1142 lines
34 KiB
C
1142 lines
34 KiB
C
#include "r8180_dm.h"
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#include "r8180_hw.h"
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#include "r8180_93cx6.h"
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/* Return TRUE if we shall perform High Power Mechanism, FALSE otherwise. */
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#define RATE_ADAPTIVE_TIMER_PERIOD 300
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bool CheckHighPower(struct net_device *dev)
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{
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struct r8180_priv *priv = ieee80211_priv(dev);
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struct ieee80211_device *ieee = priv->ieee80211;
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if(!priv->bRegHighPowerMechanism)
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return false;
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if(ieee->state == IEEE80211_LINKED_SCANNING)
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return false;
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return true;
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}
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/*
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* Description:
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* Update Tx power level if necessary.
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* See also DoRxHighPower() and SetTxPowerLevel8185() for reference.
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*
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* Note:
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* The reason why we udpate Tx power level here instead of DoRxHighPower()
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* is the number of IO to change Tx power is much more than channel TR switch
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* and they are related to OFDM and MAC registers.
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* So, we don't want to update it so frequently in per-Rx packet base.
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*/
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void DoTxHighPower(struct net_device *dev)
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{
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struct r8180_priv *priv = ieee80211_priv(dev);
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u16 HiPwrUpperTh = 0;
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u16 HiPwrLowerTh = 0;
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u8 RSSIHiPwrUpperTh;
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u8 RSSIHiPwrLowerTh;
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u8 u1bTmp;
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char OfdmTxPwrIdx, CckTxPwrIdx;
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HiPwrUpperTh = priv->RegHiPwrUpperTh;
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HiPwrLowerTh = priv->RegHiPwrLowerTh;
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HiPwrUpperTh = HiPwrUpperTh * 10;
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HiPwrLowerTh = HiPwrLowerTh * 10;
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RSSIHiPwrUpperTh = priv->RegRSSIHiPwrUpperTh;
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RSSIHiPwrLowerTh = priv->RegRSSIHiPwrLowerTh;
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/* lzm add 080826 */
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OfdmTxPwrIdx = priv->chtxpwr_ofdm[priv->ieee80211->current_network.channel];
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CckTxPwrIdx = priv->chtxpwr[priv->ieee80211->current_network.channel];
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if ((priv->UndecoratedSmoothedSS > HiPwrUpperTh) ||
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(priv->bCurCCKPkt && (priv->CurCCKRSSI > RSSIHiPwrUpperTh))) {
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/* Stevenl suggested that degrade 8dbm in high power sate. 2007-12-04 Isaiah */
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priv->bToUpdateTxPwr = true;
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u1bTmp= read_nic_byte(dev, CCK_TXAGC);
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/* If it never enter High Power. */
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if (CckTxPwrIdx == u1bTmp) {
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u1bTmp = (u1bTmp > 16) ? (u1bTmp -16): 0; /* 8dbm */
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write_nic_byte(dev, CCK_TXAGC, u1bTmp);
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u1bTmp= read_nic_byte(dev, OFDM_TXAGC);
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u1bTmp = (u1bTmp > 16) ? (u1bTmp -16): 0; /* 8dbm */
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write_nic_byte(dev, OFDM_TXAGC, u1bTmp);
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}
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} else if ((priv->UndecoratedSmoothedSS < HiPwrLowerTh) &&
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(!priv->bCurCCKPkt || priv->CurCCKRSSI < RSSIHiPwrLowerTh)) {
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if (priv->bToUpdateTxPwr) {
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priv->bToUpdateTxPwr = false;
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/* SD3 required. */
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u1bTmp= read_nic_byte(dev, CCK_TXAGC);
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if (u1bTmp < CckTxPwrIdx) {
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write_nic_byte(dev, CCK_TXAGC, CckTxPwrIdx);
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}
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u1bTmp= read_nic_byte(dev, OFDM_TXAGC);
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if (u1bTmp < OfdmTxPwrIdx) {
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write_nic_byte(dev, OFDM_TXAGC, OfdmTxPwrIdx);
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}
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}
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}
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}
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/*
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* Description:
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* Callback function of UpdateTxPowerWorkItem.
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* Because of some event happened, e.g. CCX TPC, High Power Mechanism,
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* We update Tx power of current channel again.
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*/
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void rtl8180_tx_pw_wq(struct work_struct *work)
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{
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struct delayed_work *dwork = to_delayed_work(work);
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struct ieee80211_device *ieee = container_of(dwork,struct ieee80211_device,tx_pw_wq);
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struct net_device *dev = ieee->dev;
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DoTxHighPower(dev);
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}
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/*
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* Return TRUE if we shall perform DIG Mechanism, FALSE otherwise.
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*/
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bool CheckDig(struct net_device *dev)
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{
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struct r8180_priv *priv = ieee80211_priv(dev);
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struct ieee80211_device *ieee = priv->ieee80211;
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if (!priv->bDigMechanism)
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return false;
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if (ieee->state != IEEE80211_LINKED)
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return false;
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if ((priv->ieee80211->rate / 5) < 36) /* Schedule Dig under all OFDM rates. By Bruce, 2007-06-01. */
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return false;
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return true;
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}
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/*
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* Implementation of DIG for Zebra and Zebra2.
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*/
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void DIG_Zebra(struct net_device *dev)
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{
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struct r8180_priv *priv = ieee80211_priv(dev);
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u16 CCKFalseAlarm, OFDMFalseAlarm;
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u16 OfdmFA1, OfdmFA2;
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int InitialGainStep = 7; /* The number of initial gain stages. */
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int LowestGainStage = 4; /* The capable lowest stage of performing dig workitem. */
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u32 AwakePeriodIn2Sec = 0;
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CCKFalseAlarm = (u16)(priv->FalseAlarmRegValue & 0x0000ffff);
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OFDMFalseAlarm = (u16)((priv->FalseAlarmRegValue >> 16) & 0x0000ffff);
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OfdmFA1 = 0x15;
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OfdmFA2 = ((u16)(priv->RegDigOfdmFaUpTh)) << 8;
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/* The number of initial gain steps is different, by Bruce, 2007-04-13. */
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if (priv->InitialGain == 0) { /* autoDIG */
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/* Advised from SD3 DZ */
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priv->InitialGain = 4; /* In 87B, m74dBm means State 4 (m82dBm) */
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}
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/* Advised from SD3 DZ */
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OfdmFA1 = 0x20;
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#if 1 /* lzm reserved 080826 */
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AwakePeriodIn2Sec = (2000 - priv->DozePeriodInPast2Sec);
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priv ->DozePeriodInPast2Sec = 0;
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if (AwakePeriodIn2Sec) {
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OfdmFA1 = (u16)((OfdmFA1 * AwakePeriodIn2Sec) / 2000) ;
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OfdmFA2 = (u16)((OfdmFA2 * AwakePeriodIn2Sec) / 2000) ;
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} else {
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;
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}
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#endif
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InitialGainStep = 8;
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LowestGainStage = priv->RegBModeGainStage; /* Lowest gain stage. */
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if (OFDMFalseAlarm > OfdmFA1) {
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if (OFDMFalseAlarm > OfdmFA2) {
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priv->DIG_NumberFallbackVote++;
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if (priv->DIG_NumberFallbackVote > 1) {
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/* serious OFDM False Alarm, need fallback */
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if (priv->InitialGain < InitialGainStep) {
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priv->InitialGainBackUp = priv->InitialGain;
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priv->InitialGain = (priv->InitialGain + 1);
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UpdateInitialGain(dev);
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}
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priv->DIG_NumberFallbackVote = 0;
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priv->DIG_NumberUpgradeVote = 0;
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}
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} else {
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if (priv->DIG_NumberFallbackVote)
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priv->DIG_NumberFallbackVote--;
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}
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priv->DIG_NumberUpgradeVote = 0;
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} else {
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if (priv->DIG_NumberFallbackVote)
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priv->DIG_NumberFallbackVote--;
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priv->DIG_NumberUpgradeVote++;
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if (priv->DIG_NumberUpgradeVote > 9) {
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if (priv->InitialGain > LowestGainStage) { /* In 87B, m78dBm means State 4 (m864dBm) */
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priv->InitialGainBackUp = priv->InitialGain;
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priv->InitialGain = (priv->InitialGain - 1);
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UpdateInitialGain(dev);
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}
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priv->DIG_NumberFallbackVote = 0;
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priv->DIG_NumberUpgradeVote = 0;
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}
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}
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}
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/*
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* Dispatch DIG implementation according to RF.
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*/
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void DynamicInitGain(struct net_device *dev)
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{
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DIG_Zebra(dev);
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}
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void rtl8180_hw_dig_wq(struct work_struct *work)
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{
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struct delayed_work *dwork = to_delayed_work(work);
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struct ieee80211_device *ieee = container_of(dwork,struct ieee80211_device,hw_dig_wq);
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struct net_device *dev = ieee->dev;
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struct r8180_priv *priv = ieee80211_priv(dev);
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/* Read CCK and OFDM False Alarm. */
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priv->FalseAlarmRegValue = read_nic_dword(dev, CCK_FALSE_ALARM);
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/* Adjust Initial Gain dynamically. */
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DynamicInitGain(dev);
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}
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int IncludedInSupportedRates(struct r8180_priv *priv, u8 TxRate)
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{
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u8 rate_len;
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u8 rate_ex_len;
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u8 RateMask = 0x7F;
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u8 idx;
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unsigned short Found = 0;
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u8 NaiveTxRate = TxRate&RateMask;
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rate_len = priv->ieee80211->current_network.rates_len;
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rate_ex_len = priv->ieee80211->current_network.rates_ex_len;
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for (idx=0; idx < rate_len; idx++) {
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if ((priv->ieee80211->current_network.rates[idx] & RateMask) == NaiveTxRate) {
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Found = 1;
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goto found_rate;
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}
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}
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for (idx = 0; idx < rate_ex_len; idx++) {
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if ((priv->ieee80211->current_network.rates_ex[idx] & RateMask) == NaiveTxRate) {
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Found = 1;
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goto found_rate;
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}
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}
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return Found;
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found_rate:
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return Found;
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}
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/*
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* Get the Tx rate one degree up form the input rate in the supported rates.
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* Return the upgrade rate if it is successed, otherwise return the input rate.
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*/
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u8 GetUpgradeTxRate(struct net_device *dev, u8 rate)
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{
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struct r8180_priv *priv = ieee80211_priv(dev);
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u8 UpRate;
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/* Upgrade 1 degree. */
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switch (rate) {
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case 108: /* Up to 54Mbps. */
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UpRate = 108;
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break;
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case 96: /* Up to 54Mbps. */
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UpRate = 108;
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break;
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case 72: /* Up to 48Mbps. */
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UpRate = 96;
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break;
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case 48: /* Up to 36Mbps. */
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UpRate = 72;
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break;
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case 36: /* Up to 24Mbps. */
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UpRate = 48;
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break;
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case 22: /* Up to 18Mbps. */
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UpRate = 36;
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break;
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case 11: /* Up to 11Mbps. */
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UpRate = 22;
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break;
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case 4: /* Up to 5.5Mbps. */
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UpRate = 11;
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break;
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case 2: /* Up to 2Mbps. */
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UpRate = 4;
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break;
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default:
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printk("GetUpgradeTxRate(): Input Tx Rate(%d) is undefined!\n", rate);
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return rate;
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}
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/* Check if the rate is valid. */
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if (IncludedInSupportedRates(priv, UpRate)) {
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return UpRate;
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} else {
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return rate;
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}
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return rate;
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}
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/*
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* Get the Tx rate one degree down form the input rate in the supported rates.
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* Return the degrade rate if it is successed, otherwise return the input rate.
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*/
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u8 GetDegradeTxRate(struct net_device *dev, u8 rate)
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{
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struct r8180_priv *priv = ieee80211_priv(dev);
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u8 DownRate;
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/* Upgrade 1 degree. */
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switch (rate) {
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case 108: /* Down to 48Mbps. */
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DownRate = 96;
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break;
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case 96: /* Down to 36Mbps. */
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DownRate = 72;
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break;
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case 72: /* Down to 24Mbps. */
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DownRate = 48;
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break;
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case 48: /* Down to 18Mbps. */
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DownRate = 36;
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break;
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case 36: /* Down to 11Mbps. */
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DownRate = 22;
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break;
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case 22: /* Down to 5.5Mbps. */
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DownRate = 11;
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break;
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case 11: /* Down to 2Mbps. */
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DownRate = 4;
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break;
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case 4: /* Down to 1Mbps. */
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DownRate = 2;
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break;
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case 2: /* Down to 1Mbps. */
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DownRate = 2;
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break;
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default:
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printk("GetDegradeTxRate(): Input Tx Rate(%d) is undefined!\n", rate);
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return rate;
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}
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/* Check if the rate is valid. */
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if (IncludedInSupportedRates(priv, DownRate)) {
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return DownRate;
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} else {
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return rate;
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}
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return rate;
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}
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/*
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* Helper function to determine if specified data rate is
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* CCK rate.
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*/
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bool MgntIsCckRate(u16 rate)
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{
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bool bReturn = false;
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if ((rate <= 22) && (rate != 12) && (rate != 18)) {
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bReturn = true;
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}
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return bReturn;
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}
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/*
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* Description:
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* Tx Power tracking mechanism routine on 87SE.
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*/
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void TxPwrTracking87SE(struct net_device *dev)
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{
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struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
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u8 tmpu1Byte, CurrentThermal, Idx;
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char CckTxPwrIdx, OfdmTxPwrIdx;
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tmpu1Byte = read_nic_byte(dev, EN_LPF_CAL);
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CurrentThermal = (tmpu1Byte & 0xf0) >> 4; /*[ 7:4]: thermal meter indication. */
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CurrentThermal = (CurrentThermal > 0x0c) ? 0x0c:CurrentThermal;/* lzm add 080826 */
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if (CurrentThermal != priv->ThermalMeter) {
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/* Update Tx Power level on each channel. */
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for (Idx = 1; Idx < 15; Idx++) {
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CckTxPwrIdx = priv->chtxpwr[Idx];
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OfdmTxPwrIdx = priv->chtxpwr_ofdm[Idx];
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if (CurrentThermal > priv->ThermalMeter) {
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/* higher thermal meter. */
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CckTxPwrIdx += (CurrentThermal - priv->ThermalMeter) * 2;
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OfdmTxPwrIdx += (CurrentThermal - priv->ThermalMeter) * 2;
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if (CckTxPwrIdx > 35)
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CckTxPwrIdx = 35; /* Force TxPower to maximal index. */
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if (OfdmTxPwrIdx > 35)
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OfdmTxPwrIdx = 35;
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} else {
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/* lower thermal meter. */
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CckTxPwrIdx -= (priv->ThermalMeter - CurrentThermal) * 2;
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OfdmTxPwrIdx -= (priv->ThermalMeter - CurrentThermal) * 2;
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if (CckTxPwrIdx < 0)
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CckTxPwrIdx = 0;
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if (OfdmTxPwrIdx < 0)
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OfdmTxPwrIdx = 0;
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}
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/* Update TxPower level on CCK and OFDM resp. */
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priv->chtxpwr[Idx] = CckTxPwrIdx;
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priv->chtxpwr_ofdm[Idx] = OfdmTxPwrIdx;
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}
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/* Update TxPower level immediately. */
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rtl8225z2_SetTXPowerLevel(dev, priv->ieee80211->current_network.channel);
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}
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priv->ThermalMeter = CurrentThermal;
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}
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void StaRateAdaptive87SE(struct net_device *dev)
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{
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struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
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unsigned long CurrTxokCnt;
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u16 CurrRetryCnt;
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u16 CurrRetryRate;
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unsigned long CurrRxokCnt;
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bool bTryUp = false;
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bool bTryDown = false;
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u8 TryUpTh = 1;
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u8 TryDownTh = 2;
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u32 TxThroughput;
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long CurrSignalStrength;
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bool bUpdateInitialGain = false;
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u8 u1bOfdm = 0, u1bCck = 0;
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char OfdmTxPwrIdx, CckTxPwrIdx;
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priv->RateAdaptivePeriod = RATE_ADAPTIVE_TIMER_PERIOD;
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CurrRetryCnt = priv->CurrRetryCnt;
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CurrTxokCnt = priv->NumTxOkTotal - priv->LastTxokCnt;
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CurrRxokCnt = priv->ieee80211->NumRxOkTotal - priv->LastRxokCnt;
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CurrSignalStrength = priv->Stats_RecvSignalPower;
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TxThroughput = (u32)(priv->NumTxOkBytesTotal - priv->LastTxOKBytes);
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priv->LastTxOKBytes = priv->NumTxOkBytesTotal;
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priv->CurrentOperaRate = priv->ieee80211->rate / 5;
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/* 2 Compute retry ratio. */
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if (CurrTxokCnt > 0) {
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CurrRetryRate = (u16)(CurrRetryCnt * 100 / CurrTxokCnt);
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} else {
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/* It may be serious retry. To distinguish serious retry or no packets modified by Bruce */
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CurrRetryRate = (u16)(CurrRetryCnt * 100 / 1);
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}
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priv->LastRetryCnt = priv->CurrRetryCnt;
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priv->LastTxokCnt = priv->NumTxOkTotal;
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priv->LastRxokCnt = priv->ieee80211->NumRxOkTotal;
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priv->CurrRetryCnt = 0;
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/* 2No Tx packets, return to init_rate or not? */
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if (CurrRetryRate == 0 && CurrTxokCnt == 0) {
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/*
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* After 9 (30*300ms) seconds in this condition, we try to raise rate.
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*/
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priv->TryupingCountNoData++;
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/* [TRC Dell Lab] Extend raised period from 4.5sec to 9sec, Isaiah 2008-02-15 18:00 */
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if (priv->TryupingCountNoData > 30) {
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priv->TryupingCountNoData = 0;
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priv->CurrentOperaRate = GetUpgradeTxRate(dev, priv->CurrentOperaRate);
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/* Reset Fail Record */
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priv->LastFailTxRate = 0;
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priv->LastFailTxRateSS = -200;
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priv->FailTxRateCount = 0;
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}
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goto SetInitialGain;
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} else {
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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);
|
|
}
|
|
}
|
|
|