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

/*
 * Copyright (c) 2008-2011 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 "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 if (AR_SREV_9300(sc->sc_ah))
			sc->sc_ah->led_pin = ATH_LED_PIN_9300;
		else if (AR_SREV_9462(sc->sc_ah))
			sc->sc_ah->led_pin = ATH_LED_PIN_9462;
		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;
	bool is_blocked;

	ath9k_ps_wakeup(sc);
	is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
				  ah->rfkill_polarity;
	ath9k_ps_restore(sc);

	return is_blocked;
}

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);
}

#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT

/******************/
/*     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), 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), 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 trig_timeout,
				  u32 timer_period)
{
	ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);

	if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
		ath9k_hw_disable_interrupts(ah);
		ah->imask |= ATH9K_INT_GENTIMER;
		ath9k_hw_set_interrupts(ah);
		ath9k_hw_enable_interrupts(ah);
	}
}

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);
		ath9k_hw_enable_interrupts(ah);
	}
}

/*
 * 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;
	u32 timer_period;
	bool is_btscan;

	ath9k_ps_wakeup(sc);
	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
		ath_detect_bt_priority(sc);
	is_btscan = sc->sc_flags & SC_OP_BT_SCAN;

	spin_lock_bh(&btcoex->btcoex_lock);

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

	ath9k_hw_btcoex_enable(ah);
	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, timer_period,
				      timer_period * 10);
		btcoex->hw_timer_enabled = true;
	}

	ath9k_ps_restore(sc);
	timer_period = btcoex->btcoex_period / 1000;
	mod_timer(&btcoex->period_timer, jiffies +
				  msecs_to_jiffies(timer_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, BTCOEX, "no stomp timer running\n");

	ath9k_ps_wakeup(sc);
	spin_lock_bh(&btcoex->btcoex_lock);

	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);

	ath9k_hw_btcoex_enable(ah);
	spin_unlock_bh(&btcoex->btcoex_lock);
	ath9k_ps_restore(sc);
}

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

	if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_NONE)
		return 0;

	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), BTCOEX, "Starting btcoex timers\n");

	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)
		return;

	/* 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;

	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)
		return;

	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;
}

u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
{
	struct ath_mci_profile *mci = &sc->btcoex.mci;
	u16 aggr_limit = 0;

	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
		aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
	else if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED)
		aggr_limit = min((max_4ms_framelen * 3) / 8,
				 (u32)ATH_AMPDU_LIMIT_MAX);

	return aggr_limit;
}

void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
{
	struct ath_hw *ah = sc->sc_ah;

	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
		if (status & ATH9K_INT_GENTIMER)
			ath_gen_timer_isr(sc->sc_ah);

	if ((status & ATH9K_INT_MCI) && ATH9K_HW_CAP_MCI)
		ath_mci_intr(sc);
}

void ath9k_start_btcoex(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;

	if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
	    !ah->btcoex_hw.enabled) {
		if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
			ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
						   AR_STOMP_LOW_WLAN_WGHT);
		ath9k_hw_btcoex_enable(ah);

		if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
			ath9k_btcoex_timer_resume(sc);
	}
}

void ath9k_stop_btcoex(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;

	if (ah->btcoex_hw.enabled &&
	    ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
		ath9k_hw_btcoex_disable(ah);
		if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
			ath9k_btcoex_timer_pause(sc);
		ath_mci_flush_profile(&sc->btcoex.mci);
	}
}

void ath9k_deinit_btcoex(struct ath_softc *sc)
{
        if ((sc->btcoex.no_stomp_timer) &&
	    ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE)
		ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);

	if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_MCI)
		ath_mci_cleanup(sc);
}

int ath9k_init_btcoex(struct ath_softc *sc)
{
	struct ath_txq *txq;
	struct ath_hw *ah = sc->sc_ah;
	int r;

	switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
	case ATH_BTCOEX_CFG_NONE:
		break;
	case ATH_BTCOEX_CFG_2WIRE:
		ath9k_hw_btcoex_init_2wire(sc->sc_ah);
		break;
	case ATH_BTCOEX_CFG_3WIRE:
		ath9k_hw_btcoex_init_3wire(sc->sc_ah);
		r = ath_init_btcoex_timer(sc);
		if (r)
			return -1;
		txq = sc->tx.txq_map[WME_AC_BE];
		ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
		sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
		break;
	case ATH_BTCOEX_CFG_MCI:
		sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
		sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
		INIT_LIST_HEAD(&sc->btcoex.mci.info);

		r = ath_mci_setup(sc);
		if (r)
			return r;

		ath9k_hw_btcoex_init_mci(ah);

		break;
	default:
		WARN_ON(1);
		break;
	}

	return 0;
}

#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */
Commit	Line	Data
0fca65c1	1	/*
5b68138e	2	* Copyright (c) 2008-2011 Atheros Communications Inc.
0fca65c1 S	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;
353e5019 SB	49	else if (AR_SREV_9300(sc->sc_ah))
353e5019 SB	50	sc->sc_ah->led_pin = ATH_LED_PIN_9300;
423e38e8 RM	51	else if (AR_SREV_9462(sc->sc_ah))
423e38e8 RM	52	sc->sc_ah->led_pin = ATH_LED_PIN_9462;
6de66dd9 FF	53	else
	54	sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
	55	}
0fca65c1 S	56
	57	/* Configure gpio 1 for output */
	58	ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
	59	AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
	60	/* LED off, active low */
	61	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
	62
0cf55c21 FF	63	if (!led_blink)
	64	sc->led_cdev.default_trigger =
	65	ieee80211_get_radio_led_name(sc->hw);
	66
	67	snprintf(sc->led_name, sizeof(sc->led_name),
	68	"ath9k-%s", wiphy_name(sc->hw->wiphy));
	69	sc->led_cdev.name = sc->led_name;
	70	sc->led_cdev.brightness_set = ath_led_brightness;
	71
	72	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
	73	if (ret < 0)
	74	return;
	75
	76	sc->led_registered = true;
0fca65c1	77	}
0cf55c21	78	#endif
0fca65c1 S	79
	80	/*******************/
	81	/* Rfkill */
	82	/*******************/
	83
	84	static bool ath_is_rfkill_set(struct ath_softc *sc)
	85	{
	86	struct ath_hw *ah = sc->sc_ah;
90826313	87	bool is_blocked;
0fca65c1	88
90826313 MSS	89	ath9k_ps_wakeup(sc);
90826313 MSS	90	is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
0fca65c1	91	ah->rfkill_polarity;
90826313 MSS	92	ath9k_ps_restore(sc);
	93
	94	return is_blocked;
0fca65c1 S	95	}
	96
	97	void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
	98	{
9ac58615	99	struct ath_softc *sc = hw->priv;
0fca65c1 S	100	bool blocked = !!ath_is_rfkill_set(sc);
	101
	102	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
	103	}
	104
	105	void ath_start_rfkill_poll(struct ath_softc *sc)
	106	{
	107	struct ath_hw *ah = sc->sc_ah;
	108
	109	if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
	110	wiphy_rfkill_start_polling(sc->hw->wiphy);
	111	}
	112
4daa7760 SM	113	#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
4daa7760 SM	114
0fca65c1 S	115	/******************/
	116	/* BTCOEX */
	117	/******************/
	118
	119	/*
	120	* Detects if there is any priority bt traffic
	121	*/
	122	static void ath_detect_bt_priority(struct ath_softc *sc)
	123	{
	124	struct ath_btcoex *btcoex = &sc->btcoex;
	125	struct ath_hw *ah = sc->sc_ah;
	126
	127	if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
	128	btcoex->bt_priority_cnt++;
	129
	130	if (time_after(jiffies, btcoex->bt_priority_time +
	131	msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
58da1318 VT	132	sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED \| SC_OP_BT_SCAN);
	133	/* Detect if colocated bt started scanning */
	134	if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
d2182b69	135	ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
226afe68	136	"BT scan detected\n");
58da1318 VT	137	sc->sc_flags \|= (SC_OP_BT_SCAN \|
	138	SC_OP_BT_PRIORITY_DETECTED);
	139	} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
d2182b69	140	ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
226afe68	141	"BT priority traffic detected\n");
0fca65c1	142	sc->sc_flags \|= SC_OP_BT_PRIORITY_DETECTED;
0fca65c1 S	143	}
	144
	145	btcoex->bt_priority_cnt = 0;
	146	btcoex->bt_priority_time = jiffies;
	147	}
	148	}
	149
0fca65c1 S	150	static void ath9k_gen_timer_start(struct ath_hw *ah,
0fca65c1 S	151	struct ath_gen_timer *timer,
788f6875	152	u32 trig_timeout,
0fca65c1 S	153	u32 timer_period)
0fca65c1 S	154	{
788f6875	155	ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);
0fca65c1	156
3069168c	157	if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
4df3071e	158	ath9k_hw_disable_interrupts(ah);
3069168c	159	ah->imask \|= ATH9K_INT_GENTIMER;
72d874c6	160	ath9k_hw_set_interrupts(ah);
b037b693	161	ath9k_hw_enable_interrupts(ah);
0fca65c1 S	162	}
	163	}
	164
	165	static void ath9k_gen_timer_stop(struct ath_hw ah, struct ath_gen_timer timer)
	166	{
0fca65c1 S	167	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
	168
	169	ath9k_hw_gen_timer_stop(ah, timer);
	170
	171	/* if no timer is enabled, turn off interrupt mask */
	172	if (timer_table->timer_mask.val == 0) {
4df3071e	173	ath9k_hw_disable_interrupts(ah);
3069168c	174	ah->imask &= ~ATH9K_INT_GENTIMER;
72d874c6	175	ath9k_hw_set_interrupts(ah);
b037b693	176	ath9k_hw_enable_interrupts(ah);
0fca65c1 S	177	}
	178	}
	179
	180	/*
	181	* This is the master bt coex timer which runs for every
	182	* 45ms, bt traffic will be given priority during 55% of this
	183	* period while wlan gets remaining 45%
	184	*/
	185	static void ath_btcoex_period_timer(unsigned long data)
	186	{
	187	struct ath_softc sc = (struct ath_softc ) data;
	188	struct ath_hw *ah = sc->sc_ah;
	189	struct ath_btcoex *btcoex = &sc->btcoex;
58da1318 VT	190	u32 timer_period;
58da1318 VT	191	bool is_btscan;
0fca65c1	192
a039a993	193	ath9k_ps_wakeup(sc);
7dc181c2 RM	194	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
7dc181c2 RM	195	ath_detect_bt_priority(sc);
58da1318 VT	196	is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
58da1318 VT	197
0fca65c1 S	198	spin_lock_bh(&btcoex->btcoex_lock);
0fca65c1 S	199
978f78bf	200	ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
58da1318	201	btcoex->bt_stomp_type);
0fca65c1	202
bc6d5c29	203	ath9k_hw_btcoex_enable(ah);
0fca65c1 S	204	spin_unlock_bh(&btcoex->btcoex_lock);
	205
	206	if (btcoex->btcoex_period != btcoex->btcoex_no_stomp) {
	207	if (btcoex->hw_timer_enabled)
	208	ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
	209
58da1318 VT	210	timer_period = is_btscan ? btcoex->btscan_no_stomp :
58da1318 VT	211	btcoex->btcoex_no_stomp;
788f6875	212	ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period,
8eb1dabb	213	timer_period * 10);
0fca65c1 S	214	btcoex->hw_timer_enabled = true;
	215	}
	216
a039a993	217	ath9k_ps_restore(sc);
7dc181c2	218	timer_period = btcoex->btcoex_period / 1000;
0fca65c1	219	mod_timer(&btcoex->period_timer, jiffies +
7dc181c2	220	msecs_to_jiffies(timer_period));
0fca65c1 S	221	}
	222
	223	/*
	224	* Generic tsf based hw timer which configures weight
	225	* registers to time slice between wlan and bt traffic
	226	*/
	227	static void ath_btcoex_no_stomp_timer(void *arg)
	228	{
	229	struct ath_softc sc = (struct ath_softc )arg;
	230	struct ath_hw *ah = sc->sc_ah;
	231	struct ath_btcoex *btcoex = &sc->btcoex;
d99eeb87	232	struct ath_common *common = ath9k_hw_common(ah);
58da1318	233	bool is_btscan = sc->sc_flags & SC_OP_BT_SCAN;
0fca65c1	234
d2182b69	235	ath_dbg(common, BTCOEX, "no stomp timer running\n");
0fca65c1	236
a039a993	237	ath9k_ps_wakeup(sc);
0fca65c1 S	238	spin_lock_bh(&btcoex->btcoex_lock);
0fca65c1 S	239
58da1318	240	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW \|\| is_btscan)
978f78bf	241	ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
0fca65c1	242	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
978f78bf	243	ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
0fca65c1	244
bc6d5c29	245	ath9k_hw_btcoex_enable(ah);
0fca65c1	246	spin_unlock_bh(&btcoex->btcoex_lock);
a039a993	247	ath9k_ps_restore(sc);
0fca65c1 S	248	}
0fca65c1 S	249
df198b17	250	static int ath_init_btcoex_timer(struct ath_softc *sc)
0fca65c1 S	251	{
	252	struct ath_btcoex *btcoex = &sc->btcoex;
	253
8a309305 FF	254	if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_NONE)
	255	return 0;
	256
0fca65c1 S	257	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
	258	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
	259	btcoex->btcoex_period / 100;
58da1318 VT	260	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
58da1318 VT	261	btcoex->btcoex_period / 100;
0fca65c1 S	262
	263	setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
	264	(unsigned long) sc);
	265
	266	spin_lock_init(&btcoex->btcoex_lock);
	267
	268	btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
	269	ath_btcoex_no_stomp_timer,
	270	ath_btcoex_no_stomp_timer,
	271	(void *) sc, AR_FIRST_NDP_TIMER);
	272
	273	if (!btcoex->no_stomp_timer)
	274	return -ENOMEM;
	275
	276	return 0;
	277	}
	278
	279	/*
	280	* (Re)start btcoex timers
	281	*/
	282	void ath9k_btcoex_timer_resume(struct ath_softc *sc)
	283	{
	284	struct ath_btcoex *btcoex = &sc->btcoex;
	285	struct ath_hw *ah = sc->sc_ah;
	286
d2182b69	287	ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");
0fca65c1	288
8a309305 FF	289	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)
	290	return;
	291
0fca65c1 S	292	/* make sure duty cycle timer is also stopped when resuming */
	293	if (btcoex->hw_timer_enabled)
	294	ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
	295
	296	btcoex->bt_priority_cnt = 0;
	297	btcoex->bt_priority_time = jiffies;
58da1318	298	sc->sc_flags &= ~(SC_OP_BT_PRIORITY_DETECTED \| SC_OP_BT_SCAN);
0fca65c1 S	299
	300	mod_timer(&btcoex->period_timer, jiffies);
	301	}
	302
	303
	304	/*
	305	* Pause btcoex timer and bt duty cycle timer
	306	*/
	307	void ath9k_btcoex_timer_pause(struct ath_softc *sc)
	308	{
	309	struct ath_btcoex *btcoex = &sc->btcoex;
	310	struct ath_hw *ah = sc->sc_ah;
	311
8a309305 FF	312	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_NONE)
	313	return;
	314
0fca65c1 S	315	del_timer_sync(&btcoex->period_timer);
	316
	317	if (btcoex->hw_timer_enabled)
	318	ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
	319
	320	btcoex->hw_timer_enabled = false;
	321	}
5908120f	322
c0ac53fa SM	323	u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
	324	{
	325	struct ath_mci_profile *mci = &sc->btcoex.mci;
	326	u16 aggr_limit = 0;
	327
	328	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
	329	aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
	330	else if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED)
	331	aggr_limit = min((max_4ms_framelen * 3) / 8,
	332	(u32)ATH_AMPDU_LIMIT_MAX);
	333
	334	return aggr_limit;
	335	}
	336
56ca0dba SM	337	void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
	338	{
	339	struct ath_hw *ah = sc->sc_ah;
	340
	341	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
	342	if (status & ATH9K_INT_GENTIMER)
	343	ath_gen_timer_isr(sc->sc_ah);
	344
	345	if ((status & ATH9K_INT_MCI) && ATH9K_HW_CAP_MCI)
	346	ath_mci_intr(sc);
	347	}
	348
df198b17 SM	349	void ath9k_start_btcoex(struct ath_softc *sc)
	350	{
	351	struct ath_hw *ah = sc->sc_ah;
	352
	353	if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
	354	!ah->btcoex_hw.enabled) {
	355	if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
	356	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	357	AR_STOMP_LOW_WLAN_WGHT);
	358	ath9k_hw_btcoex_enable(ah);
	359
	360	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
	361	ath9k_btcoex_timer_resume(sc);
	362	}
	363	}
	364
	365	void ath9k_stop_btcoex(struct ath_softc *sc)
	366	{
	367	struct ath_hw *ah = sc->sc_ah;
	368
	369	if (ah->btcoex_hw.enabled &&
	370	ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
	371	ath9k_hw_btcoex_disable(ah);
	372	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
	373	ath9k_btcoex_timer_pause(sc);
	374	ath_mci_flush_profile(&sc->btcoex.mci);
	375	}
	376	}
	377
5908120f SM	378	void ath9k_deinit_btcoex(struct ath_softc *sc)
	379	{
	380	if ((sc->btcoex.no_stomp_timer) &&
	381	ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE)
	382	ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
	383
	384	if (ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_MCI)
	385	ath_mci_cleanup(sc);
	386	}
	387
	388	int ath9k_init_btcoex(struct ath_softc *sc)
	389	{
	390	struct ath_txq *txq;
	391	struct ath_hw *ah = sc->sc_ah;
	392	int r;
	393
	394	switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
	395	case ATH_BTCOEX_CFG_NONE:
	396	break;
	397	case ATH_BTCOEX_CFG_2WIRE:
	398	ath9k_hw_btcoex_init_2wire(sc->sc_ah);
	399	break;
	400	case ATH_BTCOEX_CFG_3WIRE:
	401	ath9k_hw_btcoex_init_3wire(sc->sc_ah);
	402	r = ath_init_btcoex_timer(sc);
	403	if (r)
	404	return -1;
	405	txq = sc->tx.txq_map[WME_AC_BE];
	406	ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
	407	sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
	408	break;
	409	case ATH_BTCOEX_CFG_MCI:
	410	sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
	411	sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
	412	INIT_LIST_HEAD(&sc->btcoex.mci.info);
	413
	414	r = ath_mci_setup(sc);
	415	if (r)
	416	return r;
	417
	418	ath9k_hw_btcoex_init_mci(ah);
	419
	420	break;
	421	default:
	422	WARN_ON(1);
	423	break;
	424	}
	425
	426	return 0;
	427	}
4daa7760 SM	428
4daa7760 SM	429	#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */