SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
- SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
+ SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE |
+ SDHCI_INT_ADMA_ERROR;
writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
DBG("PIO transfer complete.\n");
}
+static char *sdhci_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 sdhci_kunmap_atomic(void *buffer, unsigned long *flags)
+{
+ kunmap_atomic(buffer, KM_BIO_SRC_IRQ);
+ local_irq_restore(*flags);
+}
+
+static void sdhci_adma_table_pre(struct sdhci_host *host,
+ struct mmc_data *data)
+{
+ int direction;
+
+ u8 *desc;
+ u8 *align;
+ dma_addr_t addr;
+ dma_addr_t align_addr;
+ int len, offset;
+
+ struct scatterlist *sg;
+ int i;
+ char *buffer;
+ unsigned long flags;
+
+ /*
+ * The spec does not specify endianness of descriptor table.
+ * We currently guess that it is LE.
+ */
+
+ if (data->flags & MMC_DATA_READ)
+ direction = DMA_FROM_DEVICE;
+ else
+ direction = DMA_TO_DEVICE;
+
+ /*
+ * The ADMA descriptor table is mapped further down as we
+ * need to fill it with data first.
+ */
+
+ host->align_addr = dma_map_single(mmc_dev(host->mmc),
+ host->align_buffer, 128 * 4, direction);
+ BUG_ON(host->align_addr & 0x3);
+
+ host->sg_count = dma_map_sg(mmc_dev(host->mmc),
+ data->sg, data->sg_len, direction);
+
+ desc = host->adma_desc;
+ align = host->align_buffer;
+
+ align_addr = host->align_addr;
+
+ for_each_sg(data->sg, sg, host->sg_count, i) {
+ addr = sg_dma_address(sg);
+ len = sg_dma_len(sg);
+
+ /*
+ * The SDHCI specification states that ADMA
+ * addresses must be 32-bit aligned. If they
+ * aren't, then we use a bounce buffer for
+ * the (up to three) bytes that screw up the
+ * alignment.
+ */
+ offset = (4 - (addr & 0x3)) & 0x3;
+ if (offset) {
+ if (data->flags & MMC_DATA_WRITE) {
+ buffer = sdhci_kmap_atomic(sg, &flags);
+ memcpy(align, buffer, offset);
+ sdhci_kunmap_atomic(buffer, &flags);
+ }
+
+ desc[7] = (align_addr >> 24) & 0xff;
+ desc[6] = (align_addr >> 16) & 0xff;
+ desc[5] = (align_addr >> 8) & 0xff;
+ desc[4] = (align_addr >> 0) & 0xff;
+
+ BUG_ON(offset > 65536);
+
+ desc[3] = (offset >> 8) & 0xff;
+ desc[2] = (offset >> 0) & 0xff;
+
+ desc[1] = 0x00;
+ desc[0] = 0x21; /* tran, valid */
+
+ align += 4;
+ align_addr += 4;
+
+ desc += 8;
+
+ addr += offset;
+ len -= offset;
+ }
+
+ desc[7] = (addr >> 24) & 0xff;
+ desc[6] = (addr >> 16) & 0xff;
+ desc[5] = (addr >> 8) & 0xff;
+ desc[4] = (addr >> 0) & 0xff;
+
+ BUG_ON(len > 65536);
+
+ desc[3] = (len >> 8) & 0xff;
+ desc[2] = (len >> 0) & 0xff;
+
+ desc[1] = 0x00;
+ desc[0] = 0x21; /* tran, valid */
+
+ desc += 8;
+
+ /*
+ * If this triggers then we have a calculation bug
+ * somewhere. :/
+ */
+ WARN_ON((desc - host->adma_desc) > (128 * 2 + 1) * 4);
+ }
+
+ /*
+ * Add a terminating entry.
+ */
+ desc[7] = 0;
+ desc[6] = 0;
+ desc[5] = 0;
+ desc[4] = 0;
+
+ desc[3] = 0;
+ desc[2] = 0;
+
+ desc[1] = 0x00;
+ desc[0] = 0x03; /* nop, end, valid */
+
+ /*
+ * Resync align buffer as we might have changed it.
+ */
+ if (data->flags & MMC_DATA_WRITE) {
+ dma_sync_single_for_device(mmc_dev(host->mmc),
+ host->align_addr, 128 * 4, direction);
+ }
+
+ host->adma_addr = dma_map_single(mmc_dev(host->mmc),
+ host->adma_desc, (128 * 2 + 1) * 4, DMA_TO_DEVICE);
+ BUG_ON(host->adma_addr & 0x3);
+}
+
+static void sdhci_adma_table_post(struct sdhci_host *host,
+ struct mmc_data *data)
+{
+ int direction;
+
+ struct scatterlist *sg;
+ int i, size;
+ u8 *align;
+ char *buffer;
+ unsigned long flags;
+
+ if (data->flags & MMC_DATA_READ)
+ direction = DMA_FROM_DEVICE;
+ else
+ direction = DMA_TO_DEVICE;
+
+ dma_unmap_single(mmc_dev(host->mmc), host->adma_addr,
+ (128 * 2 + 1) * 4, DMA_TO_DEVICE);
+
+ dma_unmap_single(mmc_dev(host->mmc), host->align_addr,
+ 128 * 4, direction);
+
+ if (data->flags & MMC_DATA_READ) {
+ dma_sync_sg_for_cpu(mmc_dev(host->mmc), data->sg,
+ data->sg_len, direction);
+
+ align = host->align_buffer;
+
+ for_each_sg(data->sg, sg, host->sg_count, i) {
+ if (sg_dma_address(sg) & 0x3) {
+ size = 4 - (sg_dma_address(sg) & 0x3);
+
+ buffer = sdhci_kmap_atomic(sg, &flags);
+ memcpy(buffer, align, size);
+ sdhci_kunmap_atomic(buffer, &flags);
+
+ align += 4;
+ }
+ }
+ }
+
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg,
+ data->sg_len, direction);
+}
+
static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
{
u8 count;
static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
{
u8 count;
+ u8 ctrl;
WARN_ON(host->data);
if (host->flags & SDHCI_USE_DMA)
host->flags |= SDHCI_REQ_USE_DMA;
- if (unlikely((host->flags & SDHCI_REQ_USE_DMA) &&
- (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE) &&
- ((data->blksz * data->blocks) & 0x3))) {
- DBG("Reverting to PIO because of transfer size (%d)\n",
- data->blksz * data->blocks);
- host->flags &= ~SDHCI_REQ_USE_DMA;
+ /*
+ * FIXME: This doesn't account for merging when mapping the
+ * scatterlist.
+ */
+ if (host->flags & SDHCI_REQ_USE_DMA) {
+ int broken, i;
+ struct scatterlist *sg;
+
+ broken = 0;
+ if (host->flags & SDHCI_USE_ADMA) {
+ if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
+ broken = 1;
+ } else {
+ if (host->quirks & SDHCI_QUIRK_32BIT_DMA_SIZE)
+ broken = 1;
+ }
+
+ if (unlikely(broken)) {
+ for_each_sg(data->sg, sg, data->sg_len, i) {
+ if (sg->length & 0x3) {
+ DBG("Reverting to PIO because of "
+ "transfer size (%d)\n",
+ sg->length);
+ host->flags &= ~SDHCI_REQ_USE_DMA;
+ break;
+ }
+ }
+ }
}
/*
* The assumption here being that alignment is the same after
* translation to device address space.
*/
- if (unlikely((host->flags & SDHCI_REQ_USE_DMA) &&
- (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
- (data->sg->offset & 0x3))) {
- DBG("Reverting to PIO because of bad alignment\n");
- host->flags &= ~SDHCI_REQ_USE_DMA;
+ if (host->flags & SDHCI_REQ_USE_DMA) {
+ int broken, i;
+ struct scatterlist *sg;
+
+ broken = 0;
+ if (host->flags & SDHCI_USE_ADMA) {
+ /*
+ * As we use 3 byte chunks to work around
+ * alignment problems, we need to check this
+ * quirk.
+ */
+ if (host->quirks & SDHCI_QUIRK_32BIT_ADMA_SIZE)
+ broken = 1;
+ } else {
+ if (host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR)
+ broken = 1;
+ }
+
+ if (unlikely(broken)) {
+ for_each_sg(data->sg, sg, data->sg_len, i) {
+ if (sg->offset & 0x3) {
+ DBG("Reverting to PIO because of "
+ "bad alignment\n");
+ host->flags &= ~SDHCI_REQ_USE_DMA;
+ break;
+ }
+ }
+ }
+ }
+
+ /*
+ * Always adjust the DMA selection as some controllers
+ * (e.g. JMicron) can't do PIO properly when the selection
+ * is ADMA.
+ */
+ if (host->version >= SDHCI_SPEC_200) {
+ ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
+ ctrl &= ~SDHCI_CTRL_DMA_MASK;
+ if ((host->flags & SDHCI_REQ_USE_DMA) &&
+ (host->flags & SDHCI_USE_ADMA))
+ ctrl |= SDHCI_CTRL_ADMA32;
+ else
+ ctrl |= SDHCI_CTRL_SDMA;
+ writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
}
if (host->flags & SDHCI_REQ_USE_DMA) {
- int count;
+ if (host->flags & SDHCI_USE_ADMA) {
+ sdhci_adma_table_pre(host, data);
+ writel(host->adma_addr,
+ host->ioaddr + SDHCI_ADMA_ADDRESS);
+ } else {
+ int count;
- count = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
- (data->flags & MMC_DATA_READ) ?
- DMA_FROM_DEVICE : DMA_TO_DEVICE);
- WARN_ON(count != 1);
+ count = dma_map_sg(mmc_dev(host->mmc),
+ data->sg, data->sg_len,
+ (data->flags & MMC_DATA_READ) ?
+ DMA_FROM_DEVICE :
+ DMA_TO_DEVICE);
+ WARN_ON(count != 1);
- writel(sg_dma_address(data->sg),
- host->ioaddr + SDHCI_DMA_ADDRESS);
+ writel(sg_dma_address(data->sg),
+ host->ioaddr + SDHCI_DMA_ADDRESS);
+ }
} else {
host->cur_sg = data->sg;
host->num_sg = data->sg_len;
host->data = NULL;
if (host->flags & SDHCI_REQ_USE_DMA) {
- dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
- (data->flags & MMC_DATA_READ) ?
- DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ if (host->flags & SDHCI_USE_ADMA)
+ sdhci_adma_table_post(host, data);
+ else {
+ dma_unmap_sg(mmc_dev(host->mmc), data->sg,
+ data->sg_len, (data->flags & MMC_DATA_READ) ?
+ DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ }
}
/*
host->data->error = -ETIMEDOUT;
else if (intmask & (SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_END_BIT))
host->data->error = -EILSEQ;
+ else if (intmask & SDHCI_INT_ADMA_ERROR)
+ host->data->error = -EIO;
if (host->data->error)
sdhci_finish_data(host);
{
struct mmc_host *mmc;
unsigned int caps;
- unsigned int version;
int ret;
WARN_ON(host == NULL);
sdhci_reset(host, SDHCI_RESET_ALL);
- version = readw(host->ioaddr + SDHCI_HOST_VERSION);
- version = (version & SDHCI_SPEC_VER_MASK) >> SDHCI_SPEC_VER_SHIFT;
- if (version > 1) {
+ host->version = readw(host->ioaddr + SDHCI_HOST_VERSION);
+ host->version = (host->version & SDHCI_SPEC_VER_MASK)
+ >> SDHCI_SPEC_VER_SHIFT;
+ if (host->version > SDHCI_SPEC_200) {
printk(KERN_ERR "%s: Unknown controller version (%d). "
"You may experience problems.\n", mmc_hostname(mmc),
- version);
+ host->version);
}
caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
host->flags &= ~SDHCI_USE_DMA;
}
+ if (host->flags & SDHCI_USE_DMA) {
+ if ((host->version >= SDHCI_SPEC_200) &&
+ (caps & SDHCI_CAN_DO_ADMA2))
+ host->flags |= SDHCI_USE_ADMA;
+ }
+
+ if ((host->quirks & SDHCI_QUIRK_BROKEN_ADMA) &&
+ (host->flags & SDHCI_USE_ADMA)) {
+ DBG("Disabling ADMA as it is marked broken\n");
+ host->flags &= ~SDHCI_USE_ADMA;
+ }
+
if (host->flags & SDHCI_USE_DMA) {
if (host->ops->enable_dma) {
if (host->ops->enable_dma(host)) {
printk(KERN_WARNING "%s: No suitable DMA "
"available. Falling back to PIO.\n",
mmc_hostname(mmc));
- host->flags &= ~SDHCI_USE_DMA;
+ host->flags &= ~(SDHCI_USE_DMA | SDHCI_USE_ADMA);
}
}
}
+ if (host->flags & SDHCI_USE_ADMA) {
+ /*
+ * We need to allocate descriptors for all sg entries
+ * (128) and potentially one alignment transfer for
+ * each of those entries.
+ */
+ host->adma_desc = kmalloc((128 * 2 + 1) * 4, GFP_KERNEL);
+ host->align_buffer = kmalloc(128 * 4, GFP_KERNEL);
+ if (!host->adma_desc || !host->align_buffer) {
+ kfree(host->adma_desc);
+ kfree(host->align_buffer);
+ printk(KERN_WARNING "%s: Unable to allocate ADMA "
+ "buffers. Falling back to standard DMA.\n",
+ mmc_hostname(mmc));
+ host->flags &= ~SDHCI_USE_ADMA;
+ }
+ }
+
/* XXX: Hack to get MMC layer to avoid highmem */
if (!(host->flags & SDHCI_USE_DMA))
mmc_dev(host->mmc)->dma_mask = 0;
spin_lock_init(&host->lock);
/*
- * Maximum number of segments. Hardware cannot do scatter lists.
+ * Maximum number of segments. Depends on if the hardware
+ * can do scatter/gather or not.
*/
- if (host->flags & SDHCI_USE_DMA)
+ if (host->flags & SDHCI_USE_ADMA)
+ mmc->max_hw_segs = 128;
+ else if (host->flags & SDHCI_USE_DMA)
mmc->max_hw_segs = 1;
- else
- mmc->max_hw_segs = 16;
- mmc->max_phys_segs = 16;
+ else /* PIO */
+ mmc->max_hw_segs = 128;
+ mmc->max_phys_segs = 128;
/*
* Maximum number of sectors in one transfer. Limited by DMA boundary
/*
* Maximum segment size. Could be one segment with the maximum number
- * of bytes.
+ * of bytes. When doing hardware scatter/gather, each entry cannot
+ * be larger than 64 KiB though.
*/
- mmc->max_seg_size = mmc->max_req_size;
+ if (host->flags & SDHCI_USE_ADMA)
+ mmc->max_seg_size = 65536;
+ else
+ mmc->max_seg_size = mmc->max_req_size;
/*
* Maximum block size. This varies from controller to controller and
mmc_add_host(mmc);
- printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s\n",
+ printk(KERN_INFO "%s: SDHCI controller on %s [%s] using %s%s\n",
mmc_hostname(mmc), host->hw_name, mmc_dev(mmc)->bus_id,
+ (host->flags & SDHCI_USE_ADMA)?"A":"",
(host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
return 0;
tasklet_kill(&host->card_tasklet);
tasklet_kill(&host->finish_tasklet);
+
+ kfree(host->adma_desc);
+ kfree(host->align_buffer);
+
+ host->adma_desc = NULL;
+ host->align_buffer = NULL;
}
EXPORT_SYMBOL_GPL(sdhci_remove_host);
#define SDHCI_CTRL_LED 0x01
#define SDHCI_CTRL_4BITBUS 0x02
#define SDHCI_CTRL_HISPD 0x04
+#define SDHCI_CTRL_DMA_MASK 0x18
+#define SDHCI_CTRL_SDMA 0x00
+#define SDHCI_CTRL_ADMA1 0x08
+#define SDHCI_CTRL_ADMA32 0x10
+#define SDHCI_CTRL_ADMA64 0x18
#define SDHCI_POWER_CONTROL 0x29
#define SDHCI_POWER_ON 0x01
#define SDHCI_INT_DATA_END_BIT 0x00400000
#define SDHCI_INT_BUS_POWER 0x00800000
#define SDHCI_INT_ACMD12ERR 0x01000000
+#define SDHCI_INT_ADMA_ERROR 0x02000000
#define SDHCI_INT_NORMAL_MASK 0x00007FFF
#define SDHCI_INT_ERROR_MASK 0xFFFF8000
#define SDHCI_CLOCK_BASE_SHIFT 8
#define SDHCI_MAX_BLOCK_MASK 0x00030000
#define SDHCI_MAX_BLOCK_SHIFT 16
+#define SDHCI_CAN_DO_ADMA2 0x00080000
+#define SDHCI_CAN_DO_ADMA1 0x00100000
#define SDHCI_CAN_DO_HISPD 0x00200000
#define SDHCI_CAN_DO_DMA 0x00400000
#define SDHCI_CAN_VDD_330 0x01000000
#define SDHCI_CAN_VDD_300 0x02000000
#define SDHCI_CAN_VDD_180 0x04000000
+#define SDHCI_CAN_64BIT 0x10000000
/* 44-47 reserved for more caps */
/* 4C-4F reserved for more max current */
-/* 50-FB reserved */
+#define SDHCI_SET_ACMD12_ERROR 0x50
+#define SDHCI_SET_INT_ERROR 0x52
+
+#define SDHCI_ADMA_ERROR 0x54
+
+/* 55-57 reserved */
+
+#define SDHCI_ADMA_ADDRESS 0x58
+
+/* 60-FB reserved */
#define SDHCI_SLOT_INT_STATUS 0xFC
#define SDHCI_VENDOR_VER_SHIFT 8
#define SDHCI_SPEC_VER_MASK 0x00FF
#define SDHCI_SPEC_VER_SHIFT 0
+#define SDHCI_SPEC_100 0
+#define SDHCI_SPEC_200 1
struct sdhci_ops;
#define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
/* Controller has an unusable DMA engine */
#define SDHCI_QUIRK_BROKEN_DMA (1<<5)
+/* Controller has an unusable ADMA engine */
+#define SDHCI_QUIRK_BROKEN_ADMA (1<<6)
/* Controller can only DMA from 32-bit aligned addresses */
-#define SDHCI_QUIRK_32BIT_DMA_ADDR (1<<6)
+#define SDHCI_QUIRK_32BIT_DMA_ADDR (1<<7)
/* Controller can only DMA chunk sizes that are a multiple of 32 bits */
-#define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<7)
+#define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<8)
+/* Controller can only ADMA chunks that are a multiple of 32 bits */
+#define SDHCI_QUIRK_32BIT_ADMA_SIZE (1<<9)
/* Controller needs to be reset after each request to stay stable */
-#define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<8)
+#define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<10)
/* Controller needs voltage and power writes to happen separately */
-#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1<<9)
+#define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1<<11)
/* Controller provides an incorrect timeout value for transfers */
-#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<10)
+#define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<12)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */
int flags; /* Host attributes */
#define SDHCI_USE_DMA (1<<0) /* Host is DMA capable */
-#define SDHCI_REQ_USE_DMA (1<<1) /* Use DMA for this req. */
-#define SDHCI_DEVICE_DEAD (1<<2) /* Device unresponsive */
+#define SDHCI_USE_ADMA (1<<1) /* Host is ADMA capable */
+#define SDHCI_REQ_USE_DMA (1<<2) /* Use DMA for this req. */
+#define SDHCI_DEVICE_DEAD (1<<3) /* Device unresponsive */
+
+ unsigned int version; /* SDHCI spec. version */
unsigned int max_clk; /* Max possible freq (MHz) */
unsigned int timeout_clk; /* Timeout freq (KHz) */
int offset; /* Offset into current sg */
int remain; /* Bytes left in current */
+ int sg_count; /* Mapped sg entries */
+
+ u8 *adma_desc; /* ADMA descriptor table */
+ u8 *align_buffer; /* Bounce buffer */
+
+ dma_addr_t adma_addr; /* Mapped ADMA descr. table */
+ dma_addr_t align_addr; /* Mapped bounce buffer */
+
struct tasklet_struct card_tasklet; /* Tasklet structures */
struct tasklet_struct finish_tasklet;
projects / linux-2.6 / commitdiff