mci_fifo_l_writeq
mci_fifo_l_writeq(host->fifo_reg, host->part_buf);
mci_fifo_l_writeq(host->fifo_reg, aligned_buf[i]);
mci_fifo_l_writeq(host->fifo_reg, *pdata++);
mci_fifo_l_writeq(host->fifo_reg, host->part_buf);