IER_ERXRDY
if (ISSET(sc->sc_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS | IER_EMSC))
if (ISSET(sc->sc_imr, IER_ERXRDY | IER_ETXRDY | IER_ERLS | IER_EMSC))
bus_space_write_1(bst, bsh, com_ier, IER_ERXRDY | IER_ETXRDY);
sc->sc_ier = IER_ERXRDY | IER_ERLS;
if (ISSET(sc->sc_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS | IER_EMSC))
SET(sc->sc_ier, IER_ERXRDY);
CLR(sc->sc_ier, IER_ERXRDY|IER_ERXTOUT);
IER_ERXRDY | IER_ERXTOUT);
CLR(sc->sc_ier, IER_ERXRDY);