MOUSEBTN_PIN_RIGHT
caps = gpio_pin_caps(sc->sc_gpio, &sc->sc_map, MOUSEBTN_PIN_RIGHT);
gpio_pin_ctl(sc->sc_gpio, &sc->sc_map, MOUSEBTN_PIN_RIGHT,
right = !gpio_pin_read(sc->sc_gpio, &sc->sc_map, MOUSEBTN_PIN_RIGHT);