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
  ...

14 files changed, 764 insertions, 258 deletions

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