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 #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