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      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_adcdc.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 DC Offset Cal aliases */
     30 #define	totalAdcDcOffsetIOddPhase(i)	caldata[0][i].s
     31 #define	totalAdcDcOffsetIEvenPhase(i)	caldata[1][i].s
     32 #define	totalAdcDcOffsetQOddPhase(i)	caldata[2][i].s
     33 #define	totalAdcDcOffsetQEvenPhase(i)	caldata[3][i].s
     34 
     35 void
     36 ar5416AdcDcCalCollect(struct ath_hal *ah)
     37 {
     38 	struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
     39 	int i;
     40 
     41 	for (i = 0; i < AR5416_MAX_CHAINS; i++) {
     42 		cal->totalAdcDcOffsetIOddPhase(i) += (int32_t)
     43 		    OS_REG_READ(ah, AR_PHY_CAL_MEAS_0(i));
     44 		cal->totalAdcDcOffsetIEvenPhase(i) += (int32_t)
     45 		    OS_REG_READ(ah, AR_PHY_CAL_MEAS_1(i));
     46 		cal->totalAdcDcOffsetQOddPhase(i) += (int32_t)
     47 		    OS_REG_READ(ah, AR_PHY_CAL_MEAS_2(i));
     48 		cal->totalAdcDcOffsetQEvenPhase(i) += (int32_t)
     49 		    OS_REG_READ(ah, AR_PHY_CAL_MEAS_3(i));
     50 
     51 		HALDEBUG(ah, HAL_DEBUG_PERCAL,
     52 		    "%d: Chn %d oddi=0x%08x; eveni=0x%08x; oddq=0x%08x; evenq=0x%08x;\n",
     53 		   cal->calSamples, i,
     54 		   cal->totalAdcDcOffsetIOddPhase(i),
     55 		   cal->totalAdcDcOffsetIEvenPhase(i),
     56 		   cal->totalAdcDcOffsetQOddPhase(i),
     57 		   cal->totalAdcDcOffsetQEvenPhase(i));
     58 	}
     59 }
     60 
     61 void
     62 ar5416AdcDcCalibration(struct ath_hal *ah, uint8_t numChains)
     63 {
     64 	struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
     65 	const HAL_PERCAL_DATA *calData = cal->cal_curr->calData;
     66 	uint32_t numSamples;
     67 	int i;
     68 
     69 	numSamples = (1 << (calData->calCountMax + 5)) * calData->calNumSamples;
     70 	for (i = 0; i < numChains; i++) {
     71 		uint32_t iOddMeasOffset = cal->totalAdcDcOffsetIOddPhase(i);
     72 		uint32_t iEvenMeasOffset = cal->totalAdcDcOffsetIEvenPhase(i);
     73 		int32_t qOddMeasOffset = cal->totalAdcDcOffsetQOddPhase(i);
     74 		int32_t qEvenMeasOffset = cal->totalAdcDcOffsetQEvenPhase(i);
     75 		int32_t qDcMismatch, iDcMismatch;
     76 		uint32_t val;
     77 
     78 		HALDEBUG(ah, HAL_DEBUG_PERCAL,
     79 		    "Starting ADC DC Offset Cal for Chain %d\n", i);
     80 
     81 		HALDEBUG(ah, HAL_DEBUG_PERCAL, " pwr_meas_odd_i = %d\n",
     82 		    iOddMeasOffset);
     83 		HALDEBUG(ah, HAL_DEBUG_PERCAL, " pwr_meas_even_i = %d\n",
     84 		    iEvenMeasOffset);
     85 		HALDEBUG(ah, HAL_DEBUG_PERCAL, " pwr_meas_odd_q = %d\n",
     86 		    qOddMeasOffset);
     87 		HALDEBUG(ah, HAL_DEBUG_PERCAL, " pwr_meas_even_q = %d\n",
     88 		    qEvenMeasOffset);
     89 
     90 		HALASSERT(numSamples);
     91 
     92 		iDcMismatch = (((iEvenMeasOffset - iOddMeasOffset) * 2) /
     93 		    numSamples) & 0x1ff;
     94 		qDcMismatch = (((qOddMeasOffset - qEvenMeasOffset) * 2) /
     95 		    numSamples) & 0x1ff;
     96 		HALDEBUG(ah, HAL_DEBUG_PERCAL,
     97 		    " dc_offset_mismatch_i = 0x%08x\n", iDcMismatch);
     98 		HALDEBUG(ah, HAL_DEBUG_PERCAL,
     99 		    " dc_offset_mismatch_q = 0x%08x\n", qDcMismatch);
    100 
    101 		val = OS_REG_READ(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i));
    102 		val &= 0xc0000fff;
    103 		val |= (qDcMismatch << 12) | (iDcMismatch << 21);
    104 		OS_REG_WRITE(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(i), val);
    105 
    106 		HALDEBUG(ah, HAL_DEBUG_PERCAL,
    107 		    "ADC DC Offset Cal done for Chain %d\n", i);
    108 	}
    109 	OS_REG_SET_BIT(ah, AR_PHY_NEW_ADC_DC_GAIN_CORR(0),
    110 	    AR_PHY_NEW_ADC_DC_OFFSET_CORR_ENABLE);
    111 }
    112