TCIC_R_IENA
val = bus_space_read_1(iot, ioh, TCIC_R_IENA);
reg = tcic_read_1(&sc->handle[0], TCIC_R_IENA);
tcic_write_1(&sc->handle[0], TCIC_R_IENA,
reg = tcic_read_2(h, TCIC_R_IENA);
tcic_write_2(h, TCIC_R_IENA, reg |= TCIC_IENA_CDCHG);