BWN_PHY0
phy0 = BWN_READ_2(mac, BWN_PHY0);
BWN_WRITE_2(mac, BWN_PHY0, BWN_READ_2(mac, BWN_PHY0) & 0xffdf);
BWN_WRITE_2(mac, BWN_PHY0,
(BWN_READ_2(mac, BWN_PHY0) & 0xfff0) | bbatt);
BWN_WRITE_2(mac, BWN_PHY0, on ? 0 : 0xf4);