/*
========================================================================
Routine Description:
Determine the current radar state
Arguments:
pAd Pointer to our adapter
Return Value:
========================================================================
*/
VOID RadarStateCheck(
IN PRTMP_ADAPTER pAd)
{
pAd->Dot11_H.CalBufTime = 0;
if ((pAd->CommonCfg.Channel > 14) &&
(pAd->CommonCfg.bIEEE80211H == 1) &&
RadarChannelCheck(pAd, pAd->CommonCfg.Channel))
{
pAd->Dot11_H.RDMode = RD_SILENCE_MODE;
pAd->Dot11_H.RDCount = 0;
pAd->Dot11_H.InServiceMonitorCount = 0;
}
else
pAd->Dot11_H.RDMode = RD_NORMAL_MODE;
#ifdef CARRIER_DETECTION_SUPPORT
if ((pAd->CommonCfg.RDDurRegion == JAP)
|| (pAd->CommonCfg.RDDurRegion == JAP_W53)
|| (pAd->CommonCfg.RDDurRegion == JAP_W56))
{
if ((pAd->CommonCfg.Channel > 14) ||
(pAd->CommonCfg.HtCapability.HtCapInfo.ChannelWidth == BW_40))
{
pAd->CommonCfg.CarrierDetect.Enable = TRUE;
}
}
#endif /* CARRIER_DETECTION_SUPPORT */
}
/*
========================================================================
Routine Description:
Radar wave detection. The API should be invoke each second.
Arguments:
pAd - Adapter pointer
Return Value:
None
========================================================================
*/
VOID ApRadarDetectPeriodic(
IN PRTMP_ADAPTER pAd)
{
INT i;
pAd->CommonCfg.RadarDetect.InServiceMonitorCount++;
for (i=0; i<pAd->ChannelListNum; i++)
{
if (pAd->ChannelList[i].RemainingTimeForUse > 0)
{
pAd->ChannelList[i].RemainingTimeForUse --;
if ((pAd->Mlme.PeriodicRound%5) == 0)
{
DBGPRINT(RT_DEBUG_TRACE, ("RadarDetectPeriodic - ch=%d, RemainingTimeForUse=%d\n", pAd->ChannelList[i].Channel, pAd->ChannelList[i].RemainingTimeForUse));
}
}
}
/*radar detect*/
if ((pAd->CommonCfg.Channel > 14)
&& (pAd->CommonCfg.bIEEE80211H == 1)
&& RadarChannelCheck(pAd, pAd->CommonCfg.Channel))
{
RadarDetectPeriodic(pAd);
}
return;
}
static inline UCHAR SelectClearChannelRandom(
IN PRTMP_ADAPTER pAd
)
{
UCHAR cnt, ch = 0, i;
BOOLEAN bFindIt = FALSE;
if (pAd->CommonCfg.bIEEE80211H)
{
cnt = 0;
while(TRUE)
{
cnt++;
ch = pAd->ChannelList[RandomByte2(pAd)%pAd->ChannelListNum].Channel;
if (ch == 0)
ch = FirstChannel(pAd);
// have no avaiable channel now. force pick first channel here.
if (cnt == pAd->ChannelListNum)
{
ch = FirstChannel(pAd);
break;
}
#ifdef A_BAND_SUPPORT
if (RadarChannelCheck(pAd, ch))
continue;
#endif
for (i=0; i<pAd->ChannelListNum; i++)
{
if (pAd->ChannelList[i].Channel == ch)
{
if (pAd->ChannelList[i].RemainingTimeForUse == 0)
bFindIt = TRUE;
break;
}
}
if (bFindIt == TRUE)
break;
};
}
else
{
ch = pAd->ChannelList[RandomByte2(pAd)%pAd->ChannelListNum].Channel;
if (ch == 0)
ch = FirstChannel(pAd);
}
printk("Random in A band. Select Channel %d\n",ch);
return ch;
}
/*
========================================================================
Routine Description:
Determine the current radar state
Arguments:
pAd Pointer to our adapter
Return Value:
========================================================================
*/
VOID RadarStateCheck(
IN PRTMP_ADAPTER pAd)
{
pAd->Dot11_H.CalBufTime = 0;
if ((pAd->CommonCfg.Channel > 14) &&
(pAd->CommonCfg.bIEEE80211H == 1) &&
RadarChannelCheck(pAd, pAd->CommonCfg.Channel))
{
pAd->Dot11_H.RDMode = RD_SILENCE_MODE;
pAd->Dot11_H.RDCount = 0;
pAd->Dot11_H.InServiceMonitorCount = 0;
}
else
pAd->Dot11_H.RDMode = RD_NORMAL_MODE;
}
/*
==========================================================================
Description:
Scan next channel
==========================================================================
*/
VOID ScanNextChannel(
IN PRTMP_ADAPTER pAd,
IN UCHAR OpMode)
{
UCHAR ScanType = pAd->MlmeAux.ScanType;
UINT ScanTimeIn5gChannel = SHORT_CHANNEL_TIME;
BOOLEAN ScanPending = FALSE;
RALINK_TIMER_STRUCT *sc_timer;
UINT stay_time = 0;
#ifdef RALINK_ATE
/* Nothing to do in ATE mode. */
if (ATE_ON(pAd))
return;
#endif /* RALINK_ATE */
#ifdef CONFIG_STA_SUPPORT
IF_DEV_CONFIG_OPMODE_ON_STA(pAd)
{
if (MONITOR_ON(pAd))
return;
}
ScanPending = ((pAd->StaCfg.bImprovedScan) && (pAd->StaCfg.ScanChannelCnt>=7));
#endif /* CONFIG_STA_SUPPORT */
#ifdef RT_CFG80211_SUPPORT
#ifdef CONFIG_STA_SUPPORT
if ( (pAd->pCfg80211ChanList != NULL) && (pAd->MlmeAux.Channel != 0))
{
UINT32 ChanId;
for ( ChanId = 0 ; ChanId <pAd->Cfg80211ChanListLan ; ChanId++ )
{
if ( pAd->pCfg80211ChanList[ChanId] >= pAd->MlmeAux.Channel )
{
pAd->MlmeAux.Channel = pAd->pCfg80211ChanList[ChanId];
break;
}
}
}
#endif /* CONFIG_STA_SUPPORT */
#endif /* RT_CFG80211_SUPPORT */
if ((pAd->MlmeAux.Channel == 0) || ScanPending)
{
scan_ch_restore(pAd, OpMode);
}
#ifdef RTMP_MAC_USB
#ifdef CONFIG_STA_SUPPORT
else if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_NIC_NOT_EXIST) &&
(OpMode == OPMODE_STA))
{
pAd->Mlme.SyncMachine.CurrState = SYNC_IDLE;
MlmeCntlConfirm(pAd, MT2_SCAN_CONF, MLME_FAIL_NO_RESOURCE);
}
#endif /* CONFIG_STA_SUPPORT */
#endif /* RTMP_MAC_USB */
else
{
#ifdef CONFIG_STA_SUPPORT
if (OpMode == OPMODE_STA)
{
/* BBP and RF are not accessible in PS mode, we has to wake them up first*/
if (OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_DOZE))
AsicForceWakeup(pAd, TRUE);
/* leave PSM during scanning. otherwise we may lost ProbeRsp & BEACON*/
if (pAd->StaCfg.Psm == PWR_SAVE)
RTMP_SET_PSM_BIT(pAd, PWR_ACTIVE);
}
#endif /* CONFIG_STA_SUPPORT */
AsicSwitchChannel(pAd, pAd->MlmeAux.Channel, TRUE);
AsicLockChannel(pAd, pAd->MlmeAux.Channel);
#ifdef CONFIG_STA_SUPPORT
if (OpMode == OPMODE_STA)
{
BOOLEAN bScanPassive = FALSE;
if (pAd->MlmeAux.Channel > 14)
{
if ((pAd->CommonCfg.bIEEE80211H == 1)
&& RadarChannelCheck(pAd, pAd->MlmeAux.Channel))
bScanPassive = TRUE;
}
#ifdef CARRIER_DETECTION_SUPPORT
if (pAd->CommonCfg.CarrierDetect.Enable == TRUE)
bScanPassive = TRUE;
#endif /* CARRIER_DETECTION_SUPPORT */
if (bScanPassive)
{
ScanType = SCAN_PASSIVE;
ScanTimeIn5gChannel = MIN_CHANNEL_TIME;
}
}
#endif /* CONFIG_STA_SUPPORT */
/* Check if channel if passive scan under current regulatory domain */
if (CHAN_PropertyCheck(pAd, pAd->MlmeAux.Channel, CHANNEL_PASSIVE_SCAN) == TRUE)
ScanType = SCAN_PASSIVE;
if (OpMode == OPMODE_AP)
sc_timer = &pAd->MlmeAux.APScanTimer;
else
sc_timer = &pAd->MlmeAux.ScanTimer;
/* We need to shorten active scan time in order for WZC connect issue */
/* Chnage the channel scan time for CISCO stuff based on its IAPP announcement */
if (ScanType == FAST_SCAN_ACTIVE)
stay_time = FAST_ACTIVE_SCAN_TIME;
else /* must be SCAN_PASSIVE or SCAN_ACTIVE*/
{
#ifdef CONFIG_STA_SUPPORT
pAd->StaCfg.ScanChannelCnt++;
#endif /* CONFIG_STA_SUPPORT */
#ifdef CONFIG_AP_SUPPORT
if ((OpMode == OPMODE_AP) && (pAd->ApCfg.bAutoChannelAtBootup))
stay_time = AUTO_CHANNEL_SEL_TIMEOUT;
else
#endif /* CONFIG_AP_SUPPORT */
if (WMODE_CAP_2G(pAd->CommonCfg.PhyMode) &&
WMODE_CAP_5G(pAd->CommonCfg.PhyMode))
{
if (pAd->MlmeAux.Channel > 14)
stay_time = ScanTimeIn5gChannel;
else
stay_time = MIN_CHANNEL_TIME;
}
else
stay_time = MAX_CHANNEL_TIME;
}
RTMPSetTimer(sc_timer, stay_time);
if (SCAN_MODE_ACT(ScanType))
{
if (scan_active(pAd, OpMode, ScanType) == FALSE)
return;
}
/* For SCAN_CISCO_PASSIVE, do nothing and silently wait for beacon or other probe reponse*/
#ifdef CONFIG_STA_SUPPORT
if (OpMode == OPMODE_STA)
pAd->Mlme.SyncMachine.CurrState = SCAN_LISTEN;
#endif /* CONFIG_STA_SUPPORT */
#ifdef CONFIG_AP_SUPPORT
if (OpMode == OPMODE_AP)
pAd->Mlme.ApSyncMachine.CurrState = AP_SCAN_LISTEN;
#endif /* CONFIG_AP_SUPPORT */
}
}
static inline UCHAR SelectClearChannelApCnt(
IN PRTMP_ADAPTER pAd
)
{
/*PBSSINFO pBssInfoTab = pAd->pBssInfoTab; */
PCHANNELINFO pChannelInfo = pAd->pChannelInfo;
/*BSSENTRY *pBss; */
UCHAR channel_index = 0,dirty,base = 0;
UCHAR final_channel = 0;
if(pChannelInfo == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("pAd->pChannelInfo equal NULL.\n"));
return (FirstChannel(pAd));
}
/* Calculate Dirtiness */
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
if (pChannelInfo->ApCnt[channel_index] > 0)
{
INT ll;
pChannelInfo->dirtyness[channel_index] += 30;
/*5G */
if (pChannelInfo->IsABand)
{
int Channel = pAd->ChannelList[channel_index].Channel;
/*Make secondary channel dirty */
if(pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
{
if (Channel > 14)
{
if ((Channel == 36) || (Channel == 44) || (Channel == 52) || (Channel== 60)
|| (Channel == 100) || (Channel == 108) || (Channel == 116)
|| (Channel == 124) || (Channel == 132) || (Channel == 149) || (Channel == 157))
{
if (channel_index + 1 < MAX_NUM_OF_CHANNELS)
if(pAd->ChannelList[channel_index+1].Channel - pAd->ChannelList[channel_index].Channel == 4)
pChannelInfo->dirtyness[channel_index+1] += 1;
}
else if ((Channel == 40) || (Channel == 48) || (Channel == 56) ||
(Channel == 64) || (Channel == 104) || (Channel == 112) ||
(Channel == 120) || (Channel == 128) || (Channel == 136) ||
(Channel== 153) || (Channel == 161))
{
if(channel_index - 1 >= 0)
if(pAd->ChannelList[channel_index].Channel - pAd->ChannelList[channel_index-1].Channel == 4)
pChannelInfo->dirtyness[channel_index-1] += 1;
}
}
}
}
/*2.4G */
if (!pChannelInfo->IsABand)
{
int ChanOffset = 0;
if((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)&&
(pAd->CommonCfg.RegTransmitSetting.field.EXTCHA == EXTCHA_BELOW))
{
/*
BW is 40Mhz
the distance between two channel to prevent interference
is 4 channel width plus 4 channel width (secondary channel)
*/
ChanOffset = 8;
}
else
{
/*
BW is 20Mhz
The channel width of 2.4G band is 5Mhz.
The distance between two channel to prevent interference is 4 channel width
*/
ChanOffset = 4;
}
for (ll = channel_index + 1; ll < (channel_index + ChanOffset + 1); ll++)
{
if (ll < MAX_NUM_OF_CHANNELS)
pChannelInfo->dirtyness[ll]++;
}
if((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)&&
(pAd->CommonCfg.RegTransmitSetting.field.EXTCHA == EXTCHA_ABOVE))
{
/* BW is 40Mhz */
ChanOffset = 8;
}
else
{
/* BW is 20Mhz */
ChanOffset = 4;
}
for (ll = channel_index - 1; ll > (channel_index - ChanOffset - 1); ll--)
{
if (ll >= 0)
pChannelInfo->dirtyness[ll]++;
}
}
}
}/* Calculate Dirtiness */
AutoChannelSkipListSetDirty(pAd);
printk("=====================================================\n");
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
/* debug messages */
printk("Channel %d : Dirty = %ld, ApCnt=%ld, Busy Time = %d, Skip Channel = %s\n",
pAd->ChannelList[channel_index].Channel,
pChannelInfo->dirtyness[channel_index],
pChannelInfo->ApCnt[channel_index],
pChannelInfo->chanbusytime[channel_index],
(pChannelInfo->SkipList[channel_index] == TRUE) ? "TRUE" : "FALSE");
printk("=====================================================\n");
pAd->ApCfg.AutoChannel_Channel = 0;
/* RULE 1. pick up a good channel that no one used */
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
if (pChannelInfo->SkipList[channel_index] == TRUE)
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&&(pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, pAd->ChannelList[channel_index].Channel))
continue;
#endif
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_index]) == FALSE)
continue;
#endif /* AP_QLOAD_SUPPORT */
if (pChannelInfo->dirtyness[channel_index] == 0) break;
}
if (channel_index < pAd->ChannelListNum)
{
printk("Rule 1 APCnt : dirtiness == 0 (no one used and no interference) ==> Select Channel %d\n", pAd->ChannelList[channel_index].Channel);
return pAd->ChannelList[channel_index].Channel;
}
/* RULE 2. if not available, then co-use a channel that's no interference (dirtyness=30) */
/* RULE 3. if not available, then co-use a channel that has minimum interference (dirtyness=31,32) */
for (dirty = 30; dirty <= 32; dirty++)
{
BOOLEAN candidate[MAX_NUM_OF_CHANNELS+1], candidate_num=0;
UCHAR min_ApCnt = 255;
final_channel = 0;
NdisZeroMemory(candidate, MAX_NUM_OF_CHANNELS+1);
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
if (pChannelInfo->SkipList[channel_index] == TRUE)
continue;
if (pChannelInfo->dirtyness[channel_index] == dirty)
{
candidate[channel_index]=TRUE;
candidate_num++;
}
}
/* if there's more than 1 candidate, pick up the channel with minimum RSSI */
if (candidate_num)
{
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
/* when busy time of a channel > threshold, skip it */
/* TODO: Use weight for different references to do channel selection */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_index]) == FALSE)
{
/* check next one */
continue;
}
#endif /* AP_QLOAD_SUPPORT */
if (candidate[channel_index] && (pChannelInfo->ApCnt[channel_index] < min_ApCnt))
{
if((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
&& (BW40_ChannelCheck(pAd->ChannelList[channel_index].Channel) == FALSE))
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&&(pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, pAd->ChannelList[channel_index].Channel))
continue;
#endif
final_channel = pAd->ChannelList[channel_index].Channel;
min_ApCnt = pChannelInfo->ApCnt[channel_index];
}
}
if (final_channel != 0)
{
printk("Rule 2 APCnt : minimum APCnt with minimum interference(dirtiness: 30~32) ==> Select Channel %d\n", final_channel);
printk(" Dirtiness = %d , Min ApCnt = %d\n", dirty, min_ApCnt);
return final_channel;
}
}
}
/* RULE 3. still not available, pick up the random channel */
base = RandomByte2(pAd);
for (channel_index=0 ; channel_index < pAd->ChannelListNum ; channel_index++)
{
final_channel = pAd->ChannelList[(base + channel_index) % pAd->ChannelListNum].Channel;
if (AutoChannelSkipListCheck(pAd, final_channel))
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&&(pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, final_channel))
continue;
#endif
break;
}
printk("Rule 3 APCnt : Randomly Select ==> Select Channel %d\n",final_channel);
return final_channel;
}
/*
==========================================================================
Description:
This routine calaulates the dirtyness of all channels by the
CCA value and Rssi. Store dirtyness to pChannelInfo strcut.
This routine is called at iwpriv cmmand or initialization. It chooses and returns
a good channel whith less interference.
Return:
ch - channel number that
NOTE:
==========================================================================
*/
static inline UCHAR SelectClearChannelCCA(
IN PRTMP_ADAPTER pAd
)
{
#define CCA_THRESHOLD (100)
PBSSINFO pBssInfoTab = pAd->pBssInfoTab;
PCHANNELINFO pChannelInfo = pAd->pChannelInfo;
INT ch = 1, channel_idx, BssTab_idx;
BSSENTRY *pBss;
UINT32 min_dirty, min_falsecca;
int candidate_ch;
UCHAR ExChannel[2] = {0};
UCHAR candidate_ExChannel[2] = {0};
UCHAR base;
if(pBssInfoTab == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("pAd->pBssInfoTab equal NULL.\n"));
return (FirstChannel(pAd));
}
if(pChannelInfo == NULL)
{
DBGPRINT(RT_DEBUG_ERROR, ("pAd->pChannelInfo equal NULL.\n"));
return (FirstChannel(pAd));
}
for (BssTab_idx = 0; BssTab_idx < pBssInfoTab->BssNr; BssTab_idx++)
{
pBss = &(pBssInfoTab->BssEntry[BssTab_idx]);
channel_idx = GetChIdx(pAd, pBss->Channel);
if (channel_idx < 0 )
continue;
if (pBss->Rssi >= RSSI_TO_DBM_OFFSET-50)
{
/* high signal >= -50 dbm */
pChannelInfo->dirtyness[channel_idx] += 50;
}
else if (pBss->Rssi <= RSSI_TO_DBM_OFFSET-80)
{
/* low signal <= -80 dbm */
pChannelInfo->dirtyness[channel_idx] += 30;
}
else
{
/* mid signal -50 ~ -80 dbm */
pChannelInfo->dirtyness[channel_idx] += 40;
}
pChannelInfo->dirtyness[channel_idx] += 40;
{
INT BelowBound;
INT AboveBound;
INT loop;
switch(pBss->ExtChOffset)
{
case EXTCHA_ABOVE:
BelowBound = pChannelInfo->IsABand ? 1 : 4;
AboveBound = pChannelInfo->IsABand ? 2 : 8;
break;
case EXTCHA_BELOW:
BelowBound = pChannelInfo->IsABand ? 2 : 8;
AboveBound = pChannelInfo->IsABand ? 1 : 4;
break;
default:
BelowBound = pChannelInfo->IsABand ? 1 : 4;
AboveBound = pChannelInfo->IsABand ? 1 : 4;
break;
}
/* check neighbor channel */
for (loop = (channel_idx+1); loop <= (channel_idx+AboveBound); loop++)
{
if (loop >= MAX_NUM_OF_CHANNELS)
break;
if (pAd->ChannelList[loop].Channel - pAd->ChannelList[loop-1].Channel > 4)
break;
pChannelInfo->dirtyness[loop] +=
((9 - (loop - channel_idx)) * 4);
}
/* check neighbor channel */
for (loop=(channel_idx-1); loop >= (channel_idx-BelowBound); loop--)
{
if (loop < 0)
break;
if (pAd->ChannelList[loop+1].Channel - pAd->ChannelList[loop].Channel > 4)
continue;
pChannelInfo->dirtyness[loop] +=
((9 - (channel_idx - loop)) * 4);
}
}
printk(" ch%d bssid=%02x:%02x:%02x:%02x:%02x:%02x\n",
pBss->Channel, pBss->Bssid[0], pBss->Bssid[1], pBss->Bssid[2], pBss->Bssid[3], pBss->Bssid[4], pBss->Bssid[5]);
}
AutoChannelSkipListSetDirty(pAd);
printk("======================RT309x=========================\n");
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
printk("Channel %d : Dirty = %ld, False CCA = %u, Busy Time = %u, Skip Channel = %s\n",
pAd->ChannelList[channel_idx].Channel,
pChannelInfo->dirtyness[channel_idx],
pChannelInfo->FalseCCA[channel_idx],
pChannelInfo->chanbusytime[channel_idx],
(pChannelInfo->SkipList[channel_idx] == TRUE) ? "TRUE" : "FALSE");
}
printk("=====================================================\n");
min_dirty = min_falsecca = 0xFFFFFFFF;
/*
* Rule 1. Pick up a good channel that False_CCA =< CCA_THRESHOLD
* by dirtyness
*/
candidate_ch = -1;
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
if (pChannelInfo->SkipList[channel_idx] == TRUE)
continue;
if (pChannelInfo->FalseCCA[channel_idx] <= CCA_THRESHOLD)
{
UINT32 dirtyness = pChannelInfo->dirtyness[channel_idx];
ch = pAd->ChannelList[channel_idx].Channel;
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
/* when busy time of a channel > threshold, skip it */
/* TODO: Use weight for different references to do channel selection */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_idx]) == FALSE)
{
/* check next one */
continue;
}
#endif /* AP_QLOAD_SUPPORT */
#ifdef DOT11_N_SUPPORT
/*
User require 40MHz Bandwidth.
In the case, ignor all channel
doesn't support 40MHz Bandwidth.
*/
if ((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
&& (pChannelInfo->IsABand && (GetABandChOffset(ch) == 0)))
continue;
/*
Need to Consider the dirtyness of extending channel
in 40 MHz bandwidth channel.
*/
if (pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
{
if (pAd->pChannelInfo->IsABand)
{
if (((channel_idx + GetABandChOffset(ch)) >=0)
&& ((channel_idx + GetABandChOffset(ch)) < pAd->ChannelListNum))
{
INT ChOffsetIdx = channel_idx + GetABandChOffset(ch);
dirtyness += pChannelInfo->dirtyness[ChOffsetIdx];
}
}
else
{
UCHAR ExChannel_idx = 0;
if (pAd->ChannelList[channel_idx].Channel == 14)
{
dirtyness = 0xFFFFFFFF;
break;
}
else
{
NdisZeroMemory(ExChannel, sizeof(ExChannel));
if (((channel_idx - 4) >=0) && ((channel_idx - 4) < pAd->ChannelListNum))
{
dirtyness += pChannelInfo->dirtyness[channel_idx - 4];
ExChannel[ExChannel_idx++] = pAd->ChannelList[channel_idx - 4].Channel;
}
if (((channel_idx + 4) >=0) && ((channel_idx + 4) < pAd->ChannelListNum))
{
dirtyness += pChannelInfo->dirtyness[channel_idx + 4];
ExChannel[ExChannel_idx++] = pAd->ChannelList[channel_idx + 4].Channel;
}
}
}
}
#endif /* DOT11_N_SUPPORT */
if ((min_dirty > dirtyness))
{
min_dirty = dirtyness;
candidate_ch = channel_idx;
NdisMoveMemory(candidate_ExChannel, ExChannel, 2);
}
}
}
if (candidate_ch >= 0)
{
ch = pAd->ChannelList[candidate_ch].Channel;
printk("Rule 1 CCA value : Min Dirtiness ==> Select Channel %d \n", ch);
printk("Min Dirty = %u\n", min_dirty);
printk("ExChannel = %d , %d\n", candidate_ExChannel[0], candidate_ExChannel[1]);
printk("BW = %s\n", (pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)? "40" : "20");
return ch;
}
/*
* Rule 2. Pick up a good channel that False_CCA > CCA_THRESHOLD
* by FalseCCA (FalseCCA + Dirtyness)
*/
candidate_ch = -1;
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
if (pChannelInfo->SkipList[channel_idx] == TRUE)
continue;
if (pChannelInfo->FalseCCA[channel_idx] > CCA_THRESHOLD)
{
UINT32 falsecca = pChannelInfo->FalseCCA[channel_idx] + pChannelInfo->dirtyness[channel_idx];
ch = pAd->ChannelList[channel_idx].Channel;
#ifdef DOT11_N_SUPPORT
if ((pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)
&& (pChannelInfo->IsABand && (GetABandChOffset(ch) == 0)))
continue;
#endif /* DOT11_N_SUPPORT */
if ((GetABandChOffset(ch) != 0)
&& ((channel_idx + GetABandChOffset(ch)) >=0)
&& ((channel_idx + GetABandChOffset(ch)) < pAd->ChannelListNum))
{
INT ChOffsetIdx = channel_idx + GetABandChOffset(ch);
falsecca += (pChannelInfo->FalseCCA[ChOffsetIdx] +
pChannelInfo->dirtyness[ChOffsetIdx]);
}
#ifdef AP_QLOAD_SUPPORT
/* QLOAD ALARM */
/* when busy time of a channel > threshold, skip it */
/* TODO: Use weight for different references to do channel selection */
if (QBSS_LoadIsBusyTimeAccepted(pAd,
pChannelInfo->chanbusytime[channel_idx]) == FALSE)
{
/* check next one */
continue;
}
#endif /* AP_QLOAD_SUPPORT */
if ((min_falsecca > falsecca))
{
min_falsecca = falsecca;
candidate_ch = channel_idx;
}
}
}
if (candidate_ch >= 0)
{
ch = pAd->ChannelList[candidate_ch].Channel;
printk("Rule 2 CCA value : Min False CCA value ==> Select Channel %d, min falsecca = %d \n", ch, min_falsecca);
return ch;
}
base = RandomByte2(pAd);
for (channel_idx=0 ; channel_idx < pAd->ChannelListNum ; channel_idx++)
{
ch = pAd->ChannelList[(base + channel_idx) % pAd->ChannelListNum].Channel;
if (AutoChannelSkipListCheck(pAd, ch))
continue;
#ifdef A_BAND_SUPPORT
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&& (pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, ch))
continue;
#endif
break;
}
printk("Rule 3 CCA value : Randomly Select ==> Select Channel %d\n", ch);
return ch;
}
INT scan_ch_restore(RTMP_ADAPTER *pAd, UCHAR OpMode)
{
INT bw, ch;
if (pAd->CommonCfg.BBPCurrentBW != pAd->hw_cfg.bbp_bw)
rtmp_bbp_set_bw(pAd, pAd->hw_cfg.bbp_bw);
if (pAd->hw_cfg.bbp_bw == BW_80)
ch = pAd->CommonCfg.vht_cent_ch;
else if (pAd->hw_cfg.bbp_bw == BW_40)
ch = pAd->CommonCfg.CentralChannel;
else
ch = pAd->CommonCfg.Channel;
ASSERT((ch != 0));
AsicSwitchChannel(pAd, ch, FALSE);
AsicLockChannel(pAd, ch);
switch(pAd->CommonCfg.BBPCurrentBW)
{
case BW_80:
bw = 80;
break;
case BW_40:
bw = 40;
break;
case BW_10:
bw = 10;
break;
case BW_20:
default:
bw =20;
break;
}
DBGPRINT(RT_DEBUG_TRACE, ("SYNC - End of SCAN, restore to %dMHz channel %d, Total BSS[%02d]\n",
bw, ch, pAd->ScanTab.BssNr));
#ifdef CONFIG_AP_SUPPORT
if (OpMode == OPMODE_AP)
{
#ifdef APCLI_SUPPORT
#ifdef APCLI_AUTO_CONNECT_SUPPORT
if (pAd->ApCfg.ApCliAutoConnectRunning == TRUE)
{
if (!ApCliAutoConnectExec(pAd))
{
DBGPRINT(RT_DEBUG_ERROR, ("Error in %s\n", __FUNCTION__));
}
}
#endif /* APCLI_AUTO_CONNECT_SUPPORT */
#endif /* APCLI_SUPPORT */
pAd->Mlme.ApSyncMachine.CurrState = AP_SYNC_IDLE;
RTMPResumeMsduTransmission(pAd);
/* keep the latest scan channel, could be 0 for scan complete, or other channel */
pAd->ApCfg.LastScanChannel = pAd->MlmeAux.Channel;
pAd->ApCfg.ScanChannelCnt=0;
/* Suspend scanning and Resume TxData for Fast Scanning */
if ((pAd->MlmeAux.Channel != 0) &&
(pAd->ApCfg.bImprovedScan))
{
pAd->Mlme.ApSyncMachine.CurrState = AP_SCAN_PENDING;
DBGPRINT(RT_DEBUG_TRACE, ("bImprovedScan ~~ Get back to send data\n"));
}
else
pAd->ApCfg.bImprovedScan = FALSE;
#ifdef CON_WPS
if (pAd->conWscStatus != CON_WPS_STATUS_DISABLED)
{
MlmeEnqueue(pAd, AP_SYNC_STATE_MACHINE, APMT2_MLME_SCAN_COMPLETE, 0, NULL,0 );
RTMP_MLME_HANDLER(pAd);
}
#endif /* CON_WPS*/
/* iwpriv set auto channel selection*/
/* scanned all channels*/
if (pAd->ApCfg.bAutoChannelAtBootup==TRUE)
{
pAd->CommonCfg.Channel = SelectBestChannel(pAd, pAd->ApCfg.AutoChannelAlg);
pAd->ApCfg.bAutoChannelAtBootup = FALSE;
#ifdef DOT11_N_SUPPORT
N_ChannelCheck(pAd);
#endif /* DOT11_N_SUPPORT */
APStop(pAd);
APStartUp(pAd);
}
if ((pAd->CommonCfg.Channel > 14) &&
(pAd->CommonCfg.bIEEE80211H == TRUE) &&
RadarChannelCheck(pAd, pAd->CommonCfg.Channel) &&
pAd->Dot11_H.RDMode != RD_SWITCHING_MODE)
{
if (pAd->Dot11_H.InServiceMonitorCount)
{
pAd->Dot11_H.RDMode = RD_NORMAL_MODE;
AsicEnableBssSync(pAd);
}
else
{
pAd->Dot11_H.RDMode = RD_SILENCE_MODE;
}
}
else
{
AsicEnableBssSync(pAd);
}
}
#endif /* CONFIG_AP_SUPPORT */
return TRUE;
}
/*
==========================================================================
Description:
Scan next channel
==========================================================================
*/
VOID ScanNextChannel(
IN PRTMP_ADAPTER pAd,
IN UCHAR OpMode)
{
UCHAR ScanType = pAd->MlmeAux.ScanType;
UINT ScanTimeIn5gChannel = SHORT_CHANNEL_TIME;
BOOLEAN ScanPending = FALSE;
RALINK_TIMER_STRUCT *sc_timer = NULL;
UINT stay_time = 0;
#ifdef RALINK_ATE
/* Nothing to do in ATE mode. */
if (ATE_ON(pAd))
return;
#endif /* RALINK_ATE */
#ifdef CONFIG_AP_SUPPORT
ScanPending = ((pAd->ApCfg.bImprovedScan) && (pAd->ApCfg.ScanChannelCnt>=3));//7
#endif
if ((pAd->MlmeAux.Channel == 0) || ScanPending)
{
scan_ch_restore(pAd, OpMode);
}
else
{
AsicSwitchChannel(pAd, pAd->MlmeAux.Channel, TRUE);
AsicLockChannel(pAd, pAd->MlmeAux.Channel);
{
BOOLEAN bScanPassive = FALSE;
if (pAd->MlmeAux.Channel > 14)
{
if ((pAd->CommonCfg.bIEEE80211H == 1)
&& RadarChannelCheck(pAd, pAd->MlmeAux.Channel))
bScanPassive = TRUE;
}
#ifdef CARRIER_DETECTION_SUPPORT
if (pAd->CommonCfg.CarrierDetect.Enable == TRUE)
bScanPassive = TRUE;
#endif /* CARRIER_DETECTION_SUPPORT */
if (bScanPassive)
{
ScanType = SCAN_PASSIVE;
ScanTimeIn5gChannel = MIN_CHANNEL_TIME;
}
}
/* Check if channel if passive scan under current regulatory domain */
if (CHAN_PropertyCheck(pAd, pAd->MlmeAux.Channel, CHANNEL_PASSIVE_SCAN) == TRUE)
ScanType = SCAN_PASSIVE;
if (OpMode == OPMODE_AP)
sc_timer = &pAd->MlmeAux.APScanTimer;
else
sc_timer = &pAd->MlmeAux.ScanTimer;
/* We need to shorten active scan time in order for WZC connect issue */
/* Chnage the channel scan time for CISCO stuff based on its IAPP announcement */
#ifdef CONFIG_AP_SUPPORT
if (ScanType == FAST_SCAN_ACTIVE) {
RTMPSetTimer(&pAd->MlmeAux.APScanTimer, MIN_CHANNEL_TIME);//Carter test MIN_CHANNEL_TIME instead of Fast_Scan_Time
pAd->ApCfg.ScanChannelCnt++;
}
else /* must be SCAN_PASSIVE or SCAN_ACTIVE*/
#endif
{
#ifdef CONFIG_AP_SUPPORT
pAd->ApCfg.ScanChannelCnt++;
if ((OpMode == OPMODE_AP) && (pAd->ApCfg.bAutoChannelAtBootup))
stay_time = AUTO_CHANNEL_SEL_TIMEOUT;
else
#endif /* CONFIG_AP_SUPPORT */
if (WMODE_CAP_2G(pAd->CommonCfg.PhyMode) &&
WMODE_CAP_5G(pAd->CommonCfg.PhyMode))
{
if (pAd->MlmeAux.Channel > 14)
stay_time = ScanTimeIn5gChannel;
else
stay_time = MIN_CHANNEL_TIME;
}
else
stay_time = MAX_CHANNEL_TIME;
}
RTMPSetTimer(sc_timer, stay_time);
if (SCAN_MODE_ACT(ScanType))
{
if (scan_active(pAd, OpMode, ScanType) == FALSE)
return;
}
/* For SCAN_CISCO_PASSIVE, do nothing and silently wait for beacon or other probe reponse*/
#ifdef CONFIG_AP_SUPPORT
if (OpMode == OPMODE_AP)
pAd->Mlme.ApSyncMachine.CurrState = AP_SCAN_LISTEN;
#endif /* CONFIG_AP_SUPPORT */
}
}
VOID MlmeJoinReqAction(
IN PRTMP_ADAPTER pAd,
IN MLME_QUEUE_ELEM *Elem)
{
UCHAR BBPValue = 0;
BSS_ENTRY *pBss;
BOOLEAN TimerCancelled;
HEADER_802_11 Hdr80211;
NDIS_STATUS NStatus;
ULONG FrameLen = 0;
PUCHAR pOutBuffer = NULL;
PUCHAR pSupRate = NULL;
UCHAR SupRateLen;
PUCHAR pExtRate = NULL;
UCHAR ExtRateLen;
UCHAR ASupRate[] = {0x8C, 0x12, 0x98, 0x24, 0xb0, 0x48, 0x60, 0x6C};
UCHAR ASupRateLen = sizeof(ASupRate)/sizeof(UCHAR);
MLME_JOIN_REQ_STRUCT *pInfo = (MLME_JOIN_REQ_STRUCT *)(Elem->Msg);
DBGPRINT(RT_DEBUG_TRACE, ("SYNC - MlmeJoinReqAction(BSS #%ld)\n", pInfo->BssIdx));
#ifdef RTMP_MAC_PCI
if ((OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_PCIE_DEVICE)) &&
(IDLE_ON(pAd)) &&
(pAd->StaCfg.bRadio == TRUE) &&
(RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_IDLE_RADIO_OFF)))
{
RT28xxPciAsicRadioOn(pAd, GUI_IDLE_POWER_SAVE);
}
#endif
RTMPCancelTimer(&pAd->MlmeAux.ScanTimer, &TimerCancelled);
RTMPCancelTimer(&pAd->MlmeAux.BeaconTimer, &TimerCancelled);
pBss = &pAd->MlmeAux.SsidBssTab.BssEntry[pInfo->BssIdx];
COPY_MAC_ADDR(pAd->MlmeAux.Bssid, pBss->Bssid);
if (pBss->Hidden == 0)
{
RTMPZeroMemory(pAd->MlmeAux.Ssid, MAX_LEN_OF_SSID);
NdisMoveMemory(pAd->MlmeAux.Ssid, pBss->Ssid, pBss->SsidLen);
pAd->MlmeAux.SsidLen = pBss->SsidLen;
}
pAd->MlmeAux.BssType = pBss->BssType;
pAd->MlmeAux.Channel = pBss->Channel;
pAd->MlmeAux.CentralChannel = pBss->CentralChannel;
#ifdef EXT_BUILD_CHANNEL_LIST
if ((pAd->StaCfg.IEEE80211dClientMode != Rt802_11_D_None) &&
(pBss->bHasCountryIE == TRUE))
{
NdisMoveMemory(&pAd->CommonCfg.CountryCode[0], &pBss->CountryString[0], 2);
if (pBss->CountryString[2] == 'I')
pAd->CommonCfg.Geography = IDOR;
else if (pBss->CountryString[2] == 'O')
pAd->CommonCfg.Geography = ODOR;
else
pAd->CommonCfg.Geography = BOTH;
BuildChannelListEx(pAd);
}
#endif
RTMP_BBP_IO_READ8_BY_REG_ID(pAd, BBP_R4, &BBPValue);
BBPValue &= (~0x18);
RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R4, BBPValue);
DBGPRINT(RT_DEBUG_TRACE, ("SYNC - BBP R4 to 20MHz.l\n"));
AsicSwitchChannel(pAd, pAd->MlmeAux.Channel, FALSE);
AsicLockChannel(pAd, pAd->MlmeAux.Channel);
RTMPSetTimer(&pAd->MlmeAux.BeaconTimer, JOIN_TIMEOUT);
do
{
if (((pAd->CommonCfg.bIEEE80211H == 1) &&
(pAd->MlmeAux.Channel > 14) &&
RadarChannelCheck(pAd, pAd->MlmeAux.Channel))
#ifdef CARRIER_DETECTION_SUPPORT
|| (pAd->CommonCfg.CarrierDetect.Enable == TRUE)
#endif
)
{
if (pBss->Hidden == 0)
break;
}
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer);
if (NStatus == NDIS_STATUS_SUCCESS)
{
if (pAd->MlmeAux.Channel <= 14)
{
pSupRate = pAd->CommonCfg.SupRate;
SupRateLen = pAd->CommonCfg.SupRateLen;
pExtRate = pAd->CommonCfg.ExtRate;
ExtRateLen = pAd->CommonCfg.ExtRateLen;
}
else
{
pSupRate = ASupRate;
SupRateLen = ASupRateLen;
ExtRateLen = 0;
}
if (pAd->MlmeAux.BssType == BSS_INFRA)
MgtMacHeaderInit(pAd, &Hdr80211, SUBTYPE_PROBE_REQ, 0, pAd->MlmeAux.Bssid, pAd->MlmeAux.Bssid);
else
MgtMacHeaderInit(pAd, &Hdr80211, SUBTYPE_PROBE_REQ, 0, BROADCAST_ADDR, BROADCAST_ADDR);
MakeOutgoingFrame(pOutBuffer, &FrameLen,
sizeof(HEADER_802_11), &Hdr80211,
1, &SsidIe,
1, &pAd->MlmeAux.SsidLen,
pAd->MlmeAux.SsidLen, pAd->MlmeAux.Ssid,
1, &SupRateIe,
1, &SupRateLen,
SupRateLen, pSupRate,
END_OF_ARGS);
if (ExtRateLen)
{
ULONG Tmp;
MakeOutgoingFrame(pOutBuffer + FrameLen, &Tmp,
1, &ExtRateIe,
1, &ExtRateLen,
ExtRateLen, pExtRate,
END_OF_ARGS);
FrameLen += Tmp;
}
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
MlmeFreeMemory(pAd, pOutBuffer);
}
} while (FALSE);
DBGPRINT(RT_DEBUG_TRACE, ("SYNC - Switch to ch %d, Wait BEACON from %02x:%02x:%02x:%02x:%02x:%02x\n",
pBss->Channel, pBss->Bssid[0], pBss->Bssid[1], pBss->Bssid[2], pBss->Bssid[3], pBss->Bssid[4], pBss->Bssid[5]));
pAd->Mlme.SyncMachine.CurrState = JOIN_WAIT_BEACON;
}
/*
==========================================================================
Description:
Scan next channel
==========================================================================
*/
void ScanNextChannel(struct rt_rtmp_adapter *pAd)
{
struct rt_header_802_11 Hdr80211;
u8 *pOutBuffer = NULL;
int NStatus;
unsigned long FrameLen = 0;
u8 SsidLen = 0, ScanType = pAd->MlmeAux.ScanType, BBPValue = 0;
u16 Status;
struct rt_header_802_11 * pHdr80211;
u32 ScanTimeIn5gChannel = SHORT_CHANNEL_TIME;
{
if (MONITOR_ON(pAd))
return;
}
if (pAd->MlmeAux.Channel == 0) {
if ((pAd->CommonCfg.BBPCurrentBW == BW_40)
&& (INFRA_ON(pAd)
|| (pAd->OpMode == OPMODE_AP))
) {
AsicSwitchChannel(pAd, pAd->CommonCfg.CentralChannel,
FALSE);
AsicLockChannel(pAd, pAd->CommonCfg.CentralChannel);
RTMP_BBP_IO_READ8_BY_REG_ID(pAd, BBP_R4, &BBPValue);
BBPValue &= (~0x18);
BBPValue |= 0x10;
RTMP_BBP_IO_WRITE8_BY_REG_ID(pAd, BBP_R4, BBPValue);
DBGPRINT(RT_DEBUG_TRACE,
("SYNC - End of SCAN, restore to 40MHz channel %d, Total BSS[%02d]\n",
pAd->CommonCfg.CentralChannel,
pAd->ScanTab.BssNr));
} else {
AsicSwitchChannel(pAd, pAd->CommonCfg.Channel, FALSE);
AsicLockChannel(pAd, pAd->CommonCfg.Channel);
DBGPRINT(RT_DEBUG_TRACE,
("SYNC - End of SCAN, restore to channel %d, Total BSS[%02d]\n",
pAd->CommonCfg.Channel, pAd->ScanTab.BssNr));
}
{
/* */
/* To prevent data lost. */
/* Send an NULL data with turned PSM bit on to current associated AP before SCAN progress. */
/* Now, we need to send an NULL data with turned PSM bit off to AP, when scan progress done */
/* */
if (OPSTATUS_TEST_FLAG
(pAd, fOP_STATUS_MEDIA_STATE_CONNECTED)
&& (INFRA_ON(pAd))) {
NStatus =
MlmeAllocateMemory(pAd,
(void *)& pOutBuffer);
if (NStatus == NDIS_STATUS_SUCCESS) {
pHdr80211 = (struct rt_header_802_11 *) pOutBuffer;
MgtMacHeaderInit(pAd, pHdr80211,
SUBTYPE_NULL_FUNC, 1,
pAd->CommonCfg.Bssid,
pAd->CommonCfg.Bssid);
pHdr80211->Duration = 0;
pHdr80211->FC.Type = BTYPE_DATA;
pHdr80211->FC.PwrMgmt =
(pAd->StaCfg.Psm == PWR_SAVE);
/* Send using priority queue */
MiniportMMRequest(pAd, 0, pOutBuffer,
sizeof
(struct rt_header_802_11));
DBGPRINT(RT_DEBUG_TRACE,
("MlmeScanReqAction -- Send PSM Data frame\n"));
MlmeFreeMemory(pAd, pOutBuffer);
RTMPusecDelay(5000);
}
}
pAd->Mlme.SyncMachine.CurrState = SYNC_IDLE;
Status = MLME_SUCCESS;
MlmeEnqueue(pAd, MLME_CNTL_STATE_MACHINE, MT2_SCAN_CONF,
2, &Status);
}
RTMP_CLEAR_FLAG(pAd, fRTMP_ADAPTER_BSS_SCAN_IN_PROGRESS);
}
#ifdef RTMP_MAC_USB
else if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_NIC_NOT_EXIST)
&& (pAd->OpMode == OPMODE_STA)) {
pAd->Mlme.SyncMachine.CurrState = SYNC_IDLE;
MlmeCntlConfirm(pAd, MT2_SCAN_CONF, MLME_FAIL_NO_RESOURCE);
}
#endif /* RTMP_MAC_USB // */
else {
{
/* BBP and RF are not accessible in PS mode, we has to wake them up first */
if (OPSTATUS_TEST_FLAG(pAd, fOP_STATUS_DOZE))
AsicForceWakeup(pAd, TRUE);
/* leave PSM during scanning. otherwise we may lost ProbeRsp & BEACON */
if (pAd->StaCfg.Psm == PWR_SAVE)
RTMP_SET_PSM_BIT(pAd, PWR_ACTIVE);
}
AsicSwitchChannel(pAd, pAd->MlmeAux.Channel, TRUE);
AsicLockChannel(pAd, pAd->MlmeAux.Channel);
{
if (pAd->MlmeAux.Channel > 14) {
if ((pAd->CommonCfg.bIEEE80211H == 1)
&& RadarChannelCheck(pAd,
pAd->MlmeAux.
Channel)) {
ScanType = SCAN_PASSIVE;
ScanTimeIn5gChannel = MIN_CHANNEL_TIME;
}
}
}
/*Global country domain(ch1-11:active scan, ch12-14 passive scan) */
if ((pAd->MlmeAux.Channel <= 14) && (pAd->MlmeAux.Channel >= 12)
&& ((pAd->CommonCfg.CountryRegion & 0x7f) ==
REGION_31_BG_BAND)) {
ScanType = SCAN_PASSIVE;
}
/* We need to shorten active scan time in order for WZC connect issue */
/* Chnage the channel scan time for CISCO stuff based on its IAPP announcement */
if (ScanType == FAST_SCAN_ACTIVE)
RTMPSetTimer(&pAd->MlmeAux.ScanTimer,
FAST_ACTIVE_SCAN_TIME);
else /* must be SCAN_PASSIVE or SCAN_ACTIVE */
{
if ((pAd->CommonCfg.PhyMode == PHY_11ABG_MIXED)
|| (pAd->CommonCfg.PhyMode == PHY_11ABGN_MIXED)
|| (pAd->CommonCfg.PhyMode == PHY_11AGN_MIXED)
) {
if (pAd->MlmeAux.Channel > 14)
RTMPSetTimer(&pAd->MlmeAux.ScanTimer,
ScanTimeIn5gChannel);
else
RTMPSetTimer(&pAd->MlmeAux.ScanTimer,
MIN_CHANNEL_TIME);
} else
RTMPSetTimer(&pAd->MlmeAux.ScanTimer,
MAX_CHANNEL_TIME);
}
if ((ScanType == SCAN_ACTIVE)
|| (ScanType == FAST_SCAN_ACTIVE)
) {
NStatus = MlmeAllocateMemory(pAd, &pOutBuffer); /*Get an unused nonpaged memory */
if (NStatus != NDIS_STATUS_SUCCESS) {
DBGPRINT(RT_DEBUG_TRACE,
("SYNC - ScanNextChannel() allocate memory fail\n"));
{
pAd->Mlme.SyncMachine.CurrState =
SYNC_IDLE;
Status = MLME_FAIL_NO_RESOURCE;
MlmeEnqueue(pAd,
MLME_CNTL_STATE_MACHINE,
MT2_SCAN_CONF, 2, &Status);
}
return;
}
/* There is no need to send broadcast probe request if active scan is in effect. */
if ((ScanType == SCAN_ACTIVE)
|| (ScanType == FAST_SCAN_ACTIVE)
)
SsidLen = pAd->MlmeAux.SsidLen;
else
SsidLen = 0;
MgtMacHeaderInit(pAd, &Hdr80211, SUBTYPE_PROBE_REQ, 0,
BROADCAST_ADDR, BROADCAST_ADDR);
MakeOutgoingFrame(pOutBuffer, &FrameLen,
sizeof(struct rt_header_802_11), &Hdr80211, 1,
&SsidIe, 1, &SsidLen, SsidLen,
pAd->MlmeAux.Ssid, 1, &SupRateIe, 1,
&pAd->CommonCfg.SupRateLen,
pAd->CommonCfg.SupRateLen,
pAd->CommonCfg.SupRate, END_OF_ARGS);
if (pAd->CommonCfg.ExtRateLen) {
unsigned long Tmp;
MakeOutgoingFrame(pOutBuffer + FrameLen, &Tmp,
1, &ExtRateIe,
1, &pAd->CommonCfg.ExtRateLen,
pAd->CommonCfg.ExtRateLen,
pAd->CommonCfg.ExtRate,
END_OF_ARGS);
FrameLen += Tmp;
}
if (pAd->CommonCfg.PhyMode >= PHY_11ABGN_MIXED) {
unsigned long Tmp;
u8 HtLen;
u8 BROADCOM[4] = { 0x0, 0x90, 0x4c, 0x33 };
if (pAd->bBroadComHT == TRUE) {
HtLen =
pAd->MlmeAux.HtCapabilityLen + 4;
MakeOutgoingFrame(pOutBuffer + FrameLen,
&Tmp, 1, &WpaIe, 1,
&HtLen, 4,
&BROADCOM[0],
pAd->MlmeAux.
HtCapabilityLen,
&pAd->MlmeAux.
HtCapability,
END_OF_ARGS);
} else {
HtLen = pAd->MlmeAux.HtCapabilityLen;
MakeOutgoingFrame(pOutBuffer + FrameLen,
&Tmp, 1, &HtCapIe, 1,
&HtLen, HtLen,
&pAd->CommonCfg.
HtCapability,
END_OF_ARGS);
}
FrameLen += Tmp;
}
MiniportMMRequest(pAd, 0, pOutBuffer, FrameLen);
MlmeFreeMemory(pAd, pOutBuffer);
}
/* For SCAN_CISCO_PASSIVE, do nothing and silently wait for beacon or other probe reponse */
pAd->Mlme.SyncMachine.CurrState = SCAN_LISTEN;
}
}
static inline UCHAR SelectClearChannelBusyTime(
IN PRTMP_ADAPTER pAd
)
{
PCHANNELINFO pChannelInfo = pAd->pChannelInfo;
INT ch = 1, channel_idx;
UINT32 min_busytime;
int candidate_ch;
UCHAR base;
if(pChannelInfo == NULL)
{
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_ERROR, ("pAd->pChannelInfo equal NULL.\n"));
return (FirstChannel(pAd));
}
AutoChannelSkipListSetDirty(pAd);
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("=====================================================\n"));
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Channel %d : Busy Time = %u, Skip Channel = %s\n",
pAd->ChannelList[channel_idx].Channel,
pChannelInfo->chanbusytime[channel_idx],
(pChannelInfo->SkipList[channel_idx] == TRUE) ? "TRUE" : "FALSE"));
}
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("=====================================================\n"));
min_busytime = 0xFFFFFFFF;
candidate_ch = -1;
for (channel_idx = 0; channel_idx < pAd->ChannelListNum; channel_idx++)
{
if (pChannelInfo->SkipList[channel_idx] == TRUE)
continue;
if (pChannelInfo->chanbusytime[channel_idx] < min_busytime)
{
min_busytime = pChannelInfo->chanbusytime[channel_idx];
candidate_ch = channel_idx;
}
}
if (candidate_ch >= 0)
{
ch = pAd->ChannelList[candidate_ch].Channel;
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Rule 3 Channel Busy time value : Min Channel Busy ==> Select Channel %d \n", ch));
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Min Channel Busy = %u\n", min_busytime));
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("BW = %s\n", (pAd->CommonCfg.RegTransmitSetting.field.BW == BW_40)? "40" : "20"));
return ch;
}
base = RandomByte2(pAd);
for (channel_idx=0 ; channel_idx < pAd->ChannelListNum ; channel_idx++)
{
ch = pAd->ChannelList[(base + channel_idx) % pAd->ChannelListNum].Channel;
if (AutoChannelSkipListCheck(pAd, ch))
continue;
if ((pAd->ApCfg.bAvoidDfsChannel == TRUE)
&& (pChannelInfo->IsABand == TRUE)
&& RadarChannelCheck(pAd, ch))
continue;
break;
}
MTWF_LOG(DBG_CAT_ALL, DBG_SUBCAT_ALL, DBG_LVL_TRACE, ("Randomly Select ==> Select Channel %d\n", ch));
return ch;
}
