ath9k: Enable Bluetooth Coexistence support

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath9k/hw.c b/drivers/net/wireless/ath9k/hw.c
index 19144caa7977..3c026e6b2453 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -3341,6 +3341,12 @@ bool ath9k_hw_fill_cap_info(struct ath_hal *ah)
         pCap->num_antcfg_2ghz =
                 ath9k_hw_get_num_ant_config(ah, ATH9K_HAL_FREQ_BAND_2GHZ);
 
+        if (AR_SREV_9280_10_OR_LATER(ah)) {
+                pCap->hw_caps |= ATH9K_HW_CAP_BT_COEX;
+                ah->ah_btactive_gpio = 6;
+                ah->ah_wlanactive_gpio = 5;
+        }
+
         return true;
 }
 
@@ -3836,3 +3842,30 @@ void ath9k_hw_set11nmac2040(struct ath_hal *ah, enum ath9k_ht_macmode mode)
 
         REG_WRITE(ah, AR_2040_MODE, macmode);
 }
+
+/***************************/
+/*  Bluetooth Coexistence  */
+/***************************/
+
+void ath9k_hw_btcoex_enable(struct ath_hal *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->ah_btactive_gpio);
+
+        /* Configure the desired gpio port for input */
+        ath9k_hw_cfg_gpio_input(ah, ah->ah_btactive_gpio);
+
+        /* Configure the desired GPIO port for TX_FRAME output */
+        ath9k_hw_cfg_output(ah, ah->ah_wlanactive_gpio,
+                            AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
+}