1 files changed, 135 insertions, 248 deletions

diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
index 55f607b7699e..fb4ac15f3b93 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.c
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -14,10 +14,26 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include "ath9k.h"
+#include "hw.h"
 
-static const struct ath_btcoex_config ath_bt_config = { 0, true, true,
-			ATH_BT_COEX_MODE_SLOTTED, true, true, 2, 5, true };
+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;
+};
 
 static const u16 ath_subsysid_tbl[] = {
 	AR9280_COEX2WIRE_SUBSYSID,
@@ -29,141 +45,38 @@ static const u16 ath_subsysid_tbl[] = {
  * Checks the subsystem id of the device to see if it
  * supports btcoex
  */
-bool ath_btcoex_supported(u16 subsysid)
+bool ath9k_hw_btcoex_supported(struct ath_hw *ah)
 {
 	int i;
 
-	if (!subsysid)
+	if (!ah->hw_version.subsysid)
 		return false;
 
 	for (i = 0; i < ARRAY_SIZE(ath_subsysid_tbl); i++)
-		if (subsysid == ath_subsysid_tbl[i])
+		if (ah->hw_version.subsysid == ath_subsysid_tbl[i])
 			return true;
 
 	return false;
 }
 
-/*
- * Detects if there is any priority bt traffic
- */
-static void ath_detect_bt_priority(struct ath_softc *sc)
-{
-	struct ath_btcoex_info *btinfo = &sc->btcoex_info;
-
-	if (ath9k_hw_gpio_get(sc->sc_ah, btinfo->btpriority_gpio))
-		btinfo->bt_priority_cnt++;
-
-	if (time_after(jiffies, btinfo->bt_priority_time +
-			msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
-		if (btinfo->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
-			DPRINTF(sc, ATH_DBG_BTCOEX,
-				"BT priority traffic detected");
-			sc->sc_flags |= SC_OP_BT_PRIORITY_DETECTED;
-		} else {
-			sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
-		}
-
-		btinfo->bt_priority_cnt = 0;
-		btinfo->bt_priority_time = jiffies;
-	}
-}
-
-/*
- * Configures appropriate weight based on stomp type.
- */
-static void ath_btcoex_bt_stomp(struct ath_softc *sc,
-				struct ath_btcoex_info *btinfo,
-				int stomp_type)
-{
-
-	switch (stomp_type) {
-	case ATH_BTCOEX_STOMP_ALL:
-		ath_btcoex_set_weight(btinfo, AR_BT_COEX_WGHT,
-				      AR_STOMP_ALL_WLAN_WGHT);
-		break;
-	case ATH_BTCOEX_STOMP_LOW:
-		ath_btcoex_set_weight(btinfo, AR_BT_COEX_WGHT,
-				      AR_STOMP_LOW_WLAN_WGHT);
-		break;
-	case ATH_BTCOEX_STOMP_NONE:
-		ath_btcoex_set_weight(btinfo, AR_BT_COEX_WGHT,
-				      AR_STOMP_NONE_WLAN_WGHT);
-		break;
-	default:
-		DPRINTF(sc, ATH_DBG_BTCOEX, "Invalid Stomptype\n");
-		break;
-	}
-
-	ath9k_hw_btcoex_enable(sc->sc_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_btcoex_info *btinfo = &sc->btcoex_info;
-
-	ath_detect_bt_priority(sc);
-
-	spin_lock_bh(&btinfo->btcoex_lock);
-
-	ath_btcoex_bt_stomp(sc, btinfo, btinfo->bt_stomp_type);
-
-	spin_unlock_bh(&btinfo->btcoex_lock);
-
-	if (btinfo->btcoex_period != btinfo->btcoex_no_stomp) {
-		if (btinfo->hw_timer_enabled)
-			ath_gen_timer_stop(sc->sc_ah, btinfo->no_stomp_timer);
-
-		ath_gen_timer_start(sc->sc_ah,
-			btinfo->no_stomp_timer,
-			(ath9k_hw_gettsf32(sc->sc_ah) +
-				btinfo->btcoex_no_stomp),
-				btinfo->btcoex_no_stomp * 10);
-		btinfo->hw_timer_enabled = true;
-	}
-
-	mod_timer(&btinfo->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_btcoex_info *btinfo = &sc->btcoex_info;
-
-	DPRINTF(sc, ATH_DBG_BTCOEX, "no stomp timer running \n");
-
-	spin_lock_bh(&btinfo->btcoex_lock);
-
-	if (btinfo->bt_stomp_type == ATH_BTCOEX_STOMP_LOW)
-		ath_btcoex_bt_stomp(sc, btinfo, ATH_BTCOEX_STOMP_NONE);
-	 else if (btinfo->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
-		ath_btcoex_bt_stomp(sc, btinfo, ATH_BTCOEX_STOMP_LOW);
-
-	spin_unlock_bh(&btinfo->btcoex_lock);
-}
-
-static int ath_init_btcoex_info(struct ath_hw *hw,
-				struct ath_btcoex_info *btcoex_info)
+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;
-	int qnum;
 
-	qnum = ath_tx_get_qnum(hw->ah_sc, ATH9K_TX_QUEUE_DATA, ATH9K_WME_AC_BE);
-
-	btcoex_info->bt_coex_mode =
-		(btcoex_info->bt_coex_mode & AR_BT_QCU_THRESH) |
+	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) |
@@ -174,167 +87,141 @@ static int ath_init_btcoex_info(struct ath_hw *hw,
 		SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
 		SM(qnum, AR_BT_QCU_THRESH);
 
-	btcoex_info->bt_coex_mode2 =
+	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;
 
-	btcoex_info->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
+	for (i = 0; i < 32; i++)
+		ah->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
+}
+EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
 
-	btcoex_info->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
+void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
+{
+	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
-	btcoex_info->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
-		btcoex_info->btcoex_period / 100;
+	/* 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));
 
-	for (i = 0; i < 32; i++)
-		hw->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
+	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
+		    AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
 
-	setup_timer(&btcoex_info->period_timer, ath_btcoex_period_timer,
-			(unsigned long) hw->ah_sc);
+	/* 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);
 
-	btcoex_info->no_stomp_timer = ath_gen_timer_alloc(hw,
-			ath_btcoex_no_stomp_timer,
-			ath_btcoex_no_stomp_timer,
-			(void *)hw->ah_sc, AR_FIRST_NDP_TIMER);
+	/* 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;
 
-	if (btcoex_info->no_stomp_timer == NULL)
-		return -ENOMEM;
+	/* 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));
 
-	spin_lock_init(&btcoex_info->btcoex_lock);
+	/* 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);
 
-	return 0;
+	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);
 
-int ath9k_hw_btcoex_init(struct ath_hw *ah)
+static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
 {
-	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
-	int ret = 0;
-
-	if (btcoex_info->btcoex_scheme == ATH_BTCOEX_CFG_2WIRE) {
-		/* 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_info->btactive_gpio);
-
-		/* Configure the desired gpio port for input */
-		ath9k_hw_cfg_gpio_input(ah, btcoex_info->btactive_gpio);
-	} else {
-		/* 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_info->btactive_gpio);
-
-		REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
-				AR_GPIO_INPUT_MUX1_BT_PRIORITY,
-				btcoex_info->btpriority_gpio);
-
-		/* Configure the desired GPIO ports for input */
-
-		ath9k_hw_cfg_gpio_input(ah, btcoex_info->btactive_gpio);
-		ath9k_hw_cfg_gpio_input(ah, btcoex_info->btpriority_gpio);
-
-		ret = ath_init_btcoex_info(ah, btcoex_info);
-	}
+	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
-	return ret;
+	/* 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_enable(struct ath_hw *ah)
+void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
+				u32 bt_weight,
+				u32 wlan_weight)
 {
-	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
-
-	if (btcoex_info->btcoex_scheme == ATH_BTCOEX_CFG_2WIRE) {
-		/* Configure the desired GPIO port for TX_FRAME output */
-		ath9k_hw_cfg_output(ah, btcoex_info->wlanactive_gpio,
-				AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
-	} else {
-		/*
-		 * Program coex mode and weight registers to
-		 * enable coex 3-wire
-		 */
-		REG_WRITE(ah, AR_BT_COEX_MODE, btcoex_info->bt_coex_mode);
-		REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex_info->bt_coex_weights);
-		REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_info->bt_coex_mode2);
-
-		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_info->wlanactive_gpio,
-				AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
-	}
+	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
-	REG_RMW(ah, AR_GPIO_PDPU,
-		(0x2 << (btcoex_info->btactive_gpio * 2)),
-		(0x3 << (btcoex_info->btactive_gpio * 2)));
-
-	ah->ah_sc->sc_flags |= SC_OP_BTCOEX_ENABLED;
+	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);
 
-void ath9k_hw_btcoex_disable(struct ath_hw *ah)
+static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
 {
-	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
+	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
-	ath9k_hw_set_gpio(ah, btcoex_info->wlanactive_gpio, 0);
+	/*
+	 * 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_WEIGHT, btcoex_hw->bt_coex_weights);
+	REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex_hw->bt_coex_mode2);
 
-	ath9k_hw_cfg_output(ah, btcoex_info->wlanactive_gpio,
-			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+	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);
 
-	if (btcoex_info->btcoex_scheme == ATH_BTCOEX_CFG_3WIRE) {
-		REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
-		REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
-		REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
-	}
-
-	ah->ah_sc->sc_flags &= ~SC_OP_BTCOEX_ENABLED;
+	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
+			    AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
 }
 
-/*
- * Pause btcoex timer and bt duty cycle timer
- */
-void ath_btcoex_timer_pause(struct ath_softc *sc,
-			    struct ath_btcoex_info *btinfo)
+void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 {
+	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
-	del_timer_sync(&btinfo->period_timer);
+	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;
+	}
 
-	if (btinfo->hw_timer_enabled)
-		ath_gen_timer_stop(sc->sc_ah, btinfo->no_stomp_timer);
+	REG_RMW(ah, AR_GPIO_PDPU,
+		(0x2 << (btcoex_hw->btactive_gpio * 2)),
+		(0x3 << (btcoex_hw->btactive_gpio * 2)));
 
-	btinfo->hw_timer_enabled = false;
+	ah->btcoex_hw.enabled = true;
 }
+EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
 
-/*
- * (Re)start btcoex timers
- */
-void ath_btcoex_timer_resume(struct ath_softc *sc,
-			     struct ath_btcoex_info *btinfo)
+void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 {
+	struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
 
-	DPRINTF(sc, ATH_DBG_BTCOEX, "Starting btcoex timers");
+	ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
 
-	/* make sure duty cycle timer is also stopped when resuming */
-	if (btinfo->hw_timer_enabled)
-		ath_gen_timer_stop(sc->sc_ah, btinfo->no_stomp_timer);
+	ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
+			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 
-	btinfo->bt_priority_cnt = 0;
-	btinfo->bt_priority_time = jiffies;
-	sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
+	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_WEIGHT, 0);
+		REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
+	}
 
-	mod_timer(&btinfo->period_timer, jiffies);
+	ah->btcoex_hw.enabled = false;
 }
+EXPORT_SYMBOL(ath9k_hw_btcoex_disable);