bcmdmac_read
ch->ch_debug = bcmdmac_read(sc, DMAC_DEBUG(index));
val = bcmdmac_read(sc, DMAC_CS(index));
cs = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
ce = bcmdmac_read(sc, DMAC_DEBUG(ch->ch_index));
val = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
val = bcmdmac_read(sc, DMAC_CS(ch->ch_index));
val = bcmdmac_read(sc, DMAC_CS(ch->ch_index));