Commit a02f8f48 authored by Zhou Yanjie's avatar Zhou Yanjie Committed by Ulf Hansson

mmc: jz4740: Add 8bit mode support

Add support for 8bit mode, now supports 1bit/4bit/8bit modes.
Signed-off-by: default avatarZhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 38413ce3
...@@ -77,6 +77,8 @@ ...@@ -77,6 +77,8 @@
#define JZ_MMC_CMDAT_IO_ABORT BIT(11) #define JZ_MMC_CMDAT_IO_ABORT BIT(11)
#define JZ_MMC_CMDAT_BUS_WIDTH_4BIT BIT(10) #define JZ_MMC_CMDAT_BUS_WIDTH_4BIT BIT(10)
#define JZ_MMC_CMDAT_BUS_WIDTH_8BIT (BIT(10) | BIT(9))
#define JZ_MMC_CMDAT_BUS_WIDTH_MASK (BIT(10) | BIT(9))
#define JZ_MMC_CMDAT_DMA_EN BIT(8) #define JZ_MMC_CMDAT_DMA_EN BIT(8)
#define JZ_MMC_CMDAT_INIT BIT(7) #define JZ_MMC_CMDAT_INIT BIT(7)
#define JZ_MMC_CMDAT_BUSY BIT(6) #define JZ_MMC_CMDAT_BUSY BIT(6)
...@@ -895,11 +897,16 @@ static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) ...@@ -895,11 +897,16 @@ static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
switch (ios->bus_width) { switch (ios->bus_width) {
case MMC_BUS_WIDTH_1: case MMC_BUS_WIDTH_1:
host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_4BIT; host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK;
break; break;
case MMC_BUS_WIDTH_4: case MMC_BUS_WIDTH_4:
host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK;
host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_4BIT; host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_4BIT;
break; break;
case MMC_BUS_WIDTH_8:
host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK;
host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_8BIT;
break;
default: default:
break; break;
} }
...@@ -1029,7 +1036,8 @@ static int jz4740_mmc_probe(struct platform_device* pdev) ...@@ -1029,7 +1036,8 @@ static int jz4740_mmc_probe(struct platform_device* pdev)
dev_info(&pdev->dev, "Using %s, %d-bit mode\n", dev_info(&pdev->dev, "Using %s, %d-bit mode\n",
host->use_dma ? "DMA" : "PIO", host->use_dma ? "DMA" : "PIO",
(mmc->caps & MMC_CAP_4_BIT_DATA) ? 4 : 1); (mmc->caps & MMC_CAP_8_BIT_DATA) ? 8 :
((mmc->caps & MMC_CAP_4_BIT_DATA) ? 4 : 1));
return 0; return 0;
......
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