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 * $FreeBSD$
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 */
38void
39ar5416AdcGainCalCollect(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 */
68void
69ar5416AdcGainCalibration(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