From a02f8f48c194ba6bcbec780b720c3d5df4b0c25c Mon Sep 17 00:00:00 2001 From: Zhou Yanjie Date: Sat, 12 Oct 2019 13:13:15 +0800 Subject: mmc: jz4740: Add 8bit mode support Add support for 8bit mode, now supports 1bit/4bit/8bit modes. Signed-off-by: Zhou Yanjie Signed-off-by: Ulf Hansson --- drivers/mmc/host/jz4740_mmc.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'drivers/mmc') 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; -- cgit v1.2.3