651 lines
18 KiB
C
651 lines
18 KiB
C
/*
|
|
* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
|
|
* Copyright (c) 2002-2008 Atheros Communications, Inc.
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
#include "opt_ah.h"
|
|
|
|
#include "ah.h"
|
|
#include "ah_internal.h"
|
|
#include "ah_devid.h"
|
|
|
|
#include "ah_eeprom_v14.h"
|
|
|
|
#include "ar5416/ar5416.h"
|
|
#include "ar5416/ar5416reg.h"
|
|
#include "ar5416/ar5416phy.h"
|
|
|
|
/* Owl specific stuff */
|
|
#define NUM_NOISEFLOOR_READINGS 6 /* 3 chains * (ctl + ext) */
|
|
|
|
static void ar5416StartNFCal(struct ath_hal *ah);
|
|
static void ar5416LoadNF(struct ath_hal *ah, const struct ieee80211_channel *);
|
|
static int16_t ar5416GetNf(struct ath_hal *, struct ieee80211_channel *);
|
|
|
|
/*
|
|
* Determine if calibration is supported by device and channel flags
|
|
*/
|
|
static OS_INLINE HAL_BOOL
|
|
ar5416IsCalSupp(struct ath_hal *ah, const struct ieee80211_channel *chan,
|
|
HAL_CAL_TYPE calType)
|
|
{
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
|
|
switch (calType & cal->suppCals) {
|
|
case IQ_MISMATCH_CAL:
|
|
/* Run IQ Mismatch for non-CCK only */
|
|
return !IEEE80211_IS_CHAN_B(chan);
|
|
case ADC_GAIN_CAL:
|
|
case ADC_DC_CAL:
|
|
/* Run ADC Gain Cal for non-CCK & non 2GHz-HT20 only */
|
|
return !IEEE80211_IS_CHAN_B(chan) &&
|
|
!(IEEE80211_IS_CHAN_2GHZ(chan) && IEEE80211_IS_CHAN_HT20(chan));
|
|
}
|
|
return AH_FALSE;
|
|
}
|
|
|
|
/*
|
|
* Setup HW to collect samples used for current cal
|
|
*/
|
|
static void
|
|
ar5416SetupMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal)
|
|
{
|
|
/* Start calibration w/ 2^(INIT_IQCAL_LOG_COUNT_MAX+1) samples */
|
|
OS_REG_RMW_FIELD(ah, AR_PHY_TIMING_CTRL4,
|
|
AR_PHY_TIMING_CTRL4_IQCAL_LOG_COUNT_MAX,
|
|
currCal->calData->calCountMax);
|
|
|
|
/* Select calibration to run */
|
|
switch (currCal->calData->calType) {
|
|
case IQ_MISMATCH_CAL:
|
|
OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_IQ);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: start IQ Mismatch calibration\n", __func__);
|
|
break;
|
|
case ADC_GAIN_CAL:
|
|
OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_GAIN);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: start ADC Gain calibration\n", __func__);
|
|
break;
|
|
case ADC_DC_CAL:
|
|
OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_PER);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: start ADC DC calibration\n", __func__);
|
|
break;
|
|
case ADC_DC_INIT_CAL:
|
|
OS_REG_WRITE(ah, AR_PHY_CALMODE, AR_PHY_CALMODE_ADC_DC_INIT);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: start Init ADC DC calibration\n", __func__);
|
|
break;
|
|
}
|
|
/* Kick-off cal */
|
|
OS_REG_SET_BIT(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL);
|
|
}
|
|
|
|
/*
|
|
* Initialize shared data structures and prepare a cal to be run.
|
|
*/
|
|
static void
|
|
ar5416ResetMeasurement(struct ath_hal *ah, HAL_CAL_LIST *currCal)
|
|
{
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
|
|
/* Reset data structures shared between different calibrations */
|
|
OS_MEMZERO(cal->caldata, sizeof(cal->caldata));
|
|
cal->calSamples = 0;
|
|
|
|
/* Setup HW for new calibration */
|
|
ar5416SetupMeasurement(ah, currCal);
|
|
|
|
/* Change SW state to RUNNING for this calibration */
|
|
currCal->calState = CAL_RUNNING;
|
|
}
|
|
|
|
#if 0
|
|
/*
|
|
* Run non-periodic calibrations.
|
|
*/
|
|
static HAL_BOOL
|
|
ar5416RunInitCals(struct ath_hal *ah, int init_cal_count)
|
|
{
|
|
struct ath_hal_5416 *ahp = AH5416(ah);
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
HAL_CHANNEL_INTERNAL ichan; /* XXX bogus */
|
|
HAL_CAL_LIST *curCal = ahp->ah_cal_curr;
|
|
HAL_BOOL isCalDone;
|
|
int i;
|
|
|
|
if (curCal == AH_NULL)
|
|
return AH_FALSE;
|
|
|
|
ichan.calValid = 0;
|
|
for (i = 0; i < init_cal_count; i++) {
|
|
/* Reset this Cal */
|
|
ar5416ResetMeasurement(ah, curCal);
|
|
/* Poll for offset calibration complete */
|
|
if (!ath_hal_wait(ah, AR_PHY_TIMING_CTRL4, AR_PHY_TIMING_CTRL4_DO_CAL, 0)) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: Cal %d failed to finish in 100ms.\n",
|
|
__func__, curCal->calData->calType);
|
|
/* Re-initialize list pointers for periodic cals */
|
|
cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL;
|
|
return AH_FALSE;
|
|
}
|
|
/* Run this cal */
|
|
ar5416DoCalibration(ah, &ichan, ahp->ah_rxchainmask,
|
|
curCal, &isCalDone);
|
|
if (!isCalDone)
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: init cal %d did not complete.\n",
|
|
__func__, curCal->calData->calType);
|
|
if (curCal->calNext != AH_NULL)
|
|
curCal = curCal->calNext;
|
|
}
|
|
|
|
/* Re-initialize list pointers for periodic cals */
|
|
cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL;
|
|
return AH_TRUE;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Initialize Calibration infrastructure.
|
|
*/
|
|
HAL_BOOL
|
|
ar5416InitCal(struct ath_hal *ah, const struct ieee80211_channel *chan)
|
|
{
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
HAL_CHANNEL_INTERNAL *ichan;
|
|
|
|
ichan = ath_hal_checkchannel(ah, chan);
|
|
HALASSERT(ichan != AH_NULL);
|
|
|
|
if (AR_SREV_MERLIN_10_OR_LATER(ah)) {
|
|
/* Enable Rx Filter Cal */
|
|
OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
|
|
AR_PHY_AGC_CONTROL_FLTR_CAL);
|
|
|
|
/* Clear the carrier leak cal bit */
|
|
OS_REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
|
|
|
|
/* kick off the cal */
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL);
|
|
|
|
/* Poll for offset calibration complete */
|
|
if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: offset calibration failed to complete in 1ms; "
|
|
"noisy environment?\n", __func__);
|
|
return AH_FALSE;
|
|
}
|
|
|
|
/* Set the cl cal bit and rerun the cal a 2nd time */
|
|
/* Enable Rx Filter Cal */
|
|
OS_REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
|
|
AR_PHY_AGC_CONTROL_FLTR_CAL);
|
|
|
|
OS_REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
|
|
}
|
|
|
|
/* Calibrate the AGC */
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL);
|
|
|
|
/* Poll for offset calibration complete */
|
|
if (!ath_hal_wait(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_CAL, 0)) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: offset calibration did not complete in 1ms; "
|
|
"noisy environment?\n", __func__);
|
|
return AH_FALSE;
|
|
}
|
|
|
|
/*
|
|
* Do NF calibration after DC offset and other CALs.
|
|
* Per system engineers, noise floor value can sometimes be 20 dB
|
|
* higher than normal value if DC offset and noise floor cal are
|
|
* triggered at the same time.
|
|
*/
|
|
OS_REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_NF);
|
|
|
|
/* Initialize list pointers */
|
|
cal->cal_list = cal->cal_last = cal->cal_curr = AH_NULL;
|
|
|
|
/*
|
|
* Enable IQ, ADC Gain, ADC DC Offset Cals
|
|
*/
|
|
if (AR_SREV_SOWL_10_OR_LATER(ah)) {
|
|
/* Setup all non-periodic, init time only calibrations */
|
|
/* XXX: Init DC Offset not working yet */
|
|
#if 0
|
|
if (ar5416IsCalSupp(ah, chan, ADC_DC_INIT_CAL)) {
|
|
INIT_CAL(&cal->adcDcCalInitData);
|
|
INSERT_CAL(cal, &cal->adcDcCalInitData);
|
|
}
|
|
/* Initialize current pointer to first element in list */
|
|
cal->cal_curr = cal->cal_list;
|
|
|
|
if (cal->ah_cal_curr != AH_NULL && !ar5416RunInitCals(ah, 0))
|
|
return AH_FALSE;
|
|
#endif
|
|
}
|
|
|
|
/* If Cals are supported, add them to list via INIT/INSERT_CAL */
|
|
if (ar5416IsCalSupp(ah, chan, ADC_GAIN_CAL)) {
|
|
INIT_CAL(&cal->adcGainCalData);
|
|
INSERT_CAL(cal, &cal->adcGainCalData);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: enable ADC Gain Calibration.\n", __func__);
|
|
}
|
|
if (ar5416IsCalSupp(ah, chan, ADC_DC_CAL)) {
|
|
INIT_CAL(&cal->adcDcCalData);
|
|
INSERT_CAL(cal, &cal->adcDcCalData);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: enable ADC DC Calibration.\n", __func__);
|
|
}
|
|
if (ar5416IsCalSupp(ah, chan, IQ_MISMATCH_CAL)) {
|
|
INIT_CAL(&cal->iqCalData);
|
|
INSERT_CAL(cal, &cal->iqCalData);
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: enable IQ Calibration.\n", __func__);
|
|
}
|
|
/* Initialize current pointer to first element in list */
|
|
cal->cal_curr = cal->cal_list;
|
|
|
|
/* Kick off measurements for the first cal */
|
|
if (cal->cal_curr != AH_NULL)
|
|
ar5416ResetMeasurement(ah, cal->cal_curr);
|
|
|
|
/* Mark all calibrations on this channel as being invalid */
|
|
ichan->calValid = 0;
|
|
|
|
return AH_TRUE;
|
|
}
|
|
|
|
/*
|
|
* Entry point for upper layers to restart current cal.
|
|
* Reset the calibration valid bit in channel.
|
|
*/
|
|
HAL_BOOL
|
|
ar5416ResetCalValid(struct ath_hal *ah, const struct ieee80211_channel *chan)
|
|
{
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan);
|
|
HAL_CAL_LIST *currCal = cal->cal_curr;
|
|
|
|
if (!AR_SREV_SOWL_10_OR_LATER(ah))
|
|
return AH_FALSE;
|
|
if (currCal == AH_NULL)
|
|
return AH_FALSE;
|
|
if (ichan == AH_NULL) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: invalid channel %u/0x%x; no mapping\n",
|
|
__func__, chan->ic_freq, chan->ic_flags);
|
|
return AH_FALSE;
|
|
}
|
|
/*
|
|
* Expected that this calibration has run before, post-reset.
|
|
* Current state should be done
|
|
*/
|
|
if (currCal->calState != CAL_DONE) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: Calibration state incorrect, %d\n",
|
|
__func__, currCal->calState);
|
|
return AH_FALSE;
|
|
}
|
|
|
|
/* Verify Cal is supported on this channel */
|
|
if (!ar5416IsCalSupp(ah, chan, currCal->calData->calType))
|
|
return AH_FALSE;
|
|
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: Resetting Cal %d state for channel %u/0x%x\n",
|
|
__func__, currCal->calData->calType, chan->ic_freq,
|
|
chan->ic_flags);
|
|
|
|
/* Disable cal validity in channel */
|
|
ichan->calValid &= ~currCal->calData->calType;
|
|
currCal->calState = CAL_WAITING;
|
|
|
|
return AH_TRUE;
|
|
}
|
|
|
|
/*
|
|
* Recalibrate the lower PHY chips to account for temperature/environment
|
|
* changes.
|
|
*/
|
|
static void
|
|
ar5416DoCalibration(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *ichan,
|
|
uint8_t rxchainmask, HAL_CAL_LIST *currCal, HAL_BOOL *isCalDone)
|
|
{
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
|
|
/* Cal is assumed not done until explicitly set below */
|
|
*isCalDone = AH_FALSE;
|
|
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: %s Calibration, state %d, calValid 0x%x\n",
|
|
__func__, currCal->calData->calName, currCal->calState,
|
|
ichan->calValid);
|
|
|
|
/* Calibration in progress. */
|
|
if (currCal->calState == CAL_RUNNING) {
|
|
/* Check to see if it has finished. */
|
|
if (!(OS_REG_READ(ah, AR_PHY_TIMING_CTRL4) & AR_PHY_TIMING_CTRL4_DO_CAL)) {
|
|
HALDEBUG(ah, HAL_DEBUG_PERCAL,
|
|
"%s: sample %d of %d finished\n",
|
|
__func__, cal->calSamples,
|
|
currCal->calData->calNumSamples);
|
|
/*
|
|
* Collect measurements for active chains.
|
|
*/
|
|
currCal->calData->calCollect(ah);
|
|
if (++cal->calSamples >= currCal->calData->calNumSamples) {
|
|
int i, numChains = 0;
|
|
for (i = 0; i < AR5416_MAX_CHAINS; i++) {
|
|
if (rxchainmask & (1 << i))
|
|
numChains++;
|
|
}
|
|
/*
|
|
* Process accumulated data
|
|
*/
|
|
currCal->calData->calPostProc(ah, numChains);
|
|
|
|
/* Calibration has finished. */
|
|
ichan->calValid |= currCal->calData->calType;
|
|
currCal->calState = CAL_DONE;
|
|
*isCalDone = AH_TRUE;
|
|
} else {
|
|
/*
|
|
* Set-up to collect of another sub-sample.
|
|
*/
|
|
ar5416SetupMeasurement(ah, currCal);
|
|
}
|
|
}
|
|
} else if (!(ichan->calValid & currCal->calData->calType)) {
|
|
/* If current cal is marked invalid in channel, kick it off */
|
|
ar5416ResetMeasurement(ah, currCal);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Internal interface to schedule periodic calibration work.
|
|
*/
|
|
HAL_BOOL
|
|
ar5416PerCalibrationN(struct ath_hal *ah, struct ieee80211_channel *chan,
|
|
u_int rxchainmask, HAL_BOOL longcal, HAL_BOOL *isCalDone)
|
|
{
|
|
struct ar5416PerCal *cal = &AH5416(ah)->ah_cal;
|
|
HAL_CAL_LIST *currCal = cal->cal_curr;
|
|
HAL_CHANNEL_INTERNAL *ichan;
|
|
|
|
OS_MARK(ah, AH_MARK_PERCAL, chan->ic_freq);
|
|
|
|
*isCalDone = AH_TRUE;
|
|
|
|
/* Invalid channel check */
|
|
ichan = ath_hal_checkchannel(ah, chan);
|
|
if (ichan == AH_NULL) {
|
|
HALDEBUG(ah, HAL_DEBUG_ANY,
|
|
"%s: invalid channel %u/0x%x; no mapping\n",
|
|
__func__, chan->ic_freq, chan->ic_flags);
|
|
return AH_FALSE;
|
|
}
|
|
|
|
/*
|
|
* For given calibration:
|
|
* 1. Call generic cal routine
|
|
* 2. When this cal is done (isCalDone) if we have more cals waiting
|
|
* (eg after reset), mask this to upper layers by not propagating
|
|
* isCalDone if it is set to TRUE.
|
|
* Instead, change isCalDone to FALSE and setup the waiting cal(s)
|
|
* to be run.
|
|
*/
|
|
if (currCal != AH_NULL &&
|
|
(currCal->calState == CAL_RUNNING ||
|
|
currCal->calState == CAL_WAITING)) {
|
|
ar5416DoCalibration(ah, ichan, rxchainmask, currCal, isCalDone);
|
|
if (*isCalDone == AH_TRUE) {
|
|
cal->cal_curr = currCal = currCal->calNext;
|
|
if (currCal->calState == CAL_WAITING) {
|
|
*isCalDone = AH_FALSE;
|
|
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, j;
|
|
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. */
|
|
for (j = 0; j < 1000; j++) {
|
|
if ((OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) == 0)
|
|
break;
|
|
OS_DELAY(10);
|
|
}
|
|
|
|
/*
|
|
* 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 (OS_REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) {
|
|
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;
|
|
}
|