| 1 | /* |
| 2 | * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting |
| 3 | * Copyright (c) 2002-2008 Atheros Communications, Inc. |
| 4 | * |
| 5 | * Permission to use, copy, modify, and/or distribute this software for any |
| 6 | * purpose with or without fee is hereby granted, provided that the above |
| 7 | * copyright notice and this permission notice appear in all copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 16 | * |
| 17 | * $Id: ar5416_cal_adcgain.c,v 1.1.1.1 2008/12/11 04:46:48 alc Exp $ |
| 18 | */ |
| 19 | #include "opt_ah.h" |
| 20 | |
| 21 | #include "ah.h" |
| 22 | #include "ah_internal.h" |
| 23 | #include "ah_devid.h" |
| 24 | |
| 25 | #include "ar5416/ar5416.h" |
| 26 | #include "ar5416/ar5416reg.h" |
| 27 | #include "ar5416/ar5416phy.h" |
| 28 | |
| 29 | /* Adc Gain Cal aliases */ |
| 30 | #define totalAdcIOddPhase(i) caldata[0][i].u |
| 31 | #define totalAdcIEvenPhase(i) caldata[1][i].u |
| 32 | #define totalAdcQOddPhase(i) caldata[2][i].u |
| 33 | #define totalAdcQEvenPhase(i) caldata[3][i].u |
| 34 | |
| 35 | /* |
| 36 | * Collect data from HW to later perform ADC Gain Calibration |
| 37 | */ |
| 38 | void |
| 39 | ar5416AdcGainCalCollect(struct ath_hal *ah) |
| 40 | { |
| 41 | struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; |
| 42 | int i; |
| 43 | |
| 44 | /* |
| 45 | * Accumulate ADC Gain cal measures for active chains |
| 46 | */ |
| 47 | for (i = 0; i < AR5416_MAX_CHAINS; i++) { |
| 48 | cal->totalAdcIOddPhase(i) += |
| 49 | OS_REG_READ(ah, AR_PHY_CAL_MEAS_0(i)); |
| 50 | cal->totalAdcIEvenPhase(i) += |
| 51 | OS_REG_READ(ah, AR_PHY_CAL_MEAS_1(i)); |
| 52 | cal->totalAdcQOddPhase(i) += |
| 53 | OS_REG_READ(ah, AR_PHY_CAL_MEAS_2(i)); |
| 54 | cal->totalAdcQEvenPhase(i) += |
| 55 | OS_REG_READ(ah, AR_PHY_CAL_MEAS_3(i)); |
| 56 | |
| 57 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 58 | "%d: Chn %d oddi=0x%08x; eveni=0x%08x; oddq=0x%08x; evenq=0x%08x;\n" , |
| 59 | cal->calSamples, i, cal->totalAdcIOddPhase(i), |
| 60 | cal->totalAdcIEvenPhase(i), cal->totalAdcQOddPhase(i), |
| 61 | cal->totalAdcQEvenPhase(i)); |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | /* |
| 66 | * Use HW data to do ADC Gain Calibration |
| 67 | */ |
| 68 | void |
| 69 | ar5416AdcGainCalibration(struct ath_hal *ah, uint8_t numChains) |
| 70 | { |
| 71 | struct ar5416PerCal *cal = &AH5416(ah)->ah_cal; |
| 72 | uint32_t i; |
| 73 | |
| 74 | for (i = 0; i < numChains; i++) { |
| 75 | uint32_t iOddMeasOffset = cal->totalAdcIOddPhase(i); |
| 76 | uint32_t iEvenMeasOffset = cal->totalAdcIEvenPhase(i); |
| 77 | uint32_t qOddMeasOffset = cal->totalAdcQOddPhase(i); |
| 78 | uint32_t qEvenMeasOffset = cal->totalAdcQEvenPhase(i); |
| 79 | |
| 80 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 81 | "Start ADC Gain Cal for Chain %d\n" , i); |
| 82 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 83 | " pwr_meas_odd_i = 0x%08x\n" , iOddMeasOffset); |
| 84 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 85 | " pwr_meas_even_i = 0x%08x\n" , iEvenMeasOffset); |
| 86 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 87 | " pwr_meas_odd_q = 0x%08x\n" , qOddMeasOffset); |
| 88 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 89 | " pwr_meas_even_q = 0x%08x\n" , qEvenMeasOffset); |
| 90 | |
| 91 | if (iOddMeasOffset != 0 && qEvenMeasOffset != 0) { |
| 92 | uint32_t iGainMismatch = |
| 93 | ((iEvenMeasOffset*32)/iOddMeasOffset) & 0x3f; |
| 94 | uint32_t qGainMismatch = |
| 95 | ((qOddMeasOffset*32)/qEvenMeasOffset) & 0x3f; |
| 96 | uint32_t val; |
| 97 | |
| 98 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 99 | " gain_mismatch_i = 0x%08x\n" , |
| 100 | iGainMismatch); |
| 101 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 102 | " gain_mismatch_q = 0x%08x\n" , |
| 103 | qGainMismatch); |
| 104 | |
| 105 | val = OS_REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i)); |
| 106 | val &= 0xfffff000; |
| 107 | val |= (qGainMismatch) | (iGainMismatch << 6); |
| 108 | OS_REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i), val); |
| 109 | |
| 110 | HALDEBUG(ah, HAL_DEBUG_PERCAL, |
| 111 | "ADC Gain Cal done for Chain %d\n" , i); |
| 112 | } |
| 113 | } |
| 114 | OS_REG_SET_BIT(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0), |
| 115 | AR_PHY_NEW_ADC_GAIN_CORR_ENABLE); |
| 116 | } |
| 117 | |