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: (26 commits) mmc: SDHI should depend on SUPERH || ARCH_SHMOBILE mmc: tmio_mmc: Move some defines into a shared header mmc: tmio: support aggressive clock gating mmc: tmio: fix power-mode interpretation mmc: tmio: remove work-around for unmasked SDIO interrupts sh: fix SDHI IO address-range ARM: mach-shmobile: fix SDHI IO address-range mmc: tmio: only access registers above 0xff, if available mfd: remove now redundant sh_mobile_sdhi.h header sh: convert boards to use linux/mmc/sh_mobile_sdhi.h ARM: mach-shmobile: convert boards to use linux/mmc/sh_mobile_sdhi.h mmc: tmio: convert the SDHI MMC driver from MFD to a platform driver sh: ecovec: use the CONFIG_MMC_TMIO symbols instead of MFD mmc: tmio: split core functionality, DMA and MFD glue mmc: tmio: use PIO for short transfers mmc: tmio-mmc: Improve DMA stability on sh-mobile mmc: fix mmc_app_send_scr() for dma transfer mmc: sdhci-esdhc: enable esdhc on imx53 mmc: sdhci-esdhc: use writel/readl as general APIs mmc: sdhci: add the abort CMDTYPE bits definition ...
author: Linus Torvalds 2011-03-29 12:09:30 -0700
committer: Linus Torvalds 2011-03-29 12:09:30 -0700
commit: 6b2a4f7a5b777ea8fcf3bb38a0a33e68a920a9dc (patch)
tree: fcf7d9bddc31974ad046aecd51cc856c68e14cdd /drivers/mmc
parent: eefbab599531240adaffa1d23900afbc8b0342bd (diff)
parent: 022b483596fabb5d1320aa4b76f43a754063f37e (diff)
19 files changed, 1664 insertions, 1293 deletions
diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index 5ec8eddfcf6e..f5cedeccad42 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -1875,7 +1875,7 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
 			     unsigned int tot_sz, int max_scatter)
 {
 	unsigned int dev_addr, i, cnt, sz, ssz;
-	struct timespec ts1, ts2, ts;
+	struct timespec ts1, ts2;
 	int ret;
 
 	sz = test->area.max_tfr;
@@ -1912,7 +1912,6 @@ static int mmc_test_seq_perf(struct mmc_test_card *test, int write,
 	}
 	getnstimeofday(&ts2);
 
-	ts = timespec_sub(ts2, ts1);
 	mmc_test_print_avg_rate(test, sz, cnt, &ts1, &ts2);
 
 	return 0;
diff --git a/drivers/mmc/core/sd_ops.c b/drivers/mmc/core/sd_ops.c
index 797cdb5887fd..76af349c14b4 100644
--- a/drivers/mmc/core/sd_ops.c
+++ b/drivers/mmc/core/sd_ops.c
@@ -9,6 +9,7 @@
  * your option) any later version.
  */
 
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/scatterlist.h>
 
@@ -252,6 +253,7 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	struct mmc_command cmd;
 	struct mmc_data data;
 	struct scatterlist sg;
+	void *data_buf;
 
 	BUG_ON(!card);
 	BUG_ON(!card->host);
@@ -263,6 +265,13 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	if (err)
 		return err;
 
+	/* dma onto stack is unsafe/nonportable, but callers to this
+	 * routine normally provide temporary on-stack buffers ...
+	 */
+	data_buf = kmalloc(sizeof(card->raw_scr), GFP_KERNEL);
+	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));
@@ -280,12 +289,15 @@ int mmc_app_send_scr(struct mmc_card *card, u32 *scr)
 	data.sg = &sg;
 	data.sg_len = 1;
 
-	sg_init_one(&sg, scr, 8);
+	sg_init_one(&sg, data_buf, 8);
 
 	mmc_set_data_timeout(&data, card);
 
 	mmc_wait_for_req(card->host, &mrq);
 
+	memcpy(scr, data_buf, sizeof(card->raw_scr));
+	kfree(data_buf);
+
 	if (cmd.error)
 		return cmd.error;
 	if (data.error)
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 1a21c6427a19..94df40531c38 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -439,13 +439,25 @@ config MMC_SDRICOH_CS
 	  To compile this driver as a module, choose M here: the
 	  module will be called sdricoh_cs.
 
+config MMC_TMIO_CORE
+	tristate
+
 config MMC_TMIO
 	tristate "Toshiba Mobile IO Controller (TMIO) MMC/SD function support"
-	depends on MFD_TMIO || MFD_ASIC3 || MFD_SH_MOBILE_SDHI
+	depends on MFD_TMIO || MFD_ASIC3
+	select MMC_TMIO_CORE
 	help
 	  This provides support for the SD/MMC cell found in TC6393XB,
 	  T7L66XB and also HTC ASIC3
 
+config MMC_SDHI
+	tristate "SH-Mobile SDHI SD/SDIO controller support"
+	depends on SUPERH || ARCH_SHMOBILE
+	select MMC_TMIO_CORE
+	help
+	  This provides support for the SDHI SD/SDIO controller found in
+	  SuperH and ARM SH-Mobile SoCs
+
 config MMC_CB710
 	tristate "ENE CB710 MMC/SD Interface support"
 	depends on PCI
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 30aa6867745f..4f1df0aae574 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -29,7 +29,13 @@ endif
 obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
-obj-$(CONFIG_MMC_CB710)	+= cb710-mmc.o
+obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
+tmio_mmc_core-y			:= tmio_mmc_pio.o
+ifneq ($(CONFIG_MMC_SDHI),n)
+tmio_mmc_core-y			+= tmio_mmc_dma.o
+endif
+obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o
+obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
 obj-$(CONFIG_MMC_DW)		+= dw_mmc.o
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 5a614069cb00..87e1f57ec9ba 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -316,7 +316,7 @@ static void dw_mci_idmac_stop_dma(struct dw_mci *host)
 
 	/* Stop the IDMAC running */
 	temp = mci_readl(host, BMOD);
-	temp &= ~SDMMC_IDMAC_ENABLE;
+	temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);
 	mci_writel(host, BMOD, temp);
 }
 
@@ -385,7 +385,7 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)
 
 	/* Enable the IDMAC */
 	temp = mci_readl(host, BMOD);
-	temp |= SDMMC_IDMAC_ENABLE;
+	temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;
 	mci_writel(host, BMOD, temp);
 
 	/* Start it running */
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 5bbb87d10251..b4a7e4fba90f 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -68,6 +68,12 @@ static struct variant_data variant_arm = {
 	.datalength_bits	= 16,
 };
 
+static struct variant_data variant_arm_extended_fifo = {
+	.fifosize		= 128 * 4,
+	.fifohalfsize		= 64 * 4,
+	.datalength_bits	= 16,
+};
+
 static struct variant_data variant_u300 = {
 	.fifosize		= 16 * 4,
 	.fifohalfsize		= 8 * 4,
@@ -1277,10 +1283,15 @@ static int mmci_resume(struct amba_device *dev)
 static struct amba_id mmci_ids[] = {
 	{
 		.id	= 0x00041180,
-		.mask	= 0x000fffff,
+		.mask	= 0xff0fffff,
 		.data	= &variant_arm,
 	},
 	{
+		.id	= 0x01041180,
+		.mask	= 0xff0fffff,
+		.data	= &variant_arm_extended_fifo,
+	},
+	{
 		.id	= 0x00041181,
 		.mask	= 0x000fffff,
 		.data	= &variant_arm,
diff --git a/drivers/mmc/host/of_mmc_spi.c b/drivers/mmc/host/of_mmc_spi.c
index 5530def54e5b..e2aecb7f1d5c 100644
--- a/drivers/mmc/host/of_mmc_spi.c
+++ b/drivers/mmc/host/of_mmc_spi.c
@@ -15,9 +15,11 @@
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/slab.h>
+#include <linux/irq.h>
 #include <linux/gpio.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/of_irq.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/mmc_spi.h>
 #include <linux/mmc/core.h>
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 3b5248567973..a19967d0bfc4 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -16,14 +16,40 @@
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/sdhci-pltfm.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sdio.h>
 #include <mach/hardware.h>
 #include <mach/esdhc.h>
 #include "sdhci.h"
 #include "sdhci-pltfm.h"
 #include "sdhci-esdhc.h"
 
+/* VENDOR SPEC register */
+#define SDHCI_VENDOR_SPEC		0xC0
+#define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
+
+#define ESDHC_FLAG_GPIO_FOR_CD_WP	(1 << 0)
+/*
+ * The CMDTYPE of the CMD register (offset 0xE) should be set to
+ * "11" when the STOP CMD12 is issued on imx53 to abort one
+ * open ended multi-blk IO. Otherwise the TC INT wouldn't
+ * be generated.
+ * In exact block transfer, the controller doesn't complete the
+ * operations automatically as required at the end of the
+ * transfer and remains on hold if the abort command is not sent.
+ * As a result, the TC flag is not asserted and SW  received timeout
+ * exeception. Bit1 of Vendor Spec registor is used to fix it.
+ */
+#define ESDHC_FLAG_MULTIBLK_NO_INT	(1 << 1)
+
+struct pltfm_imx_data {
+	int flags;
+	u32 scratchpad;
+};
+
 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
 {
 	void __iomem *base = host->ioaddr + (reg & ~0x3);
@@ -34,10 +60,14 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
 
 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 {
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
 	/* fake CARD_PRESENT flag on mx25/35 */
 	u32 val = readl(host->ioaddr + reg);
 
-	if (unlikely(reg == SDHCI_PRESENT_STATE)) {
+	if (unlikely((reg == SDHCI_PRESENT_STATE)
+			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD_WP))) {
 		struct esdhc_platform_data *boarddata =
 				host->mmc->parent->platform_data;
 
@@ -55,13 +85,26 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 
 static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 {
-	if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE))
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
+	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
+			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD_WP)))
 		/*
 		 * these interrupts won't work with a custom card_detect gpio
 		 * (only applied to mx25/35)
 		 */
 		val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
 
+	if (unlikely((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
+				&& (reg == SDHCI_INT_STATUS)
+				&& (val & SDHCI_INT_DATA_END))) {
+			u32 v;
+			v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
+			v &= ~SDHCI_VENDOR_SPEC_SDIO_QUIRK;
+			writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
+	}
+
 	writel(val, host->ioaddr + reg);
 }
 
@@ -76,6 +119,7 @@ static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
 static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
 
 	switch (reg) {
 	case SDHCI_TRANSFER_MODE:
@@ -83,10 +127,22 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
 		 * Postpone this write, we must do it together with a
 		 * command write that is down below.
 		 */
-		pltfm_host->scratchpad = val;
+		if ((imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
+				&& (host->cmd->opcode == SD_IO_RW_EXTENDED)
+				&& (host->cmd->data->blocks > 1)
+				&& (host->cmd->data->flags & MMC_DATA_READ)) {
+			u32 v;
+			v = readl(host->ioaddr + SDHCI_VENDOR_SPEC);
+			v |= SDHCI_VENDOR_SPEC_SDIO_QUIRK;
+			writel(v, host->ioaddr + SDHCI_VENDOR_SPEC);
+		}
+		imx_data->scratchpad = val;
 		return;
 	case SDHCI_COMMAND:
-		writel(val << 16 | pltfm_host->scratchpad,
+		if ((host->cmd->opcode == MMC_STOP_TRANSMISSION)
+			&& (imx_data->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
+			val |= SDHCI_CMD_ABORTCMD;
+		writel(val << 16 | imx_data->scratchpad,
 			host->ioaddr + SDHCI_TRANSFER_MODE);
 		return;
 	case SDHCI_BLOCK_SIZE:
@@ -146,7 +202,9 @@ static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
 }
 
 static struct sdhci_ops sdhci_esdhc_ops = {
+	.read_l = esdhc_readl_le,
 	.read_w = esdhc_readw_le,
+	.write_l = esdhc_writel_le,
 	.write_w = esdhc_writew_le,
 	.write_b = esdhc_writeb_le,
 	.set_clock = esdhc_set_clock,
@@ -168,6 +226,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 	struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
 	struct clk *clk;
 	int err;
+	struct pltfm_imx_data *imx_data;
 
 	clk = clk_get(mmc_dev(host->mmc), NULL);
 	if (IS_ERR(clk)) {
@@ -177,7 +236,15 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 	clk_enable(clk);
 	pltfm_host->clk = clk;
 
-	if (cpu_is_mx35() || cpu_is_mx51())
+	imx_data = kzalloc(sizeof(struct pltfm_imx_data), GFP_KERNEL);
+	if (!imx_data) {
+		clk_disable(pltfm_host->clk);
+		clk_put(pltfm_host->clk);
+		return -ENOMEM;
+	}
+	pltfm_host->priv = imx_data;
+
+	if (!cpu_is_mx25())
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
 	if (cpu_is_mx25() || cpu_is_mx35()) {
@@ -187,6 +254,9 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 		sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
 	}
 
+	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
+		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
+
 	if (boarddata) {
 		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
 		if (err) {
@@ -214,8 +284,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
 			goto no_card_detect_irq;
 		}
 
-		sdhci_esdhc_ops.write_l = esdhc_writel_le;
-		sdhci_esdhc_ops.read_l = esdhc_readl_le;
+		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD_WP;
 		/* Now we have a working card_detect again */
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
 	}
@@ -227,6 +296,7 @@ static int esdhc_pltfm_init(struct sdhci_host *host, struct sdhci_pltfm_data *pd
  no_card_detect_pin:
 	boarddata->cd_gpio = err;
  not_supported:
+	kfree(imx_data);
 	return 0;
 }
 
@@ -234,6 +304,7 @@ static void esdhc_pltfm_exit(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;
+	struct pltfm_imx_data *imx_data = pltfm_host->priv;
 
 	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
 		gpio_free(boarddata->wp_gpio);
@@ -247,6 +318,7 @@ static void esdhc_pltfm_exit(struct sdhci_host *host)
 
 	clk_disable(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
+	kfree(imx_data);
 }
 
 struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index c55aae828aac..c3b08f111942 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -23,8 +23,7 @@
 				SDHCI_QUIRK_NONSTANDARD_CLOCK | \
 				SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK | \
 				SDHCI_QUIRK_PIO_NEEDS_DELAY | \
-				SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET | \
-				SDHCI_QUIRK_NO_CARD_NO_RESET)
+				SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
 
 #define ESDHC_SYSTEM_CONTROL	0x2c
 #define ESDHC_CLOCK_MASK	0x0000fff0
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 08161f690ae8..ba40d6d035c7 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -74,7 +74,8 @@ static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
 
 struct sdhci_of_data sdhci_esdhc = {
 	/* card detection could be handled via GPIO */
-	.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION,
+	.quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
+		| SDHCI_QUIRK_NO_CARD_NO_RESET,
 	.ops = {
 		.read_l = sdhci_be32bs_readl,
 		.read_w = esdhc_readw,
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 2f8d46854acd..a136be706347 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -1016,16 +1016,14 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 	struct sdhci_pci_chip *chip;
 	struct sdhci_pci_slot *slot;
 
-	u8 slots, rev, first_bar;
+	u8 slots, first_bar;
 	int ret, i;
 
 	BUG_ON(pdev == NULL);
 	BUG_ON(ent == NULL);
 
-	pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
-
 	dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
-		 (int)pdev->vendor, (int)pdev->device, (int)rev);
+		 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
 
 	ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
 	if (ret)
diff --git a/drivers/mmc/host/sdhci-pltfm.h b/drivers/mmc/host/sdhci-pltfm.h
index ea2e44d9be5e..2b37016ad0ac 100644
--- a/drivers/mmc/host/sdhci-pltfm.h
+++ b/drivers/mmc/host/sdhci-pltfm.h
@@ -17,7 +17,7 @@
 
 struct sdhci_pltfm_host {
 	struct clk *clk;
-	u32 scratchpad; /* to handle quirks across io-accessor calls */
+	void *priv; /* to handle quirks across io-accessor calls */
 };
 
 extern struct sdhci_pltfm_data sdhci_cns3xxx_pdata;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 6e0969e40650..25e8bde600d1 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -45,6 +45,7 @@
 #define  SDHCI_CMD_CRC		0x08
 #define  SDHCI_CMD_INDEX	0x10
 #define  SDHCI_CMD_DATA		0x20
+#define  SDHCI_CMD_ABORTCMD	0xC0
 
 #define  SDHCI_CMD_RESP_NONE	0x00
 #define  SDHCI_CMD_RESP_LONG	0x01
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
new file mode 100644
index 000000000000..cc701236d16f
--- /dev/null
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -0,0 +1,171 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on "Compaq ASIC3 support":
+ *
+ * Copyright 2001 Compaq Computer Corporation.
+ * Copyright 2004-2005 Phil Blundell
+ * Copyright 2007-2008 OpenedHand Ltd.
+ *
+ * Authors: Phil Blundell <pb@handhelds.org>,
+ *	    Samuel Ortiz <sameo@openedhand.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/sh_mobile_sdhi.h>
+#include <linux/mfd/tmio.h>
+#include <linux/sh_dma.h>
+
+#include "tmio_mmc.h"
+
+struct sh_mobile_sdhi {
+	struct clk *clk;
+	struct tmio_mmc_data mmc_data;
+	struct sh_dmae_slave param_tx;
+	struct sh_dmae_slave param_rx;
+	struct tmio_mmc_dma dma_priv;
+};
+
+static void sh_mobile_sdhi_set_pwr(struct platform_device *pdev, int state)
+{
+	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+
+	if (p && p->set_pwr)
+		p->set_pwr(pdev, state);
+}
+
+static int sh_mobile_sdhi_get_cd(struct platform_device *pdev)
+{
+	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+
+	if (p && p->get_cd)
+		return p->get_cd(pdev);
+	else
+		return -ENOSYS;
+}
+
+static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
+{
+	struct sh_mobile_sdhi *priv;
+	struct tmio_mmc_data *mmc_data;
+	struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
+	struct tmio_mmc_host *host;
+	char clk_name[8];
+	int ret;
+
+	priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
+	if (priv == NULL) {
+		dev_err(&pdev->dev, "kzalloc failed\n");
+		return -ENOMEM;
+	}
+
+	mmc_data = &priv->mmc_data;
+
+	snprintf(clk_name, sizeof(clk_name), "sdhi%d", pdev->id);
+	priv->clk = clk_get(&pdev->dev, clk_name);
+	if (IS_ERR(priv->clk)) {
+		dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+		ret = PTR_ERR(priv->clk);
+		goto eclkget;
+	}
+
+	clk_enable(priv->clk);
+
+	mmc_data->hclk = clk_get_rate(priv->clk);
+	mmc_data->set_pwr = sh_mobile_sdhi_set_pwr;
+	mmc_data->get_cd = sh_mobile_sdhi_get_cd;
+	mmc_data->capabilities = MMC_CAP_MMC_HIGHSPEED;
+	if (p) {
+		mmc_data->flags = p->tmio_flags;
+		mmc_data->ocr_mask = p->tmio_ocr_mask;
+		mmc_data->capabilities |= p->tmio_caps;
+
+		if (p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
+			priv->param_tx.slave_id = p->dma_slave_tx;
+			priv->param_rx.slave_id = p->dma_slave_rx;
+			priv->dma_priv.chan_priv_tx = &priv->param_tx;
+			priv->dma_priv.chan_priv_rx = &priv->param_rx;
+			priv->dma_priv.alignment_shift = 1; /* 2-byte alignment */
+			mmc_data->dma = &priv->dma_priv;
+		}
+	}
+
+	/*
+	 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
+	 * bus width mode.
+	 */
+	mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
+
+	/*
+	 * All SDHI blocks support SDIO IRQ signalling.
+	 */
+	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
+
+	ret = tmio_mmc_host_probe(&host, pdev, mmc_data);
+	if (ret < 0)
+		goto eprobe;
+
+	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
+		(unsigned long)host->ctl, host->irq);
+
+	return ret;
+
+eprobe:
+	clk_disable(priv->clk);
+	clk_put(priv->clk);
+eclkget:
+	kfree(priv);
+	return ret;
+}
+
+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);
+
+	tmio_mmc_host_remove(host);
+	clk_disable(priv->clk);
+	clk_put(priv->clk);
+	kfree(priv);
+
+	return 0;
+}
+
+static struct platform_driver sh_mobile_sdhi_driver = {
+	.driver		= {
+		.name	= "sh_mobile_sdhi",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= sh_mobile_sdhi_probe,
+	.remove		= __devexit_p(sh_mobile_sdhi_remove),
+};
+
+static int __init sh_mobile_sdhi_init(void)
+{
+	return platform_driver_register(&sh_mobile_sdhi_driver);
+}
+
+static void __exit sh_mobile_sdhi_exit(void)
+{
+	platform_driver_unregister(&sh_mobile_sdhi_driver);
+}
+
+module_init(sh_mobile_sdhi_init);
+module_exit(sh_mobile_sdhi_exit);
+
+MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:sh_mobile_sdhi");
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index ab1adeabdd22..79c568461d59 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -1,8 +1,8 @@
 /*
- *  linux/drivers/mmc/tmio_mmc.c
+ * linux/drivers/mmc/host/tmio_mmc.c
  *
- *  Copyright (C) 2004 Ian Molton
- *  Copyright (C) 2007 Ian Molton
+ * Copyright (C) 2007 Ian Molton
+ * Copyright (C) 2004 Ian Molton
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -11,1182 +11,17 @@
  * Driver for the MMC / SD / SDIO cell found in:
  *
  * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
- *
- * This driver draws mainly on scattered spec sheets, Reverse engineering
- * of the toshiba e800  SD driver and some parts of the 2.4 ASIC3 driver (4 bit
- * support). (Further 4 bit support from a later datasheet).
- *
- * TODO:
- *   Investigate using a workqueue for PIO transfers
- *   Eliminate FIXMEs
- *   SDIO support
- *   Better Power management
- *   Handle MMC errors better
- *   double buffer support
- *
  */
 
-#include <linux/delay.h>
 #include <linux/device.h>
-#include <linux/dmaengine.h>
-#include <linux/highmem.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/tmio.h>
 #include <linux/mmc/host.h>
 #include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/scatterlist.h>
-#include <linux/workqueue.h>
-#include <linux/spinlock.h>
-
-#define CTL_SD_CMD 0x00
-#define CTL_ARG_REG 0x04
-#define CTL_STOP_INTERNAL_ACTION 0x08
-#define CTL_XFER_BLK_COUNT 0xa
-#define CTL_RESPONSE 0x0c
-#define CTL_STATUS 0x1c
-#define CTL_IRQ_MASK 0x20
-#define CTL_SD_CARD_CLK_CTL 0x24
-#define CTL_SD_XFER_LEN 0x26
-#define CTL_SD_MEM_CARD_OPT 0x28
-#define CTL_SD_ERROR_DETAIL_STATUS 0x2c
-#define CTL_SD_DATA_PORT 0x30
-#define CTL_TRANSACTION_CTL 0x34
-#define CTL_SDIO_STATUS 0x36
-#define CTL_SDIO_IRQ_MASK 0x38
-#define CTL_RESET_SD 0xe0
-#define CTL_SDIO_REGS 0x100
-#define CTL_CLK_AND_WAIT_CTL 0x138
-#define CTL_RESET_SDIO 0x1e0
-
-/* Definitions for values the CTRL_STATUS register can take. */
-#define TMIO_STAT_CMDRESPEND    0x00000001
-#define TMIO_STAT_DATAEND       0x00000004
-#define TMIO_STAT_CARD_REMOVE   0x00000008
-#define TMIO_STAT_CARD_INSERT   0x00000010
-#define TMIO_STAT_SIGSTATE      0x00000020
-#define TMIO_STAT_WRPROTECT     0x00000080
-#define TMIO_STAT_CARD_REMOVE_A 0x00000100
-#define TMIO_STAT_CARD_INSERT_A 0x00000200
-#define TMIO_STAT_SIGSTATE_A    0x00000400
-#define TMIO_STAT_CMD_IDX_ERR   0x00010000
-#define TMIO_STAT_CRCFAIL       0x00020000
-#define TMIO_STAT_STOPBIT_ERR   0x00040000
-#define TMIO_STAT_DATATIMEOUT   0x00080000
-#define TMIO_STAT_RXOVERFLOW    0x00100000
-#define TMIO_STAT_TXUNDERRUN    0x00200000
-#define TMIO_STAT_CMDTIMEOUT    0x00400000
-#define TMIO_STAT_RXRDY         0x01000000
-#define TMIO_STAT_TXRQ          0x02000000
-#define TMIO_STAT_ILL_FUNC      0x20000000
-#define TMIO_STAT_CMD_BUSY      0x40000000
-#define TMIO_STAT_ILL_ACCESS    0x80000000
-
-/* Definitions for values the CTRL_SDIO_STATUS register can take. */
-#define TMIO_SDIO_STAT_IOIRQ	0x0001
-#define TMIO_SDIO_STAT_EXPUB52	0x4000
-#define TMIO_SDIO_STAT_EXWT	0x8000
-#define TMIO_SDIO_MASK_ALL	0xc007
-
-/* Define some IRQ masks */
-/* This is the mask used at reset by the chip */
-#define TMIO_MASK_ALL           0x837f031d
-#define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
-#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
-#define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
-		TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
-#define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
-
-#define enable_mmc_irqs(host, i) \
-	do { \
-		u32 mask;\
-		mask  = sd_ctrl_read32((host), CTL_IRQ_MASK); \
-		mask &= ~((i) & TMIO_MASK_IRQ); \
-		sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
-	} while (0)
-
-#define disable_mmc_irqs(host, i) \
-	do { \
-		u32 mask;\
-		mask  = sd_ctrl_read32((host), CTL_IRQ_MASK); \
-		mask |= ((i) & TMIO_MASK_IRQ); \
-		sd_ctrl_write32((host), CTL_IRQ_MASK, mask); \
-	} while (0)
-
-#define ack_mmc_irqs(host, i) \
-	do { \
-		sd_ctrl_write32((host), CTL_STATUS, ~(i)); \
-	} while (0)
-
-/* This is arbitrary, just noone needed any higher alignment yet */
-#define MAX_ALIGN 4
-
-struct tmio_mmc_host {
-	void __iomem *ctl;
-	unsigned long bus_shift;
-	struct mmc_command      *cmd;
-	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);
-
-	/* pio related stuff */
-	struct scatterlist      *sg_ptr;
-	struct scatterlist      *sg_orig;
-	unsigned int            sg_len;
-	unsigned int            sg_off;
-
-	struct platform_device *pdev;
-
-	/* DMA support */
-	struct dma_chan		*chan_rx;
-	struct dma_chan		*chan_tx;
-	struct tasklet_struct	dma_complete;
-	struct tasklet_struct	dma_issue;
-#ifdef CONFIG_TMIO_MMC_DMA
-	u8			bounce_buf[PAGE_CACHE_SIZE] __attribute__((aligned(MAX_ALIGN)));
-	struct scatterlist	bounce_sg;
-#endif
-
-	/* Track lost interrupts */
-	struct delayed_work	delayed_reset_work;
-	spinlock_t		lock;
-	unsigned long		last_req_ts;
-};
-
-static void tmio_check_bounce_buffer(struct tmio_mmc_host *host);
-
-static u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
-{
-	return readw(host->ctl + (addr << host->bus_shift));
-}
-
-static void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
-		u16 *buf, int count)
-{
-	readsw(host->ctl + (addr << host->bus_shift), buf, count);
-}
-
-static u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
-{
-	return readw(host->ctl + (addr << host->bus_shift)) |
-	       readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
-}
-
-static void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
-{
-	writew(val, host->ctl + (addr << host->bus_shift));
-}
-
-static void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
-		u16 *buf, int count)
-{
-	writesw(host->ctl + (addr << host->bus_shift), buf, count);
-}
-
-static void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
-{
-	writew(val, host->ctl + (addr << host->bus_shift));
-	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
-}
-
-static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
-{
-	host->sg_len = data->sg_len;
-	host->sg_ptr = data->sg;
-	host->sg_orig = data->sg;
-	host->sg_off = 0;
-}
-
-static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
-{
-	host->sg_ptr = sg_next(host->sg_ptr);
-	host->sg_off = 0;
-	return --host->sg_len;
-}
-
-static char *tmio_mmc_kmap_atomic(struct scatterlist *sg, unsigned long *flags)
-{
-	local_irq_save(*flags);
-	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
-}
-
-static void tmio_mmc_kunmap_atomic(struct scatterlist *sg, unsigned long *flags, void *virt)
-{
-	kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
-	local_irq_restore(*flags);
-}
-
-#ifdef CONFIG_MMC_DEBUG
-
-#define STATUS_TO_TEXT(a, status, i) \
-	do { \
-		if (status & TMIO_STAT_##a) { \
-			if (i++) \
-				printk(" | "); \
-			printk(#a); \
-		} \
-	} while (0)
-
-void pr_debug_status(u32 status)
-{
-	int i = 0;
-	printk(KERN_DEBUG "status: %08x = ", status);
-	STATUS_TO_TEXT(CARD_REMOVE, status, i);
-	STATUS_TO_TEXT(CARD_INSERT, status, i);
-	STATUS_TO_TEXT(SIGSTATE, status, i);
-	STATUS_TO_TEXT(WRPROTECT, status, i);
-	STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
-	STATUS_TO_TEXT(CARD_INSERT_A, status, i);
-	STATUS_TO_TEXT(SIGSTATE_A, status, i);
-	STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
-	STATUS_TO_TEXT(STOPBIT_ERR, status, i);
-	STATUS_TO_TEXT(ILL_FUNC, status, i);
-	STATUS_TO_TEXT(CMD_BUSY, status, i);
-	STATUS_TO_TEXT(CMDRESPEND, status, i);
-	STATUS_TO_TEXT(DATAEND, status, i);
-	STATUS_TO_TEXT(CRCFAIL, status, i);
-	STATUS_TO_TEXT(DATATIMEOUT, status, i);
-	STATUS_TO_TEXT(CMDTIMEOUT, status, i);
-	STATUS_TO_TEXT(RXOVERFLOW, status, i);
-	STATUS_TO_TEXT(TXUNDERRUN, status, i);
-	STATUS_TO_TEXT(RXRDY, status, i);
-	STATUS_TO_TEXT(TXRQ, status, i);
-	STATUS_TO_TEXT(ILL_ACCESS, status, i);
-	printk("\n");
-}
-
-#else
-#define pr_debug_status(s)  do { } while (0)
-#endif
-
-static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	if (enable) {
-		host->sdio_irq_enabled = 1;
-		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
-		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK,
-			(TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ));
-	} else {
-		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, TMIO_SDIO_MASK_ALL);
-		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
-		host->sdio_irq_enabled = 0;
-	}
-}
-
-static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
-{
-	u32 clk = 0, clock;
-
-	if (new_clock) {
-		for (clock = host->mmc->f_min, clk = 0x80000080;
-			new_clock >= (clock<<1); clk >>= 1)
-			clock <<= 1;
-		clk |= 0x100;
-	}
-
-	if (host->set_clk_div)
-		host->set_clk_div(host->pdev, (clk>>22) & 1);
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
-}
-
-static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
-{
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-
-	/*
-	 * Testing on sh-mobile showed that SDIO IRQs are unmasked when
-	 * CTL_CLK_AND_WAIT_CTL gets written, so we have to disable the
-	 * device IRQ here and restore the SDIO IRQ mask before
-	 * re-enabling the device IRQ.
-	 */
-	if (pdata->flags & TMIO_MMC_SDIO_IRQ)
-		disable_irq(host->irq);
-	sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
-	msleep(10);
-	if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
-		tmio_mmc_enable_sdio_irq(host->mmc, host->sdio_irq_enabled);
-		enable_irq(host->irq);
-	}
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
-		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(10);
-}
-
-static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
-{
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
-		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(10);
-	/* see comment in tmio_mmc_clk_stop above */
-	if (pdata->flags & TMIO_MMC_SDIO_IRQ)
-		disable_irq(host->irq);
-	sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
-	msleep(10);
-	if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
-		tmio_mmc_enable_sdio_irq(host->mmc, host->sdio_irq_enabled);
-		enable_irq(host->irq);
-	}
-}
-
-static void reset(struct tmio_mmc_host *host)
-{
-	/* FIXME - should we set stop clock reg here */
-	sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
-	sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
-	msleep(10);
-	sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
-	sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
-	msleep(10);
-}
-
-static void tmio_mmc_reset_work(struct work_struct *work)
-{
-	struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
-						  delayed_reset_work.work);
-	struct mmc_request *mrq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&host->lock, flags);
-	mrq = host->mrq;
-
-	/* request already finished */
-	if (!mrq
-	    || time_is_after_jiffies(host->last_req_ts +
-		msecs_to_jiffies(2000))) {
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
-	}
-
-	dev_warn(&host->pdev->dev,
-		"timeout waiting for hardware interrupt (CMD%u)\n",
-		mrq->cmd->opcode);
-
-	if (host->data)
-		host->data->error = -ETIMEDOUT;
-	else if (host->cmd)
-		host->cmd->error = -ETIMEDOUT;
-	else
-		mrq->cmd->error = -ETIMEDOUT;
-
-	host->cmd = NULL;
-	host->data = NULL;
-	host->mrq = NULL;
-
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	reset(host);
-
-	mmc_request_done(host->mmc, mrq);
-}
-
-static void
-tmio_mmc_finish_request(struct tmio_mmc_host *host)
-{
-	struct mmc_request *mrq = host->mrq;
-
-	if (!mrq)
-		return;
-
-	host->mrq = NULL;
-	host->cmd = NULL;
-	host->data = NULL;
-
-	cancel_delayed_work(&host->delayed_reset_work);
-
-	mmc_request_done(host->mmc, mrq);
-}
-
-/* These are the bitmasks the tmio chip requires to implement the MMC response
- * types. Note that R1 and R6 are the same in this scheme. */
-#define APP_CMD        0x0040
-#define RESP_NONE      0x0300
-#define RESP_R1        0x0400
-#define RESP_R1B       0x0500
-#define RESP_R2        0x0600
-#define RESP_R3        0x0700
-#define DATA_PRESENT   0x0800
-#define TRANSFER_READ  0x1000
-#define TRANSFER_MULTI 0x2000
-#define SECURITY_CMD   0x4000
-
-static int
-tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
-{
-	struct mmc_data *data = host->data;
-	int c = cmd->opcode;
-
-	/* Command 12 is handled by hardware */
-	if (cmd->opcode == 12 && !cmd->arg) {
-		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
-		return 0;
-	}
-
-	switch (mmc_resp_type(cmd)) {
-	case MMC_RSP_NONE: c |= RESP_NONE; break;
-	case MMC_RSP_R1:   c |= RESP_R1;   break;
-	case MMC_RSP_R1B:  c |= RESP_R1B;  break;
-	case MMC_RSP_R2:   c |= RESP_R2;   break;
-	case MMC_RSP_R3:   c |= RESP_R3;   break;
-	default:
-		pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
-		return -EINVAL;
-	}
-
-	host->cmd = cmd;
-
-/* FIXME - this seems to be ok commented out but the spec suggest this bit
- *         should be set when issuing app commands.
- *	if(cmd->flags & MMC_FLAG_ACMD)
- *		c |= APP_CMD;
- */
-	if (data) {
-		c |= DATA_PRESENT;
-		if (data->blocks > 1) {
-			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
-			c |= TRANSFER_MULTI;
-		}
-		if (data->flags & MMC_DATA_READ)
-			c |= TRANSFER_READ;
-	}
-
-	enable_mmc_irqs(host, TMIO_MASK_CMD);
-
-	/* Fire off the command */
-	sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
-	sd_ctrl_write16(host, CTL_SD_CMD, c);
-
-	return 0;
-}
-
-/*
- * This chip always returns (at least?) as much data as you ask for.
- * I'm unsure what happens if you ask for less than a block. This should be
- * looked into to ensure that a funny length read doesnt hose the controller.
- */
-static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
-{
-	struct mmc_data *data = host->data;
-	void *sg_virt;
-	unsigned short *buf;
-	unsigned int count;
-	unsigned long flags;
-
-	if (!data) {
-		pr_debug("Spurious PIO IRQ\n");
-		return;
-	}
-
-	sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
-	buf = (unsigned short *)(sg_virt + host->sg_off);
-
-	count = host->sg_ptr->length - host->sg_off;
-	if (count > data->blksz)
-		count = data->blksz;
-
-	pr_debug("count: %08x offset: %08x flags %08x\n",
-		 count, host->sg_off, data->flags);
-
-	/* Transfer the data */
-	if (data->flags & MMC_DATA_READ)
-		sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
-	else
-		sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
-
-	host->sg_off += count;
-
-	tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
-
-	if (host->sg_off == host->sg_ptr->length)
-		tmio_mmc_next_sg(host);
-
-	return;
-}
-
-/* needs to be called with host->lock held */
-static void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
-{
-	struct mmc_data *data = host->data;
-	struct mmc_command *stop;
-
-	host->data = NULL;
-
-	if (!data) {
-		dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
-		return;
-	}
-	stop = data->stop;
-
-	/* FIXME - return correct transfer count on errors */
-	if (!data->error)
-		data->bytes_xfered = data->blocks * data->blksz;
-	else
-		data->bytes_xfered = 0;
-
-	pr_debug("Completed data request\n");
-
-	/*
-	 * FIXME: other drivers allow an optional stop command of any given type
-	 *        which we dont do, as the chip can auto generate them.
-	 *        Perhaps we can be smarter about when to use auto CMD12 and
-	 *        only issue the auto request when we know this is the desired
-	 *        stop command, allowing fallback to the stop command the
-	 *        upper layers expect. For now, we do what works.
-	 */
-
-	if (data->flags & MMC_DATA_READ) {
-		if (!host->chan_rx)
-			disable_mmc_irqs(host, TMIO_MASK_READOP);
-		else
-			tmio_check_bounce_buffer(host);
-		dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
-			host->mrq);
-	} else {
-		if (!host->chan_tx)
-			disable_mmc_irqs(host, TMIO_MASK_WRITEOP);
-		dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
-			host->mrq);
-	}
-
-	if (stop) {
-		if (stop->opcode == 12 && !stop->arg)
-			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
-		else
-			BUG();
-	}
-
-	tmio_mmc_finish_request(host);
-}
-
-static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
-{
-	struct mmc_data *data;
-	spin_lock(&host->lock);
-	data = host->data;
-
-	if (!data)
-		goto out;
-
-	if (host->chan_tx && (data->flags & MMC_DATA_WRITE)) {
-		/*
-		 * Has all data been written out yet? Testing on SuperH showed,
-		 * that in most cases the first interrupt comes already with the
-		 * BUSY status bit clear, but on some operations, like mount or
-		 * in the beginning of a write / sync / umount, there is one
-		 * DATAEND interrupt with the BUSY bit set, in this cases
-		 * waiting for one more interrupt fixes the problem.
-		 */
-		if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
-			disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-			tasklet_schedule(&host->dma_complete);
-		}
-	} else if (host->chan_rx && (data->flags & MMC_DATA_READ)) {
-		disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-		tasklet_schedule(&host->dma_complete);
-	} else {
-		tmio_mmc_do_data_irq(host);
-	}
-out:
-	spin_unlock(&host->lock);
-}
-
-static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
-	unsigned int stat)
-{
-	struct mmc_command *cmd = host->cmd;
-	int i, addr;
-
-	spin_lock(&host->lock);
-
-	if (!host->cmd) {
-		pr_debug("Spurious CMD irq\n");
-		goto out;
-	}
-
-	host->cmd = NULL;
-
-	/* This controller is sicker than the PXA one. Not only do we need to
-	 * drop the top 8 bits of the first response word, we also need to
-	 * modify the order of the response for short response command types.
-	 */
-
-	for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
-		cmd->resp[i] = sd_ctrl_read32(host, addr);
-
-	if (cmd->flags &  MMC_RSP_136) {
-		cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
-		cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
-		cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
-		cmd->resp[3] <<= 8;
-	} else if (cmd->flags & MMC_RSP_R3) {
-		cmd->resp[0] = cmd->resp[3];
-	}
-
-	if (stat & TMIO_STAT_CMDTIMEOUT)
-		cmd->error = -ETIMEDOUT;
-	else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
-		cmd->error = -EILSEQ;
-
-	/* If there is data to handle we enable data IRQs here, and
-	 * we will ultimatley finish the request in the data_end handler.
-	 * If theres no data or we encountered an error, finish now.
-	 */
-	if (host->data && !cmd->error) {
-		if (host->data->flags & MMC_DATA_READ) {
-			if (!host->chan_rx)
-				enable_mmc_irqs(host, TMIO_MASK_READOP);
-		} else {
-			if (!host->chan_tx)
-				enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
-			else
-				tasklet_schedule(&host->dma_issue);
-		}
-	} else {
-		tmio_mmc_finish_request(host);
-	}
-
-out:
-	spin_unlock(&host->lock);
-
-	return;
-}
-
-static irqreturn_t tmio_mmc_irq(int irq, void *devid)
-{
-	struct tmio_mmc_host *host = devid;
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-	unsigned int ireg, irq_mask, status;
-	unsigned int sdio_ireg, sdio_irq_mask, sdio_status;
-
-	pr_debug("MMC IRQ begin\n");
-
-	status = sd_ctrl_read32(host, CTL_STATUS);
-	irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
-	ireg = status & TMIO_MASK_IRQ & ~irq_mask;
-
-	sdio_ireg = 0;
-	if (!ireg && pdata->flags & TMIO_MMC_SDIO_IRQ) {
-		sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
-		sdio_irq_mask = sd_ctrl_read16(host, CTL_SDIO_IRQ_MASK);
-		sdio_ireg = sdio_status & TMIO_SDIO_MASK_ALL & ~sdio_irq_mask;
-
-		sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status & ~TMIO_SDIO_MASK_ALL);
-
-		if (sdio_ireg && !host->sdio_irq_enabled) {
-			pr_warning("tmio_mmc: Spurious SDIO IRQ, disabling! 0x%04x 0x%04x 0x%04x\n",
-				   sdio_status, sdio_irq_mask, sdio_ireg);
-			tmio_mmc_enable_sdio_irq(host->mmc, 0);
-			goto out;
-		}
 
-		if (host->mmc->caps & MMC_CAP_SDIO_IRQ &&
-			sdio_ireg & TMIO_SDIO_STAT_IOIRQ)
-			mmc_signal_sdio_irq(host->mmc);
-
-		if (sdio_ireg)
-			goto out;
-	}
-
-	pr_debug_status(status);
-	pr_debug_status(ireg);
-
-	if (!ireg) {
-		disable_mmc_irqs(host, status & ~irq_mask);
-
-		pr_warning("tmio_mmc: Spurious irq, disabling! "
-			"0x%08x 0x%08x 0x%08x\n", status, irq_mask, ireg);
-		pr_debug_status(status);
-
-		goto out;
-	}
-
-	while (ireg) {
-		/* Card insert / remove attempts */
-		if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
-			ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
-				TMIO_STAT_CARD_REMOVE);
-			mmc_detect_change(host->mmc, msecs_to_jiffies(100));
-		}
-
-		/* CRC and other errors */
-/*		if (ireg & TMIO_STAT_ERR_IRQ)
- *			handled |= tmio_error_irq(host, irq, stat);
- */
-
-		/* Command completion */
-		if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
-			ack_mmc_irqs(host,
-				     TMIO_STAT_CMDRESPEND |
-				     TMIO_STAT_CMDTIMEOUT);
-			tmio_mmc_cmd_irq(host, status);
-		}
-
-		/* Data transfer */
-		if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
-			ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
-			tmio_mmc_pio_irq(host);
-		}
-
-		/* Data transfer completion */
-		if (ireg & TMIO_STAT_DATAEND) {
-			ack_mmc_irqs(host, TMIO_STAT_DATAEND);
-			tmio_mmc_data_irq(host);
-		}
-
-		/* Check status - keep going until we've handled it all */
-		status = sd_ctrl_read32(host, CTL_STATUS);
-		irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
-		ireg = status & TMIO_MASK_IRQ & ~irq_mask;
-
-		pr_debug("Status at end of loop: %08x\n", status);
-		pr_debug_status(status);
-	}
-	pr_debug("MMC IRQ end\n");
-
-out:
-	return IRQ_HANDLED;
-}
-
-#ifdef CONFIG_TMIO_MMC_DMA
-static void tmio_check_bounce_buffer(struct tmio_mmc_host *host)
-{
-	if (host->sg_ptr == &host->bounce_sg) {
-		unsigned long flags;
-		void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
-		memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
-		tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
-	}
-}
-
-static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
-{
-#if defined(CONFIG_SUPERH) || defined(CONFIG_ARCH_SHMOBILE)
-	/* Switch DMA mode on or off - SuperH specific? */
-	sd_ctrl_write16(host, 0xd8, enable ? 2 : 0);
-#endif
-}
-
-static void tmio_dma_complete(void *arg)
-{
-	struct tmio_mmc_host *host = arg;
-
-	dev_dbg(&host->pdev->dev, "Command completed\n");
-
-	if (!host->data)
-		dev_warn(&host->pdev->dev, "NULL data in DMA completion!\n");
-	else
-		enable_mmc_irqs(host, TMIO_STAT_DATAEND);
-}
-
-static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
-{
-	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
-	struct dma_async_tx_descriptor *desc = NULL;
-	struct dma_chan *chan = host->chan_rx;
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-	dma_cookie_t cookie;
-	int ret, i;
-	bool aligned = true, multiple = true;
-	unsigned int align = (1 << pdata->dma->alignment_shift) - 1;
-
-	for_each_sg(sg, sg_tmp, host->sg_len, i) {
-		if (sg_tmp->offset & align)
-			aligned = false;
-		if (sg_tmp->length & align) {
-			multiple = false;
-			break;
-		}
-	}
-
-	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
-			  align >= MAX_ALIGN)) || !multiple) {
-		ret = -EINVAL;
-		goto pio;
-	}
-
-	/* The only sg element can be unaligned, use our bounce buffer then */
-	if (!aligned) {
-		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
-		host->sg_ptr = &host->bounce_sg;
-		sg = host->sg_ptr;
-	}
-
-	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
-	if (ret > 0)
-		desc = chan->device->device_prep_slave_sg(chan, sg, ret,
-			DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-	if (desc) {
-		desc->callback = tmio_dma_complete;
-		desc->callback_param = host;
-		cookie = dmaengine_submit(desc);
-		dma_async_issue_pending(chan);
-	}
-	dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
-		__func__, host->sg_len, ret, cookie, host->mrq);
-
-pio:
-	if (!desc) {
-		/* DMA failed, fall back to PIO */
-		if (ret >= 0)
-			ret = -EIO;
-		host->chan_rx = NULL;
-		dma_release_channel(chan);
-		/* Free the Tx channel too */
-		chan = host->chan_tx;
-		if (chan) {
-			host->chan_tx = NULL;
-			dma_release_channel(chan);
-		}
-		dev_warn(&host->pdev->dev,
-			 "DMA failed: %d, falling back to PIO\n", ret);
-		tmio_mmc_enable_dma(host, false);
-	}
-
-	dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
-		desc, cookie, host->sg_len);
-}
-
-static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
-{
-	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
-	struct dma_async_tx_descriptor *desc = NULL;
-	struct dma_chan *chan = host->chan_tx;
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-	dma_cookie_t cookie;
-	int ret, i;
-	bool aligned = true, multiple = true;
-	unsigned int align = (1 << pdata->dma->alignment_shift) - 1;
-
-	for_each_sg(sg, sg_tmp, host->sg_len, i) {
-		if (sg_tmp->offset & align)
-			aligned = false;
-		if (sg_tmp->length & align) {
-			multiple = false;
-			break;
-		}
-	}
-
-	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
-			  align >= MAX_ALIGN)) || !multiple) {
-		ret = -EINVAL;
-		goto pio;
-	}
-
-	/* The only sg element can be unaligned, use our bounce buffer then */
-	if (!aligned) {
-		unsigned long flags;
-		void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
-		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
-		memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
-		tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
-		host->sg_ptr = &host->bounce_sg;
-		sg = host->sg_ptr;
-	}
-
-	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
-	if (ret > 0)
-		desc = chan->device->device_prep_slave_sg(chan, sg, ret,
-			DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-	if (desc) {
-		desc->callback = tmio_dma_complete;
-		desc->callback_param = host;
-		cookie = dmaengine_submit(desc);
-	}
-	dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
-		__func__, host->sg_len, ret, cookie, host->mrq);
-
-pio:
-	if (!desc) {
-		/* DMA failed, fall back to PIO */
-		if (ret >= 0)
-			ret = -EIO;
-		host->chan_tx = NULL;
-		dma_release_channel(chan);
-		/* Free the Rx channel too */
-		chan = host->chan_rx;
-		if (chan) {
-			host->chan_rx = NULL;
-			dma_release_channel(chan);
-		}
-		dev_warn(&host->pdev->dev,
-			 "DMA failed: %d, falling back to PIO\n", ret);
-		tmio_mmc_enable_dma(host, false);
-	}
-
-	dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d\n", __func__,
-		desc, cookie);
-}
-
-static void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-			       struct mmc_data *data)
-{
-	if (data->flags & MMC_DATA_READ) {
-		if (host->chan_rx)
-			tmio_mmc_start_dma_rx(host);
-	} else {
-		if (host->chan_tx)
-			tmio_mmc_start_dma_tx(host);
-	}
-}
-
-static void tmio_issue_tasklet_fn(unsigned long priv)
-{
-	struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
-	struct dma_chan *chan = host->chan_tx;
-
-	dma_async_issue_pending(chan);
-}
-
-static void tmio_tasklet_fn(unsigned long arg)
-{
-	struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
-	unsigned long flags;
-
-	spin_lock_irqsave(&host->lock, flags);
-
-	if (!host->data)
-		goto out;
-
-	if (host->data->flags & MMC_DATA_READ)
-		dma_unmap_sg(host->chan_rx->device->dev,
-			     host->sg_ptr, host->sg_len,
-			     DMA_FROM_DEVICE);
-	else
-		dma_unmap_sg(host->chan_tx->device->dev,
-			     host->sg_ptr, host->sg_len,
-			     DMA_TO_DEVICE);
-
-	tmio_mmc_do_data_irq(host);
-out:
-	spin_unlock_irqrestore(&host->lock, flags);
-}
-
-/* It might be necessary to make filter MFD specific */
-static bool tmio_mmc_filter(struct dma_chan *chan, void *arg)
-{
-	dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg);
-	chan->private = arg;
-	return true;
-}
-
-static 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) {
-		dma_cap_mask_t mask;
-
-		dma_cap_zero(mask);
-		dma_cap_set(DMA_SLAVE, mask);
-
-		host->chan_tx = dma_request_channel(mask, tmio_mmc_filter,
-						    pdata->dma->chan_priv_tx);
-		dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
-			host->chan_tx);
-
-		if (!host->chan_tx)
-			return;
-
-		host->chan_rx = dma_request_channel(mask, tmio_mmc_filter,
-						    pdata->dma->chan_priv_rx);
-		dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
-			host->chan_rx);
-
-		if (!host->chan_rx) {
-			dma_release_channel(host->chan_tx);
-			host->chan_tx = NULL;
-			return;
-		}
-
-		tasklet_init(&host->dma_complete, tmio_tasklet_fn, (unsigned long)host);
-		tasklet_init(&host->dma_issue, tmio_issue_tasklet_fn, (unsigned long)host);
-
-		tmio_mmc_enable_dma(host, true);
-	}
-}
-
-static void tmio_mmc_release_dma(struct tmio_mmc_host *host)
-{
-	if (host->chan_tx) {
-		struct dma_chan *chan = host->chan_tx;
-		host->chan_tx = NULL;
-		dma_release_channel(chan);
-	}
-	if (host->chan_rx) {
-		struct dma_chan *chan = host->chan_rx;
-		host->chan_rx = NULL;
-		dma_release_channel(chan);
-	}
-}
-#else
-static void tmio_check_bounce_buffer(struct tmio_mmc_host *host)
-{
-}
-
-static void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-			       struct mmc_data *data)
-{
-}
-
-static void tmio_mmc_request_dma(struct tmio_mmc_host *host,
-				 struct tmio_mmc_data *pdata)
-{
-	host->chan_tx = NULL;
-	host->chan_rx = NULL;
-}
-
-static void tmio_mmc_release_dma(struct tmio_mmc_host *host)
-{
-}
-#endif
-
-static int tmio_mmc_start_data(struct tmio_mmc_host *host,
-	struct mmc_data *data)
-{
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-
-	pr_debug("setup data transfer: blocksize %08x  nr_blocks %d\n",
-		 data->blksz, data->blocks);
-
-	/* Some hardware cannot perform 2 byte requests in 4 bit mode */
-	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
-		int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
-
-		if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
-			pr_err("%s: %d byte block unsupported in 4 bit mode\n",
-			       mmc_hostname(host->mmc), data->blksz);
-			return -EINVAL;
-		}
-	}
-
-	tmio_mmc_init_sg(host, data);
-	host->data = data;
-
-	/* Set transfer length / blocksize */
-	sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
-	sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
-
-	tmio_mmc_start_dma(host, data);
-
-	return 0;
-}
-
-/* Process requests from the MMC layer */
-static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	int ret;
-
-	if (host->mrq)
-		pr_debug("request not null\n");
-
-	host->last_req_ts = jiffies;
-	wmb();
-	host->mrq = mrq;
-
-	if (mrq->data) {
-		ret = tmio_mmc_start_data(host, mrq->data);
-		if (ret)
-			goto fail;
-	}
-
-	ret = tmio_mmc_start_command(host, mrq->cmd);
-	if (!ret) {
-		schedule_delayed_work(&host->delayed_reset_work,
-				      msecs_to_jiffies(2000));
-		return;
-	}
-
-fail:
-	host->mrq = NULL;
-	mrq->cmd->error = ret;
-	mmc_request_done(mmc, mrq);
-}
-
-/* Set MMC clock / power.
- * Note: This controller uses a simple divider scheme therefore it cannot
- * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
- * MMC wont run that fast, it has to be clocked at 12MHz which is the next
- * slowest setting.
- */
-static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	if (ios->clock)
-		tmio_mmc_set_clock(host, ios->clock);
-
-	/* Power sequence - OFF -> ON -> UP */
-	switch (ios->power_mode) {
-	case MMC_POWER_OFF: /* power down SD bus */
-		if (host->set_pwr)
-			host->set_pwr(host->pdev, 0);
-		tmio_mmc_clk_stop(host);
-		break;
-	case MMC_POWER_ON: /* power up SD bus */
-		if (host->set_pwr)
-			host->set_pwr(host->pdev, 1);
-		break;
-	case MMC_POWER_UP: /* start bus clock */
-		tmio_mmc_clk_start(host);
-		break;
-	}
-
-	switch (ios->bus_width) {
-	case MMC_BUS_WIDTH_1:
-		sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
-	break;
-	case MMC_BUS_WIDTH_4:
-		sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
-	break;
-	}
-
-	/* Let things settle. delay taken from winCE driver */
-	udelay(140);
-}
-
-static int tmio_mmc_get_ro(struct mmc_host *mmc)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-
-	return ((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
-		(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)) ? 0 : 1;
-}
-
-static int tmio_mmc_get_cd(struct mmc_host *mmc)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	struct tmio_mmc_data *pdata = mfd_get_data(host->pdev);
-
-	if (!pdata->get_cd)
-		return -ENOSYS;
-	else
-		return pdata->get_cd(host->pdev);
-}
-
-static const struct mmc_host_ops tmio_mmc_ops = {
-	.request	= tmio_mmc_request,
-	.set_ios	= tmio_mmc_set_ios,
-	.get_ro         = tmio_mmc_get_ro,
-	.get_cd		= tmio_mmc_get_cd,
-	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
-};
+#include "tmio_mmc.h"
 
 #ifdef CONFIG_PM
 static int tmio_mmc_suspend(struct platform_device *dev, pm_message_t state)
@@ -1227,138 +62,54 @@ out:
 #define tmio_mmc_resume NULL
 #endif
 
-static int __devinit tmio_mmc_probe(struct platform_device *dev)
+static int __devinit tmio_mmc_probe(struct platform_device *pdev)
 {
-	const struct mfd_cell *cell = mfd_get_cell(dev);
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
 	struct tmio_mmc_data *pdata;
-	struct resource *res_ctl;
 	struct tmio_mmc_host *host;
-	struct mmc_host *mmc;
 	int ret = -EINVAL;
-	u32 irq_mask = TMIO_MASK_CMD;
 
-	if (dev->num_resources != 2)
+	if (pdev->num_resources != 2)
 		goto out;
 
-	res_ctl = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	if (!res_ctl)
-		goto out;
-
-	pdata = mfd_get_data(dev);
+	pdata = mfd_get_data(pdev);
 	if (!pdata || !pdata->hclk)
 		goto out;
 
-	ret = -ENOMEM;
-
-	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &dev->dev);
-	if (!mmc)
-		goto out;
-
-	host = mmc_priv(mmc);
-	host->mmc = mmc;
-	host->pdev = dev;
-	platform_set_drvdata(dev, mmc);
-
-	host->set_pwr = pdata->set_pwr;
-	host->set_clk_div = pdata->set_clk_div;
-
-	/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
-	host->bus_shift = resource_size(res_ctl) >> 10;
-
-	host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
-	if (!host->ctl)
-		goto host_free;
-
-	mmc->ops = &tmio_mmc_ops;
-	mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities;
-	mmc->f_max = pdata->hclk;
-	mmc->f_min = mmc->f_max / 512;
-	mmc->max_segs = 32;
-	mmc->max_blk_size = 512;
-	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
-		mmc->max_segs;
-	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
-	mmc->max_seg_size = mmc->max_req_size;
-	if (pdata->ocr_mask)
-		mmc->ocr_avail = pdata->ocr_mask;
-	else
-		mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-
 	/* Tell the MFD core we are ready to be enabled */
 	if (cell->enable) {
-		ret = cell->enable(dev);
+		ret = cell->enable(pdev);
 		if (ret)
-			goto unmap_ctl;
+			goto out;
 	}
 
-	tmio_mmc_clk_stop(host);
-	reset(host);
-
-	ret = platform_get_irq(dev, 0);
-	if (ret >= 0)
-		host->irq = ret;
-	else
-		goto cell_disable;
-
-	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(&dev->dev), host);
+	ret = tmio_mmc_host_probe(&host, pdev, pdata);
 	if (ret)
 		goto cell_disable;
 
-	spin_lock_init(&host->lock);
-
-	/* Init delayed work for request timeouts */
-	INIT_DELAYED_WORK(&host->delayed_reset_work, tmio_mmc_reset_work);
-
-	/* See if we also get DMA */
-	tmio_mmc_request_dma(host, pdata);
-
-	mmc_add_host(mmc);
-
 	pr_info("%s at 0x%08lx irq %d\n", mmc_hostname(host->mmc),
 		(unsigned long)host->ctl, host->irq);
 
-	/* Unmask the IRQs we want to know about */
-	if (!host->chan_rx)
-		irq_mask |= TMIO_MASK_READOP;
-	if (!host->chan_tx)
-		irq_mask |= TMIO_MASK_WRITEOP;
-	enable_mmc_irqs(host, irq_mask);
-
 	return 0;
 
 cell_disable:
 	if (cell->disable)
-		cell->disable(dev);
-unmap_ctl:
-	iounmap(host->ctl);
-host_free:
-	mmc_free_host(mmc);
+		cell->disable(pdev);
 out:
 	return ret;
 }
 
-static int __devexit tmio_mmc_remove(struct platform_device *dev)
+static int __devexit tmio_mmc_remove(struct platform_device *pdev)
 {
-	const struct mfd_cell *cell = mfd_get_cell(dev);
-	struct mmc_host *mmc = platform_get_drvdata(dev);
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	struct mmc_host *mmc = platform_get_drvdata(pdev);
 
-	platform_set_drvdata(dev, NULL);
+	platform_set_drvdata(pdev, NULL);
 
 	if (mmc) {
-		struct tmio_mmc_host *host = mmc_priv(mmc);
-		mmc_remove_host(mmc);
-		cancel_delayed_work_sync(&host->delayed_reset_work);
-		tmio_mmc_release_dma(host);
-		free_irq(host->irq, host);
+		tmio_mmc_host_remove(mmc_priv(mmc));
 		if (cell->disable)
-			cell->disable(dev);
-		iounmap(host->ctl);
-		mmc_free_host(mmc);
+			cell->disable(pdev);
 	}
 
 	return 0;
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
new file mode 100644
index 000000000000..099ed49a259b
--- /dev/null
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -0,0 +1,123 @@
+/*
+ * linux/drivers/mmc/host/tmio_mmc.h
+ *
+ * Copyright (C) 2007 Ian Molton
+ * Copyright (C) 2004 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Driver for the MMC / SD / SDIO cell found in:
+ *
+ * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
+ */
+
+#ifndef TMIO_MMC_H
+#define TMIO_MMC_H
+
+#include <linux/highmem.h>
+#include <linux/mmc/tmio.h>
+#include <linux/pagemap.h>
+
+/* Definitions for values the CTRL_SDIO_STATUS register can take. */
+#define TMIO_SDIO_STAT_IOIRQ	0x0001
+#define TMIO_SDIO_STAT_EXPUB52	0x4000
+#define TMIO_SDIO_STAT_EXWT	0x8000
+#define TMIO_SDIO_MASK_ALL	0xc007
+
+/* Define some IRQ masks */
+/* This is the mask used at reset by the chip */
+#define TMIO_MASK_ALL           0x837f031d
+#define TMIO_MASK_READOP  (TMIO_STAT_RXRDY | TMIO_STAT_DATAEND)
+#define TMIO_MASK_WRITEOP (TMIO_STAT_TXRQ | TMIO_STAT_DATAEND)
+#define TMIO_MASK_CMD     (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT | \
+		TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT)
+#define TMIO_MASK_IRQ     (TMIO_MASK_READOP | TMIO_MASK_WRITEOP | TMIO_MASK_CMD)
+
+struct tmio_mmc_data;
+
+struct tmio_mmc_host {
+	void __iomem *ctl;
+	unsigned long bus_shift;
+	struct mmc_command      *cmd;
+	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);
+
+	/* pio related stuff */
+	struct scatterlist      *sg_ptr;
+	struct scatterlist      *sg_orig;
+	unsigned int            sg_len;
+	unsigned int            sg_off;
+
+	struct platform_device *pdev;
+	struct tmio_mmc_data *pdata;
+
+	/* DMA support */
+	bool			force_pio;
+	struct dma_chan		*chan_rx;
+	struct dma_chan		*chan_tx;
+	struct tasklet_struct	dma_complete;
+	struct tasklet_struct	dma_issue;
+	struct scatterlist	bounce_sg;
+	u8			*bounce_buf;
+
+	/* Track lost interrupts */
+	struct delayed_work	delayed_reset_work;
+	spinlock_t		lock;
+	unsigned long		last_req_ts;
+};
+
+int tmio_mmc_host_probe(struct tmio_mmc_host **host,
+			struct platform_device *pdev,
+			struct tmio_mmc_data *pdata);
+void tmio_mmc_host_remove(struct tmio_mmc_host *host);
+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);
+
+static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
+					 unsigned long *flags)
+{
+	local_irq_save(*flags);
+	return kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset;
+}
+
+static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
+					  unsigned long *flags, void *virt)
+{
+	kunmap_atomic(virt - sg->offset, KM_BIO_SRC_IRQ);
+	local_irq_restore(*flags);
+}
+
+#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
+void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
+void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
+void tmio_mmc_release_dma(struct tmio_mmc_host *host);
+#else
+static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
+			       struct mmc_data *data)
+{
+}
+
+static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
+				 struct tmio_mmc_data *pdata)
+{
+	host->chan_tx = NULL;
+	host->chan_rx = NULL;
+}
+
+static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
+{
+}
+#endif
+
+#endif
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
new file mode 100644
index 000000000000..d3de74ab633e
--- /dev/null
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -0,0 +1,317 @@
+/*
+ * linux/drivers/mmc/tmio_mmc_dma.c
+ *
+ * Copyright (C) 2010-2011 Guennadi Liakhovetski
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * DMA function for TMIO MMC implementations
+ */
+
+#include <linux/device.h>
+#include <linux/dmaengine.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/tmio.h>
+#include <linux/pagemap.h>
+#include <linux/scatterlist.h>
+
+#include "tmio_mmc.h"
+
+#define TMIO_MMC_MIN_DMA_LEN 8
+
+static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
+{
+#if defined(CONFIG_SUPERH) || defined(CONFIG_ARCH_SHMOBILE)
+	/* Switch DMA mode on or off - SuperH specific? */
+	writew(enable ? 2 : 0, host->ctl + (0xd8 << host->bus_shift));
+#endif
+}
+
+static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
+{
+	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
+	struct dma_async_tx_descriptor *desc = NULL;
+	struct dma_chan *chan = host->chan_rx;
+	struct tmio_mmc_data *pdata = host->pdata;
+	dma_cookie_t cookie;
+	int ret, i;
+	bool aligned = true, multiple = true;
+	unsigned int align = (1 << pdata->dma->alignment_shift) - 1;
+
+	for_each_sg(sg, sg_tmp, host->sg_len, i) {
+		if (sg_tmp->offset & align)
+			aligned = false;
+		if (sg_tmp->length & align) {
+			multiple = false;
+			break;
+		}
+	}
+
+	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
+			  (align & PAGE_MASK))) || !multiple) {
+		ret = -EINVAL;
+		goto pio;
+	}
+
+	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
+		host->force_pio = true;
+		return;
+	}
+
+	tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_RXRDY);
+
+	/* The only sg element can be unaligned, use our bounce buffer then */
+	if (!aligned) {
+		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
+		host->sg_ptr = &host->bounce_sg;
+		sg = host->sg_ptr;
+	}
+
+	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
+	if (ret > 0)
+		desc = chan->device->device_prep_slave_sg(chan, sg, ret,
+			DMA_FROM_DEVICE, DMA_CTRL_ACK);
+
+	if (desc) {
+		cookie = dmaengine_submit(desc);
+		if (cookie < 0) {
+			desc = NULL;
+			ret = cookie;
+		}
+	}
+	dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
+		__func__, host->sg_len, ret, cookie, host->mrq);
+
+pio:
+	if (!desc) {
+		/* DMA failed, fall back to PIO */
+		if (ret >= 0)
+			ret = -EIO;
+		host->chan_rx = NULL;
+		dma_release_channel(chan);
+		/* Free the Tx channel too */
+		chan = host->chan_tx;
+		if (chan) {
+			host->chan_tx = NULL;
+			dma_release_channel(chan);
+		}
+		dev_warn(&host->pdev->dev,
+			 "DMA failed: %d, falling back to PIO\n", ret);
+		tmio_mmc_enable_dma(host, false);
+	}
+
+	dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
+		desc, cookie, host->sg_len);
+}
+
+static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
+{
+	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
+	struct dma_async_tx_descriptor *desc = NULL;
+	struct dma_chan *chan = host->chan_tx;
+	struct tmio_mmc_data *pdata = host->pdata;
+	dma_cookie_t cookie;
+	int ret, i;
+	bool aligned = true, multiple = true;
+	unsigned int align = (1 << pdata->dma->alignment_shift) - 1;
+
+	for_each_sg(sg, sg_tmp, host->sg_len, i) {
+		if (sg_tmp->offset & align)
+			aligned = false;
+		if (sg_tmp->length & align) {
+			multiple = false;
+			break;
+		}
+	}
+
+	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
+			  (align & PAGE_MASK))) || !multiple) {
+		ret = -EINVAL;
+		goto pio;
+	}
+
+	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
+		host->force_pio = true;
+		return;
+	}
+
+	tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_TXRQ);
+
+	/* The only sg element can be unaligned, use our bounce buffer then */
+	if (!aligned) {
+		unsigned long flags;
+		void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
+		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
+		memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
+		tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
+		host->sg_ptr = &host->bounce_sg;
+		sg = host->sg_ptr;
+	}
+
+	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
+	if (ret > 0)
+		desc = chan->device->device_prep_slave_sg(chan, sg, ret,
+			DMA_TO_DEVICE, DMA_CTRL_ACK);
+
+	if (desc) {
+		cookie = dmaengine_submit(desc);
+		if (cookie < 0) {
+			desc = NULL;
+			ret = cookie;
+		}
+	}
+	dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
+		__func__, host->sg_len, ret, cookie, host->mrq);
+
+pio:
+	if (!desc) {
+		/* DMA failed, fall back to PIO */
+		if (ret >= 0)
+			ret = -EIO;
+		host->chan_tx = NULL;
+		dma_release_channel(chan);
+		/* Free the Rx channel too */
+		chan = host->chan_rx;
+		if (chan) {
+			host->chan_rx = NULL;
+			dma_release_channel(chan);
+		}
+		dev_warn(&host->pdev->dev,
+			 "DMA failed: %d, falling back to PIO\n", ret);
+		tmio_mmc_enable_dma(host, false);
+	}
+
+	dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d\n", __func__,
+		desc, cookie);
+}
+
+void tmio_mmc_start_dma(struct tmio_mmc_host *host,
+			       struct mmc_data *data)
+{
+	if (data->flags & MMC_DATA_READ) {
+		if (host->chan_rx)
+			tmio_mmc_start_dma_rx(host);
+	} else {
+		if (host->chan_tx)
+			tmio_mmc_start_dma_tx(host);
+	}
+}
+
+static void tmio_mmc_issue_tasklet_fn(unsigned long priv)
+{
+	struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
+	struct dma_chan *chan = NULL;
+
+	spin_lock_irq(&host->lock);
+
+	if (host && host->data) {
+		if (host->data->flags & MMC_DATA_READ)
+			chan = host->chan_rx;
+		else
+			chan = host->chan_tx;
+	}
+
+	spin_unlock_irq(&host->lock);
+
+	tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND);
+
+	if (chan)
+		dma_async_issue_pending(chan);
+}
+
+static void tmio_mmc_tasklet_fn(unsigned long arg)
+{
+	struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
+
+	spin_lock_irq(&host->lock);
+
+	if (!host->data)
+		goto out;
+
+	if (host->data->flags & MMC_DATA_READ)
+		dma_unmap_sg(host->chan_rx->device->dev,
+			     host->sg_ptr, host->sg_len,
+			     DMA_FROM_DEVICE);
+	else
+		dma_unmap_sg(host->chan_tx->device->dev,
+			     host->sg_ptr, host->sg_len,
+			     DMA_TO_DEVICE);
+
+	tmio_mmc_do_data_irq(host);
+out:
+	spin_unlock_irq(&host->lock);
+}
+
+/* It might be necessary to make filter MFD specific */
+static bool tmio_mmc_filter(struct dma_chan *chan, void *arg)
+{
+	dev_dbg(chan->device->dev, "%s: slave data %p\n", __func__, arg);
+	chan->private = arg;
+	return true;
+}
+
+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) {
+		dma_cap_mask_t mask;
+
+		dma_cap_zero(mask);
+		dma_cap_set(DMA_SLAVE, mask);
+
+		host->chan_tx = dma_request_channel(mask, tmio_mmc_filter,
+						    pdata->dma->chan_priv_tx);
+		dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
+			host->chan_tx);
+
+		if (!host->chan_tx)
+			return;
+
+		host->chan_rx = dma_request_channel(mask, tmio_mmc_filter,
+						    pdata->dma->chan_priv_rx);
+		dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
+			host->chan_rx);
+
+		if (!host->chan_rx)
+			goto ereqrx;
+
+		host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA);
+		if (!host->bounce_buf)
+			goto ebouncebuf;
+
+		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);
+
+		return;
+ebouncebuf:
+		dma_release_channel(host->chan_rx);
+		host->chan_rx = NULL;
+ereqrx:
+		dma_release_channel(host->chan_tx);
+		host->chan_tx = NULL;
+		return;
+	}
+}
+
+void tmio_mmc_release_dma(struct tmio_mmc_host *host)
+{
+	if (host->chan_tx) {
+		struct dma_chan *chan = host->chan_tx;
+		host->chan_tx = NULL;
+		dma_release_channel(chan);
+	}
+	if (host->chan_rx) {
+		struct dma_chan *chan = host->chan_rx;
+		host->chan_rx = NULL;
+		dma_release_channel(chan);
+	}
+	if (host->bounce_buf) {
+		free_pages((unsigned long)host->bounce_buf, 0);
+		host->bounce_buf = NULL;
+	}
+}
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
new file mode 100644
index 000000000000..6ae8d2f00ec7
--- /dev/null
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -0,0 +1,897 @@
+/*
+ * linux/drivers/mmc/host/tmio_mmc_pio.c
+ *
+ * Copyright (C) 2011 Guennadi Liakhovetski
+ * Copyright (C) 2007 Ian Molton
+ * Copyright (C) 2004 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Driver for the MMC / SD / SDIO IP found in:
+ *
+ * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
+ *
+ * This driver draws mainly on scattered spec sheets, Reverse engineering
+ * of the toshiba e800  SD driver and some parts of the 2.4 ASIC3 driver (4 bit
+ * support). (Further 4 bit support from a later datasheet).
+ *
+ * TODO:
+ *   Investigate using a workqueue for PIO transfers
+ *   Eliminate FIXMEs
+ *   SDIO support
+ *   Better Power management
+ *   Handle MMC errors better
+ *   double buffer support
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/highmem.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/tmio.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <linux/platform_device.h>
+#include <linux/scatterlist.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+
+#include "tmio_mmc.h"
+
+static u16 sd_ctrl_read16(struct tmio_mmc_host *host, int addr)
+{
+	return readw(host->ctl + (addr << host->bus_shift));
+}
+
+static void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
+		u16 *buf, int count)
+{
+	readsw(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
+static u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
+{
+	return readw(host->ctl + (addr << host->bus_shift)) |
+	       readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
+}
+
+static void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
+{
+	writew(val, host->ctl + (addr << host->bus_shift));
+}
+
+static void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
+		u16 *buf, int count)
+{
+	writesw(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
+static void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
+{
+	writew(val, host->ctl + (addr << host->bus_shift));
+	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
+}
+
+void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
+{
+	u32 mask = sd_ctrl_read32(host, CTL_IRQ_MASK) & ~(i & TMIO_MASK_IRQ);
+	sd_ctrl_write32(host, CTL_IRQ_MASK, mask);
+}
+
+void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
+{
+	u32 mask = sd_ctrl_read32(host, CTL_IRQ_MASK) | (i & TMIO_MASK_IRQ);
+	sd_ctrl_write32(host, CTL_IRQ_MASK, mask);
+}
+
+static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
+{
+	sd_ctrl_write32(host, CTL_STATUS, ~i);
+}
+
+static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
+{
+	host->sg_len = data->sg_len;
+	host->sg_ptr = data->sg;
+	host->sg_orig = data->sg;
+	host->sg_off = 0;
+}
+
+static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
+{
+	host->sg_ptr = sg_next(host->sg_ptr);
+	host->sg_off = 0;
+	return --host->sg_len;
+}
+
+#ifdef CONFIG_MMC_DEBUG
+
+#define STATUS_TO_TEXT(a, status, i) \
+	do { \
+		if (status & TMIO_STAT_##a) { \
+			if (i++) \
+				printk(" | "); \
+			printk(#a); \
+		} \
+	} while (0)
+
+static void pr_debug_status(u32 status)
+{
+	int i = 0;
+	printk(KERN_DEBUG "status: %08x = ", status);
+	STATUS_TO_TEXT(CARD_REMOVE, status, i);
+	STATUS_TO_TEXT(CARD_INSERT, status, i);
+	STATUS_TO_TEXT(SIGSTATE, status, i);
+	STATUS_TO_TEXT(WRPROTECT, status, i);
+	STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
+	STATUS_TO_TEXT(CARD_INSERT_A, status, i);
+	STATUS_TO_TEXT(SIGSTATE_A, status, i);
+	STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
+	STATUS_TO_TEXT(STOPBIT_ERR, status, i);
+	STATUS_TO_TEXT(ILL_FUNC, status, i);
+	STATUS_TO_TEXT(CMD_BUSY, status, i);
+	STATUS_TO_TEXT(CMDRESPEND, status, i);
+	STATUS_TO_TEXT(DATAEND, status, i);
+	STATUS_TO_TEXT(CRCFAIL, status, i);
+	STATUS_TO_TEXT(DATATIMEOUT, status, i);
+	STATUS_TO_TEXT(CMDTIMEOUT, status, i);
+	STATUS_TO_TEXT(RXOVERFLOW, status, i);
+	STATUS_TO_TEXT(TXUNDERRUN, status, i);
+	STATUS_TO_TEXT(RXRDY, status, i);
+	STATUS_TO_TEXT(TXRQ, status, i);
+	STATUS_TO_TEXT(ILL_ACCESS, status, i);
+	printk("\n");
+}
+
+#else
+#define pr_debug_status(s)  do { } while (0)
+#endif
+
+static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	if (enable) {
+		host->sdio_irq_enabled = 1;
+		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
+		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK,
+			(TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ));
+	} else {
+		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, TMIO_SDIO_MASK_ALL);
+		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
+		host->sdio_irq_enabled = 0;
+	}
+}
+
+static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock)
+{
+	u32 clk = 0, clock;
+
+	if (new_clock) {
+		for (clock = host->mmc->f_min, clk = 0x80000080;
+			new_clock >= (clock<<1); clk >>= 1)
+			clock <<= 1;
+		clk |= 0x100;
+	}
+
+	if (host->set_clk_div)
+		host->set_clk_div(host->pdev, (clk>>22) & 1);
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
+}
+
+static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
+{
+	struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
+
+	/* implicit BUG_ON(!res) */
+	if (resource_size(res) > 0x100) {
+		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
+		msleep(10);
+	}
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
+		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	msleep(10);
+}
+
+static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
+{
+	struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
+		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	msleep(10);
+
+	/* implicit BUG_ON(!res) */
+	if (resource_size(res) > 0x100) {
+		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
+		msleep(10);
+	}
+}
+
+static void tmio_mmc_reset(struct tmio_mmc_host *host)
+{
+	struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
+
+	/* FIXME - should we set stop clock reg here */
+	sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
+	/* implicit BUG_ON(!res) */
+	if (resource_size(res) > 0x100)
+		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
+	msleep(10);
+	sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
+	if (resource_size(res) > 0x100)
+		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
+	msleep(10);
+}
+
+static void tmio_mmc_reset_work(struct work_struct *work)
+{
+	struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
+						  delayed_reset_work.work);
+	struct mmc_request *mrq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	mrq = host->mrq;
+
+	/* request already finished */
+	if (!mrq
+	    || time_is_after_jiffies(host->last_req_ts +
+		msecs_to_jiffies(2000))) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		return;
+	}
+
+	dev_warn(&host->pdev->dev,
+		"timeout waiting for hardware interrupt (CMD%u)\n",
+		mrq->cmd->opcode);
+
+	if (host->data)
+		host->data->error = -ETIMEDOUT;
+	else if (host->cmd)
+		host->cmd->error = -ETIMEDOUT;
+	else
+		mrq->cmd->error = -ETIMEDOUT;
+
+	host->cmd = NULL;
+	host->data = NULL;
+	host->mrq = NULL;
+	host->force_pio = false;
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	tmio_mmc_reset(host);
+
+	mmc_request_done(host->mmc, mrq);
+}
+
+static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
+{
+	struct mmc_request *mrq = host->mrq;
+
+	if (!mrq)
+		return;
+
+	host->mrq = NULL;
+	host->cmd = NULL;
+	host->data = NULL;
+	host->force_pio = false;
+
+	cancel_delayed_work(&host->delayed_reset_work);
+
+	mmc_request_done(host->mmc, mrq);
+}
+
+/* These are the bitmasks the tmio chip requires to implement the MMC response
+ * types. Note that R1 and R6 are the same in this scheme. */
+#define APP_CMD        0x0040
+#define RESP_NONE      0x0300
+#define RESP_R1        0x0400
+#define RESP_R1B       0x0500
+#define RESP_R2        0x0600
+#define RESP_R3        0x0700
+#define DATA_PRESENT   0x0800
+#define TRANSFER_READ  0x1000
+#define TRANSFER_MULTI 0x2000
+#define SECURITY_CMD   0x4000
+
+static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
+{
+	struct mmc_data *data = host->data;
+	int c = cmd->opcode;
+
+	/* Command 12 is handled by hardware */
+	if (cmd->opcode == 12 && !cmd->arg) {
+		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
+		return 0;
+	}
+
+	switch (mmc_resp_type(cmd)) {
+	case MMC_RSP_NONE: c |= RESP_NONE; break;
+	case MMC_RSP_R1:   c |= RESP_R1;   break;
+	case MMC_RSP_R1B:  c |= RESP_R1B;  break;
+	case MMC_RSP_R2:   c |= RESP_R2;   break;
+	case MMC_RSP_R3:   c |= RESP_R3;   break;
+	default:
+		pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
+		return -EINVAL;
+	}
+
+	host->cmd = cmd;
+
+/* FIXME - this seems to be ok commented out but the spec suggest this bit
+ *         should be set when issuing app commands.
+ *	if(cmd->flags & MMC_FLAG_ACMD)
+ *		c |= APP_CMD;
+ */
+	if (data) {
+		c |= DATA_PRESENT;
+		if (data->blocks > 1) {
+			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
+			c |= TRANSFER_MULTI;
+		}
+		if (data->flags & MMC_DATA_READ)
+			c |= TRANSFER_READ;
+	}
+
+	tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_CMD);
+
+	/* Fire off the command */
+	sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
+	sd_ctrl_write16(host, CTL_SD_CMD, c);
+
+	return 0;
+}
+
+/*
+ * This chip always returns (at least?) as much data as you ask for.
+ * I'm unsure what happens if you ask for less than a block. This should be
+ * looked into to ensure that a funny length read doesnt hose the controller.
+ */
+static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
+{
+	struct mmc_data *data = host->data;
+	void *sg_virt;
+	unsigned short *buf;
+	unsigned int count;
+	unsigned long flags;
+
+	if ((host->chan_tx || host->chan_rx) && !host->force_pio) {
+		pr_err("PIO IRQ in DMA mode!\n");
+		return;
+	} else if (!data) {
+		pr_debug("Spurious PIO IRQ\n");
+		return;
+	}
+
+	sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
+	buf = (unsigned short *)(sg_virt + host->sg_off);
+
+	count = host->sg_ptr->length - host->sg_off;
+	if (count > data->blksz)
+		count = data->blksz;
+
+	pr_debug("count: %08x offset: %08x flags %08x\n",
+		 count, host->sg_off, data->flags);
+
+	/* Transfer the data */
+	if (data->flags & MMC_DATA_READ)
+		sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+	else
+		sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+
+	host->sg_off += count;
+
+	tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
+
+	if (host->sg_off == host->sg_ptr->length)
+		tmio_mmc_next_sg(host);
+
+	return;
+}
+
+static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
+{
+	if (host->sg_ptr == &host->bounce_sg) {
+		unsigned long flags;
+		void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
+		memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
+		tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
+	}
+}
+
+/* needs to be called with host->lock held */
+void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
+{
+	struct mmc_data *data = host->data;
+	struct mmc_command *stop;
+
+	host->data = NULL;
+
+	if (!data) {
+		dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
+		return;
+	}
+	stop = data->stop;
+
+	/* FIXME - return correct transfer count on errors */
+	if (!data->error)
+		data->bytes_xfered = data->blocks * data->blksz;
+	else
+		data->bytes_xfered = 0;
+
+	pr_debug("Completed data request\n");
+
+	/*
+	 * FIXME: other drivers allow an optional stop command of any given type
+	 *        which we dont do, as the chip can auto generate them.
+	 *        Perhaps we can be smarter about when to use auto CMD12 and
+	 *        only issue the auto request when we know this is the desired
+	 *        stop command, allowing fallback to the stop command the
+	 *        upper layers expect. For now, we do what works.
+	 */
+
+	if (data->flags & MMC_DATA_READ) {
+		if (host->chan_rx && !host->force_pio)
+			tmio_mmc_check_bounce_buffer(host);
+		dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
+			host->mrq);
+	} else {
+		dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
+			host->mrq);
+	}
+
+	if (stop) {
+		if (stop->opcode == 12 && !stop->arg)
+			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
+		else
+			BUG();
+	}
+
+	tmio_mmc_finish_request(host);
+}
+
+static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
+{
+	struct mmc_data *data;
+	spin_lock(&host->lock);
+	data = host->data;
+
+	if (!data)
+		goto out;
+
+	if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
+		/*
+		 * Has all data been written out yet? Testing on SuperH showed,
+		 * that in most cases the first interrupt comes already with the
+		 * BUSY status bit clear, but on some operations, like mount or
+		 * in the beginning of a write / sync / umount, there is one
+		 * DATAEND interrupt with the BUSY bit set, in this cases
+		 * waiting for one more interrupt fixes the problem.
+		 */
+		if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) {
+			tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
+			tasklet_schedule(&host->dma_complete);
+		}
+	} else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
+		tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
+		tasklet_schedule(&host->dma_complete);
+	} else {
+		tmio_mmc_do_data_irq(host);
+		tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
+	}
+out:
+	spin_unlock(&host->lock);
+}
+
+static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
+	unsigned int stat)
+{
+	struct mmc_command *cmd = host->cmd;
+	int i, addr;
+
+	spin_lock(&host->lock);
+
+	if (!host->cmd) {
+		pr_debug("Spurious CMD irq\n");
+		goto out;
+	}
+
+	host->cmd = NULL;
+
+	/* This controller is sicker than the PXA one. Not only do we need to
+	 * drop the top 8 bits of the first response word, we also need to
+	 * modify the order of the response for short response command types.
+	 */
+
+	for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
+		cmd->resp[i] = sd_ctrl_read32(host, addr);
+
+	if (cmd->flags &  MMC_RSP_136) {
+		cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
+		cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
+		cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
+		cmd->resp[3] <<= 8;
+	} else if (cmd->flags & MMC_RSP_R3) {
+		cmd->resp[0] = cmd->resp[3];
+	}
+
+	if (stat & TMIO_STAT_CMDTIMEOUT)
+		cmd->error = -ETIMEDOUT;
+	else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
+		cmd->error = -EILSEQ;
+
+	/* If there is data to handle we enable data IRQs here, and
+	 * we will ultimatley finish the request in the data_end handler.
+	 * If theres no data or we encountered an error, finish now.
+	 */
+	if (host->data && !cmd->error) {
+		if (host->data->flags & MMC_DATA_READ) {
+			if (host->force_pio || !host->chan_rx)
+				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
+			else
+				tasklet_schedule(&host->dma_issue);
+		} else {
+			if (host->force_pio || !host->chan_tx)
+				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
+			else
+				tasklet_schedule(&host->dma_issue);
+		}
+	} else {
+		tmio_mmc_finish_request(host);
+	}
+
+out:
+	spin_unlock(&host->lock);
+}
+
+static irqreturn_t tmio_mmc_irq(int irq, void *devid)
+{
+	struct tmio_mmc_host *host = devid;
+	struct tmio_mmc_data *pdata = host->pdata;
+	unsigned int ireg, irq_mask, status;
+	unsigned int sdio_ireg, sdio_irq_mask, sdio_status;
+
+	pr_debug("MMC IRQ begin\n");
+
+	status = sd_ctrl_read32(host, CTL_STATUS);
+	irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
+	ireg = status & TMIO_MASK_IRQ & ~irq_mask;
+
+	sdio_ireg = 0;
+	if (!ireg && pdata->flags & TMIO_MMC_SDIO_IRQ) {
+		sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
+		sdio_irq_mask = sd_ctrl_read16(host, CTL_SDIO_IRQ_MASK);
+		sdio_ireg = sdio_status & TMIO_SDIO_MASK_ALL & ~sdio_irq_mask;
+
+		sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status & ~TMIO_SDIO_MASK_ALL);
+
+		if (sdio_ireg && !host->sdio_irq_enabled) {
+			pr_warning("tmio_mmc: Spurious SDIO IRQ, disabling! 0x%04x 0x%04x 0x%04x\n",
+				   sdio_status, sdio_irq_mask, sdio_ireg);
+			tmio_mmc_enable_sdio_irq(host->mmc, 0);
+			goto out;
+		}
+
+		if (host->mmc->caps & MMC_CAP_SDIO_IRQ &&
+			sdio_ireg & TMIO_SDIO_STAT_IOIRQ)
+			mmc_signal_sdio_irq(host->mmc);
+
+		if (sdio_ireg)
+			goto out;
+	}
+
+	pr_debug_status(status);
+	pr_debug_status(ireg);
+
+	if (!ireg) {
+		tmio_mmc_disable_mmc_irqs(host, status & ~irq_mask);
+
+		pr_warning("tmio_mmc: Spurious irq, disabling! "
+			"0x%08x 0x%08x 0x%08x\n", status, irq_mask, ireg);
+		pr_debug_status(status);
+
+		goto out;
+	}
+
+	while (ireg) {
+		/* Card insert / remove attempts */
+		if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
+			tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
+				TMIO_STAT_CARD_REMOVE);
+			mmc_detect_change(host->mmc, msecs_to_jiffies(100));
+		}
+
+		/* CRC and other errors */
+/*		if (ireg & TMIO_STAT_ERR_IRQ)
+ *			handled |= tmio_error_irq(host, irq, stat);
+ */
+
+		/* Command completion */
+		if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
+			tmio_mmc_ack_mmc_irqs(host,
+				     TMIO_STAT_CMDRESPEND |
+				     TMIO_STAT_CMDTIMEOUT);
+			tmio_mmc_cmd_irq(host, status);
+		}
+
+		/* Data transfer */
+		if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
+			tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
+			tmio_mmc_pio_irq(host);
+		}
+
+		/* Data transfer completion */
+		if (ireg & TMIO_STAT_DATAEND) {
+			tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
+			tmio_mmc_data_irq(host);
+		}
+
+		/* Check status - keep going until we've handled it all */
+		status = sd_ctrl_read32(host, CTL_STATUS);
+		irq_mask = sd_ctrl_read32(host, CTL_IRQ_MASK);
+		ireg = status & TMIO_MASK_IRQ & ~irq_mask;
+
+		pr_debug("Status at end of loop: %08x\n", status);
+		pr_debug_status(status);
+	}
+	pr_debug("MMC IRQ end\n");
+
+out:
+	return IRQ_HANDLED;
+}
+
+static int tmio_mmc_start_data(struct tmio_mmc_host *host,
+	struct mmc_data *data)
+{
+	struct tmio_mmc_data *pdata = host->pdata;
+
+	pr_debug("setup data transfer: blocksize %08x  nr_blocks %d\n",
+		 data->blksz, data->blocks);
+
+	/* Some hardware cannot perform 2 byte requests in 4 bit mode */
+	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
+		int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
+
+		if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
+			pr_err("%s: %d byte block unsupported in 4 bit mode\n",
+			       mmc_hostname(host->mmc), data->blksz);
+			return -EINVAL;
+		}
+	}
+
+	tmio_mmc_init_sg(host, data);
+	host->data = data;
+
+	/* Set transfer length / blocksize */
+	sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
+	sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
+
+	tmio_mmc_start_dma(host, data);
+
+	return 0;
+}
+
+/* Process requests from the MMC layer */
+static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	int ret;
+
+	if (host->mrq)
+		pr_debug("request not null\n");
+
+	host->last_req_ts = jiffies;
+	wmb();
+	host->mrq = mrq;
+
+	if (mrq->data) {
+		ret = tmio_mmc_start_data(host, mrq->data);
+		if (ret)
+			goto fail;
+	}
+
+	ret = tmio_mmc_start_command(host, mrq->cmd);
+	if (!ret) {
+		schedule_delayed_work(&host->delayed_reset_work,
+				      msecs_to_jiffies(2000));
+		return;
+	}
+
+fail:
+	host->mrq = NULL;
+	host->force_pio = false;
+	mrq->cmd->error = ret;
+	mmc_request_done(mmc, mrq);
+}
+
+/* Set MMC clock / power.
+ * Note: This controller uses a simple divider scheme therefore it cannot
+ * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
+ * MMC wont run that fast, it has to be clocked at 12MHz which is the next
+ * slowest setting.
+ */
+static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	if (ios->clock)
+		tmio_mmc_set_clock(host, ios->clock);
+
+	/* Power sequence - OFF -> UP -> ON */
+	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);
+		tmio_mmc_clk_stop(host);
+	} else if (ios->power_mode == MMC_POWER_UP) {
+		/* power up SD bus */
+		if (host->set_pwr)
+			host->set_pwr(host->pdev, 1);
+	} else {
+		/* start bus clock */
+		tmio_mmc_clk_start(host);
+	}
+
+	switch (ios->bus_width) {
+	case MMC_BUS_WIDTH_1:
+		sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
+	break;
+	case MMC_BUS_WIDTH_4:
+		sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
+	break;
+	}
+
+	/* Let things settle. delay taken from winCE driver */
+	udelay(140);
+}
+
+static int tmio_mmc_get_ro(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct tmio_mmc_data *pdata = host->pdata;
+
+	return ((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
+		!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
+}
+
+static int tmio_mmc_get_cd(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct tmio_mmc_data *pdata = host->pdata;
+
+	if (!pdata->get_cd)
+		return -ENOSYS;
+	else
+		return pdata->get_cd(host->pdev);
+}
+
+static const struct mmc_host_ops tmio_mmc_ops = {
+	.request	= tmio_mmc_request,
+	.set_ios	= tmio_mmc_set_ios,
+	.get_ro         = tmio_mmc_get_ro,
+	.get_cd		= tmio_mmc_get_cd,
+	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
+};
+
+int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host,
+				  struct platform_device *pdev,
+				  struct tmio_mmc_data *pdata)
+{
+	struct tmio_mmc_host *_host;
+	struct mmc_host *mmc;
+	struct resource *res_ctl;
+	int ret;
+	u32 irq_mask = TMIO_MASK_CMD;
+
+	res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res_ctl)
+		return -EINVAL;
+
+	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
+	if (!mmc)
+		return -ENOMEM;
+
+	_host = mmc_priv(mmc);
+	_host->pdata = pdata;
+	_host->mmc = mmc;
+	_host->pdev = pdev;
+	platform_set_drvdata(pdev, mmc);
+
+	_host->set_pwr = pdata->set_pwr;
+	_host->set_clk_div = pdata->set_clk_div;
+
+	/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
+	_host->bus_shift = resource_size(res_ctl) >> 10;
+
+	_host->ctl = ioremap(res_ctl->start, resource_size(res_ctl));
+	if (!_host->ctl) {
+		ret = -ENOMEM;
+		goto host_free;
+	}
+
+	mmc->ops = &tmio_mmc_ops;
+	mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities;
+	mmc->f_max = pdata->hclk;
+	mmc->f_min = mmc->f_max / 512;
+	mmc->max_segs = 32;
+	mmc->max_blk_size = 512;
+	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
+		mmc->max_segs;
+	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+	mmc->max_seg_size = mmc->max_req_size;
+	if (pdata->ocr_mask)
+		mmc->ocr_avail = pdata->ocr_mask;
+	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);
+	if (ret < 0)
+		goto unmap_ctl;
+
+	_host->irq = ret;
+
+	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 */
+	INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
+
+	/* See if we also get DMA */
+	tmio_mmc_request_dma(_host, pdata);
+
+	mmc_add_host(mmc);
+
+	/* Unmask the IRQs we want to know about */
+	if (!_host->chan_rx)
+		irq_mask |= TMIO_MASK_READOP;
+	if (!_host->chan_tx)
+		irq_mask |= TMIO_MASK_WRITEOP;
+
+	tmio_mmc_enable_mmc_irqs(_host, irq_mask);
+
+	*host = _host;
+
+	return 0;
+
+unmap_ctl:
+	iounmap(_host->ctl);
+host_free:
+	mmc_free_host(mmc);
+
+	return ret;
+}
+EXPORT_SYMBOL(tmio_mmc_host_probe);
+
+void tmio_mmc_host_remove(struct tmio_mmc_host *host)
+{
+	mmc_remove_host(host->mmc);
+	cancel_delayed_work_sync(&host->delayed_reset_work);
+	tmio_mmc_release_dma(host);
+	free_irq(host->irq, host);
+	iounmap(host->ctl);
+	mmc_free_host(host->mmc);
+}
+EXPORT_SYMBOL(tmio_mmc_host_remove);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/via-sdmmc.c b/drivers/mmc/host/via-sdmmc.c
index 8c5b4881ccd6..4dfe2c02ea91 100644
--- a/drivers/mmc/host/via-sdmmc.c
+++ b/drivers/mmc/host/via-sdmmc.c
@@ -1087,14 +1087,13 @@ static int __devinit via_sd_probe(struct pci_dev *pcidev,
 	struct mmc_host *mmc;
 	struct via_crdr_mmc_host *sdhost;
 	u32 base, len;
-	u8 rev, gatt;
+	u8  gatt;
 	int ret;
 
-	pci_read_config_byte(pcidev, PCI_CLASS_REVISION, &rev);
 	pr_info(DRV_NAME
 		": VIA SDMMC controller found at %s [%04x:%04x] (rev %x)\n",
 		pci_name(pcidev), (int)pcidev->vendor, (int)pcidev->device,
-		(int)rev);
+		(int)pcidev->revision);
 
 	ret = pci_enable_device(pcidev);
 	if (ret)
author	Linus Torvalds	2011-03-29 12:09:30 -0700
committer	Linus Torvalds	2011-03-29 12:09:30 -0700
commit	6b2a4f7a5b777ea8fcf3bb38a0a33e68a920a9dc (patch)
tree	fcf7d9bddc31974ad046aecd51cc856c68e14cdd /drivers/mmc
parent	eefbab599531240adaffa1d23900afbc8b0342bd (diff)
parent	022b483596fabb5d1320aa4b76f43a754063f37e (diff)