diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/sdhci.c | 92 |
1 files changed, 50 insertions, 42 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index cdeba914f9..c82af1e16e 100644 --- a/drivers/mmc/sdhci.c +++ b/drivers/mmc/sdhci.c @@ -66,18 +66,52 @@ 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; @@ -104,14 +138,13 @@ 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 { @@ -149,10 +182,11 @@ 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; @@ -218,33 +252,11 @@ 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); @@ -255,12 +267,6 @@ 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 { @@ -286,7 +292,7 @@ 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); @@ -570,6 +576,8 @@ 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 = |