IER_ETXRDY
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);
if (ISSET(sc->sc_ier, IER_ETXRDY))
if (ISSET(sc->sc_ier, IER_ETXRDY))
if (ISSET(sc->sc_ier, IER_ERXRDY | IER_ETXRDY | IER_ERLS | IER_EMSC))
if (!ISSET(sc->sc_ier, IER_ETXRDY)) {
SET(sc->sc_ier, IER_ETXRDY);
if (ISSET(sc->sc_ier, IER_ETXRDY)) {
CLR(sc->sc_ier, IER_ETXRDY);