ath9k: Enable btcoex based on the subsystem id of the device

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

4 files changed, 30 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/btcoex.c b/drivers/net/wireless/ath/ath9k/btcoex.c
index e8bfb01ee78a..55f607b7699e 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.c
+++ b/drivers/net/wireless/ath/ath9k/btcoex.c
@@ -19,6 +19,29 @@
 static const struct ath_btcoex_config ath_bt_config = { 0, true, true,
                         ATH_BT_COEX_MODE_SLOTTED, true, true, 2, 5, true };
 
+static const u16 ath_subsysid_tbl[] = {
+        AR9280_COEX2WIRE_SUBSYSID,
+        AT9285_COEX3WIRE_SA_SUBSYSID,
+        AT9285_COEX3WIRE_DA_SUBSYSID
+};
+
+/*
+ * Checks the subsystem id of the device to see if it
+ * supports btcoex
+ */
+bool ath_btcoex_supported(u16 subsysid)
+{
+        int i;
+
+        if (!subsysid)
+                return false;
+
+        for (i = 0; i < ARRAY_SIZE(ath_subsysid_tbl); i++)
+                if (subsysid == ath_subsysid_tbl[i])
+                        return true;
+
+        return false;
+}
 
 /*
  * Detects if there is any priority bt traffic
diff --git a/drivers/net/wireless/ath/ath9k/btcoex.h b/drivers/net/wireless/ath/ath9k/btcoex.h
index 45568196c59a..f1baf66e2ecd 100644
--- a/drivers/net/wireless/ath/ath9k/btcoex.h
+++ b/drivers/net/wireless/ath/ath9k/btcoex.h
@@ -79,6 +79,7 @@ struct ath_btcoex_info {
         struct ath_gen_timer *no_stomp_timer; /*Timer for no BT stomping*/
 };
 
+bool ath_btcoex_supported(u16 subsysid);
 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);
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 97a09dba76de..8d77817f67a4 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -3690,7 +3690,8 @@ void ath9k_hw_fill_cap_info(struct ath_hw *ah)
         pCap->num_antcfg_2ghz =
                 ah->eep_ops->get_num_ant_config(ah, ATH9K_HAL_FREQ_BAND_2GHZ);
 
-        if (AR_SREV_9280_10_OR_LATER(ah) && btcoex_enable) {
+        if (AR_SREV_9280_10_OR_LATER(ah) &&
+            ath_btcoex_supported(ah->hw_version.subsysid)) {
                 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 64ea547adef0..9106a0b537dd 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -45,6 +45,10 @@
 #define AR5416_DEVID_AR9287_PCI  0x002D
 #define AR5416_DEVID_AR9287_PCIE 0x002E
 
+#define AR9280_COEX2WIRE_SUBSYSID       0x309b
+#define AT9285_COEX3WIRE_SA_SUBSYSID    0x30aa
+#define AT9285_COEX3WIRE_DA_SUBSYSID    0x30ab
+
 /* Register read/write primitives */
 #define REG_WRITE(_ah, _reg, _val) ath9k_iowrite32((_ah), (_reg), (_val))
 #define REG_READ(_ah, _reg) ath9k_ioread32((_ah), (_reg))