diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath5k/rfkill.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/rfkill.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath5k/rfkill.c b/drivers/net/wireless/ath/ath5k/rfkill.c new file mode 100644 index 000000000000..41a877b73fce --- /dev/null +++ b/drivers/net/wireless/ath/ath5k/rfkill.c @@ -0,0 +1,121 @@ +/* + * RFKILL support for ath5k + * + * Copyright (c) 2009 Tobias Doerffel <tobias.doerffel@gmail.com> + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any + * redistribution must be conditioned upon including a substantially + * similar Disclaimer requirement for further binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY + * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, + * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER + * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF + * THE POSSIBILITY OF SUCH DAMAGES. + */ + +#include "base.h" + + +static inline void ath5k_rfkill_disable(struct ath5k_softc *sc) +{ + ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "rfkill disable (gpio:%d polarity:%d)\n", + sc->rf_kill.gpio, sc->rf_kill.polarity); + ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio); + ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, !sc->rf_kill.polarity); +} + + +static inline void ath5k_rfkill_enable(struct ath5k_softc *sc) +{ + ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "rfkill enable (gpio:%d polarity:%d)\n", + sc->rf_kill.gpio, sc->rf_kill.polarity); + ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio); + ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, sc->rf_kill.polarity); +} + +static inline void ath5k_rfkill_set_intr(struct ath5k_softc *sc, bool enable) +{ + struct ath5k_hw *ah = sc->ah; + u32 curval; + + ath5k_hw_set_gpio_input(ah, sc->rf_kill.gpio); + curval = ath5k_hw_get_gpio(ah, sc->rf_kill.gpio); + ath5k_hw_set_gpio_intr(ah, sc->rf_kill.gpio, enable ? + !!curval : !curval); +} + +static bool +ath5k_is_rfkill_set(struct ath5k_softc *sc) +{ + /* configuring GPIO for input for some reason disables rfkill */ + /*ath5k_hw_set_gpio_input(sc->ah, sc->rf_kill.gpio);*/ + return ath5k_hw_get_gpio(sc->ah, sc->rf_kill.gpio) == + sc->rf_kill.polarity; +} + +static void +ath5k_tasklet_rfkill_toggle(unsigned long data) +{ + struct ath5k_softc *sc = (void *)data; + bool blocked; + + blocked = ath5k_is_rfkill_set(sc); + wiphy_rfkill_set_hw_state(sc->hw->wiphy, blocked); +} + + +void +ath5k_rfkill_hw_start(struct ath5k_hw *ah) +{ + struct ath5k_softc *sc = ah->ah_sc; + + /* read rfkill GPIO configuration from EEPROM header */ + sc->rf_kill.gpio = ah->ah_capabilities.cap_eeprom.ee_rfkill_pin; + sc->rf_kill.polarity = ah->ah_capabilities.cap_eeprom.ee_rfkill_pol; + + tasklet_init(&sc->rf_kill.toggleq, ath5k_tasklet_rfkill_toggle, + (unsigned long)sc); + + ath5k_rfkill_disable(sc); + + /* enable interrupt for rfkill switch */ + if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header)) + ath5k_rfkill_set_intr(sc, true); +} + + +void +ath5k_rfkill_hw_stop(struct ath5k_hw *ah) +{ + struct ath5k_softc *sc = ah->ah_sc; + + /* disable interrupt for rfkill switch */ + if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header)) + ath5k_rfkill_set_intr(sc, false); + + tasklet_kill(&sc->rf_kill.toggleq); + + /* enable RFKILL when stopping HW so Wifi LED is turned off */ + ath5k_rfkill_enable(sc); +} + |