ARM: EXYNOS: Remove hardware.h file

[linux-2.6/btrfs-unstable.git] / drivers / staging / rtl8187se / r8180_dm.c

#include "r8180_dm.h"
#include "r8180_hw.h"
#include "r8180_93cx6.h"

 /*     Return TRUE if we shall perform High Power Mechanism, FALSE otherwise. */
#define RATE_ADAPTIVE_TIMER_PERIOD      300

bool CheckHighPower(struct net_device *dev)
{
        struct r8180_priv *priv = ieee80211_priv(dev);
        struct ieee80211_device *ieee = priv->ieee80211;

        if (!priv->bRegHighPowerMechanism)
                return false;

        if (ieee->state == IEEE80211_LINKED_SCANNING)
                return false;

        return true;
}

/*
 *      Description:
 *              Update Tx power level if necessary.
 *              See also DoRxHighPower() and SetTxPowerLevel8185() for reference.
 *
 *      Note:
 *              The reason why we udpate Tx power level here instead of DoRxHighPower()
 *              is the number of IO to change Tx power is much more than channel TR switch
 *              and they are related to OFDM and MAC registers.
 *              So, we don't want to update it so frequently in per-Rx packet base.
 */
static void DoTxHighPower(struct net_device *dev)
{
        struct r8180_priv *priv = ieee80211_priv(dev);
        u16                     HiPwrUpperTh = 0;
        u16                     HiPwrLowerTh = 0;
        u8                      RSSIHiPwrUpperTh;
        u8                      RSSIHiPwrLowerTh;
        u8                      u1bTmp;
        char                    OfdmTxPwrIdx, CckTxPwrIdx;

        HiPwrUpperTh = priv->RegHiPwrUpperTh;
        HiPwrLowerTh = priv->RegHiPwrLowerTh;

        HiPwrUpperTh = HiPwrUpperTh * 10;
        HiPwrLowerTh = HiPwrLowerTh * 10;
        RSSIHiPwrUpperTh = priv->RegRSSIHiPwrUpperTh;
        RSSIHiPwrLowerTh = priv->RegRSSIHiPwrLowerTh;

        /* lzm add 080826 */
        OfdmTxPwrIdx  = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
        CckTxPwrIdx  = priv->chtxpwr[priv->ieee80211->current_network.channel];

        if ((priv->UndecoratedSmoothedSS > HiPwrUpperTh) ||
                (priv->bCurCCKPkt && (priv->CurCCKRSSI > RSSIHiPwrUpperTh))) {
                /* Stevenl suggested that degrade 8dbm in high power sate. 2007-12-04 Isaiah */

                priv->bToUpdateTxPwr = true;
                u1bTmp = read_nic_byte(dev, CCK_TXAGC);

                /* If it never enter High Power. */
                if (CckTxPwrIdx == u1bTmp) {
                        u1bTmp = (u1bTmp > 16) ? (u1bTmp - 16) : 0;  /* 8dbm */
                        write_nic_byte(dev, CCK_TXAGC, u1bTmp);

                        u1bTmp = read_nic_byte(dev, OFDM_TXAGC);
                        u1bTmp = (u1bTmp > 16) ? (u1bTmp - 16) : 0;  /* 8dbm */
                        write_nic_byte(dev, OFDM_TXAGC, u1bTmp);
                }

        } else if ((priv->UndecoratedSmoothedSS < HiPwrLowerTh) &&
                (!priv->bCurCCKPkt || priv->CurCCKRSSI < RSSIHiPwrLowerTh)) {
                if (priv->bToUpdateTxPwr) {
                        priv->bToUpdateTxPwr = false;
                        /* SD3 required. */
                        u1bTmp = read_nic_byte(dev, CCK_TXAGC);
                        if (u1bTmp < CckTxPwrIdx) {
                                write_nic_byte(dev, CCK_TXAGC, CckTxPwrIdx);
                        }

                        u1bTmp = read_nic_byte(dev, OFDM_TXAGC);
                        if (u1bTmp < OfdmTxPwrIdx) {
                                write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
                        }
                }
        }
}


/*
 *      Description:
 *              Callback function of UpdateTxPowerWorkItem.
 *              Because of some event happened, e.g. CCX TPC, High Power Mechanism,
 *              We update Tx power of current channel again.
 */
void rtl8180_tx_pw_wq(struct work_struct *work)
{
        struct delayed_work *dwork = to_delayed_work(work);
        struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, tx_pw_wq);
        struct net_device *dev = ieee->dev;

        DoTxHighPower(dev);
}


/*
 *      Return TRUE if we shall perform DIG Mechanism, FALSE otherwise.
 */
bool CheckDig(struct net_device *dev)
{
        struct r8180_priv *priv = ieee80211_priv(dev);
        struct ieee80211_device *ieee = priv->ieee80211;

        if (!priv->bDigMechanism)
                return false;

        if (ieee->state != IEEE80211_LINKED)
                return false;

        if ((priv->ieee80211->rate / 5) < 36) /* Schedule Dig under all OFDM rates. By Bruce, 2007-06-01. */
                return false;
        return true;
}
/*
 *      Implementation of DIG for Zebra and Zebra2.
 */
static void DIG_Zebra(struct net_device *dev)
{
        struct r8180_priv *priv = ieee80211_priv(dev);
        u16                     CCKFalseAlarm, OFDMFalseAlarm;
        u16                     OfdmFA1, OfdmFA2;
        int                     InitialGainStep = 7; /* The number of initial gain stages. */
        int                     LowestGainStage = 4; /* The capable lowest stage of performing dig workitem. */
        u32                     AwakePeriodIn2Sec = 0;

        CCKFalseAlarm = (u16)(priv->FalseAlarmRegValue & 0x0000ffff);
        OFDMFalseAlarm = (u16)((priv->FalseAlarmRegValue >> 16) & 0x0000ffff);
        OfdmFA1 =  0x15;
        OfdmFA2 = ((u16)(priv->RegDigOfdmFaUpTh)) << 8;

        /* The number of initial gain steps is different, by Bruce, 2007-04-13. */
        if (priv->InitialGain == 0) { /* autoDIG */
                /* Advised from SD3 DZ */
                priv->InitialGain = 4; /* In 87B, m74dBm means State 4 (m82dBm) */
        }
        /* Advised from SD3 DZ */
        OfdmFA1 = 0x20;

#if 1 /* lzm reserved 080826 */
        AwakePeriodIn2Sec = (2000 - priv->DozePeriodInPast2Sec);
        priv->DozePeriodInPast2Sec = 0;

        if (AwakePeriodIn2Sec) {
                OfdmFA1 = (u16)((OfdmFA1 * AwakePeriodIn2Sec) / 2000);
                OfdmFA2 = (u16)((OfdmFA2 * AwakePeriodIn2Sec) / 2000);
        } else {
                ;
        }
#endif

        InitialGainStep = 8;
        LowestGainStage = priv->RegBModeGainStage; /* Lowest gain stage. */

        if (OFDMFalseAlarm > OfdmFA1) {
                if (OFDMFalseAlarm > OfdmFA2) {
                        priv->DIG_NumberFallbackVote++;
                        if (priv->DIG_NumberFallbackVote > 1) {
                                /* serious OFDM  False Alarm, need fallback */
                                if (priv->InitialGain < InitialGainStep) {
                                        priv->InitialGainBackUp = priv->InitialGain;

                                        priv->InitialGain = (priv->InitialGain + 1);
                                        UpdateInitialGain(dev);
                                }
                                priv->DIG_NumberFallbackVote = 0;
                                priv->DIG_NumberUpgradeVote = 0;
                        }
                } else {
                        if (priv->DIG_NumberFallbackVote)
                                priv->DIG_NumberFallbackVote--;
                }
                priv->DIG_NumberUpgradeVote = 0;
        } else {
                if (priv->DIG_NumberFallbackVote)
                        priv->DIG_NumberFallbackVote--;
                priv->DIG_NumberUpgradeVote++;

                if (priv->DIG_NumberUpgradeVote > 9) {
                        if (priv->InitialGain > LowestGainStage) { /* In 87B, m78dBm means State 4 (m864dBm) */
                                priv->InitialGainBackUp = priv->InitialGain;

                                priv->InitialGain = (priv->InitialGain - 1);
                                UpdateInitialGain(dev);
                        }
                        priv->DIG_NumberFallbackVote = 0;
                        priv->DIG_NumberUpgradeVote = 0;
                }
        }
}

/*
 *      Dispatch DIG implementation according to RF.
 */
static void DynamicInitGain(struct net_device *dev)
{
        DIG_Zebra(dev);
}

void rtl8180_hw_dig_wq(struct work_struct *work)
{
        struct delayed_work *dwork = to_delayed_work(work);
        struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, hw_dig_wq);
        struct net_device *dev = ieee->dev;
        struct r8180_priv *priv = ieee80211_priv(dev);

        /* Read CCK and OFDM False Alarm. */
        priv->FalseAlarmRegValue = read_nic_dword(dev, CCK_FALSE_ALARM);


        /* Adjust Initial Gain dynamically. */
        DynamicInitGain(dev);

}

static int IncludedInSupportedRates(struct r8180_priv *priv, u8 TxRate)
{
        u8 rate_len;
        u8 rate_ex_len;
        u8                      RateMask = 0x7F;
        u8                      idx;
        unsigned short          Found = 0;
        u8                      NaiveTxRate = TxRate&RateMask;

        rate_len = priv->ieee80211->current_network.rates_len;
        rate_ex_len = priv->ieee80211->current_network.rates_ex_len;
        for (idx = 0; idx < rate_len; idx++) {
                if ((priv->ieee80211->current_network.rates[idx] & RateMask) == NaiveTxRate) {
                        Found = 1;
                        goto found_rate;
                }
        }
        for (idx = 0; idx < rate_ex_len; idx++) {
                if ((priv->ieee80211->current_network.rates_ex[idx] & RateMask) == NaiveTxRate) {
                        Found = 1;
                        goto found_rate;
                }
        }
        return Found;
found_rate:
        return Found;
}

/*
 *      Get the Tx rate one degree up form the input rate in the supported rates.
 *      Return the upgrade rate if it is successed, otherwise return the input rate.
 */
static u8 GetUpgradeTxRate(struct net_device *dev, u8 rate)
{
        struct r8180_priv *priv = ieee80211_priv(dev);
        u8                      UpRate;

        /* Upgrade 1 degree. */
        switch (rate) {
        case 108: /* Up to 54Mbps. */
                UpRate = 108;
                break;

        case 96: /* Up to 54Mbps. */
                UpRate = 108;
                break;

        case 72: /* Up to 48Mbps. */
                UpRate = 96;
                break;

        case 48: /* Up to 36Mbps. */
                UpRate = 72;
                break;

        case 36: /* Up to 24Mbps. */
                UpRate = 48;
                break;

        case 22: /* Up to 18Mbps. */
                UpRate = 36;
                break;

        case 11: /* Up to 11Mbps. */
                UpRate = 22;
                break;

        case 4: /* Up to 5.5Mbps. */
                UpRate = 11;
                break;

        case 2: /* Up to 2Mbps. */
                UpRate = 4;
                break;

        default:
                printk("GetUpgradeTxRate(): Input Tx Rate(%d) is undefined!\n", rate);
                return rate;
        }
        /* Check if the rate is valid. */
        if (IncludedInSupportedRates(priv, UpRate)) {
                return UpRate;
        } else {
                return rate;
        }
        return rate;
}
/*
 *      Get the Tx rate one degree down form the input rate in the supported rates.
 *      Return the degrade rate if it is successed, otherwise return the input rate.
 */

static u8 GetDegradeTxRate(struct net_device *dev, u8 rate)
{
        struct r8180_priv *priv = ieee80211_priv(dev);
        u8                      DownRate;

        /* Upgrade 1 degree. */
        switch (rate) {
        case 108: /* Down to 48Mbps. */
                DownRate = 96;
                break;

        case 96: /* Down to 36Mbps. */
                DownRate = 72;
                break;

        case 72: /* Down to 24Mbps. */
                DownRate = 48;
                break;

        case 48: /* Down to 18Mbps. */
                DownRate = 36;
                break;

        case 36: /* Down to 11Mbps. */
                DownRate = 22;
                break;

        case 22: /* Down to 5.5Mbps. */
                DownRate = 11;
                break;

        case 11: /* Down to 2Mbps. */
                DownRate = 4;
                break;

        case 4: /* Down to 1Mbps. */
                DownRate = 2;
                break;

        case 2: /* Down to 1Mbps. */
                DownRate = 2;
                break;

        default:
                printk("GetDegradeTxRate(): Input Tx Rate(%d) is undefined!\n", rate);
                return rate;
        }
        /* Check if the rate is valid. */
        if (IncludedInSupportedRates(priv, DownRate)) {
                return DownRate;
        } else {
                return rate;
        }
        return rate;
}
/*
 *      Helper function to determine if specified data rate is
 *      CCK rate.
 */

static bool MgntIsCckRate(u16 rate)
{
        bool bReturn = false;

        if ((rate <= 22) && (rate != 12) && (rate != 18)) {
                bReturn = true;
        }

        return bReturn;
}
/*
 *      Description:
 *              Tx Power tracking mechanism routine on 87SE.
 */
void TxPwrTracking87SE(struct net_device *dev)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
        u8      tmpu1Byte, CurrentThermal, Idx;
        char    CckTxPwrIdx, OfdmTxPwrIdx;

        tmpu1Byte = read_nic_byte(dev, EN_LPF_CAL);
        CurrentThermal = (tmpu1Byte & 0xf0) >> 4; /*[ 7:4]: thermal meter indication. */
        CurrentThermal = (CurrentThermal > 0x0c) ? 0x0c : CurrentThermal;/* lzm add 080826 */

        if (CurrentThermal != priv->ThermalMeter) {
                /* Update Tx Power level on each channel. */
                for (Idx = 1; Idx < 15; Idx++) {
                        CckTxPwrIdx = priv->chtxpwr[Idx];
                        OfdmTxPwrIdx = priv->chtxpwr_ofdm[Idx];

                        if (CurrentThermal > priv->ThermalMeter) {
                                /* higher thermal meter. */
                                CckTxPwrIdx += (CurrentThermal - priv->ThermalMeter) * 2;
                                OfdmTxPwrIdx += (CurrentThermal - priv->ThermalMeter) * 2;

                                if (CckTxPwrIdx > 35)
                                        CckTxPwrIdx = 35; /* Force TxPower to maximal index. */
                                if (OfdmTxPwrIdx > 35)
                                        OfdmTxPwrIdx = 35;
                        } else {
                                /* lower thermal meter. */
                                CckTxPwrIdx -= (priv->ThermalMeter - CurrentThermal) * 2;
                                OfdmTxPwrIdx -= (priv->ThermalMeter - CurrentThermal) * 2;

                                if (CckTxPwrIdx < 0)
                                        CckTxPwrIdx = 0;
                                if (OfdmTxPwrIdx < 0)
                                        OfdmTxPwrIdx = 0;
                        }

                        /* Update TxPower level on CCK and OFDM resp. */
                        priv->chtxpwr[Idx] = CckTxPwrIdx;
                        priv->chtxpwr_ofdm[Idx] = OfdmTxPwrIdx;
                }

                /* Update TxPower level immediately. */
                rtl8225z2_SetTXPowerLevel(dev, priv->ieee80211->current_network.channel);
        }
        priv->ThermalMeter = CurrentThermal;
}
static void StaRateAdaptive87SE(struct net_device *dev)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
        unsigned long   CurrTxokCnt;
        u16             CurrRetryCnt;
        u16             CurrRetryRate;
        unsigned long   CurrRxokCnt;
        bool            bTryUp = false;
        bool            bTryDown = false;
        u8              TryUpTh = 1;
        u8              TryDownTh = 2;
        u32             TxThroughput;
        long            CurrSignalStrength;
        bool            bUpdateInitialGain = false;
        u8              u1bOfdm = 0, u1bCck = 0;
        char            OfdmTxPwrIdx, CckTxPwrIdx;

        priv->RateAdaptivePeriod = RATE_ADAPTIVE_TIMER_PERIOD;


        CurrRetryCnt    = priv->CurrRetryCnt;
        CurrTxokCnt     = priv->NumTxOkTotal - priv->LastTxokCnt;
        CurrRxokCnt     = priv->ieee80211->NumRxOkTotal - priv->LastRxokCnt;
        CurrSignalStrength = priv->Stats_RecvSignalPower;
        TxThroughput = (u32)(priv->NumTxOkBytesTotal - priv->LastTxOKBytes);
        priv->LastTxOKBytes = priv->NumTxOkBytesTotal;
        priv->CurrentOperaRate = priv->ieee80211->rate / 5;
        /* 2 Compute retry ratio. */
        if (CurrTxokCnt > 0) {
                CurrRetryRate = (u16)(CurrRetryCnt * 100 / CurrTxokCnt);
        } else {
        /* It may be serious retry. To distinguish serious retry or no packets modified by Bruce */
                CurrRetryRate = (u16)(CurrRetryCnt * 100 / 1);
        }

        priv->LastRetryCnt = priv->CurrRetryCnt;
        priv->LastTxokCnt = priv->NumTxOkTotal;
        priv->LastRxokCnt = priv->ieee80211->NumRxOkTotal;
        priv->CurrRetryCnt = 0;

        /* 2No Tx packets, return to init_rate or not? */
        if (CurrRetryRate == 0 && CurrTxokCnt == 0) {
                /*
                 * After 9 (30*300ms) seconds in this condition, we try to raise rate.
                 */
                priv->TryupingCountNoData++;

                /* [TRC Dell Lab] Extend raised period from 4.5sec to 9sec, Isaiah 2008-02-15 18:00 */
                if (priv->TryupingCountNoData > 30) {
                        priv->TryupingCountNoData = 0;
                        priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
                        /* Reset Fail Record */
                        priv->LastFailTxRate = 0;
                        priv->LastFailTxRateSS = -200;
                        priv->FailTxRateCount = 0;
                }
                goto SetInitialGain;
        } else {
                priv->TryupingCountNoData = 0; /*Reset trying up times. */
        }


        /*
         * For Netgear case, I comment out the following signal strength estimation,
         * which can results in lower rate to transmit when sample is NOT enough (e.g. PING request).
         *
         * Restructure rate adaptive as the following main stages:
         * (1) Add retry threshold in 54M upgrading condition with signal strength.
         * (2) Add the mechanism to degrade to CCK rate according to signal strength
         *              and retry rate.
         * (3) Remove all Initial Gain Updates over OFDM rate. To avoid the complicated
         *              situation, Initial Gain Update is upon on DIG mechanism except CCK rate.
         * (4) Add the mechanism of trying to upgrade tx rate.
         * (5) Record the information of upping tx rate to avoid trying upping tx rate constantly.
         *
         */

        /*
         * 11Mbps or 36Mbps
         * Check more times in these rate(key rates).
         */
        if (priv->CurrentOperaRate == 22 || priv->CurrentOperaRate == 72)
                TryUpTh += 9;
        /*
         * Let these rates down more difficult.
         */
        if (MgntIsCckRate(priv->CurrentOperaRate) || priv->CurrentOperaRate == 36)
                TryDownTh += 1;

        /* 1 Adjust Rate. */
        if (priv->bTryuping == true) {
                /* 2 For Test Upgrading mechanism
                 * Note:
                 *      Sometimes the throughput is upon on the capability between the AP and NIC,
                 *      thus the low data rate does not improve the performance.
                 *      We randomly upgrade the data rate and check if the retry rate is improved.
                 */

                /* Upgrading rate did not improve the retry rate, fallback to the original rate. */
                if ((CurrRetryRate > 25) && TxThroughput < priv->LastTxThroughput) {
                        /*Not necessary raising rate, fall back rate. */
                        bTryDown = true;
                } else {
                        priv->bTryuping = false;
                }
        } else if (CurrSignalStrength > -47 && (CurrRetryRate < 50)) {
                /*
                 * 2For High Power
                 *
                 * Return to highest data rate, if signal strength is good enough.
                 * SignalStrength threshold(-50dbm) is for RTL8186.
                 * Revise SignalStrength threshold to -51dbm.
                 */
                /* Also need to check retry rate for safety, by Bruce, 2007-06-05. */
                if (priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate) {
                        bTryUp = true;
                        /* Upgrade Tx Rate directly. */
                        priv->TryupingCount += TryUpTh;
                }

        } else if (CurrTxokCnt > 9 && CurrTxokCnt < 100 && CurrRetryRate >= 600) {
                /*
                 *2 For Serious Retry
                 *
                 * Traffic is not busy but our Tx retry is serious.
                 */
                bTryDown = true;
                /* Let Rate Mechanism to degrade tx rate directly. */
                priv->TryDownCountLowData += TryDownTh;
        } else if (priv->CurrentOperaRate == 108) {
                /* 2For 54Mbps */
                /* Air Link */
                if ((CurrRetryRate > 26) && (priv->LastRetryRate > 25)) {
                        bTryDown = true;
                }
                /* Cable Link */
                else if ((CurrRetryRate > 17) && (priv->LastRetryRate > 16) && (CurrSignalStrength > -72)) {
                        bTryDown = true;
                }

                if (bTryDown && (CurrSignalStrength < -75)) /* cable link */
                        priv->TryDownCountLowData += TryDownTh;
        } else if (priv->CurrentOperaRate == 96) {
                /* 2For 48Mbps */
                /* Air Link */
                if (((CurrRetryRate > 48) && (priv->LastRetryRate > 47))) {
                        bTryDown = true;
                } else if (((CurrRetryRate > 21) && (priv->LastRetryRate > 20)) && (CurrSignalStrength > -74)) { /* Cable Link */
                        /* Down to rate 36Mbps. */
                        bTryDown = true;
                } else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
                        bTryDown = true;
                        priv->TryDownCountLowData += TryDownTh;
                } else if ((CurrRetryRate < 8) && (priv->LastRetryRate < 8)) { /* TO DO: need to consider (RSSI) */
                        bTryUp = true;
                }

                if (bTryDown && (CurrSignalStrength < -75)) {
                        priv->TryDownCountLowData += TryDownTh;
                }
        } else if (priv->CurrentOperaRate == 72) {
                /* 2For 36Mbps */
                if ((CurrRetryRate > 43) && (priv->LastRetryRate > 41)) {
                        /* Down to rate 24Mbps. */
                        bTryDown = true;
                } else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
                        bTryDown = true;
                        priv->TryDownCountLowData += TryDownTh;
                } else if ((CurrRetryRate < 15) &&  (priv->LastRetryRate < 16)) { /* TO DO: need to consider (RSSI) */
                        bTryUp = true;
                }

                if (bTryDown && (CurrSignalStrength < -80))
                        priv->TryDownCountLowData += TryDownTh;

        } else if (priv->CurrentOperaRate == 48) {
                /* 2For 24Mbps */
                /* Air Link */
                if (((CurrRetryRate > 63) && (priv->LastRetryRate > 62))) {
                        bTryDown = true;
                } else if (((CurrRetryRate > 33) && (priv->LastRetryRate > 32)) && (CurrSignalStrength > -82)) { /* Cable Link */
                        bTryDown = true;
                } else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
                        bTryDown = true;
                        priv->TryDownCountLowData += TryDownTh;
                } else if ((CurrRetryRate < 20) && (priv->LastRetryRate < 21)) { /* TO DO: need to consider (RSSI) */
                        bTryUp = true;
                }

                if (bTryDown && (CurrSignalStrength < -82))
                        priv->TryDownCountLowData += TryDownTh;

        } else if (priv->CurrentOperaRate == 36) {
                if (((CurrRetryRate > 85) && (priv->LastRetryRate > 86))) {
                        bTryDown = true;
                } else if ((CurrRetryRate > (priv->LastRetryRate + 50)) && (priv->FailTxRateCount > 2)) {
                        bTryDown = true;
                        priv->TryDownCountLowData += TryDownTh;
                } else if ((CurrRetryRate < 22) && (priv->LastRetryRate < 23)) { /* TO DO: need to consider (RSSI) */
                        bTryUp = true;
                }
        } else if (priv->CurrentOperaRate == 22) {
                /* 2For 11Mbps */
                if (CurrRetryRate > 95) {
                        bTryDown = true;
                } else if ((CurrRetryRate < 29) && (priv->LastRetryRate < 30)) { /*TO DO: need to consider (RSSI) */
                        bTryUp = true;
                }
        } else if (priv->CurrentOperaRate == 11) {
                /* 2For 5.5Mbps */
                if (CurrRetryRate > 149) {
                        bTryDown = true;
                } else if ((CurrRetryRate < 60) && (priv->LastRetryRate < 65)) {
                        bTryUp = true;
                }
        } else if (priv->CurrentOperaRate == 4) {
                /* 2For 2 Mbps */
                if ((CurrRetryRate > 99) && (priv->LastRetryRate > 99)) {
                        bTryDown = true;
                } else if ((CurrRetryRate < 65) && (priv->LastRetryRate < 70)) {
                        bTryUp = true;
                }
        } else if (priv->CurrentOperaRate == 2) {
                /* 2For 1 Mbps */
                if ((CurrRetryRate < 70) && (priv->LastRetryRate < 75)) {
                        bTryUp = true;
                }
        }

        if (bTryUp && bTryDown)
                printk("StaRateAdaptive87B(): Tx Rate tried upping and downing simultaneously!\n");

        /* 1 Test Upgrading Tx Rate
         * Sometimes the cause of the low throughput (high retry rate) is the compatibility between the AP and NIC.
         * To test if the upper rate may cause lower retry rate, this mechanism randomly occurs to test upgrading tx rate.
         */
        if (!bTryUp && !bTryDown && (priv->TryupingCount == 0) && (priv->TryDownCountLowData == 0)
                && priv->CurrentOperaRate != priv->ieee80211->current_network.HighestOperaRate && priv->FailTxRateCount < 2) {
                if (jiffies % (CurrRetryRate + 101) == 0) {
                        bTryUp = true;
                        priv->bTryuping = true;
                }
        }

        /* 1 Rate Mechanism */
        if (bTryUp) {
                priv->TryupingCount++;
                priv->TryDownCountLowData = 0;

                /*
                 * Check more times if we need to upgrade indeed.
                 * Because the largest value of pHalData->TryupingCount is 0xFFFF and
                 * the largest value of pHalData->FailTxRateCount is 0x14,
                 * this condition will be satisfied at most every 2 min.
                 */

                if ((priv->TryupingCount > (TryUpTh + priv->FailTxRateCount * priv->FailTxRateCount)) ||
                        (CurrSignalStrength > priv->LastFailTxRateSS) || priv->bTryuping) {
                        priv->TryupingCount = 0;
                        /*
                         * When transferring from CCK to OFDM, DIG is an important issue.
                         */
                        if (priv->CurrentOperaRate == 22)
                                bUpdateInitialGain = true;

                        /*
                         * The difference in throughput between 48Mbps and 36Mbps is 8M.
                         * So, we must be careful in this rate scale. Isaiah 2008-02-15.
                         */
                        if (((priv->CurrentOperaRate == 72) || (priv->CurrentOperaRate == 48) || (priv->CurrentOperaRate == 36)) &&
                                (priv->FailTxRateCount > 2))
                                priv->RateAdaptivePeriod = (RATE_ADAPTIVE_TIMER_PERIOD / 2);

                        /* (1)To avoid upgrade frequently to the fail tx rate, add the FailTxRateCount into the threshold. */
                        /* (2)If the signal strength is increased, it may be able to upgrade. */

                        priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);

                        if (priv->CurrentOperaRate == 36) {
                                priv->bUpdateARFR = true;
                                write_nic_word(dev, ARFR, 0x0F8F); /* bypass 12/9/6 */
                        } else if (priv->bUpdateARFR) {
                                priv->bUpdateARFR = false;
                                write_nic_word(dev, ARFR, 0x0FFF); /* set 1M ~ 54Mbps. */
                        }

                        /* Update Fail Tx rate and count. */
                        if (priv->LastFailTxRate != priv->CurrentOperaRate) {
                                priv->LastFailTxRate = priv->CurrentOperaRate;
                                priv->FailTxRateCount = 0;
                                priv->LastFailTxRateSS = -200; /* Set lowest power. */
                        }
                }
        } else {
                if (priv->TryupingCount > 0)
                        priv->TryupingCount--;
        }

        if (bTryDown) {
                priv->TryDownCountLowData++;
                priv->TryupingCount = 0;

                /* Check if Tx rate can be degraded or Test trying upgrading should fallback. */
                if (priv->TryDownCountLowData > TryDownTh || priv->bTryuping) {
                        priv->TryDownCountLowData = 0;
                        priv->bTryuping = false;
                        /* Update fail information. */
                        if (priv->LastFailTxRate == priv->CurrentOperaRate) {
                                priv->FailTxRateCount++;
                                /* Record the Tx fail rate signal strength. */
                                if (CurrSignalStrength > priv->LastFailTxRateSS)
                                        priv->LastFailTxRateSS = CurrSignalStrength;
                        } else {
                                priv->LastFailTxRate = priv->CurrentOperaRate;
                                priv->FailTxRateCount = 1;
                                priv->LastFailTxRateSS = CurrSignalStrength;
                        }
                        priv->CurrentOperaRate = GetDegradeTxRate(dev, priv->CurrentOperaRate);

                        /* Reduce chariot training time at weak signal strength situation. SD3 ED demand. */
                        if ((CurrSignalStrength < -80) && (priv->CurrentOperaRate > 72)) {
                                priv->CurrentOperaRate = 72;
                        }

                        if (priv->CurrentOperaRate == 36) {
                                priv->bUpdateARFR = true;
                                write_nic_word(dev, ARFR, 0x0F8F); /* bypass 12/9/6 */
                        } else if (priv->bUpdateARFR) {
                                priv->bUpdateARFR = false;
                                write_nic_word(dev, ARFR, 0x0FFF); /* set 1M ~ 54Mbps. */
                        }

                        /*
                         * When it is CCK rate, it may need to update initial gain to receive lower power packets.
                         */
                        if (MgntIsCckRate(priv->CurrentOperaRate)) {
                                bUpdateInitialGain = true;
                        }
                }
        } else {
                if (priv->TryDownCountLowData > 0)
                        priv->TryDownCountLowData--;
        }

        /*
         * Keep the Tx fail rate count to equal to 0x15 at most.
         * Reduce the fail count at least to 10 sec if tx rate is tending stable.
         */
        if (priv->FailTxRateCount >= 0x15 ||
                (!bTryUp && !bTryDown && priv->TryDownCountLowData == 0 && priv->TryupingCount && priv->FailTxRateCount > 0x6)) {
                priv->FailTxRateCount--;
        }


        OfdmTxPwrIdx  = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
        CckTxPwrIdx  = priv->chtxpwr[priv->ieee80211->current_network.channel];

        /* Mac0x9e increase 2 level in 36M~18M situation */
        if ((priv->CurrentOperaRate < 96) && (priv->CurrentOperaRate > 22)) {
                u1bCck = read_nic_byte(dev, CCK_TXAGC);
                u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);

                /* case 1: Never enter High power */
                if (u1bCck == CckTxPwrIdx) {
                        if (u1bOfdm != (OfdmTxPwrIdx + 2)) {
                        priv->bEnhanceTxPwr = true;
                        u1bOfdm = ((u1bOfdm + 2) > 35) ? 35 : (u1bOfdm + 2);
                        write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
                        }
                } else if (u1bCck < CckTxPwrIdx) {
                /* case 2: enter high power */
                        if (!priv->bEnhanceTxPwr) {
                                priv->bEnhanceTxPwr = true;
                                u1bOfdm = ((u1bOfdm + 2) > 35) ? 35 : (u1bOfdm + 2);
                                write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
                        }
                }
        } else if (priv->bEnhanceTxPwr) {  /* 54/48/11/5.5/2/1 */
                u1bCck = read_nic_byte(dev, CCK_TXAGC);
                u1bOfdm = read_nic_byte(dev, OFDM_TXAGC);

                /* case 1: Never enter High power */
                if (u1bCck == CckTxPwrIdx) {
                        priv->bEnhanceTxPwr = false;
                        write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
                }
                /* case 2: enter high power */
                else if (u1bCck < CckTxPwrIdx) {
                        priv->bEnhanceTxPwr = false;
                        u1bOfdm = ((u1bOfdm - 2) > 0) ? (u1bOfdm - 2) : 0;
                        write_nic_byte(dev, OFDM_TXAGC, u1bOfdm);
                }
        }

        /*
         * We need update initial gain when we set tx rate "from OFDM to CCK" or
         * "from CCK to OFDM".
         */
SetInitialGain:
        if (bUpdateInitialGain) {
                if (MgntIsCckRate(priv->CurrentOperaRate)) { /* CCK */
                        if (priv->InitialGain > priv->RegBModeGainStage) {
                                priv->InitialGainBackUp = priv->InitialGain;

                                if (CurrSignalStrength < -85) /* Low power, OFDM [0x17] = 26. */
                                        /* SD3 SYs suggest that CurrSignalStrength < -65, ofdm 0x17=26. */
                                        priv->InitialGain = priv->RegBModeGainStage;

                                else if (priv->InitialGain > priv->RegBModeGainStage + 1)
                                        priv->InitialGain -= 2;

                                else
                                        priv->InitialGain--;

                                printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n", priv->InitialGain, priv->CurrentOperaRate);
                                UpdateInitialGain(dev);
                        }
                } else { /* OFDM */
                        if (priv->InitialGain < 4) {
                                priv->InitialGainBackUp = priv->InitialGain;

                                priv->InitialGain++;
                                printk("StaRateAdaptive87SE(): update init_gain to index %d for date rate %d\n", priv->InitialGain, priv->CurrentOperaRate);
                                UpdateInitialGain(dev);
                        }
                }
        }

        /* Record the related info */
        priv->LastRetryRate = CurrRetryRate;
        priv->LastTxThroughput = TxThroughput;
        priv->ieee80211->rate = priv->CurrentOperaRate * 5;
}

void rtl8180_rate_adapter(struct work_struct *work)
{
        struct delayed_work *dwork = to_delayed_work(work);
        struct ieee80211_device *ieee = container_of(dwork, struct ieee80211_device, rate_adapter_wq);
        struct net_device *dev = ieee->dev;
        StaRateAdaptive87SE(dev);
}
void timer_rate_adaptive(unsigned long data)
{
        struct r8180_priv *priv = ieee80211_priv((struct net_device *)data);
        if (!priv->up) {
                return;
        }
        if ((priv->ieee80211->iw_mode != IW_MODE_MASTER)
                        && (priv->ieee80211->state == IEEE80211_LINKED) &&
                        (priv->ForcedDataRate == 0)) {
                queue_work(priv->ieee80211->wq, (void *)&priv->ieee80211->rate_adapter_wq);
        }
        priv->rateadapter_timer.expires = jiffies + MSECS(priv->RateAdaptivePeriod);
        add_timer(&priv->rateadapter_timer);
}

void SwAntennaDiversityRxOk8185(struct net_device *dev, u8 SignalStrength)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);

        priv->AdRxOkCnt++;

        if (priv->AdRxSignalStrength != -1) {
                priv->AdRxSignalStrength = ((priv->AdRxSignalStrength * 7) + (SignalStrength * 3)) / 10;
        } else { /* Initialization case. */
                priv->AdRxSignalStrength = SignalStrength;
        }

        if (priv->LastRxPktAntenna) /* Main antenna. */
                priv->AdMainAntennaRxOkCnt++;
        else     /* Aux antenna. */
                priv->AdAuxAntennaRxOkCnt++;
}
 /*     Change Antenna Switch. */
bool SetAntenna8185(struct net_device *dev, u8 u1bAntennaIndex)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
        bool bAntennaSwitched = false;

        switch (u1bAntennaIndex) {
        case 0:
                /* Mac register, main antenna */
                write_nic_byte(dev, ANTSEL, 0x03);
                /* base band */
                write_phy_cck(dev, 0x11, 0x9b); /* Config CCK RX antenna. */
                write_phy_ofdm(dev, 0x0d, 0x5c); /* Config OFDM RX antenna. */

                bAntennaSwitched = true;
                break;

        case 1:
                /* Mac register, aux antenna */
                write_nic_byte(dev, ANTSEL, 0x00);
                /* base band */
                write_phy_cck(dev, 0x11, 0xbb); /* Config CCK RX antenna. */
                write_phy_ofdm(dev, 0x0d, 0x54); /* Config OFDM RX antenna. */

                bAntennaSwitched = true;

                break;

        default:
                printk("SetAntenna8185: unknown u1bAntennaIndex(%d)\n", u1bAntennaIndex);
                break;
        }

        if (bAntennaSwitched)
                priv->CurrAntennaIndex = u1bAntennaIndex;

        return bAntennaSwitched;
}
 /*     Toggle Antenna switch. */
bool SwitchAntenna(struct net_device *dev)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);

        bool            bResult;

        if (priv->CurrAntennaIndex == 0) {
                bResult = SetAntenna8185(dev, 1);
        } else {
                bResult = SetAntenna8185(dev, 0);
        }

        return bResult;
}
/*
 * Engine of SW Antenna Diversity mechanism.
 * Since 8187 has no Tx part information,
 * this implementation is only dependend on Rx part information.
 */
void SwAntennaDiversity(struct net_device *dev)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
        bool   bSwCheckSS = false;
        if (bSwCheckSS) {
                priv->AdTickCount++;

                printk("(1) AdTickCount: %d, AdCheckPeriod: %d\n",
                        priv->AdTickCount, priv->AdCheckPeriod);
                printk("(2) AdRxSignalStrength: %ld, AdRxSsThreshold: %ld\n",
                        priv->AdRxSignalStrength, priv->AdRxSsThreshold);
        }

        /* Case 1. No Link. */
        if (priv->ieee80211->state != IEEE80211_LINKED) {
                priv->bAdSwitchedChecking = false;
                /* I switch antenna here to prevent any one of antenna is broken before link established, 2006.04.18, by rcnjko.. */
                SwitchAntenna(dev);

          /* Case 2. Linked but no packet receive.d */
        } else if (priv->AdRxOkCnt == 0) {
                priv->bAdSwitchedChecking = false;
                SwitchAntenna(dev);

          /* Case 3. Evaluate last antenna switch action and undo it if necessary. */
        } else if (priv->bAdSwitchedChecking == true) {
                priv->bAdSwitchedChecking = false;

                /* Adjust Rx signal strength threshold. */
                priv->AdRxSsThreshold = (priv->AdRxSignalStrength + priv->AdRxSsBeforeSwitched) / 2;

                priv->AdRxSsThreshold = (priv->AdRxSsThreshold > priv->AdMaxRxSsThreshold) ?
                                        priv->AdMaxRxSsThreshold : priv->AdRxSsThreshold;
                if (priv->AdRxSignalStrength < priv->AdRxSsBeforeSwitched) {
                /* Rx signal strength is not improved after we swtiched antenna. => Swich back. */
                        /* Increase Antenna Diversity checking period due to bad decision. */
                        priv->AdCheckPeriod *= 2;
                        /* Increase Antenna Diversity checking period. */
                        if (priv->AdCheckPeriod > priv->AdMaxCheckPeriod)
                                priv->AdCheckPeriod = priv->AdMaxCheckPeriod;

                        /* Wrong decision => switch back. */
                        SwitchAntenna(dev);
                } else {
                /* Rx Signal Strength is improved. */

                        /* Reset Antenna Diversity checking period to its min value. */
                        priv->AdCheckPeriod = priv->AdMinCheckPeriod;
                }

        }
        /* Case 4. Evaluate if we shall switch antenna now. */
        /* Cause Table Speed is very fast in TRC Dell Lab, we check it every time. */
        else {
                priv->AdTickCount = 0;

                /*
                 * <Roger_Notes> We evaluate RxOk counts for each antenna first and than
                 * evaluate signal strength.
                 * The following operation can overcome the disability of CCA on both two antennas
                 * When signal strength was extremely low or high.
                 * 2008.01.30.
                 */

                /*
                 * Evaluate RxOk count from each antenna if we shall switch default antenna now.
                 */
                if ((priv->AdMainAntennaRxOkCnt < priv->AdAuxAntennaRxOkCnt)
                        && (priv->CurrAntennaIndex == 0)) {
                /* We set Main antenna as default but RxOk count was less than Aux ones. */

                        /* Switch to Aux antenna. */
                        SwitchAntenna(dev);
                        priv->bHWAdSwitched = true;
                } else if ((priv->AdAuxAntennaRxOkCnt < priv->AdMainAntennaRxOkCnt)
                        && (priv->CurrAntennaIndex == 1)) {
                /* We set Aux antenna as default but RxOk count was less than Main ones. */

                        /* Switch to Main antenna. */
                        SwitchAntenna(dev);
                        priv->bHWAdSwitched = true;
                } else {
                /* Default antenna is better. */

                        /* Still need to check current signal strength. */
                        priv->bHWAdSwitched = false;
                }
                /*
                 * <Roger_Notes> We evaluate Rx signal strength ONLY when default antenna
                 * didn't change by HW evaluation.
                 * 2008.02.27.
                 *
                 * [TRC Dell Lab] SignalStrength is inaccuracy. Isaiah 2008-03-05
                 * For example, Throughput of aux is better than main antenna(about 10M v.s 2M),
                 * but AdRxSignalStrength is less than main.
                 * Our guess is that main antenna have lower throughput and get many change
                 * to receive more CCK packets(ex.Beacon) which have stronger SignalStrength.
                 */
                if ((!priv->bHWAdSwitched) && (bSwCheckSS)) {
                        /* Evaluate Rx signal strength if we shall switch antenna now. */
                        if (priv->AdRxSignalStrength < priv->AdRxSsThreshold) {
                        /* Rx signal strength is weak => Switch Antenna. */
                                priv->AdRxSsBeforeSwitched = priv->AdRxSignalStrength;
                                priv->bAdSwitchedChecking = true;

                                SwitchAntenna(dev);
                        } else {
                        /* Rx signal strength is OK. */
                                priv->bAdSwitchedChecking = false;
                                /* Increase Rx signal strength threshold if necessary. */
                                if ((priv->AdRxSignalStrength > (priv->AdRxSsThreshold + 10)) && /* Signal is much stronger than current threshold */
                                        priv->AdRxSsThreshold <= priv->AdMaxRxSsThreshold) { /* Current threhold is not yet reach upper limit. */

                                        priv->AdRxSsThreshold = (priv->AdRxSsThreshold + priv->AdRxSignalStrength) / 2;
                                        priv->AdRxSsThreshold = (priv->AdRxSsThreshold > priv->AdMaxRxSsThreshold) ?
                                                                priv->AdMaxRxSsThreshold : priv->AdRxSsThreshold;/* +by amy 080312 */
                                }

                                /* Reduce Antenna Diversity checking period if possible. */
                                if (priv->AdCheckPeriod > priv->AdMinCheckPeriod)
                                        priv->AdCheckPeriod /= 2;
                        }
                }
        }
        /* Reset antenna diversity Rx related statistics. */
        priv->AdRxOkCnt = 0;
        priv->AdMainAntennaRxOkCnt = 0;
        priv->AdAuxAntennaRxOkCnt = 0;
}

 /*     Return TRUE if we shall perform Tx Power Tracking Mechanism, FALSE otherwise. */
bool CheckTxPwrTracking(struct net_device *dev)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);

        if (!priv->bTxPowerTrack)
                return false;

        /* if 87SE is in High Power , don't do Tx Power Tracking. asked by SD3 ED. 2008-08-08 Isaiah */
        if (priv->bToUpdateTxPwr)
                return false;

        return true;
}


 /*     Timer callback function of SW Antenna Diversity. */
void SwAntennaDiversityTimerCallback(struct net_device *dev)
{
        struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
        RT_RF_POWER_STATE rtState;

         /* We do NOT need to switch antenna while RF is off. */
        rtState = priv->eRFPowerState;
        do {
                if (rtState == eRfOff) {
                        break;
                } else if (rtState == eRfSleep) {
                        /* Don't access BB/RF under Disable PLL situation. */
                        break;
                }
                SwAntennaDiversity(dev);

        } while (false);

        if (priv->up) {
                priv->SwAntennaDiversityTimer.expires = jiffies + MSECS(ANTENNA_DIVERSITY_TIMER_PERIOD);
                add_timer(&priv->SwAntennaDiversityTimer);
        }
}