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Commit 3ebfcdc4 authored by Mohammed Shafi Shajakhan's avatar Mohammed Shafi Shajakhan Committed by John W. Linville
Browse files

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: default avatarRajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: default avatarMohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 7a9233ff

drivers/net/wireless/ath/ath9k/ar9003_calib.c

+43 −0
Original line number Diff line number Diff line
@@ -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 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah, 
				       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);