APBDMA_CMD_CMDPIOWORDS
__SHIFTIN(req->dreq_datalen, APBDMA_CMD_CMDPIOWORDS) |
__SHIFTIN(0, APBDMA_CMD_CMDPIOWORDS) | dma_dir |
chan->chan_cmds[0].control &= ~APBDMA_CMD_CMDPIOWORDS;
__SHIFTIN(req->dreq_datalen, APBDMA_CMD_CMDPIOWORDS);