909155a389
with these ADC DC Gain/Offset calibrations. The whole idea is to calibrate a pair of ADCs to compensate for any differences between them. The AR5416 returns lots of garbage, so there's no need to do the calibration there. The AR9160 returns 0 for secondary ADCs when calibrating 2.4ghz 20mhz modes. It returns valid data for the secondary ADCs when calibrating 2.4ghz HT/40 and any 5ghz mode.
697 lines
20 KiB
C
697 lines
20 KiB
C
/*
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* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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* Copyright (c) 2002-2008 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* $FreeBSD$
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*/
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#include "opt_ah.h"
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#include "ah.h"
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#include "ah_internal.h"
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#include "ah_devid.h"
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#include "ah_eeprom_v14.h"
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#include "ar5212/ar5212.h" /* for NF cal related declarations */
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#include "ar5416/ar5416.h"
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#include "ar5416/ar5416reg.h"
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#include "ar5416/ar5416phy.h"
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/* Owl specific stuff */
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#define NUM_NOISEFLOOR_READINGS 6 /* 3 chains * (ctl + ext) */
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static void ar5416StartNFCal(struct ath_hal *ah);
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static void ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *);
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static int16_t ar5416GetNf(struct ath_hal *, struct ieee80211_channel *);
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/*
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* Determine if calibration is supported by device and channel flags
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*/
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/*
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* ADC GAIN/DC offset calibration is for calibrating two ADCs that
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* are acting as one by interleaving incoming symbols. This isn't
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* relevant for 2.4GHz 20MHz wide modes because, as far as I can tell,
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* the secondary ADC is never enabled. It is enabled however for
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* 5GHz modes.
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*
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* It hasn't been confirmed whether doing this calibration is needed
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* at all in the above modes and/or whether it's actually harmful.
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* So for now, let's leave it enabled and just remember to get
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* confirmation that it needs to be clarified.
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*
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* See US Patent No: US 7,541,952 B1:
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* " Method and Apparatus for Offset and Gain Compensation for
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* Analog-to-Digital Converters."
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*/
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static OS_INLINE HAL_BOOL
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ar5416IsCalSupp(struct ath_hal *ah, const struct ieee80211_channel *chan,
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HAL_CAL_TYPE calType)
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{
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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switch (calType & cal->suppCals) {
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case IQ_MISMATCH_CAL:
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/* Run IQ Mismatch for non-CCK only */
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return !IEEE80211_IS_CHAN_B(chan);
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case ADC_GAIN_CAL:
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case ADC_DC_CAL:
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/* Run ADC Gain Cal for non-CCK & non 2GHz-HT20 only */
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return !IEEE80211_IS_CHAN_B(chan) &&
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!(IEEE80211_IS_CHAN_2GHZ(chan) && IEEE80211_IS_CHAN_HT20(chan));
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}
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return AH_FALSE;
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}
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/*
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* Setup HW to collect samples used for current cal
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*/
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static void
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ar5416SetupMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal)
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{
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/* Start calibration w/ 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples */
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OS_REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4,
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AR_PHY_TIMING_CTRL4_IQCAL_LOG_COUNT_MAX,
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currCal->calData->calCountMax);
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/* Select calibration to run */
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switch (currCal->calData->calType) {
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case IQ_MISMATCH_CAL:
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OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: start IQ Mismatch calibration\n", __func__);
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break;
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case ADC_GAIN_CAL:
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OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_GAIN);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: start ADC Gain calibration\n", __func__);
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break;
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case ADC_DC_CAL:
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OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_PER);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: start ADC DC calibration\n", __func__);
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break;
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case ADC_DC_INIT_CAL:
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OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_INIT);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: start Init ADC DC calibration\n", __func__);
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break;
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}
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/* Kick-off cal */
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OS_REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL);
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}
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/*
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* Initialize shared data structures and prepare a cal to be run.
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*/
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static void
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ar5416ResetMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal)
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{
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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/* Reset data structures shared between different calibrations */
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OS_MEMZERO(cal->caldata, sizeof(cal->caldata));
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cal->calSamples = 0;
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/* Setup HW for new calibration */
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ar5416SetupMeasurement(ah, currCal);
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/* Change SW state to RUNNING for this calibration */
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currCal->calState = CAL_RUNNING;
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}
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#if 0
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/*
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* Run non-periodic calibrations.
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*/
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static HAL_BOOL
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ar5416RunInitCals(struct ath_hal *ah, int init_cal_count)
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{
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struct ath_hal_5416 *ahp = AH5416(ah);
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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HAL_CHANNEL_INTERNAL ichan; /* XXX bogus */
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HAL_CAL_LIST *curCal = ahp->ah_cal_curr;
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HAL_BOOL isCalDone;
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int i;
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if (curCal == AH_NULL)
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return AH_FALSE;
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ichan.calValid = 0;
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for (i = 0; i < init_cal_count; i++) {
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/* Reset this Cal */
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ar5416ResetMeasurement(ah, curCal);
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/* Poll for offset calibration complete */
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if (!ath_hal_wait(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL, 0)) {
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: Cal %d failed to finish in 100ms.\n",
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__func__, curCal->calData->calType);
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/* Re-initialize list pointers for periodic cals */
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cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL;
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return AH_FALSE;
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}
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/* Run this cal */
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ar5416DoCalibration(ah, &ichan, ahp->ah_rxchainmask,
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curCal, &isCalDone);
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if (!isCalDone)
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: init cal %d did not complete.\n",
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__func__, curCal->calData->calType);
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if (curCal->calNext != AH_NULL)
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curCal = curCal->calNext;
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}
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/* Re-initialize list pointers for periodic cals */
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cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL;
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return AH_TRUE;
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}
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#endif
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/*
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* Initialize Calibration infrastructure.
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*/
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HAL_BOOL
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ar5416InitCal(struct ath_hal *ah, const struct ieee80211_channel *chan)
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{
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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HAL_CHANNEL_INTERNAL *ichan;
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ichan = ath_hal_checkchannel(ah, chan);
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HALASSERT(ichan != AH_NULL);
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if (AR_SREV_MERLIN_10_OR_LATER(ah)) {
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/* Enable Rx Filter Cal */
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OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
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OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
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AR_PHY_AGC_CONTROL_FLTR_CAL);
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/* Clear the carrier leak cal bit */
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OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
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/* kick off the cal */
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OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL);
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/* Poll for offset calibration complete */
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if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) {
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: offset calibration failed to complete in 1ms; "
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"noisy environment?\n", __func__);
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return AH_FALSE;
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}
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/* Set the cl cal bit and rerun the cal a 2nd time */
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/* Enable Rx Filter Cal */
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OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
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OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
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AR_PHY_AGC_CONTROL_FLTR_CAL);
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OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
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}
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/* Calibrate the AGC */
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OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL);
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/* Poll for offset calibration complete */
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if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) {
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: offset calibration did not complete in 1ms; "
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"noisy environment?\n", __func__);
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return AH_FALSE;
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}
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/*
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* Do NF calibration after DC offset and other CALs.
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* Per system engineers, noise floor value can sometimes be 20 dB
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* higher than normal value if DC offset and noise floor cal are
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* triggered at the same time.
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*/
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/* XXX this actually kicks off a NF calibration -adrian */
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OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
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/*
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* Try to make sure the above NF cal completes, just so
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* it doesn't clash with subsequent percals -adrian
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*/
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if (! ar5212WaitNFCalComplete(ah, 10000)) {
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HALDEBUG(ah, HAL_DEBUG_ANY, "%s: initial NF calibration did "
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"not complete in time; noisy environment?\n", __func__);
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return AH_FALSE;
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}
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/* Initialize list pointers */
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cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL;
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/*
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* Enable IQ, ADC Gain, ADC DC Offset Cals
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*/
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if (AR_SREV_SOWL_10_OR_LATER(ah)) {
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/* Setup all non-periodic, init time only calibrations */
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/* XXX: Init DC Offset not working yet */
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#if 0
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if (ar5416IsCalSupp(ah, chan, ADC_DC_INIT_CAL)) {
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INIT_CAL(&cal->adcDcCalInitData);
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INSERT_CAL(cal, &cal->adcDcCalInitData);
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}
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/* Initialize current pointer to first element in list */
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cal->cal_curr = cal->cal_list;
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if (cal->ah_cal_curr != AH_NULL && !ar5416RunInitCals(ah, 0))
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return AH_FALSE;
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#endif
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}
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/* If Cals are supported, add them to list via INIT/INSERT_CAL */
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if (ar5416IsCalSupp(ah, chan, ADC_GAIN_CAL)) {
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INIT_CAL(&cal->adcGainCalData);
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INSERT_CAL(cal, &cal->adcGainCalData);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: enable ADC Gain Calibration.\n", __func__);
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}
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if (ar5416IsCalSupp(ah, chan, ADC_DC_CAL)) {
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INIT_CAL(&cal->adcDcCalData);
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INSERT_CAL(cal, &cal->adcDcCalData);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: enable ADC DC Calibration.\n", __func__);
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}
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if (ar5416IsCalSupp(ah, chan, IQ_MISMATCH_CAL)) {
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INIT_CAL(&cal->iqCalData);
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INSERT_CAL(cal, &cal->iqCalData);
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: enable IQ Calibration.\n", __func__);
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}
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/* Initialize current pointer to first element in list */
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cal->cal_curr = cal->cal_list;
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/* Kick off measurements for the first cal */
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if (cal->cal_curr != AH_NULL)
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ar5416ResetMeasurement(ah, cal->cal_curr);
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/* Mark all calibrations on this channel as being invalid */
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ichan->calValid = 0;
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return AH_TRUE;
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}
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/*
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* Entry point for upper layers to restart current cal.
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* Reset the calibration valid bit in channel.
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*/
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HAL_BOOL
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ar5416ResetCalValid(struct ath_hal *ah, const struct ieee80211_channel *chan)
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{
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan);
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HAL_CAL_LIST *currCal = cal->cal_curr;
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if (!AR_SREV_SOWL_10_OR_LATER(ah))
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return AH_FALSE;
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if (currCal == AH_NULL)
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return AH_FALSE;
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if (ichan == AH_NULL) {
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: invalid channel %u/0x%x; no mapping\n",
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__func__, chan->ic_freq, chan->ic_flags);
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return AH_FALSE;
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}
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/*
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* Expected that this calibration has run before, post-reset.
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* Current state should be done
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*/
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if (currCal->calState != CAL_DONE) {
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: Calibration state incorrect, %d\n",
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__func__, currCal->calState);
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return AH_FALSE;
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}
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/* Verify Cal is supported on this channel */
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if (!ar5416IsCalSupp(ah, chan, currCal->calData->calType))
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return AH_FALSE;
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: Resetting Cal %d state for channel %u/0x%x\n",
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__func__, currCal->calData->calType, chan->ic_freq,
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chan->ic_flags);
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/* Disable cal validity in channel */
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ichan->calValid &= ~currCal->calData->calType;
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currCal->calState = CAL_WAITING;
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return AH_TRUE;
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}
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/*
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* Recalibrate the lower PHY chips to account for temperature/environment
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* changes.
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*/
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static void
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ar5416DoCalibration(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *ichan,
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uint8_t rxchainmask, HAL_CAL_LIST *currCal, HAL_BOOL *isCalDone)
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{
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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/* Cal is assumed not done until explicitly set below */
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*isCalDone = AH_FALSE;
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: %s Calibration, state %d, calValid 0x%x\n",
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__func__, currCal->calData->calName, currCal->calState,
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ichan->calValid);
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/* Calibration in progress. */
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if (currCal->calState == CAL_RUNNING) {
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/* Check to see if it has finished. */
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if (!(OS_REG_READ(ah, AR_PHY_TIMING_CTRL4) & AR_PHY_TIMING_CTRL4_DO_CAL)) {
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HALDEBUG(ah, HAL_DEBUG_PERCAL,
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"%s: sample %d of %d finished\n",
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__func__, cal->calSamples,
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currCal->calData->calNumSamples);
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/*
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* Collect measurements for active chains.
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*/
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currCal->calData->calCollect(ah);
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if (++cal->calSamples >= currCal->calData->calNumSamples) {
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int i, numChains = 0;
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for (i = 0; i < AR5416_MAX_CHAINS; i++) {
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if (rxchainmask & (1 << i))
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numChains++;
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}
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/*
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* Process accumulated data
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*/
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currCal->calData->calPostProc(ah, numChains);
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/* Calibration has finished. */
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ichan->calValid |= currCal->calData->calType;
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currCal->calState = CAL_DONE;
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*isCalDone = AH_TRUE;
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} else {
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/*
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* Set-up to collect of another sub-sample.
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*/
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ar5416SetupMeasurement(ah, currCal);
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}
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}
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} else if (!(ichan->calValid & currCal->calData->calType)) {
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/* If current cal is marked invalid in channel, kick it off */
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ar5416ResetMeasurement(ah, currCal);
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}
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}
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/*
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* Internal interface to schedule periodic calibration work.
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*/
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HAL_BOOL
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ar5416PerCalibrationN(struct ath_hal *ah, struct ieee80211_channel *chan,
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u_int rxchainmask, HAL_BOOL longcal, HAL_BOOL *isCalDone)
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{
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struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
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HAL_CAL_LIST *currCal = cal->cal_curr;
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HAL_CHANNEL_INTERNAL *ichan;
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OS_MARK(ah, AH_MARK_PERCAL, chan->ic_freq);
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*isCalDone = AH_TRUE;
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/*
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* Since ath_hal calls the PerCal method with rxchainmask=0x1;
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* override it with the current chainmask. The upper levels currently
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* doesn't know about the chainmask.
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*/
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rxchainmask = AH5416(ah)->ah_rx_chainmask;
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/* Invalid channel check */
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ichan = ath_hal_checkchannel(ah, chan);
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if (ichan == AH_NULL) {
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HALDEBUG(ah, HAL_DEBUG_ANY,
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"%s: invalid channel %u/0x%x; no mapping\n",
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__func__, chan->ic_freq, chan->ic_flags);
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return AH_FALSE;
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}
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/*
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* For given calibration:
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* 1. Call generic cal routine
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* 2. When this cal is done (isCalDone) if we have more cals waiting
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* (eg after reset), mask this to upper layers by not propagating
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* isCalDone if it is set to TRUE.
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* Instead, change isCalDone to FALSE and setup the waiting cal(s)
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* to be run.
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*/
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if (currCal != AH_NULL &&
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(currCal->calState == CAL_RUNNING ||
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currCal->calState == CAL_WAITING)) {
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ar5416DoCalibration(ah, ichan, rxchainmask, currCal, isCalDone);
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if (*isCalDone == AH_TRUE) {
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cal->cal_curr = currCal = currCal->calNext;
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if (currCal->calState == CAL_WAITING) {
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*isCalDone = AH_FALSE;
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ar5416ResetMeasurement(ah, currCal);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Do NF cal only at longer intervals */
|
|
if (longcal) {
|
|
/*
|
|
* Get the value from the previous NF cal
|
|
* and update the history buffer.
|
|
*/
|
|
ar5416GetNf(ah, chan);
|
|
|
|
/*
|
|
* Load the NF from history buffer of the current channel.
|
|
* NF is slow time-variant, so it is OK to use a
|
|
* historical value.
|
|
*/
|
|
ar5416LoadNF(ah, AH_PRIVATE(ah)->ah_curchan);
|
|
|
|
/* start NF calibration, without updating BB NF register*/
|
|
ar5416StartNFCal(ah);
|
|
}
|
|
return AH_TRUE;
|
|
}
|
|
|
|
/*
|
|
* Recalibrate the lower PHY chips to account for temperature/environment
|
|
* changes.
|
|
*/
|
|
HAL_BOOL
|
|
ar5416PerCalibration(struct ath_hal *ah, struct ieee80211_channel *chan,
|
|
HAL_BOOL *isIQdone)
|
|
{
|
|
struct ath_hal_5416 *ahp = AH5416(ah);
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
HAL_CAL_LIST *curCal = cal->cal_curr;
|
|
|
|
if (curCal != AH_NULL && curCal->calData->calType == IQ_MISMATCH_CAL) {
|
|
return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask,
|
|
AH_TRUE, isIQdone);
|
|
} else {
|
|
HAL_BOOL isCalDone;
|
|
|
|
*isIQdone = AH_FALSE;
|
|
return ar5416PerCalibrationN(ah, chan, ahp->ah_rx_chainmask,
|
|
AH_TRUE, &isCalDone);
|
|
}
|
|
}
|
|
|
|
static HAL_BOOL
|
|
ar5416GetEepromNoiseFloorThresh(struct ath_hal *ah,
|
|
const struct ieee80211_channel *chan, int16_t *nft)
|
|
{
|
|
if (IEEE80211_IS_CHAN_5GHZ(chan)) {
|
|
ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_5, nft);
|
|
return AH_TRUE;
|
|
}
|
|
if (IEEE80211_IS_CHAN_2GHZ(chan)) {
|
|
ath_hal_eepromGet(ah, AR_EEP_NFTHRESH_2, nft);
|
|
return AH_TRUE;
|
|
}
|
|
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid channel flags 0x%x\n",
|
|
__func__, chan->ic_flags);
|
|
return AH_FALSE;
|
|
}
|
|
|
|
static void
|
|
ar5416StartNFCal(struct ath_hal *ah)
|
|
{
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF);
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
|
|
}
|
|
|
|
static void
|
|
ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *chan)
|
|
{
|
|
static const uint32_t ar5416_cca_regs[] = {
|
|
AR_PHY_CCA,
|
|
AR_PHY_CH1_CCA,
|
|
AR_PHY_CH2_CCA,
|
|
AR_PHY_EXT_CCA,
|
|
AR_PHY_CH1_EXT_CCA,
|
|
AR_PHY_CH2_EXT_CCA
|
|
};
|
|
struct ar5212NfCalHist *h;
|
|
int i;
|
|
int32_t val;
|
|
uint8_t chainmask;
|
|
|
|
/*
|
|
* Force NF calibration for all chains.
|
|
*/
|
|
if (AR_SREV_KITE(ah)) {
|
|
/* Kite has only one chain */
|
|
chainmask = 0x9;
|
|
} else if (AR_SREV_MERLIN(ah)) {
|
|
/* Merlin has only two chains */
|
|
chainmask = 0x1B;
|
|
} else {
|
|
chainmask = 0x3F;
|
|
}
|
|
|
|
/*
|
|
* Write filtered NF values into maxCCApwr register parameter
|
|
* so we can load below.
|
|
*/
|
|
h = AH5416(ah)->ah_cal.nfCalHist;
|
|
for (i = 0; i < AR5416_NUM_NF_READINGS; i ++)
|
|
if (chainmask & (1 << i)) {
|
|
val = OS_REG_READ(ah, ar5416_cca_regs[i]);
|
|
val &= 0xFFFFFE00;
|
|
val |= (((uint32_t)(h[i].privNF) << 1) & 0x1ff);
|
|
OS_REG_WRITE(ah, ar5416_cca_regs[i], val);
|
|
}
|
|
|
|
/* Load software filtered NF value into baseband internal minCCApwr variable. */
|
|
OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_ENABLE_NF);
|
|
OS_REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NO_UPDATE_NF);
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
|
|
|
|
/* Wait for load to complete, should be fast, a few 10s of us. */
|
|
if (! ar5212WaitNFCalComplete(ah, 1000)) {
|
|
/*
|
|
* We timed out waiting for the noisefloor to load, probably due to an
|
|
* in-progress rx. Simply return here and allow the load plenty of time
|
|
* to complete before the next calibration interval. We need to avoid
|
|
* trying to load -50 (which happens below) while the previous load is
|
|
* still in progress as this can cause rx deafness. Instead by returning
|
|
* here, the baseband nf cal will just be capped by our present
|
|
* noisefloor until the next calibration timer.
|
|
*/
|
|
HALDEBUG(ah, HAL_DEBUG_ANY, "Timeout while waiting for nf "
|
|
"to load: AR_PHY_AGC_CONTROL=0x%x\n",
|
|
OS_REG_READ(ah, AR_PHY_AGC_CONTROL));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Restore maxCCAPower register parameter again so that we're not capped
|
|
* by the median we just loaded. This will be initial (and max) value
|
|
* of next noise floor calibration the baseband does.
|
|
*/
|
|
for (i = 0; i < AR5416_NUM_NF_READINGS; i ++)
|
|
if (chainmask & (1 << i)) {
|
|
val = OS_REG_READ(ah, ar5416_cca_regs[i]);
|
|
val &= 0xFFFFFE00;
|
|
val |= (((uint32_t)(-50) << 1) & 0x1ff);
|
|
OS_REG_WRITE(ah, ar5416_cca_regs[i], val);
|
|
}
|
|
}
|
|
|
|
void
|
|
ar5416InitNfHistBuff(struct ar5212NfCalHist *h)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) {
|
|
h[i].currIndex = 0;
|
|
h[i].privNF = AR5416_CCA_MAX_GOOD_VALUE;
|
|
h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX;
|
|
for (j = 0; j < AR512_NF_CAL_HIST_MAX; j ++)
|
|
h[i].nfCalBuffer[j] = AR5416_CCA_MAX_GOOD_VALUE;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Update the noise floor buffer as a ring buffer
|
|
*/
|
|
static void
|
|
ar5416UpdateNFHistBuff(struct ar5212NfCalHist *h, int16_t *nfarray)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < AR5416_NUM_NF_READINGS; i ++) {
|
|
h[i].nfCalBuffer[h[i].currIndex] = nfarray[i];
|
|
|
|
if (++h[i].currIndex >= AR512_NF_CAL_HIST_MAX)
|
|
h[i].currIndex = 0;
|
|
if (h[i].invalidNFcount > 0) {
|
|
if (nfarray[i] < AR5416_CCA_MIN_BAD_VALUE ||
|
|
nfarray[i] > AR5416_CCA_MAX_HIGH_VALUE) {
|
|
h[i].invalidNFcount = AR512_NF_CAL_HIST_MAX;
|
|
} else {
|
|
h[i].invalidNFcount--;
|
|
h[i].privNF = nfarray[i];
|
|
}
|
|
} else {
|
|
h[i].privNF = ar5212GetNfHistMid(h[i].nfCalBuffer);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read the NF and check it against the noise floor threshhold
|
|
*/
|
|
static int16_t
|
|
ar5416GetNf(struct ath_hal *ah, struct ieee80211_channel *chan)
|
|
{
|
|
int16_t nf, nfThresh;
|
|
|
|
if (ar5212IsNFCalInProgress(ah)) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: NF didn't complete in calibration window\n", __func__);
|
|
nf = 0;
|
|
} else {
|
|
/* Finished NF cal, check against threshold */
|
|
int16_t nfarray[NUM_NOISEFLOOR_READINGS] = { 0 };
|
|
HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan);
|
|
|
|
/* TODO - enhance for multiple chains and ext ch */
|
|
ath_hal_getNoiseFloor(ah, nfarray);
|
|
nf = nfarray[0];
|
|
if (ar5416GetEepromNoiseFloorThresh(ah, chan, &nfThresh)) {
|
|
if (nf > nfThresh) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: noise floor failed detected; "
|
|
"detected %d, threshold %d\n", __func__,
|
|
nf, nfThresh);
|
|
/*
|
|
* NB: Don't discriminate 2.4 vs 5Ghz, if this
|
|
* happens it indicates a problem regardless
|
|
* of the band.
|
|
*/
|
|
chan->ic_state |= IEEE80211_CHANSTATE_CWINT;
|
|
nf = 0;
|
|
}
|
|
} else {
|
|
nf = 0;
|
|
}
|
|
ar5416UpdateNFHistBuff(AH5416(ah)->ah_cal.nfCalHist, nfarray);
|
|
ichan->rawNoiseFloor = nf;
|
|
}
|
|
return nf;
|
|
}
|