DZ_UBA_CSR
sc->sc_dr.dr_csr = DZ_UBA_CSR;
bus_space_write_2(iot, ioh, DZ_UBA_CSR, DZ_CSR_MSE | DZ_CSR_TXIE);
bus_space_write_2(iot, ioh, DZ_UBA_CSR, DZ_CSR_RESET);
if ((bus_space_read_2(iot, ioh, DZ_UBA_CSR)&DZ_CSR_RESET) == 0)