at91pio_in
at91pio_in(sc, bit); /* make sure pin is input */
void at91pio_in(struct at91pio_softc *, int bit);
at91pio_in(sc->sc_pioc, 3); // CFIRQ
at91pio_in(sc->sc_pioc, 4); // CFCD
at91pio_in(sc->sc_piob, PB_CTS1);
at91pio_in(sc->sc_piod, PD_DSR1);
at91pio_in(sc->sc_piob, PB_CTS2);
at91pio_in(sc->sc_piod, PD_DSR2);
at91pio_in(sc->sc_piob, PB_CTS3);
at91pio_in(sc->sc_piod, PD_DSR3);
at91pio_in(sc->sc_pioa, PA_TXD4);
at91pio_in(sc->sc_piob, PB_RTS4);
at91pio_in(sc->sc_piob, PB_CTS4);
at91pio_in(sc->sc_piod, PD_DTR4);
at91pio_in(sc->sc_piod, PD_DSR4);
at91pio_in(sc->sc_piod, PD_DCD4);
at91pio_in(sc->sc_piob, PB_RTS4);
at91pio_in(sc->sc_piod, PD_DTR4);