1664,6 +2227,14 @@ int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state)
 
 	sdhci_disable_card_detection(host);
 
+	/* Disable tuning since we are suspending */
+	if (host->version >= SDHCI_SPEC_300 && host->tuning_count &&
+	    host->tuning_mode == SDHCI_TUNING_MODE_1) {
+		host->flags &= ~SDHCI_NEEDS_RETUNING;
+		mod_timer(&host->tuning_timer, jiffies +
+			host->tuning_count * HZ);
+	}
+
 	ret = mmc_suspend_host(host->mmc);
 	if (ret)
 		return ret;
@@ -1705,6 +2276,11 @@ int sdhci_resume_host(struct sdhci_host *host)
 	ret = mmc_resume_host(host->mmc);
 	sdhci_enable_card_detection(host);
 
+	/* Set the re-tuning expiration flag */
+	if ((host->version >= SDHCI_SPEC_300) && host->tuning_count &&
+	    (host->tuning_mode == SDHCI_TUNING_MODE_1))
+		host->flags |= SDHCI_NEEDS_RETUNING;
+
 	return ret;
 }
 
@@ -1751,7 +2327,9 @@ EXPORT_SYMBOL_GPL(sdhci_alloc_host);
 int sdhci_add_host(struct sdhci_host *host)
 {
 	struct mmc_host *mmc;
-	unsigned int caps, ocr_avail;
+	u32 caps[2];
+	u32 max_current_caps;
+	unsigned int ocr_avail;
 	int ret;
 
 	WARN_ON(host == NULL);
@@ -1774,12 +2352,15 @@ int sdhci_add_host(struct sdhci_host *host)
 			host->version);
 	}
 
-	caps = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps :
+	caps[0] = (host->quirks & SDHCI_QUIRK_MISSING_CAPS) ? host->caps :
 		sdhci_readl(host, SDHCI_CAPABILITIES);
 
+	caps[1] = (host->version >= SDHCI_SPEC_300) ?
+		sdhci_readl(host, SDHCI_CAPABILITIES_1) : 0;
+
 	if (host->quirks & SDHCI_QUIRK_FORCE_DMA)
 		host->flags |= SDHCI_USE_SDMA;
-	else if (!(caps & SDHCI_CAN_DO_SDMA))
+	else if (!(caps[0] & SDHCI_CAN_DO_SDMA))
 		DBG("Controller doesn't have SDMA capability\n");
 	else
 		host->flags |= SDHCI_USE_SDMA;
@@ -1790,7 +2371,8 @@ int sdhci_add_host(struct sdhci_host *host)
 		host->flags &= ~SDHCI_USE_SDMA;
 	}
 
-	if ((host->version >= SDHCI_SPEC_200) && (caps & SDHCI_CAN_DO_ADMA2))
+	if ((host->version >= SDHCI_SPEC_200) &&
+		(caps[0] & SDHCI_CAN_DO_ADMA2))
 		host->flags |= SDHCI_USE_ADMA;
 
 	if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
@@ -1840,10 +2422,10 @@ int sdhci_add_host(struct sdhci_host *host)
 	}
 
 	if (host->version >= SDHCI_SPEC_300)
-		host->max_clk = (caps & SDHCI_CLOCK_V3_BASE_MASK)
+		host->max_clk = (caps[0] & SDHCI_CLOCK_V3_BASE_MASK)
 			>> SDHCI_CLOCK_BASE_SHIFT;
 	else
-		host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK)
+		host->max_clk = (caps[0] & SDHCI_CLOCK_BASE_MASK)
 			>> SDHCI_CLOCK_BASE_SHIFT;
 
 	host->max_clk *= 1000000;
@@ -1859,7 +2441,7 @@ int sdhci_add_host(struct sdhci_host *host)
 	}
 
 	host->timeout_clk =
-		(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
+		(caps[0] & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
 	if (host->timeout_clk == 0) {
 		if (host->ops->get_timeout_clock) {
 			host->timeout_clk = host->ops->get_timeout_clock(host);
@@ -1871,22 +2453,55 @@ int sdhci_add_host(struct sdhci_host *host)
 			return -ENODEV;
 		}
 	}
-	if (caps & SDHCI_TIMEOUT_CLK_UNIT)
+	if (caps[0] & SDHCI_TIMEOUT_CLK_UNIT)
 		host->timeout_clk *= 1000;
 
 	/*
+	 * In case of Host Controller v3.00, find out whether clock
+	 * multiplier is supported.
+	 */
+	host->clk_mul = (caps[1] & SDHCI_CLOCK_MUL_MASK) >>
+			SDHCI_CLOCK_MUL_SHIFT;
+
+	/*
+	 * In case the value in Clock Multiplier is 0, then programmable
+	 * clock mode is not supported, otherwise the actual clock
+	 * multiplier is one more than the value of Clock Multiplier
+	 * in the Capabilities Register.
+	 */
+	if (host->clk_mul)
+		host->clk_mul += 1;
+
+	/*
 	 * Set host parameters.
 	 */
 	mmc->ops = &sdhci_ops;
+	mmc->f_max = host->max_clk;
 	if (host->ops->get_min_clock)
 		mmc->f_min = host->ops->get_min_clock(host);
-	else if (host->version >= SDHCI_SPEC_300)
-		mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300;
-	else
+	else if (host->version >= SDHCI_SPEC_300) {
+		if (host->clk_mul) {
+			mmc->f_min = (host->max_clk * host->clk_mul) / 1024;
+			mmc->f_max = host->max_clk * host->clk_mul;
+		} else
+			mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_300;
+	} else
 		mmc->f_min = host->max_clk / SDHCI_MAX_DIV_SPEC_200;
 
-	mmc->f_max = host->max_clk;
-	mmc->caps |= MMC_CAP_SDIO_IRQ;
+	mmc->caps |= MMC_CAP_SDIO_IRQ | MMC_CAP_ERASE | MMC_CAP_CMD23;
+
+	if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
+		host->flags |= SDHCI_AUTO_CMD12;
+
+	/* Auto-CMD23 stuff only works in ADMA or PIO. */
+	if ((host->version >= SDHCI_SPEC_300) &&
+	    ((host->flags & SDHCI_USE_ADMA) ||
+	     !(host->flags & SDHCI_USE_SDMA))) {
+		host->flags |= SDHCI_AUTO_CMD23;
+		DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc));
+	} else {
+		DBG("%s: Auto-CMD23 unavailable\n", mmc_hostname(mmc));
+	}
 
 	/*
 	 * A controller may support 8-bit width, but the board itself
@@ -1898,21 +2513,113 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
 		mmc->caps |= MMC_CAP_4_BIT_DATA;
 
-	if (caps & SDHCI_CAN_DO_HISPD)
+	if (caps[0] & SDHCI_CAN_DO_HISPD)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
 
 	if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
 	    mmc_card_is_removable(mmc))
 		mmc->caps |= MMC_CAP_NEEDS_POLL;
 
+	/* UHS-I mode(s) supported by the host controller. */
+	if (host->version >= SDHCI_SPEC_300)
+		mmc->caps |= MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25;
+
+	/* SDR104 supports also implies SDR50 support */
+	if (caps[1] & SDHCI_SUPPORT_SDR104)
+		mmc->caps |= MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_SDR50;
+	else if (caps[1] & SDHCI_SUPPORT_SDR50)
+		mmc->caps |= MMC_CAP_UHS_SDR50;
+
+	if (caps[1] & SDHCI_SUPPORT_DDR50)
+		mmc->caps |= MMC_CAP_UHS_DDR50;
+
+	/* Does the host needs tuning for SDR50? */
+	if (caps[1] & SDHCI_USE_SDR50_TUNING)
+		host->flags |= SDHCI_SDR50_NEEDS_TUNING;
+
+	/* Driver Type(s) (A, C, D) supported by the host */
+	if (caps[1] & SDHCI_DRIVER_TYPE_A)
+		mmc->caps |= MMC_CAP_DRIVER_TYPE_A;
+	if (caps[1] & SDHCI_DRIVER_TYPE_C)
+		mmc->caps |= MMC_CAP_DRIVER_TYPE_C;
+	if (caps[1] & SDHCI_DRIVER_TYPE_D)
+		mmc->caps |= MMC_CAP_DRIVER_TYPE_D;
+
+	/* Initial value for re-tuning timer count */
+	host->tuning_count = (caps[1] & SDHCI_RETUNING_TIMER_COUNT_MASK) >>
+			      SDHCI_RETUNING_TIMER_COUNT_SHIFT;
+
+	/*
+	 * In case Re-tuning Timer is not disabled, the actual value of
+	 * re-tuning timer will be 2 ^ (n - 1).
+	 */
+	if (host->tuning_count)
+		host->tuning_count = 1 << (host->tuning_count - 1);
+
+	/* Re-tuning mode supported by the Host Controller */
+	host->tuning_mode = (caps[1] & SDHCI_RETUNING_MODE_MASK) >>
+			     SDHCI_RETUNING_MODE_SHIFT;
+
 	ocr_avail = 0;
-	if (caps & SDHCI_CAN_VDD_330)
+	/*
+	 * According to SD Host Controller spec v3.00, if the Host System
+	 * can afford more than 150mA, Host Driver should set XPC to 1. Also
+	 * the value is meaningful only if Voltage Support in the Capabilities
+	 * register is set. The actual current value is 4 times the register
+	 * value.
+	 */
+	max_current_caps = sdhci_readl(host, SDHCI_MAX_CURRENT);
+
+	if (caps[0] & SDHCI_CAN_VDD_330) {
+		int max_current_330;
+
 		ocr_avail |= MMC_VDD_32_33 | MMC_VDD_33_34;
-	if (caps & SDHCI_CAN_VDD_300)
+
+		max_current_330 = ((max_current_caps &
+				   SDHCI_MAX_CURRENT_330_MASK) >>
+				   SDHCI_MAX_CURRENT_330_SHIFT) *
+				   SDHCI_MAX_CURRENT_MULTIPLIER;
+
+		if (max_current_330 > 150)
+			mmc->caps |= MMC_CAP_SET_XPC_330;
+	}
+	if (caps[0] & SDHCI_CAN_VDD_300) {
+		int max_current_300;
+
 		ocr_avail |= MMC_VDD_29_30 | MMC_VDD_30_31;
-	if (caps & SDHCI_CAN_VDD_180)
+
+		max_current_300 = ((max_current_caps &
+				   SDHCI_MAX_CURRENT_300_MASK) >>
+				   SDHCI_MAX_CURRENT_300_SHIFT) *
+				   SDHCI_MAX_CURRENT_MULTIPLIER;
+
+		if (max_current_300 > 150)
+			mmc->caps |= MMC_CAP_SET_XPC_300;
+	}
+	if (caps[0] & SDHCI_CAN_VDD_180) {
+		int max_current_180;
+
 		ocr_avail |= MMC_VDD_165_195;
 
+		max_current_180 = ((max_current_caps &
+				   SDHCI_MAX_CURRENT_180_MASK) >>
+				   SDHCI_MAX_CURRENT_180_SHIFT) *
+				   SDHCI_MAX_CURRENT_MULTIPLIER;
+
+		if (max_current_180 > 150)
+			mmc->caps |= MMC_CAP_SET_XPC_180;
+
+		/* Maximum current capabilities of the host at 1.8V */
+		if (max_current_180 >= 800)
+			mmc->caps |= MMC_CAP_MAX_CURRENT_800;
+		else if (max_current_180 >= 600)
+			mmc->caps |= MMC_CAP_MAX_CURRENT_600;
+		else if (max_current_180 >= 400)
+			mmc->caps |= MMC_CAP_MAX_CURRENT_400;
+		else
+			mmc->caps |= MMC_CAP_MAX_CURRENT_200;
+	}
+
 	mmc->ocr_avail = ocr_avail;
 	mmc->ocr_avail_sdio = ocr_avail;
 	if (host->ocr_avail_sdio)
@@ -1972,7 +2679,7 @@ int sdhci_add_host(struct sdhci_host *host)
 	if (host->quirks & SDHCI_QUIRK_FORCE_BLK_SZ_2048) {
 		mmc->max_blk_size = 2;
 	} else {
-		mmc->max_blk_size = (caps & SDHCI_MAX_BLOCK_MASK) >>
+		mmc->max_blk_size = (caps[0] & SDHCI_MAX_BLOCK_MASK) >>
 				SDHCI_MAX_BLOCK_SHIFT;
 		if (mmc->max_blk_size >= 3) {
 			printk(KERN_WARNING "%s: Invalid maximum block size, "
@@ -1998,6 +2705,15 @@ int sdhci_add_host(struct sdhci_host *host)
 
 	setup_timer(&host->timer, sdhci_timeout_timer, (unsigned long)host);
 
+	if (host->version >= SDHCI_SPEC_300) {
+		init_waitqueue_head(&host->buf_ready_int);
+
+		/* Initialize re-tuning timer */
+		init_timer(&host->tuning_timer);
+		host->tuning_timer.data = (unsigned long)host;
+		host->tuning_timer.function = sdhci_tuning_timer;
+	}
+
 	ret = request_irq(host->irq, sdhci_irq, IRQF_SHARED,
 		mmc_hostname(mmc), host);
 	if (ret)
@@ -2091,6 +2807,8 @@ void sdhci_remove_host(struct sdhci_host *host, int dead)
 	free_irq(host->irq, host);
 
 	del_timer_sync(&host->timer);
+	if (host->version >= SDHCI_SPEC_300)
+		del_timer_sync(&host->tuning_timer);
 
 	tasklet_kill(&host->card_tasklet);
 	tasklet_kill(&host->finish_tasklet);
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 25e8bde600d..745c42fa41e 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -25,6 +25,7 @@
  */
 
 #define SDHCI_DMA_ADDRESS	0x00
+#define SDHCI_ARGUMENT2		SDHCI_DMA_ADDRESS
 
 #define SDHCI_BLOCK_SIZE	0x04
 #define  SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
@@ -36,7 +37,8 @@
 #define SDHCI_TRANSFER_MODE	0x0C
 #define  SDHCI_TRNS_DMA		0x01
 #define  SDHCI_TRNS_BLK_CNT_EN	0x02
-#define  SDHCI_TRNS_ACMD12	0x04
+#define  SDHCI_TRNS_AUTO_CMD12	0x04
+#define  SDHCI_TRNS_AUTO_CMD23	0x08
 #define  SDHCI_TRNS_READ	0x10
 #define  SDHCI_TRNS_MULTI	0x20
 
@@ -68,8 +70,10 @@
 #define  SDHCI_DATA_AVAILABLE	0x00000800
 #define  SDHCI_CARD_PRESENT	0x00010000
 #define  SDHCI_WRITE_PROTECT	0x00080000
+#define  SDHCI_DATA_LVL_MASK	0x00F00000
+#define   SDHCI_DATA_LVL_SHIFT	20
 
-#define SDHCI_HOST_CONTROL 	0x28
+#define SDHCI_HOST_CONTROL	0x28
 #define  SDHCI_CTRL_LED		0x01
 #define  SDHCI_CTRL_4BITBUS	0x02
 #define  SDHCI_CTRL_HISPD	0x04
@@ -99,6 +103,7 @@
 #define  SDHCI_DIV_MASK	0xFF
 #define  SDHCI_DIV_MASK_LEN	8
 #define  SDHCI_DIV_HI_MASK	0x300
+#define  SDHCI_PROG_CLOCK_MODE	0x0020
 #define  SDHCI_CLOCK_CARD_EN	0x0004
 #define  SDHCI_CLOCK_INT_STABLE	0x0002
 #define  SDHCI_CLOCK_INT_EN	0x0001
@@ -146,7 +151,22 @@
 
 #define SDHCI_ACMD12_ERR	0x3C
 
-/* 3E-3F reserved */
+#define SDHCI_HOST_CONTROL2		0x3E
+#define  SDHCI_CTRL_UHS_MASK		0x0007
+#define   SDHCI_CTRL_UHS_SDR12		0x0000
+#define   SDHCI_CTRL_UHS_SDR25		0x0001
+#define   SDHCI_CTRL_UHS_SDR50		0x0002
+#define   SDHCI_CTRL_UHS_SDR104		0x0003
+#define   SDHCI_CTRL_UHS_DDR50		0x0004
+#define  SDHCI_CTRL_VDD_180		0x0008
+#define  SDHCI_CTRL_DRV_TYPE_MASK	0x0030
+#define   SDHCI_CTRL_DRV_TYPE_B		0x0000
+#define   SDHCI_CTRL_DRV_TYPE_A		0x0010
+#define   SDHCI_CTRL_DRV_TYPE_C		0x0020
+#define   SDHCI_CTRL_DRV_TYPE_D		0x0030
+#define  SDHCI_CTRL_EXEC_TUNING		0x0040
+#define  SDHCI_CTRL_TUNED_CLK		0x0080
+#define  SDHCI_CTRL_PRESET_VAL_ENABLE	0x8000
 
 #define SDHCI_CAPABILITIES	0x40
 #define  SDHCI_TIMEOUT_CLK_MASK	0x0000003F
@@ -167,9 +187,30 @@
 #define  SDHCI_CAN_VDD_180	0x04000000
 #define  SDHCI_CAN_64BIT	0x10000000
 
+#define  SDHCI_SUPPORT_SDR50	0x00000001
+#define  SDHCI_SUPPORT_SDR104	0x00000002
+#define  SDHCI_SUPPORT_DDR50	0x00000004
+#define  SDHCI_DRIVER_TYPE_A	0x00000010
+#define  SDHCI_DRIVER_TYPE_C	0x00000020
+#define  SDHCI_DRIVER_TYPE_D	0x00000040
+#define  SDHCI_RETUNING_TIMER_COUNT_MASK	0x00000F00
+#define  SDHCI_RETUNING_TIMER_COUNT_SHIFT	8
+#define  SDHCI_USE_SDR50_TUNING			0x00002000
+#define  SDHCI_RETUNING_MODE_MASK		0x0000C000
+#define  SDHCI_RETUNING_MODE_SHIFT		14
+#define  SDHCI_CLOCK_MUL_MASK	0x00FF0000
+#define  SDHCI_CLOCK_MUL_SHIFT	16
+
 #define SDHCI_CAPABILITIES_1	0x44
 
-#define SDHCI_MAX_CURRENT	0x48
+#define SDHCI_MAX_CURRENT		0x48
+#define  SDHCI_MAX_CURRENT_330_MASK	0x0000FF
+#define  SDHCI_MAX_CURRENT_330_SHIFT	0
+#define  SDHCI_MAX_CURRENT_300_MASK	0x00FF00
+#define  SDHCI_MAX_CURRENT_300_SHIFT	8
+#define  SDHCI_MAX_CURRENT_180_MASK	0xFF0000
+#define  SDHCI_MAX_CURRENT_180_SHIFT	16
+#define   SDHCI_MAX_CURRENT_MULTIPLIER	4
 
 /* 4C-4F reserved for more max current */
 
@@ -202,6 +243,12 @@
 #define SDHCI_MAX_DIV_SPEC_200	256
 #define SDHCI_MAX_DIV_SPEC_300	2046
 
+/*
+ * Host SDMA buffer boundary. Valid values from 4K to 512K in powers of 2.
+ */
+#define SDHCI_DEFAULT_BOUNDARY_SIZE  (512 * 1024)
+#define SDHCI_DEFAULT_BOUNDARY_ARG   (ilog2(SDHCI_DEFAULT_BOUNDARY_SIZE) - 12)
+
 struct sdhci_ops {
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
 	u32		(*read_l)(struct sdhci_host *host, int reg);
@@ -223,6 +270,10 @@ struct sdhci_ops {
 	void (*platform_send_init_74_clocks)(struct sdhci_host *host,
 					     u8 power_mode);
 	unsigned int    (*get_ro)(struct sdhci_host *host);
+	void	(*platform_reset_enter)(struct sdhci_host *host, u8 mask);
+	void	(*platform_reset_exit)(struct sdhci_host *host, u8 mask);
+	int	(*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
+
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index af97015a2fc..14f8edbaa19 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -29,6 +29,8 @@
 #include <linux/mmc/sh_mmcif.h>
 #include <linux/pagemap.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/spinlock.h>
 
 #define DRIVER_NAME	"sh_mmcif"
 #define DRIVER_VERSION	"2010-04-28"
@@ -153,6 +155,12 @@
 #define CLKDEV_MMC_DATA		20000000 /* 20MHz */
 #define CLKDEV_INIT		400000   /* 400 KHz */
 
+enum mmcif_state {
+	STATE_IDLE,
+	STATE_REQUEST,
+	STATE_IOS,
+};
+
 struct sh_mmcif_host {
 	struct mmc_host *mmc;
 	struct mmc_data *data;
@@ -164,6 +172,9 @@ struct sh_mmcif_host {
 	long timeout;
 	void __iomem *addr;
 	struct completion intr_wait;
+	enum mmcif_state state;
+	spinlock_t lock;
+	bool power;
 
 	/* DMA support */
 	struct dma_chan		*chan_rx;
@@ -798,17 +809,31 @@ static void sh_mmcif_stop_cmd(struct sh_mmcif_host *host,
 static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct sh_mmcif_host *host = mmc_priv(mmc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	if (host->state != STATE_IDLE) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		mrq->cmd->error = -EAGAIN;
+		mmc_request_done(mmc, mrq);
+		return;
+	}
+
+	host->state = STATE_REQUEST;
+	spin_unlock_irqrestore(&host->lock, flags);
 
 	switch (mrq->cmd->opcode) {
 	/* MMCIF does not support SD/SDIO command */
 	case SD_IO_SEND_OP_COND:
 	case MMC_APP_CMD:
+		host->state = STATE_IDLE;
 		mrq->cmd->error = -ETIMEDOUT;
 		mmc_request_done(mmc, mrq);
 		return;
 	case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
 		if (!mrq->data) {
 			/* send_if_cond cmd (not support) */
+			host->state = STATE_IDLE;
 			mrq->cmd->error = -ETIMEDOUT;
 			mmc_request_done(mmc, mrq);
 			return;
@@ -830,12 +855,9 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	sh_mmcif_start_cmd(host, mrq, mrq->cmd);
 	host->data = NULL;
 
-	if (mrq->cmd->error != 0) {
-		mmc_request_done(mmc, mrq);
-		return;
-	}
-	if (mrq->stop)
+	if (!mrq->cmd->error && mrq->stop)
 		sh_mmcif_stop_cmd(host, mrq, mrq->stop);
+	host->state = STATE_IDLE;
 	mmc_request_done(mmc, mrq);
 }
 
@@ -843,15 +865,39 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct sh_mmcif_host *host = mmc_priv(mmc);
 	struct sh_mmcif_plat_data *p = host->pd->dev.platform_data;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	if (host->state != STATE_IDLE) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		return;
+	}
+
+	host->state = STATE_IOS;
+	spin_unlock_irqrestore(&host->lock, flags);
 
 	if (ios->power_mode == MMC_POWER_UP) {
 		if (p->set_pwr)
 			p->set_pwr(host->pd, ios->power_mode);
+		if (!host->power) {
+			/* See if we also get DMA */
+			sh_mmcif_request_dma(host, host->pd->dev.platform_data);
+			pm_runtime_get_sync(&host->pd->dev);
+			host->power = true;
+		}
 	} else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
 		/* clock stop */
 		sh_mmcif_clock_control(host, 0);
-		if (ios->power_mode == MMC_POWER_OFF && p->down_pwr)
-			p->down_pwr(host->pd);
+		if (ios->power_mode == MMC_POWER_OFF) {
+			if (host->power) {
+				pm_runtime_put(&host->pd->dev);
+				sh_mmcif_release_dma(host);
+				host->power = false;
+			}
+			if (p->down_pwr)
+				p->down_pwr(host->pd);
+		}
+		host->state = STATE_IDLE;
 		return;
 	}
 
@@ -859,6 +905,7 @@ static void sh_mmcif_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		sh_mmcif_clock_control(host, ios->clock);
 
 	host->bus_width = ios->bus_width;
+	host->state = STATE_IDLE;
 }
 
 static int sh_mmcif_get_cd(struct mmc_host *mmc)
@@ -925,7 +972,7 @@ static irqreturn_t sh_mmcif_intr(int irq, void *dev_id)
 		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
 		err = 1;
 	} else {
-		dev_dbg(&host->pd->dev, "Not support int\n");
+		dev_dbg(&host->pd->dev, "Unsupported interrupt: 0x%x\n", state);
 		sh_mmcif_writel(host->addr, MMCIF_CE_INT, ~state);
 		sh_mmcif_bitclr(host, MMCIF_CE_INT_MASK, state);
 		err = 1;
@@ -996,6 +1043,7 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 	host->pd = pdev;
 
 	init_completion(&host->intr_wait);
+	spin_lock_init(&host->lock);
 
 	mmc->ops = &sh_mmcif_ops;
 	mmc->f_max = host->clk;
@@ -1020,24 +1068,29 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 	sh_mmcif_sync_reset(host);
 	platform_set_drvdata(pdev, host);
 
-	/* See if we also get DMA */
-	sh_mmcif_request_dma(host, pd);
+	pm_runtime_enable(&pdev->dev);
+	host->power = false;
+
+	ret = pm_runtime_resume(&pdev->dev);
+	if (ret < 0)
+		goto clean_up2;
 
 	mmc_add_host(mmc);
 
+	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
+
 	ret = request_irq(irq[0], sh_mmcif_intr, 0, "sh_mmc:error", host);
 	if (ret) {
 		dev_err(&pdev->dev, "request_irq error (sh_mmc:error)\n");
-		goto clean_up2;
+		goto clean_up3;
 	}
 	ret = request_irq(irq[1], sh_mmcif_intr, 0, "sh_mmc:int", host);
 	if (ret) {
 		free_irq(irq[0], host);
 		dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n");
-		goto clean_up2;
+		goto clean_up3;
 	}
 
-	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
 	sh_mmcif_detect(host->mmc);
 
 	dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION);
@@ -1045,7 +1098,11 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev)
 		sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff);
 	return ret;
 
+clean_up3:
+	mmc_remove_host(mmc);
+	pm_runtime_suspend(&pdev->dev);
 clean_up2:
+	pm_runtime_disable(&pdev->dev);
 	clk_disable(host->hclk);
 clean_up1:
 	mmc_free_host(mmc);
@@ -1060,14 +1117,14 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
 	struct sh_mmcif_host *host = platform_get_drvdata(pdev);
 	int irq[2];
 
+	pm_runtime_get_sync(&pdev->dev);
+
 	mmc_remove_host(host->mmc);
-	sh_mmcif_release_dma(host);
+	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
 
 	if (host->addr)
 		iounmap(host->addr);
 
-	sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
-
 	irq[0] = platform_get_irq(pdev, 0);
 	irq[1] = platform_get_irq(pdev, 1);
 
@@ -1078,15 +1135,52 @@ static int __devexit sh_mmcif_remove(struct platform_device *pdev)
 
 	clk_disable(host->hclk);
 	mmc_free_host(host->mmc);
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
 
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int sh_mmcif_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct sh_mmcif_host *host = platform_get_drvdata(pdev);
+	int ret = mmc_suspend_host(host->mmc);
+
+	if (!ret) {
+		sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL);
+		clk_disable(host->hclk);
+	}
+
+	return ret;
+}
+
+static int sh_mmcif_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct sh_mmcif_host *host = platform_get_drvdata(pdev);
+
+	clk_enable(host->hclk);
+
+	return mmc_resume_host(host->mmc);
+}
+#else
+#define sh_mmcif_suspend	NULL
+#define sh_mmcif_resume		NULL
+#endif	/* CONFIG_PM */
+
+static const struct dev_pm_ops sh_mmcif_dev_pm_ops = {
+	.suspend = sh_mmcif_suspend,
+	.resume = sh_mmcif_resume,
+};
+
 static struct platform_driver sh_mmcif_driver = {
 	.probe		= sh_mmcif_probe,
 	.remove		= sh_mmcif_remove,
 	.driver		= {
 		.name	= DRIVER_NAME,
+		.pm	= &sh_mmcif_dev_pm_ops,
 	},
 };
 
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index cc701236d16..b3654293017 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -62,7 +62,7 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
 	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
 	struct tmio_mmc_host *host;
 	char clk_name[8];
-	int ret;
+	int i, irq, ret;
 
 	priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
 	if (priv == NULL) {
@@ -71,6 +71,7 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
 	}
 
 	mmc_data = &priv->mmc_data;
+	p->pdata = mmc_data;
 
 	snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
 	priv->clk = clk_get(&pdev->dev, clk_name);
@@ -116,11 +117,36 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto eprobe;
 
-	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
-		(unsigned long)host->ctl, host->irq);
+	for (i = 0; i < 3; i++) {
+		irq = platform_get_irq(pdev, i);
+		if (irq < 0) {
+			if (i) {
+				continue;
+			} else {
+				ret = irq;
+				goto eirq;
+			}
+		}
+		ret = request_irq(irq, tmio_mmc_irq, 0,
+				  dev_name(&pdev->dev), host);
+		if (ret) {
+			while (i--) {
+				irq = platform_get_irq(pdev, i);
+				if (irq >= 0)
+					free_irq(irq, host);
+			}
+			goto eirq;
+		}
+	}
+	dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
+		 mmc_hostname(host->mmc), (unsigned long)
+		 (platform_get_resource(pdev,IORESOURCE_MEM, 0)->start),
+		 mmc_data->hclk / 1000000);
 
 	return ret;
 
+eirq:
+	tmio_mmc_host_remove(host);
 eprobe:
 	clk_disable(priv->clk);
 	clk_put(priv->clk);
@@ -134,6 +160,16 @@ static int sh_mobile_sdhi_remove(struct platform_device *pdev)
 	struct mmc_host *mmc = platform_get_drvdata(pdev);
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 	struct sh_mobile_sdhi *priv = container_of(host->pdata, struct sh_mobile_sdhi, mmc_data);
+	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+	int i, irq;
+
+	p->pdata = NULL;
+
+	for (i = 0; i < 3; i++) {
+		irq = platform_get_irq(pdev, i);
+		if (irq >= 0)
+			free_irq(irq, host);
+	}
 
 	tmio_mmc_host_remove(host);
 	clk_disable(priv->clk);
@@ -143,10 +179,18 @@ static int sh_mobile_sdhi_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
+	.suspend = tmio_mmc_host_suspend,
+	.resume = tmio_mmc_host_resume,
+	.runtime_suspend = tmio_mmc_host_runtime_suspend,
+	.runtime_resume = tmio_mmc_host_runtime_resume,
+};
+
 static struct platform_driver sh_mobile_sdhi_driver = {
 	.driver		= {
 		.name	= "sh_mobile_sdhi",
 		.owner	= THIS_MODULE,
+		.pm	= &tmio_mmc_dev_pm_ops,
 	},
 	.probe		= sh_mobile_sdhi_probe,
 	.remove		= __devexit_p(sh_mobile_sdhi_remove),
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 79c568461d5..14479f9ef53 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -30,7 +30,7 @@ static int tmio_mmc_suspend(struct platform_device *dev, pm_message_t state)
 	struct mmc_host *mmc = platform_get_drvdata(dev);
 	int ret;
 
-	ret = mmc_suspend_host(mmc);
+	ret = tmio_mmc_host_suspend(&dev->dev);
 
 	/* Tell MFD core it can disable us now.*/
 	if (!ret && cell->disable)
@@ -46,15 +46,12 @@ static int tmio_mmc_resume(struct platform_device *dev)
 	int ret = 0;
 
 	/* Tell the MFD core we are ready to be enabled */
-	if (cell->resume) {
+	if (cell->resume)
 		ret = cell->resume(dev);
-		if (ret)
-			goto out;
-	}
 
-	mmc_resume_host(mmc);
+	if (!ret)
+		ret = tmio_mmc_host_resume(&dev->dev);
 
-out:
 	return ret;
 }
 #else
@@ -67,7 +64,7 @@ static int __devinit tmio_mmc_probe(struct platform_device *pdev)
 	const struct mfd_cell *cell = mfd_get_cell(pdev);
 	struct tmio_mmc_data *pdata;
 	struct tmio_mmc_host *host;
-	int ret = -EINVAL;
+	int ret = -EINVAL, irq;
 
 	if (pdev->num_resources != 2)
 		goto out;
@@ -76,6 +73,12 @@ static int __devinit tmio_mmc_probe(struct platform_device *pdev)
 	if (!pdata || !pdata->hclk)
 		goto out;
 
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		ret = irq;
+		goto out;
+	}
+
 	/* Tell the MFD core we are ready to be enabled */
 	if (cell->enable) {
 		ret = cell->enable(pdev);
@@ -87,11 +90,18 @@ static int __devinit tmio_mmc_probe(struct platform_device *pdev)
 	if (ret)
 		goto cell_disable;
 
+	ret = request_irq(irq, tmio_mmc_irq, IRQF_DISABLED |
+			  IRQF_TRIGGER_FALLING, dev_name(&pdev->dev), host);
+	if (ret)
+		goto host_remove;
+
 	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
-		(unsigned long)host->ctl, host->irq);
+		(unsigned long)host->ctl, irq);
 
 	return 0;
 
+host_remove:
+	tmio_mmc_host_remove(host);
 cell_disable:
 	if (cell->disable)
 		cell->disable(pdev);
@@ -107,7 +117,9 @@ static int __devexit tmio_mmc_remove(struct platform_device *pdev)
 	platform_set_drvdata(pdev, NULL);
 
 	if (mmc) {
-		tmio_mmc_host_remove(mmc_priv(mmc));
+		struct tmio_mmc_host *host = mmc_priv(mmc);
+		free_irq(platform_get_irq(pdev, 0), host);
+		tmio_mmc_host_remove(host);
 		if (cell->disable)
 			cell->disable(pdev);
 	}
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 099ed49a259..8260bc2c34e 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -19,6 +19,7 @@
 #include <linux/highmem.h>
 #include <linux/mmc/tmio.h>
 #include <linux/pagemap.h>
+#include <linux/spinlock.h>
 
 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
 #define TMIO_SDIO_STAT_IOIRQ	0x0001
@@ -44,13 +45,14 @@ struct tmio_mmc_host {
 	struct mmc_request      *mrq;
 	struct mmc_data         *data;
 	struct mmc_host         *mmc;
-	int                     irq;
 	unsigned int		sdio_irq_enabled;
 
 	/* Callbacks for clock / power control */
 	void (*set_pwr)(struct platform_device *host, int state);
 	void (*set_clk_div)(struct platform_device *host, int state);
 
+	int			pm_error;
+
 	/* pio related stuff */
 	struct scatterlist      *sg_ptr;
 	struct scatterlist      *sg_orig;
@@ -83,6 +85,7 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
 
 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
+irqreturn_t tmio_mmc_irq(int irq, void *devid);
 
 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 					 unsigned long *flags)
@@ -120,4 +123,15 @@ static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 }
 #endif
 
+#ifdef CONFIG_PM
+int tmio_mmc_host_suspend(struct device *dev);
+int tmio_mmc_host_resume(struct device *dev);
+#else
+#define tmio_mmc_host_suspend NULL
+#define tmio_mmc_host_resume NULL
+#endif
+
+int tmio_mmc_host_runtime_suspend(struct device *dev);
+int tmio_mmc_host_runtime_resume(struct device *dev);
+
 #endif
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index d3de74ab633..25f1ad6cbe0 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -256,7 +256,10 @@ static bool tmio_mmc_filter(struct dma_chan *chan, void *arg)
 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata)
 {
 	/* We can only either use DMA for both Tx and Rx or not use it at all */
-	if (pdata->dma) {
+	if (!pdata->dma)
+		return;
+
+	if (!host->chan_tx && !host->chan_rx) {
 		dma_cap_mask_t mask;
 
 		dma_cap_zero(mask);
@@ -284,18 +287,18 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
 
 		tasklet_init(&host->dma_complete, tmio_mmc_tasklet_fn, (unsigned long)host);
 		tasklet_init(&host->dma_issue, tmio_mmc_issue_tasklet_fn, (unsigned long)host);
+	}
 
-		tmio_mmc_enable_dma(host, true);
+	tmio_mmc_enable_dma(host, true);
+
+	return;
 
-		return;
 ebouncebuf:
-		dma_release_channel(host->chan_rx);
-		host->chan_rx = NULL;
+	dma_release_channel(host->chan_rx);
+	host->chan_rx = NULL;
 ereqrx:
-		dma_release_channel(host->chan_tx);
-		host->chan_tx = NULL;
-		return;
-	}
+	dma_release_channel(host->chan_tx);
+	host->chan_tx = NULL;
 }
 
 void tmio_mmc_release_dma(struct tmio_mmc_host *host)
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 710339a85c8..ad6347bb02d 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -39,6 +39,7 @@
 #include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/scatterlist.h>
 #include <linux/workqueue.h>
 #include <linux/spinlock.h>
@@ -243,8 +244,12 @@ static void tmio_mmc_reset_work(struct work_struct *work)
 	spin_lock_irqsave(&host->lock, flags);
 	mrq = host->mrq;
 
-	/* request already finished */
-	if (!mrq
+	/*
+	 * is request already finished? Since we use a non-blocking
+	 * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
+	 * us, so, have to check for IS_ERR(host->mrq)
+	 */
+	if (IS_ERR_OR_NULL(mrq)
 	    || time_is_after_jiffies(host->last_req_ts +
 		msecs_to_jiffies(2000))) {
 		spin_unlock_irqrestore(&host->lock, flags);
@@ -264,16 +269,19 @@ static void tmio_mmc_reset_work(struct work_struct *work)
 
 	host->cmd = NULL;
 	host->data = NULL;
-	host->mrq = NULL;
 	host->force_pio = false;
 
 	spin_unlock_irqrestore(&host->lock, flags);
 
 	tmio_mmc_reset(host);
 
+	/* Ready for new calls */
+	host->mrq = NULL;
+
 	mmc_request_done(host->mmc, mrq);
 }
 
+/* called with host->lock held, interrupts disabled */
 static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
 {
 	struct mmc_request *mrq = host->mrq;
@@ -281,13 +289,15 @@ static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
 	if (!mrq)
 		return;
 
-	host->mrq = NULL;
 	host->cmd = NULL;
 	host->data = NULL;
 	host->force_pio = false;
 
 	cancel_delayed_work(&host->delayed_reset_work);
 
+	host->mrq = NULL;
+
+	/* FIXME: mmc_request_done() can schedule! */
 	mmc_request_done(host->mmc, mrq);
 }
 
@@ -554,7 +564,7 @@ out:
 	spin_unlock(&host->lock);
 }
 
-static irqreturn_t tmio_mmc_irq(int irq, void *devid)
+irqreturn_t tmio_mmc_irq(int irq, void *devid)
 {
 	struct tmio_mmc_host *host = devid;
 	struct tmio_mmc_data *pdata = host->pdata;
@@ -649,6 +659,7 @@ static irqreturn_t tmio_mmc_irq(int irq, void *devid)
 out:
 	return IRQ_HANDLED;
 }
+EXPORT_SYMBOL(tmio_mmc_irq);
 
 static int tmio_mmc_start_data(struct tmio_mmc_host *host,
 	struct mmc_data *data)
@@ -685,15 +696,27 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
 static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct tmio_mmc_host *host = mmc_priv(mmc);
+	unsigned long flags;
 	int ret;
 
-	if (host->mrq)
+	spin_lock_irqsave(&host->lock, flags);
+
+	if (host->mrq) {
 		pr_debug("request not null\n");
+		if (IS_ERR(host->mrq)) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			mrq->cmd->error = -EAGAIN;
+			mmc_request_done(mmc, mrq);
+			return;
+		}
+	}
 
 	host->last_req_ts = jiffies;
 	wmb();
 	host->mrq = mrq;
 
+	spin_unlock_irqrestore(&host->lock, flags);
+
 	if (mrq->data) {
 		ret = tmio_mmc_start_data(host, mrq->data);
 		if (ret)
@@ -708,8 +731,8 @@ static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 	}
 
 fail:
-	host->mrq = NULL;
 	host->force_pio = false;
+	host->mrq = NULL;
 	mrq->cmd->error = ret;
 	mmc_request_done(mmc, mrq);
 }
@@ -723,19 +746,54 @@ fail:
 static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct tmio_mmc_data *pdata = host->pdata;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	if (host->mrq) {
+		if (IS_ERR(host->mrq)) {
+			dev_dbg(&host->pdev->dev,
+				"%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
+				current->comm, task_pid_nr(current),
+				ios->clock, ios->power_mode);
+			host->mrq = ERR_PTR(-EINTR);
+		} else {
+			dev_dbg(&host->pdev->dev,
+				"%s.%d: CMD%u active since %lu, now %lu!\n",
+				current->comm, task_pid_nr(current),
+				host->mrq->cmd->opcode, host->last_req_ts, jiffies);
+		}
+		spin_unlock_irqrestore(&host->lock, flags);
+		return;
+	}
+
+	host->mrq = ERR_PTR(-EBUSY);
+
+	spin_unlock_irqrestore(&host->lock, flags);
 
 	if (ios->clock)
 		tmio_mmc_set_clock(host, ios->clock);
 
 	/* Power sequence - OFF -> UP -> ON */
 	if (ios->power_mode == MMC_POWER_UP) {
+		if ((pdata->flags & TMIO_MMC_HAS_COLD_CD) && !pdata->power) {
+			pm_runtime_get_sync(&host->pdev->dev);
+			pdata->power = true;
+		}
 		/* power up SD bus */
 		if (host->set_pwr)
 			host->set_pwr(host->pdev, 1);
 	} else if (ios->power_mode == MMC_POWER_OFF || !ios->clock) {
 		/* power down SD bus */
-		if (ios->power_mode == MMC_POWER_OFF && host->set_pwr)
-			host->set_pwr(host->pdev, 0);
+		if (ios->power_mode == MMC_POWER_OFF) {
+			if (host->set_pwr)
+				host->set_pwr(host->pdev, 0);
+			if ((pdata->flags & TMIO_MMC_HAS_COLD_CD) &&
+			    pdata->power) {
+				pdata->power = false;
+				pm_runtime_put(&host->pdev->dev);
+			}
+		}
 		tmio_mmc_clk_stop(host);
 	} else {
 		/* start bus clock */
@@ -753,6 +811,12 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 	/* Let things settle. delay taken from winCE driver */
 	udelay(140);
+	if (PTR_ERR(host->mrq) == -EINTR)
+		dev_dbg(&host->pdev->dev,
+			"%s.%d: IOS interrupted: clk %u, mode %u",
+			current->comm, task_pid_nr(current),
+			ios->clock, ios->power_mode);
+	host->mrq = NULL;
 }
 
 static int tmio_mmc_get_ro(struct mmc_host *mmc)
@@ -801,6 +865,7 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 	if (!mmc)
 		return -ENOMEM;
 
+	pdata->dev = &pdev->dev;
 	_host = mmc_priv(mmc);
 	_host->pdata = pdata;
 	_host->mmc = mmc;
@@ -834,24 +899,19 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 	else
 		mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
 
-	tmio_mmc_clk_stop(_host);
-	tmio_mmc_reset(_host);
-
-	ret = platform_get_irq(pdev, 0);
+	pdata->power = false;
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_runtime_resume(&pdev->dev);
 	if (ret < 0)
-		goto unmap_ctl;
+		goto pm_disable;
 
-	_host->irq = ret;
+	tmio_mmc_clk_stop(_host);
+	tmio_mmc_reset(_host);
 
 	tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
 	if (pdata->flags & TMIO_MMC_SDIO_IRQ)
 		tmio_mmc_enable_sdio_irq(mmc, 0);
 
-	ret = request_irq(_host->irq, tmio_mmc_irq, IRQF_DISABLED |
-		IRQF_TRIGGER_FALLING, dev_name(&pdev->dev), _host);
-	if (ret)
-		goto unmap_ctl;
-
 	spin_lock_init(&_host->lock);
 
 	/* Init delayed work for request timeouts */
@@ -860,6 +920,10 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 	/* See if we also get DMA */
 	tmio_mmc_request_dma(_host, pdata);
 
+	/* We have to keep the device powered for its card detection to work */
+	if (!(pdata->flags & TMIO_MMC_HAS_COLD_CD))
+		pm_runtime_get_noresume(&pdev->dev);
+
 	mmc_add_host(mmc);
 
 	/* Unmask the IRQs we want to know about */
@@ -874,7 +938,8 @@ int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
 
 	return 0;
 
-unmap_ctl:
+pm_disable:
+	pm_runtime_disable(&pdev->dev);
 	iounmap(_host->ctl);
 host_free:
 	mmc_free_host(mmc);
@@ -885,13 +950,88 @@ EXPORT_SYMBOL(tmio_mmc_host_probe);
 
 void tmio_mmc_host_remove(struct tmio_mmc_host *host)
 {
+	struct platform_device *pdev = host->pdev;
+
+	/*
+	 * We don't have to manipulate pdata->power here: if there is a card in
+	 * the slot, the runtime PM is active and our .runtime_resume() will not
+	 * be run. If there is no card in the slot and the platform can suspend
+	 * the controller, the runtime PM is suspended and pdata->power == false,
+	 * so, our .runtime_resume() will not try to detect a card in the slot.
+	 */
+	if (host->pdata->flags & TMIO_MMC_HAS_COLD_CD)
+		pm_runtime_get_sync(&pdev->dev);
+
 	mmc_remove_host(host->mmc);
 	cancel_delayed_work_sync(&host->delayed_reset_work);
 	tmio_mmc_release_dma(host);
-	free_irq(host->irq, host);
+
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
 	iounmap(host->ctl);
 	mmc_free_host(host->mmc);
 }
 EXPORT_SYMBOL(tmio_mmc_host_remove);
 
+#ifdef CONFIG_PM
+int tmio_mmc_host_suspend(struct device *dev)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	int ret = mmc_suspend_host(mmc);
+
+	if (!ret)
+		tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
+
+	host->pm_error = pm_runtime_put_sync(dev);
+
+	return ret;
+}
+EXPORT_SYMBOL(tmio_mmc_host_suspend);
+
+int tmio_mmc_host_resume(struct device *dev)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	/* The MMC core will perform the complete set up */
+	host->pdata->power = false;
+
+	if (!host->pm_error)
+		pm_runtime_get_sync(dev);
+
+	tmio_mmc_reset(mmc_priv(mmc));
+	tmio_mmc_request_dma(host, host->pdata);
+
+	return mmc_resume_host(mmc);
+}
+EXPORT_SYMBOL(tmio_mmc_host_resume);
+
+#endif	/* CONFIG_PM */
+
+int tmio_mmc_host_runtime_suspend(struct device *dev)
+{
+	return 0;
+}
+EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
+
+int tmio_mmc_host_runtime_resume(struct device *dev)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct tmio_mmc_data *pdata = host->pdata;
+
+	tmio_mmc_reset(host);
+
+	if (pdata->power) {
+		/* Only entered after a card-insert interrupt */
+		tmio_mmc_set_ios(mmc, &mmc->ios);
+		mmc_detect_change(mmc, msecs_to_jiffies(100));
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
+
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/vub300.c b/drivers/mmc/host/vub300.c
new file mode 100644
index 00000000000..cbb03305b77
--- /dev/null
+++ b/drivers/mmc/host/vub300.c
@@ -0,0 +1,2506 @@
+/*
+ * Remote VUB300 SDIO/SDmem Host Controller Driver
+ *
+ * Copyright (C) 2010 Elan Digital Systems Limited
+ *
+ * based on USB Skeleton driver - 2.2
+ *
+ * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
+ *
+ * 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 the Free Software Foundation, version 2
+ *
+ * VUB300: is a USB 2.0 client device with a single SDIO/SDmem/MMC slot
+ *         Any SDIO/SDmem/MMC device plugged into the VUB300 will appear,
+ *         by virtue of this driver, to have been plugged into a local
+ *         SDIO host controller, similar to, say, a PCI Ricoh controller
+ *         This is because this kernel device driver is both a USB 2.0
+ *         client device driver AND an MMC host controller driver. Thus
+ *         if there is an existing driver for the inserted SDIO/SDmem/MMC
+ *         device then that driver will be used by the kernel to manage
+ *         the device in exactly the same fashion as if it had been
+ *         directly plugged into, say, a local pci bus Ricoh controller
+ *
+ * RANT: this driver was written using a display 128x48 - converting it
+ *       to a line width of 80 makes it very difficult to support. In
+ *       particular functions have been broken down into sub functions
+ *       and the original meaningful names have been shortened into
+ *       cryptic ones.
+ *       The problem is that executing a fragment of code subject to
+ *       two conditions means an indentation of 24, thus leaving only
+ *       56 characters for a C statement. And that is quite ridiculous!
+ *
+ * Data types: data passed to/from the VUB300 is fixed to a number of
+ *             bits and driver data fields reflect that limit by using
+ *             u8, u16, u32
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kref.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/mutex.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/workqueue.h>
+#include <linux/ctype.h>
+#include <linux/firmware.h>
+#include <linux/scatterlist.h>
+
+struct host_controller_info {
+	u8 info_size;
+	u16 firmware_version;
+	u8 number_of_ports;
+} __packed;
+
+#define FIRMWARE_BLOCK_BOUNDARY 1024
+struct sd_command_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	u8 command_type; /* Bit7 - Rd/Wr */
+	u8 command_index;
+	u8 transfer_size[4]; /* ReadSize + ReadSize */
+	u8 response_type;
+	u8 arguments[4];
+	u8 block_count[2];
+	u8 block_size[2];
+	u8 block_boundary[2];
+	u8 reserved[44]; /* to pad out to 64 bytes */
+} __packed;
+
+struct sd_irqpoll_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	u8 command_type; /* Bit7 - Rd/Wr */
+	u8 padding[16]; /* don't ask why !! */
+	u8 poll_timeout_msb;
+	u8 poll_timeout_lsb;
+	u8 reserved[42]; /* to pad out to 64 bytes */
+} __packed;
+
+struct sd_common_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+} __packed;
+
+struct sd_response_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	u8 command_type;
+	u8 command_index;
+	u8 command_response[0];
+} __packed;
+
+struct sd_status_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	u16 port_flags;
+	u32 sdio_clock;
+	u16 host_header_size;
+	u16 func_header_size;
+	u16 ctrl_header_size;
+} __packed;
+
+struct sd_error_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	u8 error_code;
+} __packed;
+
+struct sd_interrupt_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+} __packed;
+
+struct offload_registers_access {
+	u8 command_byte[4];
+	u8 Respond_Byte[4];
+} __packed;
+
+#define INTERRUPT_REGISTER_ACCESSES 15
+struct sd_offloaded_interrupt {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	struct offload_registers_access reg[INTERRUPT_REGISTER_ACCESSES];
+} __packed;
+
+struct sd_register_header {
+	u8 header_size;
+	u8 header_type;
+	u8 port_number;
+	u8 command_type;
+	u8 command_index;
+	u8 command_response[6];
+} __packed;
+
+#define PIGGYBACK_REGISTER_ACCESSES 14
+struct sd_offloaded_piggyback {
+	struct sd_register_header sdio;
+	struct offload_registers_access reg[PIGGYBACK_REGISTER_ACCESSES];
+} __packed;
+
+union sd_response {
+	struct sd_common_header common;
+	struct sd_status_header status;
+	struct sd_error_header error;
+	struct sd_interrupt_header interrupt;
+	struct sd_response_header response;
+	struct sd_offloaded_interrupt irq;
+	struct sd_offloaded_piggyback pig;
+} __packed;
+
+union sd_command {
+	struct sd_command_header head;
+	struct sd_irqpoll_header poll;
+} __packed;
+
+enum SD_RESPONSE_TYPE {
+	SDRT_UNSPECIFIED = 0,
+	SDRT_NONE,
+	SDRT_1,
+	SDRT_1B,
+	SDRT_2,
+	SDRT_3,
+	SDRT_4,
+	SDRT_5,
+	SDRT_5B,
+	SDRT_6,
+	SDRT_7,
+};
+
+#define RESPONSE_INTERRUPT			0x01
+#define RESPONSE_ERROR				0x02
+#define RESPONSE_STATUS				0x03
+#define RESPONSE_IRQ_DISABLED			0x05
+#define RESPONSE_IRQ_ENABLED			0x06
+#define RESPONSE_PIGGYBACKED			0x07
+#define RESPONSE_NO_INTERRUPT			0x08
+#define RESPONSE_PIG_DISABLED			0x09
+#define RESPONSE_PIG_ENABLED			0x0A
+#define SD_ERROR_1BIT_TIMEOUT			0x01
+#define SD_ERROR_4BIT_TIMEOUT			0x02
+#define SD_ERROR_1BIT_CRC_WRONG			0x03
+#define SD_ERROR_4BIT_CRC_WRONG			0x04
+#define SD_ERROR_1BIT_CRC_ERROR			0x05
+#define SD_ERROR_4BIT_CRC_ERROR			0x06
+#define SD_ERROR_NO_CMD_ENDBIT			0x07
+#define SD_ERROR_NO_1BIT_DATEND			0x08
+#define SD_ERROR_NO_4BIT_DATEND			0x09
+#define SD_ERROR_1BIT_UNEXPECTED_TIMEOUT	0x0A
+#define SD_ERROR_4BIT_UNEXPECTED_TIMEOUT	0x0B
+#define SD_ERROR_ILLEGAL_COMMAND		0x0C
+#define SD_ERROR_NO_DEVICE			0x0D
+#define SD_ERROR_TRANSFER_LENGTH		0x0E
+#define SD_ERROR_1BIT_DATA_TIMEOUT		0x0F
+#define SD_ERROR_4BIT_DATA_TIMEOUT		0x10
+#define SD_ERROR_ILLEGAL_STATE			0x11
+#define SD_ERROR_UNKNOWN_ERROR			0x12
+#define SD_ERROR_RESERVED_ERROR			0x13
+#define SD_ERROR_INVALID_FUNCTION		0x14
+#define SD_ERROR_OUT_OF_RANGE			0x15
+#define SD_ERROR_STAT_CMD			0x16
+#define SD_ERROR_STAT_DATA			0x17
+#define SD_ERROR_STAT_CMD_TIMEOUT		0x18
+#define SD_ERROR_SDCRDY_STUCK			0x19
+#define SD_ERROR_UNHANDLED			0x1A
+#define SD_ERROR_OVERRUN			0x1B
+#define SD_ERROR_PIO_TIMEOUT			0x1C
+
+#define FUN(c) (0x000007 & (c->arg>>28))
+#define REG(c) (0x01FFFF & (c->arg>>9))
+
+static int limit_speed_to_24_MHz;
+module_param(limit_speed_to_24_MHz, bool, 0644);
+MODULE_PARM_DESC(limit_speed_to_24_MHz, "Limit Max SDIO Clock Speed to 24 MHz");
+
+static int pad_input_to_usb_pkt;
+module_param(pad_input_to_usb_pkt, bool, 0644);
+MODULE_PARM_DESC(pad_input_to_usb_pkt,
+		 "Pad USB data input transfers to whole USB Packet");
+
+static int disable_offload_processing;
+module_param(disable_offload_processing, bool, 0644);
+MODULE_PARM_DESC(disable_offload_processing, "Disable Offload Processing");
+
+static int force_1_bit_data_xfers;
+module_param(force_1_bit_data_xfers, bool, 0644);
+MODULE_PARM_DESC(force_1_bit_data_xfers,
+		 "Force SDIO Data Transfers to 1-bit Mode");
+
+static int force_polling_for_irqs;
+module_param(force_polling_for_irqs, bool, 0644);
+MODULE_PARM_DESC(force_polling_for_irqs, "Force Polling for SDIO interrupts");
+
+static int firmware_irqpoll_timeout = 1024;
+module_param(firmware_irqpoll_timeout, int, 0644);
+MODULE_PARM_DESC(firmware_irqpoll_timeout, "VUB300 firmware irqpoll timeout");
+
+static int force_max_req_size = 128;
+module_param(force_max_req_size, int, 0644);
+MODULE_PARM_DESC(force_max_req_size, "set max request size in kBytes");
+
+#ifdef SMSC_DEVELOPMENT_BOARD
+static int firmware_rom_wait_states = 0x04;
+#else
+static int firmware_rom_wait_states = 0x1C;
+#endif
+
+module_param(firmware_rom_wait_states, bool, 0644);
+MODULE_PARM_DESC(firmware_rom_wait_states,
+		 "ROM wait states byte=RRRIIEEE (Reserved Internal External)");
+
+#define ELAN_VENDOR_ID		0x2201
+#define VUB300_VENDOR_ID	0x0424
+#define VUB300_PRODUCT_ID	0x012C
+static struct usb_device_id vub300_table[] = {
+	{USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)},
+	{USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)},
+	{} /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, vub300_table);
+
+static struct workqueue_struct *cmndworkqueue;
+static struct workqueue_struct *pollworkqueue;
+static struct workqueue_struct *deadworkqueue;
+
+static inline int interface_to_InterfaceNumber(struct usb_interface *interface)
+{
+	if (!interface)
+		return -1;
+	if (!interface->cur_altsetting)
+		return -1;
+	return interface->cur_altsetting->desc.bInterfaceNumber;
+}
+
+struct sdio_register {
+	unsigned func_num:3;
+	unsigned sdio_reg:17;
+	unsigned activate:1;
+	unsigned prepared:1;
+	unsigned regvalue:8;
+	unsigned response:8;
+	unsigned sparebit:26;
+};
+
+struct vub300_mmc_host {
+	struct usb_device *udev;
+	struct usb_interface *interface;
+	struct kref kref;
+	struct mutex cmd_mutex;
+	struct mutex irq_mutex;
+	char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */
+	u8 cmnd_out_ep; /* EndPoint for commands */
+	u8 cmnd_res_ep; /* EndPoint for responses */
+	u8 data_out_ep; /* EndPoint for out data */
+	u8 data_inp_ep; /* EndPoint for inp data */
+	bool card_powered;
+	bool card_present;
+	bool read_only;
+	bool large_usb_packets;
+	bool app_spec; /* ApplicationSpecific */
+	bool irq_enabled; /* by the MMC CORE */
+	bool irq_disabled; /* in the firmware */
+	unsigned bus_width:4;
+	u8 total_offload_count;
+	u8 dynamic_register_count;
+	u8 resp_len;
+	u32 datasize;
+	int errors;
+	int usb_transport_fail;
+	int usb_timed_out;
+	int irqs_queued;
+	struct sdio_register sdio_register[16];
+	struct offload_interrupt_function_register {
+#define MAXREGBITS 4
+#define MAXREGS (1<<MAXREGBITS)
+#define MAXREGMASK (MAXREGS-1)
+		u8 offload_count;
+		u32 offload_point;
+		struct offload_registers_access reg[MAXREGS];
+	} fn[8];
+	u16 fbs[8]; /* Function Block Size */
+	struct mmc_command *cmd;
+	struct mmc_request *req;
+	struct mmc_data *data;
+	struct mmc_host *mmc;
+	struct urb *urb;
+	struct urb *command_out_urb;
+	struct urb *command_res_urb;
+	struct completion command_complete;
+	struct completion irqpoll_complete;
+	union sd_command cmnd;
+	union sd_response resp;
+	struct timer_list sg_transfer_timer;
+	struct usb_sg_request sg_request;
+	struct timer_list inactivity_timer;
+	struct work_struct deadwork;
+	struct work_struct cmndwork;
+	struct delayed_work pollwork;
+	struct host_controller_info hc_info;
+	struct sd_status_header system_port_status;
+	u8 padded_buffer[64];
+};
+
+#define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref)
+#define SET_TRANSFER_PSEUDOCODE		21
+#define SET_INTERRUPT_PSEUDOCODE	20
+#define SET_FAILURE_MODE		18
+#define SET_ROM_WAIT_STATES		16
+#define SET_IRQ_ENABLE			13
+#define SET_CLOCK_SPEED			11
+#define SET_FUNCTION_BLOCK_SIZE		9
+#define SET_SD_DATA_MODE		6
+#define SET_SD_POWER			4
+#define ENTER_DFU_MODE			3
+#define GET_HC_INF0			1
+#define GET_SYSTEM_PORT_STATUS		0
+
+static void vub300_delete(struct kref *kref)
+{				/* kref callback - softirq */
+	struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref);
+	struct mmc_host *mmc = vub300->mmc;
+	usb_free_urb(vub300->command_out_urb);
+	vub300->command_out_urb = NULL;
+	usb_free_urb(vub300->command_res_urb);
+	vub300->command_res_urb = NULL;
+	usb_put_dev(vub300->udev);
+	mmc_free_host(mmc);
+	/*
+	 * and hence also frees vub300
+	 * which is contained at the end of struct mmc
+	 */
+}
+
+static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300)
+{
+	kref_get(&vub300->kref);
+	if (queue_work(cmndworkqueue, &vub300->cmndwork)) {
+		/*
+		 * then the cmndworkqueue was not previously
+		 * running and the above get ref is obvious
+		 * required and will be put when the thread
+		 * terminates by a specific call
+		 */
+	} else {
+		/*
+		 * the cmndworkqueue was already running from
+		 * a previous invocation and thus to keep the
+		 * kref counts correct we must undo the get
+		 */
+		kref_put(&vub300->kref, vub300_delete);
+	}
+}
+
+static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay)
+{
+	kref_get(&vub300->kref);
+	if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) {
+		/*
+		 * then the pollworkqueue was not previously
+		 * running and the above get ref is obvious
+		 * required and will be put when the thread
+		 * terminates by a specific call
+		 */
+	} else {
+		/*
+		 * the pollworkqueue was already running from
+		 * a previous invocation and thus to keep the
+		 * kref counts correct we must undo the get
+		 */
+		kref_put(&vub300->kref, vub300_delete);
+	}
+}
+
+static void vub300_queue_dead_work(struct vub300_mmc_host *vub300)
+{
+	kref_get(&vub300->kref);
+	if (queue_work(deadworkqueue, &vub300->deadwork)) {
+		/*
+		 * then the deadworkqueue was not previously
+		 * running and the above get ref is obvious
+		 * required and will be put when the thread
+		 * terminates by a specific call
+		 */
+	} else {
+		/*
+		 * the deadworkqueue was already running from
+		 * a previous invocation and thus to keep the
+		 * kref counts correct we must undo the get
+		 */
+		kref_put(&vub300->kref, vub300_delete);
+	}
+}
+
+static void irqpoll_res_completed(struct urb *urb)
+{				/* urb completion handler - hardirq */
+	struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+	if (urb->status)
+		vub300->usb_transport_fail = urb->status;
+	complete(&vub300->irqpoll_complete);
+}
+
+static void irqpoll_out_completed(struct urb *urb)
+{				/* urb completion handler - hardirq */
+	struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+	if (urb->status) {
+		vub300->usb_transport_fail = urb->status;
+		complete(&vub300->irqpoll_complete);
+		return;
+	} else {
+		int ret;
+		unsigned int pipe =
+			usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
+		usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
+				  &vub300->resp, sizeof(vub300->resp),
+				  irqpoll_res_completed, vub300);
+		vub300->command_res_urb->actual_length = 0;
+		ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
+		if (ret) {
+			vub300->usb_transport_fail = ret;
+			complete(&vub300->irqpoll_complete);
+		}
+		return;
+	}
+}
+
+static void send_irqpoll(struct vub300_mmc_host *vub300)
+{
+	/* cmd_mutex is held by vub300_pollwork_thread */
+	int retval;
+	int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout);
+	vub300->cmnd.poll.header_size = 22;
+	vub300->cmnd.poll.header_type = 1;
+	vub300->cmnd.poll.port_number = 0;
+	vub300->cmnd.poll.command_type = 2;
+	vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout;
+	vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8);
+	usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
+			  usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep)
+			  , &vub300->cmnd, sizeof(vub300->cmnd)
+			  , irqpoll_out_completed, vub300);
+	retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
+	if (0 > retval) {
+		vub300->usb_transport_fail = retval;
+		vub300_queue_poll_work(vub300, 1);
+		complete(&vub300->irqpoll_complete);
+		return;
+	} else {
+		return;
+	}
+}
+
+static void new_system_port_status(struct vub300_mmc_host *vub300)
+{
+	int old_card_present = vub300->card_present;
+	int new_card_present =
+		(0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
+	vub300->read_only =
+		(0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
+	if (new_card_present && !old_card_present) {
+		dev_info(&vub300->udev->dev, "card just inserted\n");
+		vub300->card_present = 1;
+		vub300->bus_width = 0;
+		if (disable_offload_processing)
+			strncpy(vub300->vub_name, "EMPTY Processing Disabled",
+				sizeof(vub300->vub_name));
+		else
+			vub300->vub_name[0] = 0;
+		mmc_detect_change(vub300->mmc, 1);
+	} else if (!new_card_present && old_card_present) {
+		dev_info(&vub300->udev->dev, "card just ejected\n");
+		vub300->card_present = 0;
+		mmc_detect_change(vub300->mmc, 0);
+	} else {
+		/* no change */
+	}
+}
+
+static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300,
+					struct offload_registers_access
+					*register_access, u8 func)
+{
+	u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count;
+	memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access,
+	       sizeof(struct offload_registers_access));
+	vub300->fn[func].offload_count += 1;
+	vub300->total_offload_count += 1;
+}
+
+static void add_offloaded_reg(struct vub300_mmc_host *vub300,
+			      struct offload_registers_access *register_access)
+{
+	u32 Register = ((0x03 & register_access->command_byte[0]) << 15)
+			| ((0xFF & register_access->command_byte[1]) << 7)
+			| ((0xFE & register_access->command_byte[2]) >> 1);
+	u8 func = ((0x70 & register_access->command_byte[0]) >> 4);
+	u8 regs = vub300->dynamic_register_count;
+	u8 i = 0;
+	while (0 < regs-- && 1 == vub300->sdio_register[i].activate) {
+		if (vub300->sdio_register[i].func_num == func &&
+		    vub300->sdio_register[i].sdio_reg == Register) {
+			if (vub300->sdio_register[i].prepared == 0)
+				vub300->sdio_register[i].prepared = 1;
+			vub300->sdio_register[i].response =
+				register_access->Respond_Byte[2];
+			vub300->sdio_register[i].regvalue =
+				register_access->Respond_Byte[3];
+			return;
+		} else {
+			i += 1;
+			continue;
+		}
+	};
+	__add_offloaded_reg_to_fifo(vub300, register_access, func);
+}
+
+static void check_vub300_port_status(struct vub300_mmc_host *vub300)
+{
+	/*
+	 * cmd_mutex is held by vub300_pollwork_thread,
+	 * vub300_deadwork_thread or vub300_cmndwork_thread
+	 */
+	int retval;
+	retval =
+		usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+				GET_SYSTEM_PORT_STATUS,
+				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				0x0000, 0x0000, &vub300->system_port_status,
+				sizeof(vub300->system_port_status), HZ);
+	if (sizeof(vub300->system_port_status) == retval)
+		new_system_port_status(vub300);
+}
+
+static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300)
+{
+	/* cmd_mutex is held by vub300_pollwork_thread */
+	if (vub300->command_res_urb->actual_length == 0)
+		return;
+
+	switch (vub300->resp.common.header_type) {
+	case RESPONSE_INTERRUPT:
+		mutex_lock(&vub300->irq_mutex);
+		if (vub300->irq_enabled)
+			mmc_signal_sdio_irq(vub300->mmc);
+		else
+			vub300->irqs_queued += 1;
+		vub300->irq_disabled = 1;
+		mutex_unlock(&vub300->irq_mutex);
+		break;
+	case RESPONSE_ERROR:
+		if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE)
+			check_vub300_port_status(vub300);
+		break;
+	case RESPONSE_STATUS:
+		vub300->system_port_status = vub300->resp.status;
+		new_system_port_status(vub300);
+		if (!vub300->card_present)
+			vub300_queue_poll_work(vub300, HZ / 5);
+		break;
+	case RESPONSE_IRQ_DISABLED:
+	{
+		int offloaded_data_length = vub300->resp.common.header_size - 3;
+		int register_count = offloaded_data_length >> 3;
+		int ri = 0;
+		while (register_count--) {
+			add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
+			ri += 1;
+		}
+		mutex_lock(&vub300->irq_mutex);
+		if (vub300->irq_enabled)
+			mmc_signal_sdio_irq(vub300->mmc);
+		else
+			vub300->irqs_queued += 1;
+		vub300->irq_disabled = 1;
+		mutex_unlock(&vub300->irq_mutex);
+		break;
+	}
+	case RESPONSE_IRQ_ENABLED:
+	{
+		int offloaded_data_length = vub300->resp.common.header_size - 3;
+		int register_count = offloaded_data_length >> 3;
+		int ri = 0;
+		while (register_count--) {
+			add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
+			ri += 1;
+		}
+		mutex_lock(&vub300->irq_mutex);
+		if (vub300->irq_enabled)
+			mmc_signal_sdio_irq(vub300->mmc);
+		else if (vub300->irqs_queued)
+			vub300->irqs_queued += 1;
+		else
+			vub300->irqs_queued += 1;
+		vub300->irq_disabled = 0;
+		mutex_unlock(&vub300->irq_mutex);
+		break;
+	}
+	case RESPONSE_NO_INTERRUPT:
+		vub300_queue_poll_work(vub300, 1);
+		break;
+	default:
+		break;
+	}
+}
+
+static void __do_poll(struct vub300_mmc_host *vub300)
+{
+	/* cmd_mutex is held by vub300_pollwork_thread */
+	long commretval;
+	mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+	init_completion(&vub300->irqpoll_complete);
+	send_irqpoll(vub300);
+	commretval = wait_for_completion_timeout(&vub300->irqpoll_complete,
+						 msecs_to_jiffies(500));
+	if (vub300->usb_transport_fail) {
+		/* no need to do anything */
+	} else if (commretval == 0) {
+		vub300->usb_timed_out = 1;
+		usb_kill_urb(vub300->command_out_urb);
+		usb_kill_urb(vub300->command_res_urb);
+	} else if (commretval < 0) {
+		vub300_queue_poll_work(vub300, 1);
+	} else { /* commretval > 0 */
+		__vub300_irqpoll_response(vub300);
+	}
+}
+
+/* this thread runs only when the driver
+ * is trying to poll the device for an IRQ
+ */
+static void vub300_pollwork_thread(struct work_struct *work)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = container_of(work,
+			      struct vub300_mmc_host, pollwork.work);
+	if (!vub300->interface) {
+		kref_put(&vub300->kref, vub300_delete);
+		return;
+	}
+	mutex_lock(&vub300->cmd_mutex);
+	if (vub300->cmd) {
+		vub300_queue_poll_work(vub300, 1);
+	} else if (!vub300->card_present) {
+		/* no need to do anything */
+	} else { /* vub300->card_present */
+		mutex_lock(&vub300->irq_mutex);
+		if (!vub300->irq_enabled) {
+			mutex_unlock(&vub300->irq_mutex);
+		} else if (vub300->irqs_queued) {
+			vub300->irqs_queued -= 1;
+			mmc_signal_sdio_irq(vub300->mmc);
+			mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+			mutex_unlock(&vub300->irq_mutex);
+		} else { /* NOT vub300->irqs_queued */
+			mutex_unlock(&vub300->irq_mutex);
+			__do_poll(vub300);
+		}
+	}
+	mutex_unlock(&vub300->cmd_mutex);
+	kref_put(&vub300->kref, vub300_delete);
+}
+
+static void vub300_deadwork_thread(struct work_struct *work)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 =
+		container_of(work, struct vub300_mmc_host, deadwork);
+	if (!vub300->interface) {
+		kref_put(&vub300->kref, vub300_delete);
+		return;
+	}
+	mutex_lock(&vub300->cmd_mutex);
+	if (vub300->cmd) {
+		/*
+		 * a command got in as the inactivity
+		 * timer expired - so we just let the
+		 * processing of the command show if
+		 * the device is dead
+		 */
+	} else if (vub300->card_present) {
+		check_vub300_port_status(vub300);
+	} else if (vub300->mmc && vub300->mmc->card &&
+		   mmc_card_present(vub300->mmc->card)) {
+		/*
+		 * the MMC core must not have responded
+		 * to the previous indication - lets
+		 * hope that it eventually does so we
+		 * will just ignore this for now
+		 */
+	} else {
+		check_vub300_port_status(vub300);
+	}
+	mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+	mutex_unlock(&vub300->cmd_mutex);
+	kref_put(&vub300->kref, vub300_delete);
+}
+
+static void vub300_inactivity_timer_expired(unsigned long data)
+{				/* softirq */
+	struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
+	if (!vub300->interface) {
+		kref_put(&vub300->kref, vub300_delete);
+	} else if (vub300->cmd) {
+		mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+	} else {
+		vub300_queue_dead_work(vub300);
+		mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+	}
+}
+
+static int vub300_response_error(u8 error_code)
+{
+	switch (error_code) {
+	case SD_ERROR_PIO_TIMEOUT:
+	case SD_ERROR_1BIT_TIMEOUT:
+	case SD_ERROR_4BIT_TIMEOUT:
+		return -ETIMEDOUT;
+	case SD_ERROR_STAT_DATA:
+	case SD_ERROR_OVERRUN:
+	case SD_ERROR_STAT_CMD:
+	case SD_ERROR_STAT_CMD_TIMEOUT:
+	case SD_ERROR_SDCRDY_STUCK:
+	case SD_ERROR_UNHANDLED:
+	case SD_ERROR_1BIT_CRC_WRONG:
+	case SD_ERROR_4BIT_CRC_WRONG:
+	case SD_ERROR_1BIT_CRC_ERROR:
+	case SD_ERROR_4BIT_CRC_ERROR:
+	case SD_ERROR_NO_CMD_ENDBIT:
+	case SD_ERROR_NO_1BIT_DATEND:
+	case SD_ERROR_NO_4BIT_DATEND:
+	case SD_ERROR_1BIT_DATA_TIMEOUT:
+	case SD_ERROR_4BIT_DATA_TIMEOUT:
+	case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT:
+	case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT:
+		return -EILSEQ;
+	case 33:
+		return -EILSEQ;
+	case SD_ERROR_ILLEGAL_COMMAND:
+		return -EINVAL;
+	case SD_ERROR_NO_DEVICE:
+		return -ENOMEDIUM;
+	default:
+		return -ENODEV;
+	}
+}
+
+static void command_res_completed(struct urb *urb)
+{				/* urb completion handler - hardirq */
+	struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+	if (urb->status) {
+		/* we have to let the initiator handle the error */
+	} else if (vub300->command_res_urb->actual_length == 0) {
+		/*
+		 * we have seen this happen once or twice and
+		 * we suspect a buggy USB host controller
+		 */
+	} else if (!vub300->data) {
+		/* this means that the command (typically CMD52) suceeded */
+	} else if (vub300->resp.common.header_type != 0x02) {
+		/*
+		 * this is an error response from the VUB300 chip
+		 * and we let the initiator handle it
+		 */
+	} else if (vub300->urb) {
+		vub300->cmd->error =
+			vub300_response_error(vub300->resp.error.error_code);
+		usb_unlink_urb(vub300->urb);
+	} else {
+		vub300->cmd->error =
+			vub300_response_error(vub300->resp.error.error_code);
+		usb_sg_cancel(&vub300->sg_request);
+	}
+	complete(&vub300->command_complete);	/* got_response_in */
+}
+
+static void command_out_completed(struct urb *urb)
+{				/* urb completion handler - hardirq */
+	struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+	if (urb->status) {
+		complete(&vub300->command_complete);
+	} else {
+		int ret;
+		unsigned int pipe =
+			usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
+		usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
+				  &vub300->resp, sizeof(vub300->resp),
+				  command_res_completed, vub300);
+		vub300->command_res_urb->actual_length = 0;
+		ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
+		if (ret == 0) {
+			/*
+			 * the urb completion handler will call
+			 * our completion handler
+			 */
+		} else {
+			/*
+			 * and thus we only call it directly
+			 * when it will not be called
+			 */
+			complete(&vub300->command_complete);
+		}
+	}
+}
+
+/*
+ * the STUFF bits are masked out for the comparisons
+ */
+static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300,
+					   u32 cmd_arg)
+{
+	if ((0xFBFFFE00 & cmd_arg) == 0x80022200)
+		vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80022000)
+		vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80042200)
+		vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80042000)
+		vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80062200)
+		vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80062000)
+		vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80082200)
+		vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x80082000)
+		vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200)
+		vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000)
+		vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200)
+		vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000)
+		vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200)
+		vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]);
+	else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000)
+		vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]);
+	else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00)
+		vub300->bus_width = 1;
+	else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02)
+		vub300->bus_width = 4;
+}
+
+static void send_command(struct vub300_mmc_host *vub300)
+{
+	/* cmd_mutex is held by vub300_cmndwork_thread */
+	struct mmc_command *cmd = vub300->cmd;
+	struct mmc_data *data = vub300->data;
+	int retval;
+	int i;
+	u8 response_type;
+	if (vub300->app_spec) {
+		switch (cmd->opcode) {
+		case 6:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			if (0x00000000 == (0x00000003 & cmd->arg))
+				vub300->bus_width = 1;
+			else if (0x00000002 == (0x00000003 & cmd->arg))
+				vub300->bus_width = 4;
+			else
+				dev_err(&vub300->udev->dev,
+					"unexpected ACMD6 bus_width=%d\n",
+					0x00000003 & cmd->arg);
+			break;
+		case 13:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 22:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 23:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 41:
+			response_type = SDRT_3;
+			vub300->resp_len = 6;
+			break;
+		case 42:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 51:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 55:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		default:
+			vub300->resp_len = 0;
+			cmd->error = -EINVAL;
+			complete(&vub300->command_complete);
+			return;
+		}
+		vub300->app_spec = 0;
+	} else {
+		switch (cmd->opcode) {
+		case 0:
+			response_type = SDRT_NONE;
+			vub300->resp_len = 0;
+			break;
+		case 1:
+			response_type = SDRT_3;
+			vub300->resp_len = 6;
+			break;
+		case 2:
+			response_type = SDRT_2;
+			vub300->resp_len = 17;
+			break;
+		case 3:
+			response_type = SDRT_6;
+			vub300->resp_len = 6;
+			break;
+		case 4:
+			response_type = SDRT_NONE;
+			vub300->resp_len = 0;
+			break;
+		case 5:
+			response_type = SDRT_4;
+			vub300->resp_len = 6;
+			break;
+		case 6:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 7:
+			response_type = SDRT_1B;
+			vub300->resp_len = 6;
+			break;
+		case 8:
+			response_type = SDRT_7;
+			vub300->resp_len = 6;
+			break;
+		case 9:
+			response_type = SDRT_2;
+			vub300->resp_len = 17;
+			break;
+		case 10:
+			response_type = SDRT_2;
+			vub300->resp_len = 17;
+			break;
+		case 12:
+			response_type = SDRT_1B;
+			vub300->resp_len = 6;
+			break;
+		case 13:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 15:
+			response_type = SDRT_NONE;
+			vub300->resp_len = 0;
+			break;
+		case 16:
+			for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
+				vub300->fbs[i] = 0xFFFF & cmd->arg;
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 17:
+		case 18:
+		case 24:
+		case 25:
+		case 27:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 28:
+		case 29:
+			response_type = SDRT_1B;
+			vub300->resp_len = 6;
+			break;
+		case 30:
+		case 32:
+		case 33:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 38:
+			response_type = SDRT_1B;
+			vub300->resp_len = 6;
+			break;
+		case 42:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		case 52:
+			response_type = SDRT_5;
+			vub300->resp_len = 6;
+			snoop_block_size_and_bus_width(vub300, cmd->arg);
+			break;
+		case 53:
+			response_type = SDRT_5;
+			vub300->resp_len = 6;
+			break;
+		case 55:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			vub300->app_spec = 1;
+			break;
+		case 56:
+			response_type = SDRT_1;
+			vub300->resp_len = 6;
+			break;
+		default:
+			vub300->resp_len = 0;
+			cmd->error = -EINVAL;
+			complete(&vub300->command_complete);
+			return;
+		}
+	}
+	/*
+	 * it is a shame that we can not use "sizeof(struct sd_command_header)"
+	 * this is because the packet _must_ be padded to 64 bytes
+	 */
+	vub300->cmnd.head.header_size = 20;
+	vub300->cmnd.head.header_type = 0x00;
+	vub300->cmnd.head.port_number = 0; /* "0" means port 1 */
+	vub300->cmnd.head.command_type = 0x00; /* standard read command */
+	vub300->cmnd.head.response_type = response_type;
+	vub300->cmnd.head.command_index = cmd->opcode;
+	vub300->cmnd.head.arguments[0] = cmd->arg >> 24;
+	vub300->cmnd.head.arguments[1] = cmd->arg >> 16;
+	vub300->cmnd.head.arguments[2] = cmd->arg >> 8;
+	vub300->cmnd.head.arguments[3] = cmd->arg >> 0;
+	if (cmd->opcode == 52) {
+		int fn = 0x7 & (cmd->arg >> 28);
+		vub300->cmnd.head.block_count[0] = 0;
+		vub300->cmnd.head.block_count[1] = 0;
+		vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF;
+		vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF;
+		vub300->cmnd.head.command_type = 0x00;
+		vub300->cmnd.head.transfer_size[0] = 0;
+		vub300->cmnd.head.transfer_size[1] = 0;
+		vub300->cmnd.head.transfer_size[2] = 0;
+		vub300->cmnd.head.transfer_size[3] = 0;
+	} else if (!data) {
+		vub300->cmnd.head.block_count[0] = 0;
+		vub300->cmnd.head.block_count[1] = 0;
+		vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF;
+		vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF;
+		vub300->cmnd.head.command_type = 0x00;
+		vub300->cmnd.head.transfer_size[0] = 0;
+		vub300->cmnd.head.transfer_size[1] = 0;
+		vub300->cmnd.head.transfer_size[2] = 0;
+		vub300->cmnd.head.transfer_size[3] = 0;
+	} else if (cmd->opcode == 53) {
+		int fn = 0x7 & (cmd->arg >> 28);
+		if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */
+			vub300->cmnd.head.block_count[0] =
+				(data->blocks >> 8) & 0xFF;
+			vub300->cmnd.head.block_count[1] =
+				(data->blocks >> 0) & 0xFF;
+			vub300->cmnd.head.block_size[0] =
+				(data->blksz >> 8) & 0xFF;
+			vub300->cmnd.head.block_size[1] =
+				(data->blksz >> 0) & 0xFF;
+		} else {	/* BYTE MODE */
+			vub300->cmnd.head.block_count[0] = 0;
+			vub300->cmnd.head.block_count[1] = 0;
+			vub300->cmnd.head.block_size[0] =
+				(vub300->datasize >> 8) & 0xFF;
+			vub300->cmnd.head.block_size[1] =
+				(vub300->datasize >> 0) & 0xFF;
+		}
+		vub300->cmnd.head.command_type =
+			(MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
+		vub300->cmnd.head.transfer_size[0] =
+			(vub300->datasize >> 24) & 0xFF;
+		vub300->cmnd.head.transfer_size[1] =
+			(vub300->datasize >> 16) & 0xFF;
+		vub300->cmnd.head.transfer_size[2] =
+			(vub300->datasize >> 8) & 0xFF;
+		vub300->cmnd.head.transfer_size[3] =
+			(vub300->datasize >> 0) & 0xFF;
+		if (vub300->datasize < vub300->fbs[fn]) {
+			vub300->cmnd.head.block_count[0] = 0;
+			vub300->cmnd.head.block_count[1] = 0;
+		}
+	} else {
+		vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF;
+		vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF;
+		vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF;
+		vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF;
+		vub300->cmnd.head.command_type =
+			(MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
+		vub300->cmnd.head.transfer_size[0] =
+			(vub300->datasize >> 24) & 0xFF;
+		vub300->cmnd.head.transfer_size[1] =
+			(vub300->datasize >> 16) & 0xFF;
+		vub300->cmnd.head.transfer_size[2] =
+			(vub300->datasize >> 8) & 0xFF;
+		vub300->cmnd.head.transfer_size[3] =
+			(vub300->datasize >> 0) & 0xFF;
+		if (vub300->datasize < vub300->fbs[0]) {
+			vub300->cmnd.head.block_count[0] = 0;
+			vub300->cmnd.head.block_count[1] = 0;
+		}
+	}
+	if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) {
+		u16 block_size = vub300->cmnd.head.block_size[1] |
+			(vub300->cmnd.head.block_size[0] << 8);
+		u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY -
+			(FIRMWARE_BLOCK_BOUNDARY % block_size);
+		vub300->cmnd.head.block_boundary[0] =
+			(block_boundary >> 8) & 0xFF;
+		vub300->cmnd.head.block_boundary[1] =
+			(block_boundary >> 0) & 0xFF;
+	} else {
+		vub300->cmnd.head.block_boundary[0] = 0;
+		vub300->cmnd.head.block_boundary[1] = 0;
+	}
+	usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
+			  usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep),
+			  &vub300->cmnd, sizeof(vub300->cmnd),
+			  command_out_completed, vub300);
+	retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
+	if (retval < 0) {
+		cmd->error = retval;
+		complete(&vub300->command_complete);
+		return;
+	} else {
+		return;
+	}
+}
+
+/*
+ * timer callback runs in atomic mode
+ *       so it cannot call usb_kill_urb()
+ */
+static void vub300_sg_timed_out(unsigned long data)
+{
+	struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
+	vub300->usb_timed_out = 1;
+	usb_sg_cancel(&vub300->sg_request);
+	usb_unlink_urb(vub300->command_out_urb);
+	usb_unlink_urb(vub300->command_res_urb);
+}
+
+static u16 roundup_to_multiple_of_64(u16 number)
+{
+	return 0xFFC0 & (0x3F + number);
+}
+
+/*
+ * this is a separate function to solve the 80 column width restriction
+ */
+static void __download_offload_pseudocode(struct vub300_mmc_host *vub300,
+					  const struct firmware *fw)
+{
+	u8 register_count = 0;
+	u16 ts = 0;
+	u16 interrupt_size = 0;
+	const u8 *data = fw->data;
+	int size = fw->size;
+	u8 c;
+	dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n",
+		 vub300->vub_name);
+	do {
+		c = *data++;
+	} while (size-- && c); /* skip comment */
+	dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data,
+		 vub300->vub_name);
+	if (size < 4) {
+		dev_err(&vub300->udev->dev,
+			"corrupt offload pseudocode in firmware %s\n",
+			vub300->vub_name);
+		strncpy(vub300->vub_name, "corrupt offload pseudocode",
+			sizeof(vub300->vub_name));
+		return;
+	}
+	interrupt_size += *data++;
+	size -= 1;
+	interrupt_size <<= 8;
+	interrupt_size += *data++;
+	size -= 1;
+	if (interrupt_size < size) {
+		u16 xfer_length = roundup_to_multiple_of_64(interrupt_size);
+		u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
+		if (xfer_buffer) {
+			int retval;
+			memcpy(xfer_buffer, data, interrupt_size);
+			memset(xfer_buffer + interrupt_size, 0,
+			       xfer_length - interrupt_size);
+			size -= interrupt_size;
+			data += interrupt_size;
+			retval =
+				usb_control_msg(vub300->udev,
+						usb_sndctrlpipe(vub300->udev, 0),
+						SET_INTERRUPT_PSEUDOCODE,
+						USB_DIR_OUT | USB_TYPE_VENDOR |
+						USB_RECIP_DEVICE, 0x0000, 0x0000,
+						xfer_buffer, xfer_length, HZ);
+			kfree(xfer_buffer);
+			if (retval < 0) {
+				strncpy(vub300->vub_name,
+					"SDIO pseudocode download failed",
+					sizeof(vub300->vub_name));
+				return;
+			}
+		} else {
+			dev_err(&vub300->udev->dev,
+				"not enough memory for xfer buffer to send"
+				" INTERRUPT_PSEUDOCODE for %s %s\n", fw->data,
+				vub300->vub_name);
+			strncpy(vub300->vub_name,
+				"SDIO interrupt pseudocode download failed",
+				sizeof(vub300->vub_name));
+			return;
+		}
+	} else {
+		dev_err(&vub300->udev->dev,
+			"corrupt interrupt pseudocode in firmware %s %s\n",
+			fw->data, vub300->vub_name);
+		strncpy(vub300->vub_name, "corrupt interrupt pseudocode",
+			sizeof(vub300->vub_name));
+		return;
+	}
+	ts += *data++;
+	size -= 1;
+	ts <<= 8;
+	ts += *data++;
+	size -= 1;
+	if (ts < size) {
+		u16 xfer_length = roundup_to_multiple_of_64(ts);
+		u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
+		if (xfer_buffer) {
+			int retval;
+			memcpy(xfer_buffer, data, ts);
+			memset(xfer_buffer + ts, 0,
+			       xfer_length - ts);
+			size -= ts;
+			data += ts;
+			retval =
+				usb_control_msg(vub300->udev,
+						usb_sndctrlpipe(vub300->udev, 0),
+						SET_TRANSFER_PSEUDOCODE,
+						USB_DIR_OUT | USB_TYPE_VENDOR |
+						USB_RECIP_DEVICE, 0x0000, 0x0000,
+						xfer_buffer, xfer_length, HZ);
+			kfree(xfer_buffer);
+			if (retval < 0) {
+				strncpy(vub300->vub_name,
+					"SDIO pseudocode download failed",
+					sizeof(vub300->vub_name));
+				return;
+			}
+		} else {
+			dev_err(&vub300->udev->dev,
+				"not enough memory for xfer buffer to send"
+				" TRANSFER_PSEUDOCODE for %s %s\n", fw->data,
+				vub300->vub_name);
+			strncpy(vub300->vub_name,
+				"SDIO transfer pseudocode download failed",
+				sizeof(vub300->vub_name));
+			return;
+		}
+	} else {
+		dev_err(&vub300->udev->dev,
+			"corrupt transfer pseudocode in firmware %s %s\n",
+			fw->data, vub300->vub_name);
+		strncpy(vub300->vub_name, "corrupt transfer pseudocode",
+			sizeof(vub300->vub_name));
+		return;
+	}
+	register_count += *data++;
+	size -= 1;
+	if (register_count * 4 == size) {
+		int I = vub300->dynamic_register_count = register_count;
+		int i = 0;
+		while (I--) {
+			unsigned int func_num = 0;
+			vub300->sdio_register[i].func_num = *data++;
+			size -= 1;
+			func_num += *data++;
+			size -= 1;
+			func_num <<= 8;
+			func_num += *data++;
+			size -= 1;
+			func_num <<= 8;
+			func_num += *data++;
+			size -= 1;
+			vub300->sdio_register[i].sdio_reg = func_num;
+			vub300->sdio_register[i].activate = 1;
+			vub300->sdio_register[i].prepared = 0;
+			i += 1;
+		}
+		dev_info(&vub300->udev->dev,
+			 "initialized %d dynamic pseudocode registers\n",
+			 vub300->dynamic_register_count);
+		return;
+	} else {
+		dev_err(&vub300->udev->dev,
+			"corrupt dynamic registers in firmware %s\n",
+			vub300->vub_name);
+		strncpy(vub300->vub_name, "corrupt dynamic registers",
+			sizeof(vub300->vub_name));
+		return;
+	}
+}
+
+/*
+ * if the binary containing the EMPTY PseudoCode can not be found
+ * vub300->vub_name is set anyway in order to prevent an automatic retry
+ */
+static void download_offload_pseudocode(struct vub300_mmc_host *vub300)
+{
+	struct mmc_card *card = vub300->mmc->card;
+	int sdio_funcs = card->sdio_funcs;
+	const struct firmware *fw = NULL;
+	int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name),
+			 "vub_%04X%04X", card->cis.vendor, card->cis.device);
+	int n = 0;
+	int retval;
+	for (n = 0; n < sdio_funcs; n++) {
+		struct sdio_func *sf = card->sdio_func[n];
+		l += snprintf(vub300->vub_name + l,
+			      sizeof(vub300->vub_name) - l, "_%04X%04X",
+			      sf->vendor, sf->device);
+	};
+	snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin");
+	dev_info(&vub300->udev->dev, "requesting offload firmware %s\n",
+		 vub300->vub_name);
+	retval = request_firmware(&fw, vub300->vub_name, &card->dev);
+	if (retval < 0) {
+		strncpy(vub300->vub_name, "vub_default.bin",
+			sizeof(vub300->vub_name));
+		retval = request_firmware(&fw, vub300->vub_name, &card->dev);
+		if (retval < 0) {
+			strncpy(vub300->vub_name,
+				"no SDIO offload firmware found",
+				sizeof(vub300->vub_name));
+		} else {
+			__download_offload_pseudocode(vub300, fw);
+			release_firmware(fw);
+		}
+	} else {
+		__download_offload_pseudocode(vub300, fw);
+		release_firmware(fw);
+	}
+}
+
+static void vub300_usb_bulk_msg_completion(struct urb *urb)
+{				/* urb completion handler - hardirq */
+	complete((struct completion *)urb->context);
+}
+
+static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300,
+			       unsigned int pipe, void *data, int len,
+			       int *actual_length, int timeout_msecs)
+{
+	/* cmd_mutex is held by vub300_cmndwork_thread */
+	struct usb_device *usb_dev = vub300->udev;
+	struct completion done;
+	int retval;
+	vub300->urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!vub300->urb)
+		return -ENOMEM;
+	usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len,
+			  vub300_usb_bulk_msg_completion, NULL);
+	init_completion(&done);
+	vub300->urb->context = &done;
+	vub300->urb->actual_length = 0;
+	retval = usb_submit_urb(vub300->urb, GFP_KERNEL);
+	if (unlikely(retval))
+		goto out;
+	if (!wait_for_completion_timeout
+	    (&done, msecs_to_jiffies(timeout_msecs))) {
+		retval = -ETIMEDOUT;
+		usb_kill_urb(vub300->urb);
+	} else {
+		retval = vub300->urb->status;
+	}
+out:
+	*actual_length = vub300->urb->actual_length;
+	usb_free_urb(vub300->urb);
+	vub300->urb = NULL;
+	return retval;
+}
+
+static int __command_read_data(struct vub300_mmc_host *vub300,
+			       struct mmc_command *cmd, struct mmc_data *data)
+{
+	/* cmd_mutex is held by vub300_cmndwork_thread */
+	int linear_length = vub300->datasize;
+	int padded_length = vub300->large_usb_packets ?
+		((511 + linear_length) >> 9) << 9 :
+		((63 + linear_length) >> 6) << 6;
+	if ((padded_length == linear_length) || !pad_input_to_usb_pkt) {
+		int result;
+		unsigned pipe;
+		pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep);
+		result = usb_sg_init(&vub300->sg_request, vub300->udev,
+				     pipe, 0, data->sg,
+				     data->sg_len, 0, GFP_KERNEL);
+		if (result < 0) {
+			usb_unlink_urb(vub300->command_out_urb);
+			usb_unlink_urb(vub300->command_res_urb);
+			cmd->error = result;
+			data->bytes_xfered = 0;
+			return 0;
+		} else {
+			vub300->sg_transfer_timer.expires =
+				jiffies + msecs_to_jiffies(2000 +
+						  (linear_length / 16384));
+			add_timer(&vub300->sg_transfer_timer);
+			usb_sg_wait(&vub300->sg_request);
+			del_timer(&vub300->sg_transfer_timer);
+			if (vub300->sg_request.status < 0) {
+				cmd->error = vub300->sg_request.status;
+				data->bytes_xfered = 0;
+				return 0;
+			} else {
+				data->bytes_xfered = vub300->datasize;
+				return linear_length;
+			}
+		}
+	} else {
+		u8 *buf = kmalloc(padded_length, GFP_KERNEL);
+		if (buf) {
+			int result;
+			unsigned pipe = usb_rcvbulkpipe(vub300->udev,
+							vub300->data_inp_ep);
+			int actual_length = 0;
+			result = vub300_usb_bulk_msg(vub300, pipe, buf,
+					     padded_length, &actual_length,
+					     2000 + (padded_length / 16384));
+			if (result < 0) {
+				cmd->error = result;
+				data->bytes_xfered = 0;
+				kfree(buf);
+				return 0;
+			} else if (actual_length < linear_length) {
+				cmd->error = -EREMOTEIO;
+				data->bytes_xfered = 0;
+				kfree(buf);
+				return 0;
+			} else {
+				sg_copy_from_buffer(data->sg, data->sg_len, buf,
+						    linear_length);
+				kfree(buf);
+				data->bytes_xfered = vub300->datasize;
+				return linear_length;
+			}
+		} else {
+			cmd->error = -ENOMEM;
+			data->bytes_xfered = 0;
+			return 0;
+		}
+	}
+}
+
+static int __command_write_data(struct vub300_mmc_host *vub300,
+				struct mmc_command *cmd, struct mmc_data *data)
+{
+	/* cmd_mutex is held by vub300_cmndwork_thread */
+	unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep);
+	int linear_length = vub300->datasize;
+	int modulo_64_length = linear_length & 0x003F;
+	int modulo_512_length = linear_length & 0x01FF;
+	if (linear_length < 64) {
+		int result;
+		int actual_length;
+		sg_copy_to_buffer(data->sg, data->sg_len,
+				  vub300->padded_buffer,
+				  sizeof(vub300->padded_buffer));
+		memset(vub300->padded_buffer + linear_length, 0,
+		       sizeof(vub300->padded_buffer) - linear_length);
+		result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer,
+					     sizeof(vub300->padded_buffer),
+					     &actual_length, 2000 +
+					     (sizeof(vub300->padded_buffer) /
+					      16384));
+		if (result < 0) {
+			cmd->error = result;
+			data->bytes_xfered = 0;
+		} else {
+			data->bytes_xfered = vub300->datasize;
+		}
+	} else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) ||
+		    (vub300->large_usb_packets && (64 > modulo_512_length))
+		) {		/* don't you just love these work-rounds */
+		int padded_length = ((63 + linear_length) >> 6) << 6;
+		u8 *buf = kmalloc(padded_length, GFP_KERNEL);
+		if (buf) {
+			int result;
+			int actual_length;
+			sg_copy_to_buffer(data->sg, data->sg_len, buf,
+					  padded_length);
+			memset(buf + linear_length, 0,
+			       padded_length - linear_length);
+			result =
+				vub300_usb_bulk_msg(vub300, pipe, buf,
+						    padded_length, &actual_length,
+						    2000 + padded_length / 16384);
+			kfree(buf);
+			if (result < 0) {
+				cmd->error = result;
+				data->bytes_xfered = 0;
+			} else {
+				data->bytes_xfered = vub300->datasize;
+			}
+		} else {
+			cmd->error = -ENOMEM;
+			data->bytes_xfered = 0;
+		}
+	} else {		/* no data padding required */
+		int result;
+		unsigned char buf[64 * 4];
+		sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf));
+		result = usb_sg_init(&vub300->sg_request, vub300->udev,
+				     pipe, 0, data->sg,
+				     data->sg_len, 0, GFP_KERNEL);
+		if (result < 0) {
+			usb_unlink_urb(vub300->command_out_urb);
+			usb_unlink_urb(vub300->command_res_urb);
+			cmd->error = result;
+			data->bytes_xfered = 0;
+		} else {
+			vub300->sg_transfer_timer.expires =
+				jiffies + msecs_to_jiffies(2000 +
+							   linear_length / 16384);
+			add_timer(&vub300->sg_transfer_timer);
+			usb_sg_wait(&vub300->sg_request);
+			if (cmd->error) {
+				data->bytes_xfered = 0;
+			} else {
+				del_timer(&vub300->sg_transfer_timer);
+				if (vub300->sg_request.status < 0) {
+					cmd->error = vub300->sg_request.status;
+					data->bytes_xfered = 0;
+				} else {
+					data->bytes_xfered = vub300->datasize;
+				}
+			}
+		}
+	}
+	return linear_length;
+}
+
+static void __vub300_command_response(struct vub300_mmc_host *vub300,
+				      struct mmc_command *cmd,
+				      struct mmc_data *data, int data_length)
+{
+	/* cmd_mutex is held by vub300_cmndwork_thread */
+	long respretval;
+	int msec_timeout = 1000 + data_length / 4;
+	respretval =
+		wait_for_completion_timeout(&vub300->command_complete,
+					    msecs_to_jiffies(msec_timeout));
+	if (respretval == 0) { /* TIMED OUT */
+		/* we don't know which of "out" and "res" if any failed */
+		int result;
+		vub300->usb_timed_out = 1;
+		usb_kill_urb(vub300->command_out_urb);
+		usb_kill_urb(vub300->command_res_urb);
+		cmd->error = -ETIMEDOUT;
+		result = usb_lock_device_for_reset(vub300->udev,
+						   vub300->interface);
+		if (result == 0) {
+			result = usb_reset_device(vub300->udev);
+			usb_unlock_device(vub300->udev);
+		}
+	} else if (respretval < 0) {
+		/* we don't know which of "out" and "res" if any failed */
+		usb_kill_urb(vub300->command_out_urb);
+		usb_kill_urb(vub300->command_res_urb);
+		cmd->error = respretval;
+	} else if (cmd->error) {
+		/*
+		 * the error occured sending the command
+		 * or recieving the response
+		 */
+	} else if (vub300->command_out_urb->status) {
+		vub300->usb_transport_fail = vub300->command_out_urb->status;
+		cmd->error = -EPROTO == vub300->command_out_urb->status ?
+			-ESHUTDOWN : vub300->command_out_urb->status;
+	} else if (vub300->command_res_urb->status) {
+		vub300->usb_transport_fail = vub300->command_res_urb->status;
+		cmd->error = -EPROTO == vub300->command_res_urb->status ?
+			-ESHUTDOWN : vub300->command_res_urb->status;
+	} else if (vub300->resp.common.header_type == 0x00) {
+		/*
+		 * the command completed successfully
+		 * and there was no piggybacked data
+		 */
+	} else if (vub300->resp.common.header_type == RESPONSE_ERROR) {
+		cmd->error =
+			vub300_response_error(vub300->resp.error.error_code);
+		if (vub300->data)
+			usb_sg_cancel(&vub300->sg_request);
+	} else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) {
+		int offloaded_data_length =
+			vub300->resp.common.header_size -
+			sizeof(struct sd_register_header);
+		int register_count = offloaded_data_length >> 3;
+		int ri = 0;
+		while (register_count--) {
+			add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
+			ri += 1;
+		}
+		vub300->resp.common.header_size =
+			sizeof(struct sd_register_header);
+		vub300->resp.common.header_type = 0x00;
+		cmd->error = 0;
+	} else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) {
+		int offloaded_data_length =
+			vub300->resp.common.header_size -
+			sizeof(struct sd_register_header);
+		int register_count = offloaded_data_length >> 3;
+		int ri = 0;
+		while (register_count--) {
+			add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
+			ri += 1;
+		}
+		mutex_lock(&vub300->irq_mutex);
+		if (vub300->irqs_queued) {
+			vub300->irqs_queued += 1;
+		} else if (vub300->irq_enabled) {
+			vub300->irqs_queued += 1;
+			vub300_queue_poll_work(vub300, 0);
+		} else {
+			vub300->irqs_queued += 1;
+		}
+		vub300->irq_disabled = 1;
+		mutex_unlock(&vub300->irq_mutex);
+		vub300->resp.common.header_size =
+			sizeof(struct sd_register_header);
+		vub300->resp.common.header_type = 0x00;
+		cmd->error = 0;
+	} else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) {
+		int offloaded_data_length =
+			vub300->resp.common.header_size -
+			sizeof(struct sd_register_header);
+		int register_count = offloaded_data_length >> 3;
+		int ri = 0;
+		while (register_count--) {
+			add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
+			ri += 1;
+		}
+		mutex_lock(&vub300->irq_mutex);
+		if (vub300->irqs_queued) {
+			vub300->irqs_queued += 1;
+		} else if (vub300->irq_enabled) {
+			vub300->irqs_queued += 1;
+			vub300_queue_poll_work(vub300, 0);
+		} else {
+			vub300->irqs_queued += 1;
+		}
+		vub300->irq_disabled = 0;
+		mutex_unlock(&vub300->irq_mutex);
+		vub300->resp.common.header_size =
+			sizeof(struct sd_register_header);
+		vub300->resp.common.header_type = 0x00;
+		cmd->error = 0;
+	} else {
+		cmd->error = -EINVAL;
+	}
+}
+
+static void construct_request_response(struct vub300_mmc_host *vub300,
+				       struct mmc_command *cmd)
+{
+	int resp_len = vub300->resp_len;
+	int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1;
+	int bytes = 3 & less_cmd;
+	int words = less_cmd >> 2;
+	u8 *r = vub300->resp.response.command_response;
+	if (bytes == 3) {
+		cmd->resp[words] = (r[1 + (words << 2)] << 24)
+			| (r[2 + (words << 2)] << 16)
+			| (r[3 + (words << 2)] << 8);
+	} else if (bytes == 2) {
+		cmd->resp[words] = (r[1 + (words << 2)] << 24)
+			| (r[2 + (words << 2)] << 16);
+	} else if (bytes == 1) {
+		cmd->resp[words] = (r[1 + (words << 2)] << 24);
+	}
+	while (words-- > 0) {
+		cmd->resp[words] = (r[1 + (words << 2)] << 24)
+			| (r[2 + (words << 2)] << 16)
+			| (r[3 + (words << 2)] << 8)
+			| (r[4 + (words << 2)] << 0);
+	}
+	if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0]))
+		cmd->resp[0] &= 0xFFFFFF00;
+}
+
+/* this thread runs only when there is an upper level command req outstanding */
+static void vub300_cmndwork_thread(struct work_struct *work)
+{
+	struct vub300_mmc_host *vub300 =
+		container_of(work, struct vub300_mmc_host, cmndwork);
+	if (!vub300->interface) {
+		kref_put(&vub300->kref, vub300_delete);
+		return;
+	} else {
+		struct mmc_request *req = vub300->req;
+		struct mmc_command *cmd = vub300->cmd;
+		struct mmc_data *data = vub300->data;
+		int data_length;
+		mutex_lock(&vub300->cmd_mutex);
+		init_completion(&vub300->command_complete);
+		if (likely(vub300->vub_name[0]) || !vub300->mmc->card ||
+		    !mmc_card_present(vub300->mmc->card)) {
+			/*
+			 * the name of the EMPTY Pseudo firmware file
+			 * is used as a flag to indicate that the file
+			 * has been already downloaded to the VUB300 chip
+			 */
+		} else if (0 == vub300->mmc->card->sdio_funcs) {
+			strncpy(vub300->vub_name, "SD memory device",
+				sizeof(vub300->vub_name));
+		} else {
+			download_offload_pseudocode(vub300);
+		}
+		send_command(vub300);
+		if (!data)
+			data_length = 0;
+		else if (MMC_DATA_READ & data->flags)
+			data_length = __command_read_data(vub300, cmd, data);
+		else
+			data_length = __command_write_data(vub300, cmd, data);
+		__vub300_command_response(vub300, cmd, data, data_length);
+		vub300->req = NULL;
+		vub300->cmd = NULL;
+		vub300->data = NULL;
+		if (cmd->error) {
+			if (cmd->error == -ENOMEDIUM)
+				check_vub300_port_status(vub300);
+			mutex_unlock(&vub300->cmd_mutex);
+			mmc_request_done(vub300->mmc, req);
+			kref_put(&vub300->kref, vub300_delete);
+			return;
+		} else {
+			construct_request_response(vub300, cmd);
+			vub300->resp_len = 0;
+			mutex_unlock(&vub300->cmd_mutex);
+			kref_put(&vub300->kref, vub300_delete);
+			mmc_request_done(vub300->mmc, req);
+			return;
+		}
+	}
+}
+
+static int examine_cyclic_buffer(struct vub300_mmc_host *vub300,
+				 struct mmc_command *cmd, u8 Function)
+{
+	/* cmd_mutex is held by vub300_mmc_request */
+	u8 cmd0 = 0xFF & (cmd->arg >> 24);
+	u8 cmd1 = 0xFF & (cmd->arg >> 16);
+	u8 cmd2 = 0xFF & (cmd->arg >> 8);
+	u8 cmd3 = 0xFF & (cmd->arg >> 0);
+	int first = MAXREGMASK & vub300->fn[Function].offload_point;
+	struct offload_registers_access *rf = &vub300->fn[Function].reg[first];
+	if (cmd0 == rf->command_byte[0] &&
+	    cmd1 == rf->command_byte[1] &&
+	    cmd2 == rf->command_byte[2] &&
+	    cmd3 == rf->command_byte[3]) {
+		u8 checksum = 0x00;
+		cmd->resp[1] = checksum << 24;
+		cmd->resp[0] = (rf->Respond_Byte[0] << 24)
+			| (rf->Respond_Byte[1] << 16)
+			| (rf->Respond_Byte[2] << 8)
+			| (rf->Respond_Byte[3] << 0);
+		vub300->fn[Function].offload_point += 1;
+		vub300->fn[Function].offload_count -= 1;
+		vub300->total_offload_count -= 1;
+		return 1;
+	} else {
+		int delta = 1;	/* because it does not match the first one */
+		u8 register_count = vub300->fn[Function].offload_count - 1;
+		u32 register_point = vub300->fn[Function].offload_point + 1;
+		while (0 < register_count) {
+			int point = MAXREGMASK & register_point;
+			struct offload_registers_access *r =
+				&vub300->fn[Function].reg[point];
+			if (cmd0 == r->command_byte[0] &&
+			    cmd1 == r->command_byte[1] &&
+			    cmd2 == r->command_byte[2] &&
+			    cmd3 == r->command_byte[3]) {
+				u8 checksum = 0x00;
+				cmd->resp[1] = checksum << 24;
+				cmd->resp[0] = (r->Respond_Byte[0] << 24)
+					| (r->Respond_Byte[1] << 16)
+					| (r->Respond_Byte[2] << 8)
+					| (r->Respond_Byte[3] << 0);
+				vub300->fn[Function].offload_point += delta;
+				vub300->fn[Function].offload_count -= delta;
+				vub300->total_offload_count -= delta;
+				return 1;
+			} else {
+				register_point += 1;
+				register_count -= 1;
+				delta += 1;
+				continue;
+			}
+		}
+		return 0;
+	}
+}
+
+static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300,
+					       struct mmc_command *cmd)
+{
+	/* cmd_mutex is held by vub300_mmc_request */
+	u8 regs = vub300->dynamic_register_count;
+	u8 i = 0;
+	u8 func = FUN(cmd);
+	u32 reg = REG(cmd);
+	while (0 < regs--) {
+		if ((vub300->sdio_register[i].func_num == func) &&
+		    (vub300->sdio_register[i].sdio_reg == reg)) {
+			if (!vub300->sdio_register[i].prepared) {
+				return 0;
+			} else if ((0x80000000 & cmd->arg) == 0x80000000) {
+				/*
+				 * a write to a dynamic register
+				 * nullifies our offloaded value
+				 */
+				vub300->sdio_register[i].prepared = 0;
+				return 0;
+			} else {
+				u8 checksum = 0x00;
+				u8 rsp0 = 0x00;
+				u8 rsp1 = 0x00;
+				u8 rsp2 = vub300->sdio_register[i].response;
+				u8 rsp3 = vub300->sdio_register[i].regvalue;
+				vub300->sdio_register[i].prepared = 0;
+				cmd->resp[1] = checksum << 24;
+				cmd->resp[0] = (rsp0 << 24)
+					| (rsp1 << 16)
+					| (rsp2 << 8)
+					| (rsp3 << 0);
+				return 1;
+			}
+		} else {
+			i += 1;
+			continue;
+		}
+	};
+	if (vub300->total_offload_count == 0)
+		return 0;
+	else if (vub300->fn[func].offload_count == 0)
+		return 0;
+	else
+		return examine_cyclic_buffer(vub300, cmd, func);
+}
+
+static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
+{				/* NOT irq */
+	struct mmc_command *cmd = req->cmd;
+	struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+	if (!vub300->interface) {
+		cmd->error = -ESHUTDOWN;
+		mmc_request_done(mmc, req);
+		return;
+	} else {
+		struct mmc_data *data = req->data;
+		if (!vub300->card_powered) {
+			cmd->error = -ENOMEDIUM;
+			mmc_request_done(mmc, req);
+			return;
+		}
+		if (!vub300->card_present) {
+			cmd->error = -ENOMEDIUM;
+			mmc_request_done(mmc, req);
+			return;
+		}
+		if (vub300->usb_transport_fail) {
+			cmd->error = vub300->usb_transport_fail;
+			mmc_request_done(mmc, req);
+			return;
+		}
+		if (!vub300->interface) {
+			cmd->error = -ENODEV;
+			mmc_request_done(mmc, req);
+			return;
+		}
+		kref_get(&vub300->kref);
+		mutex_lock(&vub300->cmd_mutex);
+		mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+		/*
+		 * for performance we have to return immediately
+		 * if the requested data has been offloaded
+		 */
+		if (cmd->opcode == 52 &&
+		    satisfy_request_from_offloaded_data(vub300, cmd)) {
+			cmd->error = 0;
+			mutex_unlock(&vub300->cmd_mutex);
+			kref_put(&vub300->kref, vub300_delete);
+			mmc_request_done(mmc, req);
+			return;
+		} else {
+			vub300->cmd = cmd;
+			vub300->req = req;
+			vub300->data = data;
+			if (data)
+				vub300->datasize = data->blksz * data->blocks;
+			else
+				vub300->datasize = 0;
+			vub300_queue_cmnd_work(vub300);
+			mutex_unlock(&vub300->cmd_mutex);
+			kref_put(&vub300->kref, vub300_delete);
+			/*
+			 * the kernel lock diagnostics complain
+			 * if the cmd_mutex * is "passed on"
+			 * to the cmndwork thread,
+			 * so we must release it now
+			 * and re-acquire it in the cmndwork thread
+			 */
+		}
+	}
+}
+
+static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8],
+			      struct mmc_ios *ios)
+{
+	int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */
+	int retval;
+	u32 kHzClock;
+	if (ios->clock >= 48000000)
+		kHzClock = 48000;
+	else if (ios->clock >= 24000000)
+		kHzClock = 24000;
+	else if (ios->clock >= 20000000)
+		kHzClock = 20000;
+	else if (ios->clock >= 15000000)
+		kHzClock = 15000;
+	else if (ios->clock >= 200000)
+		kHzClock = 200;
+	else
+		kHzClock = 0;
+	{
+		int i;
+		u64 c = kHzClock;
+		for (i = 0; i < buf_array_size; i++) {
+			buf[i] = c;
+			c >>= 8;
+		}
+	}
+	retval =
+		usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
+				SET_CLOCK_SPEED,
+				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				0x00, 0x00, buf, buf_array_size, HZ);
+	if (retval != 8) {
+		dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED"
+			" %dkHz failed with retval=%d\n", kHzClock, retval);
+	} else {
+		dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED"
+			" %dkHz\n", kHzClock);
+	}
+}
+
+static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+	if (!vub300->interface)
+		return;
+	kref_get(&vub300->kref);
+	mutex_lock(&vub300->cmd_mutex);
+	if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) {
+		vub300->card_powered = 0;
+		usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
+				SET_SD_POWER,
+				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				0x0000, 0x0000, NULL, 0, HZ);
+		/* must wait for the VUB300 u-proc to boot up */
+		msleep(600);
+	} else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) {
+		usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
+				SET_SD_POWER,
+				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				0x0001, 0x0000, NULL, 0, HZ);
+		msleep(600);
+		vub300->card_powered = 1;
+	} else if (ios->power_mode == MMC_POWER_ON) {
+		u8 *buf = kmalloc(8, GFP_KERNEL);
+		if (buf) {
+			__set_clock_speed(vub300, buf, ios);
+			kfree(buf);
+		}
+	} else {
+		/* this should mean no change of state */
+	}
+	mutex_unlock(&vub300->cmd_mutex);
+	kref_put(&vub300->kref, vub300_delete);
+}
+
+static int vub300_mmc_get_ro(struct mmc_host *mmc)
+{
+	struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+	return vub300->read_only;
+}
+
+static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+	if (!vub300->interface)
+		return;
+	kref_get(&vub300->kref);
+	if (enable) {
+		mutex_lock(&vub300->irq_mutex);
+		if (vub300->irqs_queued) {
+			vub300->irqs_queued -= 1;
+			mmc_signal_sdio_irq(vub300->mmc);
+		} else if (vub300->irq_disabled) {
+			vub300->irq_disabled = 0;
+			vub300->irq_enabled = 1;
+			vub300_queue_poll_work(vub300, 0);
+		} else if (vub300->irq_enabled) {
+			/* this should not happen, so we will just ignore it */
+		} else {
+			vub300->irq_enabled = 1;
+			vub300_queue_poll_work(vub300, 0);
+		}
+		mutex_unlock(&vub300->irq_mutex);
+	} else {
+		vub300->irq_enabled = 0;
+	}
+	kref_put(&vub300->kref, vub300_delete);
+}
+
+void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+	dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n");
+}
+
+static struct mmc_host_ops vub300_mmc_ops = {
+	.request = vub300_mmc_request,
+	.set_ios = vub300_mmc_set_ios,
+	.get_ro = vub300_mmc_get_ro,
+	.enable_sdio_irq = vub300_enable_sdio_irq,
+	.init_card = vub300_init_card,
+};
+
+static int vub300_probe(struct usb_interface *interface,
+			const struct usb_device_id *id)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = NULL;
+	struct usb_host_interface *iface_desc;
+	struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
+	int i;
+	int retval = -ENOMEM;
+	struct urb *command_out_urb;
+	struct urb *command_res_urb;
+	struct mmc_host *mmc;
+	char manufacturer[48];
+	char product[32];
+	char serial_number[32];
+	usb_string(udev, udev->descriptor.iManufacturer, manufacturer,
+		   sizeof(manufacturer));
+	usb_string(udev, udev->descriptor.iProduct, product, sizeof(product));
+	usb_string(udev, udev->descriptor.iSerialNumber, serial_number,
+		   sizeof(serial_number));
+	dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n",
+		 udev->descriptor.idVendor, udev->descriptor.idProduct,
+		 manufacturer, product, serial_number);
+	command_out_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!command_out_urb) {
+		retval = -ENOMEM;
+		dev_err(&vub300->udev->dev,
+			"not enough memory for the command_out_urb\n");
+		goto error0;
+	}
+	command_res_urb = usb_alloc_urb(0, GFP_KERNEL);
+	if (!command_res_urb) {
+		retval = -ENOMEM;
+		dev_err(&vub300->udev->dev,
+			"not enough memory for the command_res_urb\n");
+		goto error1;
+	}
+	/* this also allocates memory for our VUB300 mmc host device */
+	mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev);
+	if (!mmc) {
+		retval = -ENOMEM;
+		dev_err(&vub300->udev->dev,
+			"not enough memory for the mmc_host\n");
+		goto error4;
+	}
+	/* MMC core transfer sizes tunable parameters */
+	mmc->caps = 0;
+	if (!force_1_bit_data_xfers)
+		mmc->caps |= MMC_CAP_4_BIT_DATA;
+	if (!force_polling_for_irqs)
+		mmc->caps |= MMC_CAP_SDIO_IRQ;
+	mmc->caps &= ~MMC_CAP_NEEDS_POLL;
+	/*
+	 * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll
+	 * for devices which results in spurious CMD7's being
+	 * issued which stops some SDIO cards from working
+	 */
+	if (limit_speed_to_24_MHz) {
+		mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
+		mmc->caps |= MMC_CAP_SD_HIGHSPEED;
+		mmc->f_max = 24000000;
+		dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n");
+	} else {
+		mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
+		mmc->caps |= MMC_CAP_SD_HIGHSPEED;
+		mmc->f_max = 48000000;
+	}
+	mmc->f_min = 200000;
+	mmc->max_blk_count = 511;
+	mmc->max_blk_size = 512;
+	mmc->max_segs = 128;
+	if (force_max_req_size)
+		mmc->max_req_size = force_max_req_size * 1024;
+	else
+		mmc->max_req_size = 64 * 1024;
+	mmc->max_seg_size = mmc->max_req_size;
+	mmc->ocr_avail = 0;
+	mmc->ocr_avail |= MMC_VDD_165_195;
+	mmc->ocr_avail |= MMC_VDD_20_21;
+	mmc->ocr_avail |= MMC_VDD_21_22;
+	mmc->ocr_avail |= MMC_VDD_22_23;
+	mmc->ocr_avail |= MMC_VDD_23_24;
+	mmc->ocr_avail |= MMC_VDD_24_25;
+	mmc->ocr_avail |= MMC_VDD_25_26;
+	mmc->ocr_avail |= MMC_VDD_26_27;
+	mmc->ocr_avail |= MMC_VDD_27_28;
+	mmc->ocr_avail |= MMC_VDD_28_29;
+	mmc->ocr_avail |= MMC_VDD_29_30;
+	mmc->ocr_avail |= MMC_VDD_30_31;
+	mmc->ocr_avail |= MMC_VDD_31_32;
+	mmc->ocr_avail |= MMC_VDD_32_33;
+	mmc->ocr_avail |= MMC_VDD_33_34;
+	mmc->ocr_avail |= MMC_VDD_34_35;
+	mmc->ocr_avail |= MMC_VDD_35_36;
+	mmc->ops = &vub300_mmc_ops;
+	vub300 = mmc_priv(mmc);
+	vub300->mmc = mmc;
+	vub300->card_powered = 0;
+	vub300->bus_width = 0;
+	vub300->cmnd.head.block_size[0] = 0x00;
+	vub300->cmnd.head.block_size[1] = 0x00;
+	vub300->app_spec = 0;
+	mutex_init(&vub300->cmd_mutex);
+	mutex_init(&vub300->irq_mutex);
+	vub300->command_out_urb = command_out_urb;
+	vub300->command_res_urb = command_res_urb;
+	vub300->usb_timed_out = 0;
+	vub300->dynamic_register_count = 0;
+
+	for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) {
+		vub300->fn[i].offload_point = 0;
+		vub300->fn[i].offload_count = 0;
+	}
+
+	vub300->total_offload_count = 0;
+	vub300->irq_enabled = 0;
+	vub300->irq_disabled = 0;
+	vub300->irqs_queued = 0;
+
+	for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++)
+		vub300->sdio_register[i++].activate = 0;
+
+	vub300->udev = udev;
+	vub300->interface = interface;
+	vub300->cmnd_res_ep = 0;
+	vub300->cmnd_out_ep = 0;
+	vub300->data_inp_ep = 0;
+	vub300->data_out_ep = 0;
+
+	for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
+		vub300->fbs[i] = 512;
+
+	/*
+	 *      set up the endpoint information
+	 *
+	 * use the first pair of bulk-in and bulk-out
+	 *     endpoints for Command/Response+Interrupt
+	 *
+	 * use the second pair of bulk-in and bulk-out
+	 *     endpoints for Data In/Out
+	 */
+	vub300->large_usb_packets = 0;
+	iface_desc = interface->cur_altsetting;
+	for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+		struct usb_endpoint_descriptor *endpoint =
+			&iface_desc->endpoint[i].desc;
+		dev_info(&vub300->udev->dev,
+			 "vub300 testing %s EndPoint(%d) %02X\n",
+			 usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" :
+			 usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" :
+			 "UNKNOWN", i, endpoint->bEndpointAddress);
+		if (endpoint->wMaxPacketSize > 64)
+			vub300->large_usb_packets = 1;
+		if (usb_endpoint_is_bulk_in(endpoint)) {
+			if (!vub300->cmnd_res_ep) {
+				vub300->cmnd_res_ep =
+					endpoint->bEndpointAddress;
+			} else if (!vub300->data_inp_ep) {
+				vub300->data_inp_ep =
+					endpoint->bEndpointAddress;
+			} else {
+				dev_warn(&vub300->udev->dev,
+					 "ignoring"
+					 " unexpected bulk_in endpoint");
+			}
+		} else if (usb_endpoint_is_bulk_out(endpoint)) {
+			if (!vub300->cmnd_out_ep) {
+				vub300->cmnd_out_ep =
+					endpoint->bEndpointAddress;
+			} else if (!vub300->data_out_ep) {
+				vub300->data_out_ep =
+					endpoint->bEndpointAddress;
+			} else {
+				dev_warn(&vub300->udev->dev,
+					 "ignoring"
+					 " unexpected bulk_out endpoint");
+			}
+		} else {
+			dev_warn(&vub300->udev->dev,
+				 "vub300 ignoring EndPoint(%d) %02X", i,
+				 endpoint->bEndpointAddress);
+		}
+	}
+	if (vub300->cmnd_res_ep && vub300->cmnd_out_ep &&
+	    vub300->data_inp_ep && vub300->data_out_ep) {
+		dev_info(&vub300->udev->dev,
+			 "vub300 %s packets"
+			 " using EndPoints %02X %02X %02X %02X\n",
+			 vub300->large_usb_packets ? "LARGE" : "SMALL",
+			 vub300->cmnd_out_ep, vub300->cmnd_res_ep,
+			 vub300->data_out_ep, vub300->data_inp_ep);
+		/* we have the expected EndPoints */
+	} else {
+		dev_err(&vub300->udev->dev,
+		    "Could not find two sets of bulk-in/out endpoint pairs\n");
+		retval = -EINVAL;
+		goto error5;
+	}
+	retval =
+		usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+				GET_HC_INF0,
+				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				0x0000, 0x0000, &vub300->hc_info,
+				sizeof(vub300->hc_info), HZ);
+	if (retval < 0)
+		goto error5;
+	retval =
+		usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+				SET_ROM_WAIT_STATES,
+				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				firmware_rom_wait_states, 0x0000, NULL, 0, HZ);
+	if (retval < 0)
+		goto error5;
+	dev_info(&vub300->udev->dev,
+		 "operating_mode = %s %s %d MHz %s %d byte USB packets\n",
+		 (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL",
+		 (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit",
+		 mmc->f_max / 1000000,
+		 pad_input_to_usb_pkt ? "padding input data to" : "with",
+		 vub300->large_usb_packets ? 512 : 64);
+	retval =
+		usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+				GET_SYSTEM_PORT_STATUS,
+				USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+				0x0000, 0x0000, &vub300->system_port_status,
+				sizeof(vub300->system_port_status), HZ);
+	if (retval < 0) {
+		goto error4;
+	} else if (sizeof(vub300->system_port_status) == retval) {
+		vub300->card_present =
+			(0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
+		vub300->read_only =
+			(0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
+	} else {
+		goto error4;
+	}
+	usb_set_intfdata(interface, vub300);
+	INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread);
+	INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread);
+	INIT_WORK(&vub300->deadwork, vub300_deadwork_thread);
+	kref_init(&vub300->kref);
+	init_timer(&vub300->sg_transfer_timer);
+	vub300->sg_transfer_timer.data = (unsigned long)vub300;
+	vub300->sg_transfer_timer.function = vub300_sg_timed_out;
+	kref_get(&vub300->kref);
+	init_timer(&vub300->inactivity_timer);
+	vub300->inactivity_timer.data = (unsigned long)vub300;
+	vub300->inactivity_timer.function = vub300_inactivity_timer_expired;
+	vub300->inactivity_timer.expires = jiffies + HZ;
+	add_timer(&vub300->inactivity_timer);
+	if (vub300->card_present)
+		dev_info(&vub300->udev->dev,
+			 "USB vub300 remote SDIO host controller[%d]"
+			 "connected with SD/SDIO card inserted\n",
+			 interface_to_InterfaceNumber(interface));
+	else
+		dev_info(&vub300->udev->dev,
+			 "USB vub300 remote SDIO host controller[%d]"
+			 "connected with no SD/SDIO card inserted\n",
+			 interface_to_InterfaceNumber(interface));
+	mmc_add_host(mmc);
+	return 0;
+error5:
+	mmc_free_host(mmc);
+	/*
+	 * and hence also frees vub300
+	 * which is contained at the end of struct mmc
+	 */
+error4:
+	usb_free_urb(command_out_urb);
+error1:
+	usb_free_urb(command_res_urb);
+error0:
+	return retval;
+}
+
+static void vub300_disconnect(struct usb_interface *interface)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = usb_get_intfdata(interface);
+	if (!vub300 || !vub300->mmc) {
+		return;
+	} else {
+		struct mmc_host *mmc = vub300->mmc;
+		if (!vub300->mmc) {
+			return;
+		} else {
+			int ifnum = interface_to_InterfaceNumber(interface);
+			usb_set_intfdata(interface, NULL);
+			/* prevent more I/O from starting */
+			vub300->interface = NULL;
+			kref_put(&vub300->kref, vub300_delete);
+			mmc_remove_host(mmc);
+			pr_info("USB vub300 remote SDIO host controller[%d]"
+				" now disconnected", ifnum);
+			return;
+		}
+	}
+}
+
+#ifdef CONFIG_PM
+static int vub300_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+	if (!vub300 || !vub300->mmc) {
+		return 0;
+	} else {
+		struct mmc_host *mmc = vub300->mmc;
+		mmc_suspend_host(mmc);
+		return 0;
+	}
+}
+
+static int vub300_resume(struct usb_interface *intf)
+{
+	struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+	if (!vub300 || !vub300->mmc) {
+		return 0;
+	} else {
+		struct mmc_host *mmc = vub300->mmc;
+		mmc_resume_host(mmc);
+		return 0;
+	}
+}
+#else
+#define vub300_suspend NULL
+#define vub300_resume NULL
+#endif
+static int vub300_pre_reset(struct usb_interface *intf)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+	mutex_lock(&vub300->cmd_mutex);
+	return 0;
+}
+
+static int vub300_post_reset(struct usb_interface *intf)
+{				/* NOT irq */
+	struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+	/* we are sure no URBs are active - no locking needed */
+	vub300->errors = -EPIPE;
+	mutex_unlock(&vub300->cmd_mutex);
+	return 0;
+}
+
+static struct usb_driver vub300_driver = {
+	.name = "vub300",
+	.probe = vub300_probe,
+	.disconnect = vub300_disconnect,
+	.suspend = vub300_suspend,
+	.resume = vub300_resume,
+	.pre_reset = vub300_pre_reset,
+	.post_reset = vub300_post_reset,
+	.id_table = vub300_table,
+	.supports_autosuspend = 1,
+};
+
+static int __init vub300_init(void)
+{				/* NOT irq */
+	int result;
+
+	pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X",
+		firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout);
+	cmndworkqueue = create_singlethread_workqueue("kvub300c");
+	if (!cmndworkqueue) {
+		pr_err("not enough memory for the REQUEST workqueue");
+		result = -ENOMEM;
+		goto out1;
+	}
+	pollworkqueue = create_singlethread_workqueue("kvub300p");
+	if (!pollworkqueue) {
+		pr_err("not enough memory for the IRQPOLL workqueue");
+		result = -ENOMEM;
+		goto out2;
+	}
+	deadworkqueue = create_singlethread_workqueue("kvub300d");
+	if (!deadworkqueue) {
+		pr_err("not enough memory for the EXPIRED workqueue");
+		result = -ENOMEM;
+		goto out3;
+	}
+	result = usb_register(&vub300_driver);
+	if (result) {
+		pr_err("usb_register failed. Error number %d", result);
+		goto out4;
+	}
+	return 0;
+out4:
+	destroy_workqueue(deadworkqueue);
+out3:
+	destroy_workqueue(pollworkqueue);
+out2:
+	destroy_workqueue(cmndworkqueue);
+out1:
+	return result;
+}
+
+static void __exit vub300_exit(void)
+{
+	usb_deregister(&vub300_driver);
+	flush_workqueue(cmndworkqueue);
+	flush_workqueue(pollworkqueue);
+	flush_workqueue(deadworkqueue);
+	destroy_workqueue(cmndworkqueue);
+	destroy_workqueue(pollworkqueue);
+	destroy_workqueue(deadworkqueue);
+}
+
+module_init(vub300_init);
+module_exit(vub300_exit);
+
+MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>");
+MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver");
+MODULE_LICENSE("GPL");