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/*
* 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 "ath5k.h"
static inline void ath5k_rfkill_disable(struct ath5k_hw *ah)
{
ATH5K_DBG(ah, ATH5K_DEBUG_ANY, "rfkill disable (gpio:%d polarity:%d)\n",
ah->rf_kill.gpio, ah->rf_kill.polarity);
ath5k_hw_set_gpio_output(ah, ah->rf_kill.gpio);
ath5k_hw_set_gpio(ah, ah->rf_kill.gpio, !ah->rf_kill.polarity);
}
static inline void ath5k_rfkill_enable(struct ath5k_hw *ah)
{
ATH5K_DBG(ah, ATH5K_DEBUG_ANY, "rfkill enable (gpio:%d polarity:%d)\n",
ah->rf_kill.gpio, ah->rf_kill.polarity);
ath5k_hw_set_gpio_output(ah, ah->rf_kill.gpio);
ath5k_hw_set_gpio(ah, ah->rf_kill.gpio, ah->rf_kill.polarity);
}
static inline void ath5k_rfkill_set_intr(struct ath5k_hw *ah, bool enable)
{
u32 curval;
ath5k_hw_set_gpio_input(ah, ah->rf_kill.gpio);
curval = ath5k_hw_get_gpio(ah, ah->rf_kill.gpio);
ath5k_hw_set_gpio_intr(ah, ah->rf_kill.gpio, enable ?
!!curval : !curval);
}
static bool
ath5k_is_rfkill_set(struct ath5k_hw *ah)
{
/* configuring GPIO for input for some reason disables rfkill */
/*ath5k_hw_set_gpio_input(ah, ah->rf_kill.gpio);*/
return ath5k_hw_get_gpio(ah, ah->rf_kill.gpio) ==
ah->rf_kill.polarity;
}
static void
ath5k_tasklet_rfkill_toggle(unsigned long data)
{
struct ath5k_hw *ah = (void *)data;
bool blocked;
blocked = ath5k_is_rfkill_set(ah);
wiphy_rfkill_set_hw_state(ah->hw->wiphy, blocked);
}
void
ath5k_rfkill_hw_start(struct ath5k_hw *ah)
{
/* read rfkill GPIO configuration from EEPROM header */
ah->rf_kill.gpio = ah->ah_capabilities.cap_eeprom.ee_rfkill_pin;
ah->rf_kill.polarity = ah->ah_capabilities.cap_eeprom.ee_rfkill_pol;
tasklet_init(&ah->rf_kill.toggleq, ath5k_tasklet_rfkill_toggle,
(unsigned long)ah);
ath5k_rfkill_disable(ah);
/* enable interrupt for rfkill switch */
if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
ath5k_rfkill_set_intr(ah, true);
}
void
ath5k_rfkill_hw_stop(struct ath5k_hw *ah)
{
/* disable interrupt for rfkill switch */
if (AR5K_EEPROM_HDR_RFKILL(ah->ah_capabilities.cap_eeprom.ee_header))
ath5k_rfkill_set_intr(ah, false);
tasklet_kill(&ah->rf_kill.toggleq);
/* enable RFKILL when stopping HW so Wifi LED is turned off */
ath5k_rfkill_enable(ah);
}
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