sunscpal_pio_out
len = sunscpal_pio_out(sc, SUNSCPAL_PHASE_COMMAND, xs->cmdlen,
sunscpal_pio_out(sc, phase, 4096, NULL);
len = sunscpal_pio_out(sc, phase,
int sunscpal_pio_out(struct sunscpal_softc *, int, int, uint8_t *);