UBTBCMFW_INTR_DT_RD
[UBTBCMFW_INTR_DT_RD] = {
usbd_transfer_start(sc->sc_xfer[UBTBCMFW_INTR_DT_RD]);
usbd_transfer_stop(sc->sc_xfer[UBTBCMFW_INTR_DT_RD]);
xfer = sc->sc_xfer[UBTBCMFW_INTR_DT_RD];