[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / gpio.c

/*
 * Copyright (c) 2008-2009 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 "ath9k.h"

/********************************/
/*	 LED functions		*/
/********************************/

#ifdef CONFIG_MAC80211_LEDS
static void ath_led_brightness(struct led_classdev *led_cdev,
			       enum led_brightness brightness)
{
	struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
}

void ath_deinit_leds(struct ath_softc *sc)
{
	if (!sc->led_registered)
		return;

	ath_led_brightness(&sc->led_cdev, LED_OFF);
	led_classdev_unregister(&sc->led_cdev);
}

void ath_init_leds(struct ath_softc *sc)
{
	int ret;

	if (sc->sc_ah->led_pin < 0) {
		if (AR_SREV_9287(sc->sc_ah))
			sc->sc_ah->led_pin = ATH_LED_PIN_9287;
		else if (AR_SREV_9485(sc->sc_ah))
			sc->sc_ah->led_pin = ATH_LED_PIN_9485;
		else
			sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
	}

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

	if (!led_blink)
		sc->led_cdev.default_trigger =
			ieee80211_get_radio_led_name(sc->hw);

	snprintf(sc->led_name, sizeof(sc->led_name),
		"ath9k-%s", wiphy_name(sc->hw->wiphy));
	sc->led_cdev.name = sc->led_name;
	sc->led_cdev.brightness_set = ath_led_brightness;

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

	sc->led_registered = true;
}
#endif

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

static bool ath_is_rfkill_set(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;

	return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
				  ah->rfkill_polarity;
}

void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
{
	struct ath_softc *sc = hw->priv;
	bool blocked = !!ath_is_rfkill_set(sc);

	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
}

void ath_start_rfkill_poll(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;

	if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
		wiphy_rfkill_start_polling(sc->hw->wiphy);
}

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

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

	if (ath9k_hw_gpio_get(sc->sc_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))) {
		sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);
		/* Detect if colocated bt started scanning */
		if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
			ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
				"BT scan detected\n");
			sc->sc_flags |= (SC_OP_BT_SCAN |
					 SC_OP_BT_PRIORITY_DETECTED);
		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
			ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
				"BT priority traffic detected\n");
			sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
		}

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

static void ath9k_gen_timer_start(struct ath_hw *ah,
				  struct ath_gen_timer *timer,
				  u32 timer_next,
				  u32 timer_period)
{
	ath9k_hw_gen_timer_start(ah, timer, timer_next, timer_period);

	if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
		ath9k_hw_disable_interrupts(ah);
		ah->imask |= ATH9K_INT_GENTIMER;
		ath9k_hw_set_interrupts(ah, ah->imask);
	}
}

static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
{
	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;

	ath9k_hw_gen_timer_stop(ah, timer);

	/* if no timer is enabled, turn off interrupt mask */
	if (timer_table->timer_mask.val == 0) {
		ath9k_hw_disable_interrupts(ah);
		ah->imask &= ~ATH9K_INT_GENTIMER;
		ath9k_hw_set_interrupts(ah, ah->imask);
	}
}

/*
 * This is the master bt coex timer 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_timer(unsigned long data)
{
	struct ath_softc *sc = (struct ath_softc *) data;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_common *common = ath9k_hw_common(ah);
	u32 timer_period;
	bool is_btscan;

	ath_detect_bt_priority(sc);

	is_btscan = sc->sc_flags & SC_OP_BT_SCAN;

	spin_lock_bh(&btcoex->btcoex_lock);

	ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL :
			      btcoex->bt_stomp_type);

	spin_unlock_bh(&btcoex->btcoex_lock);

	if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
		if (btcoex->hw_timer_enabled)
			ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);

		timer_period = is_btscan ? btcoex->btscan_no_stomp :
					   btcoex->btcoex_no_stomp;
		ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, 0,
				      timer_period * 10);
		btcoex->hw_timer_enabled = true;
	}

	mod_timer(&btcoex->period_timer, jiffies +
				  msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
}

/*
 * Generic tsf based hw timer which configures weight
 * registers to time slice between wlan and bt traffic
 */
static void ath_btcoex_no_stomp_timer(void *arg)
{
	struct ath_softc *sc = (struct ath_softc *)arg;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_common *common = ath9k_hw_common(ah);
	bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;

	ath_dbg(common, ATH_DBG_BTCOEX,
		"no stomp timer running\n");

	spin_lock_bh(&btcoex->btcoex_lock);

	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
		ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE);
	 else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
		ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW);

	spin_unlock_bh(&btcoex->btcoex_lock);
}

int ath_init_btcoex_timer(struct ath_softc *sc)
{
	struct ath_btcoex *btcoex = &sc->btcoex;

	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
	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;

	setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
			(unsigned long) sc);

	spin_lock_init(&btcoex->btcoex_lock);

	btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
			ath_btcoex_no_stomp_timer,
			ath_btcoex_no_stomp_timer,
			(void *) sc, AR_FIRST_NDP_TIMER);

	if (!btcoex->no_stomp_timer)
		return -ENOMEM;

	return 0;
}

/*
 * (Re)start btcoex timers
 */
void ath9k_btcoex_timer_resume(struct ath_softc *sc)
{
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_hw *ah = sc->sc_ah;

	ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
		"Starting btcoex timers\n");

	/* make sure duty cycle timer is also stopped when resuming */
	if (btcoex->hw_timer_enabled)
		ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);

	btcoex->bt_priority_cnt = 0;
	btcoex->bt_priority_time = jiffies;
	sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED | SC_OP_BT_SCAN);

	mod_timer(&btcoex->period_timer, jiffies);
}


/*
 * Pause btcoex timer and bt duty cycle timer
 */
void ath9k_btcoex_timer_pause(struct ath_softc *sc)
{
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_hw *ah = sc->sc_ah;

	del_timer_sync(&btcoex->period_timer);

	if (btcoex->hw_timer_enabled)
		ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);

	btcoex->hw_timer_enabled = false;
}
Commit	Line	Data
0fca65c1 S	1	/*
	2	* Copyright (c) 2008-2009 Atheros Communications Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	#include "ath9k.h"
	18
	19	/********************************/
	20	/* LED functions */
	21	/********************************/
	22
0cf55c21	23	#ifdef CONFIG_MAC80211_LEDS
0fca65c1 S	24	static void ath_led_brightness(struct led_classdev *led_cdev,
	25	enum led_brightness brightness)
	26	{
0cf55c21 FF	27	struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
0cf55c21 FF	28	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
0fca65c1 S	29	}
	30
	31	void ath_deinit_leds(struct ath_softc *sc)
	32	{
0cf55c21 FF	33	if (!sc->led_registered)
	34	return;
	35
	36	ath_led_brightness(&sc->led_cdev, LED_OFF);
	37	led_classdev_unregister(&sc->led_cdev);
0fca65c1 S	38	}
	39
	40	void ath_init_leds(struct ath_softc *sc)
	41	{
0fca65c1 S	42	int ret;
0fca65c1 S	43
6de66dd9 FF	44	if (sc->sc_ah->led_pin < 0) {
	45	if (AR_SREV_9287(sc->sc_ah))
	46	sc->sc_ah->led_pin = ATH_LED_PIN_9287;
	47	else if (AR_SREV_9485(sc->sc_ah))
	48	sc->sc_ah->led_pin = ATH_LED_PIN_9485;
	49	else
	50	sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
	51	}
0fca65c1 S	52
	53	/* Configure gpio 1 for output */
	54	ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
	55	AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
	56	/* LED off, active low */
	57	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
	58
0cf55c21 FF	59	if (!led_blink)
	60	sc->led_cdev.default_trigger =
	61	ieee80211_get_radio_led_name(sc->hw);
	62
	63	snprintf(sc->led_name, sizeof(sc->led_name),
	64	"ath9k-%s", wiphy_name(sc->hw->wiphy));
	65	sc->led_cdev.name = sc->led_name;
	66	sc->led_cdev.brightness_set = ath_led_brightness;
	67
	68	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
	69	if (ret < 0)
	70	return;
	71
	72	sc->led_registered = true;
0fca65c1	73	}
0cf55c21	74	#endif
0fca65c1 S	75
	76	/*******************/
	77	/* Rfkill */
	78	/*******************/
	79
	80	static bool ath_is_rfkill_set(struct ath_softc *sc)
	81	{
	82	struct ath_hw *ah = sc->sc_ah;
	83
	84	return ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
	85	ah->rfkill_polarity;
	86	}
	87
	88	void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
	89	{
9ac58615	90	struct ath_softc *sc = hw->priv;
0fca65c1 S	91	bool blocked = !!ath_is_rfkill_set(sc);
	92
	93	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
	94	}
	95
	96	void ath_start_rfkill_poll(struct ath_softc *sc)
	97	{
	98	struct ath_hw *ah = sc->sc_ah;
	99
	100	if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
	101	wiphy_rfkill_start_polling(sc->hw->wiphy);
	102	}
	103
	104	/******************/
	105	/* BTCOEX */
	106	/******************/
	107
	108	/*
	109	* Detects if there is any priority bt traffic
	110	*/
	111	static void ath_detect_bt_priority(struct ath_softc *sc)
	112	{
	113	struct ath_btcoex *btcoex = &sc->btcoex;
	114	struct ath_hw *ah = sc->sc_ah;
	115
	116	if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
	117	btcoex->bt_priority_cnt++;
	118
	119	if (time_after(jiffies, btcoex->bt_priority_time +
	120	msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
58da1318 VT	121	sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED \| SC_OP_BT_SCAN);
	122	/* Detect if colocated bt started scanning */
	123	if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
226afe68 JP	124	ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
226afe68 JP	125	"BT scan detected\n");
58da1318 VT	126	sc->sc_flags \|= (SC_OP_BT_SCAN \|
	127	SC_OP_BT_PRIORITY_DETECTED);
	128	} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
226afe68 JP	129	ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_BTCOEX,
226afe68 JP	130	"BT priority traffic detected\n");
0fca65c1	131	sc->sc_flags \|= SC_OP_BT_PRIORITY_DETECTED;
0fca65c1 S	132	}
	133
	134	btcoex->bt_priority_cnt = 0;
	135	btcoex->bt_priority_time = jiffies;
	136	}
	137	}
	138
0fca65c1 S	139	static void ath9k_gen_timer_start(struct ath_hw *ah,
	140	struct ath_gen_timer *timer,
	141	u32 timer_next,
	142	u32 timer_period)
	143	{
0fca65c1 S	144	ath9k_hw_gen_timer_start(ah, timer, timer_next, timer_period);
0fca65c1 S	145
3069168c	146	if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
4df3071e	147	ath9k_hw_disable_interrupts(ah);
3069168c PR	148	ah->imask \|= ATH9K_INT_GENTIMER;
3069168c PR	149	ath9k_hw_set_interrupts(ah, ah->imask);
0fca65c1 S	150	}
	151	}
	152
	153	static void ath9k_gen_timer_stop(struct ath_hw ah, struct ath_gen_timer timer)
	154	{
0fca65c1 S	155	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
	156
	157	ath9k_hw_gen_timer_stop(ah, timer);
	158
	159	/* if no timer is enabled, turn off interrupt mask */
	160	if (timer_table->timer_mask.val == 0) {
4df3071e	161	ath9k_hw_disable_interrupts(ah);
3069168c PR	162	ah->imask &= ~ATH9K_INT_GENTIMER;
3069168c PR	163	ath9k_hw_set_interrupts(ah, ah->imask);
0fca65c1 S	164	}
	165	}
	166
	167	/*
	168	* This is the master bt coex timer which runs for every
	169	* 45ms, bt traffic will be given priority during 55% of this
	170	* period while wlan gets remaining 45%
	171	*/
	172	static void ath_btcoex_period_timer(unsigned long data)
	173	{
	174	struct ath_softc sc = (struct ath_softc ) data;
	175	struct ath_hw *ah = sc->sc_ah;
	176	struct ath_btcoex *btcoex = &sc->btcoex;
d99eeb87	177	struct ath_common *common = ath9k_hw_common(ah);
58da1318 VT	178	u32 timer_period;
58da1318 VT	179	bool is_btscan;
0fca65c1 S	180
	181	ath_detect_bt_priority(sc);
	182
58da1318 VT	183	is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
58da1318 VT	184
0fca65c1 S	185	spin_lock_bh(&btcoex->btcoex_lock);
0fca65c1 S	186
d99eeb87	187	ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL :
58da1318	188	btcoex->bt_stomp_type);
0fca65c1 S	189
	190	spin_unlock_bh(&btcoex->btcoex_lock);
	191
	192	if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
	193	if (btcoex->hw_timer_enabled)
	194	ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
	195
58da1318 VT	196	timer_period = is_btscan ? btcoex->btscan_no_stomp :
58da1318 VT	197	btcoex->btcoex_no_stomp;
8eb1dabb FF	198	ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, 0,
8eb1dabb FF	199	timer_period * 10);
0fca65c1 S	200	btcoex->hw_timer_enabled = true;
	201	}
	202
	203	mod_timer(&btcoex->period_timer, jiffies +
	204	msecs_to_jiffies(ATH_BTCOEX_DEF_BT_PERIOD));
	205	}
	206
	207	/*
	208	* Generic tsf based hw timer which configures weight
	209	* registers to time slice between wlan and bt traffic
	210	*/
	211	static void ath_btcoex_no_stomp_timer(void *arg)
	212	{
	213	struct ath_softc sc = (struct ath_softc )arg;
	214	struct ath_hw *ah = sc->sc_ah;
	215	struct ath_btcoex *btcoex = &sc->btcoex;
d99eeb87	216	struct ath_common *common = ath9k_hw_common(ah);
58da1318	217	bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
0fca65c1	218
226afe68 JP	219	ath_dbg(common, ATH_DBG_BTCOEX,
226afe68 JP	220	"no stomp timer running\n");
0fca65c1 S	221
	222	spin_lock_bh(&btcoex->btcoex_lock);
	223
58da1318	224	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW \|\| is_btscan)
d99eeb87	225	ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE);
0fca65c1	226	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
d99eeb87	227	ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW);
0fca65c1 S	228
	229	spin_unlock_bh(&btcoex->btcoex_lock);
	230	}
	231
	232	int ath_init_btcoex_timer(struct ath_softc *sc)
	233	{
	234	struct ath_btcoex *btcoex = &sc->btcoex;
	235
	236	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
	237	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
	238	btcoex->btcoex_period / 100;
58da1318 VT	239	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
58da1318 VT	240	btcoex->btcoex_period / 100;
0fca65c1 S	241
	242	setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
	243	(unsigned long) sc);
	244
	245	spin_lock_init(&btcoex->btcoex_lock);
	246
	247	btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
	248	ath_btcoex_no_stomp_timer,
	249	ath_btcoex_no_stomp_timer,
	250	(void *) sc, AR_FIRST_NDP_TIMER);
	251
	252	if (!btcoex->no_stomp_timer)
	253	return -ENOMEM;
	254
	255	return 0;
	256	}
	257
	258	/*
	259	* (Re)start btcoex timers
	260	*/
	261	void ath9k_btcoex_timer_resume(struct ath_softc *sc)
	262	{
	263	struct ath_btcoex *btcoex = &sc->btcoex;
	264	struct ath_hw *ah = sc->sc_ah;
	265
226afe68 JP	266	ath_dbg(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
226afe68 JP	267	"Starting btcoex timers\n");
0fca65c1 S	268
	269	/* make sure duty cycle timer is also stopped when resuming */
	270	if (btcoex->hw_timer_enabled)
	271	ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
	272
	273	btcoex->bt_priority_cnt = 0;
	274	btcoex->bt_priority_time = jiffies;
58da1318	275	sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED \| SC_OP_BT_SCAN);
0fca65c1 S	276
	277	mod_timer(&btcoex->period_timer, jiffies);
	278	}
	279
	280
	281	/*
	282	* Pause btcoex timer and bt duty cycle timer
	283	*/
	284	void ath9k_btcoex_timer_pause(struct ath_softc *sc)
	285	{
	286	struct ath_btcoex *btcoex = &sc->btcoex;
	287	struct ath_hw *ah = sc->sc_ah;
	288
	289	del_timer_sync(&btcoex->period_timer);
	290
	291	if (btcoex->hw_timer_enabled)
	292	ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
	293
	294	btcoex->hw_timer_enabled = false;
	295	}