9 files changed, 38 insertions, 25 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 4e41d5255d72..b087b3bca290 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1310,7 +1310,7 @@ F:	drivers/atm/
 F:      include/linux/atm*
 
 ATMEL AT91 MCI DRIVER
-M:      Nicolas Ferre <nicolas.ferre@atmel.com>
+M:      Ludovic Desroches <ludovic.desroches@atmel.com>
 L:      linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 W:      http://www.atmel.com/products/AT91/
 W:      http://www.at91.com/
@@ -1318,7 +1318,7 @@ S:	Maintained
 F:      drivers/mmc/host/at91_mci.c
 
 ATMEL AT91 / AT32 MCI DRIVER
-M:      Nicolas Ferre <nicolas.ferre@atmel.com>
+M:      Ludovic Desroches <ludovic.desroches@atmel.com>
 S:      Maintained
 F:      drivers/mmc/host/atmel-mci.c
 F:      drivers/mmc/host/atmel-mci-regs.h
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 690255c7d4dc..132378b89d76 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2068,6 +2068,9 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
          */
         mmc_hw_reset_for_init(host);
 
+        /* Initialization should be done at 3.3 V I/O voltage. */
+        mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
         /*
          * sdio_reset sends CMD52 to reset card.  Since we do not know
          * if the card is being re-initialized, just send it.  CMD52
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 30055f2b0d44..c3704e293a7b 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -238,10 +238,10 @@ static inline void mmc_host_clk_init(struct mmc_host *host)
         /* Hold MCI clock for 8 cycles by default */
         host->clk_delay = 8;
         /*
-         * Default clock gating delay is 200ms.
+         * Default clock gating delay is 0ms to avoid wasting power.
          * This value can be tuned by writing into sysfs entry.
          */
-        host->clkgate_delay = 200;
+        host->clkgate_delay = 0;
         host->clk_gated = false;
         INIT_DELAYED_WORK(&host->clk_gate_work, mmc_host_clk_gate_work);
         spin_lock_init(&host->clk_lock);
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index a48066344fa8..2b9ed1401dc4 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -816,6 +816,9 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
         if (!mmc_host_is_spi(host))
                 mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
 
+        /* Initialization should be done at 3.3 V I/O voltage. */
+        mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
         /*
          * Since we're changing the OCR value, we seem to
          * need to tell some cards to go back to the idle
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 5017f9354ce2..c272c6868ecf 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -911,6 +911,9 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
         BUG_ON(!host);
         WARN_ON(!host->claimed);
 
+        /* The initialization should be done at 3.3 V I/O voltage. */
+        mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
         err = mmc_sd_get_cid(host, ocr, cid, &rocr);
         if (err)
                 return err;
@@ -1156,11 +1159,6 @@ 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) {
                 mmc_host_clk_hold(host);
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 12cde6ee17f5..2c7c83f832d2 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -585,6 +585,9 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
          * Inform the card of the voltage
          */
         if (!powered_resume) {
+                /* The initialization should be done at 3.3 V I/O voltage. */
+                mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
                 err = mmc_send_io_op_cond(host, host->ocr, &ocr);
                 if (err)
                         goto err;
@@ -996,6 +999,11 @@ static int mmc_sdio_power_restore(struct mmc_host *host)
          * With these steps taken, mmc_select_voltage() is also required to
          * restore the correct voltage setting of the card.
          */
+
+        /* The initialization should be done at 3.3 V I/O voltage. */
+        if (!mmc_card_keep_power(host))
+                mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
+
         sdio_reset(host);
         mmc_go_idle(host);
         mmc_send_if_cond(host, host->ocr_avail);
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 6985cdb0bb26..e4449a54ae8f 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1948,12 +1948,12 @@ static bool atmci_filter(struct dma_chan *chan, void *slave)
         }
 }
 
-static void atmci_configure_dma(struct atmel_mci *host)
+static bool atmci_configure_dma(struct atmel_mci *host)
 {
         struct mci_platform_data        *pdata;
 
         if (host == NULL)
-                return;
+                return false;
 
         pdata = host->pdev->dev.platform_data;
 
@@ -1970,12 +1970,15 @@ static void atmci_configure_dma(struct atmel_mci *host)
                 host->dma.chan =
                         dma_request_channel(mask, atmci_filter, pdata->dma_slave);
         }
-        if (!host->dma.chan)
-                dev_notice(&host->pdev->dev, "DMA not available, using PIO\n");
-        else
+        if (!host->dma.chan) {
+                dev_warn(&host->pdev->dev, "no DMA channel available\n");
+                return false;
+        } else {
                 dev_info(&host->pdev->dev,
                                         "Using %s for DMA transfers\n",
                                         dma_chan_name(host->dma.chan));
+                return true;
+        }
 }
 
 static inline unsigned int atmci_get_version(struct atmel_mci *host)
@@ -2085,8 +2088,7 @@ static int __init atmci_probe(struct platform_device *pdev)
 
         /* Get MCI capabilities and set operations according to it */
         atmci_get_cap(host);
-        if (host->caps.has_dma) {
-                dev_info(&pdev->dev, "using DMA\n");
+        if (host->caps.has_dma && atmci_configure_dma(host)) {
                 host->prepare_data = &atmci_prepare_data_dma;
                 host->submit_data = &atmci_submit_data_dma;
                 host->stop_transfer = &atmci_stop_transfer_dma;
@@ -2096,15 +2098,12 @@ static int __init atmci_probe(struct platform_device *pdev)
                 host->submit_data = &atmci_submit_data_pdc;
                 host->stop_transfer = &atmci_stop_transfer_pdc;
         } else {
-                dev_info(&pdev->dev, "no DMA, no PDC\n");
+                dev_info(&pdev->dev, "using PIO\n");
                 host->prepare_data = &atmci_prepare_data;
                 host->submit_data = &atmci_submit_data;
                 host->stop_transfer = &atmci_stop_transfer;
         }
 
-        if (host->caps.has_dma)
-                atmci_configure_dma(host);
-
         platform_set_drvdata(pdev, host);
 
         /* We need at least one slot to succeed */
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 0d955ffaf44e..11e589cd8233 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1271,12 +1271,13 @@ static int __devinit mmci_probe(struct amba_device *dev,
         /*
          * Block size can be up to 2048 bytes, but must be a power of two.
          */
-        mmc->max_blk_size = 2048;
+        mmc->max_blk_size = 1 << 11;
 
         /*
-         * No limit on the number of blocks transferred.
+         * Limit the number of blocks transferred so that we don't overflow
+         * the maximum request size.
          */
-        mmc->max_blk_count = mmc->max_req_size;
+        mmc->max_blk_count = mmc->max_req_size >> 11;
 
         spin_lock_init(&host->lock);
 
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index d601e41af282..0be4e2013632 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -269,8 +269,9 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
                 imx_data->scratchpad = val;
                 return;
         case SDHCI_COMMAND:
-                if ((host->cmd->opcode == MMC_STOP_TRANSMISSION)
-                        && (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
+                if ((host->cmd->opcode == MMC_STOP_TRANSMISSION ||
+                     host->cmd->opcode == MMC_SET_BLOCK_COUNT) &&
+                    (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
                         val |= SDHCI_CMD_ABORTCMD;
 
                 if (is_imx6q_usdhc(imx_data)) {