ath9k_hw: Add support for MCI WLAN calibration

WLAN communicates with BT for its calibration by sending WLAN_CAL_REQ,
waits for BT_CAL_GRANT. This is done with the help of GPM messages.
also WLAN_CAL_DONE messages is sent once WLAN calibration is done.

Cc: Wilson Tsao <wtsao@qca.qualcomm.com>
Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index e5407df..ddeba86 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -18,6 +18,7 @@
 #include "hw-ops.h"
 #include "ar9003_phy.h"
 #include "ar9003_rtt.h"
+#include "ar9003_mci.h"
 
 #define MAX_MEASUREMENT        MAX_IQCAL_MEASUREMENT
 #define MAX_MAG_DELTA  11
@@ -934,10 +935,12 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah,
 {
        struct ath_common *common = ath9k_hw_common(ah);
        struct ath9k_hw_cal_data *caldata = ah->caldata;
+       struct ath9k_hw_mci *mci_hw = &ah->btcoex_hw.mci;
        bool txiqcal_done = false, txclcal_done = false;
        bool is_reusable = true, status = true;
        bool run_rtt_cal = false, run_agc_cal;
        bool rtt = !!(ah->caps.hw_caps & ATH9K_HW_CAP_RTT);
+       bool mci = !!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI);
        u32 agc_ctrl = 0, agc_supp_cals = AR_PHY_AGC_CONTROL_OFFSET_CAL |
                                          AR_PHY_AGC_CONTROL_FLTR_CAL   |
                                          AR_PHY_AGC_CONTROL_PKDET_CAL;
@@ -1005,6 +1008,31 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah,
        } else if (caldata && !caldata->done_txiqcal_once)
                run_agc_cal = true;
 
+       if (mci && IS_CHAN_2GHZ(chan) &&
+           (mci_hw->bt_state  == MCI_BT_AWAKE) &&
+           run_agc_cal &&
+           !(mci_hw->config & ATH_MCI_CONFIG_DISABLE_MCI_CAL)) {
+
+               u32 pld[4] = {0, 0, 0, 0};
+
+               /* send CAL_REQ only when BT is AWAKE. */
+               ath_dbg(common, ATH_DBG_MCI, "MCI send WLAN_CAL_REQ 0x%x\n",
+                       mci_hw->wlan_cal_seq);
+               MCI_GPM_SET_CAL_TYPE(pld, MCI_GPM_WLAN_CAL_REQ);
+               pld[MCI_GPM_WLAN_CAL_W_SEQUENCE] = mci_hw->wlan_cal_seq++;
+               ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16, true, false);
+
+               /* Wait BT_CAL_GRANT for 50ms */
+               ath_dbg(common, ATH_DBG_MCI, "MCI wait for BT_CAL_GRANT");
+
+               if (ar9003_mci_wait_for_gpm(ah, MCI_GPM_BT_CAL_GRANT, 0, 50000))
+                       ath_dbg(common, ATH_DBG_MCI, "MCI got BT_CAL_GRANT");
+               else {
+                       is_reusable = false;
+                       ath_dbg(common, ATH_DBG_MCI, "\nMCI BT is not responding");
+               }
+       }
+
        txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
        REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
        udelay(5);
@@ -1022,6 +1050,21 @@ skip_tx_iqcal:
                                       AR_PHY_AGC_CONTROL_CAL,
                                       0, AH_WAIT_TIMEOUT);
        }
+
+       if (mci && IS_CHAN_2GHZ(chan) &&
+           (mci_hw->bt_state  == MCI_BT_AWAKE) &&
+           run_agc_cal &&
+           !(mci_hw->config & ATH_MCI_CONFIG_DISABLE_MCI_CAL)) {
+
+               u32 pld[4] = {0, 0, 0, 0};
+
+               ath_dbg(common, ATH_DBG_MCI, "MCI Send WLAN_CAL_DONE 0x%x\n",
+                       mci_hw->wlan_cal_done);
+               MCI_GPM_SET_CAL_TYPE(pld, MCI_GPM_WLAN_CAL_DONE);
+               pld[MCI_GPM_WLAN_CAL_W_SEQUENCE] = mci_hw->wlan_cal_done++;
+               ar9003_mci_send_message(ah, MCI_GPM, 0, pld, 16, true, false);
+       }
+
        if (rtt && !run_rtt_cal) {
                agc_ctrl |= agc_supp_cals;
                REG_WRITE(ah, AR_PHY_AGC_CONTROL, agc_ctrl);