drivers/net/wireless/ath/ath9k/htc_drv_gpio.c - maze/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     */
 /******************/

 /*
  * 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))) {
 		priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN);
 		/* Detect if colocated bt started scanning */
 		if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
 			ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 				"BT scan detected\n");
 			priv->op_flags |= (OP_BT_SCAN |
 					 OP_BT_PRIORITY_DETECTED);
 		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
 			ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 				"BT priority traffic detected\n");
 			priv->op_flags |= OP_BT_PRIORITY_DETECTED;
 		}

 		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;
 	bool is_btscan;
 	int ret;

 	ath_detect_bt_priority(priv);

 	is_btscan = !!(priv->op_flags & OP_BT_SCAN);

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

 	ath9k_hw_btcoex_bt_stomp(priv->ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
 			btcoex->bt_stomp_type);

 	timer_period = is_btscan ? 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);
 	bool is_btscan = priv->op_flags & OP_BT_SCAN;

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

 	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
 		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);
 }

 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
  */

 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), ATH_DBG_BTCOEX, "Starting btcoex work\n");

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


 /*
  * Cancel btcoex and bt duty cycle work.
  */
 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);
 }

 /*******/
 /* 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);
 }

 void ath9k_htc_radio_enable(struct ieee80211_hw *hw)
 {
 	struct ath9k_htc_priv *priv = hw->priv;
 	struct ath_hw *ah = priv->ah;
 	struct ath_common *common = ath9k_hw_common(ah);
 	int ret;
 	u8 cmd_rsp;

 	if (!ah->curchan)
 		ah->curchan = ath9k_cmn_get_curchannel(hw, ah);

 	/* Reset the HW */
 	ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 	if (ret) {
 		ath_err(common,
 			"Unable to reset hardware; reset status %d (freq %u MHz)\n",
 			ret, ah->curchan->channel);
 	}

 	ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit,
 			       &priv->curtxpow);

 	/* Start RX */
 	WMI_CMD(WMI_START_RECV_CMDID);
 	ath9k_host_rx_init(priv);

 	/* Start TX */
 	htc_start(priv->htc);
 	spin_lock_bh(&priv->tx.tx_lock);
 	priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP;
 	spin_unlock_bh(&priv->tx.tx_lock);
 	ieee80211_wake_queues(hw);

 	WMI_CMD(WMI_ENABLE_INTR_CMDID);

 	/* Enable LED */
 	ath9k_hw_cfg_output(ah, ah->led_pin,
 			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 	ath9k_hw_set_gpio(ah, ah->led_pin, 0);
 }

 void ath9k_htc_radio_disable(struct ieee80211_hw *hw)
 {
 	struct ath9k_htc_priv *priv = hw->priv;
 	struct ath_hw *ah = priv->ah;
 	struct ath_common *common = ath9k_hw_common(ah);
 	int ret;
 	u8 cmd_rsp;

 	ath9k_htc_ps_wakeup(priv);

 	/* Disable LED */
 	ath9k_hw_set_gpio(ah, ah->led_pin, 1);
 	ath9k_hw_cfg_gpio_input(ah, ah->led_pin);

 	WMI_CMD(WMI_DISABLE_INTR_CMDID);

 	/* Stop TX */
 	ieee80211_stop_queues(hw);
 	ath9k_htc_tx_drain(priv);
 	WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID);

 	/* Stop RX */
 	WMI_CMD(WMI_STOP_RECV_CMDID);

 	/* Clear the WMI event queue */
 	ath9k_wmi_event_drain(priv);

 	/*
 	 * The MIB counters have to be disabled here,
 	 * since the target doesn't do it.
 	 */
 	ath9k_hw_disable_mib_counters(ah);

 	if (!ah->curchan)
 		ah->curchan = ath9k_cmn_get_curchannel(hw, ah);

 	/* Reset the HW */
 	ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
 	if (ret) {
 		ath_err(common,
 			"Unable to reset hardware; reset status %d (freq %u MHz)\n",
 			ret, ah->curchan->channel);
 	}

 	/* Disable the PHY */
 	ath9k_hw_phy_disable(ah);

 	ath9k_htc_ps_restore(priv);
 	ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP);
 }
	/*
	* 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 */
	/******************/

	/*
	* 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))) {
	priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED \| OP_BT_SCAN);
	/* Detect if colocated bt started scanning */
	if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
	ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
	"BT scan detected\n");
	priv->op_flags \|= (OP_BT_SCAN \|
	OP_BT_PRIORITY_DETECTED);
	} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
	ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
	"BT priority traffic detected\n");
	priv->op_flags \|= OP_BT_PRIORITY_DETECTED;
	}

	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;
	bool is_btscan;
	int ret;

	ath_detect_bt_priority(priv);

	is_btscan = !!(priv->op_flags & OP_BT_SCAN);

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

	ath9k_hw_btcoex_bt_stomp(priv->ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
	btcoex->bt_stomp_type);

	timer_period = is_btscan ? 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);
	bool is_btscan = priv->op_flags & OP_BT_SCAN;

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

	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW \|\| is_btscan)
	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);
	}

	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
	*/

	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), ATH_DBG_BTCOEX, "Starting btcoex work\n");

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


	/*
	* Cancel btcoex and bt duty cycle work.
	*/
	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);
	}

	/*******/
	/* 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);
	}

	void ath9k_htc_radio_enable(struct ieee80211_hw *hw)
	{
	struct ath9k_htc_priv *priv = hw->priv;
	struct ath_hw *ah = priv->ah;
	struct ath_common *common = ath9k_hw_common(ah);
	int ret;
	u8 cmd_rsp;

	if (!ah->curchan)
	ah->curchan = ath9k_cmn_get_curchannel(hw, ah);

	/* Reset the HW */
	ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
	if (ret) {
	ath_err(common,
	"Unable to reset hardware; reset status %d (freq %u MHz)\n",
	ret, ah->curchan->channel);
	}

	ath9k_cmn_update_txpow(ah, priv->curtxpow, priv->txpowlimit,
	&priv->curtxpow);

	/* Start RX */
	WMI_CMD(WMI_START_RECV_CMDID);
	ath9k_host_rx_init(priv);

	/* Start TX */
	htc_start(priv->htc);
	spin_lock_bh(&priv->tx.tx_lock);
	priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP;
	spin_unlock_bh(&priv->tx.tx_lock);
	ieee80211_wake_queues(hw);

	WMI_CMD(WMI_ENABLE_INTR_CMDID);

	/* Enable LED */
	ath9k_hw_cfg_output(ah, ah->led_pin,
	AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
	ath9k_hw_set_gpio(ah, ah->led_pin, 0);
	}

	void ath9k_htc_radio_disable(struct ieee80211_hw *hw)
	{
	struct ath9k_htc_priv *priv = hw->priv;
	struct ath_hw *ah = priv->ah;
	struct ath_common *common = ath9k_hw_common(ah);
	int ret;
	u8 cmd_rsp;

	ath9k_htc_ps_wakeup(priv);

	/* Disable LED */
	ath9k_hw_set_gpio(ah, ah->led_pin, 1);
	ath9k_hw_cfg_gpio_input(ah, ah->led_pin);

	WMI_CMD(WMI_DISABLE_INTR_CMDID);

	/* Stop TX */
	ieee80211_stop_queues(hw);
	ath9k_htc_tx_drain(priv);
	WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID);

	/* Stop RX */
	WMI_CMD(WMI_STOP_RECV_CMDID);

	/* Clear the WMI event queue */
	ath9k_wmi_event_drain(priv);

	/*
	* The MIB counters have to be disabled here,
	* since the target doesn't do it.
	*/
	ath9k_hw_disable_mib_counters(ah);

	if (!ah->curchan)
	ah->curchan = ath9k_cmn_get_curchannel(hw, ah);

	/* Reset the HW */
	ret = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
	if (ret) {
	ath_err(common,
	"Unable to reset hardware; reset status %d (freq %u MHz)\n",
	ret, ah->curchan->channel);
	}

	/* Disable the PHY */
	ath9k_hw_phy_disable(ah);

	ath9k_htc_ps_restore(priv);
	ath9k_htc_setpower(priv, ATH9K_PM_FULL_SLEEP);
	}