write_iob_reg
write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG,
write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno),
write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno),
write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg);
write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg);
write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0);
write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg);
write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg);