RT3290_WLAN_CTRL
tmp = RAL_READ(sc, RT3290_WLAN_CTRL);
RAL_WRITE(sc, RT3290_WLAN_CTRL, tmp);
tmp = RAL_READ(sc, RT3290_WLAN_CTRL);
RAL_WRITE(sc, RT3290_WLAN_CTRL, tmp);
RAL_WRITE(sc, RT3290_WLAN_CTRL, tmp);
if (!(RAL_READ(sc, RT3290_WLAN_CTRL) & RT3290_RADIO_EN)) {