FMBM_RCFG
reg = bus_read_4(sc->sc_mem, FMBM_RCFG);
bus_write_4(sc->sc_mem, FMBM_RCFG, reg & ~BMI_PORT_CFG_EN);
reg = bus_read_4(sc->sc_mem, FMBM_RCFG);
bus_write_4(sc->sc_mem, FMBM_RCFG, reg | BMI_PORT_CFG_EN);