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linux/drivers/net/wireless/ath9k/ani.c
Sujith cee075a24e ath9k: Update copyright in all the files 
How time flies.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-03-27 20:12:51 -04:00

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/*
* Copyright (c) 2008-2009 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.
*/
#include "ath9k.h"
static int ath9k_hw_get_ani_channel_idx(struct ath_hw *ah,
struct ath9k_channel *chan)
{
int i;
for (i = 0; i < ARRAY_SIZE(ah->ani); i++) {
if (ah->ani[i].c &&
ah->ani[i].c->channel == chan->channel)
return i;
if (ah->ani[i].c == NULL) {
ah->ani[i].c = chan;
return i;
}
}
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"No more channel states left. Using channel 0\n");
return 0;
}
static bool ath9k_hw_ani_control(struct ath_hw *ah,
enum ath9k_ani_cmd cmd, int param)
{
struct ar5416AniState *aniState = ah->curani;
switch (cmd & ah->ani_function) {
case ATH9K_ANI_NOISE_IMMUNITY_LEVEL:{
u32 level = param;
if (level >= ARRAY_SIZE(ah->totalSizeDesired)) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"level out of range (%u > %u)\n",
level,
(unsigned)ARRAY_SIZE(ah->totalSizeDesired));
return false;
}
REG_RMW_FIELD(ah, AR_PHY_DESIRED_SZ,
AR_PHY_DESIRED_SZ_TOT_DES,
ah->totalSizeDesired[level]);
REG_RMW_FIELD(ah, AR_PHY_AGC_CTL1,
AR_PHY_AGC_CTL1_COARSE_LOW,
ah->coarse_low[level]);
REG_RMW_FIELD(ah, AR_PHY_AGC_CTL1,
AR_PHY_AGC_CTL1_COARSE_HIGH,
ah->coarse_high[level]);
REG_RMW_FIELD(ah, AR_PHY_FIND_SIG,
AR_PHY_FIND_SIG_FIRPWR,
ah->firpwr[level]);
if (level > aniState->noiseImmunityLevel)
ah->stats.ast_ani_niup++;
else if (level < aniState->noiseImmunityLevel)
ah->stats.ast_ani_nidown++;
aniState->noiseImmunityLevel = level;
break;
}
case ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION:{
const int m1ThreshLow[] = { 127, 50 };
const int m2ThreshLow[] = { 127, 40 };
const int m1Thresh[] = { 127, 0x4d };
const int m2Thresh[] = { 127, 0x40 };
const int m2CountThr[] = { 31, 16 };
const int m2CountThrLow[] = { 63, 48 };
u32 on = param ? 1 : 0;
REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW,
AR_PHY_SFCORR_LOW_M1_THRESH_LOW,
m1ThreshLow[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW,
AR_PHY_SFCORR_LOW_M2_THRESH_LOW,
m2ThreshLow[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR,
AR_PHY_SFCORR_M1_THRESH,
m1Thresh[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR,
AR_PHY_SFCORR_M2_THRESH,
m2Thresh[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR,
AR_PHY_SFCORR_M2COUNT_THR,
m2CountThr[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR_LOW,
AR_PHY_SFCORR_LOW_M2COUNT_THR_LOW,
m2CountThrLow[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
AR_PHY_SFCORR_EXT_M1_THRESH_LOW,
m1ThreshLow[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
AR_PHY_SFCORR_EXT_M2_THRESH_LOW,
m2ThreshLow[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
AR_PHY_SFCORR_EXT_M1_THRESH,
m1Thresh[on]);
REG_RMW_FIELD(ah, AR_PHY_SFCORR_EXT,
AR_PHY_SFCORR_EXT_M2_THRESH,
m2Thresh[on]);
if (on)
REG_SET_BIT(ah, AR_PHY_SFCORR_LOW,
AR_PHY_SFCORR_LOW_USE_SELF_CORR_LOW);
else
REG_CLR_BIT(ah, AR_PHY_SFCORR_LOW,
AR_PHY_SFCORR_LOW_USE_SELF_CORR_LOW);
if (!on != aniState->ofdmWeakSigDetectOff) {
if (on)
ah->stats.ast_ani_ofdmon++;
else
ah->stats.ast_ani_ofdmoff++;
aniState->ofdmWeakSigDetectOff = !on;
}
break;
}
case ATH9K_ANI_CCK_WEAK_SIGNAL_THR:{
const int weakSigThrCck[] = { 8, 6 };
u32 high = param ? 1 : 0;
REG_RMW_FIELD(ah, AR_PHY_CCK_DETECT,
AR_PHY_CCK_DETECT_WEAK_SIG_THR_CCK,
weakSigThrCck[high]);
if (high != aniState->cckWeakSigThreshold) {
if (high)
ah->stats.ast_ani_cckhigh++;
else
ah->stats.ast_ani_ccklow++;
aniState->cckWeakSigThreshold = high;
}
break;
}
case ATH9K_ANI_FIRSTEP_LEVEL:{
const int firstep[] = { 0, 4, 8 };
u32 level = param;
if (level >= ARRAY_SIZE(firstep)) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"level out of range (%u > %u)\n",
level,
(unsigned) ARRAY_SIZE(firstep));
return false;
}
REG_RMW_FIELD(ah, AR_PHY_FIND_SIG,
AR_PHY_FIND_SIG_FIRSTEP,
firstep[level]);
if (level > aniState->firstepLevel)
ah->stats.ast_ani_stepup++;
else if (level < aniState->firstepLevel)
ah->stats.ast_ani_stepdown++;
aniState->firstepLevel = level;
break;
}
case ATH9K_ANI_SPUR_IMMUNITY_LEVEL:{
const int cycpwrThr1[] =
{ 2, 4, 6, 8, 10, 12, 14, 16 };
u32 level = param;
if (level >= ARRAY_SIZE(cycpwrThr1)) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"level out of range (%u > %u)\n",
level,
(unsigned)
ARRAY_SIZE(cycpwrThr1));
return false;
}
REG_RMW_FIELD(ah, AR_PHY_TIMING5,
AR_PHY_TIMING5_CYCPWR_THR1,
cycpwrThr1[level]);
if (level > aniState->spurImmunityLevel)
ah->stats.ast_ani_spurup++;
else if (level < aniState->spurImmunityLevel)
ah->stats.ast_ani_spurdown++;
aniState->spurImmunityLevel = level;
break;
}
case ATH9K_ANI_PRESENT:
break;
default:
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"invalid cmd %u\n", cmd);
return false;
}
DPRINTF(ah->ah_sc, ATH_DBG_ANI, "ANI parameters:\n");
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"noiseImmunityLevel=%d, spurImmunityLevel=%d, "
"ofdmWeakSigDetectOff=%d\n",
aniState->noiseImmunityLevel, aniState->spurImmunityLevel,
!aniState->ofdmWeakSigDetectOff);
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"cckWeakSigThreshold=%d, "
"firstepLevel=%d, listenTime=%d\n",
aniState->cckWeakSigThreshold, aniState->firstepLevel,
aniState->listenTime);
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"cycleCount=%d, ofdmPhyErrCount=%d, cckPhyErrCount=%d\n\n",
aniState->cycleCount, aniState->ofdmPhyErrCount,
aniState->cckPhyErrCount);
return true;
}
static void ath9k_hw_update_mibstats(struct ath_hw *ah,
struct ath9k_mib_stats *stats)
{
stats->ackrcv_bad += REG_READ(ah, AR_ACK_FAIL);
stats->rts_bad += REG_READ(ah, AR_RTS_FAIL);
stats->fcs_bad += REG_READ(ah, AR_FCS_FAIL);
stats->rts_good += REG_READ(ah, AR_RTS_OK);
stats->beacons += REG_READ(ah, AR_BEACON_CNT);
}
static void ath9k_ani_restart(struct ath_hw *ah)
{
struct ar5416AniState *aniState;
if (!DO_ANI(ah))
return;
aniState = ah->curani;
aniState->listenTime = 0;
if (ah->has_hw_phycounters) {
if (aniState->ofdmTrigHigh > AR_PHY_COUNTMAX) {
aniState->ofdmPhyErrBase = 0;
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"OFDM Trigger is too high for hw counters\n");
} else {
aniState->ofdmPhyErrBase =
AR_PHY_COUNTMAX - aniState->ofdmTrigHigh;
}
if (aniState->cckTrigHigh > AR_PHY_COUNTMAX) {
aniState->cckPhyErrBase = 0;
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"CCK Trigger is too high for hw counters\n");
} else {
aniState->cckPhyErrBase =
AR_PHY_COUNTMAX - aniState->cckTrigHigh;
}
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"Writing ofdmbase=%u cckbase=%u\n",
aniState->ofdmPhyErrBase,
aniState->cckPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_1, aniState->ofdmPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_2, aniState->cckPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING);
REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
}
aniState->ofdmPhyErrCount = 0;
aniState->cckPhyErrCount = 0;
}
static void ath9k_hw_ani_ofdm_err_trigger(struct ath_hw *ah)
{
struct ieee80211_conf *conf = &ah->ah_sc->hw->conf;
struct ar5416AniState *aniState;
int32_t rssi;
if (!DO_ANI(ah))
return;
aniState = ah->curani;
if (aniState->noiseImmunityLevel < HAL_NOISE_IMMUNE_MAX) {
if (ath9k_hw_ani_control(ah, ATH9K_ANI_NOISE_IMMUNITY_LEVEL,
aniState->noiseImmunityLevel + 1)) {
return;
}
}
if (aniState->spurImmunityLevel < HAL_SPUR_IMMUNE_MAX) {
if (ath9k_hw_ani_control(ah, ATH9K_ANI_SPUR_IMMUNITY_LEVEL,
aniState->spurImmunityLevel + 1)) {
return;
}
}
if (ah->opmode == NL80211_IFTYPE_AP) {
if (aniState->firstepLevel < HAL_FIRST_STEP_MAX) {
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel + 1);
}
return;
}
rssi = BEACON_RSSI(ah);
if (rssi > aniState->rssiThrHigh) {
if (!aniState->ofdmWeakSigDetectOff) {
if (ath9k_hw_ani_control(ah,
ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
false)) {
ath9k_hw_ani_control(ah,
ATH9K_ANI_SPUR_IMMUNITY_LEVEL, 0);
return;
}
}
if (aniState->firstepLevel < HAL_FIRST_STEP_MAX) {
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel + 1);
return;
}
} else if (rssi > aniState->rssiThrLow) {
if (aniState->ofdmWeakSigDetectOff)
ath9k_hw_ani_control(ah,
ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
true);
if (aniState->firstepLevel < HAL_FIRST_STEP_MAX)
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel + 1);
return;
} else {
if (conf->channel->band == IEEE80211_BAND_2GHZ) {
if (!aniState->ofdmWeakSigDetectOff)
ath9k_hw_ani_control(ah,
ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
false);
if (aniState->firstepLevel > 0)
ath9k_hw_ani_control(ah,
ATH9K_ANI_FIRSTEP_LEVEL, 0);
return;
}
}
}
static void ath9k_hw_ani_cck_err_trigger(struct ath_hw *ah)
{
struct ieee80211_conf *conf = &ah->ah_sc->hw->conf;
struct ar5416AniState *aniState;
int32_t rssi;
if (!DO_ANI(ah))
return;
aniState = ah->curani;
if (aniState->noiseImmunityLevel < HAL_NOISE_IMMUNE_MAX) {
if (ath9k_hw_ani_control(ah, ATH9K_ANI_NOISE_IMMUNITY_LEVEL,
aniState->noiseImmunityLevel + 1)) {
return;
}
}
if (ah->opmode == NL80211_IFTYPE_AP) {
if (aniState->firstepLevel < HAL_FIRST_STEP_MAX) {
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel + 1);
}
return;
}
rssi = BEACON_RSSI(ah);
if (rssi > aniState->rssiThrLow) {
if (aniState->firstepLevel < HAL_FIRST_STEP_MAX)
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel + 1);
} else {
if (conf->channel->band == IEEE80211_BAND_2GHZ) {
if (aniState->firstepLevel > 0)
ath9k_hw_ani_control(ah,
ATH9K_ANI_FIRSTEP_LEVEL, 0);
}
}
}
static void ath9k_hw_ani_lower_immunity(struct ath_hw *ah)
{
struct ar5416AniState *aniState;
int32_t rssi;
aniState = ah->curani;
if (ah->opmode == NL80211_IFTYPE_AP) {
if (aniState->firstepLevel > 0) {
if (ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel - 1))
return;
}
} else {
rssi = BEACON_RSSI(ah);
if (rssi > aniState->rssiThrHigh) {
/* XXX: Handle me */
} else if (rssi > aniState->rssiThrLow) {
if (aniState->ofdmWeakSigDetectOff) {
if (ath9k_hw_ani_control(ah,
ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
true) == true)
return;
}
if (aniState->firstepLevel > 0) {
if (ath9k_hw_ani_control(ah,
ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel - 1) == true)
return;
}
} else {
if (aniState->firstepLevel > 0) {
if (ath9k_hw_ani_control(ah,
ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel - 1) == true)
return;
}
}
}
if (aniState->spurImmunityLevel > 0) {
if (ath9k_hw_ani_control(ah, ATH9K_ANI_SPUR_IMMUNITY_LEVEL,
aniState->spurImmunityLevel - 1))
return;
}
if (aniState->noiseImmunityLevel > 0) {
ath9k_hw_ani_control(ah, ATH9K_ANI_NOISE_IMMUNITY_LEVEL,
aniState->noiseImmunityLevel - 1);
return;
}
}
static int32_t ath9k_hw_ani_get_listen_time(struct ath_hw *ah)
{
struct ar5416AniState *aniState;
u32 txFrameCount, rxFrameCount, cycleCount;
int32_t listenTime;
txFrameCount = REG_READ(ah, AR_TFCNT);
rxFrameCount = REG_READ(ah, AR_RFCNT);
cycleCount = REG_READ(ah, AR_CCCNT);
aniState = ah->curani;
if (aniState->cycleCount == 0 || aniState->cycleCount > cycleCount) {
listenTime = 0;
ah->stats.ast_ani_lzero++;
} else {
int32_t ccdelta = cycleCount - aniState->cycleCount;
int32_t rfdelta = rxFrameCount - aniState->rxFrameCount;
int32_t tfdelta = txFrameCount - aniState->txFrameCount;
listenTime = (ccdelta - rfdelta - tfdelta) / 44000;
}
aniState->cycleCount = cycleCount;
aniState->txFrameCount = txFrameCount;
aniState->rxFrameCount = rxFrameCount;
return listenTime;
}
void ath9k_ani_reset(struct ath_hw *ah)
{
struct ar5416AniState *aniState;
struct ath9k_channel *chan = ah->curchan;
int index;
if (!DO_ANI(ah))
return;
index = ath9k_hw_get_ani_channel_idx(ah, chan);
aniState = &ah->ani[index];
ah->curani = aniState;
if (DO_ANI(ah) && ah->opmode != NL80211_IFTYPE_STATION
&& ah->opmode != NL80211_IFTYPE_ADHOC) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"Reset ANI state opmode %u\n", ah->opmode);
ah->stats.ast_ani_reset++;
ath9k_hw_ani_control(ah, ATH9K_ANI_NOISE_IMMUNITY_LEVEL, 0);
ath9k_hw_ani_control(ah, ATH9K_ANI_SPUR_IMMUNITY_LEVEL, 0);
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL, 0);
ath9k_hw_ani_control(ah, ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
!ATH9K_ANI_USE_OFDM_WEAK_SIG);
ath9k_hw_ani_control(ah, ATH9K_ANI_CCK_WEAK_SIGNAL_THR,
ATH9K_ANI_CCK_WEAK_SIG_THR);
ath9k_hw_setrxfilter(ah, ath9k_hw_getrxfilter(ah) |
ATH9K_RX_FILTER_PHYERR);
if (ah->opmode == NL80211_IFTYPE_AP) {
ah->curani->ofdmTrigHigh =
ah->config.ofdm_trig_high;
ah->curani->ofdmTrigLow =
ah->config.ofdm_trig_low;
ah->curani->cckTrigHigh =
ah->config.cck_trig_high;
ah->curani->cckTrigLow =
ah->config.cck_trig_low;
}
ath9k_ani_restart(ah);
return;
}
if (aniState->noiseImmunityLevel != 0)
ath9k_hw_ani_control(ah, ATH9K_ANI_NOISE_IMMUNITY_LEVEL,
aniState->noiseImmunityLevel);
if (aniState->spurImmunityLevel != 0)
ath9k_hw_ani_control(ah, ATH9K_ANI_SPUR_IMMUNITY_LEVEL,
aniState->spurImmunityLevel);
if (aniState->ofdmWeakSigDetectOff)
ath9k_hw_ani_control(ah, ATH9K_ANI_OFDM_WEAK_SIGNAL_DETECTION,
!aniState->ofdmWeakSigDetectOff);
if (aniState->cckWeakSigThreshold)
ath9k_hw_ani_control(ah, ATH9K_ANI_CCK_WEAK_SIGNAL_THR,
aniState->cckWeakSigThreshold);
if (aniState->firstepLevel != 0)
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL,
aniState->firstepLevel);
if (ah->has_hw_phycounters) {
ath9k_hw_setrxfilter(ah, ath9k_hw_getrxfilter(ah) &
~ATH9K_RX_FILTER_PHYERR);
ath9k_ani_restart(ah);
REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING);
REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
} else {
ath9k_ani_restart(ah);
ath9k_hw_setrxfilter(ah, ath9k_hw_getrxfilter(ah) |
ATH9K_RX_FILTER_PHYERR);
}
}
void ath9k_hw_ani_monitor(struct ath_hw *ah,
const struct ath9k_node_stats *stats,
struct ath9k_channel *chan)
{
struct ar5416AniState *aniState;
int32_t listenTime;
if (!DO_ANI(ah))
return;
aniState = ah->curani;
ah->stats.ast_nodestats = *stats;
listenTime = ath9k_hw_ani_get_listen_time(ah);
if (listenTime < 0) {
ah->stats.ast_ani_lneg++;
ath9k_ani_restart(ah);
return;
}
aniState->listenTime += listenTime;
if (ah->has_hw_phycounters) {
u32 phyCnt1, phyCnt2;
u32 ofdmPhyErrCnt, cckPhyErrCnt;
ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
phyCnt1 = REG_READ(ah, AR_PHY_ERR_1);
phyCnt2 = REG_READ(ah, AR_PHY_ERR_2);
if (phyCnt1 < aniState->ofdmPhyErrBase ||
phyCnt2 < aniState->cckPhyErrBase) {
if (phyCnt1 < aniState->ofdmPhyErrBase) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"phyCnt1 0x%x, resetting "
"counter value to 0x%x\n",
phyCnt1,
aniState->ofdmPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_1,
aniState->ofdmPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_MASK_1,
AR_PHY_ERR_OFDM_TIMING);
}
if (phyCnt2 < aniState->cckPhyErrBase) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"phyCnt2 0x%x, resetting "
"counter value to 0x%x\n",
phyCnt2,
aniState->cckPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_2,
aniState->cckPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_MASK_2,
AR_PHY_ERR_CCK_TIMING);
}
return;
}
ofdmPhyErrCnt = phyCnt1 - aniState->ofdmPhyErrBase;
ah->stats.ast_ani_ofdmerrs +=
ofdmPhyErrCnt - aniState->ofdmPhyErrCount;
aniState->ofdmPhyErrCount = ofdmPhyErrCnt;
cckPhyErrCnt = phyCnt2 - aniState->cckPhyErrBase;
ah->stats.ast_ani_cckerrs +=
cckPhyErrCnt - aniState->cckPhyErrCount;
aniState->cckPhyErrCount = cckPhyErrCnt;
}
if (aniState->listenTime > 5 * ah->aniperiod) {
if (aniState->ofdmPhyErrCount <= aniState->listenTime *
aniState->ofdmTrigLow / 1000 &&
aniState->cckPhyErrCount <= aniState->listenTime *
aniState->cckTrigLow / 1000)
ath9k_hw_ani_lower_immunity(ah);
ath9k_ani_restart(ah);
} else if (aniState->listenTime > ah->aniperiod) {
if (aniState->ofdmPhyErrCount > aniState->listenTime *
aniState->ofdmTrigHigh / 1000) {
ath9k_hw_ani_ofdm_err_trigger(ah);
ath9k_ani_restart(ah);
} else if (aniState->cckPhyErrCount >
aniState->listenTime * aniState->cckTrigHigh /
1000) {
ath9k_hw_ani_cck_err_trigger(ah);
ath9k_ani_restart(ah);
}
}
}
bool ath9k_hw_phycounters(struct ath_hw *ah)
{
return ah->has_hw_phycounters ? true : false;
}
void ath9k_enable_mib_counters(struct ath_hw *ah)
{
DPRINTF(ah->ah_sc, ATH_DBG_ANI, "Enable MIB counters\n");
ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
REG_WRITE(ah, AR_FILT_OFDM, 0);
REG_WRITE(ah, AR_FILT_CCK, 0);
REG_WRITE(ah, AR_MIBC,
~(AR_MIBC_COW | AR_MIBC_FMC | AR_MIBC_CMC | AR_MIBC_MCS)
& 0x0f);
REG_WRITE(ah, AR_PHY_ERR_MASK_1, AR_PHY_ERR_OFDM_TIMING);
REG_WRITE(ah, AR_PHY_ERR_MASK_2, AR_PHY_ERR_CCK_TIMING);
}
/* Freeze the MIB counters, get the stats and then clear them */
void ath9k_hw_disable_mib_counters(struct ath_hw *ah)
{
DPRINTF(ah->ah_sc, ATH_DBG_ANI, "Disable MIB counters\n");
REG_WRITE(ah, AR_MIBC, AR_MIBC_FMC);
ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
REG_WRITE(ah, AR_MIBC, AR_MIBC_CMC);
REG_WRITE(ah, AR_FILT_OFDM, 0);
REG_WRITE(ah, AR_FILT_CCK, 0);
}
u32 ath9k_hw_GetMibCycleCountsPct(struct ath_hw *ah,
u32 *rxc_pcnt,
u32 *rxf_pcnt,
u32 *txf_pcnt)
{
static u32 cycles, rx_clear, rx_frame, tx_frame;
u32 good = 1;
u32 rc = REG_READ(ah, AR_RCCNT);
u32 rf = REG_READ(ah, AR_RFCNT);
u32 tf = REG_READ(ah, AR_TFCNT);
u32 cc = REG_READ(ah, AR_CCCNT);
if (cycles == 0 || cycles > cc) {
DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
"cycle counter wrap. ExtBusy = 0\n");
good = 0;
} else {
u32 cc_d = cc - cycles;
u32 rc_d = rc - rx_clear;
u32 rf_d = rf - rx_frame;
u32 tf_d = tf - tx_frame;
if (cc_d != 0) {
*rxc_pcnt = rc_d * 100 / cc_d;
*rxf_pcnt = rf_d * 100 / cc_d;
*txf_pcnt = tf_d * 100 / cc_d;
} else {
good = 0;
}
}
cycles = cc;
rx_frame = rf;
rx_clear = rc;
tx_frame = tf;
return good;
}
/*
* Process a MIB interrupt. We may potentially be invoked because
* any of the MIB counters overflow/trigger so don't assume we're
* here because a PHY error counter triggered.
*/
void ath9k_hw_procmibevent(struct ath_hw *ah,
const struct ath9k_node_stats *stats)
{
u32 phyCnt1, phyCnt2;
/* Reset these counters regardless */
REG_WRITE(ah, AR_FILT_OFDM, 0);
REG_WRITE(ah, AR_FILT_CCK, 0);
if (!(REG_READ(ah, AR_SLP_MIB_CTRL) & AR_SLP_MIB_PENDING))
REG_WRITE(ah, AR_SLP_MIB_CTRL, AR_SLP_MIB_CLEAR);
/* Clear the mib counters and save them in the stats */
ath9k_hw_update_mibstats(ah, &ah->ah_mibStats);
ah->stats.ast_nodestats = *stats;
if (!DO_ANI(ah))
return;
/* NB: these are not reset-on-read */
phyCnt1 = REG_READ(ah, AR_PHY_ERR_1);
phyCnt2 = REG_READ(ah, AR_PHY_ERR_2);
if (((phyCnt1 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK) ||
((phyCnt2 & AR_MIBCNT_INTRMASK) == AR_MIBCNT_INTRMASK)) {
struct ar5416AniState *aniState = ah->curani;
u32 ofdmPhyErrCnt, cckPhyErrCnt;
/* NB: only use ast_ani_*errs with AH_PRIVATE_DIAG */
ofdmPhyErrCnt = phyCnt1 - aniState->ofdmPhyErrBase;
ah->stats.ast_ani_ofdmerrs +=
ofdmPhyErrCnt - aniState->ofdmPhyErrCount;
aniState->ofdmPhyErrCount = ofdmPhyErrCnt;
cckPhyErrCnt = phyCnt2 - aniState->cckPhyErrBase;
ah->stats.ast_ani_cckerrs +=
cckPhyErrCnt - aniState->cckPhyErrCount;
aniState->cckPhyErrCount = cckPhyErrCnt;
/*
* NB: figure out which counter triggered. If both
* trigger we'll only deal with one as the processing
* clobbers the error counter so the trigger threshold
* check will never be true.
*/
if (aniState->ofdmPhyErrCount > aniState->ofdmTrigHigh)
ath9k_hw_ani_ofdm_err_trigger(ah);
if (aniState->cckPhyErrCount > aniState->cckTrigHigh)
ath9k_hw_ani_cck_err_trigger(ah);
/* NB: always restart to insure the h/w counters are reset */
ath9k_ani_restart(ah);
}
}
void ath9k_hw_ani_setup(struct ath_hw *ah)
{
int i;
const int totalSizeDesired[] = { -55, -55, -55, -55, -62 };
const int coarseHigh[] = { -14, -14, -14, -14, -12 };
const int coarseLow[] = { -64, -64, -64, -64, -70 };
const int firpwr[] = { -78, -78, -78, -78, -80 };
for (i = 0; i < 5; i++) {
ah->totalSizeDesired[i] = totalSizeDesired[i];
ah->coarse_high[i] = coarseHigh[i];
ah->coarse_low[i] = coarseLow[i];
ah->firpwr[i] = firpwr[i];
}
}
void ath9k_hw_ani_attach(struct ath_hw *ah)
{
int i;
DPRINTF(ah->ah_sc, ATH_DBG_ANI, "Attach ANI\n");
ah->has_hw_phycounters = 1;
memset(ah->ani, 0, sizeof(ah->ani));
for (i = 0; i < ARRAY_SIZE(ah->ani); i++) {
ah->ani[i].ofdmTrigHigh = ATH9K_ANI_OFDM_TRIG_HIGH;
ah->ani[i].ofdmTrigLow = ATH9K_ANI_OFDM_TRIG_LOW;
ah->ani[i].cckTrigHigh = ATH9K_ANI_CCK_TRIG_HIGH;
ah->ani[i].cckTrigLow = ATH9K_ANI_CCK_TRIG_LOW;
ah->ani[i].rssiThrHigh = ATH9K_ANI_RSSI_THR_HIGH;
ah->ani[i].rssiThrLow = ATH9K_ANI_RSSI_THR_LOW;
ah->ani[i].ofdmWeakSigDetectOff =
!ATH9K_ANI_USE_OFDM_WEAK_SIG;
ah->ani[i].cckWeakSigThreshold =
ATH9K_ANI_CCK_WEAK_SIG_THR;
ah->ani[i].spurImmunityLevel = ATH9K_ANI_SPUR_IMMUNE_LVL;
ah->ani[i].firstepLevel = ATH9K_ANI_FIRSTEP_LVL;
if (ah->has_hw_phycounters) {
ah->ani[i].ofdmPhyErrBase =
AR_PHY_COUNTMAX - ATH9K_ANI_OFDM_TRIG_HIGH;
ah->ani[i].cckPhyErrBase =
AR_PHY_COUNTMAX - ATH9K_ANI_CCK_TRIG_HIGH;
}
}
if (ah->has_hw_phycounters) {
DPRINTF(ah->ah_sc, ATH_DBG_ANI,
"Setting OfdmErrBase = 0x%08x\n",
ah->ani[0].ofdmPhyErrBase);
DPRINTF(ah->ah_sc, ATH_DBG_ANI, "Setting cckErrBase = 0x%08x\n",
ah->ani[0].cckPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_1, ah->ani[0].ofdmPhyErrBase);
REG_WRITE(ah, AR_PHY_ERR_2, ah->ani[0].cckPhyErrBase);
ath9k_enable_mib_counters(ah);
}
ah->aniperiod = ATH9K_ANI_PERIOD;
if (ah->config.enable_ani)
ah->proc_phyerr |= HAL_PROCESS_ANI;
}
void ath9k_hw_ani_detach(struct ath_hw *ah)
{
DPRINTF(ah->ah_sc, ATH_DBG_ANI, "Detach ANI\n");
if (ah->has_hw_phycounters) {
ath9k_hw_disable_mib_counters(ah);
REG_WRITE(ah, AR_PHY_ERR_1, 0);
REG_WRITE(ah, AR_PHY_ERR_2, 0);
}
}
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