SDDMA_CCR
status = readl(priv->sdmmc_base + SDDMA_CCR) & 0x0F;
writel(0x00, priv->sdmmc_base + SDDMA_CCR);
reg_tmp = readl(priv->sdmmc_base + SDDMA_CCR);
SDDMA_CCR);
reg_tmp = readl(priv->sdmmc_base + SDDMA_CCR);
SDDMA_CCR);
reg_tmp = readl(priv->sdmmc_base + SDDMA_CCR);
writel(reg_tmp | DMA_CCR_RUN, priv->sdmmc_base + SDDMA_CCR);