Merge branch 'android-3.0' into imx_3.0.15_android

Conflicts:
	drivers/misc/Kconfig
	drivers/misc/Makefile
	drivers/net/wireless/Makefile
	kernel/power/main.c
	sound/soc/soc-core.c

11 files changed, 625 insertions, 118 deletions

diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig
index 3b1f783bf924..ebb4afe6c702 100644
--- a/drivers/mmc/card/Kconfig
+++ b/drivers/mmc/card/Kconfig
@@ -50,6 +50,15 @@ config MMC_BLOCK_BOUNCE
 
 	  If unsure, say Y here.
 
+config MMC_BLOCK_DEFERRED_RESUME
+	bool "Deferr MMC layer resume until I/O is requested"
+	depends on MMC_BLOCK
+	default n
+	help
+	  Say Y here to enable deferred MMC resume until I/O
+	  is requested. This will reduce overall resume latency and
+	  save power when theres an SD card inserted but not being used.
+
 config SDIO_UART
 	tristate "SDIO UART/GPS class support"
 	help
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index f85e42224559..625bd9e46d70 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -126,11 +126,7 @@ static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
 
 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;
+	int devidx = disk->first_minor / perdev_minors;
 	return devidx;
 }
 
@@ -525,7 +521,20 @@ static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
 	return result;
 }
 
-static u32 get_card_status(struct mmc_card *card, struct request *req)
+static int send_stop(struct mmc_card *card, u32 *status)
+{
+	struct mmc_command cmd = {0};
+	int err;
+
+	cmd.opcode = MMC_STOP_TRANSMISSION;
+	cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
+	err = mmc_wait_for_cmd(card->host, &cmd, 5);
+	if (err == 0)
+		*status = cmd.resp[0];
+	return err;
+}
+
+static int get_card_status(struct mmc_card *card, u32 *status, int retries)
 {
 	struct mmc_command cmd = {0};
 	int err;
@@ -534,11 +543,145 @@ static u32 get_card_status(struct mmc_card *card, struct request *req)
 	if (!mmc_host_is_spi(card->host))
 		cmd.arg = card->rca << 16;
 	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
-	err = mmc_wait_for_cmd(card->host, &cmd, 0);
+	err = mmc_wait_for_cmd(card->host, &cmd, retries);
+	if (err == 0)
+		*status = cmd.resp[0];
+	return err;
+}
+
+#define ERR_RETRY	2
+#define ERR_ABORT	1
+#define ERR_CONTINUE	0
+
+static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
+	bool status_valid, u32 status)
+{
+	switch (error) {
+	case -EILSEQ:
+		/* response crc error, retry the r/w cmd */
+		pr_err("%s: %s sending %s command, card status %#x\n",
+			req->rq_disk->disk_name, "response CRC error",
+			name, status);
+		return ERR_RETRY;
+
+	case -ETIMEDOUT:
+		pr_err("%s: %s sending %s command, card status %#x\n",
+			req->rq_disk->disk_name, "timed out", name, status);
+
+		/* If the status cmd initially failed, retry the r/w cmd */
+		if (!status_valid) {
+			pr_err("%s: status not valid, retrying timeout\n", req->rq_disk->disk_name);
+			return ERR_RETRY;
+		}
+		/*
+		 * If it was a r/w cmd crc error, or illegal command
+		 * (eg, issued in wrong state) then retry - we should
+		 * have corrected the state problem above.
+		 */
+		if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
+			pr_err("%s: command error, retrying timeout\n", req->rq_disk->disk_name);
+			return ERR_RETRY;
+		}
+
+		/* Otherwise abort the command */
+		pr_err("%s: not retrying timeout\n", req->rq_disk->disk_name);
+		return ERR_ABORT;
+
+	default:
+		/* We don't understand the error code the driver gave us */
+		pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
+		       req->rq_disk->disk_name, error, status);
+		return ERR_ABORT;
+	}
+}
+
+/*
+ * Initial r/w and stop cmd error recovery.
+ * We don't know whether the card received the r/w cmd or not, so try to
+ * restore things back to a sane state.  Essentially, we do this as follows:
+ * - Obtain card status.  If the first attempt to obtain card status fails,
+ *   the status word will reflect the failed status cmd, not the failed
+ *   r/w cmd.  If we fail to obtain card status, it suggests we can no
+ *   longer communicate with the card.
+ * - Check the card state.  If the card received the cmd but there was a
+ *   transient problem with the response, it might still be in a data transfer
+ *   mode.  Try to send it a stop command.  If this fails, we can't recover.
+ * - If the r/w cmd failed due to a response CRC error, it was probably
+ *   transient, so retry the cmd.
+ * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
+ * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
+ *   illegal cmd, retry.
+ * Otherwise we don't understand what happened, so abort.
+ */
+static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
+	struct mmc_blk_request *brq)
+{
+	bool prev_cmd_status_valid = true;
+	u32 status, stop_status = 0;
+	int err, retry;
+
+	/*
+	 * Try to get card status which indicates both the card state
+	 * and why there was no response.  If the first attempt fails,
+	 * we can't be sure the returned status is for the r/w command.
+	 */
+	for (retry = 2; retry >= 0; retry--) {
+		err = get_card_status(card, &status, 0);
+		if (!err)
+			break;
+
+		prev_cmd_status_valid = false;
+		pr_err("%s: error %d sending status command, %sing\n",
+		       req->rq_disk->disk_name, err, retry ? "retry" : "abort");
+	}
+
+	/* We couldn't get a response from the card.  Give up. */
 	if (err)
-		printk(KERN_ERR "%s: error %d sending status command",
-		       req->rq_disk->disk_name, err);
-	return cmd.resp[0];
+		return ERR_ABORT;
+
+	/*
+	 * Check the current card state.  If it is in some data transfer
+	 * mode, tell it to stop (and hopefully transition back to TRAN.)
+	 */
+	if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
+	    R1_CURRENT_STATE(status) == R1_STATE_RCV) {
+		err = send_stop(card, &stop_status);
+		if (err)
+			pr_err("%s: error %d sending stop command\n",
+			       req->rq_disk->disk_name, err);
+
+		/*
+		 * If the stop cmd also timed out, the card is probably
+		 * not present, so abort.  Other errors are bad news too.
+		 */
+		if (err)
+			return ERR_ABORT;
+	}
+
+	/* Check for set block count errors */
+	if (brq->sbc.error)
+		return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
+				prev_cmd_status_valid, status);
+
+	/* Check for r/w command errors */
+	if (brq->cmd.error)
+		return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
+				prev_cmd_status_valid, status);
+
+	/* Now for stop errors.  These aren't fatal to the transfer. */
+	pr_err("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
+	       req->rq_disk->disk_name, brq->stop.error,
+	       brq->cmd.resp[0], status);
+
+	/*
+	 * Subsitute in our own stop status as this will give the error
+	 * state which happened during the execution of the r/w command.
+	 */
+	if (stop_status) {
+		brq->stop.resp[0] = stop_status;
+		brq->stop.error = 0;
+	}
+	return ERR_CONTINUE;
 }
 
 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
@@ -669,12 +812,20 @@ static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
 	}
 }
 
+#define CMD_ERRORS							\
+	(R1_OUT_OF_RANGE |	/* Command argument out of range */	\
+	 R1_ADDRESS_ERROR |	/* Misaligned address */		\
+	 R1_BLOCK_LEN_ERROR |	/* Transferred block length incorrect */\
+	 R1_WP_VIOLATION |	/* Tried to write to protected block */	\
+	 R1_CC_ERROR |		/* Card controller error */		\
+	 R1_ERROR)		/* General/unknown error */
+
 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 {
 	struct mmc_blk_data *md = mq->data;
 	struct mmc_card *card = md->queue.card;
 	struct mmc_blk_request brq;
-	int ret = 1, disable_multi = 0;
+	int ret = 1, disable_multi = 0, retry = 0;
 
 	/*
 	 * Reliable writes are used to implement Forced Unit Access and
@@ -686,8 +837,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		(md->flags & MMC_BLK_REL_WR);
 
 	do {
-		struct mmc_command cmd = {0};
-		u32 readcmd, writecmd, status = 0;
+		u32 readcmd, writecmd;
 
 		memset(&brq, 0, sizeof(struct mmc_blk_request));
 		brq.mrq.cmd = &brq.cmd;
@@ -804,62 +954,47 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		mmc_queue_bounce_post(mq);
 
 		/*
-		 * Check for errors here, but don't jump to cmd_err
-		 * until later as we need to wait for the card to leave
-		 * programming mode even when things go wrong.
+		 * sbc.error indicates a problem with the set block count
+		 * command.  No data will have been transferred.
+		 *
+		 * cmd.error indicates a problem with the r/w command.  No
+		 * data will have been transferred.
+		 *
+		 * stop.error indicates a problem with the stop command.  Data
+		 * may have been transferred, or may still be transferring.
 		 */
-		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 "
-				       "block read\n", req->rq_disk->disk_name);
-				disable_multi = 1;
-				continue;
+		if (brq.sbc.error || brq.cmd.error || brq.stop.error) {
+			switch (mmc_blk_cmd_recovery(card, req, &brq)) {
+			case ERR_RETRY:
+				if (retry++ < 5)
+					continue;
+			case ERR_ABORT:
+				goto cmd_abort;
+			case ERR_CONTINUE:
+				break;
 			}
-			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",
-			       req->rq_disk->disk_name, brq.cmd.error,
-			       brq.cmd.resp[0], status);
 		}
 
-		if (brq.data.error) {
-			if (brq.data.error == -ETIMEDOUT && brq.mrq.stop)
-				/* 'Stop' response contains card status */
-				status = brq.mrq.stop->resp[0];
-			printk(KERN_ERR "%s: error %d transferring data,"
-			       " sector %u, nr %u, card status %#x\n",
-			       req->rq_disk->disk_name, brq.data.error,
-			       (unsigned)blk_rq_pos(req),
-			       (unsigned)blk_rq_sectors(req), status);
-		}
-
-		if (brq.stop.error) {
-			printk(KERN_ERR "%s: error %d sending stop command, "
-			       "response %#x, card status %#x\n",
-			       req->rq_disk->disk_name, brq.stop.error,
-			       brq.stop.resp[0], status);
+		/*
+		 * Check for errors relating to the execution of the
+		 * initial command - such as address errors.  No data
+		 * has been transferred.
+		 */
+		if (brq.cmd.resp[0] & CMD_ERRORS) {
+			pr_err("%s: r/w command failed, status = %#x\n",
+				req->rq_disk->disk_name, brq.cmd.resp[0]);
+			goto cmd_abort;
 		}
 
+		/*
+		 * Everything else is either success, or a data error of some
+		 * kind.  If it was a write, we may have transitioned to
+		 * program mode, which we have to wait for it to complete.
+		 */
 		if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
+			u32 status;
 			do {
-				int err;
-
-				cmd.opcode = MMC_SEND_STATUS;
-				cmd.arg = card->rca << 16;
-				cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-				err = mmc_wait_for_cmd(card->host, &cmd, 5);
+				int err = get_card_status(card, &status, 5);
 				if (err) {
 					printk(KERN_ERR "%s: error %d requesting status\n",
 					       req->rq_disk->disk_name, err);
@@ -870,20 +1005,26 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 				 * so make sure to check both the busy
 				 * indication and the card state.
 				 */
-			} while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
-				(R1_CURRENT_STATE(cmd.resp[0]) == 7));
-
-#if 0
-			if (cmd.resp[0] & ~0x00000900)
-				printk(KERN_ERR "%s: status = %08x\n",
-				       req->rq_disk->disk_name, cmd.resp[0]);
-			if (mmc_decode_status(cmd.resp))
-				goto cmd_err;
-#endif
+			} while (!(status & R1_READY_FOR_DATA) ||
+				 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
 		}
 
-		if (brq.cmd.error || brq.stop.error || brq.data.error) {
+		if (brq.data.error) {
+			pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
+				req->rq_disk->disk_name, brq.data.error,
+				(unsigned)blk_rq_pos(req),
+				(unsigned)blk_rq_sectors(req),
+				brq.cmd.resp[0], brq.stop.resp[0]);
+
 			if (rq_data_dir(req) == READ) {
+				if (brq.data.blocks > 1) {
+					/* Redo read one sector at a time */
+					pr_warning("%s: retrying using single block read\n",
+						req->rq_disk->disk_name);
+					disable_multi = 1;
+					continue;
+				}
+
 				/*
 				 * After an error, we redo I/O one sector at a
 				 * time, so we only reach here after trying to
@@ -893,8 +1034,9 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 				ret = __blk_end_request(req, -EIO, brq.data.blksz);
 				spin_unlock_irq(&md->lock);
 				continue;
+			} else {
+				goto cmd_err;
 			}
-			goto cmd_err;
 		}
 
 		/*
@@ -931,6 +1073,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 		spin_unlock_irq(&md->lock);
 	}
 
+ cmd_abort:
 	spin_lock_irq(&md->lock);
 	while (ret)
 		ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req));
@@ -939,12 +1082,22 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req)
 	return 0;
 }
 
+static int
+mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card);
+
 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;
 
+#ifdef CONFIG_MMC_BLOCK_DEFERRED_RESUME
+	if (mmc_bus_needs_resume(card->host)) {
+		mmc_resume_bus(card->host);
+		mmc_blk_set_blksize(md, card);
+	}
+#endif
+
 	mmc_claim_host(card->host);
 	ret = mmc_blk_part_switch(card, md);
 	if (ret) {
@@ -1038,6 +1191,7 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	md->disk->queue = md->queue.queue;
 	md->disk->driverfs_dev = parent;
 	set_disk_ro(md->disk, md->read_only || default_ro);
+	md->disk->flags = GENHD_FL_EXT_DEVT;
 
 	/*
 	 * As discussed on lkml, GENHD_FL_REMOVABLE should:
@@ -1277,6 +1431,9 @@ static int mmc_blk_probe(struct mmc_card *card)
 	mmc_set_drvdata(card, md);
 	mmc_fixup_device(card, blk_fixups);
 
+#ifdef CONFIG_MMC_BLOCK_DEFERRED_RESUME
+	mmc_set_bus_resume_policy(card->host, 1);
+#endif
 	if (mmc_add_disk(md))
 		goto out;
 
@@ -1302,6 +1459,9 @@ static void mmc_blk_remove(struct mmc_card *card)
 	mmc_release_host(card->host);
 	mmc_blk_remove_req(md);
 	mmc_set_drvdata(card, NULL);
+#ifdef CONFIG_MMC_BLOCK_DEFERRED_RESUME
+	mmc_set_bus_resume_policy(card->host, 0);
+#endif
 }
 
 #ifdef CONFIG_PM
@@ -1325,7 +1485,9 @@ static int mmc_blk_resume(struct mmc_card *card)
 	struct mmc_blk_data *md = mmc_get_drvdata(card);
 
 	if (md) {
+#ifndef CONFIG_MMC_BLOCK_DEFERRED_RESUME
 		mmc_blk_set_blksize(md, card);
+#endif
 
 		/*
 		 * Resume involves the card going into idle state,
diff --git a/drivers/mmc/core/Kconfig b/drivers/mmc/core/Kconfig
index ef103871517f..85c2e1acd156 100644
--- a/drivers/mmc/core/Kconfig
+++ b/drivers/mmc/core/Kconfig
@@ -27,3 +27,20 @@ config MMC_CLKGATE
 	  support handling this in order for it to be of any use.
 
 	  If unsure, say N.
+
+config MMC_EMBEDDED_SDIO
+	boolean "MMC embedded SDIO device support (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  If you say Y here, support will be added for embedded SDIO
+	  devices which do not contain the necessary enumeration
+	  support in hardware to be properly detected.
+
+config MMC_PARANOID_SD_INIT
+	bool "Enable paranoid SD card initialization (EXPERIMENTAL)"
+	depends on EXPERIMENTAL
+	help
+	  If you say Y here, the MMC layer will be extra paranoid
+	  about re-trying SD init requests. This can be a useful
+	  work-around for buggy controllers and hardware. Enable
+	  if you are experiencing issues with SD detection.
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 393d817ed040..e07d6c90caec 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -120,18 +120,19 @@ static int mmc_bus_remove(struct device *dev)
 	return 0;
 }
 
-static int mmc_bus_suspend(struct device *dev, pm_message_t state)
+static int mmc_bus_pm_suspend(struct device *dev)
 {
 	struct mmc_driver *drv = to_mmc_driver(dev->driver);
 	struct mmc_card *card = mmc_dev_to_card(dev);
 	int ret = 0;
+	pm_message_t state = { PM_EVENT_SUSPEND };
 
 	if (dev->driver && drv->suspend)
 		ret = drv->suspend(card, state);
 	return ret;
 }
 
-static int mmc_bus_resume(struct device *dev)
+static int mmc_bus_pm_resume(struct device *dev)
 {
 	struct mmc_driver *drv = to_mmc_driver(dev->driver);
 	struct mmc_card *card = mmc_dev_to_card(dev);
@@ -143,7 +144,6 @@ static int mmc_bus_resume(struct device *dev)
 }
 
 #ifdef CONFIG_PM_RUNTIME
-
 static int mmc_runtime_suspend(struct device *dev)
 {
 	struct mmc_card *card = mmc_dev_to_card(dev);
@@ -162,21 +162,13 @@ static int mmc_runtime_idle(struct device *dev)
 {
 	return pm_runtime_suspend(dev);
 }
+#endif /* CONFIG_PM_RUNTIME */
 
 static const struct dev_pm_ops mmc_bus_pm_ops = {
-	.runtime_suspend	= mmc_runtime_suspend,
-	.runtime_resume		= mmc_runtime_resume,
-	.runtime_idle		= mmc_runtime_idle,
+	SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_pm_suspend, mmc_bus_pm_resume)
+	SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume, mmc_runtime_idle)
 };
 
-#define MMC_PM_OPS_PTR	(&mmc_bus_pm_ops)
-
-#else /* !CONFIG_PM_RUNTIME */
-
-#define MMC_PM_OPS_PTR	NULL
-
-#endif /* !CONFIG_PM_RUNTIME */
-
 static struct bus_type mmc_bus_type = {
 	.name		= "mmc",
 	.dev_attrs	= mmc_dev_attrs,
@@ -184,9 +176,7 @@ static struct bus_type mmc_bus_type = {
 	.uevent		= mmc_bus_uevent,
 	.probe		= mmc_bus_probe,
 	.remove		= mmc_bus_remove,
-	.suspend	= mmc_bus_suspend,
-	.resume		= mmc_bus_resume,
-	.pm		= MMC_PM_OPS_PTR,
+	.pm		= &mmc_bus_pm_ops,
 };
 
 int mmc_register_bus(void)
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index fb541cc8a92c..b7f9345065c4 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -23,6 +23,7 @@
 #include <linux/log2.h>
 #include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
+#include <linux/wakelock.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
@@ -1133,6 +1134,36 @@ static inline void mmc_bus_put(struct mmc_host *host)
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
+int mmc_resume_bus(struct mmc_host *host)
+{
+	unsigned long flags;
+
+	if (!mmc_bus_needs_resume(host))
+		return -EINVAL;
+
+	printk("%s: Starting deferred resume\n", mmc_hostname(host));
+	spin_lock_irqsave(&host->lock, flags);
+	host->bus_resume_flags &= ~MMC_BUSRESUME_NEEDS_RESUME;
+	host->rescan_disable = 0;
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	mmc_bus_get(host);
+	if (host->bus_ops && !host->bus_dead) {
+		mmc_power_up(host);
+		BUG_ON(!host->bus_ops->resume);
+		host->bus_ops->resume(host);
+	}
+
+	if (host->bus_ops->detect && !host->bus_dead)
+		host->bus_ops->detect(host);
+
+	mmc_bus_put(host);
+	printk("%s: Deferred resume completed\n", mmc_hostname(host));
+	return 0;
+}
+
+EXPORT_SYMBOL(mmc_resume_bus);
+
 /*
  * Assign a mmc bus handler to a host. Only one bus handler may control a
  * host at any given time.
@@ -1198,6 +1229,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay)
 	spin_unlock_irqrestore(&host->lock, flags);
 #endif
 
+	wake_lock(&host->detect_wake_lock);
 	mmc_schedule_delayed_work(&host->detect, delay);
 }
 
@@ -1604,6 +1636,7 @@ void mmc_rescan(struct work_struct *work)
 	struct mmc_host *host =
 		container_of(work, struct mmc_host, detect.work);
 	int i;
+	bool extend_wakelock = false;
 
 	if (host->rescan_disable)
 		return;
@@ -1618,6 +1651,12 @@ void mmc_rescan(struct work_struct *work)
 	    && !(host->caps & MMC_CAP_NONREMOVABLE))
 		host->bus_ops->detect(host);
 
+	/* If the card was removed the bus will be marked
+	 * as dead - extend the wakelock so userspace
+	 * can respond */
+	if (host->bus_dead)
+		extend_wakelock = 1;
+
 	/*
 	 * Let mmc_bus_put() free the bus/bus_ops if we've found that
 	 * the card is no longer present.
@@ -1642,16 +1681,24 @@ void mmc_rescan(struct work_struct *work)
 
 	mmc_claim_host(host);
 	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
-		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
+		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min))) {
+			extend_wakelock = true;
 			break;
+		}
 		if (freqs[i] <= host->f_min)
 			break;
 	}
 	mmc_release_host(host);
 
  out:
-	if (host->caps & MMC_CAP_NEEDS_POLL)
+	if (extend_wakelock)
+		wake_lock_timeout(&host->detect_wake_lock, HZ / 2);
+	else
+		wake_unlock(&host->detect_wake_lock);
+	if (host->caps & MMC_CAP_NEEDS_POLL) {
+		wake_lock(&host->detect_wake_lock);
 		mmc_schedule_delayed_work(&host->detect, HZ);
+	}
 }
 
 void mmc_start_host(struct mmc_host *host)
@@ -1671,7 +1718,8 @@ void mmc_stop_host(struct mmc_host *host)
 
 	if (host->caps & MMC_CAP_DISABLE)
 		cancel_delayed_work(&host->disable);
-	cancel_delayed_work_sync(&host->detect);
+	if (cancel_delayed_work_sync(&host->detect))
+		wake_unlock(&host->detect_wake_lock);
 	mmc_flush_scheduled_work();
 
 	/* clear pm flags now and let card drivers set them as needed */
@@ -1788,9 +1836,13 @@ int mmc_suspend_host(struct mmc_host *host)
 {
 	int err = 0;
 
+	if (mmc_bus_needs_resume(host))
+		return 0;
+
 	if (host->caps & MMC_CAP_DISABLE)
 		cancel_delayed_work(&host->disable);
-	cancel_delayed_work(&host->detect);
+	if (cancel_delayed_work(&host->detect))
+		wake_unlock(&host->detect_wake_lock);
 	mmc_flush_scheduled_work();
 
 	mmc_bus_get(host);
@@ -1831,6 +1883,12 @@ int mmc_resume_host(struct mmc_host *host)
 	int err = 0;
 
 	mmc_bus_get(host);
+	if (mmc_bus_manual_resume(host)) {
+		host->bus_resume_flags |= MMC_BUSRESUME_NEEDS_RESUME;
+		mmc_bus_put(host);
+		return 0;
+	}
+
 	if (host->bus_ops && !host->bus_dead) {
 		if (!mmc_card_keep_power(host)) {
 			mmc_power_up(host);
@@ -1881,9 +1939,14 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 	case PM_SUSPEND_PREPARE:
 
 		spin_lock_irqsave(&host->lock, flags);
+		if (mmc_bus_needs_resume(host)) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			break;
+		}
 		host->rescan_disable = 1;
 		spin_unlock_irqrestore(&host->lock, flags);
-		cancel_delayed_work_sync(&host->detect);
+		if (cancel_delayed_work_sync(&host->detect))
+			wake_unlock(&host->detect_wake_lock);
 
 		if (!host->bus_ops || host->bus_ops->suspend)
 			break;
@@ -1904,6 +1967,10 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 	case PM_POST_RESTORE:
 
 		spin_lock_irqsave(&host->lock, flags);
+		if (mmc_bus_manual_resume(host)) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			break;
+		}
 		host->rescan_disable = 0;
 		spin_unlock_irqrestore(&host->lock, flags);
 		mmc_detect_change(host, 0);
@@ -1914,6 +1981,22 @@ int mmc_pm_notify(struct notifier_block *notify_block,
 }
 #endif
 
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+void mmc_set_embedded_sdio_data(struct mmc_host *host,
+				struct sdio_cis *cis,
+				struct sdio_cccr *cccr,
+				struct sdio_embedded_func *funcs,
+				int num_funcs)
+{
+	host->embedded_sdio_data.cis = cis;
+	host->embedded_sdio_data.cccr = cccr;
+	host->embedded_sdio_data.funcs = funcs;
+	host->embedded_sdio_data.num_funcs = num_funcs;
+}
+
+EXPORT_SYMBOL(mmc_set_embedded_sdio_data);
+#endif
+
 static int __init mmc_init(void)
 {
 	int ret;
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 793d0a0dad8d..e09f0a7eb652 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -284,6 +284,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 
 	spin_lock_init(&host->lock);
 	init_waitqueue_head(&host->wq);
+	wake_lock_init(&host->detect_wake_lock, WAKE_LOCK_SUSPEND,
+		kasprintf(GFP_KERNEL, "%s_detect", mmc_hostname(host)));
 	INIT_DELAYED_WORK(&host->detect, mmc_rescan);
 	INIT_DELAYED_WORK_DEFERRABLE(&host->disable, mmc_host_deeper_disable);
 #ifdef CONFIG_PM
@@ -336,7 +338,8 @@ int mmc_add_host(struct mmc_host *host)
 #endif
 
 	mmc_start_host(host);
-	register_pm_notifier(&host->pm_notify);
+	if (!(host->pm_flags & MMC_PM_IGNORE_PM_NOTIFY))
+		register_pm_notifier(&host->pm_notify);
 
 	return 0;
 }
@@ -353,7 +356,9 @@ EXPORT_SYMBOL(mmc_add_host);
  */
 void mmc_remove_host(struct mmc_host *host)
 {
-	unregister_pm_notifier(&host->pm_notify);
+	if (!(host->pm_flags & MMC_PM_IGNORE_PM_NOTIFY))
+		unregister_pm_notifier(&host->pm_notify);
+
 	mmc_stop_host(host);
 
 #ifdef CONFIG_DEBUG_FS
@@ -380,6 +385,7 @@ void mmc_free_host(struct mmc_host *host)
 	spin_lock(&mmc_host_lock);
 	idr_remove(&mmc_host_idr, host->index);
 	spin_unlock(&mmc_host_lock);
+	wake_lock_destroy(&host->detect_wake_lock);
 
 	put_device(&host->class_dev);
 }
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index bd8805c9e8af..0635da51a970 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -764,6 +764,9 @@ int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
 	bool reinit)
 {
 	int err;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	int retries;
+#endif
 
 	if (!reinit) {
 		/*
@@ -790,7 +793,26 @@ int mmc_sd_setup_card(struct mmc_host *host, struct mmc_card *card,
 		/*
 		 * Fetch switch information from card.
 		 */
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+		for (retries = 1; retries <= 3; retries++) {
+			err = mmc_read_switch(card);
+			if (!err) {
+				if (retries > 1) {
+					printk(KERN_WARNING
+					       "%s: recovered\n", 
+					       mmc_hostname(host));
+				}
+				break;
+			} else {
+				printk(KERN_WARNING
+				       "%s: read switch failed (attempt %d)\n",
+				       mmc_hostname(host), retries);
+			}
+		}
+#else
 		err = mmc_read_switch(card);
+#endif
+
 		if (err)
 			return err;
 	}
@@ -989,18 +1011,36 @@ static void mmc_sd_remove(struct mmc_host *host)
  */
 static void mmc_sd_detect(struct mmc_host *host)
 {
-	int err;
+	int err = 0;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+        int retries = 5;
+#endif
 
 	BUG_ON(!host);
 	BUG_ON(!host->card);
-
+       
 	mmc_claim_host(host);
 
 	/*
 	 * Just check if our card has been removed.
 	 */
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	while(retries) {
+		err = mmc_send_status(host->card, NULL);
+		if (err) {
+			retries--;
+			udelay(5);
+			continue;
+		}
+		break;
+	}
+	if (!retries) {
+		printk(KERN_ERR "%s(%s): Unable to re-detect card (%d)\n",
+		       __func__, mmc_hostname(host), err);
+	}
+#else
 	err = mmc_send_status(host->card, NULL);
-
+#endif
 	mmc_release_host(host);
 
 	if (err) {
@@ -1039,12 +1079,31 @@ static int mmc_sd_suspend(struct mmc_host *host)
 static int mmc_sd_resume(struct mmc_host *host)
 {
 	int err;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	int retries;
+#endif
 
 	BUG_ON(!host);
 	BUG_ON(!host->card);
 
 	mmc_claim_host(host);
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	retries = 5;
+	while (retries) {
+		err = mmc_sd_init_card(host, host->ocr, host->card);
+
+		if (err) {
+			printk(KERN_ERR "%s: Re-init card rc = %d (retries = %d)\n",
+			       mmc_hostname(host), err, retries);
+			mdelay(5);
+			retries--;
+			continue;
+		}
+		break;
+	}
+#else
 	err = mmc_sd_init_card(host, host->ocr, host->card);
+#endif
 	mmc_release_host(host);
 
 	return err;
@@ -1096,6 +1155,9 @@ int mmc_attach_sd(struct mmc_host *host)
 {
 	int err;
 	u32 ocr;
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	int retries;
+#endif
 
 	BUG_ON(!host);
 	WARN_ON(!host->claimed);
@@ -1160,9 +1222,27 @@ int mmc_attach_sd(struct mmc_host *host)
 	/*
 	 * Detect and init the card.
 	 */
+#ifdef CONFIG_MMC_PARANOID_SD_INIT
+	retries = 5;
+	while (retries) {
+		err = mmc_sd_init_card(host, host->ocr, NULL);
+		if (err) {
+			retries--;
+			continue;
+		}
+		break;
+	}
+
+	if (!retries) {
+		printk(KERN_ERR "%s: mmc_sd_init_card() failure (err = %d)\n",
+		       mmc_hostname(host), err);
+		goto err;
+	}
+#else
 	err = mmc_sd_init_card(host, host->ocr, NULL);
 	if (err)
 		goto err;
+#endif
 
 	mmc_release_host(host);
 	err = mmc_add_card(host->card);
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index ac492ac974e1..a2c1c4d83718 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -27,6 +27,10 @@
 #include "sdio_ops.h"
 #include "sdio_cis.h"
 
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+#include <linux/mmc/sdio_ids.h>
+#endif
+
 static int sdio_read_fbr(struct sdio_func *func)
 {
 	int ret;
@@ -449,19 +453,35 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
 		goto finish;
 	}
 
-	/*
-	 * Read the common registers.
-	 */
-	err = sdio_read_cccr(card);
-	if (err)
-		goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	if (host->embedded_sdio_data.cccr)
+		memcpy(&card->cccr, host->embedded_sdio_data.cccr, sizeof(struct sdio_cccr));
+	else {
+#endif
+		/*
+		 * Read the common registers.
+		 */
+		err = sdio_read_cccr(card);
+		if (err)
+			goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	}
+#endif
 
-	/*
-	 * Read the common CIS tuples.
-	 */
-	err = sdio_read_common_cis(card);
-	if (err)
-		goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	if (host->embedded_sdio_data.cis)
+		memcpy(&card->cis, host->embedded_sdio_data.cis, sizeof(struct sdio_cis));
+	else {
+#endif
+		/*
+		 * Read the common CIS tuples.
+		 */
+		err = sdio_read_common_cis(card);
+		if (err)
+			goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	}
+#endif
 
 	if (oldcard) {
 		int same = (card->cis.vendor == oldcard->cis.vendor &&
@@ -827,14 +847,36 @@ int mmc_attach_sdio(struct mmc_host *host)
 	funcs = (ocr & 0x70000000) >> 28;
 	card->sdio_funcs = 0;
 
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	if (host->embedded_sdio_data.funcs)
+		card->sdio_funcs = funcs = host->embedded_sdio_data.num_funcs;
+#endif
+
 	/*
 	 * Initialize (but don't add) all present functions.
 	 */
 	for (i = 0; i < funcs; i++, card->sdio_funcs++) {
-		err = sdio_init_func(host->card, i + 1);
-		if (err)
-			goto remove;
-
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+		if (host->embedded_sdio_data.funcs) {
+			struct sdio_func *tmp;
+
+			tmp = sdio_alloc_func(host->card);
+			if (IS_ERR(tmp))
+				goto remove;
+			tmp->num = (i + 1);
+			card->sdio_func[i] = tmp;
+			tmp->class = host->embedded_sdio_data.funcs[i].f_class;
+			tmp->max_blksize = host->embedded_sdio_data.funcs[i].f_maxblksize;
+			tmp->vendor = card->cis.vendor;
+			tmp->device = card->cis.device;
+		} else {
+#endif
+			err = sdio_init_func(host->card, i + 1);
+			if (err)
+				goto remove;
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+		}
+#endif
 		/*
 		 * Enable Runtime PM for this func (if supported)
 		 */
@@ -882,3 +924,77 @@ err:
 	return err;
 }
 
+int sdio_reset_comm(struct mmc_card *card)
+{
+	struct mmc_host *host = card->host;
+	u32 ocr;
+	int err;
+
+	printk("%s():\n", __func__);
+	mmc_claim_host(host);
+
+	mmc_go_idle(host);
+
+	mmc_set_clock(host, host->f_min);
+
+	err = mmc_send_io_op_cond(host, 0, &ocr);
+	if (err)
+		goto err;
+
+	host->ocr = mmc_select_voltage(host, ocr);
+	if (!host->ocr) {
+		err = -EINVAL;
+		goto err;
+	}
+
+	err = mmc_send_io_op_cond(host, host->ocr, &ocr);
+	if (err)
+		goto err;
+
+	if (mmc_host_is_spi(host)) {
+		err = mmc_spi_set_crc(host, use_spi_crc);
+		if (err)
+			goto err;
+	}
+
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_send_relative_addr(host, &card->rca);
+		if (err)
+			goto err;
+		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+	}
+	if (!mmc_host_is_spi(host)) {
+		err = mmc_select_card(card);
+		if (err)
+			goto err;
+	}
+
+	/*
+	 * Switch to high-speed (if supported).
+	 */
+	err = sdio_enable_hs(card);
+	if (err > 0)
+		mmc_sd_go_highspeed(card);
+	else if (err)
+		goto err;
+
+	/*
+	 * Change to the card's maximum speed.
+	 */
+	mmc_set_clock(host, mmc_sdio_get_max_clock(card));
+
+	err = sdio_enable_4bit_bus(card);
+	if (err > 0)
+		mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+	else if (err)
+		goto err;
+
+	mmc_release_host(host);
+	return 0;
+err:
+	printk("%s: Error resetting SDIO communications (%d)\n",
+	       mmc_hostname(host), err);
+	mmc_release_host(host);
+	return err;
+}
+EXPORT_SYMBOL(sdio_reset_comm);
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index d2565df8a7fb..52429a98201b 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -23,6 +23,10 @@
 #include "sdio_cis.h"
 #include "sdio_bus.h"
 
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+#include <linux/mmc/host.h>
+#endif
+
 /* show configuration fields */
 #define sdio_config_attr(field, format_string)				\
 static ssize_t								\
@@ -260,7 +264,14 @@ static void sdio_release_func(struct device *dev)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
 
-	sdio_free_func_cis(func);
+#ifdef CONFIG_MMC_EMBEDDED_SDIO
+	/*
+	 * If this device is embedded then we never allocated
+	 * cis tables for this func
+	 */
+	if (!func->card->host->embedded_sdio_data.funcs)
+#endif
+		sdio_free_func_cis(func);
 
 	if (func->info)
 		kfree(func->info);
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c
index 0f687cdeb064..549a34144646 100644..100755
--- a/drivers/mmc/core/sdio_io.c
+++ b/drivers/mmc/core/sdio_io.c
@@ -383,6 +383,39 @@ u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret)
 EXPORT_SYMBOL_GPL(sdio_readb);
 
 /**
+ *	sdio_readb_ext - read a single byte from a SDIO function
+ *	@func: SDIO function to access
+ *	@addr: address to read
+ *	@err_ret: optional status value from transfer
+ *	@in: value to add to argument
+ *
+ *	Reads a single byte from the address space of a given SDIO
+ *	function. If there is a problem reading the address, 0xff
+ *	is returned and @err_ret will contain the error code.
+ */
+unsigned char sdio_readb_ext(struct sdio_func *func, unsigned int addr,
+	int *err_ret, unsigned in)
+{
+	int ret;
+	unsigned char val;
+
+	BUG_ON(!func);
+
+	if (err_ret)
+		*err_ret = 0;
+
+	ret = mmc_io_rw_direct(func->card, 0, func->num, addr, (u8)in, &val);
+	if (ret) {
+		if (err_ret)
+			*err_ret = ret;
+		return 0xFF;
+	}
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(sdio_readb_ext);
+
+/**
  *	sdio_writeb - write a single byte to a SDIO function
  *	@func: SDIO function to access
  *	@b: byte to write
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 394ddcd0936c..6c3e4006912a 100755
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1090,7 +1090,7 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 	u16 clk = 0;
 	unsigned long timeout;
 
-	if (clock == host->clock)
+	if (clock && clock == host->clock)
 		return;
 
 	if (host->ops->set_clock) {