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Subject[PATCH 1/6 v2] MMC: Ingenic: Add 8bit mode support.
Date
Add support for 8bit mode, now supports 1bit/4bit/8bit modes.

Signed-off-by: Zhou Yanjie <zhouyanjie@zoho.com>
---
drivers/mmc/host/jz4740_mmc.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
index ffdbfaa..69c4a8b 100644
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c
@@ -79,6 +79,8 @@

#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)
@@ -899,11 +901,16 @@ 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;
}
@@ -1034,7 +1041,8 @@ 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;

--
2.7.4

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