AUPSC_SEL
rv = bus_space_read_4(sc->sc_bust, sc->sc_bush, AUPSC_SEL);
AUPSC_SEL, (rv & AUPSC_SEL_PS(AUPSC_SEL_DISABLE)));
AUPSC_SEL, AUPSC_SEL_PS(proto));
AUPSC_SEL, AUPSC_SEL_PS(AUPSC_SEL_DISABLE));