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

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/drzeus/mmc: (24 commits)
  MMC: Use timeout values from CSR
  MMC: CSD and CID timeout values
  sdhci: 'scratch' may be used uninitialized
  mmc: explicitly mention SDIO support in Kconfig
  mmc: remove redundant "depends on"
  Fix comment in include/linux/mmc/host.h
  sdio: high-speed support
  mmc_block: hard code 512 byte block size
  sdhci: force high speed capability on some controllers
  mmc_block: filter out PC requests
  mmc_block: indicate strict ordering
  mmc_block: inform block layer about sector count restriction
  sdio: give sdio irq thread a host specific name
  sdio: make sleep on error interruptable
  sdhci: reduce card detection delay
  sdhci: let the controller wait for busy state to end
  atmel-mci: Add missing flush_dcache_page() in PIO transfer code
  atmel-mci: Don't overwrite error bits when NOTBUSY is set
  atmel-mci: Add experimental DMA support
  atmel-mci: support multiple mmc slots
  ...

arch/avr32/boards/atngw100/setup.c

@@ -53,8 +53,11 @@ static struct spi_board_info spi0_board_info[] __initdata = {
 };
 
 static struct mci_platform_data __initdata mci0_data = {
+	.slot[0] = {
+		.bus_width	= 4,
 		.detect_pin	= GPIO_PIN_PC(25),
 		.wp_pin		= GPIO_PIN_PE(0),
+	},
 };
 
 /*

arch/avr32/boards/atstk1000/atstk1002.c

@@ -264,16 +264,20 @@ void __init setup_board(void)
 
 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
 
+static struct mci_platform_data __initdata mci0_data = {
+	.slot[0] = {
+		.bus_width	= 4,
+
 /* MMC card detect requires MACB0 *NOT* be used */
 #ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
-static struct mci_platform_data __initdata mci0_data = {
 		.detect_pin	= GPIO_PIN_PC(14), /* gpio30/sdcd */
 		.wp_pin		= GPIO_PIN_PC(15), /* gpio31/sdwp */
-};
-#define MCI_PDATA	&mci0_data
 #else
-#define MCI_PDATA	NULL
+		.detect_pin	= -ENODEV,
+		.wp_pin		= -ENODEV,
 #endif	/* SW6 for sd{cd,wp} routing */
+	},
+};
 
 #endif	/* SW2 for MMC signal routing */
 
@@ -326,7 +330,7 @@ static int __init atstk1002_init(void)
 	at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 #endif
 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
-	at32_add_device_mci(0, MCI_PDATA);
+	at32_add_device_mci(0, &mci0_pdata);
 #endif
 #ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
 	set_hw_addr(at32_add_device_eth(1, &eth_data[1]));

arch/avr32/boards/atstk1000/atstk1003.c

@@ -66,6 +66,16 @@ static struct spi_board_info spi1_board_info[] __initdata = { {
 } };
 #endif
 
+#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
+static struct mci_platform_data __initdata mci0_data = {
+	.slot[0] = {
+		.bus_width	= 4,
+		.detect_pin	= -ENODEV,
+		.wp_pin		= -ENODEV,
+	},
+};
+#endif
+
 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 static void __init atstk1003_setup_extdac(void)
 {
@@ -154,7 +164,7 @@ static int __init atstk1003_init(void)
 	at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 #endif
 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
-	at32_add_device_mci(0, NULL);
+	at32_add_device_mci(0, &mci0_data);
 #endif
 	at32_add_device_usba(0, NULL);
 #ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM

arch/avr32/boards/atstk1000/atstk1004.c

@@ -71,6 +71,16 @@ static struct spi_board_info spi1_board_info[] __initdata = { {
 } };
 #endif
 
+#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
+static struct mci_platform_data __initdata mci0_data = {
+	.slot[0] = {
+		.bus_width	= 4,
+		.detect_pin	= -ENODEV,
+		.wp_pin		= -ENODEV,
+	},
+};
+#endif
+
 #ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
 static void __init atstk1004_setup_extdac(void)
 {
@@ -137,7 +147,7 @@ static int __init atstk1004_init(void)
 	at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
 #endif
 #ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
-	at32_add_device_mci(0, NULL);
+	at32_add_device_mci(0, &mci0_data);
 #endif
 	at32_add_device_lcdc(0, &atstk1000_lcdc_data,
 			     fbmem_start, fbmem_size, 0);

arch/avr32/include/asm/atmel-mci.h

 #ifndef __ASM_AVR32_ATMEL_MCI_H
 #define __ASM_AVR32_ATMEL_MCI_H
 
-struct mci_platform_data {
+#define ATMEL_MCI_MAX_NR_SLOTS	2
+
+struct dma_slave;
+
+/**
+ * struct mci_slot_pdata - board-specific per-slot configuration
+ * @bus_width: Number of data lines wired up the slot
+ * @detect_pin: GPIO pin wired to the card detect switch
+ * @wp_pin: GPIO pin wired to the write protect sensor
+ *
+ * If a given slot is not present on the board, @bus_width should be
+ * set to 0. The other fields are ignored in this case.
+ *
+ * Any pins that aren't available should be set to a negative value.
+ *
+ * Note that support for multiple slots is experimental -- some cards
+ * might get upset if we don't get the clock management exactly right.
+ * But in most cases, it should work just fine.
+ */
+struct mci_slot_pdata {
+	unsigned int		bus_width;
 	int			detect_pin;
 	int			wp_pin;
 };
 
+/**
+ * struct mci_platform_data - board-specific MMC/SDcard configuration
+ * @dma_slave: DMA slave interface to use in data transfers, or NULL.
+ * @slot: Per-slot configuration data.
+ */
+struct mci_platform_data {
+	struct dma_slave	*dma_slave;
+	struct mci_slot_pdata	slot[ATMEL_MCI_MAX_NR_SLOTS];
+};
+
 #endif /* __ASM_AVR32_ATMEL_MCI_H */

arch/avr32/mach-at32ap/at32ap700x.c

@@ -1272,10 +1272,14 @@ static struct clk atmel_mci0_pclk = {
 struct platform_device *__init
 at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
 {
-	struct mci_platform_data	_data;
 	struct platform_device		*pdev;
+	struct dw_dma_slave		*dws;
 
-	if (id != 0)
+	if (id != 0 || !data)
+		return NULL;
+
+	/* Must have at least one usable slot */
+	if (!data->slot[0].bus_width && !data->slot[1].bus_width)
 		return NULL;
 
 	pdev = platform_device_alloc("atmel_mci", id);
@@ -1286,28 +1290,76 @@ at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
 				ARRAY_SIZE(atmel_mci0_resource)))
 		goto fail;
 
-	if (!data) {
-		data = &_data;
-		memset(data, -1, sizeof(struct mci_platform_data));
-		data->detect_pin = GPIO_PIN_NONE;
-		data->wp_pin = GPIO_PIN_NONE;
-	}
+	if (data->dma_slave)
+		dws = kmemdup(to_dw_dma_slave(data->dma_slave),
+				sizeof(struct dw_dma_slave), GFP_KERNEL);
+	else
+		dws = kzalloc(sizeof(struct dw_dma_slave), GFP_KERNEL);
+
+	dws->slave.dev = &pdev->dev;
+	dws->slave.dma_dev = &dw_dmac0_device.dev;
+	dws->slave.reg_width = DMA_SLAVE_WIDTH_32BIT;
+	dws->cfg_hi = (DWC_CFGH_SRC_PER(0)
+				| DWC_CFGH_DST_PER(1));
+	dws->cfg_lo &= ~(DWC_CFGL_HS_DST_POL
+				| DWC_CFGL_HS_SRC_POL);
+
+	data->dma_slave = &dws->slave;
 
 	if (platform_device_add_data(pdev, data,
 				sizeof(struct mci_platform_data)))
 		goto fail;
 
-	select_peripheral(PA(10), PERIPH_A, 0);	/* CLK	 */
-	select_peripheral(PA(11), PERIPH_A, 0);	/* CMD	 */
-	select_peripheral(PA(12), PERIPH_A, 0);	/* DATA0 */
+	/* CLK line is common to both slots */
+	select_peripheral(PA(10), PERIPH_A, 0);
+
+	switch (data->slot[0].bus_width) {
+	case 4:
 		select_peripheral(PA(13), PERIPH_A, 0);	/* DATA1 */
 		select_peripheral(PA(14), PERIPH_A, 0);	/* DATA2 */
 		select_peripheral(PA(15), PERIPH_A, 0);	/* DATA3 */
+		/* fall through */
+	case 1:
+		select_peripheral(PA(11), PERIPH_A, 0);	/* CMD	 */
+		select_peripheral(PA(12), PERIPH_A, 0);	/* DATA0 */
 
-	if (gpio_is_valid(data->detect_pin))
-		at32_select_gpio(data->detect_pin, 0);
-	if (gpio_is_valid(data->wp_pin))
-		at32_select_gpio(data->wp_pin, 0);
+		if (gpio_is_valid(data->slot[0].detect_pin))
+			at32_select_gpio(data->slot[0].detect_pin, 0);
+		if (gpio_is_valid(data->slot[0].wp_pin))
+			at32_select_gpio(data->slot[0].wp_pin, 0);
+		break;
+	case 0:
+		/* Slot is unused */
+		break;
+	default:
+		goto fail;
+	}
+
+	switch (data->slot[1].bus_width) {
+	case 4:
+		select_peripheral(PB(8),  PERIPH_B, 0);	/* DATA1 */
+		select_peripheral(PB(9),  PERIPH_B, 0);	/* DATA2 */
+		select_peripheral(PB(10), PERIPH_B, 0);	/* DATA3 */
+		/* fall through */
+	case 1:
+		select_peripheral(PB(6),  PERIPH_B, 0); /* CMD	 */
+		select_peripheral(PB(7),  PERIPH_B, 0); /* DATA0 */
+
+		if (gpio_is_valid(data->slot[1].detect_pin))
+			at32_select_gpio(data->slot[1].detect_pin, 0);
+		if (gpio_is_valid(data->slot[1].wp_pin))
+			at32_select_gpio(data->slot[1].wp_pin, 0);
+		break;
+	case 0:
+		/* Slot is unused */
+		break;
+	default:
+		if (!data->slot[0].bus_width)
+			goto fail;
+
+		data->slot[1].bus_width = 0;
+		break;
+	}
 
 	atmel_mci0_pclk.dev = &pdev->dev;
 

drivers/mmc/Kconfig

@@ -3,13 +3,14 @@
 #
 
 menuconfig MMC
-	tristate "MMC/SD card support"
+	tristate "MMC/SD/SDIO card support"
 	depends on HAS_IOMEM
 	help
-	  MMC is the "multi-media card" bus protocol.
+	  This selects MultiMediaCard, Secure Digital and Secure
+	  Digital I/O support.
 
-	  If you want MMC support, you should say Y here and also
-	  to the specific driver for your MMC interface.
+	  If you want MMC/SD/SDIO support, you should say Y here and
+	  also to your specific host controller driver.
 
 config MMC_DEBUG
 	bool "MMC debugging"

drivers/mmc/card/Kconfig

@@ -2,7 +2,7 @@
 # MMC/SD card drivers
 #
 
-comment "MMC/SD Card Drivers"
+comment "MMC/SD/SDIO Card Drivers"
 
 config MMC_BLOCK
 	tristate "MMC block device driver"
@@ -34,7 +34,6 @@ config MMC_BLOCK_BOUNCE
 
 config SDIO_UART
 	tristate "SDIO UART/GPS class support"
-	depends on MMC
 	help
 	  SDIO function driver for SDIO cards that implements the UART
 	  class, as well as the GPS class which appears like a UART.

drivers/mmc/card/block.c

@@ -58,7 +58,6 @@ struct mmc_blk_data {
 	struct mmc_queue queue;
 
 	unsigned int	usage;
-	unsigned int	block_bits;
 	unsigned int	read_only;
 };
 
@@ -216,8 +215,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 	struct mmc_blk_data *md = mq->data;
 	struct mmc_card *card = md->queue.card;
 	struct mmc_blk_request brq;
-	int ret = 1, data_size, i;
-	struct scatterlist *sg;
+	int ret = 1;
 
 	mmc_claim_host(card->host);
 
@@ -233,13 +231,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 		if (!mmc_card_blockaddr(card))
 			brq.cmd.arg <<= 9;
 		brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
-		brq.data.blksz = 1 << md->block_bits;
+		brq.data.blksz = 512;
 		brq.stop.opcode = MMC_STOP_TRANSMISSION;
 		brq.stop.arg = 0;
 		brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
-		brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
-		if (brq.data.blocks > card->host->max_blk_count)
-			brq.data.blocks = card->host->max_blk_count;
+		brq.data.blocks = req->nr_sectors;
 
 		if (brq.data.blocks > 1) {
 			/* SPI multiblock writes terminate using a special
@@ -271,24 +267,6 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 
 		mmc_queue_bounce_pre(mq);
 
-		/*
-		 * Adjust the sg list so it is the same size as the
-		 * request.
-		 */
-		if (brq.data.blocks !=
-		    (req->nr_sectors >> (md->block_bits - 9))) {
-			data_size = brq.data.blocks * brq.data.blksz;
-			for_each_sg(brq.data.sg, sg, brq.data.sg_len, i) {
-				data_size -= sg->length;
-				if (data_size <= 0) {
-					sg->length += data_size;
-					i++;
-					break;
-				}
-			}
-			brq.data.sg_len = i;
-		}
-
 		mmc_wait_for_req(card->host, &brq.mrq);
 
 		mmc_queue_bounce_post(mq);
@@ -373,16 +351,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 	if (rq_data_dir(req) != READ) {
 		if (mmc_card_sd(card)) {
 			u32 blocks;
-			unsigned int bytes;
 
 			blocks = mmc_sd_num_wr_blocks(card);
 			if (blocks != (u32)-1) {
-				if (card->csd.write_partial)
-					bytes = blocks << md->block_bits;
-				else
-					bytes = blocks << 9;
 				spin_lock_irq(&md->lock);
-				ret = __blk_end_request(req, 0, bytes);
+				ret = __blk_end_request(req, 0, blocks << 9);
 				spin_unlock_irq(&md->lock);
 			}
 		} else {
@@ -432,13 +405,6 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 	 */
 	md->read_only = mmc_blk_readonly(card);
 
-	/*
-	 * Both SD and MMC specifications state (although a bit
-	 * unclearly in the MMC case) that a block size of 512
-	 * bytes must always be supported by the card.
-	 */
-	md->block_bits = 9;
-
 	md->disk = alloc_disk(1 << MMC_SHIFT);
 	if (md->disk == NULL) {
 		ret = -ENOMEM;
@@ -476,7 +442,7 @@ static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
 
 	sprintf(md->disk->disk_name, "mmcblk%d", devidx);
 
-	blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
+	blk_queue_hardsect_size(md->queue.queue, 512);
 
 	if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
 		/*
@@ -514,7 +480,7 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
 
 	mmc_claim_host(card->host);
 	cmd.opcode = MMC_SET_BLOCKLEN;
-	cmd.arg = 1 << md->block_bits;
+	cmd.arg = 512;
 	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
 	err = mmc_wait_for_cmd(card->host, &cmd, 5);
 	mmc_release_host(card->host);

drivers/mmc/card/queue.c

@@ -31,7 +31,7 @@ static int mmc_prep_request(struct request_queue *q, struct request *req)
 	/*
 	 * We only like normal block requests.
 	 */
-	if (!blk_fs_request(req) && !blk_pc_request(req)) {
+	if (!blk_fs_request(req)) {
 		blk_dump_rq_flags(req, "MMC bad request");
 		return BLKPREP_KILL;
 	}
@@ -131,6 +131,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 	mq->req = NULL;
 
 	blk_queue_prep_rq(mq->queue, mmc_prep_request);
+	blk_queue_ordered(mq->queue, QUEUE_ORDERED_DRAIN, NULL);
 
 #ifdef CONFIG_MMC_BLOCK_BOUNCE
 	if (host->max_hw_segs == 1) {
@@ -142,12 +143,19 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 			bouncesz = host->max_req_size;
 		if (bouncesz > host->max_seg_size)
 			bouncesz = host->max_seg_size;
+		if (bouncesz > (host->max_blk_count * 512))
+			bouncesz = host->max_blk_count * 512;
 
+		if (bouncesz > 512) {
 			mq->bounce_buf = kmalloc(bouncesz, GFP_KERNEL);
 			if (!mq->bounce_buf) {
-			printk(KERN_WARNING "%s: unable to allocate "
-				"bounce buffer\n", mmc_card_name(card));
-		} else {
+				printk(KERN_WARNING "%s: unable to "
+					"allocate bounce buffer\n",
+					mmc_card_name(card));
+			}
+		}
+
+		if (mq->bounce_buf) {
 			blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY);
 			blk_queue_max_sectors(mq->queue, bouncesz / 512);
 			blk_queue_max_phys_segments(mq->queue, bouncesz / 512);
@@ -175,7 +183,8 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock
 
 	if (!mq->bounce_buf) {
 		blk_queue_bounce_limit(mq->queue, limit);
-		blk_queue_max_sectors(mq->queue, host->max_req_size / 512);
+		blk_queue_max_sectors(mq->queue,
+			min(host->max_blk_count, host->max_req_size / 512));
 		blk_queue_max_phys_segments(mq->queue, host->max_phys_segs);
 		blk_queue_max_hw_segments(mq->queue, host->max_hw_segs);
 		blk_queue_max_segment_size(mq->queue, host->max_seg_size);

drivers/mmc/core/mmc_ops.c

@@ -248,8 +248,12 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
 
 	sg_init_one(&sg, data_buf, len);
 
-	if (card)
-		mmc_set_data_timeout(&data, card);
+	/*
+	 * The spec states that CSR and CID accesses have a timeout
+	 * of 64 clock cycles.
+	 */
+	data.timeout_ns = 0;
+	data.timeout_clks = 64;
 
 	mmc_wait_for_req(host, &mrq);
 

drivers/mmc/core/sdio.c

@@ -164,6 +164,36 @@ static int sdio_enable_wide(struct mmc_card *card)
 	return 0;
 }
 
+/*
+ * Test if the card supports high-speed mode and, if so, switch to it.
+ */
+static int sdio_enable_hs(struct mmc_card *card)
+{
+	int ret;
+	u8 speed;
+
+	if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
+		return 0;
+
+	if (!card->cccr.high_speed)
+		return 0;
+
+	ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
+	if (ret)
+		return ret;
+
+	speed |= SDIO_SPEED_EHS;
+
+	ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
+	if (ret)
+		return ret;
+
+	mmc_card_set_highspeed(card);
+	mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+
+	return 0;
+}
+
 /*
  * Host is being removed. Free up the current card.
  */
@@ -333,10 +363,26 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
 		goto remove;
 
 	/*
-	 * No support for high-speed yet, so just set
-	 * the card's maximum speed.
+	 * Switch to high-speed (if supported).
+	 */
+	err = sdio_enable_hs(card);
+	if (err)
+		goto remove;
+
+	/*
+	 * Change to the card's maximum speed.
 	 */
+	if (mmc_card_highspeed(card)) {
+		/*
+		 * The SDIO specification doesn't mention how
+		 * the CIS transfer speed register relates to
+		 * high-speed, but it seems that 50 MHz is
+		 * mandatory.
+		 */
+		mmc_set_clock(host, 50000000);
+	} else {
 		mmc_set_clock(host, card->cis.max_dtr);
+	}
 
 	/*
 	 * Switch to wider bus (if supported).

drivers/mmc/core/sdio_irq.c

@@ -5,6 +5,8 @@
  * Created:     June 18, 2007
  * Copyright:   MontaVista Software Inc.
  *
+ * Copyright 2008 Pierre Ossman
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or (at
@@ -107,11 +109,14 @@ static int sdio_irq_thread(void *_host)
 
 		/*
 		 * Give other threads a chance to run in the presence of
-		 * errors.  FIXME: determine if due to card removal and
-		 * possibly exit this thread if so.
+		 * errors.
 		 */
-		if (ret < 0)
-			ssleep(1);
+		if (ret < 0) {
+			set_current_state(TASK_INTERRUPTIBLE);
+			if (!kthread_should_stop())
+				schedule_timeout(HZ);
+			set_current_state(TASK_RUNNING);
+		}
 
 		/*
 		 * Adaptive polling frequency based on the assumption
@@ -154,7 +159,8 @@ static int sdio_card_irq_get(struct mmc_card *card)
 	if (!host->sdio_irqs++) {
 		atomic_set(&host->sdio_irq_thread_abort, 0);
 		host->sdio_irq_thread =
-			kthread_run(sdio_irq_thread, host, "ksdiorqd");
+			kthread_run(sdio_irq_thread, host, "ksdioirqd/%s",
+				mmc_hostname(host));
 		if (IS_ERR(host->sdio_irq_thread)) {
 			int err = PTR_ERR(host->sdio_irq_thread);
 			host->sdio_irqs--;

drivers/mmc/host/Kconfig

@@ -2,7 +2,7 @@
 # MMC/SD host controller drivers
 #
 
-comment "MMC/SD Host Controller Drivers"
+comment "MMC/SD/SDIO Host Controller Drivers"
 
 config MMC_ARMMMCI
 	tristate "ARM AMBA Multimedia Card Interface support"
@@ -114,6 +114,17 @@ config MMC_ATMELMCI
 
 	  If unsure, say N.
 
+config MMC_ATMELMCI_DMA
+	bool "Atmel MCI DMA support (EXPERIMENTAL)"
+	depends on MMC_ATMELMCI && DMA_ENGINE && EXPERIMENTAL
+	help
+	  Say Y here to have the Atmel MCI driver use a DMA engine to
+	  do data transfers and thus increase the throughput and
+	  reduce the CPU utilization. Note that this is highly
+	  experimental and may cause the driver to lock up.
+
+	  If unsure, say N.
+
 config MMC_IMX
 	tristate "Motorola i.MX Multimedia Card Interface support"
 	depends on ARCH_IMX
@@ -141,21 +152,22 @@ config MMC_TIFM_SD
 	  module will be called tifm_sd.
 
 config MMC_SPI
-	tristate "MMC/SD over SPI"
-	depends on MMC && SPI_MASTER && !HIGHMEM && HAS_DMA
+	tristate "MMC/SD/SDIO over SPI"
+	depends on SPI_MASTER && !HIGHMEM && HAS_DMA
 	select CRC7
 	select CRC_ITU_T
 	help
-	  Some systems accss MMC/SD cards using a SPI controller instead of
-	  using a "native" MMC/SD controller.  This has a disadvantage of
-	  being relatively high overhead, but a compensating advantage of
-	  working on many systems without dedicated MMC/SD controllers.
+	  Some systems accss MMC/SD/SDIO cards using a SPI controller
+	  instead of using a "native" MMC/SD/SDIO controller.  This has a
+	  disadvantage of being relatively high overhead, but a compensating
+	  advantage of working on many systems without dedicated MMC/SD/SDIO
+	  controllers.
 
 	  If unsure, or if your system has no SPI master driver, say N.
 
 config MMC_S3C
 	tristate "Samsung S3C SD/MMC Card Interface support"
-	depends on ARCH_S3C2410 && MMC
+	depends on ARCH_S3C2410
 	help
 	  This selects a driver for the MCI interface found in
           Samsung's S3C2410, S3C2412, S3C2440, S3C2442 CPUs.
@@ -166,7 +178,7 @@ config MMC_S3C
 
 config MMC_SDRICOH_CS
 	tristate "MMC/SD driver for Ricoh Bay1Controllers (EXPERIMENTAL)"
-	depends on EXPERIMENTAL && MMC && PCI && PCMCIA
+	depends on EXPERIMENTAL && PCI && PCMCIA
 	help
 	  Say Y here if your Notebook reports a Ricoh Bay1Controller PCMCIA
 	  card whenever you insert a MMC or SD card into the card slot.

drivers/mmc/host/atmel-mci-regs.h

@@ -25,8 +25,10 @@
 #define MCI_SDCR		0x000c	/* SD Card / SDIO */
 # define MCI_SDCSEL_SLOT_A	(  0 <<  0)	/* Select SD slot A */
 # define MCI_SDCSEL_SLOT_B	(  1 <<  0)	/* Select SD slot A */
-# define MCI_SDCBUS_1BIT	(  0 <<  7)	/* 1-bit data bus */
-# define MCI_SDCBUS_4BIT	(  1 <<  7)	/* 4-bit data bus */
+# define MCI_SDCSEL_MASK	(  3 <<  0)
+# define MCI_SDCBUS_1BIT	(  0 <<  6)	/* 1-bit data bus */
+# define MCI_SDCBUS_4BIT	(  2 <<  6)	/* 4-bit data bus */
+# define MCI_SDCBUS_MASK	(  3 <<  6)
 #define MCI_ARGR		0x0010	/* Command Argument */
 #define MCI_CMDR		0x0014	/* Command */
 # define MCI_CMDR_CMDNB(x)	((x) <<  0)	/* Command Opcode */

drivers/mmc/host/mmc_spi.c

@@ -95,8 +95,6 @@
  * reads which takes nowhere near that long.  Older cards may be able to use
  * shorter timeouts ... but why bother?
  */
-#define readblock_timeout	ktime_set(0, 100 * 1000 * 1000)
-#define writeblock_timeout	ktime_set(0, 250 * 1000 * 1000)
 #define r1b_timeout		ktime_set(3, 0)
 
 
@@ -220,9 +218,9 @@ mmc_spi_wait_unbusy(struct mmc_spi_host *host, ktime_t timeout)
 	return mmc_spi_skip(host, timeout, sizeof(host->data->status), 0);
 }
 
-static int mmc_spi_readtoken(struct mmc_spi_host *host)
+static int mmc_spi_readtoken(struct mmc_spi_host *host, ktime_t timeout)
 {
-	return mmc_spi_skip(host, readblock_timeout, 1, 0xff);
+	return mmc_spi_skip(host, timeout, 1, 0xff);
 }
 
 
@@ -605,7 +603,8 @@ mmc_spi_setup_data_message(
  * Return negative errno, else success.
  */
 static int
-mmc_spi_writeblock(struct mmc_spi_host *host, struct spi_transfer *t)
+mmc_spi_writeblock(struct mmc_spi_host *host, struct spi_transfer *t,
+	ktime_t timeout)
 {
 	struct spi_device	*spi = host->spi;
 	int			status, i;
@@ -673,7 +672,7 @@ mmc_spi_writeblock(struct mmc_spi_host *host, struct spi_transfer *t)
 		if (scratch->status[i] != 0)
 			return 0;
 	}
-	return mmc_spi_wait_unbusy(host, writeblock_timeout);
+	return mmc_spi_wait_unbusy(host, timeout);
 }
 
 /*
@@ -693,7 +692,8 @@ mmc_spi_writeblock(struct mmc_spi_host *host, struct spi_transfer *t)
  * STOP_TRANSMISSION command.
  */
 static int
-mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t)
+mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t,
+	ktime_t timeout)
 {
 	struct spi_device	*spi = host->spi;
 	int			status;
@@ -707,7 +707,7 @@ mmc_spi_readblock(struct mmc_spi_host *host, struct spi_transfer *t)
 		return status;
 	status = scratch->status[0];
 	if (status == 0xff || status == 0)
-		status = mmc_spi_readtoken(host);
+		status = mmc_spi_readtoken(host, timeout);
 
 	if (status == SPI_TOKEN_SINGLE) {
 		if (host->dma_dev) {
@@ -778,6 +778,8 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd,
 	struct scatterlist	*sg;
 	unsigned		n_sg;
 	int			multiple = (data->blocks > 1);
+	u32			clock_rate;
+	ktime_t			timeout;
 
 	if (data->flags & MMC_DATA_READ)
 		direction = DMA_FROM_DEVICE;
@@ -786,6 +788,14 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd,
 	mmc_spi_setup_data_message(host, multiple, direction);
 	t = &host->t;
 
+	if (t->speed_hz)
+		clock_rate = t->speed_hz;
+	else
+		clock_rate = spi->max_speed_hz;
+
+	timeout = ktime_add_ns(ktime_set(0, 0), data->timeout_ns +
+			data->timeout_clks * 1000000 / clock_rate);
+
 	/* Handle scatterlist segments one at a time, with synch for
 	 * each 512-byte block
 	 */
@@ -832,9 +842,9 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd,
 				t->len);
 
 			if (direction == DMA_TO_DEVICE)
-				status = mmc_spi_writeblock(host, t);
+				status = mmc_spi_writeblock(host, t, timeout);
 			else
-				status = mmc_spi_readblock(host, t);
+				status = mmc_spi_readblock(host, t, timeout);
 			if (status < 0)
 				break;
 
@@ -917,7 +927,7 @@ mmc_spi_data_do(struct mmc_spi_host *host, struct mmc_command *cmd,
 			if (scratch->status[tmp] != 0)
 				return;
 		}
-		tmp = mmc_spi_wait_unbusy(host, writeblock_timeout);
+		tmp = mmc_spi_wait_unbusy(host, timeout);
 		if (tmp < 0 && !data->error)
 			data->error = tmp;
 	}

drivers/mmc/host/sdhci-pci.c

@@ -144,7 +144,8 @@ static int jmicron_probe(struct sdhci_pci_chip *chip)
 			  SDHCI_QUIRK_32BIT_DMA_SIZE |
 			  SDHCI_QUIRK_32BIT_ADMA_SIZE |
 			  SDHCI_QUIRK_RESET_AFTER_REQUEST |
-			  SDHCI_QUIRK_BROKEN_SMALL_PIO;
+			  SDHCI_QUIRK_BROKEN_SMALL_PIO |
+			  SDHCI_QUIRK_FORCE_HIGHSPEED;
 	}
 
 	/*

drivers/mmc/host/sdhci.c

@@ -177,7 +177,7 @@ static void sdhci_read_block_pio(struct sdhci_host *host)
 {
 	unsigned long flags;
 	size_t blksize, len, chunk;
-	u32 scratch;
+	u32 uninitialized_var(scratch);
 	u8 *buf;
 
 	DBG("PIO reading\n");
@@ -1154,7 +1154,7 @@ static void sdhci_tasklet_card(unsigned long param)
 
 	spin_unlock_irqrestore(&host->lock, flags);
 
-	mmc_detect_change(host->mmc, msecs_to_jiffies(500));
+	mmc_detect_change(host->mmc, msecs_to_jiffies(200));
 }
 
 static void sdhci_tasklet_finish(unsigned long param)
@@ -1266,9 +1266,31 @@ static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 			SDHCI_INT_INDEX))
 		host->cmd->error = -EILSEQ;
 
-	if (host->cmd->error)
+	if (host->cmd->error) {
 		tasklet_schedule(&host->finish_tasklet);
-	else if (intmask & SDHCI_INT_RESPONSE)
+		return;
+	}
+
+	/*
+	 * The host can send and interrupt when the busy state has
+	 * ended, allowing us to wait without wasting CPU cycles.
+	 * Unfortunately this is overloaded on the "data complete"
+	 * interrupt, so we need to take some care when handling
+	 * it.
+	 *
+	 * Note: The 1.0 specification is a bit ambiguous about this
+	 *       feature so there might be some problems with older
+	 *       controllers.
+	 */
+	if (host->cmd->flags & MMC_RSP_BUSY) {
+		if (host->cmd->data)
+			DBG("Cannot wait for busy signal when also "
+				"doing a data transfer");
+		else
+			return;
+	}
+
+	if (intmask & SDHCI_INT_RESPONSE)
 		sdhci_finish_command(host);
 }
 
@@ -1278,11 +1300,16 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 
 	if (!host->data) {
 		/*
-		 * A data end interrupt is sent together with the response
-		 * for the stop command.
+		 * The "data complete" interrupt is also used to
+		 * indicate that a busy state has ended. See comment
+		 * above in sdhci_cmd_irq().
 		 */
-		if (intmask & SDHCI_INT_DATA_END)
+		if (host->cmd && (host->cmd->flags & MMC_RSP_BUSY)) {
+			if (intmask & SDHCI_INT_DATA_END) {
+				sdhci_finish_command(host);
 				return;
+			}
+		}
 
 		printk(KERN_ERR "%s: Got data interrupt 0x%08x even "
 			"though no data operation was in progress.\n",
@@ -1604,7 +1631,8 @@ int sdhci_add_host(struct sdhci_host *host)
 	mmc->f_max = host->max_clk;
 	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ;
 
-	if (caps & SDHCI_CAN_DO_HISPD)
+	if ((caps & SDHCI_CAN_DO_HISPD) ||
+		(host->quirks & SDHCI_QUIRK_FORCE_HIGHSPEED))
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED;
 
 	mmc->ocr_avail = 0;

drivers/mmc/host/sdhci.h

@@ -208,6 +208,8 @@ struct sdhci_host {
 #define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL			(1<<12)
 /* Controller has an issue with buffer bits for small transfers */
 #define SDHCI_QUIRK_BROKEN_SMALL_PIO			(1<<13)
+/* Controller supports high speed but doesn't have the caps bit set */
+#define SDHCI_QUIRK_FORCE_HIGHSPEED			(1<<14)
 
 	int			irq;		/* Device IRQ */
 	void __iomem *		ioaddr;		/* Mapped address */

include/linux/mmc/host.h

@@ -65,7 +65,7 @@ struct mmc_host_ops {
 	 *   -ENOSYS when not supported (equal to NULL callback)
 	 *   or a negative errno value when something bad happened
 	 *
-	 * Return values for the get_ro callback should be:
+	 * Return values for the get_cd callback should be:
 	 *   0 for a absent card
 	 *   1 for a present card
 	 *   -ENOSYS when not supported (equal to NULL callback)