drivers/net/wireless/ath/ath9k/btcoex.c - kernel/msm - Gitiles

 /*
  * Copyright (c) 2009-2011 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 "hw.h"

 enum ath_bt_mode {
 	ATH_BT_COEX_MODE_LEGACY,        /* legacy rx_clear mode */
 	ATH_BT_COEX_MODE_UNSLOTTED,     /* untimed/unslotted mode */
 	ATH_BT_COEX_MODE_SLOTTED,       /* slotted mode */
 	ATH_BT_COEX_MODE_DISALBED,      /* coexistence disabled */
 };

 struct ath_btcoex_config {
 	u8 bt_time_extend;
 	bool bt_txstate_extend;
 	bool bt_txframe_extend;
 	enum ath_bt_mode bt_mode; /* coexistence mode */
 	bool bt_quiet_collision;
 	bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
 	u8 bt_priority_time;
 	u8 bt_first_slot_time;
 	bool bt_hold_rx_clear;
 };


 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 	const struct ath_btcoex_config ath_bt_config = {
 		.bt_time_extend = 0,
 		.bt_txstate_extend = true,
 		.bt_txframe_extend = true,
 		.bt_mode = ATH_BT_COEX_MODE_SLOTTED,
 		.bt_quiet_collision = true,
 		.bt_rxclear_polarity = true,
 		.bt_priority_time = 2,
 		.bt_first_slot_time = 5,
 		.bt_hold_rx_clear = true,
 	};
 	u32 i;
 	bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;

 	if (AR_SREV_9300_20_OR_LATER(ah))
 		rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;

 	btcoex_hw->bt_coex_mode =
 		(btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
 		SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
 		SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
 		SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
 		SM(ath_bt_config.bt_mode, AR_BT_MODE) |
 		SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
 		SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
 		SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
 		SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
 		SM(qnum, AR_BT_QCU_THRESH);

 	btcoex_hw->bt_coex_mode2 =
 		SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
 		SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
 		AR_BT_DISABLE_BT_ANT;

 	for (i = 0; i < 32; i++)
 		ah->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
 }
 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);

 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

 	/* connect bt_active to baseband */
 	REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 		    (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
 		     AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));

 	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 		    AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);

 	/* Set input mux for bt_active to gpio pin */
 	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 		      AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 		      btcoex_hw->btactive_gpio);

 	/* Configure the desired gpio port for input */
 	ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 }
 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);

 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

 	/* btcoex 3-wire */
 	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 			(AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
 			 AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));

 	/* Set input mux for bt_prority_async and
 	 *                  bt_active_async to GPIO pins */
 	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 			AR_GPIO_INPUT_MUX1_BT_ACTIVE,
 			btcoex_hw->btactive_gpio);

 	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 			AR_GPIO_INPUT_MUX1_BT_PRIORITY,
 			btcoex_hw->btpriority_gpio);

 	/* Configure the desired GPIO ports for input */

 	ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
 	ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
 }
 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);

 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

 	/* Configure the desired GPIO port for TX_FRAME output */
 	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 			    AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 }

 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
 				u32 bt_weight,
 				u32 wlan_weight)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

 	btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
 				     SM(wlan_weight, AR_BTCOEX_WL_WGHT);
 }
 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);


 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 	u32  val;

 	/*
 	 * Program coex mode and weight registers to
 	 * enable coex 3-wire
 	 */
 	REG_WRITE(ah, AR_BT_COEX_MODE, btcoex_hw->bt_coex_mode);
 	REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_hw->bt_coex_mode2);


 	if (AR_SREV_9300_20_OR_LATER(ah)) {
 		REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, ah->bt_coex_wlan_weight[0]);
 		REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, ah->bt_coex_wlan_weight[1]);
 		REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, ah->bt_coex_bt_weight[0]);
 		REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, ah->bt_coex_bt_weight[1]);
 		REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, ah->bt_coex_bt_weight[2]);
 		REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, ah->bt_coex_bt_weight[3]);

 	} else
 		REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex_hw->bt_coex_weights);


 	if (AR_SREV_9271(ah)) {
 		val = REG_READ(ah, 0x50040);
 		val &= 0xFFFFFEFF;
 		REG_WRITE(ah, 0x50040, val);
 	}

 	REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
 	REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);

 	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 			    AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 }

 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

 	switch (btcoex_hw->scheme) {
 	case ATH_BTCOEX_CFG_NONE:
 		break;
 	case ATH_BTCOEX_CFG_2WIRE:
 		ath9k_hw_btcoex_enable_2wire(ah);
 		break;
 	case ATH_BTCOEX_CFG_3WIRE:
 		ath9k_hw_btcoex_enable_3wire(ah);
 		break;
 	}

 	REG_RMW(ah, AR_GPIO_PDPU,
 		(0x2 << (btcoex_hw->btactive_gpio * 2)),
 		(0x3 << (btcoex_hw->btactive_gpio * 2)));

 	ah->btcoex_hw.enabled = true;
 }
 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);

 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 {
 	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

 	ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);

 	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
 			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);

 	if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
 		REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
 		REG_WRITE(ah, AR_BT_COEX_MODE2, 0);

 		if (AR_SREV_9300_20_OR_LATER(ah)) {
 			REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
 			REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
 			REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, 0);
 			REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, 0);
 			REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, 0);
 			REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, 0);
 		} else
 			REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);

 	}

 	ah->btcoex_hw.enabled = false;
 }
 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);

 static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
 			 enum ath_stomp_type stomp_type)
 {
 	ah->bt_coex_bt_weight[0] = AR9300_BT_WGHT;
 	ah->bt_coex_bt_weight[1] = AR9300_BT_WGHT;
 	ah->bt_coex_bt_weight[2] = AR9300_BT_WGHT;
 	ah->bt_coex_bt_weight[3] = AR9300_BT_WGHT;


 	switch (stomp_type) {
 	case ATH_BTCOEX_STOMP_ALL:
 		ah->bt_coex_wlan_weight[0] = AR9300_STOMP_ALL_WLAN_WGHT0;
 		ah->bt_coex_wlan_weight[1] = AR9300_STOMP_ALL_WLAN_WGHT1;
 		break;
 	case ATH_BTCOEX_STOMP_LOW:
 		ah->bt_coex_wlan_weight[0] = AR9300_STOMP_LOW_WLAN_WGHT0;
 		ah->bt_coex_wlan_weight[1] = AR9300_STOMP_LOW_WLAN_WGHT1;
 		break;
 	case ATH_BTCOEX_STOMP_NONE:
 		ah->bt_coex_wlan_weight[0] = AR9300_STOMP_NONE_WLAN_WGHT0;
 		ah->bt_coex_wlan_weight[1] = AR9300_STOMP_NONE_WLAN_WGHT1;
 		break;

 	default:
 		ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 				"Invalid Stomptype\n");
 		break;
 	}

 	ath9k_hw_btcoex_enable(ah);
 }

 /*
  * Configures appropriate weight based on stomp type.
  */
 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
 			      enum ath_stomp_type stomp_type)
 {
 	if (AR_SREV_9300_20_OR_LATER(ah)) {
 		ar9003_btcoex_bt_stomp(ah, stomp_type);
 		return;
 	}

 	switch (stomp_type) {
 	case ATH_BTCOEX_STOMP_ALL:
 		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 				AR_STOMP_ALL_WLAN_WGHT);
 		break;
 	case ATH_BTCOEX_STOMP_LOW:
 		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 				AR_STOMP_LOW_WLAN_WGHT);
 		break;
 	case ATH_BTCOEX_STOMP_NONE:
 		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
 				AR_STOMP_NONE_WLAN_WGHT);
 		break;
 	default:
 		ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
 				"Invalid Stomptype\n");
 		break;
 	}

 	ath9k_hw_btcoex_enable(ah);
 }
 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
	/*
	* Copyright (c) 2009-2011 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 "hw.h"

	enum ath_bt_mode {
	ATH_BT_COEX_MODE_LEGACY, /* legacy rx_clear mode */
	ATH_BT_COEX_MODE_UNSLOTTED, /* untimed/unslotted mode */
	ATH_BT_COEX_MODE_SLOTTED, /* slotted mode */
	ATH_BT_COEX_MODE_DISALBED, /* coexistence disabled */
	};

	struct ath_btcoex_config {
	u8 bt_time_extend;
	bool bt_txstate_extend;
	bool bt_txframe_extend;
	enum ath_bt_mode bt_mode; /* coexistence mode */
	bool bt_quiet_collision;
	bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
	u8 bt_priority_time;
	u8 bt_first_slot_time;
	bool bt_hold_rx_clear;
	};


	void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
	const struct ath_btcoex_config ath_bt_config = {
	.bt_time_extend = 0,
	.bt_txstate_extend = true,
	.bt_txframe_extend = true,
	.bt_mode = ATH_BT_COEX_MODE_SLOTTED,
	.bt_quiet_collision = true,
	.bt_rxclear_polarity = true,
	.bt_priority_time = 2,
	.bt_first_slot_time = 5,
	.bt_hold_rx_clear = true,
	};
	u32 i;
	bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;

	if (AR_SREV_9300_20_OR_LATER(ah))
	rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;

	btcoex_hw->bt_coex_mode =
	(btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) \|
	SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) \|
	SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) \|
	SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) \|
	SM(ath_bt_config.bt_mode, AR_BT_MODE) \|
	SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) \|
	SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) \|
	SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) \|
	SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) \|
	SM(qnum, AR_BT_QCU_THRESH);

	btcoex_hw->bt_coex_mode2 =
	SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) \|
	SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) \|
	AR_BT_DISABLE_BT_ANT;

	for (i = 0; i < 32; i++)
	ah->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
	}
	EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);

	void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

	/* connect bt_active to baseband */
	REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
	(AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF \|
	AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));

	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
	AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);

	/* Set input mux for bt_active to gpio pin */
	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
	AR_GPIO_INPUT_MUX1_BT_ACTIVE,
	btcoex_hw->btactive_gpio);

	/* Configure the desired gpio port for input */
	ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
	}
	EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);

	void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

	/* btcoex 3-wire */
	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
	(AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB \|
	AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));

	/* Set input mux for bt_prority_async and
	* bt_active_async to GPIO pins */
	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
	AR_GPIO_INPUT_MUX1_BT_ACTIVE,
	btcoex_hw->btactive_gpio);

	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
	AR_GPIO_INPUT_MUX1_BT_PRIORITY,
	btcoex_hw->btpriority_gpio);

	/* Configure the desired GPIO ports for input */

	ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
	ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
	}
	EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);

	static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

	/* Configure the desired GPIO port for TX_FRAME output */
	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
	AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
	}

	void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
	u32 bt_weight,
	u32 wlan_weight)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

	btcoex_hw->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) \|
	SM(wlan_weight, AR_BTCOEX_WL_WGHT);
	}
	EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);


	static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
	u32 val;

	/*
	* Program coex mode and weight registers to
	* enable coex 3-wire
	*/
	REG_WRITE(ah, AR_BT_COEX_MODE, btcoex_hw->bt_coex_mode);
	REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_hw->bt_coex_mode2);


	if (AR_SREV_9300_20_OR_LATER(ah)) {
	REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, ah->bt_coex_wlan_weight[0]);
	REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, ah->bt_coex_wlan_weight[1]);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, ah->bt_coex_bt_weight[0]);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, ah->bt_coex_bt_weight[1]);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, ah->bt_coex_bt_weight[2]);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, ah->bt_coex_bt_weight[3]);

	} else
	REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex_hw->bt_coex_weights);



	if (AR_SREV_9271(ah)) {
	val = REG_READ(ah, 0x50040);
	val &= 0xFFFFFEFF;
	REG_WRITE(ah, 0x50040, val);
	}

	REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
	REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);

	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
	AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
	}

	void ath9k_hw_btcoex_enable(struct ath_hw *ah)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

	switch (btcoex_hw->scheme) {
	case ATH_BTCOEX_CFG_NONE:
	break;
	case ATH_BTCOEX_CFG_2WIRE:
	ath9k_hw_btcoex_enable_2wire(ah);
	break;
	case ATH_BTCOEX_CFG_3WIRE:
	ath9k_hw_btcoex_enable_3wire(ah);
	break;
	}

	REG_RMW(ah, AR_GPIO_PDPU,
	(0x2 << (btcoex_hw->btactive_gpio * 2)),
	(0x3 << (btcoex_hw->btactive_gpio * 2)));

	ah->btcoex_hw.enabled = true;
	}
	EXPORT_SYMBOL(ath9k_hw_btcoex_enable);

	void ath9k_hw_btcoex_disable(struct ath_hw *ah)
	{
	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;

	ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);

	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
	AR_GPIO_OUTPUT_MUX_AS_OUTPUT);

	if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
	REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET \| AR_BT_MODE);
	REG_WRITE(ah, AR_BT_COEX_MODE2, 0);

	if (AR_SREV_9300_20_OR_LATER(ah)) {
	REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
	REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS0, 0);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS1, 0);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS2, 0);
	REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS3, 0);
	} else
	REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);

	}

	ah->btcoex_hw.enabled = false;
	}
	EXPORT_SYMBOL(ath9k_hw_btcoex_disable);

	static void ar9003_btcoex_bt_stomp(struct ath_hw *ah,
	enum ath_stomp_type stomp_type)
	{
	ah->bt_coex_bt_weight[0] = AR9300_BT_WGHT;
	ah->bt_coex_bt_weight[1] = AR9300_BT_WGHT;
	ah->bt_coex_bt_weight[2] = AR9300_BT_WGHT;
	ah->bt_coex_bt_weight[3] = AR9300_BT_WGHT;


	switch (stomp_type) {
	case ATH_BTCOEX_STOMP_ALL:
	ah->bt_coex_wlan_weight[0] = AR9300_STOMP_ALL_WLAN_WGHT0;
	ah->bt_coex_wlan_weight[1] = AR9300_STOMP_ALL_WLAN_WGHT1;
	break;
	case ATH_BTCOEX_STOMP_LOW:
	ah->bt_coex_wlan_weight[0] = AR9300_STOMP_LOW_WLAN_WGHT0;
	ah->bt_coex_wlan_weight[1] = AR9300_STOMP_LOW_WLAN_WGHT1;
	break;
	case ATH_BTCOEX_STOMP_NONE:
	ah->bt_coex_wlan_weight[0] = AR9300_STOMP_NONE_WLAN_WGHT0;
	ah->bt_coex_wlan_weight[1] = AR9300_STOMP_NONE_WLAN_WGHT1;
	break;

	default:
	ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
	"Invalid Stomptype\n");
	break;
	}

	ath9k_hw_btcoex_enable(ah);
	}

	/*
	* Configures appropriate weight based on stomp type.
	*/
	void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
	enum ath_stomp_type stomp_type)
	{
	if (AR_SREV_9300_20_OR_LATER(ah)) {
	ar9003_btcoex_bt_stomp(ah, stomp_type);
	return;
	}

	switch (stomp_type) {
	case ATH_BTCOEX_STOMP_ALL:
	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	AR_STOMP_ALL_WLAN_WGHT);
	break;
	case ATH_BTCOEX_STOMP_LOW:
	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	AR_STOMP_LOW_WLAN_WGHT);
	break;
	case ATH_BTCOEX_STOMP_NONE:
	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	AR_STOMP_NONE_WLAN_WGHT);
	break;
	default:
	ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
	"Invalid Stomptype\n");
	break;
	}

	ath9k_hw_btcoex_enable(ah);
	}
	EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);