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-rw-r--r--arch/avr32/boards/atngw100/setup.c7
-rw-r--r--arch/avr32/boards/atstk1000/atstk1002.c18
-rw-r--r--arch/avr32/boards/atstk1000/atstk1003.c12
-rw-r--r--arch/avr32/boards/atstk1000/atstk1004.c12
-rw-r--r--arch/avr32/include/asm/atmel-mci.h32
-rw-r--r--arch/avr32/mach-at32ap/at32ap700x.c88
-rw-r--r--drivers/mmc/Kconfig9
-rw-r--r--drivers/mmc/card/Kconfig3
-rw-r--r--drivers/mmc/card/block.c46
-rw-r--r--drivers/mmc/card/queue.c23
-rw-r--r--drivers/mmc/core/mmc_ops.c8
-rw-r--r--drivers/mmc/core/sdio.c52
-rw-r--r--drivers/mmc/core/sdio_irq.c16
-rw-r--r--drivers/mmc/host/Kconfig30
-rw-r--r--drivers/mmc/host/atmel-mci-regs.h6
-rw-r--r--drivers/mmc/host/atmel-mci.c1352
-rw-r--r--drivers/mmc/host/mmc_spi.c32
-rw-r--r--drivers/mmc/host/sdhci-pci.c3
-rw-r--r--drivers/mmc/host/sdhci.c46
-rw-r--r--drivers/mmc/host/sdhci.h2
-rw-r--r--include/linux/mmc/host.h2
21 files changed, 1293 insertions, 506 deletions
diff --git a/arch/avr32/boards/atngw100/setup.c b/arch/avr32/boards/atngw100/setup.c
index b8286f1ce85..f3085208959 100644
--- a/arch/avr32/boards/atngw100/setup.c
+++ b/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 = {
- .detect_pin = GPIO_PIN_PC(25),
- .wp_pin = GPIO_PIN_PE(0),
+ .slot[0] = {
+ .bus_width = 4,
+ .detect_pin = GPIO_PIN_PC(25),
+ .wp_pin = GPIO_PIN_PE(0),
+ },
};
/*
diff --git a/arch/avr32/boards/atstk1000/atstk1002.c b/arch/avr32/boards/atstk1000/atstk1002.c
index dfc3443e23a..4fedbc4488d 100644
--- a/arch/avr32/boards/atstk1000/atstk1002.c
+++ b/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
+ .detect_pin = GPIO_PIN_PC(14), /* gpio30/sdcd */
+ .wp_pin = GPIO_PIN_PC(15), /* gpio31/sdwp */
#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]));
diff --git a/arch/avr32/boards/atstk1000/atstk1003.c b/arch/avr32/boards/atstk1000/atstk1003.c
index 0cf664174c1..acc61235b89 100644
--- a/arch/avr32/boards/atstk1000/atstk1003.c
+++ b/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
diff --git a/arch/avr32/boards/atstk1000/atstk1004.c b/arch/avr32/boards/atstk1000/atstk1004.c
index 50a5273e591..d6a2d02f032 100644
--- a/arch/avr32/boards/atstk1000/atstk1004.c
+++ b/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);
diff --git a/arch/avr32/include/asm/atmel-mci.h b/arch/avr32/include/asm/atmel-mci.h
index c2ea6e1c9aa..59f3fadd0b6 100644
--- a/arch/avr32/include/asm/atmel-mci.h
+++ b/arch/avr32/include/asm/atmel-mci.h
@@ -1,9 +1,39 @@
#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 */
diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
index e01dbe4ebb4..f1b9a3ac273 100644
--- a/arch/avr32/mach-at32ap/at32ap700x.c
+++ b/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 */
- select_peripheral(PA(13), PERIPH_A, 0); /* DATA1 */
- select_peripheral(PA(14), PERIPH_A, 0); /* DATA2 */
- select_peripheral(PA(15), PERIPH_A, 0); /* DATA3 */
+ /* CLK line is common to both slots */
+ select_peripheral(PA(10), PERIPH_A, 0);
- 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);
+ 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->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;
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index c0b41e8bcd9..f2eeb38efa6 100644
--- a/drivers/mmc/Kconfig
+++ b/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"
diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig
index dd0f398ee2f..3f2a912659a 100644
--- a/drivers/mmc/card/Kconfig
+++ b/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.
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index efacee0404a..24c97d3d16b 100644
--- a/drivers/mmc/card/block.c
+++ b/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);
diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c
index 3dee97e7d16..406989e992b 100644
--- a/drivers/mmc/card/queue.c
+++ b/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));
+ }
+ }
- 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 {
+ 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);
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 64b05c6270f..9c50e6f1c23 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/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);
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 4eab79e09cc..fb99ccff908 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -165,6 +165,36 @@ static int sdio_enable_wide(struct mmc_card *card)
}
/*
+ * 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.
*/
static void mmc_sdio_remove(struct mmc_host *host)
@@ -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).
*/
- mmc_set_clock(host, card->cis.max_dtr);
+ 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).
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index c292e124107..bb192f90e8e 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/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--;
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index ea8d7a3490d..dfa585f7fea 100644
--- a/drivers/mmc/host/Kconfig
+++ b/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.
diff --git a/drivers/mmc/host/atmel-mci-regs.h b/drivers/mmc/host/atmel-mci-regs.h
index 26bd80e6503..b58364ed6bb 100644
--- a/drivers/mmc/host/atmel-mci-regs.h
+++ b/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 */
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 00008967ef7..7a3f2436b01 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -11,6 +11,8 @@
#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/device.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/init.h>
@@ -33,64 +35,178 @@
#include "atmel-mci-regs.h"
#define ATMCI_DATA_ERROR_FLAGS (MCI_DCRCE | MCI_DTOE | MCI_OVRE | MCI_UNRE)
+#define ATMCI_DMA_THRESHOLD 16
enum {
EVENT_CMD_COMPLETE = 0,
- EVENT_DATA_ERROR,
- EVENT_DATA_COMPLETE,
- EVENT_STOP_SENT,
- EVENT_STOP_COMPLETE,
EVENT_XFER_COMPLETE,
+ EVENT_DATA_COMPLETE,
+ EVENT_DATA_ERROR,
+};
+
+enum atmel_mci_state {
+ STATE_IDLE = 0,
+ STATE_SENDING_CMD,
+ STATE_SENDING_DATA,
+ STATE_DATA_BUSY,
+ STATE_SENDING_STOP,
+ STATE_DATA_ERROR,
+};
+
+struct atmel_mci_dma {
+#ifdef CONFIG_MMC_ATMELMCI_DMA
+ struct dma_client client;
+ struct dma_chan *chan;
+ struct dma_async_tx_descriptor *data_desc;
+#endif
};
+/**
+ * struct atmel_mci - MMC controller state shared between all slots
+ * @lock: Spinlock protecting the queue and associated data.
+ * @regs: Pointer to MMIO registers.
+ * @sg: Scatterlist entry currently being processed by PIO code, if any.
+ * @pio_offset: Offset into the current scatterlist entry.
+ * @cur_slot: The slot which is currently using the controller.
+ * @mrq: The request currently being processed on @cur_slot,
+ * or NULL if the controller is idle.
+ * @cmd: The command currently being sent to the card, or NULL.
+ * @data: The data currently being transferred, or NULL if no data
+ * transfer is in progress.
+ * @dma: DMA client state.
+ * @data_chan: DMA channel being used for the current data transfer.
+ * @cmd_status: Snapshot of SR taken upon completion of the current
+ * command. Only valid when EVENT_CMD_COMPLETE is pending.
+ * @data_status: Snapshot of SR taken upon completion of the current
+ * data transfer. Only valid when EVENT_DATA_COMPLETE or
+ * EVENT_DATA_ERROR is pending.
+ * @stop_cmdr: Value to be loaded into CMDR when the stop command is
+ * to be sent.
+ * @tasklet: Tasklet running the request state machine.
+ * @pending_events: Bitmask of events flagged by the interrupt handler
+ * to be processed by the tasklet.
+ * @completed_events: Bitmask of events which the state machine has
+ * processed.
+ * @state: Tasklet state.
+ * @queue: List of slots waiting for access to the controller.
+ * @need_clock_update: Update the clock rate before the next request.
+ * @need_reset: Reset controller before next request.
+ * @mode_reg: Value of the MR register.
+ * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus
+ * rate and timeout calculations.
+ * @mapbase: Physical address of the MMIO registers.
+ * @mck: The peripheral bus clock hooked up to the MMC controller.
+ * @pdev: Platform device associated with the MMC controller.
+ * @slot: Slots sharing this MMC controller.
+ *
+ * Locking
+ * =======
+ *
+ * @lock is a softirq-safe spinlock protecting @queue as well as
+ * @cur_slot, @mrq and @state. These must always be updated
+ * at the same time while holding @lock.
+ *
+ * @lock also protects mode_reg and need_clock_update since these are
+ * used to synchronize mode register updates with the queue
+ * processing.
+ *
+ * The @mrq field of struct atmel_mci_slot is also protected by @lock,
+ * and must always be written at the same time as the slot is added to
+ * @queue.
+ *
+ * @pending_events and @completed_events are accessed using atomic bit
+ * operations, so they don't need any locking.
+ *
+ * None of the fields touched by the interrupt handler need any
+ * locking. However, ordering is important: Before EVENT_DATA_ERROR or
+ * EVENT_DATA_COMPLETE is set in @pending_events, all data-related
+ * interrupts must be disabled and @data_status updated with a
+ * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the
+ * CMDRDY interupt must be disabled and @cmd_status updated with a
+ * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the
+ * bytes_xfered field of @data must be written. This is ensured by
+ * using barriers.
+ */
struct atmel_mci {
- struct mmc_host *mmc;
+ spinlock_t lock;
void __iomem *regs;
struct scatterlist *sg;
unsigned int pio_offset;
+ struct atmel_mci_slot *cur_slot;
struct mmc_request *mrq;
struct mmc_command *cmd;
struct mmc_data *data;
+ struct atmel_mci_dma dma;
+ struct dma_chan *data_chan;
+
u32 cmd_status;
u32 data_status;
- u32 stop_status;
u32 stop_cmdr;
- u32 mode_reg;
- u32 sdc_reg;
-
struct tasklet_struct tasklet;
unsigned long pending_events;
unsigned long completed_events;
+ enum atmel_mci_state state;
+ struct list_head queue;
- int present;
- int detect_pin;
- int wp_pin;
-
- /* For detect pin debouncing */
- struct timer_list detect_timer;
-
+ bool need_clock_update;
+ bool need_reset;
+ u32 mode_reg;
unsigned long bus_hz;
unsigned long mapbase;
struct clk *mck;
struct platform_device *pdev;
+
+ struct atmel_mci_slot *slot[ATMEL_MCI_MAX_NR_SLOTS];
+};
+
+/**
+ * struct atmel_mci_slot - MMC slot state
+ * @mmc: The mmc_host representing this slot.
+ *