package/kernel/mac80211/patches/328-ath9k_hw-implement-temperature-compensation-support-.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Mon, 11 Jul 2016 11:35:55 +0200
   3 Subject: [PATCH] ath9k_hw: implement temperature compensation support for
   4  AR9003+
   5
   6 Signed-off-by: Felix Fietkau <nbd@nbd.name>
   7 ---
   8
   9 --- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
  10 +++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
  11 @@ -33,6 +33,7 @@ struct coeff {
  12
  13  enum ar9003_cal_types {
  14         IQ_MISMATCH_CAL = BIT(0),
  15 +       TEMP_COMP_CAL = BIT(1),
  16  };
  17
  18  static void ar9003_hw_setup_calibration(struct ath_hw *ah,
  19 @@ -58,6 +59,12 @@ static void ar9003_hw_setup_calibration(
  20                 /* Kick-off cal */
  21                 REG_SET_BIT(ah, AR_PHY_TIMING4, AR_PHY_TIMING4_DO_CAL);
  22                 break;
  23 +       case TEMP_COMP_CAL:
  24 +               ath_dbg(common, CALIBRATE,
  25 +                       "starting Temperature Compensation Calibration\n");
  26 +               REG_SET_BIT(ah, AR_CH0_THERM, AR_CH0_THERM_LOCAL);
  27 +               REG_SET_BIT(ah, AR_CH0_THERM, AR_CH0_THERM_START);
  28 +               break;
  29         default:
  30                 ath_err(common, "Invalid calibration type\n");
  31                 break;
  32 @@ -86,7 +93,8 @@ static bool ar9003_hw_per_calibration(st
  33                 /*
  34                 * Accumulate cal measures for active chains
  35                 */
  36 -               cur_caldata->calCollect(ah);
  37 +               if (cur_caldata->calCollect)
  38 +                       cur_caldata->calCollect(ah);
  39                 ah->cal_samples++;
  40
  41                 if (ah->cal_samples >= cur_caldata->calNumSamples) {
  42 @@ -99,7 +107,8 @@ static bool ar9003_hw_per_calibration(st
  43                         /*
  44                         * Process accumulated data
  45                         */
  46 -                       cur_caldata->calPostProc(ah, numChains);
  47 +                       if (cur_caldata->calPostProc)
  48 +                               cur_caldata->calPostProc(ah, numChains);
  49
  50                         /* Calibration has finished. */
  51                         caldata->CalValid |= cur_caldata->calType;
  52 @@ -314,9 +323,16 @@ static const struct ath9k_percal_data iq
  53         ar9003_hw_iqcalibrate
  54  };
  55
  56 +static const struct ath9k_percal_data temp_cal_single_sample = {
  57 +       TEMP_COMP_CAL,
  58 +       MIN_CAL_SAMPLES,
  59 +       PER_MAX_LOG_COUNT,
  60 +};
  61 +
  62  static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
  63  {
  64         ah->iq_caldata.calData = &iq_cal_single_sample;
  65 +       ah->temp_caldata.calData = &temp_cal_single_sample;
  66
  67         if (AR_SREV_9300_20_OR_LATER(ah)) {
  68                 ah->enabled_cals |= TX_IQ_CAL;
  69 @@ -324,7 +340,7 @@ static void ar9003_hw_init_cal_settings(
  70                         ah->enabled_cals |= TX_IQ_ON_AGC_CAL;
  71         }
  72
  73 -       ah->supp_cals = IQ_MISMATCH_CAL;
  74 +       ah->supp_cals = IQ_MISMATCH_CAL | TEMP_COMP_CAL;
  75  }
  76
  77  #define OFF_UPPER_LT 24
  78 @@ -1383,6 +1399,9 @@ static void ar9003_hw_init_cal_common(st
  79         INIT_CAL(&ah->iq_caldata);
  80         INSERT_CAL(ah, &ah->iq_caldata);
  81
  82 +       INIT_CAL(&ah->temp_caldata);
  83 +       INSERT_CAL(ah, &ah->temp_caldata);
  84 +
  85         /* Initialize current pointer to first element in list */
  86         ah->cal_list_curr = ah->cal_list;
  87
  88 --- a/drivers/net/wireless/ath/ath9k/hw.h
  89 +++ b/drivers/net/wireless/ath/ath9k/hw.h
  90 @@ -830,6 +830,7 @@ struct ath_hw {
  91         /* Calibration */
  92         u32 supp_cals;
  93         struct ath9k_cal_list iq_caldata;
  94 +       struct ath9k_cal_list temp_caldata;
  95         struct ath9k_cal_list adcgain_caldata;
  96         struct ath9k_cal_list adcdc_caldata;
  97         struct ath9k_cal_list *cal_list;