/*
* Read the NF and check it against the noise floor threshold
*
* Return 0 if the NF calibration hadn't finished, 0 if it was
* invalid, or > 0 for a valid NF reading.
*/
static int16_t
ar5416GetNf(struct ath_hal *ah, struct ieee80211_channel *chan)
{
int16_t nf, nfThresh;
int i;
int retval = 0;
if (ar5212IsNFCalInProgress(ah)) {
HALDEBUG(ah, HAL_DEBUG_ANY,
"%s: NF didn't complete in calibration window\n", __func__);
nf = 0;
retval = -1; /* NF didn't finish */
} 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];
ar5416SanitizeNF(ah, nfarray);
if (ar5416GetEepromNoiseFloorThresh(ah, chan, &nfThresh)) {
if (nf > nfThresh) {
HALDEBUG(ah, HAL_DEBUG_UNMASKABLE,
"%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;
retval = 0;
}
} else {
nf = 0;
retval = 0;
}
/* Update MIMO channel statistics, regardless of validity or not (for now) */
for (i = 0; i < 3; i++) {
ichan->noiseFloorCtl[i] = nfarray[i];
ichan->noiseFloorExt[i] = nfarray[i + 3];
}
ichan->privFlags |= CHANNEL_MIMO_NF_VALID;
ar5416UpdateNFHistBuff(ah, AH5416(ah)->ah_cal.nfCalHist, nfarray);
ichan->rawNoiseFloor = nf;
retval = nf;
}
return retval;
}
/*
* 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;
}
