1 /* 2 * RFKILL support for ath5k 3 * 4 * Copyright (c) 2009 Tobias Doerffel <tobias.doerffel (at) gmail.com> 5 * Lightly modified for gPXE, Sep 2008 by Joshua Oreman <oremanj (at) rwcr.net> 6 * 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer, 14 * without modification. 15 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 16 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 17 * redistribution must be conditioned upon including a substantially 18 * similar Disclaimer requirement for further binary redistribution. 19 * 3. Neither the names of the above-listed copyright holders nor the names 20 * of any contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * NO WARRANTY 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 28 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 29 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 32 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 34 * THE POSSIBILITY OF SUCH DAMAGES. 35 */ 36 37 FILE_LICENCE ( MIT ); 38 39 #include "base.h" 40 41 42 static inline void ath5k_rfkill_disable(struct ath5k_softc *sc) 43 { 44 DBG("ath5k: rfkill disable (gpio:%d polarity:%d)\n", 45 sc->rf_kill.gpio, sc->rf_kill.polarity); 46 ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio); 47 ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, !sc->rf_kill.polarity); 48 } 49 50 51 static inline void ath5k_rfkill_enable(struct ath5k_softc *sc) 52 { 53 DBG("ath5k: rfkill enable (gpio:%d polarity:%d)\n", 54 sc->rf_kill.gpio, sc->rf_kill.polarity); 55 ath5k_hw_set_gpio_output(sc->ah, sc->rf_kill.gpio); 56 ath5k_hw_set_gpio(sc->ah, sc->rf_kill.gpio, sc->rf_kill.polarity); 57 } 58 59 static inline void ath5k_rfkill_set_intr(struct ath5k_softc *sc, int enable) 60 { 61 struct ath5k_hw *ah = sc->ah; 62 u32 curval; 63 64 ath5k_hw_set_gpio_input(ah, sc->rf_kill.gpio); 65 curval = ath5k_hw_get_gpio(ah, sc->rf_kill.gpio); 66 ath5k_hw_set_gpio_intr(ah, sc->rf_kill.gpio, enable ? 67 !!curval : !curval); 68 } 69 70 static int __unused 71 ath5k_is_rfkill_set(struct ath5k_softc *sc) 72 { 73 /* configuring GPIO for input for some reason disables rfkill */ 74 /*ath5k_hw_set_gpio_input(sc->ah, sc->rf_kill.gpio);*/ 75 return (ath5k_hw_get_gpio(sc->ah, sc->rf_kill.gpio) == 76 sc->rf_kill.polarity); 77 } 78 79 void 80 ath5k_rfkill_hw_start(struct ath5k_hw *ah) 81 { 82 struct ath5k_softc *sc = ah->ah_sc; 83 84 /* read rfkill GPIO configuration from EEPROM header */ 85 sc->rf_kill.gpio = ah->ah_capabilities.cap_eeprom.ee_rfkill_pin; 86 sc->rf_kill.polarity = ah->ah_capabilities.cap_eeprom.ee_rfkill_pol; 87 88 ath5k_rfkill_disable(sc); 89 90 /* enable interrupt for rfkill switch */ 91 if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header)) 92 ath5k_rfkill_set_intr(sc, 1); 93 } 94 95 96 void 97 ath5k_rfkill_hw_stop(struct ath5k_hw *ah) 98 { 99 struct ath5k_softc *sc = ah->ah_sc; 100 101 /* disable interrupt for rfkill switch */ 102 if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header)) 103 ath5k_rfkill_set_intr(sc, 0); 104 105 /* enable RFKILL when stopping HW so Wifi LED is turned off */ 106 ath5k_rfkill_enable(sc); 107 } 108
