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linux / linux / kernel / git / viro / vfs / 9255a42119bac1ae0ff8a97af20496b37e71ea9b / . / drivers / staging / rtl8187se / r8180_dm.c
blob: 2ccd2cb70face1c2ea6f0e53a87091c861acba98 [file] [log] [blame]
#include "r8180_dm.h"
#include "r8180_hw.h"
#include "r8180_93cx6.h"
/* Return TRUE if we shall perform High Power Mechanism, FALSE otherwise. */
#define RATE_ADAPTIVE_TIMER_PERIOD 300
bool CheckHighPower(struct net_device *dev)
{
struct r8180_priv *priv = ieee80211_priv(dev);
struct ieee80211_device *ieee = priv->ieee80211;
if (!priv->bRegHighPowerMechanism)
return false;
if (ieee->state == IEEE80211_LINKED_SCANNING)
return false;
return true;
}
/*
* Description:
* Update Tx power level if necessary.
* See also DoRxHighPower() and SetTxPowerLevel8185() for reference.
*
* Note:
* The reason why we udpate Tx power level here instead of DoRxHighPower()
* is the number of IO to change Tx power is much more than channel TR switch
* and they are related to OFDM and MAC registers.
* So, we don't want to update it so frequently in per-Rx packet base.
*/
static void DoTxHighPower(struct net_device *dev)
{
struct r8180_priv *priv = ieee80211_priv(dev);
u16 HiPwrUpperTh = 0;
u16 HiPwrLowerTh = 0;
u8 RSSIHiPwrUpperTh;
u8 RSSIHiPwrLowerTh;
u8 u1bTmp;
char OfdmTxPwrIdx, CckTxPwrIdx;
HiPwrUpperTh = priv->RegHiPwrUpperTh;
HiPwrLowerTh = priv->RegHiPwrLowerTh;
HiPwrUpperTh = HiPwrUpperTh * 10;
HiPwrLowerTh = HiPwrLowerTh * 10;
RSSIHiPwrUpperTh = priv->RegRSSIHiPwrUpperTh;
RSSIHiPwrLowerTh = priv->RegRSSIHiPwrLowerTh;
/* lzm add 080826 */
OfdmTxPwrIdx = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel];
if ((priv->UndecoratedSmoothedSS > HiPwrUpperTh) ||
(priv->bCurCCKPkt && (priv->CurCCKRSSI > RSSIHiPwrUpperTh))) {
/* Stevenl suggested that degrade 8dbm in high power sate. 2007-12-04 Isaiah */
priv->bToUpdateTxPwr = true;
u1bTmp = read_nic_byte(dev, CCK_TXAGC);
/* If it never enter High Power. */
if (CckTxPwrIdx == u1bTmp) {
u1bTmp = (u1bTmp > 16) ? (u1bTmp - 16) : 0; /* 8dbm */
write_nic_byte(dev, CCK_TXAGC, u1bTmp);
u1bTmp = read_nic_byte(dev, OFDM_TXAGC);
u1bTmp = (u1bTmp > 16) ? (u1bTmp - 16) : 0; /* 8dbm */
write_nic_byte(dev, OFDM_TXAGC, u1bTmp);
}
} else if ((priv->UndecoratedSmoothedSS < HiPwrLowerTh) &&
(!priv->bCurCCKPkt || priv->CurCCKRSSI < RSSIHiPwrLowerTh)) {
if (priv->bToUpdateTxPwr) {
priv->bToUpdateTxPwr = false;
/* SD3 required. */
u1bTmp = read_nic_byte(dev, CCK_TXAGC);
if (u1bTmp < CckTxPwrIdx) {
write_nic_byte(dev, CCK_TXAGC, CckTxPwrIdx);
}
u1bTmp = read_nic_byte(dev, OFDM_TXAGC);
if (u1bTmp < OfdmTxPwrIdx) {
write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
}
}
}
}
/*
* Description:
* Callback function of UpdateTxPowerWorkItem.
* Because of some event happened, e.g. CCX TPC, High Power Mechanism,
* We update Tx power of current channel again.
*/
void rtl8180_tx_pw_wq(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, tx_pw_wq);
struct net_device *dev = ieee->dev;
DoTxHighPower(dev);
}
/*
* Return TRUE if we shall perform DIG Mechanism, FALSE otherwise.
*/
bool CheckDig(struct net_device *dev)
{
struct r8180_priv *priv = ieee80211_priv(dev);
struct ieee80211_device *ieee = priv->ieee80211;
if (!priv->bDigMechanism)
return false;
if (ieee->state != IEEE80211_LINKED)
return false;
if ((priv->ieee80211->rate / 5) < 36) /* Schedule Dig under all OFDM rates. By Bruce, 2007-06-01. */
return false;
return true;
}
/*
* Implementation of DIG for Zebra and Zebra2.
*/
static void DIG_Zebra(struct net_device *dev)
{
struct r8180_priv *priv = ieee80211_priv(dev);
u16 CCKFalseAlarm, OFDMFalseAlarm;
u16 OfdmFA1, OfdmFA2;
int InitialGainStep = 7; /* The number of initial gain stages. */
int LowestGainStage = 4; /* The capable lowest stage of performing dig workitem. */
u32 AwakePeriodIn2Sec = 0;
CCKFalseAlarm = (u16)(priv->FalseAlarmRegValue & 0x0000ffff);
OFDMFalseAlarm = (u16)((priv->FalseAlarmRegValue >> 16) & 0x0000ffff);
OfdmFA1 = 0x15;
OfdmFA2 = ((u16)(priv->RegDigOfdmFaUpTh)) << 8;
/* The number of initial gain steps is different, by Bruce, 2007-04-13. */
if (priv->InitialGain == 0) { /* autoDIG */
/* Advised from SD3 DZ */
priv->InitialGain = 4; /* In 87B, m74dBm means State 4 (m82dBm) */
}
/* Advised from SD3 DZ */
OfdmFA1 = 0x20;
#if 1 /* lzm reserved 080826 */
AwakePeriodIn2Sec = (2000 - priv->DozePeriodInPast2Sec);
priv->DozePeriodInPast2Sec = 0;
if (AwakePeriodIn2Sec) {
OfdmFA1 = (u16)((OfdmFA1 * AwakePeriodIn2Sec) / 2000);
OfdmFA2 = (u16)((OfdmFA2 * AwakePeriodIn2Sec) / 2000);
} else {
;
}
#endif
InitialGainStep = 8;
LowestGainStage = priv->RegBModeGainStage; /* Lowest gain stage. */
if (OFDMFalseAlarm > OfdmFA1) {
if (OFDMFalseAlarm > OfdmFA2) {
priv->DIG_NumberFallbackVote++;
if (priv->DIG_NumberFallbackVote > 1) {
/* serious OFDM False Alarm, need fallback */
if (priv->InitialGain < InitialGainStep) {
priv->InitialGainBackUp = priv->InitialGain;
priv->InitialGain = (priv->InitialGain + 1);
UpdateInitialGain(dev);
}
priv->DIG_NumberFallbackVote = 0;
priv->DIG_NumberUpgradeVote = 0;
}
} else {
if (priv->DIG_NumberFallbackVote)
priv->DIG_NumberFallbackVote--;
}
priv->DIG_NumberUpgradeVote = 0;
} else {
if (priv->DIG_NumberFallbackVote)
priv->DIG_NumberFallbackVote--;
priv->DIG_NumberUpgradeVote++;
if (priv->DIG_NumberUpgradeVote > 9) {
if (priv->InitialGain > LowestGainStage) { /* In 87B, m78dBm means State 4 (m864dBm) */
priv->InitialGainBackUp = priv->InitialGain;
priv->InitialGain = (priv->InitialGain - 1);
UpdateInitialGain(dev);
}
priv->DIG_NumberFallbackVote = 0;
priv->DIG_NumberUpgradeVote = 0;
}
}
}
/*
* Dispatch DIG implementation according to RF.
*/
static void DynamicInitGain(struct net_device *dev)
{
DIG_Zebra(dev);
}
void rtl8180_hw_dig_wq(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, hw_dig_wq);
struct net_device *dev = ieee->dev;
struct r8180_priv *priv = ieee80211_priv(dev);
/* Read CCK and OFDM False Alarm. */
priv->FalseAlarmRegValue = read_nic_dword(dev, CCK_FALSE_ALARM);
/* Adjust Initial Gain dynamically. */
DynamicInitGain(dev);
}
static int IncludedInSupportedRates(struct r8180_priv *priv, u8 TxRate)
{
u8 rate_len;
u8 rate_ex_len;
u8 RateMask = 0x7F;
u8 idx;
unsigned short Found = 0;
u8 NaiveTxRate = TxRate&RateMask;
rate_len = priv->ieee80211->current_network.rates_len;
rate_ex_len = priv->ieee80211->current_network.rates_ex_len;
for (idx = 0; idx < rate_len; idx++) {
if ((priv->ieee80211->current_network.rates[idx] & RateMask) == NaiveTxRate) {
Found = 1;
goto found_rate;
}
}
for (idx = 0; idx < rate_ex_len; idx++) {
if ((priv->ieee80211->current_network.rates_ex[idx] & RateMask) == NaiveTxRate) {
Found = 1;
goto found_rate;
}
}
return Found;
found_rate:
return Found;
}
/*
* Get the Tx rate one degree up form the input rate in the supported rates.
* Return the upgrade rate if it is successed, otherwise return the input rate.
*/
static u8 GetUpgradeTxRate(struct net_device *dev, u8 rate)
{
struct r8180_priv *priv = ieee80211_priv(dev);
u8 UpRate;
/* Upgrade 1 degree. */
switch (rate) {
case 108: /* Up to 54Mbps. */
UpRate = 108;
break;
case 96: /* Up to 54Mbps. */
UpRate = 108;
break;
case 72: /* Up to 48Mbps. */
UpRate = 96;
break;
case 48: /* Up to 36Mbps. */
UpRate = 72;
break;
case 36: /* Up to 24Mbps. */
UpRate = 48;
break;
case 22: /* Up to 18Mbps. */
UpRate = 36;
break;
case 11: /* Up to 11Mbps. */
UpRate = 22;
break;
case 4: /* Up to 5.5Mbps. */
UpRate = 11;
break;
case 2: /* Up to 2Mbps. */
UpRate = 4;
break;
default:
printk("GetUpgradeTxRate(): Input Tx Rate(%d) is undefined!\n", rate);
return rate;
}
/* Check if the rate is valid. */
if (IncludedInSupportedRates(priv, UpRate)) {
return UpRate;
} else {
return rate;
}
return rate;
}
/*
* Get the Tx rate one degree down form the input rate in the supported rates.
* Return the degrade rate if it is successed, otherwise return the input rate.
*/
static u8 GetDegradeTxRate(struct net_device *dev, u8 rate)
{
struct r8180_priv *priv = ieee80211_priv(dev);
u8 DownRate;
/* Upgrade 1 degree. */
switch (rate) {
case 108: /* Down to 48Mbps. */
DownRate = 96;
break;
case 96: /* Down to 36Mbps. */
DownRate = 72;
break;
case 72: /* Down to 24Mbps. */
DownRate = 48;
break;
case 48: /* Down to 18Mbps. */
DownRate = 36;
break;
case 36: /* Down to 11Mbps. */
DownRate = 22;
break;
case 22: /* Down to 5.5Mbps. */
DownRate = 11;
break;
case 11: /* Down to 2Mbps. */
DownRate = 4;
break;
case 4: /* Down to 1Mbps. */
DownRate = 2;
break;
case 2: /* Down to 1Mbps. */
DownRate = 2;
break;
default:
printk("GetDegradeTxRate(): Input Tx Rate(%d) is undefined!\n", rate);
return rate;
}
/* Check if the rate is valid. */
if (IncludedInSupportedRates(priv, DownRate)) {
return DownRate;
} else {
return rate;
}
return rate;
}
/*
* Helper function to determine if specified data rate is
* CCK rate.
*/
static bool MgntIsCckRate(u16 rate)
{
bool bReturn = false;
if ((rate <= 22) && (rate != 12) && (rate != 18)) {
bReturn = true;
}
return bReturn;
}
/*
* Description:
* Tx Power tracking mechanism routine on 87SE.
*/
void TxPwrTracking87SE(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
u8 tmpu1Byte, CurrentThermal, Idx;
char CckTxPwrIdx, OfdmTxPwrIdx;
tmpu1Byte = read_nic_byte(dev, EN_LPF_CAL);
CurrentThermal = (tmpu1Byte & 0xf0) >> 4; /*[ 7:4]: thermal meter indication. */
CurrentThermal = (CurrentThermal > 0x0c) ? 0x0c : CurrentThermal;/* lzm add 080826 */
if (CurrentThermal != priv->ThermalMeter) {
/* Update Tx Power level on each channel. */
for (Idx = 1; Idx < 15; Idx++) {
CckTxPwrIdx = priv->chtxpwr[Idx];
OfdmTxPwrIdx = priv->chtxpwr_ofdm[Idx];
if (CurrentThermal > priv->ThermalMeter) {
/* higher thermal meter. */
CckTxPwrIdx += (CurrentThermal - priv->ThermalMeter) * 2;
OfdmTxPwrIdx += (CurrentThermal - priv->ThermalMeter) * 2;
if (CckTxPwrIdx > 35)
CckTxPwrIdx = 35; /* Force TxPower to maximal index. */
if (OfdmTxPwrIdx > 35)
OfdmTxPwrIdx = 35;
} else {
/* lower thermal meter. */
CckTxPwrIdx -= (priv->ThermalMeter - CurrentThermal) * 2;
OfdmTxPwrIdx -= (priv->ThermalMeter - CurrentThermal) * 2;
if (CckTxPwrIdx < 0)
CckTxPwrIdx = 0;
if (OfdmTxPwrIdx < 0)
OfdmTxPwrIdx = 0;
}
/* Update TxPower level on CCK and OFDM resp. */
priv->chtxpwr[Idx] = CckTxPwrIdx;
priv->chtxpwr_ofdm[Idx] = OfdmTxPwrIdx;
}
/* Update TxPower level immediately. */
rtl8225z2_SetTXPowerLevel(dev, priv->ieee80211->current_network.channel);
}
priv->ThermalMeter = CurrentThermal;
}
static void StaRateAdaptive87SE(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
unsigned long CurrTxokCnt;
u16 CurrRetryCnt;
u16 CurrRetryRate;
unsigned long CurrRxokCnt;
bool bTryUp = false;
bool bTryDown = false;
u8 TryUpTh = 1;
u8 TryDownTh = 2;
u32 TxThroughput;
long CurrSignalStrength;
bool bUpdateInitialGain = false;
u8 u1bOfdm = 0, u1bCck = 0;
char OfdmTxPwrIdx, CckTxPwrIdx;
priv->RateAdaptivePeriod = RATE_ADAPTIVE_TIMER_PERIOD;
CurrRetryCnt = priv->CurrRetryCnt;
CurrTxokCnt = priv->NumTxOkTotal - priv->LastTxokCnt;
CurrRxokCnt = priv->ieee80211->NumRxOkTotal - priv->LastRxokCnt;
CurrSignalStrength = priv->Stats_RecvSignalPower;
TxThroughput = (u32)(priv->NumTxOkBytesTotal - priv->LastTxOKBytes);
priv->LastTxOKBytes = priv->NumTxOkBytesTotal;
priv->CurrentOperaRate = priv->ieee80211->rate / 5;
/* 2 Compute retry ratio. */
if (CurrTxokCnt > 0) {
CurrRetryRate = (u16)(CurrRetryCnt * 100 / CurrTxokCnt);
} else {
/* It may be serious retry. To distinguish serious retry or no packets modified by Bruce */
CurrRetryRate = (u16)(CurrRetryCnt * 100 / 1);
}
priv->LastRetryCnt = priv->CurrRetryCnt;
priv->LastTxokCnt = priv->NumTxOkTotal;
priv->LastRxokCnt = priv->ieee80211->NumRxOkTotal;
priv->CurrRetryCnt = 0;
/* 2No Tx packets, return to init_rate or not? */
if (CurrRetryRate == 0 && CurrTxokCnt == 0) {
/*
* After 9 (30*300ms) seconds in this condition, we try to raise rate.
*/
priv->TryupingCountNoData++;
/* [TRC Dell Lab] Extend raised period from 4.5sec to 9sec, Isaiah 2008-02-15 18:00 */
if (priv->TryupingCountNoData > 30) {
priv->TryupingCountNoData = 0;
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
/* Reset Fail Record */
priv->LastFailTxRate = 0;
priv->LastFailTxRateSS = -200;
priv->FailTxRateCount = 0;
}
goto SetInitialGain;
} else {
priv->TryupingCountNoData = 0; /*Reset trying up times. */
}
/*
* For Netgear case, I comment out the following signal strength estimation,
* which can results in lower rate to transmit when sample is NOT enough (e.g. PING request).
*
* Restructure rate adaptive as the following main stages:
* (1) Add retry threshold in 54M upgrading condition with signal strength.
* (2) Add the mechanism to degrade to CCK rate according to signal strength
* and retry rate.
* (3) Remove all Initial Gain Updates over OFDM rate. To avoid the complicated
* situation, Initial Gain Update is upon on DIG mechanism except CCK rate.
* (4) Add the mechanism of trying to upgrade tx rate.
* (5) Record the information of upping tx rate to avoid trying upping tx rate constantly.
*
*/
/*
* 11Mbps or 36Mbps
* Check more times in these rate(key rates).
*/
if (priv->CurrentOperaRate == 22 || priv->CurrentOperaRate == 72)
TryUpTh += 9;
/*
* Let these rates down more difficult.
*/
if (MgntIsCckRate(priv->CurrentOperaRate) || priv->CurrentOperaRate == 36)
TryDownTh += 1;
/* 1 Adjust Rate. */
if (priv->bTryuping == true) {
/* 2 For Test Upgrading mechanism
* Note:
* Sometimes the throughput is upon on the capability between the AP and NIC,
* thus the low data rate does not improve the performance.
* We randomly upgrade the data rate and check if the retry rate is improved.
*/
/* Upgrading rate did not improve the retry rate, fallback to the original rate. */
if ((CurrRetryRate > 25) && TxThroughput < priv->LastTxThroughput) {
/*Not necessary raising rate, fall back rate. */
bTryDown = true;
} else {
priv->bTryuping = false;
}
} else if (CurrSignalStrength > -47 && (CurrRetryRate < 50)) {
/*
* 2For High Power
*
* Return to highest data rate, if signal strength is good enough.
* SignalStrength threshold(-50dbm) is for RTL8186.
* Revise SignalStrength threshold to -51dbm.
*/
/* Also need to check retry rate for safety, by Bruce, 2007-06-05. */
if (priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate) {
bTryUp = true;
/* Upgrade Tx Rate directly. */
priv->TryupingCount += TryUpTh;
}
} else if (CurrTxokCnt > 9 && CurrTxokCnt < 100 && CurrRetryRate >= 600) {
/*
*2 For Serious Retry
*
* Traffic is not busy but our Tx retry is serious.
*/
bTryDown = true;
/* Let Rate Mechanism to degrade tx rate directly. */
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 108) {
/* 2For 54Mbps */
/* Air Link */
if ((CurrRetryRate > 26) && (priv->LastRetryRate > 25)) {
bTryDown = true;
}
/* Cable Link */
else if ((CurrRetryRate > 17) && (priv->LastRetryRate > 16) && (CurrSignalStrength > -72)) {
bTryDown = true;
}
if (bTryDown && (CurrSignalStrength < -75)) /* cable link */
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 96) {
/* 2For 48Mbps */
/* Air Link */
if (((CurrRetryRate > 48) && (priv->LastRetryRate > 47))) {
bTryDown = true;
} else if (((CurrRetryRate > 21) && (priv->LastRetryRate > 20)) && (CurrSignalStrength > -74)) { /* Cable Link */
/* Down to rate 36Mbps. */
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 8) && (priv->LastRetryRate < 8)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -75)) {
priv->TryDownCountLowData += TryDownTh;
}
} else if (priv->CurrentOperaRate == 72) {
/* 2For 36Mbps */
if ((CurrRetryRate > 43) && (priv->LastRetryRate > 41)) {
/* Down to rate 24Mbps. */
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 15) && (priv->LastRetryRate < 16)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -80))
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 48) {
/* 2For 24Mbps */
/* Air Link */
if (((CurrRetryRate > 63) && (priv->LastRetryRate > 62))) {
bTryDown = true;
} else if (((CurrRetryRate > 33) && (priv->LastRetryRate > 32)) && (CurrSignalStrength > -82)) { /* Cable Link */
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 20) && (priv->LastRetryRate < 21)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
if (bTryDown && (CurrSignalStrength < -82))
priv->TryDownCountLowData += TryDownTh;
} else if (priv->CurrentOperaRate == 36) {
if (((CurrRetryRate > 85) && (priv->LastRetryRate > 86))) {
bTryDown = true;
} else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
bTryDown = true;
priv->TryDownCountLowData += TryDownTh;
} else if ((CurrRetryRate < 22) && (priv->LastRetryRate < 23)) { /* TO DO: need to consider (RSSI) */
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 22) {
/* 2For 11Mbps */
if (CurrRetryRate > 95) {
bTryDown = true;
} else if ((CurrRetryRate < 29) && (priv->LastRetryRate < 30)) { /*TO DO: need to consider (RSSI) */
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 11) {
/* 2For 5.5Mbps */
if (CurrRetryRate > 149) {
bTryDown = true;
} else if ((CurrRetryRate < 60) && (priv->LastRetryRate < 65)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 4) {
/* 2For 2 Mbps */
if ((CurrRetryRate > 99) && (priv->LastRetryRate > 99)) {
bTryDown = true;
} else if ((CurrRetryRate < 65) && (priv->LastRetryRate < 70)) {
bTryUp = true;
}
} else if (priv->CurrentOperaRate == 2) {
/* 2For 1 Mbps */
if ((CurrRetryRate < 70) && (priv->LastRetryRate < 75)) {
bTryUp = true;
}
}
if (bTryUp && bTryDown)
printk("StaRateAdaptive87B(): Tx Rate tried upping and downing simultaneously!\n");
/* 1 Test Upgrading Tx Rate
* Sometimes the cause of the low throughput (high retry rate) is the compatibility between the AP and NIC.
* To test if the upper rate may cause lower retry rate, this mechanism randomly occurs to test upgrading tx rate.
*/
if (!bTryUp && !bTryDown && (priv->TryupingCount == 0) && (priv->TryDownCountLowData == 0)
&& priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate && priv->FailTxRateCount < 2) {
if (jiffies % (CurrRetryRate + 101) == 0) {
bTryUp = true;
priv->bTryuping = true;
}
}
/* 1 Rate Mechanism */
if (bTryUp) {
priv->TryupingCount++;
priv->TryDownCountLowData = 0;
/*
* Check more times if we need to upgrade indeed.
* Because the largest value of pHalData->TryupingCount is 0xFFFF and
* the largest value of pHalData->FailTxRateCount is 0x14,
* this condition will be satisfied at most every 2 min.
*/
if ((priv->TryupingCount > (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount)) ||
(CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping) {
priv->TryupingCount = 0;
/*
* When transferring from CCK to OFDM, DIG is an important issue.
*/
if (priv->CurrentOperaRate == 22)
bUpdateInitialGain = true;
/*
* The difference in throughput between 48Mbps and 36Mbps is 8M.
* So, we must be careful in this rate scale. Isaiah 2008-02-15.
*/
if (((priv->CurrentOperaRate == 72) || (priv->CurrentOperaRate == 48) || (priv->CurrentOperaRate == 36)) &&
(priv->FailTxRateCount > 2))
priv->RateAdaptivePeriod = (RATE_ADAPTIVE_TIMER_PERIOD / 2);
/* (1)To avoid upgrade frequently to the fail tx rate, add the FailTxRateCount into the threshold. */
/* (2)If the signal strength is increased, it may be able to upgrade. */
priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
if (priv->CurrentOperaRate == 36) {
priv->bUpdateARFR = true;
write_nic_word(dev, ARFR, 0x0F8F); /* bypass 12/9/6 */
} else if (priv->bUpdateARFR) {
priv->bUpdateARFR = false;
write_nic_word(dev, ARFR, 0x0FFF); /* set 1M ~ 54Mbps. */
}
/* Update Fail Tx rate and count. */
if (priv->LastFailTxRate != priv->CurrentOperaRate) {
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 0;
priv->LastFailTxRateSS = -200; /* Set lowest power. */
}
}
} else {
if (priv->TryupingCount > 0)
priv->TryupingCount--;
}
if (bTryDown) {
priv->TryDownCountLowData++;
priv->TryupingCount = 0;
/* Check if Tx rate can be degraded or Test trying upgrading should fallback. */
if (priv->TryDownCountLowData > TryDownTh || priv->bTryuping) {
priv->TryDownCountLowData = 0;
priv->bTryuping = false;
/* Update fail information. */
if (priv->LastFailTxRate == priv->CurrentOperaRate) {
priv->FailTxRateCount++;
/* Record the Tx fail rate signal strength. */
if (CurrSignalStrength > priv->LastFailTxRateSS)
priv->LastFailTxRateSS = CurrSignalStrength;
} else {
priv->LastFailTxRate = priv->CurrentOperaRate;
priv->FailTxRateCount = 1;
priv->LastFailTxRateSS = CurrSignalStrength;
}
priv->CurrentOperaRate = GetDegradeTxRate(dev, priv->CurrentOperaRate);
/* Reduce chariot training time at weak signal strength situation. SD3 ED demand. */
if ((CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72)) {
priv->CurrentOperaRate = 72;
}
if (priv->CurrentOperaRate == 36) {
priv->bUpdateARFR = true;
write_nic_word(dev, ARFR, 0x0F8F); /* bypass 12/9/6 */
} else if (priv->bUpdateARFR) {
priv->bUpdateARFR = false;
write_nic_word(dev, ARFR, 0x0FFF); /* set 1M ~ 54Mbps. */
}
/*
* When it is CCK rate, it may need to update initial gain to receive lower power packets.
*/
if (MgntIsCckRate(priv->CurrentOperaRate)) {
bUpdateInitialGain = true;
}
}
} else {
if (priv->TryDownCountLowData > 0)
priv->TryDownCountLowData--;
}
/*
* Keep the Tx fail rate count to equal to 0x15 at most.
* Reduce the fail count at least to 10 sec if tx rate is tending stable.
*/
if (priv->FailTxRateCount >= 0x15 ||
(!bTryUp && !bTryDown && priv->TryDownCountLowData == 0 && priv->TryupingCount && priv->FailTxRateCount > 0x6)) {
priv->FailTxRateCount--;
}
OfdmTxPwrIdx = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel];
/* Mac0x9e increase 2 level in 36M~18M situation */
if ((priv->CurrentOperaRate < 96) && (priv->CurrentOperaRate > 22)) {
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
/* case 1: Never enter High power */
if (u1bCck == CckTxPwrIdx) {
if (u1bOfdm != (OfdmTxPwrIdx + 2)) {
priv->bEnhanceTxPwr = true;
u1bOfdm = ((u1bOfdm + 2) > 35) ? 35 : (u1bOfdm + 2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
} else if (u1bCck < CckTxPwrIdx) {
/* case 2: enter high power */
if (!priv->bEnhanceTxPwr) {
priv->bEnhanceTxPwr = true;
u1bOfdm = ((u1bOfdm + 2) > 35) ? 35 : (u1bOfdm + 2);
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
}
} else if (priv->bEnhanceTxPwr) { /* 54/48/11/5.5/2/1 */
u1bCck = read_nic_byte(dev, CCK_TXAGC);
u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);
/* case 1: Never enter High power */
if (u1bCck == CckTxPwrIdx) {
priv->bEnhanceTxPwr = false;
write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
}
/* case 2: enter high power */
else if (u1bCck < CckTxPwrIdx) {
priv->bEnhanceTxPwr = false;
u1bOfdm = ((u1bOfdm - 2) > 0) ? (u1bOfdm - 2) : 0;
write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
}
}
/*
* We need update initial gain when we set tx rate "from OFDM to CCK" or
* "from CCK to OFDM".
*/
SetInitialGain:
if (bUpdateInitialGain) {
if (MgntIsCckRate(priv->CurrentOperaRate)) { /* CCK */
if (priv->InitialGain > priv->RegBModeGainStage) {
priv->InitialGainBackUp = priv->InitialGain;
if (CurrSignalStrength < -85) /* Low power, OFDM [0x17] = 26. */
/* SD3 SYs suggest that CurrSignalStrength < -65, ofdm 0x17=26. */
priv->InitialGain = priv->RegBModeGainStage;
else if (priv->InitialGain > priv->RegBModeGainStage + 1)
priv->InitialGain -= 2;
else
priv->InitialGain--;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n", priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
} else { /* OFDM */
if (priv->InitialGain < 4) {
priv->InitialGainBackUp = priv->InitialGain;
priv->InitialGain++;
printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n", priv->InitialGain, priv->CurrentOperaRate);
UpdateInitialGain(dev);
}
}
}
/* Record the related info */
priv->LastRetryRate = CurrRetryRate;
priv->LastTxThroughput = TxThroughput;
priv->ieee80211->rate = priv->CurrentOperaRate * 5;
}
void rtl8180_rate_adapter(struct work_struct *work)
{
struct delayed_work *dwork = to_delayed_work(work);
struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, rate_adapter_wq);
struct net_device *dev = ieee->dev;
StaRateAdaptive87SE(dev);
}
void timer_rate_adaptive(unsigned long data)
{
struct r8180_priv *priv = ieee80211_priv((struct net_device *)data);
if (!priv->up) {
return;
}
if ((priv->ieee80211->iw_mode != IW_MODE_MASTER)
&& (priv->ieee80211->state == IEEE80211_LINKED) &&
(priv->ForcedDataRate == 0)) {
queue_work(priv->ieee80211->wq, (void *)&priv->ieee80211->rate_adapter_wq);
}
priv->rateadapter_timer.expires = jiffies + MSECS(priv->RateAdaptivePeriod);
add_timer(&priv->rateadapter_timer);
}
void SwAntennaDiversityRxOk8185(struct net_device *dev, u8 SignalStrength)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
priv->AdRxOkCnt++;
if (priv->AdRxSignalStrength != -1) {
priv->AdRxSignalStrength = ((priv->AdRxSignalStrength * 7) + (SignalStrength * 3)) / 10;
} else { /* Initialization case. */
priv->AdRxSignalStrength = SignalStrength;
}
if (priv->LastRxPktAntenna) /* Main antenna. */
priv->AdMainAntennaRxOkCnt++;
else /* Aux antenna. */
priv->AdAuxAntennaRxOkCnt++;
}
/* Change Antenna Switch. */
bool SetAntenna8185(struct net_device *dev, u8 u1bAntennaIndex)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
bool bAntennaSwitched = false;
switch (u1bAntennaIndex) {
case 0:
/* Mac register, main antenna */
write_nic_byte(dev, ANTSEL, 0x03);
/* base band */
write_phy_cck(dev, 0x11, 0x9b); /* Config CCK RX antenna. */
write_phy_ofdm(dev, 0x0d, 0x5c); /* Config OFDM RX antenna. */
bAntennaSwitched = true;
break;
case 1:
/* Mac register, aux antenna */
write_nic_byte(dev, ANTSEL, 0x00);
/* base band */
write_phy_cck(dev, 0x11, 0xbb); /* Config CCK RX antenna. */
write_phy_ofdm(dev, 0x0d, 0x54); /* Config OFDM RX antenna. */
bAntennaSwitched = true;
break;
default:
printk("SetAntenna8185: unknown u1bAntennaIndex(%d)\n", u1bAntennaIndex);
break;
}
if (bAntennaSwitched)
priv->CurrAntennaIndex = u1bAntennaIndex;
return bAntennaSwitched;
}
/* Toggle Antenna switch. */
bool SwitchAntenna(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
bool bResult;
if (priv->CurrAntennaIndex == 0) {
bResult = SetAntenna8185(dev, 1);
} else {
bResult = SetAntenna8185(dev, 0);
}
return bResult;
}
/*
* Engine of SW Antenna Diversity mechanism.
* Since 8187 has no Tx part information,
* this implementation is only dependend on Rx part information.
*/
void SwAntennaDiversity(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
bool bSwCheckSS = false;
if (bSwCheckSS) {
priv->AdTickCount++;
printk("(1) AdTickCount: %d, AdCheckPeriod: %d\n",
priv->AdTickCount, priv->AdCheckPeriod);
printk("(2) AdRxSignalStrength: %ld, AdRxSsThreshold: %ld\n",
priv->AdRxSignalStrength, priv->AdRxSsThreshold);
}
/* Case 1. No Link. */
if (priv->ieee80211->state != IEEE80211_LINKED) {
priv->bAdSwitchedChecking = false;
/* I switch antenna here to prevent any one of antenna is broken before link established, 2006.04.18, by rcnjko.. */
SwitchAntenna(dev);
/* Case 2. Linked but no packet receive.d */
} else if (priv->AdRxOkCnt == 0) {
priv->bAdSwitchedChecking = false;
SwitchAntenna(dev);
/* Case 3. Evaluate last antenna switch action and undo it if necessary. */
} else if (priv->bAdSwitchedChecking == true) {
priv->bAdSwitchedChecking = false;
/* Adjust Rx signal strength threshold. */
priv->AdRxSsThreshold = (priv->AdRxSignalStrength + priv->AdRxSsBeforeSwitched) / 2;
priv->AdRxSsThreshold = (priv->AdRxSsThreshold > priv->AdMaxRxSsThreshold) ?
priv->AdMaxRxSsThreshold : priv->AdRxSsThreshold;
if (priv->AdRxSignalStrength < priv->AdRxSsBeforeSwitched) {
/* Rx signal strength is not improved after we swtiched antenna. => Swich back. */
/* Increase Antenna Diversity checking period due to bad decision. */
priv->AdCheckPeriod *= 2;
/* Increase Antenna Diversity checking period. */
if (priv->AdCheckPeriod > priv->AdMaxCheckPeriod)
priv->AdCheckPeriod = priv->AdMaxCheckPeriod;
/* Wrong decision => switch back. */
SwitchAntenna(dev);
} else {
/* Rx Signal Strength is improved. */
/* Reset Antenna Diversity checking period to its min value. */
priv->AdCheckPeriod = priv->AdMinCheckPeriod;
}
}
/* Case 4. Evaluate if we shall switch antenna now. */
/* Cause Table Speed is very fast in TRC Dell Lab, we check it every time. */
else {
priv->AdTickCount = 0;
/*
* <Roger_Notes> We evaluate RxOk counts for each antenna first and than
* evaluate signal strength.
* The following operation can overcome the disability of CCA on both two antennas
* When signal strength was extremely low or high.
* 2008.01.30.
*/
/*
* Evaluate RxOk count from each antenna if we shall switch default antenna now.
*/
if ((priv->AdMainAntennaRxOkCnt < priv->AdAuxAntennaRxOkCnt)
&& (priv->CurrAntennaIndex == 0)) {
/* We set Main antenna as default but RxOk count was less than Aux ones. */
/* Switch to Aux antenna. */
SwitchAntenna(dev);
priv->bHWAdSwitched = true;
} else if ((priv->AdAuxAntennaRxOkCnt < priv->AdMainAntennaRxOkCnt)
&& (priv->CurrAntennaIndex == 1)) {
/* We set Aux antenna as default but RxOk count was less than Main ones. */
/* Switch to Main antenna. */
SwitchAntenna(dev);
priv->bHWAdSwitched = true;
} else {
/* Default antenna is better. */
/* Still need to check current signal strength. */
priv->bHWAdSwitched = false;
}
/*
* <Roger_Notes> We evaluate Rx signal strength ONLY when default antenna
* didn't change by HW evaluation.
* 2008.02.27.
*
* [TRC Dell Lab] SignalStrength is inaccuracy. Isaiah 2008-03-05
* For example, Throughput of aux is better than main antenna(about 10M v.s 2M),
* but AdRxSignalStrength is less than main.
* Our guess is that main antenna have lower throughput and get many change
* to receive more CCK packets(ex.Beacon) which have stronger SignalStrength.
*/
if ((!priv->bHWAdSwitched) && (bSwCheckSS)) {
/* Evaluate Rx signal strength if we shall switch antenna now. */
if (priv->AdRxSignalStrength < priv->AdRxSsThreshold) {
/* Rx signal strength is weak => Switch Antenna. */
priv->AdRxSsBeforeSwitched = priv->AdRxSignalStrength;
priv->bAdSwitchedChecking = true;
SwitchAntenna(dev);
} else {
/* Rx signal strength is OK. */
priv->bAdSwitchedChecking = false;
/* Increase Rx signal strength threshold if necessary. */
if ((priv->AdRxSignalStrength > (priv->AdRxSsThreshold + 10)) && /* Signal is much stronger than current threshold */
priv->AdRxSsThreshold <= priv->AdMaxRxSsThreshold) { /* Current threhold is not yet reach upper limit. */
priv->AdRxSsThreshold = (priv->AdRxSsThreshold + priv->AdRxSignalStrength) / 2;
priv->AdRxSsThreshold = (priv->AdRxSsThreshold > priv->AdMaxRxSsThreshold) ?
priv->AdMaxRxSsThreshold : priv->AdRxSsThreshold;/* +by amy 080312 */
}
/* Reduce Antenna Diversity checking period if possible. */
if (priv->AdCheckPeriod > priv->AdMinCheckPeriod)
priv->AdCheckPeriod /= 2;
}
}
}
/* Reset antenna diversity Rx related statistics. */
priv->AdRxOkCnt = 0;
priv->AdMainAntennaRxOkCnt = 0;
priv->AdAuxAntennaRxOkCnt = 0;
}
/* Return TRUE if we shall perform Tx Power Tracking Mechanism, FALSE otherwise. */
bool CheckTxPwrTracking(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
if (!priv->bTxPowerTrack)
return false;
/* if 87SE is in High Power , don't do Tx Power Tracking. asked by SD3 ED. 2008-08-08 Isaiah */
if (priv->bToUpdateTxPwr)
return false;
return true;
}
/* Timer callback function of SW Antenna Diversity. */
void SwAntennaDiversityTimerCallback(struct net_device *dev)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
RT_RF_POWER_STATE rtState;
/* We do NOT need to switch antenna while RF is off. */
rtState = priv->eRFPowerState;
do {
if (rtState == eRfOff) {
break;
} else if (rtState == eRfSleep) {
/* Don't access BB/RF under Disable PLL situation. */
break;
}
SwAntennaDiversity(dev);
} while (false);
if (priv->up) {
priv->SwAntennaDiversityTimer.expires = jiffies + MSECS(ANTENNA_DIVERSITY_TIMER_PERIOD);
add_timer(&priv->SwAntennaDiversityTimer);
}
}