@@ -67,18 +67,52 @@ static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
sdhci_writel(host, *(u32 *)offs, SDHCI_BUFFER);
}
}
-
-static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
- unsigned int start_addr)
-{
- unsigned int stat, rdy, mask, timeout, block = 0;
- bool transfer_done = false;
#ifdef CONFIG_MMC_SDHCI_SDMA
+static void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data,
+ int *is_aligned, int trans_bytes)
+{
unsigned char ctrl;
+
+ if (data->flags == MMC_DATA_READ)
+ host->start_addr = (dma_addr_t)data->dest;
+ else
+ host->start_addr = (dma_addr_t)data->src;
+
+ if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
+ (host->start_addr & 0x7) != 0x0) {
+ *is_aligned = 0;
+ host->start_addr = (unsigned long)aligned_buffer;
+ if (data->flags != MMC_DATA_READ)
+ memcpy(aligned_buffer, data->src, trans_bytes);
+ }
+
ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
ctrl &= ~SDHCI_CTRL_DMA_MASK;
sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+
+#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
+ /*
+ * Always use this bounce-buffer when
+ * CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
+ */
+ *is_aligned = 0;
+ host->start_addr = (unsigned long)aligned_buffer;
+ if (data->flags != MMC_DATA_READ)
+ memcpy(aligned_buffer, data->src, trans_bytes);
+#endif
+ sdhci_writel(host, host->start_addr, SDHCI_DMA_ADDRESS);
+ flush_cache(host->start_addr, ROUND(trans_bytes, ARCH_DMA_MINALIGN));
+}
+#else
+static void sdhci_prepare_dma(struct sdhci_host *host, struct mmc_data *data,
+ int *is_aligned, int trans_bytes)
+{}
#endif
+static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data)
+{
+ dma_addr_t start_addr = host->start_addr;
+ unsigned int stat, rdy, mask, timeout, block = 0;
+ bool transfer_done = false;
timeout = 1000000;
rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL;
@@ -105,14 +139,13 @@ static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
continue;
}
}
-#ifdef CONFIG_MMC_SDHCI_SDMA
- if (!transfer_done && (stat & SDHCI_INT_DMA_END)) {
+ if ((host->flags & USE_SDMA) && !transfer_done &&
+ (stat & SDHCI_INT_DMA_END)) {
sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1);
start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
}
-#endif
if (timeout-- > 0)
udelay(10);
else {
@@ -150,10 +183,11 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
int ret = 0;
int trans_bytes = 0, is_aligned = 1;
u32 mask, flags, mode;
- unsigned int time = 0, start_addr = 0;
+ unsigned int time = 0;
int mmc_dev = mmc_get_blk_desc(mmc)->devnum;
ulong start = get_timer(0);
+ host->start_addr = 0;
/* Timeout unit - ms */
static unsigned int cmd_timeout = SDHCI_CMD_DEFAULT_TIMEOUT;
@@ -219,33 +253,11 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
if (data->flags == MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
-#ifdef CONFIG_MMC_SDHCI_SDMA
- if (data->flags == MMC_DATA_READ)
- start_addr = (unsigned long)data->dest;
- else
- start_addr = (unsigned long)data->src;
- if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
- (start_addr & 0x7) != 0x0) {
- is_aligned = 0;
- start_addr = (unsigned long)aligned_buffer;
- if (data->flags != MMC_DATA_READ)
- memcpy(aligned_buffer, data->src, trans_bytes);
+ if (host->flags & USE_SDMA) {
+ mode |= SDHCI_TRNS_DMA;
+ sdhci_prepare_dma(host, data, &is_aligned, trans_bytes);
}
-#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
- /*
- * Always use this bounce-buffer when
- * CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
- */
- is_aligned = 0;
- start_addr = (unsigned long)aligned_buffer;
- if (data->flags != MMC_DATA_READ)
- memcpy(aligned_buffer, data->src, trans_bytes);
-#endif
-
- sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
- mode |= SDHCI_TRNS_DMA;
-#endif
sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
data->blocksize),
SDHCI_BLOCK_SIZE);
@@ -256,12 +268,6 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
}
sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT);
-#ifdef CONFIG_MMC_SDHCI_SDMA
- if (data) {
- trans_bytes = ALIGN(trans_bytes, CONFIG_SYS_CACHELINE_SIZE);
- flush_cache(start_addr, trans_bytes);
- }
-#endif
sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND);
start = get_timer(0);
do {
@@ -287,7 +293,7 @@ static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
ret = -1;
if (!ret && data)
- ret = sdhci_transfer_data(host, data, start_addr);
+ ret = sdhci_transfer_data(host, data);
if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD)
udelay(1000);
@@ -578,6 +584,8 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
__func__);
return -EINVAL;
}
+
+ host->flags |= USE_SDMA;
#endif
if (host->quirks & SDHCI_QUIRK_REG32_RW)
host->version =
@@ -272,6 +272,9 @@ struct sdhci_host {
uint voltages;
struct mmc_config cfg;
+ dma_addr_t start_addr;
+ int flags;
+#define USE_SDMA (0x1 << 0)
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
In preparation for addition of ADMA2 support, cleanup SDMA handling by moving it to a new sdhci_prepare_dma() function. Also add a flags field in sdhci_host to indicate if DMA is enabled. Signed-off-by: Faiz Abbas <faiz_abbas@ti.com> --- drivers/mmc/sdhci.c | 92 ++++++++++++++++++++++++--------------------- include/sdhci.h | 3 ++ 2 files changed, 53 insertions(+), 42 deletions(-)