[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 (AR_SREV_9100(sc->sc_ah))
		return;

	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))) {
		clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
		clear_bit(BT_OP_SCAN, &btcoex->op_flags);
		/* 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");
			set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
			set_bit(BT_OP_SCAN, &btcoex->op_flags);
		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
			ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
				"BT priority traffic detected\n");
			set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
		}

		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;
	struct ath_mci_profile *mci = &btcoex->mci;
	u32 timer_period;
	bool is_btscan;
	unsigned long flags;

	spin_lock_irqsave(&sc->sc_pm_lock, flags);
	if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) {
		spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
		goto skip_hw_wakeup;
	}
	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);

	ath9k_ps_wakeup(sc);
	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
		ath_detect_bt_priority(sc);
	is_btscan = test_bit(BT_OP_SCAN, &btcoex->op_flags);

	btcoex->bt_wait_time += btcoex->btcoex_period;
	if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) {
		if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) &&
		    (mci->num_pan || mci->num_other_acl))
			ah->btcoex_hw.mci.stomp_ftp =
				(sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH);
		else
			ah->btcoex_hw.mci.stomp_ftp = false;
		btcoex->bt_wait_time = 0;
		sc->rx.num_pkts = 0;
	}

	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);

	/*
	 * btcoex_period is in msec while (btocex/btscan_)no_stomp are in usec,
	 * ensure that we properly convert btcoex_period to usec
	 * for any comparision with (btcoex/btscan_)no_stomp.
	 */
	if (btcoex->btcoex_period * 1000 != 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);
skip_hw_wakeup:
	timer_period = btcoex->btcoex_period;
	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);

	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 ||
	    test_bit(BT_OP_SCAN, &btcoex->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(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;

	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 1000 *
		btcoex->btcoex_period / 100;
	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 1000 *
				   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");

	/* 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;
	clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
	clear_bit(BT_OP_SCAN, &btcoex->op_flags);

	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;
}

void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)
{
	struct ath_btcoex *btcoex = &sc->btcoex;

	if (btcoex->hw_timer_enabled)
		ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
}

u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
{
	struct ath_btcoex *btcoex = &sc->btcoex;
	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 (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags))
		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)
		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) {
		if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
			ath9k_btcoex_timer_pause(sc);
		ath9k_hw_btcoex_disable(ah);
		if (AR_SREV_9462(ah))
			ath_mci_flush_profile(&sc->btcoex.mci);
	}
}

void ath9k_deinit_btcoex(struct ath_softc *sc)
{
	struct ath_hw *ah = sc->sc_ah;

        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_mci_is_enabled(ah))
		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;

	ath9k_hw_btcoex_init_scheme(ah);

	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;
		if (ath9k_hw_mci_is_enabled(ah)) {
			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
7b27ba4e FF	44	if (AR_SREV_9100(sc->sc_ah))
	45	return;
	46
6de66dd9 FF	47	if (sc->sc_ah->led_pin < 0) {
	48	if (AR_SREV_9287(sc->sc_ah))
	49	sc->sc_ah->led_pin = ATH_LED_PIN_9287;
	50	else if (AR_SREV_9485(sc->sc_ah))
	51	sc->sc_ah->led_pin = ATH_LED_PIN_9485;
353e5019 SB	52	else if (AR_SREV_9300(sc->sc_ah))
353e5019 SB	53	sc->sc_ah->led_pin = ATH_LED_PIN_9300;
423e38e8 RM	54	else if (AR_SREV_9462(sc->sc_ah))
423e38e8 RM	55	sc->sc_ah->led_pin = ATH_LED_PIN_9462;
6de66dd9 FF	56	else
	57	sc->sc_ah->led_pin = ATH_LED_PIN_DEF;
	58	}
0fca65c1 S	59
	60	/* Configure gpio 1 for output */
	61	ath9k_hw_cfg_output(sc->sc_ah, sc->sc_ah->led_pin,
	62	AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
	63	/* LED off, active low */
	64	ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, 1);
	65
0cf55c21 FF	66	if (!led_blink)
	67	sc->led_cdev.default_trigger =
	68	ieee80211_get_radio_led_name(sc->hw);
	69
	70	snprintf(sc->led_name, sizeof(sc->led_name),
	71	"ath9k-%s", wiphy_name(sc->hw->wiphy));
	72	sc->led_cdev.name = sc->led_name;
	73	sc->led_cdev.brightness_set = ath_led_brightness;
	74
	75	ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
	76	if (ret < 0)
	77	return;
	78
	79	sc->led_registered = true;
0fca65c1	80	}
0cf55c21	81	#endif
0fca65c1 S	82
	83	/*******************/
	84	/* Rfkill */
	85	/*******************/
	86
	87	static bool ath_is_rfkill_set(struct ath_softc *sc)
	88	{
	89	struct ath_hw *ah = sc->sc_ah;
90826313	90	bool is_blocked;
0fca65c1	91
90826313 MSS	92	ath9k_ps_wakeup(sc);
90826313 MSS	93	is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
0fca65c1	94	ah->rfkill_polarity;
90826313 MSS	95	ath9k_ps_restore(sc);
	96
	97	return is_blocked;
0fca65c1 S	98	}
	99
	100	void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
	101	{
9ac58615	102	struct ath_softc *sc = hw->priv;
0fca65c1 S	103	bool blocked = !!ath_is_rfkill_set(sc);
	104
	105	wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
	106	}
	107
	108	void ath_start_rfkill_poll(struct ath_softc *sc)
	109	{
	110	struct ath_hw *ah = sc->sc_ah;
	111
	112	if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
	113	wiphy_rfkill_start_polling(sc->hw->wiphy);
	114	}
	115
4daa7760 SM	116	#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
4daa7760 SM	117
0fca65c1 S	118	/******************/
	119	/* BTCOEX */
	120	/******************/
	121
	122	/*
	123	* Detects if there is any priority bt traffic
	124	*/
	125	static void ath_detect_bt_priority(struct ath_softc *sc)
	126	{
	127	struct ath_btcoex *btcoex = &sc->btcoex;
	128	struct ath_hw *ah = sc->sc_ah;
	129
	130	if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
	131	btcoex->bt_priority_cnt++;
	132
	133	if (time_after(jiffies, btcoex->bt_priority_time +
	134	msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
e6930c4b SM	135	clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
e6930c4b SM	136	clear_bit(BT_OP_SCAN, &btcoex->op_flags);
58da1318 VT	137	/* Detect if colocated bt started scanning */
58da1318 VT	138	if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
d2182b69	139	ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
226afe68	140	"BT scan detected\n");
e6930c4b SM	141	set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
e6930c4b SM	142	set_bit(BT_OP_SCAN, &btcoex->op_flags);
58da1318	143	} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
d2182b69	144	ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
226afe68	145	"BT priority traffic detected\n");
e6930c4b	146	set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
0fca65c1 S	147	}
	148
	149	btcoex->bt_priority_cnt = 0;
	150	btcoex->bt_priority_time = jiffies;
	151	}
	152	}
	153
0fca65c1 S	154	static void ath9k_gen_timer_start(struct ath_hw *ah,
0fca65c1 S	155	struct ath_gen_timer *timer,
788f6875	156	u32 trig_timeout,
0fca65c1 S	157	u32 timer_period)
0fca65c1 S	158	{
788f6875	159	ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);
0fca65c1	160
3069168c	161	if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
4df3071e	162	ath9k_hw_disable_interrupts(ah);
3069168c	163	ah->imask \|= ATH9K_INT_GENTIMER;
72d874c6	164	ath9k_hw_set_interrupts(ah);
b037b693	165	ath9k_hw_enable_interrupts(ah);
0fca65c1 S	166	}
	167	}
	168
	169	static void ath9k_gen_timer_stop(struct ath_hw ah, struct ath_gen_timer timer)
	170	{
0fca65c1 S	171	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
	172
	173	ath9k_hw_gen_timer_stop(ah, timer);
	174
	175	/* if no timer is enabled, turn off interrupt mask */
	176	if (timer_table->timer_mask.val == 0) {
4df3071e	177	ath9k_hw_disable_interrupts(ah);
3069168c	178	ah->imask &= ~ATH9K_INT_GENTIMER;
72d874c6	179	ath9k_hw_set_interrupts(ah);
b037b693	180	ath9k_hw_enable_interrupts(ah);
0fca65c1 S	181	}
	182	}
	183
	184	/*
	185	* This is the master bt coex timer which runs for every
	186	* 45ms, bt traffic will be given priority during 55% of this
	187	* period while wlan gets remaining 45%
	188	*/
	189	static void ath_btcoex_period_timer(unsigned long data)
	190	{
	191	struct ath_softc sc = (struct ath_softc ) data;
	192	struct ath_hw *ah = sc->sc_ah;
	193	struct ath_btcoex *btcoex = &sc->btcoex;
6995fb80	194	struct ath_mci_profile *mci = &btcoex->mci;
58da1318 VT	195	u32 timer_period;
58da1318 VT	196	bool is_btscan;
08d4df41 RM	197	unsigned long flags;
	198
	199	spin_lock_irqsave(&sc->sc_pm_lock, flags);
	200	if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) {
	201	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
	202	goto skip_hw_wakeup;
	203	}
	204	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
0fca65c1	205
a039a993	206	ath9k_ps_wakeup(sc);
7dc181c2 RM	207	if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
7dc181c2 RM	208	ath_detect_bt_priority(sc);
e6930c4b	209	is_btscan = test_bit(BT_OP_SCAN, &btcoex->op_flags);
58da1318	210
6995fb80 RM	211	btcoex->bt_wait_time += btcoex->btcoex_period;
6995fb80 RM	212	if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) {
b98ccec0	213	if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) &&
6995fb80 RM	214	(mci->num_pan \|\| mci->num_other_acl))
	215	ah->btcoex_hw.mci.stomp_ftp =
	216	(sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH);
	217	else
	218	ah->btcoex_hw.mci.stomp_ftp = false;
	219	btcoex->bt_wait_time = 0;
	220	sc->rx.num_pkts = 0;
	221	}
	222
0fca65c1 S	223	spin_lock_bh(&btcoex->btcoex_lock);
0fca65c1 S	224
978f78bf	225	ath9k_hw_btcoex_bt_stomp(ah, is_btscan ? ATH_BTCOEX_STOMP_ALL :
58da1318	226	btcoex->bt_stomp_type);
0fca65c1	227
bc6d5c29	228	ath9k_hw_btcoex_enable(ah);
0fca65c1 S	229	spin_unlock_bh(&btcoex->btcoex_lock);
0fca65c1 S	230
94ae77ea MSS	231	/*
	232	* btcoex_period is in msec while (btocex/btscan_)no_stomp are in usec,
	233	* ensure that we properly convert btcoex_period to usec
	234	* for any comparision with (btcoex/btscan_)no_stomp.
	235	*/
	236	if (btcoex->btcoex_period * 1000 != btcoex->btcoex_no_stomp) {
0fca65c1 S	237	if (btcoex->hw_timer_enabled)
	238	ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
	239
58da1318 VT	240	timer_period = is_btscan ? btcoex->btscan_no_stomp :
58da1318 VT	241	btcoex->btcoex_no_stomp;
788f6875	242	ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period,
8eb1dabb	243	timer_period * 10);
0fca65c1 S	244	btcoex->hw_timer_enabled = true;
	245	}
	246
a039a993	247	ath9k_ps_restore(sc);
08d4df41	248	skip_hw_wakeup:
dfd0587a	249	timer_period = btcoex->btcoex_period;
e6930c4b	250	mod_timer(&btcoex->period_timer, jiffies + msecs_to_jiffies(timer_period));
0fca65c1 S	251	}
	252
	253	/*
	254	* Generic tsf based hw timer which configures weight
	255	* registers to time slice between wlan and bt traffic
	256	*/
	257	static void ath_btcoex_no_stomp_timer(void *arg)
	258	{
	259	struct ath_softc sc = (struct ath_softc )arg;
	260	struct ath_hw *ah = sc->sc_ah;
	261	struct ath_btcoex *btcoex = &sc->btcoex;
d99eeb87	262	struct ath_common *common = ath9k_hw_common(ah);
0fca65c1	263
d2182b69	264	ath_dbg(common, BTCOEX, "no stomp timer running\n");
0fca65c1	265
a039a993	266	ath9k_ps_wakeup(sc);
0fca65c1 S	267	spin_lock_bh(&btcoex->btcoex_lock);
0fca65c1 S	268
e6930c4b SM	269	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW \|\|
e6930c4b SM	270	test_bit(BT_OP_SCAN, &btcoex->op_flags))
978f78bf	271	ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
0fca65c1	272	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
978f78bf	273	ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
0fca65c1	274
bc6d5c29	275	ath9k_hw_btcoex_enable(ah);
0fca65c1	276	spin_unlock_bh(&btcoex->btcoex_lock);
a039a993	277	ath9k_ps_restore(sc);
0fca65c1 S	278	}
0fca65c1 S	279
df198b17	280	static int ath_init_btcoex_timer(struct ath_softc *sc)
0fca65c1 S	281	{
	282	struct ath_btcoex *btcoex = &sc->btcoex;
	283
dfd0587a RM	284	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
dfd0587a RM	285	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 1000 *
0fca65c1	286	btcoex->btcoex_period / 100;
dfd0587a	287	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 1000 *
58da1318	288	btcoex->btcoex_period / 100;
0fca65c1 S	289
	290	setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
	291	(unsigned long) sc);
	292
	293	spin_lock_init(&btcoex->btcoex_lock);
	294
	295	btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
	296	ath_btcoex_no_stomp_timer,
	297	ath_btcoex_no_stomp_timer,
	298	(void *) sc, AR_FIRST_NDP_TIMER);
	299
	300	if (!btcoex->no_stomp_timer)
	301	return -ENOMEM;
	302
	303	return 0;
	304	}
	305
	306	/*
	307	* (Re)start btcoex timers
	308	*/
	309	void ath9k_btcoex_timer_resume(struct ath_softc *sc)
	310	{
	311	struct ath_btcoex *btcoex = &sc->btcoex;
	312	struct ath_hw *ah = sc->sc_ah;
	313
d2182b69	314	ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");
0fca65c1 S	315
	316	/* make sure duty cycle timer is also stopped when resuming */
	317	if (btcoex->hw_timer_enabled)
	318	ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
	319
	320	btcoex->bt_priority_cnt = 0;
	321	btcoex->bt_priority_time = jiffies;
c11216d1 MSS	322	clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
c11216d1 MSS	323	clear_bit(BT_OP_SCAN, &btcoex->op_flags);
0fca65c1 S	324
	325	mod_timer(&btcoex->period_timer, jiffies);
	326	}
	327
	328
	329	/*
	330	* Pause btcoex timer and bt duty cycle timer
	331	*/
	332	void ath9k_btcoex_timer_pause(struct ath_softc *sc)
	333	{
	334	struct ath_btcoex *btcoex = &sc->btcoex;
	335	struct ath_hw *ah = sc->sc_ah;
	336
	337	del_timer_sync(&btcoex->period_timer);
	338
	339	if (btcoex->hw_timer_enabled)
	340	ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
	341
	342	btcoex->hw_timer_enabled = false;
	343	}
5908120f	344
08d4df41 RM	345	void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)
	346	{
	347	struct ath_btcoex *btcoex = &sc->btcoex;
	348
5d9b6f26 MSS	349	if (btcoex->hw_timer_enabled)
5d9b6f26 MSS	350	ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
08d4df41 RM	351	}
08d4df41 RM	352
c0ac53fa SM	353	u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
c0ac53fa SM	354	{
e6930c4b	355	struct ath_btcoex *btcoex = &sc->btcoex;
c0ac53fa SM	356	struct ath_mci_profile *mci = &sc->btcoex.mci;
	357	u16 aggr_limit = 0;
	358
	359	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
	360	aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
e6930c4b	361	else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags))
c0ac53fa SM	362	aggr_limit = min((max_4ms_framelen * 3) / 8,
	363	(u32)ATH_AMPDU_LIMIT_MAX);
	364
	365	return aggr_limit;
	366	}
	367
56ca0dba SM	368	void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
	369	{
	370	struct ath_hw *ah = sc->sc_ah;
	371
	372	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
	373	if (status & ATH9K_INT_GENTIMER)
	374	ath_gen_timer_isr(sc->sc_ah);
	375
9a15858f	376	if (status & ATH9K_INT_MCI)
56ca0dba SM	377	ath_mci_intr(sc);
	378	}
	379
df198b17 SM	380	void ath9k_start_btcoex(struct ath_softc *sc)
	381	{
	382	struct ath_hw *ah = sc->sc_ah;
	383
	384	if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
	385	!ah->btcoex_hw.enabled) {
	386	if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
	387	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	388	AR_STOMP_LOW_WLAN_WGHT);
	389	ath9k_hw_btcoex_enable(ah);
	390
	391	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
	392	ath9k_btcoex_timer_resume(sc);
	393	}
	394	}
	395
	396	void ath9k_stop_btcoex(struct ath_softc *sc)
	397	{
	398	struct ath_hw *ah = sc->sc_ah;
	399
	400	if (ah->btcoex_hw.enabled &&
	401	ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
df198b17 SM	402	if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
df198b17 SM	403	ath9k_btcoex_timer_pause(sc);
c32cdbd8	404	ath9k_hw_btcoex_disable(ah);
0466e254	405	if (AR_SREV_9462(ah))
bff2ec2b	406	ath_mci_flush_profile(&sc->btcoex.mci);
df198b17 SM	407	}
	408	}
	409
5908120f SM	410	void ath9k_deinit_btcoex(struct ath_softc *sc)
5908120f SM	411	{
dd89f05a MSS	412	struct ath_hw *ah = sc->sc_ah;
dd89f05a MSS	413
5908120f SM	414	if ((sc->btcoex.no_stomp_timer) &&
	415	ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE)
	416	ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
	417
dd89f05a	418	if (ath9k_hw_mci_is_enabled(ah))
5908120f SM	419	ath_mci_cleanup(sc);
	420	}
	421
	422	int ath9k_init_btcoex(struct ath_softc *sc)
	423	{
	424	struct ath_txq *txq;
	425	struct ath_hw *ah = sc->sc_ah;
	426	int r;
	427
d68475de SM	428	ath9k_hw_btcoex_init_scheme(ah);
d68475de SM	429
5908120f SM	430	switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
	431	case ATH_BTCOEX_CFG_NONE:
	432	break;
	433	case ATH_BTCOEX_CFG_2WIRE:
	434	ath9k_hw_btcoex_init_2wire(sc->sc_ah);
	435	break;
	436	case ATH_BTCOEX_CFG_3WIRE:
	437	ath9k_hw_btcoex_init_3wire(sc->sc_ah);
	438	r = ath_init_btcoex_timer(sc);
	439	if (r)
	440	return -1;
	441	txq = sc->tx.txq_map[WME_AC_BE];
	442	ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
	443	sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
81294489	444	if (ath9k_hw_mci_is_enabled(ah)) {
0466e254 RM	445	sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
0466e254 RM	446	INIT_LIST_HEAD(&sc->btcoex.mci.info);
5908120f	447
0466e254 RM	448	r = ath_mci_setup(sc);
	449	if (r)
	450	return r;
5908120f	451
0466e254 RM	452	ath9k_hw_btcoex_init_mci(ah);
0466e254 RM	453	}
5908120f SM	454
	455	break;
	456	default:
	457	WARN_ON(1);
	458	break;
	459	}
	460
	461	return 0;
	462	}
4daa7760 SM	463
4daa7760 SM	464	#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */