rtwn_set_led
rtwn_set_led(sc, RTWN_LED_LINK, 0);
rtwn_set_led(sc, RTWN_LED_LINK, 1);
rtwn_set_led(sc, RTWN_LED_LINK, 0);
rtwn_set_led(sc, RTWN_LED_LINK, 1);
rtwn_set_led(sc, RTWN_LED_LINK, !sc->ledlink);
rtwn_set_led(sc, RTWN_LED_LINK, (sc->vaps_running != 0));