diff options
Diffstat (limited to 'drivers/staging/rtl8187se/r8180_dm.c')
| -rw-r--r-- | drivers/staging/rtl8187se/r8180_dm.c | 1141 |
1 files changed, 1141 insertions, 0 deletions
diff --git a/drivers/staging/rtl8187se/r8180_dm.c b/drivers/staging/rtl8187se/r8180_dm.c new file mode 100644 index 00000000..b8f2ba01 --- /dev/null +++ b/drivers/staging/rtl8187se/r8180_dm.c @@ -0,0 +1,1141 @@ +#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. + */ +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. + */ +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. + */ +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); + +} + +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. + */ +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. + */ + +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. + */ + +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; +} +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); + } +} + |