MMCIFIFO
.src_addr = host->phybase + MMCIFIFO,
.dst_addr = host->phybase + MMCIFIFO,
ioread32_rep(base + MMCIFIFO, buf, 1);
ioread32_rep(base + MMCIFIFO, ptr, count >> 2);
ioread32_rep(base + MMCIFIFO, ptr, count >> 2);
iowrite32_rep(base + MMCIFIFO, ptr, (count + 3) >> 2);