drivers/net/wireless/ath/ath9k/htc_drv_gpio.c - linux - Git at Google

 /*
  * Copyright (c) 2010-2011 Atheros Communications Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include "htc.h"

 /******************/
 /*     BTCOEX     */
 /******************/

 #define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"

 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT

 /*
  * Detects if there is any priority bt traffic
  */
 static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
 {
 	struct ath_btcoex *btcoex = &priv->btcoex;
 	struct ath_hw *ah = priv->ah;

 	if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
 		btcoex->bt_priority_cnt++;

 	if (time_after(jiffies, btcoex->bt_priority_time +
 			msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
 		clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
 		clear_bit(OP_BT_SCAN, &priv->op_flags);
 		/* Detect if colocated bt started scanning */
 		if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
 			ath_dbg(ath9k_hw_common(ah), BTCOEX,
 				"BT scan detected\n");
 			set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
 			set_bit(OP_BT_SCAN, &priv->op_flags);
 		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
 			ath_dbg(ath9k_hw_common(ah), BTCOEX,
 				"BT priority traffic detected\n");
 			set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
 		}

 		btcoex->bt_priority_cnt = 0;
 		btcoex->bt_priority_time = jiffies;
 	}
 }

 /*
  * This is the master bt coex work which runs for every
  * 45ms, bt traffic will be given priority during 55% of this
  * period while wlan gets remaining 45%
  */
 static void ath_btcoex_period_work(struct work_struct *work)
 {
 	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
 						   coex_period_work.work);
 	struct ath_btcoex *btcoex = &priv->btcoex;
 	struct ath_common *common = ath9k_hw_common(priv->ah);
 	u32 timer_period;
 	int ret;

 	ath_detect_bt_priority(priv);

 	ret = ath9k_htc_update_cap_target(priv,
 			  test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));
 	if (ret) {
 		ath_err(common, "Unable to set BTCOEX parameters\n");
 		return;
 	}

 	ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?
 				 ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);

 	ath9k_hw_btcoex_enable(priv->ah);
 	timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?
 		btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp;
 	ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
 				     msecs_to_jiffies(timer_period));
 	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
 				     msecs_to_jiffies(btcoex->btcoex_period));
 }

 /*
  * Work to time slice between wlan and bt traffic and
  * configure weight registers
  */
 static void ath_btcoex_duty_cycle_work(struct work_struct *work)
 {
 	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
 						   duty_cycle_work.work);
 	struct ath_hw *ah = priv->ah;
 	struct ath_btcoex *btcoex = &priv->btcoex;
 	struct ath_common *common = ath9k_hw_common(ah);

 	ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");

 	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
 	    test_bit(OP_BT_SCAN, &priv->op_flags))
 		ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
 	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
 		ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);

 	ath9k_hw_btcoex_enable(priv->ah);
 }

 static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
 {
 	struct ath_btcoex *btcoex = &priv->btcoex;

 	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
 	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
 		btcoex->btcoex_period / 100;
 	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
 				   btcoex->btcoex_period / 100;
 	INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
 	INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
 }

 /*
  * (Re)start btcoex work
  */

 static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
 {
 	struct ath_btcoex *btcoex = &priv->btcoex;
 	struct ath_hw *ah = priv->ah;

 	ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");

 	btcoex->bt_priority_cnt = 0;
 	btcoex->bt_priority_time = jiffies;
 	clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
 	clear_bit(OP_BT_SCAN, &priv->op_flags);
 	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
 }


 /*
  * Cancel btcoex and bt duty cycle work.
  */
 static void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
 {
 	cancel_delayed_work_sync(&priv->coex_period_work);
 	cancel_delayed_work_sync(&priv->duty_cycle_work);
 }

 void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)
 {
 	struct ath_hw *ah = priv->ah;

 	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {
 		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 					   AR_STOMP_LOW_WLAN_WGHT);
 		ath9k_hw_btcoex_enable(ah);
 		ath_htc_resume_btcoex_work(priv);
 	}
 }

 void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
 {
 	struct ath_hw *ah = priv->ah;

 	if (ah->btcoex_hw.enabled &&
 	    ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
 		ath9k_hw_btcoex_disable(ah);
 		if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 			ath_htc_cancel_btcoex_work(priv);
 	}
 }

 void ath9k_htc_init_btcoex(struct ath9k_htc_priv *priv, char *product)
 {
 	struct ath_hw *ah = priv->ah;
 	int qnum;

 	if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {
 		ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;
 	}

 	switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {
 	case ATH_BTCOEX_CFG_NONE:
 		break;
 	case ATH_BTCOEX_CFG_3WIRE:
 		priv->ah->btcoex_hw.btactive_gpio = 7;
 		priv->ah->btcoex_hw.btpriority_gpio = 6;
 		priv->ah->btcoex_hw.wlanactive_gpio = 8;
 		priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
 		ath9k_hw_btcoex_init_3wire(priv->ah);
 		ath_htc_init_btcoex_work(priv);
 		qnum = priv->hwq_map[WME_AC_BE];
 		ath9k_hw_init_btcoex_hw(priv->ah, qnum);
 		break;
 	default:
 		WARN_ON(1);
 		break;
 	}
 }

 #endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */

 /*******/
 /* LED */
 /*******/

 #ifdef CONFIG_MAC80211_LEDS
 void ath9k_led_work(struct work_struct *work)
 {
 	struct ath9k_htc_priv *priv = container_of(work,
 						   struct ath9k_htc_priv,
 						   led_work);

 	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
 			  (priv->brightness == LED_OFF));
 }

 static void ath9k_led_brightness(struct led_classdev *led_cdev,
 				 enum led_brightness brightness)
 {
 	struct ath9k_htc_priv *priv = container_of(led_cdev,
 						   struct ath9k_htc_priv,
 						   led_cdev);

 	/* Not locked, but it's just a tiny green light..*/
 	priv->brightness = brightness;
 	ieee80211_queue_work(priv->hw, &priv->led_work);
 }

 void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
 {
 	if (!priv->led_registered)
 		return;

 	ath9k_led_brightness(&priv->led_cdev, LED_OFF);
 	led_classdev_unregister(&priv->led_cdev);
 	cancel_work_sync(&priv->led_work);
 }

 void ath9k_init_leds(struct ath9k_htc_priv *priv)
 {
 	int ret;

 	if (AR_SREV_9287(priv->ah))
 		priv->ah->led_pin = ATH_LED_PIN_9287;
 	else if (AR_SREV_9271(priv->ah))
 		priv->ah->led_pin = ATH_LED_PIN_9271;
 	else if (AR_DEVID_7010(priv->ah))
 		priv->ah->led_pin = ATH_LED_PIN_7010;
 	else
 		priv->ah->led_pin = ATH_LED_PIN_DEF;

 	/* Configure gpio 1 for output */
 	ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin,
 			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 	/* LED off, active low */
 	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);

 	snprintf(priv->led_name, sizeof(priv->led_name),
 		"ath9k_htc-%s", wiphy_name(priv->hw->wiphy));
 	priv->led_cdev.name = priv->led_name;
 	priv->led_cdev.brightness_set = ath9k_led_brightness;

 	ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);
 	if (ret < 0)
 		return;

 	INIT_WORK(&priv->led_work, ath9k_led_work);
 	priv->led_registered = true;

 	return;
 }
 #endif

 /*******************/
 /*	Rfkill	   */
 /*******************/

 static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
 {
 	bool is_blocked;

 	ath9k_htc_ps_wakeup(priv);
 	is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
 						 priv->ah->rfkill_polarity;
 	ath9k_htc_ps_restore(priv);

 	return is_blocked;
 }

 void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)
 {
 	struct ath9k_htc_priv *priv = hw->priv;
 	bool blocked = !!ath_is_rfkill_set(priv);

 	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 }

 void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)
 {
 	if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
 		wiphy_rfkill_start_polling(priv->hw->wiphy);
 }
	/*
	* Copyright (c) 2010-2011 Atheros Communications Inc.
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include "htc.h"

	/******************/
	/* BTCOEX */
	/******************/

	#define ATH_HTC_BTCOEX_PRODUCT_ID "wb193"

	#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT

	/*
	* Detects if there is any priority bt traffic
	*/
	static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
	{
	struct ath_btcoex *btcoex = &priv->btcoex;
	struct ath_hw *ah = priv->ah;

	if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
	btcoex->bt_priority_cnt++;

	if (time_after(jiffies, btcoex->bt_priority_time +
	msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
	clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
	clear_bit(OP_BT_SCAN, &priv->op_flags);
	/* Detect if colocated bt started scanning */
	if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
	ath_dbg(ath9k_hw_common(ah), BTCOEX,
	"BT scan detected\n");
	set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
	set_bit(OP_BT_SCAN, &priv->op_flags);
	} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
	ath_dbg(ath9k_hw_common(ah), BTCOEX,
	"BT priority traffic detected\n");
	set_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
	}

	btcoex->bt_priority_cnt = 0;
	btcoex->bt_priority_time = jiffies;
	}
	}

	/*
	* This is the master bt coex work which runs for every
	* 45ms, bt traffic will be given priority during 55% of this
	* period while wlan gets remaining 45%
	*/
	static void ath_btcoex_period_work(struct work_struct *work)
	{
	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
	coex_period_work.work);
	struct ath_btcoex *btcoex = &priv->btcoex;
	struct ath_common *common = ath9k_hw_common(priv->ah);
	u32 timer_period;
	int ret;

	ath_detect_bt_priority(priv);

	ret = ath9k_htc_update_cap_target(priv,
	test_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags));
	if (ret) {
	ath_err(common, "Unable to set BTCOEX parameters\n");
	return;
	}

	ath9k_hw_btcoex_bt_stomp(priv->ah, test_bit(OP_BT_SCAN, &priv->op_flags) ?
	ATH_BTCOEX_STOMP_ALL : btcoex->bt_stomp_type);

	ath9k_hw_btcoex_enable(priv->ah);
	timer_period = test_bit(OP_BT_SCAN, &priv->op_flags) ?
	btcoex->btscan_no_stomp : btcoex->btcoex_no_stomp;
	ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
	msecs_to_jiffies(timer_period));
	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
	msecs_to_jiffies(btcoex->btcoex_period));
	}

	/*
	* Work to time slice between wlan and bt traffic and
	* configure weight registers
	*/
	static void ath_btcoex_duty_cycle_work(struct work_struct *work)
	{
	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
	duty_cycle_work.work);
	struct ath_hw *ah = priv->ah;
	struct ath_btcoex *btcoex = &priv->btcoex;
	struct ath_common *common = ath9k_hw_common(ah);

	ath_dbg(common, BTCOEX, "time slice work for bt and wlan\n");

	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW \|\|
	test_bit(OP_BT_SCAN, &priv->op_flags))
	ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
	ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);

	ath9k_hw_btcoex_enable(priv->ah);
	}

	static void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
	{
	struct ath_btcoex *btcoex = &priv->btcoex;

	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
	btcoex->btcoex_period / 100;
	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
	btcoex->btcoex_period / 100;
	INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
	INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
	}

	/*
	* (Re)start btcoex work
	*/

	static void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
	{
	struct ath_btcoex *btcoex = &priv->btcoex;
	struct ath_hw *ah = priv->ah;

	ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex work\n");

	btcoex->bt_priority_cnt = 0;
	btcoex->bt_priority_time = jiffies;
	clear_bit(OP_BT_PRIORITY_DETECTED, &priv->op_flags);
	clear_bit(OP_BT_SCAN, &priv->op_flags);
	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
	}


	/*
	* Cancel btcoex and bt duty cycle work.
	*/
	static void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
	{
	cancel_delayed_work_sync(&priv->coex_period_work);
	cancel_delayed_work_sync(&priv->duty_cycle_work);
	}

	void ath9k_htc_start_btcoex(struct ath9k_htc_priv *priv)
	{
	struct ath_hw *ah = priv->ah;

	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE) {
	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	AR_STOMP_LOW_WLAN_WGHT);
	ath9k_hw_btcoex_enable(ah);
	ath_htc_resume_btcoex_work(priv);
	}
	}

	void ath9k_htc_stop_btcoex(struct ath9k_htc_priv *priv)
	{
	struct ath_hw *ah = priv->ah;

	if (ah->btcoex_hw.enabled &&
	ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
	ath9k_hw_btcoex_disable(ah);
	if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
	ath_htc_cancel_btcoex_work(priv);
	}
	}

	void ath9k_htc_init_btcoex(struct ath9k_htc_priv priv, char product)
	{
	struct ath_hw *ah = priv->ah;
	int qnum;

	if (product && strncmp(product, ATH_HTC_BTCOEX_PRODUCT_ID, 5) == 0) {
	ah->btcoex_hw.scheme = ATH_BTCOEX_CFG_3WIRE;
	}

	switch (ath9k_hw_get_btcoex_scheme(priv->ah)) {
	case ATH_BTCOEX_CFG_NONE:
	break;
	case ATH_BTCOEX_CFG_3WIRE:
	priv->ah->btcoex_hw.btactive_gpio = 7;
	priv->ah->btcoex_hw.btpriority_gpio = 6;
	priv->ah->btcoex_hw.wlanactive_gpio = 8;
	priv->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
	ath9k_hw_btcoex_init_3wire(priv->ah);
	ath_htc_init_btcoex_work(priv);
	qnum = priv->hwq_map[WME_AC_BE];
	ath9k_hw_init_btcoex_hw(priv->ah, qnum);
	break;
	default:
	WARN_ON(1);
	break;
	}
	}

	#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */

	/*******/
	/* LED */
	/*******/

	#ifdef CONFIG_MAC80211_LEDS
	void ath9k_led_work(struct work_struct *work)
	{
	struct ath9k_htc_priv *priv = container_of(work,
	struct ath9k_htc_priv,
	led_work);

	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin,
	(priv->brightness == LED_OFF));
	}

	static void ath9k_led_brightness(struct led_classdev *led_cdev,
	enum led_brightness brightness)
	{
	struct ath9k_htc_priv *priv = container_of(led_cdev,
	struct ath9k_htc_priv,
	led_cdev);

	/* Not locked, but it's just a tiny green light..*/
	priv->brightness = brightness;
	ieee80211_queue_work(priv->hw, &priv->led_work);
	}

	void ath9k_deinit_leds(struct ath9k_htc_priv *priv)
	{
	if (!priv->led_registered)
	return;

	ath9k_led_brightness(&priv->led_cdev, LED_OFF);
	led_classdev_unregister(&priv->led_cdev);
	cancel_work_sync(&priv->led_work);
	}

	void ath9k_init_leds(struct ath9k_htc_priv *priv)
	{
	int ret;

	if (AR_SREV_9287(priv->ah))
	priv->ah->led_pin = ATH_LED_PIN_9287;
	else if (AR_SREV_9271(priv->ah))
	priv->ah->led_pin = ATH_LED_PIN_9271;
	else if (AR_DEVID_7010(priv->ah))
	priv->ah->led_pin = ATH_LED_PIN_7010;
	else
	priv->ah->led_pin = ATH_LED_PIN_DEF;

	/* Configure gpio 1 for output */
	ath9k_hw_cfg_output(priv->ah, priv->ah->led_pin,
	AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
	/* LED off, active low */
	ath9k_hw_set_gpio(priv->ah, priv->ah->led_pin, 1);

	snprintf(priv->led_name, sizeof(priv->led_name),
	"ath9k_htc-%s", wiphy_name(priv->hw->wiphy));
	priv->led_cdev.name = priv->led_name;
	priv->led_cdev.brightness_set = ath9k_led_brightness;

	ret = led_classdev_register(wiphy_dev(priv->hw->wiphy), &priv->led_cdev);
	if (ret < 0)
	return;

	INIT_WORK(&priv->led_work, ath9k_led_work);
	priv->led_registered = true;

	return;
	}
	#endif

	/*******************/
	/* Rfkill */
	/*******************/

	static bool ath_is_rfkill_set(struct ath9k_htc_priv *priv)
	{
	bool is_blocked;

	ath9k_htc_ps_wakeup(priv);
	is_blocked = ath9k_hw_gpio_get(priv->ah, priv->ah->rfkill_gpio) ==
	priv->ah->rfkill_polarity;
	ath9k_htc_ps_restore(priv);

	return is_blocked;
	}

	void ath9k_htc_rfkill_poll_state(struct ieee80211_hw *hw)
	{
	struct ath9k_htc_priv *priv = hw->priv;
	bool blocked = !!ath_is_rfkill_set(priv);

	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
	}

	void ath9k_start_rfkill_poll(struct ath9k_htc_priv *priv)
	{
	if (priv->ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
	wiphy_rfkill_start_polling(priv->hw->wiphy);
	}