ar5416_cal_adcgain.c

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    1 /*-
    2  * SPDX-License-Identifier: ISC
    3  *
    4  * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
    5  * Copyright (c) 2002-2008 Atheros Communications, Inc.
    6  *
    7  * Permission to use, copy, modify, and/or distribute this software for any
    8  * purpose with or without fee is hereby granted, provided that the above
    9  * copyright notice and this permission notice appear in all copies.
   10  *
   11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   18  *
   19  * $FreeBSD$
   20  */
   21 #include "opt_ah.h"
   22 
   23 #include "ah.h"
   24 #include "ah_internal.h"
   25 #include "ah_devid.h"
   26 
   27 #include "ar5416/ar5416.h"
   28 #include "ar5416/ar5416reg.h"
   29 #include "ar5416/ar5416phy.h"
   30 
   31 /* Adc Gain Cal aliases */
   32 #define totalAdcIOddPhase(i)    caldata[0][i].u
   33 #define totalAdcIEvenPhase(i)   caldata[1][i].u
   34 #define totalAdcQOddPhase(i)    caldata[2][i].u
   35 #define totalAdcQEvenPhase(i)   caldata[3][i].u
   36 
   37 /*
   38  * Collect data from HW to later perform ADC Gain Calibration
   39  */
   40 void
   41 ar5416AdcGainCalCollect(struct ath_hal *ah)
   42 {
   43         struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
   44         int i;
   45 
   46         /*
   47         * Accumulate ADC Gain cal measures for active chains
   48         */
   49         for (i = 0; i < AR5416_MAX_CHAINS; i++) {
   50                 cal->totalAdcIOddPhase(i) +=
   51                     OS_REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
   52                 cal->totalAdcIEvenPhase(i) +=
   53                     OS_REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
   54                 cal->totalAdcQOddPhase(i) +=
   55                     OS_REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
   56                 cal->totalAdcQEvenPhase(i) +=
   57                     OS_REG_READ(ah, AR_PHY_CAL_MEAS_3(i));
   58 
   59                 HALDEBUG(ah, HAL_DEBUG_PERCAL,
   60                     "%d: Chn %d oddi=0x%08x; eveni=0x%08x; oddq=0x%08x; evenq=0x%08x;\n",
   61                     cal->calSamples, i, cal->totalAdcIOddPhase(i),
   62                     cal->totalAdcIEvenPhase(i), cal->totalAdcQOddPhase(i),
   63                     cal->totalAdcQEvenPhase(i));
   64         }
   65 }
   66 
   67 /*
   68  * Use HW data to do ADC Gain Calibration
   69  */
   70 void
   71 ar5416AdcGainCalibration(struct ath_hal *ah, uint8_t numChains)
   72 {
   73         struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
   74         uint32_t i;
   75 
   76         for (i = 0; i < numChains; i++) {
   77                 uint32_t iOddMeasOffset  = cal->totalAdcIOddPhase(i);
   78                 uint32_t iEvenMeasOffset = cal->totalAdcIEvenPhase(i);
   79                 uint32_t qOddMeasOffset  = cal->totalAdcQOddPhase(i);
   80                 uint32_t qEvenMeasOffset = cal->totalAdcQEvenPhase(i);
   81 
   82                 HALDEBUG(ah, HAL_DEBUG_PERCAL,
   83                     "Start ADC Gain Cal for Chain %d\n", i);
   84                 HALDEBUG(ah, HAL_DEBUG_PERCAL,
   85                     "  pwr_meas_odd_i = 0x%08x\n", iOddMeasOffset);
   86                 HALDEBUG(ah, HAL_DEBUG_PERCAL,
   87                     "  pwr_meas_even_i = 0x%08x\n", iEvenMeasOffset);
   88                 HALDEBUG(ah, HAL_DEBUG_PERCAL,
   89                     "  pwr_meas_odd_q = 0x%08x\n", qOddMeasOffset);
   90                 HALDEBUG(ah, HAL_DEBUG_PERCAL,
   91                     "  pwr_meas_even_q = 0x%08x\n", qEvenMeasOffset);
   92 
   93                 if (iOddMeasOffset != 0 && qEvenMeasOffset != 0) {
   94                         uint32_t iGainMismatch =
   95                             ((iEvenMeasOffset*32)/iOddMeasOffset) & 0x3f;
   96                         uint32_t qGainMismatch =
   97                             ((qOddMeasOffset*32)/qEvenMeasOffset) & 0x3f;
   98                         uint32_t val;
   99 
  100                         HALDEBUG(ah, HAL_DEBUG_PERCAL,
  101                             " gain_mismatch_i = 0x%08x\n",
  102                             iGainMismatch);
  103                         HALDEBUG(ah, HAL_DEBUG_PERCAL,
  104                             " gain_mismatch_q = 0x%08x\n",
  105                             qGainMismatch);
  106 
  107                         val = OS_REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i));
  108                         val &= 0xfffff000;
  109                         val |= (qGainMismatch) | (iGainMismatch << 6);
  110                         OS_REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i), val); 
  111 
  112                         HALDEBUG(ah,  HAL_DEBUG_PERCAL,
  113                             "ADC Gain Cal done for Chain %d\n", i);
  114                 }
  115         }
  116         OS_REG_SET_BIT(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0),
  117             AR_PHY_NEW_ADC_GAIN_CORR_ENABLE);
  118 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/ath/ath_hal/ar5416/ar5416_cal_adcgain.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ath/ath_hal/ar5416/ar5416_cal_adcgain.c