INTR_TRANSMIT
iicbus_intr(sc->iicbus, INTR_TRANSMIT, &data);
case INTR_TRANSMIT:
case INTR_TRANSMIT:
iicbus_intr(sc->iicbus, INTR_TRANSMIT, &data);
iicbus_intr(sc->iicbus, INTR_TRANSMIT, &data);