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
ar5416AdcGainCalCollect(struct ath_hal * ah)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
ar5416AdcGainCalibration(struct ath_hal * ah,uint8_t numChains)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