SDI_RSP0
w[3] = bus_space_read_4(sc->iot, sc->ioh, SDI_RSP0);
cmd->c_resp[0] = bus_space_read_4(sc->iot, sc->ioh, SDI_RSP0);
w[3] = SDI_REG(SDI_RSP0);
cmd->c_resp[0] = SDI_REG(SDI_RSP0);