ath9k_hw: add the AR9003 ar9003_hw_init_cal callback

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.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 6a7267764ac950f39d5fff45f83c08eeb9401e11..00e4cb8d5f04cf4976aeda0fcc198edad2616244 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -40,9 +40,152 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah,
        return false;
 }
 
+static void ar9003_hw_iqcal_collect(struct ath_hw *ah)
+{
+       int i;
+
+       /* Accumulate IQ cal measures for active chains */
+       for (i = 0; i < AR5416_MAX_CHAINS; i++) {
+               ah->totalPowerMeasI[i] +=
+                       REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
+               ah->totalPowerMeasQ[i] +=
+                       REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
+               ah->totalIqCorrMeas[i] +=
+                       (int32_t) REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
+               ath_print(ath9k_hw_common(ah), ATH_DBG_CALIBRATE,
+                         "%d: Chn %d pmi=0x%08x;pmq=0x%08x;iqcm=0x%08x;\n",
+                         ah->cal_samples, i, ah->totalPowerMeasI[i],
+                         ah->totalPowerMeasQ[i],
+                         ah->totalIqCorrMeas[i]);
+       }
+}
+
+static void ar9003_hw_iqcalibrate(struct ath_hw *ah, u8 numChains)
+{
+       struct ath_common *common = ath9k_hw_common(ah);
+       u32 powerMeasQ, powerMeasI, iqCorrMeas;
+       u32 qCoffDenom, iCoffDenom;
+       int32_t qCoff, iCoff;
+       int iqCorrNeg, i;
+       const u_int32_t offset_array[3] = {
+               AR_PHY_RX_IQCAL_CORR_B0,
+               AR_PHY_RX_IQCAL_CORR_B1,
+               AR_PHY_RX_IQCAL_CORR_B2,
+       };
+
+       for (i = 0; i < numChains; i++) {
+               powerMeasI = ah->totalPowerMeasI[i];
+               powerMeasQ = ah->totalPowerMeasQ[i];
+               iqCorrMeas = ah->totalIqCorrMeas[i];
+
+               ath_print(common, ATH_DBG_CALIBRATE,
+                         "Starting IQ Cal and Correction for Chain %d\n",
+                         i);
+
+               ath_print(common, ATH_DBG_CALIBRATE,
+                         "Orignal: Chn %diq_corr_meas = 0x%08x\n",
+                         i, ah->totalIqCorrMeas[i]);
+
+               iqCorrNeg = 0;
+
+               if (iqCorrMeas > 0x80000000) {
+                       iqCorrMeas = (0xffffffff - iqCorrMeas) + 1;
+                       iqCorrNeg = 1;
+               }
+
+               ath_print(common, ATH_DBG_CALIBRATE,
+                         "Chn %d pwr_meas_i = 0x%08x\n", i, powerMeasI);
+               ath_print(common, ATH_DBG_CALIBRATE,
+                         "Chn %d pwr_meas_q = 0x%08x\n", i, powerMeasQ);
+               ath_print(common, ATH_DBG_CALIBRATE, "iqCorrNeg is 0x%08x\n",
+                         iqCorrNeg);
+
+               iCoffDenom = (powerMeasI / 2 + powerMeasQ / 2) / 256;
+               qCoffDenom = powerMeasQ / 64;
+
+               if ((iCoffDenom != 0) && (qCoffDenom != 0)) {
+                       iCoff = iqCorrMeas / iCoffDenom;
+                       qCoff = powerMeasI / qCoffDenom - 64;
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "Chn %d iCoff = 0x%08x\n", i, iCoff);
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "Chn %d qCoff = 0x%08x\n", i, qCoff);
+
+                       /* Force bounds on iCoff */
+                       if (iCoff >= 63)
+                               iCoff = 63;
+                       else if (iCoff <= -63)
+                               iCoff = -63;
+
+                       /* Negate iCoff if iqCorrNeg == 0 */
+                       if (iqCorrNeg == 0x0)
+                               iCoff = -iCoff;
+
+                       /* Force bounds on qCoff */
+                       if (qCoff >= 63)
+                               qCoff = 63;
+                       else if (qCoff <= -63)
+                               qCoff = -63;
+
+                       iCoff = iCoff & 0x7f;
+                       qCoff = qCoff & 0x7f;
+
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "Chn %d : iCoff = 0x%x  qCoff = 0x%x\n",
+                                 i, iCoff, qCoff);
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "Register offset (0x%04x) "
+                                 "before update = 0x%x\n",
+                                 offset_array[i],
+                                 REG_READ(ah, offset_array[i]));
+
+                       REG_RMW_FIELD(ah, offset_array[i],
+                                     AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
+                                     iCoff);
+                       REG_RMW_FIELD(ah, offset_array[i],
+                                     AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
+                                     qCoff);
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "Register offset (0x%04x) QI COFF "
+                                 "(bitfields 0x%08x) after update = 0x%x\n",
+                                 offset_array[i],
+                                 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_I_COFF,
+                                 REG_READ(ah, offset_array[i]));
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "Register offset (0x%04x) QQ COFF "
+                                 "(bitfields 0x%08x) after update = 0x%x\n",
+                                 offset_array[i],
+                                 AR_PHY_RX_IQCAL_CORR_IQCORR_Q_Q_COFF,
+                                 REG_READ(ah, offset_array[i]));
+
+                       ath_print(common, ATH_DBG_CALIBRATE,
+                                 "IQ Cal and Correction done for Chain %d\n",
+                                 i);
+               }
+       }
+
+       REG_SET_BIT(ah, AR_PHY_RX_IQCAL_CORR_B0,
+                   AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE);
+       ath_print(common, ATH_DBG_CALIBRATE,
+                 "IQ Cal and Correction (offset 0x%04x) enabled "
+                 "(bit position 0x%08x). New Value 0x%08x\n",
+                 (unsigned) (AR_PHY_RX_IQCAL_CORR_B0),
+                 AR_PHY_RX_IQCAL_CORR_IQCORR_ENABLE,
+                 REG_READ(ah, AR_PHY_RX_IQCAL_CORR_B0));
+}
+
+static const struct ath9k_percal_data iq_cal_single_sample = {
+       IQ_MISMATCH_CAL,
+       MIN_CAL_SAMPLES,
+       PER_MAX_LOG_COUNT,
+       ar9003_hw_iqcal_collect,
+       ar9003_hw_iqcalibrate
+};
+
 static void ar9003_hw_init_cal_settings(struct ath_hw *ah)
 {
-       /* TODO */
+       ah->iq_caldata.calData = &iq_cal_single_sample;
+       ah->supp_cals = IQ_MISMATCH_CAL;
 }
 
 static bool ar9003_hw_iscal_supported(struct ath_hw *ah,