UCDC_LINE_DTR
SET(val, UCDC_LINE_DTR);
if (onoff && (sc->sc_lcr & UCDC_LINE_DTR))
if (!onoff && !(sc->sc_lcr & UCDC_LINE_DTR))
sc->sc_lcr = onoff ? sc->sc_lcr | UCDC_LINE_DTR
: sc->sc_lcr & ~UCDC_LINE_DTR;
ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) |
ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) |