From aada7fdd8dff89a2f51ccc0d20efa69f0756d90b Mon Sep 17 00:00:00 2001 From: Andrew Miller Date: Thu, 15 Mar 2012 15:05:18 -0400 Subject: [PATCH] Staging: rtl8187se: r8180_dm.c: Fix brackets Fix brackets that where out of place and removed brackets that were not needed Signed-off-by: Andrew Miller Signed-off-by: Greg Kroah-Hartman --- drivers/staging/rtl8187se/r8180_dm.c | 531 +++++++++------------------ 1 file changed, 166 insertions(+), 365 deletions(-) diff --git a/drivers/staging/rtl8187se/r8180_dm.c b/drivers/staging/rtl8187se/r8180_dm.c index 80fd71cb53e5..97e4fefe8422 100644 --- a/drivers/staging/rtl8187se/r8180_dm.c +++ b/drivers/staging/rtl8187se/r8180_dm.c @@ -17,14 +17,10 @@ bool CheckHighPower(struct net_device *dev) struct ieee80211_device *ieee = priv->ieee80211; if(!priv->bRegHighPowerMechanism) - { return false; - } if(ieee->state == IEEE80211_LINKED_SCANNING) - { return false; - } return true; } @@ -70,8 +66,7 @@ DoTxHighPower( // printk("DoTxHighPower() - UndecoratedSmoothedSS:%d, CurCCKRSSI = %d , bCurCCKPkt= %d \n", priv->UndecoratedSmoothedSS, priv->CurCCKRSSI, priv->bCurCCKPkt ); if((priv->UndecoratedSmoothedSS > HiPwrUpperTh) || - (priv->bCurCCKPkt && (priv->CurCCKRSSI > RSSIHiPwrUpperTh))) - { + (priv->bCurCCKPkt && (priv->CurCCKRSSI > RSSIHiPwrUpperTh))) { // Stevenl suggested that degrade 8dbm in high power sate. 2007-12-04 Isaiah // printk("=====>DoTxHighPower() - High Power - UndecoratedSmoothedSS:%d, HiPwrUpperTh = %d \n", priv->UndecoratedSmoothedSS, HiPwrUpperTh ); @@ -79,8 +74,7 @@ DoTxHighPower( u1bTmp= read_nic_byte(dev, CCK_TXAGC); // If it never enter High Power. - if( CckTxPwrIdx == u1bTmp) - { + if( CckTxPwrIdx == u1bTmp) { u1bTmp = (u1bTmp > 16) ? (u1bTmp -16): 0; // 8dbm write_nic_byte(dev, CCK_TXAGC, u1bTmp); @@ -89,26 +83,21 @@ DoTxHighPower( write_nic_byte(dev, OFDM_TXAGC, u1bTmp); } - } - else if((priv->UndecoratedSmoothedSS < HiPwrLowerTh) && - (!priv->bCurCCKPkt || priv->CurCCKRSSI < RSSIHiPwrLowerTh)) - { + } else if((priv->UndecoratedSmoothedSS < HiPwrLowerTh) && + (!priv->bCurCCKPkt || priv->CurCCKRSSI < RSSIHiPwrLowerTh)) { // printk("DoTxHighPower() - lower Power - UndecoratedSmoothedSS:%d, HiPwrUpperTh = %d \n", priv->UndecoratedSmoothedSS, HiPwrLowerTh ); - if(priv->bToUpdateTxPwr) - { + if(priv->bToUpdateTxPwr) { priv->bToUpdateTxPwr = false; //SD3 required. u1bTmp= read_nic_byte(dev, CCK_TXAGC); - if(u1bTmp < CckTxPwrIdx) - { + if(u1bTmp < CckTxPwrIdx) { //u1bTmp = ((u1bTmp+16) > 35) ? 35: (u1bTmp+16); // 8dbm //write_nic_byte(dev, CCK_TXAGC, u1bTmp); write_nic_byte(dev, CCK_TXAGC, CckTxPwrIdx); } u1bTmp= read_nic_byte(dev, OFDM_TXAGC); - if(u1bTmp < OfdmTxPwrIdx) - { + if(u1bTmp < OfdmTxPwrIdx) { //u1bTmp = ((u1bTmp+16) > 35) ? 35: (u1bTmp+16); // 8dbm //write_nic_byte(dev, OFDM_TXAGC, u1bTmp); write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx); @@ -193,29 +182,25 @@ DIG_Zebra( // printk("DIG**********OFDM False Alarm: %#X \n",OFDMFalseAlarm); // The number of initial gain steps is different, by Bruce, 2007-04-13. - if (priv->InitialGain == 0 ) //autoDIG - { // Advised from SD3 DZ + 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; - } + // Advised from SD3 DZ + OfdmFA1 = 0x20; #if 1 //lzm reserved 080826 AwakePeriodIn2Sec = (2000-priv ->DozePeriodInPast2Sec); //printk("&&& DozePeriod=%d AwakePeriod=%d\n", priv->DozePeriodInPast2Sec, AwakePeriodIn2Sec); priv ->DozePeriodInPast2Sec=0; - if(AwakePeriodIn2Sec) - { + if(AwakePeriodIn2Sec) { //RT_TRACE(COMP_DIG, DBG_TRACE, ("DIG: AwakePeriodIn2Sec(%d) - FATh(0x%X , 0x%X) ->",AwakePeriodIn2Sec, OfdmFA1, OfdmFA2)); // adjuest DIG threshold. OfdmFA1 = (u16)((OfdmFA1*AwakePeriodIn2Sec) / 2000) ; OfdmFA2 = (u16)((OfdmFA2*AwakePeriodIn2Sec) / 2000) ; //RT_TRACE(COMP_DIG, DBG_TRACE, ("( 0x%X , 0x%X)\n", OfdmFA1, OfdmFA2)); - } - else - { + } else { ;//RT_TRACE(COMP_DIG, DBG_WARNING, ("ERROR!! AwakePeriodIn2Sec should not be ZERO!!\n")); } #endif @@ -223,16 +208,12 @@ DIG_Zebra( InitialGainStep = 8; LowestGainStage = priv->RegBModeGainStage; // Lowest gain stage. - if (OFDMFalseAlarm > OfdmFA1) - { - if (OFDMFalseAlarm > OfdmFA2) - { + if (OFDMFalseAlarm > OfdmFA1) { + if (OFDMFalseAlarm > OfdmFA2) { priv->DIG_NumberFallbackVote++; - if (priv->DIG_NumberFallbackVote >1) - { + if (priv->DIG_NumberFallbackVote >1) { //serious OFDM False Alarm, need fallback - if (priv->InitialGain < InitialGainStep) - { + if (priv->InitialGain < InitialGainStep) { priv->InitialGainBackUp= priv->InitialGain; priv->InitialGain = (priv->InitialGain + 1); @@ -243,24 +224,18 @@ DIG_Zebra( priv->DIG_NumberFallbackVote = 0; priv->DIG_NumberUpgradeVote=0; } - } - else - { + } else { if (priv->DIG_NumberFallbackVote) priv->DIG_NumberFallbackVote--; } priv->DIG_NumberUpgradeVote=0; - } - else - { + } 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) - { + 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); @@ -317,18 +292,14 @@ IncludedInSupportedRates( 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 ) - { + 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 ) - { + for( idx=0; idx< rate_ex_len; idx++ ) { + if( (priv->ieee80211->current_network.rates_ex[idx] & RateMask) == NaiveTxRate ) { Found = 1; goto found_rate; } @@ -354,8 +325,7 @@ GetUpgradeTxRate( u8 UpRate; // Upgrade 1 degree. - switch(rate) - { + switch(rate) { case 108: // Up to 54Mbps. UpRate = 108; break; @@ -397,13 +367,10 @@ GetUpgradeTxRate( return rate; } // Check if the rate is valid. - if(IncludedInSupportedRates(priv, UpRate)) - { + if(IncludedInSupportedRates(priv, UpRate)) { // printk("GetUpgradeTxRate(): GetUpgrade Tx rate(%d) from %d !\n", UpRate, priv->CurrentOperaRate); return UpRate; - } - else - { + } else { //printk("GetUpgradeTxRate(): Tx rate (%d) is not in supported rates\n", UpRate); return rate; } @@ -425,8 +392,7 @@ GetDegradeTxRate( u8 DownRate; // Upgrade 1 degree. - switch(rate) - { + switch(rate) { case 108: // Down to 48Mbps. DownRate = 96; break; @@ -468,13 +434,10 @@ GetDegradeTxRate( return rate; } // Check if the rate is valid. - if(IncludedInSupportedRates(priv, DownRate)) - { + if(IncludedInSupportedRates(priv, DownRate)) { // printk("GetDegradeTxRate(): GetDegrade Tx rate(%d) from %d!\n", DownRate, priv->CurrentOperaRate); return DownRate; - } - else - { + } else { //printk("GetDegradeTxRate(): Tx rate (%d) is not in supported rates\n", DownRate); return rate; } @@ -492,8 +455,7 @@ MgntIsCckRate( { bool bReturn = false; - if((rate <= 22) && (rate != 12) && (rate != 18)) - { + if((rate <= 22) && (rate != 12) && (rate != 18)) { bReturn = true; } @@ -520,18 +482,16 @@ TxPwrTracking87SE( //printk("TxPwrTracking87SE(): CurrentThermal(%d)\n", CurrentThermal); - if( CurrentThermal != priv->ThermalMeter) - { + if( CurrentThermal != priv->ThermalMeter) { // printk("TxPwrTracking87SE(): Thermal meter changed!!!\n"); // Update Tx Power level on each channel. - for(Idx = 1; Idx<15; Idx++) - { + for(Idx = 1; Idx<15; Idx++) { CckTxPwrIdx = priv->chtxpwr[Idx]; OfdmTxPwrIdx = priv->chtxpwr_ofdm[Idx]; - if( CurrentThermal > priv->ThermalMeter ) - { // higher thermal meter. + if( CurrentThermal > priv->ThermalMeter ) { + // higher thermal meter. CckTxPwrIdx += (CurrentThermal - priv->ThermalMeter)*2; OfdmTxPwrIdx += (CurrentThermal - priv->ThermalMeter)*2; @@ -539,9 +499,8 @@ TxPwrTracking87SE( CckTxPwrIdx = 35; // Force TxPower to maximal index. if(OfdmTxPwrIdx >35) OfdmTxPwrIdx = 35; - } - else - { // lower thermal meter. + } else { + // lower thermal meter. CckTxPwrIdx -= (priv->ThermalMeter - CurrentThermal)*2; OfdmTxPwrIdx -= (priv->ThermalMeter - CurrentThermal)*2; @@ -594,12 +553,10 @@ StaRateAdaptive87SE( priv->CurrentOperaRate = priv->ieee80211->rate/5; //printk("priv->CurrentOperaRate is %d\n",priv->CurrentOperaRate); //2 Compute retry ratio. - if (CurrTxokCnt>0) - { + if (CurrTxokCnt>0) { CurrRetryRate = (u16)(CurrRetryCnt*100/CurrTxokCnt); - } - else - { // It may be serious retry. To distinguish serious retry or no packets modified by Bruce + } else { + // It may be serious retry. To distinguish serious retry or no packets modified by Bruce CurrRetryRate = (u16)(CurrRetryCnt*100/1); } @@ -622,8 +579,7 @@ StaRateAdaptive87SE( priv->CurrRetryCnt = 0; //2No Tx packets, return to init_rate or not? - if (CurrRetryRate==0 && CurrTxokCnt == 0) - { + if (CurrRetryRate==0 && CurrTxokCnt == 0) { // //After 9 (30*300ms) seconds in this condition, we try to raise rate. // @@ -631,8 +587,7 @@ StaRateAdaptive87SE( // printk("No Tx packets, TryupingCountNoData(%d)\n", priv->TryupingCountNoData); //[TRC Dell Lab] Extend raised period from 4.5sec to 9sec, Isaiah 2008-02-15 18:00 - if (priv->TryupingCountNoData>30) - { + if (priv->TryupingCountNoData>30) { priv->TryupingCountNoData = 0; priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate); // Reset Fail Record @@ -641,9 +596,7 @@ StaRateAdaptive87SE( priv->FailTxRateCount = 0; } goto SetInitialGain; - } - else - { + } else { priv->TryupingCountNoData=0; //Reset trying up times. } @@ -671,20 +624,15 @@ StaRateAdaptive87SE( // 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) - { + if (priv->bTryuping == true) { //2 For Test Upgrading mechanism // Note: // Sometimes the throughput is upon on the capability bwtween the AP and NIC, @@ -692,21 +640,16 @@ StaRateAdaptive87SE( // 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) - { + if ( (CurrRetryRate > 25) && TxThroughput < priv->LastTxThroughput) { //Not necessary raising rate, fall back rate. bTryDown = true; //printk("case1-1: Not necessary raising rate, fall back rate....\n"); //printk("case1-1: pMgntInfo->CurrentOperaRate =%d, TxThroughput = %d, LastThroughput = %d\n", // priv->CurrentOperaRate, TxThroughput, priv->LastTxThroughput); - } - else - { + } else { priv->bTryuping = false; } - } - else if (CurrSignalStrength > -47 && (CurrRetryRate < 50)) - { + } else if (CurrSignalStrength > -47 && (CurrRetryRate < 50)) { //2For High Power // // Added by Roger, 2007.04.09. @@ -715,17 +658,14 @@ StaRateAdaptive87SE( // 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 ) - { + if(priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate ) { bTryUp = true; // Upgrade Tx Rate directly. priv->TryupingCount += TryUpTh; } // printk("case2: StaRateAdaptive87SE: Power(%d) is high enough!!. \n", CurrSignalStrength); - } - else if(CurrTxokCnt > 9 && CurrTxokCnt< 100 && CurrRetryRate >= 600) - { + } else if(CurrTxokCnt > 9 && CurrTxokCnt< 100 && CurrRetryRate >= 600) { //2 For Serious Retry // // Traffic is not busy but our Tx retry is serious. @@ -734,208 +674,147 @@ StaRateAdaptive87SE( // Let Rate Mechanism to degrade tx rate directly. priv->TryDownCountLowData += TryDownTh; // printk("case3: RA: Tx Retry is serious. Degrade Tx Rate to %d directly...\n", priv->CurrentOperaRate); - } - else if ( priv->CurrentOperaRate == 108 ) - { + } else if ( priv->CurrentOperaRate == 108 ) { //2For 54Mbps // Air Link - if ( (CurrRetryRate>26)&&(priv->LastRetryRate>25)) + if ( (CurrRetryRate>26)&&(priv->LastRetryRate>25)) { // if ( (CurrRetryRate>40)&&(priv->LastRetryRate>39)) - { //Down to rate 48Mbps. bTryDown = true; } // Cable Link - else if ( (CurrRetryRate>17)&&(priv->LastRetryRate>16) && (CurrSignalStrength > -72)) + else if ( (CurrRetryRate>17)&&(priv->LastRetryRate>16) && (CurrSignalStrength > -72)) { // else if ( (CurrRetryRate>17)&&(priv->LastRetryRate>16) && (CurrSignalStrength > -72)) - { //Down to rate 48Mbps. bTryDown = true; } if(bTryDown && (CurrSignalStrength < -75)) //cable link - { priv->TryDownCountLowData += TryDownTh; - } //printk("case4---54M \n"); } - else if ( priv->CurrentOperaRate == 96 ) - { + else if ( priv->CurrentOperaRate == 96 ) { //2For 48Mbps //Air Link - if ( ((CurrRetryRate>48) && (priv->LastRetryRate>47))) + if ( ((CurrRetryRate>48) && (priv->LastRetryRate>47))) { // if ( ((CurrRetryRate>65) && (priv->LastRetryRate>64))) - - { //Down to rate 36Mbps. bTryDown = true; - } - //Cable Link - else if ( ((CurrRetryRate>21) && (priv->LastRetryRate>20)) && (CurrSignalStrength > -74)) - { + } 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 )) + } else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) { // else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 )) - { bTryDown = true; priv->TryDownCountLowData += TryDownTh; - } - else if ( (CurrRetryRate<8) && (priv->LastRetryRate<8) ) //TO DO: need to consider (RSSI) + } else if ( (CurrRetryRate<8) && (priv->LastRetryRate<8) ) { //TO DO: need to consider (RSSI) // else if ( (CurrRetryRate<28) && (priv->LastRetryRate<8) ) - { bTryUp = true; } - if(bTryDown && (CurrSignalStrength < -75)) - { + if(bTryDown && (CurrSignalStrength < -75)){ priv->TryDownCountLowData += TryDownTh; } //printk("case5---48M \n"); - } - else if ( priv->CurrentOperaRate == 72 ) - { + } else if ( priv->CurrentOperaRate == 72 ) { //2For 36Mbps - if ( (CurrRetryRate>43) && (priv->LastRetryRate>41)) + if ( (CurrRetryRate>43) && (priv->LastRetryRate>41)) { // if ( (CurrRetryRate>60) && (priv->LastRetryRate>59)) - { //Down to rate 24Mbps. bTryDown = true; - } - else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) + } else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) { // else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 )) - { bTryDown = true; priv->TryDownCountLowData += TryDownTh; - } - else if ( (CurrRetryRate<15) && (priv->LastRetryRate<16)) //TO DO: need to consider (RSSI) + } else if ( (CurrRetryRate<15) && (priv->LastRetryRate<16)) { //TO DO: need to consider (RSSI) // else if ( (CurrRetryRate<35) && (priv->LastRetryRate<36)) - { bTryUp = true; } if(bTryDown && (CurrSignalStrength < -80)) - { priv->TryDownCountLowData += TryDownTh; - } + //printk("case6---36M \n"); - } - else if ( priv->CurrentOperaRate == 48 ) - { + } else if ( priv->CurrentOperaRate == 48 ) { //2For 24Mbps // Air Link - if ( ((CurrRetryRate>63) && (priv->LastRetryRate>62))) + if ( ((CurrRetryRate>63) && (priv->LastRetryRate>62))) { // if ( ((CurrRetryRate>83) && (priv->LastRetryRate>82))) - { //Down to rate 18Mbps. bTryDown = true; - } - //Cable Link - else if ( ((CurrRetryRate>33) && (priv->LastRetryRate>32)) && (CurrSignalStrength > -82) ) + } else if ( ((CurrRetryRate>33) && (priv->LastRetryRate>32)) && (CurrSignalStrength > -82) ) { //Cable Link // else if ( ((CurrRetryRate>50) && (priv->LastRetryRate>49)) && (CurrSignalStrength > -82) ) - { //Down to rate 18Mbps. bTryDown = true; - } - else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) + } else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) { // else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 )) - - { bTryDown = true; priv->TryDownCountLowData += TryDownTh; - } - else if ( (CurrRetryRate<20) && (priv->LastRetryRate<21)) //TO DO: need to consider (RSSI) + } else if ( (CurrRetryRate<20) && (priv->LastRetryRate<21)) { //TO DO: need to consider (RSSI) // else if ( (CurrRetryRate<40) && (priv->LastRetryRate<41)) - { bTryUp = true; } if(bTryDown && (CurrSignalStrength < -82)) - { priv->TryDownCountLowData += TryDownTh; - } + //printk("case7---24M \n"); - } - else if ( priv->CurrentOperaRate == 36 ) - { + } else if ( priv->CurrentOperaRate == 36 ) { //2For 18Mbps // original (109, 109) //[TRC Dell Lab] (90, 91), Isaiah 2008-02-18 23:24 // (85, 86), Isaiah 2008-02-18 24:00 - if ( ((CurrRetryRate>85) && (priv->LastRetryRate>86))) + if ( ((CurrRetryRate>85) && (priv->LastRetryRate>86))) { // if ( ((CurrRetryRate>115) && (priv->LastRetryRate>116))) - { //Down to rate 11Mbps. bTryDown = true; - } - //[TRC Dell Lab] Isaiah 2008-02-18 23:24 - else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) + + //[TRC Dell Lab] Isaiah 2008-02-18 23:24 + } else if((CurrRetryRate> (priv->LastRetryRate + 50 )) && (priv->FailTxRateCount >2 )) { // else if((CurrRetryRate> (priv->LastRetryRate + 70 )) && (priv->FailTxRateCount >2 )) - { bTryDown = true; priv->TryDownCountLowData += TryDownTh; - } - else if ( (CurrRetryRate<22) && (priv->LastRetryRate<23)) //TO DO: need to consider (RSSI) + } else if ( (CurrRetryRate<22) && (priv->LastRetryRate<23)) { //TO DO: need to consider (RSSI) // else if ( (CurrRetryRate<42) && (priv->LastRetryRate<43)) - { bTryUp = true; } //printk("case8---18M \n"); - } - else if ( priv->CurrentOperaRate == 22 ) - { + } else if ( priv->CurrentOperaRate == 22 ) { //2For 11Mbps - if (CurrRetryRate>95) + if (CurrRetryRate>95) { // if (CurrRetryRate>155) - { bTryDown = true; } - else if ( (CurrRetryRate<29) && (priv->LastRetryRate <30) )//TO DO: need to consider (RSSI) + else if ( (CurrRetryRate<29) && (priv->LastRetryRate <30) ) { //TO DO: need to consider (RSSI) // else if ( (CurrRetryRate<49) && (priv->LastRetryRate <50) ) - { bTryUp = true; - } - //printk("case9---11M \n"); } - else if ( priv->CurrentOperaRate == 11 ) - { + //printk("case9---11M \n"); + } else if ( priv->CurrentOperaRate == 11 ) { //2For 5.5Mbps - if (CurrRetryRate>149) + if (CurrRetryRate>149) { // if (CurrRetryRate>189) - { bTryDown = true; - } - else if ( (CurrRetryRate<60) && (priv->LastRetryRate < 65)) + } else if ( (CurrRetryRate<60) && (priv->LastRetryRate < 65)) { // else if ( (CurrRetryRate<80) && (priv->LastRetryRate < 85)) - - { bTryUp = true; - } - //printk("case10---5.5M \n"); } - else if ( priv->CurrentOperaRate == 4 ) - { + //printk("case10---5.5M \n"); + } else if ( priv->CurrentOperaRate == 4 ) { //2For 2 Mbps - if((CurrRetryRate>99) && (priv->LastRetryRate>99)) + if((CurrRetryRate>99) && (priv->LastRetryRate>99)) { // if((CurrRetryRate>199) && (priv->LastRetryRate>199)) - { bTryDown = true; - } - else if ( (CurrRetryRate < 65) && (priv->LastRetryRate < 70)) + } else if ( (CurrRetryRate < 65) && (priv->LastRetryRate < 70)) { // else if ( (CurrRetryRate < 85) && (priv->LastRetryRate < 90)) - { bTryUp = true; } //printk("case11---2M \n"); - } - else if ( priv->CurrentOperaRate == 2 ) - { + } else if ( priv->CurrentOperaRate == 2 ) { //2For 1 Mbps - if( (CurrRetryRate<70) && (priv->LastRetryRate<75)) + if( (CurrRetryRate<70) && (priv->LastRetryRate<75)) { // if( (CurrRetryRate<90) && (priv->LastRetryRate<95)) - { bTryUp = true; } //printk("case12---1M \n"); @@ -948,10 +827,8 @@ StaRateAdaptive87SE( // 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) - { + && priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate && priv->FailTxRateCount < 2) { + if(jiffies% (CurrRetryRate + 101) == 0) { bTryUp = true; priv->bTryuping = true; //printk("StaRateAdaptive87SE(): Randomly try upgrading...\n"); @@ -959,18 +836,14 @@ StaRateAdaptive87SE( } //1 Rate Mechanism - if(bTryUp) - { + if(bTryUp) { priv->TryupingCount++; priv->TryDownCountLowData = 0; - { // printk("UP: pHalData->TryupingCount = %d\n", priv->TryupingCount); // printk("UP: TryUpTh(%d)+ (FailTxRateCount(%d))^2 =%d\n", // TryUpTh, priv->FailTxRateCount, (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount) ); -// printk("UP: pHalData->bTryuping=%d\n", priv->bTryuping); - - } +// printk("UP: pHalData->bTryuping=%d\n", priv->bTryuping);} // // Check more times if we need to upgrade indeed. @@ -980,8 +853,7 @@ StaRateAdaptive87SE( // if((priv->TryupingCount > (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount)) || - (CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping) - { + (CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping) { priv->TryupingCount = 0; // // When transferring from CCK to OFDM, DIG is an important issue. @@ -1003,61 +875,48 @@ StaRateAdaptive87SE( // printk("StaRateAdaptive87SE(): Upgrade Tx Rate to %d\n", priv->CurrentOperaRate); //[TRC Dell Lab] Bypass 12/9/6, Isaiah 2008-02-18 20:00 - if(priv->CurrentOperaRate ==36) - { + if(priv->CurrentOperaRate ==36) { priv->bUpdateARFR=true; write_nic_word(dev, ARFR, 0x0F8F); //bypass 12/9/6 // printk("UP: ARFR=0xF8F\n"); - } - else if(priv->bUpdateARFR) - { + } else if(priv->bUpdateARFR) { priv->bUpdateARFR=false; write_nic_word(dev, ARFR, 0x0FFF); //set 1M ~ 54Mbps. // printk("UP: ARFR=0xFFF\n"); } // Update Fail Tx rate and count. - if(priv->LastFailTxRate != priv->CurrentOperaRate) - { + if(priv->LastFailTxRate != priv->CurrentOperaRate) { priv->LastFailTxRate = priv->CurrentOperaRate; priv->FailTxRateCount = 0; priv->LastFailTxRateSS = -200; // Set lowest power. } } - } - else - { + } else { if(priv->TryupingCount > 0) priv->TryupingCount --; } - if(bTryDown) - { + if(bTryDown) { priv->TryDownCountLowData++; priv->TryupingCount = 0; - { + // printk("DN: pHalData->TryDownCountLowData = %d\n",priv->TryDownCountLowData); // printk("DN: TryDownTh =%d\n", TryDownTh); // printk("DN: pHalData->bTryuping=%d\n", priv->bTryuping); - } + //Check if Tx rate can be degraded or Test trying upgrading should fallback. - if(priv->TryDownCountLowData > TryDownTh || priv->bTryuping) - { + if(priv->TryDownCountLowData > TryDownTh || priv->bTryuping) { priv->TryDownCountLowData = 0; priv->bTryuping = false; // Update fail information. - if(priv->LastFailTxRate == priv->CurrentOperaRate) - { + if(priv->LastFailTxRate == priv->CurrentOperaRate) { priv->FailTxRateCount ++; // Record the Tx fail rate signal strength. if(CurrSignalStrength > priv->LastFailTxRateSS) - { priv->LastFailTxRateSS = CurrSignalStrength; - } - } - else - { + } else { priv->LastFailTxRate = priv->CurrentOperaRate; priv->FailTxRateCount = 1; priv->LastFailTxRateSS = CurrSignalStrength; @@ -1066,21 +925,17 @@ StaRateAdaptive87SE( // Reduce chariot training time at weak signal strength situation. SD3 ED demand. //[TRC Dell Lab] Revise Signal Threshold from -75 to -80 , Isaiah 2008-02-18 20:00 - if( (CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72 )) - { + if( (CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72 )) { priv->CurrentOperaRate = 72; // printk("DN: weak signal strength (%d), degrade to 36Mbps\n", CurrSignalStrength); } //[TRC Dell Lab] Bypass 12/9/6, Isaiah 2008-02-18 20:00 - if(priv->CurrentOperaRate ==36) - { + if(priv->CurrentOperaRate ==36) { priv->bUpdateARFR=true; write_nic_word(dev, ARFR, 0x0F8F); //bypass 12/9/6 // printk("DN: ARFR=0xF8F\n"); - } - else if(priv->bUpdateARFR) - { + } else if(priv->bUpdateARFR) { priv->bUpdateARFR=false; write_nic_word(dev, ARFR, 0x0FFF); //set 1M ~ 54Mbps. // printk("DN: ARFR=0xFFF\n"); @@ -1089,15 +944,12 @@ StaRateAdaptive87SE( // // When it is CCK rate, it may need to update initial gain to receive lower power packets. // - if(MgntIsCckRate(priv->CurrentOperaRate)) - { + if(MgntIsCckRate(priv->CurrentOperaRate)) { bUpdateInitialGain = true; } // printk("StaRateAdaptive87SE(): Degrade Tx Rate to %d\n", priv->CurrentOperaRate); } - } - else - { + } else { if(priv->TryDownCountLowData > 0) priv->TryDownCountLowData --; } @@ -1105,8 +957,7 @@ StaRateAdaptive87SE( // 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)) - { + (!bTryUp && !bTryDown && priv->TryDownCountLowData == 0 && priv->TryupingCount && priv->FailTxRateCount > 0x6)) { priv->FailTxRateCount --; } @@ -1115,49 +966,39 @@ StaRateAdaptive87SE( CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel]; //[TRC Dell Lab] Mac0x9e increase 2 level in 36M~18M situation, Isaiah 2008-02-18 24:00 - if((priv->CurrentOperaRate < 96) &&(priv->CurrentOperaRate > 22)) - { + 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) ) - { + if(u1bCck == CckTxPwrIdx ) { + if(u1bOfdm != (OfdmTxPwrIdx+2) ) { priv->bEnhanceTxPwr= true; u1bOfdm = ((u1bOfdm+2) > 35) ? 35: (u1bOfdm+2); write_nic_byte(dev, OFDM_TXAGC, u1bOfdm); // printk("Enhance OFDM_TXAGC : +++++ u1bOfdm= 0x%x\n", u1bOfdm); } - } + } else if(u1bCck < CckTxPwrIdx) { // case 2: enter high power - else if(u1bCck < CckTxPwrIdx) - { - if(!priv->bEnhanceTxPwr) - { + if(!priv->bEnhanceTxPwr) { priv->bEnhanceTxPwr= true; u1bOfdm = ((u1bOfdm+2) > 35) ? 35: (u1bOfdm+2); write_nic_byte(dev, OFDM_TXAGC, u1bOfdm); //RT_TRACE(COMP_RATE, DBG_TRACE, ("Enhance OFDM_TXAGC(2) : +++++ u1bOfdm= 0x%x\n", u1bOfdm)); } } - } - else if(priv->bEnhanceTxPwr) //54/48/11/5.5/2/1 - { + } 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 ) - { + if(u1bCck == CckTxPwrIdx ) { priv->bEnhanceTxPwr= false; write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx); //printk("Recover OFDM_TXAGC : ===== u1bOfdm= 0x%x\n", OfdmTxPwrIdx); } // case 2: enter high power - else if(u1bCck < CckTxPwrIdx) - { + else if(u1bCck < CckTxPwrIdx) { priv->bEnhanceTxPwr= false; u1bOfdm = ((u1bOfdm-2) > 0) ? (u1bOfdm-2): 0; write_nic_byte(dev, OFDM_TXAGC, u1bOfdm); @@ -1171,35 +1012,26 @@ StaRateAdaptive87SE( // "from CCK to OFDM". // SetInitialGain: - if(bUpdateInitialGain) - { - if(MgntIsCckRate(priv->CurrentOperaRate)) // CCK - { - if(priv->InitialGain > priv->RegBModeGainStage) - { + 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 - { + + 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) - { + } else { // OFDM + if(priv->InitialGain < 4) { priv->InitialGainBackUp= priv->InitialGain; priv->InitialGain ++; @@ -1229,15 +1061,13 @@ void timer_rate_adaptive(unsigned long data) { struct r8180_priv* priv = ieee80211_priv((struct net_device *)data); //DMESG("---->timer_rate_adaptive()\n"); - if(!priv->up) - { + if(!priv->up) { // DMESG("<----timer_rate_adaptive():driver is not up!\n"); return; } if((priv->ieee80211->iw_mode != IW_MODE_MASTER) && (priv->ieee80211->state == IEEE80211_LINKED) && - (priv->ForcedDataRate == 0) ) - { + (priv->ForcedDataRate == 0) ) { // DMESG("timer_rate_adaptive():schedule rate_adapter_wq\n"); queue_work(priv->ieee80211->wq, (void *)&priv->ieee80211->rate_adapter_wq); // StaRateAdaptive87SE((struct net_device *)data); @@ -1259,12 +1089,9 @@ SwAntennaDiversityRxOk8185( priv->AdRxOkCnt++; - if( priv->AdRxSignalStrength != -1) - { + if( priv->AdRxSignalStrength != -1) { priv->AdRxSignalStrength = ((priv->AdRxSignalStrength*7) + (SignalStrength*3)) / 10; - } - else - { // Initialization case. + } else { // Initialization case. priv->AdRxSignalStrength = SignalStrength; } //{+by amy 080312 @@ -1290,8 +1117,7 @@ SetAntenna8185( // printk("+SetAntenna8185(): Antenna is switching to: %d \n", u1bAntennaIndex); - switch(u1bAntennaIndex) - { + switch(u1bAntennaIndex) { case 0: /* Mac register, main antenna */ write_nic_byte(dev, ANTSEL, 0x03); @@ -1319,9 +1145,7 @@ SetAntenna8185( } if(bAntennaSwitched) - { priv->CurrAntennaIndex = u1bAntennaIndex; - } // printk("-SetAntenna8185(): return (%#X)\n", bAntennaSwitched); @@ -1340,15 +1164,12 @@ SwitchAntenna( bool bResult; - if(priv->CurrAntennaIndex == 0) - { + if(priv->CurrAntennaIndex == 0) { bResult = SetAntenna8185(dev, 1); //by amy 080312 // printk("SwitchAntenna(): switching to antenna 1 ......\n"); // bResult = SetAntenna8185(dev, 1);//-by amy 080312 - } - else - { + } else { bResult = SetAntenna8185(dev, 0); //by amy 080312 // printk("SwitchAntenna(): switching to antenna 0 ......\n"); @@ -1375,8 +1196,7 @@ SwAntennaDiversity( // printk("+SwAntennaDiversity(): CurrAntennaIndex: %d\n", priv->CurrAntennaIndex); // printk("AdTickCount is %d\n",priv->AdTickCount); //by amy 080312 - if(bSwCheckSS) - { + if(bSwCheckSS) { priv->AdTickCount++; printk("(1) AdTickCount: %d, AdCheckPeriod: %d\n", @@ -1387,25 +1207,22 @@ SwAntennaDiversity( // priv->AdTickCount++;//-by amy 080312 // Case 1. No Link. - if(priv->ieee80211->state != IEEE80211_LINKED) - { + if(priv->ieee80211->state != IEEE80211_LINKED) { // printk("SwAntennaDiversity(): Case 1. No Link.\n"); 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 received. - else if(priv->AdRxOkCnt == 0) - { + + // Case 2. Linked but no packet receive.d + } else if(priv->AdRxOkCnt == 0) { // printk("SwAntennaDiversity(): Case 2. Linked but no packet received.\n"); priv->bAdSwitchedChecking = false; SwitchAntenna(dev); - } - // Case 3. Evaluate last antenna switch action and undo it if necessary. - else if(priv->bAdSwitchedChecking == true) - { + + // Case 3. Evaluate last antenna switch action and undo it if necessary. + } else if(priv->bAdSwitchedChecking == true) { // printk("SwAntennaDiversity(): Case 3. Evaluate last antenna switch action.\n"); priv->bAdSwitchedChecking = false; @@ -1415,8 +1232,8 @@ SwAntennaDiversity( 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. + if(priv->AdRxSignalStrength < priv->AdRxSsBeforeSwitched) { + // Rx signal strength is not improved after we swtiched antenna. => Swich back. // printk("SwAntennaDiversity(): Rx Signal Strength is not improved, CurrRxSs: %d, LastRxSs: %d\n", // priv->AdRxSignalStrength, priv->AdRxSsBeforeSwitched); //by amy 080312 @@ -1429,9 +1246,8 @@ SwAntennaDiversity( // Wrong deceision => switch back. SwitchAntenna(dev); - } - else - { // Rx Signal Strength is improved. + } else { + // Rx Signal Strength is improved. // printk("SwAntennaDiversity(): Rx Signal Strength is improved, CurrRxSs: %d, LastRxSs: %d\n", // priv->AdRxSignalStrength, priv->AdRxSsBeforeSwitched); @@ -1444,8 +1260,7 @@ SwAntennaDiversity( } // 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// if(priv->AdTickCount >= priv->AdCheckPeriod)//-by amy 080312 - { + else { // if(priv->AdTickCount >= priv->AdCheckPeriod)//-by amy 080312 // printk("SwAntennaDiversity(): Case 4. Evaluate if we shall switch antenna now.\n"); priv->AdTickCount = 0; @@ -1463,8 +1278,8 @@ SwAntennaDiversity( // Added by Roger, 2008.02.21. //{by amy 080312 if((priv->AdMainAntennaRxOkCnt < priv->AdAuxAntennaRxOkCnt) - && (priv->CurrAntennaIndex == 0)) - { // We set Main antenna as default but RxOk count was less than Aux ones. + && (priv->CurrAntennaIndex == 0)) { + // We set Main antenna as default but RxOk count was less than Aux ones. // printk("SwAntennaDiversity(): Main antenna RxOK is poor, AdMainAntennaRxOkCnt: %d, AdAuxAntennaRxOkCnt: %d\n", // priv->AdMainAntennaRxOkCnt, priv->AdAuxAntennaRxOkCnt); @@ -1472,10 +1287,9 @@ SwAntennaDiversity( // 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. + } else if((priv->AdAuxAntennaRxOkCnt < priv->AdMainAntennaRxOkCnt) + && (priv->CurrAntennaIndex == 1)) { + // We set Aux antenna as default but RxOk count was less than Main ones. // printk("SwAntennaDiversity(): Aux antenna RxOK is poor, AdMainAntennaRxOkCnt: %d, AdAuxAntennaRxOkCnt: %d\n", // priv->AdMainAntennaRxOkCnt, priv->AdAuxAntennaRxOkCnt); @@ -1483,9 +1297,8 @@ SwAntennaDiversity( // Switch to Main antenna. SwitchAntenna(dev); priv->bHWAdSwitched = true; - } - else - {// Default antenna is better. + } else { + // Default antenna is better. // printk("SwAntennaDiversity(): Default antenna is better., AdMainAntennaRxOkCnt: %d, AdAuxAntennaRxOkCnt: %d\n", // priv->AdMainAntennaRxOkCnt, priv->AdAuxAntennaRxOkCnt); @@ -1504,12 +1317,11 @@ SwAntennaDiversity( // 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)) - { + if( (!priv->bHWAdSwitched) && (bSwCheckSS)) { //by amy 080312} // Evaluate Rx signal strength if we shall switch antenna now. - if(priv->AdRxSignalStrength < priv->AdRxSsThreshold) - { // Rx signal strength is weak => Switch Antenna. + if(priv->AdRxSignalStrength < priv->AdRxSsThreshold) { + // Rx signal strength is weak => Switch Antenna. // printk("SwAntennaDiversity(): Rx Signal Strength is weak, CurrRxSs: %d, RxSsThreshold: %d\n", // priv->AdRxSignalStrength, priv->AdRxSsThreshold); @@ -1517,17 +1329,16 @@ SwAntennaDiversity( priv->bAdSwitchedChecking = true; SwitchAntenna(dev); - } - else - { // Rx signal strength is OK. + } else { + // Rx signal strength is OK. // printk("SwAntennaDiversity(): Rx Signal Strength is OK, CurrRxSs: %d, RxSsThreshold: %d\n", // priv->AdRxSignalStrength, priv->AdRxSsThreshold); 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->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 @@ -1535,9 +1346,7 @@ SwAntennaDiversity( // Reduce Antenna Diversity checking period if possible. if( priv->AdCheckPeriod > priv->AdMinCheckPeriod ) - { priv->AdCheckPeriod /= 2; - } } } } @@ -1563,9 +1372,7 @@ CheckTxPwrTracking( struct net_device *dev) struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev); if(!priv->bTxPowerTrack) - { return false; - } //lzm reserved 080826 //if(priv->bScanInProgress) @@ -1575,9 +1382,7 @@ CheckTxPwrTracking( struct net_device *dev) //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; } @@ -1602,24 +1407,20 @@ SwAntennaDiversityTimerCallback( // 2007.05.09, added by Roger. // rtState = priv->eRFPowerState; - do{ - if (rtState == eRfOff) - { + do { + if (rtState == eRfOff) { // printk("SwAntennaDiversityTimer - RF is OFF.\n"); break; - } - else if (rtState == eRfSleep) - { + } else if (rtState == eRfSleep) { // Don't access BB/RF under Disable PLL situation. //RT_TRACE((COMP_RF|COMP_ANTENNA), DBG_LOUD, ("SwAntennaDiversityTimerCallback(): RF is Sleep => skip it\n")); break; } SwAntennaDiversity(dev); - }while(false); + } while(false); - if(priv->up) - { + if(priv->up) { priv->SwAntennaDiversityTimer.expires = jiffies + MSECS(ANTENNA_DIVERSITY_TIMER_PERIOD); add_timer(&priv->SwAntennaDiversityTimer); } -- 2.20.1