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| author | Zhou Yanjie <zhouyanjie@zoho.com> | 2019-10-12 13:13:15 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-11-13 16:10:16 +0100 |
| commit | a02f8f48c194ba6bcbec780b720c3d5df4b0c25c (patch) | |
| tree | 0e29d0c5988ae07096692202270e406134e504d3 | |
| parent | 38413ce39a4bd908c02257cd2f9e0c92b27886f4 (diff) | |
| download | linux-a02f8f48c194ba6bcbec780b720c3d5df4b0c25c.tar.gz linux-a02f8f48c194ba6bcbec780b720c3d5df4b0c25c.tar.bz2 linux-a02f8f48c194ba6bcbec780b720c3d5df4b0c25c.zip | |
mmc: jz4740: Add 8bit mode support
Add support for 8bit mode, now supports 1bit/4bit/8bit modes.
Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/jz4740_mmc.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c index f816c06ef916..a488203228bd 100644 --- a/drivers/mmc/host/jz4740_mmc.c +++ b/drivers/mmc/host/jz4740_mmc.c @@ -77,6 +77,8 @@ #define JZ_MMC_CMDAT_IO_ABORT BIT(11) #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_INIT BIT(7) #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) switch (ios->bus_width) { case MMC_BUS_WIDTH_1: - host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_4BIT; + host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK; break; case MMC_BUS_WIDTH_4: + host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK; host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_4BIT; break; + case MMC_BUS_WIDTH_8: + host->cmdat &= ~JZ_MMC_CMDAT_BUS_WIDTH_MASK; + host->cmdat |= JZ_MMC_CMDAT_BUS_WIDTH_8BIT; + break; default: break; } @@ -1029,7 +1036,8 @@ static int jz4740_mmc_probe(struct platform_device* pdev) dev_info(&pdev->dev, "Using %s, %d-bit mode\n", 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; |