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