And remove a magic number in the process.
Signed-off-by: Ian Campbell <i...@hellion.org.uk>
---
arch/arm/include/asm/arch-sunxi/mmc.h | 1 +
drivers/mmc/sunxi_mmc.c | 18 ++++++++++++++----
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/arch/arm/include/asm/arch-sunxi/mmc.h
b/arch/arm/include/asm/arch-sunxi/mmc.h
index 1c19f85..6385bc9 100644
--- a/arch/arm/include/asm/arch-sunxi/mmc.h
+++ b/arch/arm/include/asm/arch-sunxi/mmc.h
@@ -57,6 +57,7 @@ struct sunxi_mmc {
SUNXI_MMC_GCTRL_FIFO_RESET|\
SUNXI_MMC_GCTRL_DMA_RESET)
#define SUNXI_MMC_GCTRL_DMA_ENABLE (0x1 << 5)
+#define SUNXI_MMC_GCTRL_ACCESS_BY_AHB (0x1 << 31)
#define SUNXI_MMC_CMD_RESP_EXPIRE (0x1 << 6)
#define SUNXI_MMC_CMD_LONG_RESPONSE (0x1 << 7)
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index d2a82bf..d520599 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -419,6 +419,18 @@ static int mmc_trans_data_by_dma(struct mmc *mmc, struct
mmc_data *data)
return 0;
}
+static void mmc_enable_dma_accesses(struct mmc *mmc, int dma)
+{
+ struct sunxi_mmc_host *mmchost = (struct sunxi_mmc_host *)mmc->priv;
+
+ unsigned int gctrl = readl(&mmchost->reg->gctrl);
+ if (dma)
+ gctrl &= ~SUNXI_MMC_GCTRL_ACCESS_BY_AHB;
+ else
+ gctrl |= SUNXI_MMC_GCTRL_ACCESS_BY_AHB;
+ writel(gctrl, &mmchost->reg->gctrl);
+}
+
static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
struct mmc_data *data)
{
@@ -484,13 +496,11 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd
*cmd,
if (0) {
#endif
usedma = 1;
- writel(readl(&mmchost->reg->gctrl) & ~(0x1 << 31),
- &mmchost->reg->gctrl);
+ mmc_enable_dma_accesses(mmc, 1);
ret = mmc_trans_data_by_dma(mmc, data);
writel(cmdval | cmd->cmdidx, &mmchost->reg->cmd);
} else {
- writel(readl(&mmchost->reg->gctrl) | 0x1 << 31,
- &mmchost->reg->gctrl);
+ mmc_enable_dma_accesses(mmc, 0);
writel(cmdval | cmd->cmdidx, &mmchost->reg->cmd);
ret = mmc_trans_data_by_cpu(mmc, data);
}
--
1.8.5.3
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