ELINK_W3_MAC_CONTROL
mctl = bus_space_read_2(iot, ioh, ELINK_W3_MAC_CONTROL);
bus_space_write_2(iot, ioh, ELINK_W3_MAC_CONTROL, mctl);
mctl = bus_space_read_2(iot, ioh, ELINK_W3_MAC_CONTROL);
bus_space_write_2(iot, ioh, ELINK_W3_MAC_CONTROL, mctl);
mctl = bus_space_read_2(iot, ioh, ELINK_W3_MAC_CONTROL);
bus_space_write_2(iot, ioh, ELINK_W3_MAC_CONTROL, mctl);
bus_space_write_2(iot, ioh, ELINK_W3_MAC_CONTROL,
bus_space_write_2(iot, ioh, ELINK_W3_MAC_CONTROL, 0);