//#include "r8180.h"
#include "r8180_dm.h"
#include "r8180_hw.h"
#include "r8180_93cx6.h"
//{by amy 080312
//
// Description:
// Return TRUE if we shall perform High Power Mecahnism, FALSE otherwise.
//
//+by amy 080312
#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;
//printk("----> DoTxHighPower()\n");
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];
// printk("DoTxHighPower() - UndecoratedSmoothedSS:%d, CurCCKRSSI = %d , bCurCCKPkt= %d \n", priv->UndecoratedSmoothedSS, priv->CurCCKRSSI, priv->bCurCCKPkt );
if((priv->UndecoratedSmoothedSS > HiPwrUpperTh) ||
(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 );
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))
{
// printk("DoTxHighPower() - lower Power - UndecoratedSmoothedSS:%d, HiPwrUpperTh = %d \n", priv->UndecoratedSmoothedSS, HiPwrLowerTh );
if(priv->bToUpdateTxPwr)
{
priv->bToUpdateTxPwr = false;
//SD3 required.
u1bTmp= read_nic_byte(dev, CCK_TXAGC);
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)
{
//u1bTmp = ((u1bTmp+16) > 35) ? 35: (u1bTmp+16); // 8dbm
//write_nic_byte(dev, OFDM_TXAGC, u1bTmp);
write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
}
}
}
//printk("<---- DoTxHighPower()\n");
}
//
// 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 r8180_priv *priv = container_of(work, struct r8180_priv, watch_dog_wq);
// struct ieee80211_device * ieee = (struct ieee80211_device*)
// container_of(work, struct ieee80211_device, watch_dog_wq);
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;
// printk("----> UpdateTxPowerWorkItemCallback()\n");
DoTxHighPower(dev);
// printk("<---- UpdateTxPowerWorkItemCallback()\n");
}
//
// Description:
// Return TRUE if we shall perform DIG Mecahnism, 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->CurrentOperaRate < 36) // Schedule Dig under all OFDM rates. By Bruce, 2007-06-01.
if((priv->ieee80211->rate/5) < 36) // Schedule Dig under all OFDM rates. By Bruce, 2007-06-01.
return false;
return true;
}
//
// Description:
// 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;
//printk("---------> DIG_Zebra()\n");
CCKFalseAlarm = (u16)(priv->FalseAlarmRegValue & 0x0000ffff);
OFDMFalseAlarm = (u16)((priv->FalseAlarmRegValue >> 16) & 0x0000ffff);
OfdmFA1 = 0x15;
OfdmFA2 = ((u16)(priv->RegDigOfdmFaUpTh)) << 8;
// printk("DIG**********CCK False Alarm: %#X \n",CCKFalseAlarm);
// 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
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);
//printk("&&& DozePeriod=%d AwakePeriod=%d\n", priv->DozePeriodInPast2Sec, AwakePeriodIn2Sec);
priv ->DozePeriodInPast2Sec=0;
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
{
;//RT_TRACE(COMP_DIG, DBG_WARNING, ("ERROR!! AwakePeriodIn2Sec should not be ZERO!!\n"));
}
#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);
// printk("DIG**********OFDM False Alarm: %#X, OfdmFA1: %#X, OfdmFA2: %#X\n", OFDMFalseAlarm, OfdmFA1, OfdmFA2);
// printk("DIG+++++++ fallback OFDM:%d \n", priv->InitialGain);
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);
// printk("DIG**********OFDM False Alarm: %#X, OfdmFA1: %#X, OfdmFA2: %#X\n", OFDMFalseAlarm, OfdmFA1, OfdmFA2);
// printk("DIG--------- Upgrade OFDM:%d \n", priv->InitialGain);
UpdateInitialGain(dev);
}
priv->DIG_NumberFallbackVote = 0;
priv->DIG_NumberUpgradeVote=0;
}
}
// printk("DIG+++++++ OFDM:%d\n", priv->InitialGain);
//printk("<--------- DIG_Zebra()\n");
}
//
// Description:
// 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;
}
//
// Description:
// 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.
// By Bruce, 2007-06-05.
//
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))
{
// printk("GetUpgradeTxRate(): GetUpgrade Tx rate(%d) from %d !\n", UpRate, priv->CurrentOperaRate);
return UpRate;
}
else
{
//printk("GetUpgradeTxRate(): Tx rate (%d) is not in supported rates\n", UpRate);
return rate;
}
return rate;
}
//
// Description:
// 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.
// By Bruce, 2007-06-05.
//
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))
{
// printk("GetDegradeTxRate(): GetDegrade Tx rate(%d) from %d!\n", DownRate, priv->CurrentOperaRate);
return DownRate;
}
else
{
//printk("GetDegradeTxRate(): Tx rate (%d) is not in supported rates\n", DownRate);
return rate;
}
return rate;
}
//
// Helper function to determine if specified data rate is
// CCK rate.
// 2005.01.25, by rcnjko.
//
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.
// Created by Roger, 2007.12.11.
//
void
TxPwrTracking87SE(
struct net_device *dev
)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
u8 tmpu1Byte, CurrentThermal, Idx;
char CckTxPwrIdx, OfdmTxPwrIdx;
//u32 u4bRfReg;
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
//printk("TxPwrTracking87SE(): CurrentThermal(%d)\n", CurrentThermal);
if( CurrentThermal != priv->ThermalMeter)
{
// printk("TxPwrTracking87SE(): Thermal meter changed!!!\n");
// 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;
//u16 i,idx;
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;
//printk("priv->CurrentOperaRate is %d\n",priv->CurrentOperaRate);
//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);
}
//
// Added by Roger, 2007.01.02.
// For debug information.
//
//printk("\n(1) pHalData->LastRetryRate: %d \n",priv->LastRetryRate);
//printk("(2) RetryCnt = %d \n", CurrRetryCnt);
//printk("(3) TxokCnt = %d \n", CurrTxokCnt);
//printk("(4) CurrRetryRate = %d \n", CurrRetryRate);
//printk("(5) CurrSignalStrength = %d \n",CurrSignalStrength);
//printk("(6) TxThroughput is %d\n",TxThroughput);
//printk("priv->NumTxOkBytesTotal is %d\n",priv->NumTxOkBytesTotal);
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++;
// 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)
{
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).
// 2007.04.09, by Roger.
//
//
// 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 mehanism of trying to upgrade tx rate.
// (5) Record the information of upping tx rate to avoid trying upping tx rate constantly.
// By Bruce, 2007-06-05.
//
//
// 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 bwtween 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;
//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
{
priv->bTryuping = false;
}
}
else if (CurrSignalStrength > -47 && (CurrRetryRate < 50))
{
//2For High Power
//
// Added by Roger, 2007.04.09.
// 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;
}
// printk("case2: StaRateAdaptive87SE: Power(%d) is high enough!!. \n", CurrSignalStrength);
}
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;
// printk("case3: RA: Tx Retry is serious. Degrade Tx Rate to %d directly...\n", priv->CurrentOperaRate);
}
else if ( priv->CurrentOperaRate == 108 )
{
//2For 54Mbps
// Air Link
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))
{
//Down to rate 48Mbps.
bTryDown = true;
}
if(bTryDown && (CurrSignalStrength < -75)) //cable link
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case4---54M \n");
}
else if ( priv->CurrentOperaRate == 96 )
{
//2For 48Mbps
//Air Link
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))
{
//Down to rate 36Mbps.
bTryDown = true;
}
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<28) && (priv->LastRetryRate<8) )
{
bTryUp = true;
}
if(bTryDown && (CurrSignalStrength < -75))
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case5---48M \n");
}
else if ( priv->CurrentOperaRate == 72 )
{
//2For 36Mbps
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 + 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<35) && (priv->LastRetryRate<36))
{
bTryUp = true;
}
if(bTryDown && (CurrSignalStrength < -80))
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case6---36M \n");
}
else if ( priv->CurrentOperaRate == 48 )
{
//2For 24Mbps
// Air Link
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>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 + 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<40) && (priv->LastRetryRate<41))
{
bTryUp = true;
}
if(bTryDown && (CurrSignalStrength < -82))
{
priv->TryDownCountLowData += TryDownTh;
}
//printk("case7---24M \n");
}
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>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 ))
// 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<42) && (priv->LastRetryRate<43))
{
bTryUp = true;
}
//printk("case8---18M \n");
}
else if ( priv->CurrentOperaRate == 22 )
{
//2For 11Mbps
if (CurrRetryRate>95)
// if (CurrRetryRate>155)
{
bTryDown = true;
}
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 )
{
//2For 5.5Mbps
if (CurrRetryRate>149)
// if (CurrRetryRate>189)
{
bTryDown = true;
}
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 )
{
//2For 2 Mbps
if((CurrRetryRate>99) && (priv->LastRetryRate>99))
// if((CurrRetryRate>199) && (priv->LastRetryRate>199))
{
bTryDown = true;
}
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 )
{
//2For 1 Mbps
if( (CurrRetryRate<70) && (priv->LastRetryRate<75))
// if( (CurrRetryRate<90) && (priv->LastRetryRate<95))
{
bTryUp = true;
}
//printk("case12---1M \n");
}
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;
//printk("StaRateAdaptive87SE(): Randomly try upgrading...\n");
}
}
//1 Rate Mechanism
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);
}
//
// 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 carefully 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);
// 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)
{
priv->bUpdateARFR=true;
write_nic_word(dev, ARFR, 0x0F8F); //bypass 12/9/6
// printk("UP: ARFR=0xF8F\n");
}
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)
{
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;
{
// 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)
{
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.
//[TRC Dell Lab] Revise Signal Threshold from -75 to -80 , Isaiah 2008-02-18 20:00
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)
{
priv->bUpdateARFR=true;
write_nic_word(dev, ARFR, 0x0F8F); //bypass 12/9/6
// printk("DN: ARFR=0xF8F\n");
}
else if(priv->bUpdateARFR)
{
priv->bUpdateARFR=false;
write_nic_word(dev, ARFR, 0x0FFF); //set 1M ~ 54Mbps.
// printk("DN: ARFR=0xFFF\n");
}
//
// When it is CCK rate, it may need to update initial gain to receive lower power packets.
//
if(MgntIsCckRate(priv->CurrentOperaRate))
{
bUpdateInitialGain = true;
}
// printk("StaRateAdaptive87SE(): Degrade Tx Rate to %d\n", priv->CurrentOperaRate);
}
}
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];
//[TRC Dell Lab] Mac0x9e increase 2 level in 36M~18M situation, Isaiah 2008-02-18 24:00
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);
// printk("Enhance OFDM_TXAGC : +++++ u1bOfdm= 0x%x\n", u1bOfdm);
}
}
// case 2: enter high power
else if(u1bCck < CckTxPwrIdx)
{
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
{
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);
//printk("Recover OFDM_TXAGC : ===== u1bOfdm= 0x%x\n", 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);
//RT_TRACE(COMP_RATE, DBG_TRACE, ("Recover OFDM_TXAGC(2): ===== u1bOfdm= 0x%x\n", 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;
//struct r8180_priv *priv = ieee80211_priv(dev);
// DMESG("---->rtl8180_rate_adapter");
StaRateAdaptive87SE(dev);
// DMESG("<----rtl8180_rate_adapter");
}
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)
{
// 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) )
{
// 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);
}
priv->rateadapter_timer.expires = jiffies + MSECS(priv->RateAdaptivePeriod);
add_timer(&priv->rateadapter_timer);
//DMESG("<----timer_rate_adaptive()\n");
}
//by amy 080312}
void
SwAntennaDiversityRxOk8185(
struct net_device *dev,
u8 SignalStrength
)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
// printk("+SwAntennaDiversityRxOk8185: RxSs: %d\n", SignalStrength);
priv->AdRxOkCnt++;
if( priv->AdRxSignalStrength != -1)
{
priv->AdRxSignalStrength = ((priv->AdRxSignalStrength*7) + (SignalStrength*3)) / 10;
}
else
{ // Initialization case.
priv->AdRxSignalStrength = SignalStrength;
}
//{+by amy 080312
if( priv->LastRxPktAntenna ) //Main antenna.
priv->AdMainAntennaRxOkCnt++;
else // Aux antenna.
priv->AdAuxAntennaRxOkCnt++;
//+by amy 080312
// printk("-SwAntennaDiversityRxOk8185: AdRxOkCnt: %d AdRxSignalStrength: %d\n", priv->AdRxOkCnt, priv->AdRxSignalStrength);
}
//
// Description:
// Change Antenna Switch.
//
bool
SetAntenna8185(
struct net_device *dev,
u8 u1bAntennaIndex
)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
bool bAntennaSwitched = false;
// printk("+SetAntenna8185(): Antenna is switching to: %d \n", u1bAntennaIndex);
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;
}
// printk("-SetAntenna8185(): return (%#X)\n", bAntennaSwitched);
return bAntennaSwitched;
}
//
// Description:
// 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);
//by amy 080312
// printk("SwitchAntenna(): switching to antenna 1 ......\n");
// bResult = SetAntenna8185(dev, 1);//-by amy 080312
}
else
{
bResult = SetAntenna8185(dev, 0);
//by amy 080312
// printk("SwitchAntenna(): switching to antenna 0 ......\n");
// bResult = SetAntenna8185(dev, 0);//-by amy 080312
}
return bResult;
}
//
// Description:
// Engine of SW Antenna Diversity mechanism.
// Since 8187 has no Tx part information,
// this implementation is only dependend on Rx part information.
//
// 2006.04.17, by rcnjko.
//
void
SwAntennaDiversity(
struct net_device *dev
)
{
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
bool bSwCheckSS=false;
// printk("+SwAntennaDiversity(): CurrAntennaIndex: %d\n", priv->CurrAntennaIndex);
// printk("AdTickCount is %d\n",priv->AdTickCount);
//by amy 080312
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);
}
// priv->AdTickCount++;//-by amy 080312
// Case 1. No Link.
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)
{
// 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)
{
// printk("SwAntennaDiversity(): Case 3. Evaluate last antenna switch action.\n");
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.
// printk("SwAntennaDiversity(): Rx Signal Strength is not improved, CurrRxSs: %d, LastRxSs: %d\n",
// priv->AdRxSignalStrength, priv->AdRxSsBeforeSwitched);
//by amy 080312
// Increase Antenna Diversity checking period due to bad decision.
priv->AdCheckPeriod *= 2;
//by amy 080312
// Increase Antenna Diversity checking period.
if(priv->AdCheckPeriod > priv->AdMaxCheckPeriod)
priv->AdCheckPeriod = priv->AdMaxCheckPeriod;
// Wrong deceision => switch back.
SwitchAntenna(dev);
}
else
{ // Rx Signal Strength is improved.
// printk("SwAntennaDiversity(): Rx Signal Strength is improved, CurrRxSs: %d, LastRxSs: %d\n",
// priv->AdRxSignalStrength, priv->AdRxSsBeforeSwitched);
// Reset Antenna Diversity checking period to its min value.
priv->AdCheckPeriod = priv->AdMinCheckPeriod;
}
// printk("SwAntennaDiversity(): AdRxSsThreshold: %d, AdCheckPeriod: %d\n",
// priv->AdRxSsThreshold, priv->AdCheckPeriod);
}
// 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
{
// printk("SwAntennaDiversity(): Case 4. Evaluate if we shall switch antenna now.\n");
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.
// 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.
// printk("SwAntennaDiversity(): Main antenna RxOK is poor, AdMainAntennaRxOkCnt: %d, AdAuxAntennaRxOkCnt: %d\n",
// priv->AdMainAntennaRxOkCnt, priv->AdAuxAntennaRxOkCnt);
// 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.
// printk("SwAntennaDiversity(): Aux antenna RxOK is poor, AdMainAntennaRxOkCnt: %d, AdAuxAntennaRxOkCnt: %d\n",
// priv->AdMainAntennaRxOkCnt, priv->AdAuxAntennaRxOkCnt);
// Switch to Main antenna.
SwitchAntenna(dev);
priv->bHWAdSwitched = true;
}
else
{// Default antenna is better.
// printk("SwAntennaDiversity(): Default antenna is better., AdMainAntennaRxOkCnt: %d, AdAuxAntennaRxOkCnt: %d\n",
// priv->AdMainAntennaRxOkCnt, priv->AdAuxAntennaRxOkCnt);
// Still need to check current signal strength.
priv->bHWAdSwitched = false;
}
//
// <Roger_Notes> We evaluate Rx signal strength ONLY when default antenna
// didn't changed 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))
{
//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.
// printk("SwAntennaDiversity(): Rx Signal Strength is weak, CurrRxSs: %d, RxSsThreshold: %d\n",
// priv->AdRxSignalStrength, priv->AdRxSsThreshold);
priv->AdRxSsBeforeSwitched = priv->AdRxSignalStrength;
priv->bAdSwitchedChecking = true;
SwitchAntenna(dev);
}
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->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;
}
}
}
}
//by amy 080312
// Reset antenna diversity Rx related statistics.
priv->AdRxOkCnt = 0;
priv->AdMainAntennaRxOkCnt = 0;
priv->AdAuxAntennaRxOkCnt = 0;
//by amy 080312
// priv->AdRxOkCnt = 0;//-by amy 080312
// printk("-SwAntennaDiversity()\n");
}
//
// Description:
// Return TRUE if we shall perform Tx Power Tracking Mecahnism, FALSE otherwise.
//
bool
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)
//{
// 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;
}
//
// Description:
// 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;
//printk("+SwAntennaDiversityTimerCallback()\n");
//
// We do NOT need to switch antenna while RF is off.
// 2007.05.09, added by Roger.
//
rtState = priv->eRFPowerState;
do{
if (rtState == eRfOff)
{
// printk("SwAntennaDiversityTimer - RF is OFF.\n");
break;
}
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);
if(priv->up)
{
priv->SwAntennaDiversityTimer.expires = jiffies + MSECS(ANTENNA_DIVERSITY_TIMER_PERIOD);
add_timer(&priv->SwAntennaDiversityTimer);
}
//printk("-SwAntennaDiversityTimerCallback()\n");
}