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 | |