mci_fifo_writew
mci_fifo_writew(host->fifo_reg, host->part_buf16);
mci_fifo_writew(host->fifo_reg, aligned_buf[i]);
mci_fifo_writew(host->fifo_reg, *pdata++);
mci_fifo_writew(host->fifo_reg, host->part_buf16);