DA_STATE_PROBE_RC
softc->state = DA_STATE_PROBE_RC;
softc->state = DA_STATE_PROBE_RC;
case DA_STATE_PROBE_RC:
softc->state = DA_STATE_PROBE_RC;
KASSERT(softc->state == DA_STATE_PROBE_RC || softc->state == DA_STATE_PROBE_RC16,
softc->state = DA_STATE_PROBE_RC;