TPM_CRB_CTRL_REQ
r = bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_CRB_CTRL_REQ);
bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_CRB_CTRL_REQ,
r = bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_CRB_CTRL_REQ);
bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_CRB_CTRL_REQ,
r = bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_CRB_CTRL_REQ);
bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_CRB_CTRL_REQ,