BCM_DMA_CS
cs = bus_read_4(sc->sc_mem, BCM_DMA_CS(ch));
bus_write_4(sc->sc_mem, BCM_DMA_CS(ch), 0);
cs = bus_read_4(sc->sc_mem, BCM_DMA_CS(ch));
bus_write_4(sc->sc_mem, BCM_DMA_CS(ch),
bus_write_4(sc->sc_mem, BCM_DMA_CS(i), CS_RESET);
bus_write_4(sc->sc_mem, BCM_DMA_CS(ch), CS_ACTIVE);
cs = bus_read_4(sc->sc_mem, BCM_DMA_CS(ch->ch));
bus_write_4(sc->sc_mem, BCM_DMA_CS(ch->ch),