DMAC_CS
val = bcmdmac_read(sc, DMAC_CS(index));
bcmdmac_write(sc, DMAC_CS(index), val);
cs = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
bcmdmac_write(sc, DMAC_CS(ch->ch_index), cs);
val = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
bcmdmac_write(sc, DMAC_CS(ch->ch_index), val);
val = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
bcmdmac_write(sc, DMAC_CS(ch->ch_index), val);
val = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
bcmdmac_write(sc, DMAC_CS(ch->ch_index), val);
bcmdmac_write(sc, DMAC_CS(ch->ch_index), val);