REG_CONTROL
control = RD4(sc, REG_CONTROL);
WR4(sc, REG_CONTROL, control);
WR4(sc, REG_CONTROL, control);
control = RD4(sc, REG_CONTROL);
WR4(sc, REG_CONTROL, control);
WR4(sc, REG_CONTROL, control);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, REG_CONTROL, CTRL_ENBL);