内容分析发布android wi fi introduction v

B802.11WirelessNetworksAndroidWi-FiWi-FiWi-FiSDIO TIAL

WirelessCoverareaaboutIEEE802.11--WLANMACandPHYlayerIEEE802.11isdesignedtolooklikeanyIEEE802wiredLANIEEE802.11originalin TIAL

802.2LogicalLink802.2LogicalLink TIAL

802MIMOOFDMMIMOOFDM DistributionAccessWireless TIAL

ProbeRequestProbeResponsePassive Active TIAL

TIAL

TIAL

Class1ControlRequesttosendCleartosendManagement TIAL

Class2ManagementReassociationrequest/response(class2->Disassociation(class3->classClassAlldataManagementControl TIAL

“It’s “It’sme,letme 2.“Firstyoumustanswer“my TIAL

Association“Hereisyourassociation3 TIAL

CCCM(AES+CBC-MAC)EAP-TLSEAP-TTLSEAP-PEAPEAP-SIMRobustEIAEAPoRADIUSSEAPoRADIUSServerEAP-MD5P-OTPEAP-GTTKI(RC4+MIC)EAP-TLSWWE(RC4+CRC)EIWeak

E:EncryptionI:IntegrityA:AuthenticationK:KeyManagemen8021 802.1X 802.11i

History TIAL

OpenWEP TIAL

Inarobustsecuritynetworkassociation(RSNA),802.11iprovidesfunctionstoprotectdataframes.EnhancedKeyGroupKeyData TIAL

802.11WirelessNetworksAndroidWi-FiWi-FiWi-FiSDIO TIAL

Wi-FiDirect

Wi-FiDirect

WPS/WAPI

Manag

LegacyWi-Fi/WPS

WAPI ion

WAPIStandalone

WAPILinux

Wi-FiDectNet

Host

LegacyWi-FiNetDeviceMT6620MT6620 TIAL

ControlC

LinuxNetworkWi-FiChipHostDriver TIAL

SourceMT6620Wi-Fidrivercode,builda.koMT6628Wi-Fidrivercode,builda.komt_wfi/wlanorWi-Fisocchipdrivercode,suchasMT6627+MT6682,builda.kofile.alps/load/unloadWi-Fidriver.ko_suppmt6620Wi-Fimt6628Wi-FiWi-Fisocchipfirmware(WIFI_RAM_CODE_MT6582),suchasMT6625+MT6592 TIAL

MT6620Wi-Fidrivercode,compileintobootMT6628Wi-Fidrivercode,compileintobootWi-Fisocchipdrivercode,suchasMT6627+MT6682,compileintobootimage.mt6620Wi-Fimt6628Wi-FiWi-Fisocchipfirmware(WIFI_RAM_CODE_MT6582),suchasMT6625+MT6592 TIAL

Sourcealps/kernel-MT6620Wi-Fidrivercode,compileintobootMT6628Wi-Fidrivercode,compileintobootmt_wifWi-Fisocchipdrivercode,suchasMT6627+MT6682,compileintobootimage._supplcan_8_libmmt6620Wi-Fimt6628Wi-FiWi-Fisocchipfirmware(WIFI_RAM_CODE_SOC),suchas TIAL

LegacyWi-Fiwith802.11n 2-PSKHotspotWi-FiDirectWi-Fi yCertificationProgram–WFAWi-FiDirect/ TIAL

5G802.11a5G802.11acsupport(onlyCertificationProgram–WFA–WFA802.11ac(only TIAL

TIAL

ShareyourAndroiddevice'sdataconnectionviaWi- TIAL

TIAL

YoucanshareAndroiddevice'sfileviaWi-Ficonnection,notneed TIAL

Wi-FiAllianceprovideasimple,standardizedapproachtosetupdevicewithoutsecurityknowledgeUse802.1xandEAPtotransportRegistrationProtocolmessage.STAcangetAPssecuritysetting.Thereare4methodtoconfigurePIN:Input alIdentificationNumberbetweenSTAandAP(orRegistrar)PBC:Justpusha(virtual)buttonbetweenSTAandAP(orNFC:SimplybringtheSTAclosetotheAP(orUSB:usesaUSBsticktotransferdatabetweentheSTAandtheAP(orRegistrar) TIAL

Enter TIAL

Push TIAL

yWi-Fi Phone/Tablet/NB/PC/DTV/DTV/WFDDongle Phone/Tablet/NB/PC/ yAndroidstartstosupportWi-Fi yfromAndroidAllprojectfromJB2.MPcansupportWi-FiDis ysinceit'sanativefeatureofAndroid4.2. “Wireless TIAL

yMTKWFD

TVPhone TIAL

y720x480p60/59.94shallbesupportediftheWFDdevicesupportshigherresolutionat60Hzfamilythan640x480720x576p50shallbesupportediftheWFDdevicesupportshigherresolutionat50Hzfamilythan640x480SupportedCEAVESAHandheldDevices2ChannelLPCM(16bitspersample,2ChannelLPCM(16bitspersample,48KHz)AAC(AdvancedAudioAC3(DolbyAdvancedCodecH.264CBPatlevel3.1 TIAL

Wi-Fi yEnsureinteroperabilityamongWFDPubliclaunchedinWFDDevicesthatdesireMiracastcertificationshallpassthefollowingWi-FiCertificationsortheirequivalentapprovedASDTestWi-Fi11nWi-FiProtectedSetupWi-FiDirectAuthorizedtestlabfor TIAL

802.11WirelessNetworksAndroidWi-FiWi-FiWi-FiSDIO TIAL

LogandNetLog(TcpdumpLog). LogandNetLog(TcpdumpLog)，还需提供AEEDBandUARTKernelLog.供SnifferLog. log和netlog还要提供sniffer TIAL

1.DownloadEngBuild的软件2.开机，开 Log,NetLog(TcpdumpLogTotalLogSize设置为1000;//Log存于T卡,TotalLogSize设大些，以钩选 LogServiceonAndroid3.关机,开机4.开Wi-Fi, 试，复现问题5.复现问题后，上 LogandNetLog到 MT6573AndroidLoggingToolforcustomer.pptx TIAL

Log,NetLog(TcpdumpLog),AEEDBandUARTKernel1.DownloadEngBuild的软件2.开机，开 Log,NetLog(TcpdumpLogTotalLogSize设置为1000;//Log存于T卡,TotalLogSize设大钩选 LogServiceonAndroid3.关机,连 UART串口线(用来获取UARTKernelLog),开机4.开Wi-Fi, 试，复现问 Log,NetLog(TcpdumpLog),AEEDBandUARTKernelLog到eService. 中/system/lib/modules (第6点适用于ICS/JB版本，KK版本不需要) 录或DCC上的文档MT6573AndroidLoggingToolforcustomer.pptxOFgLBtI.l

.复现问题时整个测试过程的SnifferLog TIAL

为PushDebug文件到 AndroidSDK，具体安装方法请参考。PushDebug1.DownloadEngBuild 到AndroidSDK TIAL

mand窗口中执行如下命令(图例请参考附录中的PushDebugFiles页面 到AndroidSDK cdE:\Android_Debug\android-sdk-windows\toolsb)adbc)adbpushwlan.kod)adbpushp2p.koe)adbpushWIFI_RAM_CODEf)adb7.adbreboot执行后 会重启 重启后拔掉USB线再按前面介绍的Log获取步骤获取Log(从log获取步骤的第2*c)、d)、e)中的Command根据需要执行，如只需pushwifidriverwlan.ko文件，只需执行c)，不需要执行d)、e). TIAL

KK版本Wi-Fidriver已经build-inbootimage，Debug时可以pushWi-Fi TIAL

802.11WirelessNetworksAndroidWi-FiWi-FiWi-FiSDIO TIAL

MT6620/MT6628/MT6630Wi-FiusedSDIOinterface,soonlyMT6620/MT6628/MT6630maybesufferedSDIOSDIOIssueCRCCmdTime TIAL

Pleasesearchthekeyword“msdc”inkernelCRCerror(youcanfindouttheterms“-5”or[247.300728]msdc2->XXXCMD<53>Arg<0x >MSDC_INT_DATCRCERR,SDC_DCRC_STS<0x4><-msdc_irq():[247.302060]msdc2->msdcpiofindabort<-msdc_pio_abort():L<1385>[247.303108]msdc2->readpiodata->error<-5>left<4>size<0><-msdc_pio_read():L<1442>PID<tx_thread><0x2c9>[247.304379][wlan]sdio_readl()reportserror:fffffffb[115.998276]msdc2->================<-msdc_set_mclk():L<727>[115.999205]msdc2->!!!Set<50000KHz>Source<197000KHz>->sclk<49250KHz>DDR<0>mode<0>div<1>msdc_set_mclk():L<729>[116.000771]msdc2->================<-msdc_set_mclk():L<730>[116.001719]msdc2->XXXCMD<52>MSDC_INT_RSPCRCERRArg<0x00000e00><-msdc_irq():[116.015220]msdc2->savelathdata<0>cmd0><-msdc_ops_set_ios():L<2874>PID<kmmcd><0xe>[116.016287]msdc2->setmclkto0<-msdc_set_mclk():L<679>PID<kmmcd><0xe>[116.017190]mmc2:error-5whilstinitialisingSDIO(*)Theerrormessageshouldbeafter TIAL

Pleasesearchthekeyword“msdc”inkernelCmdTimeOut(youcanfindouttheterms“-110”

[116.115867]msdc2->================<-msdc_setmclk():L<727>[116.116796]msdc2->!!!Set<50000KHz>Source<197000KHz>->sclk<49250KHz>DDR<0>mode<0>div<1>msdc_set_mclk():L<729>[116.118363]msdc2->================ sdc_set_mclk():L<730>[116.212832]msdc2->XXXCMD<53>Arg<0x >MSDC_INT_DATTMO<-msdc_irq():L<3054>[116.213838]msdc2->XXXCMD<53>MSDC_INT_CMDTMOArg<0x ><-msdc_irq():L<3106>[116.214855][wlan]sdio_readl()reportserror:[116.215472][wlan]HAL_MCR_RDaccessfail!0x4:<3>[37643.419420]0)[2889:ksdioirqd/mmc2]msdc3->msdc3msdc_dump_trans_error<-msdc_dump_trans_error():L<5188><3>[37643.419439]0)[2889ksdioirqd/mmc2]msdc3->XXXCMD<53><0x >Error<-110>Resp<0x0><-msdc_dump_trans_error():L<5191>PID<ksdoirqd/mmc2><0xb49>(*)Theerrormessageshouldbeafter TIAL

Theparametersaredividedtothreecategories(whichareedge,drvandflag)Pleasereferto“Fine-tuneRules(2/3)GB2”forGB2project.

======== .enable_sdio_eirq =mtk(**)msdcX_hw:Xisaccordingtothevalue TIAL

Accordingtoourexperience,mostofCRCerrorcanbefixedbythefollowing4cases.IftheCRCproblemcan’tberesolvedafterapplyingthesettings,pleasecontactus.(A)cmd_edgeisfalling,data_edgeisfalling,andallthedivingcurentare

=====(B)cmd_edgeisfalling,data_edgeisfalling,andallthedrivingcurrentare

=====(C)cmd_edgeisrising,data_edgeisrising,adallthedrivingcurrentare

== ===(D)cmd_edgeisrising,daa_edgeisrising,andallthedrivingcurrentare

==MSDC_SMPL_R===(*)Pleaseremoveandinsertthebattery(notIPOreboot)whenyouapplythenext TIAL

Accordingtoourexperience,mostofCRCerrorcanbefixedbythefollowing16items.IftheCRCproblemcan’tberesolvedafterapplyingthesettings,pleasecontactus.Thesettingsofitem0areas

===== =MSDC_EXT_SDIO_IRQ|MSDC_HIGHSPEED|MSDC_TABDRV|DrivingSample0MSDC_TABDRV|01021314252637MSDC_TABDRV|38090112233diiDrivingSample0MSDC_TABDRV|01021314252637MSDC_TABDRV|38090112233CRC/TIMECRC/TIMEOUTInKernelStartStartETTTooltoFine-ApplyETTRealRealEnvironmentCallusfor

With

GoodNoGood TIAL

802.11WirelessNetworksAndroidWi-FiWi-FiWi-FiSDIO TIAL

#*#*”toenterEngineer TIAL

Copyright©MediaTekInc.Allrights Loglog NetloggsfromSD-AEEDBgsfromSD-AEEDBdata/aee_exp(sdcardisThereare3waysforyoutopulllotoPC.Thethirdismended.1.MounttoPC(UMS)andrun2.Throughadbpull

Beforethis，pleasestop3.ThroughfileexplorerinDDMS/GAT（mended）Note:Pleaseregularcleaningtheoldlogs TIAL

Therearetwo1.FileExplorer（DDMS/GATcould TIAL

Therearetwo TIAL

1.Connectthedevice’sUART4toPCwith3.setcorrectportandBaudrateasAnynameis TIAL

Aftertheoperationis,youcansaveAftertheoperationis,youcansavethelog441123Chosethepathandnameyouwanttosave23Note:aftertheoperationinsecondpictureisdone,youcanstartgetlog TIAL