XFER_CTR
dev_dbg(dev, ": XFER_CTR: %x", readl(acdev->vbase + XFER_CTR));
xfer_ctr = readl(acdev->vbase + XFER_CTR) &
acdev->vbase + XFER_CTR);
writel(readl(acdev->vbase + XFER_CTR) & ~XFER_START,
acdev->vbase + XFER_CTR);
writel(readl(acdev->vbase + XFER_CTR) & ~XFER_START,
acdev->vbase + XFER_CTR);
writel(readl(acdev->vbase + XFER_CTR) & ~XFER_START,
acdev->vbase + XFER_CTR);
u32 xfer_ctr = readl(acdev->vbase + XFER_CTR) & ~XFER_DIR_MASK;
writel(xfer_ctr, acdev->vbase + XFER_CTR);
writel(DMA_XFER_MODE, acdev->vbase + XFER_CTR);