ath9k_hw: fix BT RF performance

When software rfkill is triggered, before put the chip in reset
state, give LNA and SPDT control to BT to make sure BT can have
good RF performance.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_mci.c b/drivers/net/wireless/ath/ath9k/ar9003_mci.c
index 854dff66a63f..8b09a8239c1c 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_mci.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_mci.c
@@ -1391,3 +1391,19 @@ u32 ar9003_mci_state(struct ath_hw *ah, u32 state_type, u32 *p_data)
         return value;
 }
 EXPORT_SYMBOL(ar9003_mci_state);
+
+void ar9003_mci_bt_gain_ctrl(struct ath_hw *ah)
+{
+        struct ath_common *common = ath9k_hw_common(ah);
+        struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
+
+        ath_dbg(common, MCI, "Give LNA and SPDT control to BT\n");
+
+        REG_SET_BIT(ah, AR_PHY_GLB_CONTROL, AR_BTCOEX_CTRL_BT_OWN_SPDT_CTRL);
+        mci->is_2g = false;
+        mci->update_2g5g = true;
+        ar9003_mci_send_2g5g_status(ah, true);
+
+        /* Force another 2g5g update at next scanning */
+        mci->update_2g5g = true;
+}