[PATCH 0/8] ath9k: WLAN-BT coexistence clean up and 3-wire support

[PATCH 0/8] ath9k: WLAN-BT coexistence clean up and 3-wire support

[Vasanthakumar Thiagarajan]

John,

This series has WLAN-BT coex 3-wire support and clean ups in BT coex
part.

Vasanth

Vasanthakumar Thiagarajan (8):
  ath9k: Split ath9k_hw_btcoex_enable() into two logical pieces
  ath9k: Move btcoex stuff from hw.[ch] to new btcoex.[ch]
  ath9k: Configure btcoex register during every reset
  ath9k: Move btcoex related data to a separate struct
  ath9k: Determine btcoex scheme type based on chip version
  ath9k: Remove hw capability bit meant for btcoex
  ath9k: Add infrastructure for generic hw timers
  ath9k: Add Bluetooth Coexistence 3-wire support

 drivers/net/wireless/ath/ath9k/Makefile |    3 +-
 drivers/net/wireless/ath/ath9k/ath9k.h  |    5 +
 drivers/net/wireless/ath/ath9k/btcoex.c |  319 +++++++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath9k/btcoex.h |   98 ++++++++++
 drivers/net/wireless/ath/ath9k/debug.h  |    2 +
 drivers/net/wireless/ath/ath9k/hw.c     |  239 +++++++++++++++++++++--
 drivers/net/wireless/ath/ath9k/hw.h     |   57 +++++-
 drivers/net/wireless/ath/ath9k/main.c   |   33 +++-
 drivers/net/wireless/ath/ath9k/reg.h    |   64 ++++++-
 drivers/net/wireless/ath/ath9k/xmit.c   |    9 +-
 10 files changed, 795 insertions(+), 34 deletions(-)
 create mode 100644 drivers/net/wireless/ath/ath9k/btcoex.c
 create mode 100644 drivers/net/wireless/ath/ath9k/btcoex.h

[PATCH 1/8] ath9k: Split ath9k_hw_btcoex_enable() into two logical pieces

[Vasanthakumar Thiagarajan]

This function currently does initialization + enable the
btcoex support. Split it into two logical functions which
does the above operations separately. Btcoex initialization
is done during attach time and enabling this feature is done
in start(). Also, add code to disable btcoex support in stop().

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/ath9k.h |    1 +
 drivers/net/wireless/ath/ath9k/hw.c    |   17 ++++++++++++++++-
 drivers/net/wireless/ath/ath9k/hw.h    |    2 ++
 drivers/net/wireless/ath/ath9k/main.c  |   11 +++++++++--
 4 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 7705da1..0868800 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -521,6 +521,7 @@ struct ath_led {
 #define SC_OP_WAIT_FOR_PSPOLL_DATA BIT(17)
 #define SC_OP_WAIT_FOR_TX_ACK   BIT(18)
 #define SC_OP_BEACON_SYNC       BIT(19)
+#define SC_OP_BTCOEX_ENABLED    BIT(20)
 
 struct ath_bus_ops {
 	void		(*read_cachesize)(struct ath_softc *sc, int *csz);
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 4f3d5ea..d81e826 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -4073,7 +4073,7 @@ void ath9k_hw_set11nmac2040(struct ath_hw *ah, enum ath9k_ht_macmode mode)
 /*  Bluetooth Coexistence  */
 /***************************/
 
-void ath9k_hw_btcoex_enable(struct ath_hw *ah)
+void ath9k_hw_btcoex_init(struct ath_hw *ah)
 {
 	/* connect bt_active to baseband */
 	REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
@@ -4090,8 +4090,23 @@ void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 
 	/* Configure the desired gpio port for input */
 	ath9k_hw_cfg_gpio_input(ah, ah->btactive_gpio);
+}
 
+void ath9k_hw_btcoex_enable(struct ath_hw *ah)
+{
 	/* Configure the desired GPIO port for TX_FRAME output */
 	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
 			    AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
+
+	ah->ah_sc->sc_flags |= SC_OP_BTCOEX_ENABLED;
+}
+
+void ath9k_hw_btcoex_disable(struct ath_hw *ah)
+{
+	ath9k_hw_set_gpio(ah, ah->wlanactive_gpio, 0);
+
+	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
+			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+
+	ah->ah_sc->sc_flags &= ~SC_OP_BTCOEX_ENABLED;
 }
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index b24150a..e634cb4 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -614,6 +614,8 @@ bool ath9k_hw_intrpend(struct ath_hw *ah);
 bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked);
 enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints);
 
+void ath9k_hw_btcoex_init(struct ath_hw *ah);
 void ath9k_hw_btcoex_enable(struct ath_hw *ah);
+void ath9k_hw_btcoex_disable(struct ath_hw *ah);
 
 #endif
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index eb8d673..878d3be 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1509,8 +1509,8 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc)
 			ARRAY_SIZE(ath9k_5ghz_chantable);
 	}
 
-	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX)
-		ath9k_hw_btcoex_enable(sc->sc_ah);
+	if (ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX)
+		ath9k_hw_btcoex_init(ah);
 
 	return 0;
 bad2:
@@ -1992,6 +1992,10 @@ static int ath9k_start(struct ieee80211_hw *hw)
 
 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 
+	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX) &&
+	    !(sc->sc_flags & SC_OP_BTCOEX_ENABLED))
+		ath9k_hw_btcoex_enable(sc->sc_ah);
+
 mutex_unlock:
 	mutex_unlock(&sc->mutex);
 
@@ -2138,6 +2142,9 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 
 	wiphy_rfkill_stop_polling(sc->hw->wiphy);
 
+	if (sc->sc_flags & SC_OP_BTCOEX_ENABLED)
+		ath9k_hw_btcoex_disable(sc->sc_ah);
+
 	/* disable HAL and put h/w to sleep */
 	ath9k_hw_disable(sc->sc_ah);
 	ath9k_hw_configpcipowersave(sc->sc_ah, 1);
-- 
1.5.5.1

[PATCH 2/8] ath9k: Move btcoex stuff from hw.[ch] to new btcoex.[ch]

[Vasanthakumar Thiagarajan]

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/Makefile |    3 +-
 drivers/net/wireless/ath/ath9k/ath9k.h  |    1 +
 drivers/net/wireless/ath/ath9k/btcoex.c |   55 +++++++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath9k/btcoex.h |   24 +++++++++++++
 drivers/net/wireless/ath/ath9k/hw.c     |   42 -----------------------
 drivers/net/wireless/ath/ath9k/hw.h     |    4 --
 6 files changed, 82 insertions(+), 47 deletions(-)
 create mode 100644 drivers/net/wireless/ath/ath9k/btcoex.c
 create mode 100644 drivers/net/wireless/ath/ath9k/btcoex.h

diff --git a/drivers/net/wireless/ath/ath9k/Makefile b/drivers/net/wireless/ath/ath9k/Makefile
index 28443e0..ff2c9a2 100644
--- a/drivers/net/wireless/ath/ath9k/Makefile
+++ b/drivers/net/wireless/ath/ath9k/Makefile
@@ -12,7 +12,8 @@ ath9k-y +=	hw.o \
 		recv.o \
 		xmit.o \
 		virtual.o \
-		rc.o
+		rc.o \
+		btcoex.o
 
 ath9k-$(CONFIG_PCI) += pci.o
 ath9k-$(CONFIG_ATHEROS_AR71XX) += ahb.o
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 0868800..1a8d679 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -26,6 +26,7 @@
 #include "rc.h"
 #include "debug.h"
 #include "../ath.h"
+#include "btcoex.h"
 
 struct ath_node;
 
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
new file mode 100644
index 0000000..abaf92d
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 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"
+
+void ath9k_hw_btcoex_init(struct ath_hw *ah)
+{
+	/* 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,
+			ah->btactive_gpio);
+
+	/* Configure the desired gpio port for input */
+	ath9k_hw_cfg_gpio_input(ah, ah->btactive_gpio);
+}
+
+void ath9k_hw_btcoex_enable(struct ath_hw *ah)
+{
+	/* Configure the desired GPIO port for TX_FRAME output */
+	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
+			    AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
+
+	ah->ah_sc->sc_flags |= SC_OP_BTCOEX_ENABLED;
+}
+
+void ath9k_hw_btcoex_disable(struct ath_hw *ah)
+{
+	ath9k_hw_set_gpio(ah, ah->wlanactive_gpio, 0);
+
+	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
+			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+
+	ah->ah_sc->sc_flags &= ~SC_OP_BTCOEX_ENABLED;
+}
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
new file mode 100644
index 0000000..9954280
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 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.
+ */
+
+#ifndef BTCOEX_H
+#define BTCOEX_H
+
+void ath9k_hw_btcoex_init(struct ath_hw *ah);
+void ath9k_hw_btcoex_enable(struct ath_hw *ah);
+void ath9k_hw_btcoex_disable(struct ath_hw *ah);
+
+#endif
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index d81e826..c3ecc7e 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -4068,45 +4068,3 @@ void ath9k_hw_set11nmac2040(struct ath_hw *ah, enum ath9k_ht_macmode mode)
 
 	REG_WRITE(ah, AR_2040_MODE, macmode);
 }
-
-/***************************/
-/*  Bluetooth Coexistence  */
-/***************************/
-
-void ath9k_hw_btcoex_init(struct ath_hw *ah)
-{
-	/* 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,
-			ah->btactive_gpio);
-
-	/* Configure the desired gpio port for input */
-	ath9k_hw_cfg_gpio_input(ah, ah->btactive_gpio);
-}
-
-void ath9k_hw_btcoex_enable(struct ath_hw *ah)
-{
-	/* Configure the desired GPIO port for TX_FRAME output */
-	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
-			    AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
-
-	ah->ah_sc->sc_flags |= SC_OP_BTCOEX_ENABLED;
-}
-
-void ath9k_hw_btcoex_disable(struct ath_hw *ah)
-{
-	ath9k_hw_set_gpio(ah, ah->wlanactive_gpio, 0);
-
-	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
-			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
-
-	ah->ah_sc->sc_flags &= ~SC_OP_BTCOEX_ENABLED;
-}
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index e634cb4..32f7c4b 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -614,8 +614,4 @@ bool ath9k_hw_intrpend(struct ath_hw *ah);
 bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked);
 enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints);
 
-void ath9k_hw_btcoex_init(struct ath_hw *ah);
-void ath9k_hw_btcoex_enable(struct ath_hw *ah);
-void ath9k_hw_btcoex_disable(struct ath_hw *ah);
-
 #endif
-- 
1.5.5.1

[PATCH 3/8] ath9k: Configure btcoex register during every reset

[Vasanthakumar Thiagarajan]

Make sure btcoex register configured with appropriate values
after it is initialized with the default values from initvals.h
during reset.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/hw.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index c3ecc7e..d7e03f9 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2555,6 +2555,9 @@ int ath9k_hw_reset(struct ath_hw *ah, struct ath9k_channel *chan,
 #endif
 	}
 
+	if (ah->ah_sc->sc_flags & SC_OP_BTCOEX_ENABLED)
+		ath9k_hw_btcoex_enable(ah);
+
 	return 0;
 }
 
-- 
1.5.5.1

[PATCH 4/8] ath9k: Move btcoex related data to a separate struct

[Vasanthakumar Thiagarajan]

Also define macros for wlanactive and btactive (5 & 6) gpios.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/ath9k.h  |    1 +
 drivers/net/wireless/ath/ath9k/btcoex.c |   16 +++++++++++-----
 drivers/net/wireless/ath/ath9k/btcoex.h |    8 ++++++++
 drivers/net/wireless/ath/ath9k/hw.c     |    4 ++--
 drivers/net/wireless/ath/ath9k/hw.h     |    2 --
 5 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 1a8d679..83f2c8f 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -611,6 +611,7 @@ struct ath_softc {
 	struct ath_bus_ops *bus_ops;
 	struct ath_beacon_config cur_beacon_conf;
 	struct delayed_work tx_complete_work;
+	struct ath_btcoex_info btcoex_info;
 };
 
 struct ath_wiphy {
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
index abaf92d..9f19cd1 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.c
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -18,6 +18,8 @@
 
 void ath9k_hw_btcoex_init(struct ath_hw *ah)
 {
+	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
+
 	/* connect bt_active to baseband */
 	REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
 			(AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
@@ -29,16 +31,18 @@ void ath9k_hw_btcoex_init(struct ath_hw *ah)
 	/* Set input mux for bt_active to gpio pin */
 	REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
 			AR_GPIO_INPUT_MUX1_BT_ACTIVE,
-			ah->btactive_gpio);
+			btcoex_info->btactive_gpio);
 
 	/* Configure the desired gpio port for input */
-	ath9k_hw_cfg_gpio_input(ah, ah->btactive_gpio);
+	ath9k_hw_cfg_gpio_input(ah, btcoex_info->btactive_gpio);
 }
 
 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 {
+	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
+
 	/* Configure the desired GPIO port for TX_FRAME output */
-	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
+	ath9k_hw_cfg_output(ah, btcoex_info->wlanactive_gpio,
 			    AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
 
 	ah->ah_sc->sc_flags |= SC_OP_BTCOEX_ENABLED;
@@ -46,9 +50,11 @@ void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 
 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 {
-	ath9k_hw_set_gpio(ah, ah->wlanactive_gpio, 0);
+	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
+
+	ath9k_hw_set_gpio(ah, btcoex_info->wlanactive_gpio, 0);
 
-	ath9k_hw_cfg_output(ah, ah->wlanactive_gpio,
+	ath9k_hw_cfg_output(ah, btcoex_info->wlanactive_gpio,
 			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 
 	ah->ah_sc->sc_flags &= ~SC_OP_BTCOEX_ENABLED;
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
index 9954280..c80492b 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.h
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -17,6 +17,14 @@
 #ifndef BTCOEX_H
 #define BTCOEX_H
 
+#define ATH_WLANACTIVE_GPIO	5
+#define ATH_BTACTIVE_GPIO	6
+
+struct ath_btcoex_info {
+	u8 wlanactive_gpio;
+	u8 btactive_gpio;
+};
+
 void ath9k_hw_btcoex_init(struct ath_hw *ah);
 void ath9k_hw_btcoex_enable(struct ath_hw *ah);
 void ath9k_hw_btcoex_disable(struct ath_hw *ah);
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index d7e03f9..3bb6abd 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -3666,8 +3666,8 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
 
 	if (AR_SREV_9280_10_OR_LATER(ah) && btcoex_enable) {
 		pCap->hw_caps |= ATH9K_HW_CAP_BT_COEX;
-		ah->btactive_gpio = 6;
-		ah->wlanactive_gpio = 5;
+		ah->ah_sc->btcoex_info.btactive_gpio = ATH_BTACTIVE_GPIO;
+		ah->ah_sc->btcoex_info.wlanactive_gpio = ATH_WLANACTIVE_GPIO;
 	}
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 32f7c4b..259936c 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -414,8 +414,6 @@ struct ath_hw {
 	u16 rfsilent;
 	u32 rfkill_gpio;
 	u32 rfkill_polarity;
-	u32 btactive_gpio;
-	u32 wlanactive_gpio;
 	u32 ah_flags;
 
 	bool htc_reset_init;
-- 
1.5.5.1

[PATCH 5/8] ath9k: Determine btcoex scheme type based on chip version

[Vasanthakumar Thiagarajan]

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/btcoex.h |    7 +++++++
 drivers/net/wireless/ath/ath9k/hw.c     |   12 ++++++++++--
 drivers/net/wireless/ath/ath9k/main.c   |    4 +++-
 3 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
index c80492b..cdfa80d 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.h
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -20,7 +20,14 @@
 #define ATH_WLANACTIVE_GPIO	5
 #define ATH_BTACTIVE_GPIO	6
 
+enum ath_btcoex_scheme {
+	ATH_BTCOEX_CFG_NONE,
+	ATH_BTCOEX_CFG_2WIRE,
+	ATH_BTCOEX_CFG_3WIRE,
+};
+
 struct ath_btcoex_info {
+	enum ath_btcoex_scheme btcoex_scheme;
 	u8 wlanactive_gpio;
 	u8 btactive_gpio;
 };
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 3bb6abd..7b4bc8b 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -3489,6 +3489,7 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
 {
 	struct ath9k_hw_capabilities *pCap = &ah->caps;
 	struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
+	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
 
 	u16 capField = 0, eeval;
 
@@ -3666,8 +3667,15 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
 
 	if (AR_SREV_9280_10_OR_LATER(ah) && btcoex_enable) {
 		pCap->hw_caps |= ATH9K_HW_CAP_BT_COEX;
-		ah->ah_sc->btcoex_info.btactive_gpio = ATH_BTACTIVE_GPIO;
-		ah->ah_sc->btcoex_info.wlanactive_gpio = ATH_WLANACTIVE_GPIO;
+		btcoex_info->btactive_gpio = ATH_BTACTIVE_GPIO;
+		btcoex_info->wlanactive_gpio = ATH_WLANACTIVE_GPIO;
+
+		if (AR_SREV_9285(ah))
+			btcoex_info->btcoex_scheme = ATH_BTCOEX_CFG_3WIRE;
+		else
+			btcoex_info->btcoex_scheme = ATH_BTCOEX_CFG_2WIRE;
+	} else {
+		btcoex_info->btcoex_scheme = ATH_BTCOEX_CFG_NONE;
 	}
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 878d3be..8a2f000 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1509,7 +1509,8 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc)
 			ARRAY_SIZE(ath9k_5ghz_chantable);
 	}
 
-	if (ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX)
+	if ((ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX) &&
+	    (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE))
 		ath9k_hw_btcoex_init(ah);
 
 	return 0;
@@ -1993,6 +1994,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 
 	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX) &&
+	    (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE) &&
 	    !(sc->sc_flags & SC_OP_BTCOEX_ENABLED))
 		ath9k_hw_btcoex_enable(sc->sc_ah);
 
-- 
1.5.5.1

[PATCH 6/8] ath9k: Remove hw capability bit meant for btcoex

[Vasanthakumar Thiagarajan]

We don't need a hw cap bit for btcoex anymore as btcoex scheme type
is enough to do this.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/hw.c   |    1 -
 drivers/net/wireless/ath/ath9k/hw.h   |    1 -
 drivers/net/wireless/ath/ath9k/main.c |    8 +++-----
 3 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 7b4bc8b..c80be8c 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -3666,7 +3666,6 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
 		ah->eep_ops->get_num_ant_config(ah, ATH9K_HAL_FREQ_BAND_2GHZ);
 
 	if (AR_SREV_9280_10_OR_LATER(ah) && btcoex_enable) {
-		pCap->hw_caps |= ATH9K_HW_CAP_BT_COEX;
 		btcoex_info->btactive_gpio = ATH_BTACTIVE_GPIO;
 		btcoex_info->wlanactive_gpio = ATH_WLANACTIVE_GPIO;
 
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 259936c..de10de8 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -151,7 +151,6 @@ enum ath9k_hw_caps {
 	ATH9K_HW_CAP_ENHANCEDPM                 = BIT(14),
 	ATH9K_HW_CAP_AUTOSLEEP                  = BIT(15),
 	ATH9K_HW_CAP_4KB_SPLITTRANS             = BIT(16),
-	ATH9K_HW_CAP_BT_COEX			= BIT(17)
 };
 
 enum ath9k_capability_type {
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 8a2f000..215c672 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -440,7 +440,7 @@ static void ath_start_ani(struct ath_softc *sc)
 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
 {
 	if ((sc->sc_flags & SC_OP_SCANNING) || is_ht ||
-	    (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX)) {
+	    (sc->btcoex_info.btcoex_scheme != ATH_BTCOEX_CFG_NONE)) {
 		sc->tx_chainmask = sc->sc_ah->caps.tx_chainmask;
 		sc->rx_chainmask = sc->sc_ah->caps.rx_chainmask;
 	} else {
@@ -1509,8 +1509,7 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc)
 			ARRAY_SIZE(ath9k_5ghz_chantable);
 	}
 
-	if ((ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX) &&
-	    (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE))
+	if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE)
 		ath9k_hw_btcoex_init(ah);
 
 	return 0;
@@ -1993,8 +1992,7 @@ static int ath9k_start(struct ieee80211_hw *hw)
 
 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 
-	if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_BT_COEX) &&
-	    (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE) &&
+	if ((sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE) &&
 	    !(sc->sc_flags & SC_OP_BTCOEX_ENABLED))
 		ath9k_hw_btcoex_enable(sc->sc_ah);
 
-- 
1.5.5.1

[PATCH 7/8] ath9k: Add infrastructure for generic hw timers

[Vasanthakumar Thiagarajan]

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/debug.h |    1 +
 drivers/net/wireless/ath/ath9k/hw.c    |  212 ++++++++++++++++++++++++++++++++
 drivers/net/wireless/ath/ath9k/hw.h    |   52 ++++++++
 drivers/net/wireless/ath/ath9k/reg.h   |   15 ++-
 4 files changed, 278 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index 5e56b79..ea0dd1e 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -30,6 +30,7 @@ enum ATH_DEBUG {
 	ATH_DBG_CONFIG		= 0x00000200,
 	ATH_DBG_FATAL		= 0x00000400,
 	ATH_DBG_PS		= 0x00000800,
+	ATH_DBG_HWTIMER		= 0x00001000,
 	ATH_DBG_ANY		= 0xffffffff
 };
 
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index c80be8c..3afd7a9 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -3215,6 +3215,23 @@ bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked)
 	if (AR_SREV_9100(ah))
 		return true;
 
+	if (isr & AR_ISR_GENTMR) {
+		u32 s5_s;
+
+		s5_s = REG_READ(ah, AR_ISR_S5_S);
+		if (isr & AR_ISR_GENTMR) {
+			ah->intr_gen_timer_trigger =
+				MS(s5_s, AR_ISR_S5_GENTIMER_TRIG);
+
+			ah->intr_gen_timer_thresh =
+				MS(s5_s, AR_ISR_S5_GENTIMER_THRESH);
+
+			if (ah->intr_gen_timer_trigger)
+				*masked |= ATH9K_INT_GENTIMER;
+
+		}
+	}
+
 	if (sync_cause) {
 		fatal_int =
 			(sync_cause &
@@ -4078,3 +4095,198 @@ void ath9k_hw_set11nmac2040(struct ath_hw *ah, enum ath9k_ht_macmode mode)
 
 	REG_WRITE(ah, AR_2040_MODE, macmode);
 }
+
+/* HW Generic timers configuration */
+
+static const struct ath_gen_timer_configuration gen_tmr_configuration[] =
+{
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP_TIMER, AR_NDP_PERIOD, AR_TIMER_MODE, 0x0080},
+	{AR_NEXT_NDP2_TIMER, AR_NDP2_PERIOD, AR_NDP2_TIMER_MODE, 0x0001},
+	{AR_NEXT_NDP2_TIMER + 1*4, AR_NDP2_PERIOD + 1*4,
+				AR_NDP2_TIMER_MODE, 0x0002},
+	{AR_NEXT_NDP2_TIMER + 2*4, AR_NDP2_PERIOD + 2*4,
+				AR_NDP2_TIMER_MODE, 0x0004},
+	{AR_NEXT_NDP2_TIMER + 3*4, AR_NDP2_PERIOD + 3*4,
+				AR_NDP2_TIMER_MODE, 0x0008},
+	{AR_NEXT_NDP2_TIMER + 4*4, AR_NDP2_PERIOD + 4*4,
+				AR_NDP2_TIMER_MODE, 0x0010},
+	{AR_NEXT_NDP2_TIMER + 5*4, AR_NDP2_PERIOD + 5*4,
+				AR_NDP2_TIMER_MODE, 0x0020},
+	{AR_NEXT_NDP2_TIMER + 6*4, AR_NDP2_PERIOD + 6*4,
+				AR_NDP2_TIMER_MODE, 0x0040},
+	{AR_NEXT_NDP2_TIMER + 7*4, AR_NDP2_PERIOD + 7*4,
+				AR_NDP2_TIMER_MODE, 0x0080}
+};
+
+/* HW generic timer primitives */
+
+/* compute and clear index of rightmost 1 */
+static u32 rightmost_index(struct ath_gen_timer_table *timer_table, u32 *mask)
+{
+	u32 b;
+
+	b = *mask;
+	b &= (0-b);
+	*mask &= ~b;
+	b *= debruijn32;
+	b >>= 27;
+
+	return timer_table->gen_timer_index[b];
+}
+
+static u32 ath9k_hw_gettsf32(struct ath_hw *ah)
+{
+	return REG_READ(ah, AR_TSF_L32);
+}
+
+struct ath_gen_timer *ath_gen_timer_alloc(struct ath_hw *ah,
+					  void (*trigger)(void *),
+					  void (*overflow)(void *),
+					  void *arg,
+					  u8 timer_index)
+{
+	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+	struct ath_gen_timer *timer;
+
+	timer = kzalloc(sizeof(struct ath_gen_timer), GFP_KERNEL);
+
+	if (timer == NULL) {
+		printk(KERN_DEBUG "Failed to allocate memory"
+		       "for hw timer[%d]\n", timer_index);
+		return NULL;
+	}
+
+	/* allocate a hardware generic timer slot */
+	timer_table->timers[timer_index] = timer;
+	timer->index = timer_index;
+	timer->trigger = trigger;
+	timer->overflow = overflow;
+	timer->arg = arg;
+
+	return timer;
+}
+
+void ath_gen_timer_start(struct ath_hw *ah,
+			 struct ath_gen_timer *timer,
+			 u32 timer_next, u32 timer_period)
+{
+	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+	u32 tsf;
+
+	BUG_ON(!timer_period);
+
+	set_bit(timer->index, &timer_table->timer_mask.timer_bits);
+
+	tsf = ath9k_hw_gettsf32(ah);
+
+	DPRINTF(ah->ah_sc, ATH_DBG_HWTIMER, "curent tsf %x period %x"
+		"timer_next %x\n", tsf, timer_period, timer_next);
+
+	/*
+	 * Pull timer_next forward if the current TSF already passed it
+	 * because of software latency
+	 */
+	if (timer_next < tsf)
+		timer_next = tsf + timer_period;
+
+	/*
+	 * Program generic timer registers
+	 */
+	REG_WRITE(ah, gen_tmr_configuration[timer->index].next_addr,
+		 timer_next);
+	REG_WRITE(ah, gen_tmr_configuration[timer->index].period_addr,
+		  timer_period);
+	REG_SET_BIT(ah, gen_tmr_configuration[timer->index].mode_addr,
+		    gen_tmr_configuration[timer->index].mode_mask);
+
+	/* Enable both trigger and thresh interrupt masks */
+	REG_SET_BIT(ah, AR_IMR_S5,
+		(SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_THRESH) |
+		SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_TRIG)));
+
+	if ((ah->ah_sc->imask & ATH9K_INT_GENTIMER) == 0) {
+		ath9k_hw_set_interrupts(ah, 0);
+		ah->ah_sc->imask |= ATH9K_INT_GENTIMER;
+		ath9k_hw_set_interrupts(ah, ah->ah_sc->imask);
+	}
+}
+
+void ath_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
+{
+	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+
+	if ((timer->index < AR_FIRST_NDP_TIMER) ||
+		(timer->index >= ATH_MAX_GEN_TIMER)) {
+		return;
+	}
+
+	/* Clear generic timer enable bits. */
+	REG_CLR_BIT(ah, gen_tmr_configuration[timer->index].mode_addr,
+			gen_tmr_configuration[timer->index].mode_mask);
+
+	/* Disable both trigger and thresh interrupt masks */
+	REG_CLR_BIT(ah, AR_IMR_S5,
+		(SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_THRESH) |
+		SM(AR_GENTMR_BIT(timer->index), AR_IMR_S5_GENTIMER_TRIG)));
+
+	clear_bit(timer->index, &timer_table->timer_mask.timer_bits);
+
+	/* if no timer is enabled, turn off interrupt mask */
+	if (timer_table->timer_mask.val == 0) {
+		ath9k_hw_set_interrupts(ah, 0);
+		ah->ah_sc->imask &= ~ATH9K_INT_GENTIMER;
+		ath9k_hw_set_interrupts(ah, ah->ah_sc->imask);
+	}
+}
+
+void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer)
+{
+	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+
+	/* free the hardware generic timer slot */
+	timer_table->timers[timer->index] = NULL;
+	kfree(timer);
+}
+
+/*
+ * Generic Timer Interrupts handling
+ */
+void ath_gen_timer_isr(struct ath_hw *ah)
+{
+	struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
+	struct ath_gen_timer *timer;
+	u32 trigger_mask, thresh_mask, index;
+
+	/* get hardware generic timer interrupt status */
+	trigger_mask = ah->intr_gen_timer_trigger;
+	thresh_mask = ah->intr_gen_timer_thresh;
+	trigger_mask &= timer_table->timer_mask.val;
+	thresh_mask &= timer_table->timer_mask.val;
+
+	trigger_mask &= ~thresh_mask;
+
+	while (thresh_mask) {
+		index = rightmost_index(timer_table, &thresh_mask);
+		timer = timer_table->timers[index];
+		BUG_ON(!timer);
+		DPRINTF(ah->ah_sc, ATH_DBG_HWTIMER,
+			"TSF overflow for Gen timer %d\n", index);
+		timer->overflow(timer->arg);
+	}
+
+	while (trigger_mask) {
+		index = rightmost_index(timer_table, &trigger_mask);
+		timer = timer_table->timers[index];
+		BUG_ON(!timer);
+		DPRINTF(ah->ah_sc, ATH_DBG_HWTIMER,
+			"Gen timer[%d] trigger\n", index);
+		timer->trigger(timer->arg);
+	}
+}
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index de10de8..052a9c4 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -237,6 +237,7 @@ enum ath9k_int {
 	ATH9K_INT_GPIO = 0x01000000,
 	ATH9K_INT_CABEND = 0x02000000,
 	ATH9K_INT_TSFOOR = 0x04000000,
+	ATH9K_INT_GENTIMER = 0x08000000,
 	ATH9K_INT_CST = 0x10000000,
 	ATH9K_INT_GTT = 0x20000000,
 	ATH9K_INT_FATAL = 0x40000000,
@@ -390,6 +391,41 @@ struct ath9k_hw_version {
 	u16 analog2GhzRev;
 };
 
+/* Generic TSF timer definitions */
+
+#define ATH_MAX_GEN_TIMER	16
+
+#define AR_GENTMR_BIT(_index)	(1 << (_index))
+
+/*
+ * Using de Bruijin sequence to to look up 1's index in a 32 bit number
+ * debruijn32 = 0000 0111 0111 1100 1011 0101 0011 0001
+ */
+#define debruijn32 0x077CB531UL
+
+struct ath_gen_timer_configuration {
+	u32 next_addr;
+	u32 period_addr;
+	u32 mode_addr;
+	u32 mode_mask;
+};
+
+struct ath_gen_timer {
+	void (*trigger)(void *arg);
+	void (*overflow)(void *arg);
+	void *arg;
+	u8 index;
+};
+
+struct ath_gen_timer_table {
+	u32 gen_timer_index[32];
+	struct ath_gen_timer *timers[ATH_MAX_GEN_TIMER];
+	union {
+		unsigned long timer_bits;
+		u16 val;
+	} timer_mask;
+};
+
 struct ath_hw {
 	struct ath_softc *ah_sc;
 	struct ath9k_hw_version hw_version;
@@ -536,6 +572,10 @@ struct ath_hw {
 	struct ar5416IniArray iniModesAdditional;
 	struct ar5416IniArray iniModesRxGain;
 	struct ar5416IniArray iniModesTxGain;
+
+	u32 intr_gen_timer_trigger;
+	u32 intr_gen_timer_thresh;
+	struct ath_gen_timer_table hw_gen_timers;
 };
 
 /* Initialization, Detach, Reset */
@@ -611,4 +651,16 @@ bool ath9k_hw_intrpend(struct ath_hw *ah);
 bool ath9k_hw_getisr(struct ath_hw *ah, enum ath9k_int *masked);
 enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints);
 
+/* Generic hw timer primitives */
+struct ath_gen_timer *ath_gen_timer_alloc(struct ath_hw *ah,
+					  void (*trigger)(void *),
+					  void (*overflow)(void *),
+					  void *arg,
+					  u8 timer_index);
+void ath_gen_timer_start(struct ath_hw *ah, struct ath_gen_timer *timer,
+			 u32 timer_next, u32 timer_period);
+void ath_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer);
+void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer);
+void ath_gen_timer_isr(struct ath_hw *hw);
+
 #endif
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index c9e1ac9..1d8e0a8 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -234,7 +234,15 @@
 #define AR_IMR_S5                   0x00b8
 #define AR_IMR_S5_TIM_TIMER         0x00000010
 #define AR_IMR_S5_DTIM_TIMER        0x00000020
-
+#define AR_ISR_S5_GENTIMER_TRIG     0x0000FF80
+#define AR_ISR_S5_GENTIMER_TRIG_S   0
+#define AR_ISR_S5_GENTIMER_THRESH   0xFF800000
+#define AR_ISR_S5_GENTIMER_THRESH_S 16
+#define AR_ISR_S5_S                 0x00d8
+#define AR_IMR_S5_GENTIMER_TRIG     0x0000FF80
+#define AR_IMR_S5_GENTIMER_TRIG_S   0
+#define AR_IMR_S5_GENTIMER_THRESH   0xFF800000
+#define AR_IMR_S5_GENTIMER_THRESH_S 16
 
 #define AR_IMR               0x00a0
 #define AR_IMR_RXOK          0x00000001
@@ -1516,7 +1524,10 @@ enum {
 #define AR_TXOP_8_11   0x81f8
 #define AR_TXOP_12_15  0x81fc
 
-
+#define AR_NEXT_NDP2_TIMER                  0x8180
+#define AR_FIRST_NDP_TIMER                  7
+#define AR_NDP2_PERIOD                      0x81a0
+#define AR_NDP2_TIMER_MODE                  0x81c0
 #define AR_NEXT_TBTT_TIMER                  0x8200
 #define AR_NEXT_DMA_BEACON_ALERT            0x8204
 #define AR_NEXT_SWBA                        0x8208
-- 
1.5.5.1

[PATCH 8/8] ath9k: Add Bluetooth Coexistence 3-wire support

[Vasanthakumar Thiagarajan]

This patch adds 3-wire bluetooth coex support for AR9285.
This support can be enabled through btcoex_enable modparam.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
---
 drivers/net/wireless/ath/ath9k/ath9k.h  |    2 +
 drivers/net/wireless/ath/ath9k/btcoex.c |  290 +++++++++++++++++++++++++++++--
 drivers/net/wireless/ath/ath9k/btcoex.h |   61 +++++++-
 drivers/net/wireless/ath/ath9k/debug.h  |    1 +
 drivers/net/wireless/ath/ath9k/hw.c     |    2 +-
 drivers/net/wireless/ath/ath9k/hw.h     |    2 +
 drivers/net/wireless/ath/ath9k/main.c   |   34 +++-
 drivers/net/wireless/ath/ath9k/reg.h    |   49 +++++
 drivers/net/wireless/ath/ath9k/xmit.c   |    9 +-
 9 files changed, 423 insertions(+), 27 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 83f2c8f..1c68a9d 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -523,6 +523,7 @@ struct ath_led {
 #define SC_OP_WAIT_FOR_TX_ACK   BIT(18)
 #define SC_OP_BEACON_SYNC       BIT(19)
 #define SC_OP_BTCOEX_ENABLED    BIT(20)
+#define SC_OP_BT_PRIORITY_DETECTED BIT(21)
 
 struct ath_bus_ops {
 	void		(*read_cachesize)(struct ath_softc *sc, int *csz);
@@ -708,4 +709,5 @@ bool ath9k_all_wiphys_idle(struct ath_softc *sc);
 void ath9k_iowrite32(struct ath_hw *ah, u32 reg_offset, u32 val);
 unsigned int ath9k_ioread32(struct ath_hw *ah, u32 reg_offset);
 
+int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype);
 #endif /* ATH9K_H */
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
index 9f19cd1..8fb3567 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.c
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -16,34 +16,251 @@
 
 #include "ath9k.h"
 
-void ath9k_hw_btcoex_init(struct ath_hw *ah)
+static const struct ath_btcoex_config ath_bt_config = { 0, true, true,
+			ATH_BT_COEX_MODE_SLOTTED, true, true, 2, 5, true };
+
+
+/*
+ * 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;
+	unsigned long flags;
+
+	ath_detect_bt_priority(sc);
+
+	spin_lock_irqsave(&btinfo->btcoex_lock, flags);
+
+	ath_btcoex_bt_stomp(sc, btinfo, btinfo->bt_stomp_type);
+
+	spin_unlock_irqrestore(&btinfo->btcoex_lock, flags);
+
+	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;
+	unsigned long flags;
+
+	DPRINTF(sc, ATH_DBG_BTCOEX, "no stomp timer running \n");
+
+	spin_lock_irqsave(&btinfo->btcoex_lock, flags);
+
+	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_irqrestore(&btinfo->btcoex_lock, flags);
+}
+
+static int ath_init_btcoex_info(struct ath_hw *hw,
+				struct ath_btcoex_info *btcoex_info)
+{
+	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) |
+		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(ath_bt_config.bt_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_info->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;
+
+	btcoex_info->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD * 1000;
+
+	btcoex_info->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
+		btcoex_info->btcoex_period / 100;
+
+	for (i = 0; i < 32; i++)
+		hw->hw_gen_timers.gen_timer_index[(debruijn32 << i) >> 27] = i;
+
+	setup_timer(&btcoex_info->period_timer, ath_btcoex_period_timer,
+			(unsigned long) hw->ah_sc);
+
+	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);
+
+	if (btcoex_info->no_stomp_timer == NULL)
+		return -ENOMEM;
+
+	spin_lock_init(&btcoex_info->btcoex_lock);
+
+	return 0;
+}
+
+int ath9k_hw_btcoex_init(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);
 
-	/* 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));
+		/* 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));
 
-	REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
-			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);
 
-	/* 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);
+		REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
+				AR_GPIO_INPUT_MUX1_BT_PRIORITY,
+				btcoex_info->btpriority_gpio);
 
-	/* Configure the desired gpio port for input */
-	ath9k_hw_cfg_gpio_input(ah, btcoex_info->btactive_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);
+	}
+
+	return ret;
 }
 
 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
 {
 	struct ath_btcoex_info *btcoex_info = &ah->ah_sc->btcoex_info;
 
-	/* 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);
+	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);
+	}
+
+	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;
 }
@@ -57,5 +274,46 @@ void ath9k_hw_btcoex_disable(struct ath_hw *ah)
 	ath9k_hw_cfg_output(ah, btcoex_info->wlanactive_gpio,
 			AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
 
+	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;
 }
+
+/*
+ * Pause btcoex timer and bt duty cycle timer
+ */
+void ath_btcoex_timer_pause(struct ath_softc *sc,
+			    struct ath_btcoex_info *btinfo)
+{
+
+	del_timer_sync(&btinfo->period_timer);
+
+	if (btinfo->hw_timer_enabled)
+		ath_gen_timer_stop(sc->sc_ah, btinfo->no_stomp_timer);
+
+	btinfo->hw_timer_enabled = false;
+}
+
+/*
+ * (Re)start btcoex timers
+ */
+void ath_btcoex_timer_resume(struct ath_softc *sc,
+			     struct ath_btcoex_info *btinfo)
+{
+
+	DPRINTF(sc, ATH_DBG_BTCOEX, "Starting btcoex timers");
+
+	/* 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);
+
+	btinfo->bt_priority_cnt = 0;
+	btinfo->bt_priority_time = jiffies;
+	sc->sc_flags &= ~SC_OP_BT_PRIORITY_DETECTED;
+
+	mod_timer(&btinfo->period_timer, jiffies);
+}
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
index cdfa80d..4556819 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.h
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -20,20 +20,79 @@
 #define ATH_WLANACTIVE_GPIO	5
 #define ATH_BTACTIVE_GPIO	6
 
+#define ATH_BTCOEX_DEF_BT_PERIOD  45
+#define ATH_BTCOEX_DEF_DUTY_CYCLE 55
+#define ATH_BTCOEX_BMISS_THRESH   50
+
+#define ATH_BT_PRIORITY_TIME_THRESHOLD 1000 /* ms */
+#define ATH_BT_CNT_THRESHOLD	       3
+
 enum ath_btcoex_scheme {
 	ATH_BTCOEX_CFG_NONE,
 	ATH_BTCOEX_CFG_2WIRE,
 	ATH_BTCOEX_CFG_3WIRE,
 };
 
+enum ath_stomp_type {
+	ATH_BTCOEX_NO_STOMP,
+	ATH_BTCOEX_STOMP_ALL,
+	ATH_BTCOEX_STOMP_LOW,
+	ATH_BTCOEX_STOMP_NONE
+};
+
+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;
+};
+
 struct ath_btcoex_info {
 	enum ath_btcoex_scheme btcoex_scheme;
 	u8 wlanactive_gpio;
 	u8 btactive_gpio;
+	u8 btpriority_gpio;
+	u8 bt_duty_cycle; 	/* BT duty cycle in percentage */
+	int bt_stomp_type; 	/* Types of BT stomping */
+	u32 bt_coex_mode; 	/* Register setting for AR_BT_COEX_MODE */
+	u32 bt_coex_weights; 	/* Register setting for AR_BT_COEX_WEIGHT */
+	u32 bt_coex_mode2; 	/* Register setting for AR_BT_COEX_MODE2 */
+	u32 btcoex_no_stomp;   /* in usec */
+	u32 btcoex_period;     	/* in usec */
+	u32 bt_priority_cnt;
+	unsigned long bt_priority_time;
+	bool hw_timer_enabled;
+	spinlock_t btcoex_lock;
+	struct timer_list period_timer;      /* Timer for BT period */
+	struct ath_gen_timer *no_stomp_timer; /*Timer for no BT stomping*/
 };
 
-void ath9k_hw_btcoex_init(struct ath_hw *ah);
+int ath9k_hw_btcoex_init(struct ath_hw *ah);
 void ath9k_hw_btcoex_enable(struct ath_hw *ah);
 void ath9k_hw_btcoex_disable(struct ath_hw *ah);
+void ath_btcoex_timer_resume(struct ath_softc *sc,
+			     struct ath_btcoex_info *btinfo);
+void ath_btcoex_timer_pause(struct ath_softc *sc,
+			    struct ath_btcoex_info *btinfo);
+
+static inline void ath_btcoex_set_weight(struct ath_btcoex_info *btcoex_info,
+					 u32 bt_weight,
+					 u32 wlan_weight)
+{
+	btcoex_info->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
+				       SM(wlan_weight, AR_BTCOEX_WL_WGHT);
+}
 
 #endif
diff --git a/drivers/net/wireless/ath/ath9k/debug.h b/drivers/net/wireless/ath/ath9k/debug.h
index ea0dd1e..7241f47 100644
--- a/drivers/net/wireless/ath/ath9k/debug.h
+++ b/drivers/net/wireless/ath/ath9k/debug.h
@@ -31,6 +31,7 @@ enum ATH_DEBUG {
 	ATH_DBG_FATAL		= 0x00000400,
 	ATH_DBG_PS		= 0x00000800,
 	ATH_DBG_HWTIMER		= 0x00001000,
+	ATH_DBG_BTCOEX		= 0x00002000,
 	ATH_DBG_ANY		= 0xffffffff
 };
 
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 3afd7a9..e340dac 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -4141,7 +4141,7 @@ static u32 rightmost_index(struct ath_gen_timer_table *timer_table, u32 *mask)
 	return timer_table->gen_timer_index[b];
 }
 
-static u32 ath9k_hw_gettsf32(struct ath_hw *ah)
+u32 ath9k_hw_gettsf32(struct ath_hw *ah)
 {
 	return REG_READ(ah, AR_TSF_L32);
 }
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 052a9c4..5ca6ffa 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -79,6 +79,7 @@
 #define AR_GPIO_OUTPUT_MUX_AS_PCIE_ATTENTION_LED 1
 #define AR_GPIO_OUTPUT_MUX_AS_PCIE_POWER_LED     2
 #define AR_GPIO_OUTPUT_MUX_AS_TX_FRAME           3
+#define AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL  4
 #define AR_GPIO_OUTPUT_MUX_AS_MAC_NETWORK_LED    5
 #define AR_GPIO_OUTPUT_MUX_AS_MAC_POWER_LED      6
 
@@ -662,5 +663,6 @@ void ath_gen_timer_start(struct ath_hw *ah, struct ath_gen_timer *timer,
 void ath_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer);
 void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer);
 void ath_gen_timer_isr(struct ath_hw *hw);
+u32 ath9k_hw_gettsf32(struct ath_hw *ah);
 
 #endif
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 215c672..4fae699 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -602,6 +602,10 @@ irqreturn_t ath_isr(int irq, void *dev)
 			sc->sc_flags |= SC_OP_WAIT_FOR_BEACON;
 		}
 
+	if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
+		if (status & ATH9K_INT_GENTIMER)
+			ath_gen_timer_isr(ah);
+
 chip_reset:
 
 	ath_debug_stat_interrupt(sc, status);
@@ -1279,6 +1283,10 @@ void ath_detach(struct ath_softc *sc)
 		if (ATH_TXQ_SETUP(sc, i))
 			ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 
+	if ((sc->btcoex_info.no_stomp_timer) &&
+	    sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
+		ath_gen_timer_free(sc->sc_ah, sc->btcoex_info.no_stomp_timer);
+
 	ath9k_hw_detach(sc->sc_ah);
 	sc->sc_ah = NULL;
 	ath9k_exit_debug(sc);
@@ -1509,8 +1517,11 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc)
 			ARRAY_SIZE(ath9k_5ghz_chantable);
 	}
 
-	if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE)
-		ath9k_hw_btcoex_init(ah);
+	if (sc->btcoex_info.btcoex_scheme != ATH_BTCOEX_CFG_NONE) {
+		r = ath9k_hw_btcoex_init(ah);
+		if (r)
+			goto bad2;
+	}
 
 	return 0;
 bad2:
@@ -1992,10 +2003,16 @@ static int ath9k_start(struct ieee80211_hw *hw)
 
 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
 
-	if ((sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_2WIRE) &&
-	    !(sc->sc_flags & SC_OP_BTCOEX_ENABLED))
+	if ((sc->btcoex_info.btcoex_scheme != ATH_BTCOEX_CFG_NONE) &&
+	    !(sc->sc_flags & SC_OP_BTCOEX_ENABLED)) {
+		ath_btcoex_set_weight(&sc->btcoex_info, AR_BT_COEX_WGHT,
+				      AR_STOMP_LOW_WLAN_WGHT);
 		ath9k_hw_btcoex_enable(sc->sc_ah);
 
+		if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
+			ath_btcoex_timer_resume(sc, &sc->btcoex_info);
+	}
+
 mutex_unlock:
 	mutex_unlock(&sc->mutex);
 
@@ -2129,6 +2146,12 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 		return; /* another wiphy still in use */
 	}
 
+	if (sc->sc_flags & SC_OP_BTCOEX_ENABLED) {
+		ath9k_hw_btcoex_disable(sc->sc_ah);
+		if (sc->btcoex_info.btcoex_scheme == ATH_BTCOEX_CFG_3WIRE)
+			ath_btcoex_timer_pause(sc, &sc->btcoex_info);
+	}
+
 	/* make sure h/w will not generate any interrupt
 	 * before setting the invalid flag. */
 	ath9k_hw_set_interrupts(sc->sc_ah, 0);
@@ -2142,9 +2165,6 @@ static void ath9k_stop(struct ieee80211_hw *hw)
 
 	wiphy_rfkill_stop_polling(sc->hw->wiphy);
 
-	if (sc->sc_flags & SC_OP_BTCOEX_ENABLED)
-		ath9k_hw_btcoex_disable(sc->sc_ah);
-
 	/* disable HAL and put h/w to sleep */
 	ath9k_hw_disable(sc->sc_ah);
 	ath9k_hw_configpcipowersave(sc->sc_ah, 1);
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index 1d8e0a8..3ddb243 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -970,6 +970,8 @@ enum {
 #define AR_GPIO_INPUT_EN_VAL_RFSILENT_DEF_S      7
 #define AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB        0x00001000
 #define AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB_S      12
+#define AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB      0x00001000
+#define AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB_S    1
 #define AR_GPIO_INPUT_EN_VAL_RFSILENT_BB         0x00008000
 #define AR_GPIO_INPUT_EN_VAL_RFSILENT_BB_S       15
 #define AR_GPIO_RTC_RESET_OVERRIDE_ENABLE        0x00010000
@@ -978,6 +980,8 @@ enum {
 #define AR_GPIO_INPUT_MUX1                       0x4058
 #define AR_GPIO_INPUT_MUX1_BT_ACTIVE             0x000f0000
 #define AR_GPIO_INPUT_MUX1_BT_ACTIVE_S           16
+#define AR_GPIO_INPUT_MUX1_BT_PRIORITY           0x00000f00
+#define AR_GPIO_INPUT_MUX1_BT_PRIORITY_S         8
 
 #define AR_GPIO_INPUT_MUX2                       0x405c
 #define AR_GPIO_INPUT_MUX2_CLK25                 0x0000000f
@@ -1003,6 +1007,8 @@ enum {
 
 #define AR_OBS                  0x4080
 
+#define AR_GPIO_PDPU                             0x4088
+
 #define AR_PCIE_MSI                              0x4094
 #define AR_PCIE_MSI_ENABLE                       0x00000001
 
@@ -1436,6 +1442,7 @@ enum {
 #define AR_QUIET1_NEXT_QUIET_M         0x0000ffff
 #define AR_QUIET1_QUIET_ENABLE         0x00010000
 #define AR_QUIET1_QUIET_ACK_CTS_ENABLE 0x00020000
+#define AR_QUIET1_QUIET_ACK_CTS_ENABLE_S 17
 #define AR_QUIET2          0x8100
 #define AR_QUIET2_QUIET_PERIOD_S       0
 #define AR_QUIET2_QUIET_PERIOD_M       0x0000ffff
@@ -1481,6 +1488,8 @@ enum {
 #define AR_PCU_CLEAR_VMF           0x01000000
 #define AR_PCU_CLEAR_BA_VALID      0x04000000
 
+#define AR_PCU_BT_ANT_PREVENT_RX   0x00100000
+#define AR_PCU_BT_ANT_PREVENT_RX_S 20
 
 #define AR_FILT_OFDM           0x8124
 #define AR_FILT_OFDM_COUNT     0x00FFFFFF
@@ -1508,6 +1517,46 @@ enum {
 #define AR_PHY_ERR_3_COUNT     0x00FFFFFF
 #define AR_PHY_ERR_MASK_3      0x816c
 
+#define AR_BT_COEX_MODE            0x8170
+#define AR_BT_TIME_EXTEND          0x000000ff
+#define AR_BT_TIME_EXTEND_S        0
+#define AR_BT_TXSTATE_EXTEND       0x00000100
+#define AR_BT_TXSTATE_EXTEND_S     8
+#define AR_BT_TX_FRAME_EXTEND      0x00000200
+#define AR_BT_TX_FRAME_EXTEND_S    9
+#define AR_BT_MODE                 0x00000c00
+#define AR_BT_MODE_S               10
+#define AR_BT_QUIET                0x00001000
+#define AR_BT_QUIET_S              12
+#define AR_BT_QCU_THRESH           0x0001e000
+#define AR_BT_QCU_THRESH_S         13
+#define AR_BT_RX_CLEAR_POLARITY    0x00020000
+#define AR_BT_RX_CLEAR_POLARITY_S  17
+#define AR_BT_PRIORITY_TIME        0x00fc0000
+#define AR_BT_PRIORITY_TIME_S      18
+#define AR_BT_FIRST_SLOT_TIME      0xff000000
+#define AR_BT_FIRST_SLOT_TIME_S    24
+
+#define AR_BT_COEX_WEIGHT          0x8174
+#define AR_BT_COEX_WGHT		   0xff55
+#define AR_STOMP_ALL_WLAN_WGHT	   0xffcc
+#define AR_STOMP_LOW_WLAN_WGHT	   0xaaa8
+#define AR_STOMP_NONE_WLAN_WGHT	   0xaa00
+#define AR_BTCOEX_BT_WGHT          0x0000ffff
+#define AR_BTCOEX_BT_WGHT_S        0
+#define AR_BTCOEX_WL_WGHT          0xffff0000
+#define AR_BTCOEX_WL_WGHT_S        16
+
+#define AR_BT_COEX_MODE2           0x817c
+#define AR_BT_BCN_MISS_THRESH      0x000000ff
+#define AR_BT_BCN_MISS_THRESH_S    0
+#define AR_BT_BCN_MISS_CNT         0x0000ff00
+#define AR_BT_BCN_MISS_CNT_S       8
+#define AR_BT_HOLD_RX_CLEAR        0x00010000
+#define AR_BT_HOLD_RX_CLEAR_S      16
+#define AR_BT_DISABLE_BT_ANT       0x00100000
+#define AR_BT_DISABLE_BT_ANT_S     20
+
 #define AR_TXSIFS              0x81d0
 #define AR_TXSIFS_TIME         0x000000FF
 #define AR_TXSIFS_TX_LATENCY   0x00000F00
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 87762da..42551a4 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -493,7 +493,12 @@ static u32 ath_lookup_rate(struct ath_softc *sc, struct ath_buf *bf,
 	if (tx_info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE || legacy)
 		return 0;
 
-	aggr_limit = min(max_4ms_framelen, (u32)ATH_AMPDU_LIMIT_MAX);
+	if (sc->sc_flags & SC_OP_BT_PRIORITY_DETECTED)
+		aggr_limit = min((max_4ms_framelen * 3) / 8,
+				 (u32)ATH_AMPDU_LIMIT_MAX);
+	else
+		aggr_limit = min(max_4ms_framelen,
+				 (u32)ATH_AMPDU_LIMIT_MAX);
 
 	/*
 	 * h/w can accept aggregates upto 16 bit lengths (65535).
@@ -872,7 +877,7 @@ struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype)
 	return &sc->tx.txq[qnum];
 }
 
-static int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
+int ath_tx_get_qnum(struct ath_softc *sc, int qtype, int haltype)
 {
 	int qnum;
 
-- 
1.5.5.1