【WinCE】SD card技术了解并WINCE下SDHC驱动开发（updated）
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SD Card Driver on ADS Summary
了解SD card. 1
WinCE 5.0下SD Stack. 6
Bus Driver 7
Host Controller Driver 8
Client Driver 10
SD on MX31 ADS. 14
Secure Digital Host Controller 14
LP1070 Secure Digital I/O Wi-Fi Driver 17
SD on EVT. 19
附錄... 19
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Author：Titan.Song
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Suumary:
?????? 簡單介紹了一下SD卡的歷史和發(fā)展，同時結合MX31 ADS上的WINCE 下SDHC驅動更深入的了解該硬件的一些行為特點。
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了解SD card
SD是Secure Digital Card卡的簡稱，直譯成漢語就是“安全數(shù)字卡”，是由日本松下公司、東芝公司和美國SANDISK公司共同開發(fā)研制的全新的存儲卡產品。SD存儲卡是一個完全開放的標準（系統(tǒng)），多用于MP3、數(shù)碼攝像機、數(shù)碼相機、電子圖書、AV器材等等，尤其是被廣泛應用在超薄數(shù)碼相機上。SD卡在外形上同Multimedia Card卡保持一致，大小尺寸比MMC卡略厚，容量也大很多。并且兼容MMC卡接口規(guī)范。不由讓人們懷疑SD卡是MMC升級版。另外，SD卡為9引腳，目的是通過把傳輸方式由串行變成并行，以提高傳輸速度。它的讀寫速度比MMC卡要快一些，同時，安全性也更高。SD卡最大的特點就是通過加密功能，可以保證數(shù)據(jù)資料的安全保密。它還具備版權保護技術，所采用的版權保護技術是DVD中使用的CPRM技術（可刻錄介質內容保護）。
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規(guī)格
主要特點：
1.精巧而且超薄
SD記憶卡的尺寸只有24毫米x 32毫米 x 2.1毫米。作為“橋梁媒體”的重要特征，它精致小巧，方便您在不同設備上使用。兼容SD記憶卡的設備可以采用解碼器軟件來播放音樂、影像短片以及更多其他類型的內容，無需像CD播放機或DVD播放機那樣采用驅動裝置。從而使設備的外形更加精巧，同時也賦予了產品設計者發(fā)揮自由創(chuàng)意的全新空間。由于消除了播放音樂時的跳音現(xiàn)象，提高了播放的穩(wěn)定性。
2.大容量栽體
目前，SD記憶卡已經具備各種容量可供選擇，同時，2GB、4GB和8GB的SDHC也出現(xiàn)了。
3.高速數(shù)據(jù)傳輸
為了提供快速響應和容易處理數(shù)字內容，SD記憶卡可以用每秒10MB的速率寫入和讀取數(shù)據(jù)。當其能夠用于遠程通信終端，直接下載內容時，記憶卡的高速傳送能力將可使存取時間和通信成本降至最低，同時可減輕網(wǎng)絡壓力。
4.擁有版權保護功能
先進的數(shù)碼技術使高保真音樂和其他高質量內容的錄制成為現(xiàn)實。日新月異的數(shù)碼技術，借助因特網(wǎng)，實現(xiàn)了全球范圍的信息快速共享。這一進步也帶來了對原版內容的大量復制，因此，作為21世紀的一種切實可行的記憶載體就必須具備高水平的版權保護技術，這樣才能保護大量高質的數(shù)碼數(shù)據(jù)。SD記憶卡可以自由復制各種數(shù)碼數(shù)據(jù)，并采用獨特的內置CPRM技術保存和轉移版權所有的內容，這也是建立一個全新的音樂及其他商業(yè)媒體的發(fā)布體系的關鍵所在。
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硬件結構
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（參看附錄中SD卡和其他卡的一個對比表）
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SDIO卡
SDIO（輸入/輸出）卡是一種擴展帶SD卡插孔設備之功能的接口。正在開發(fā)各種SDIO卡，如相機、Bluetooth 、GPS和802.11b等。
如果編寫以上設備的驅動，當然前提是有一個合格的SD Host Controller。如同編寫USB STORAGE/HID設備的驅動一樣，需要USB HCD支持。MX31的ADS支持基于SDIO的LP1070 SDIO WLAN Card（在Wince 5.0的SD卡驅動模型里，這種驅動稱為client driver）。
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SD_SDIO_SPEC.PDF
SDIO features
l???????? Targeted for portable and stationary applications
l???????? Minimal or no modification to SD Physical bus is required
l???????? Minimal change to memory driver software
l???????? Extended physical form factor available for specialized applications
l???????? Plug and play (PnP) support
l???????? Multi-function support including multiple I/O and combined I/O and memory
l???????? Up to 7 I/O functions plus one memory supported on one card.
l???????? Allows card to interrupt host
l???????? Initialization Voltage: 2.0 to 3.6V
l???????? Operational Voltage range: 3.1 to 3.5V
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WinCE 5.0下SD Stack
?????? 一共可以分為3個部分：a bus driver, host controller driver 和 client drivers，現(xiàn)分別介紹：
1 Bus Driver
?????? 顧名思義，總線，連接client driver和host controller driver之間的一個管理層。這部分代碼微軟已經寫好了，也就是說定義好了client和host之間的通訊接口。（是不是可以這么說:編寫SD WIFI的程序員可以不用知道是什么SDHC，從而達到驅動的跨硬件性）
參考代碼：
D:\WINCE500\PUBLIC\COMMON\OAK\DRIVERS\SDCARD\SDBUSDRIVER\
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2 Host Controller
?????? 控制硬件并且通過上述的BUS driver來和client進行通訊。
參考代碼：
D:\WINCE500\PLATFORM\Mx31\Src\Drivers\Sdhc
D:\WINCE500\PUBLIC\COMMON\OAK\CSP\ARM\FREESCALE\Mxarm11\Drivers\Sdhc
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3 Client Driver
?????? 通過BUS driver和SD設備進行通訊。
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Windows CE 5.0中的SDIO支持如下：
l???????? 動態(tài)插入和拔出
l???????? DMA方式 (平臺相關)
l???????? SDIO 中斷
l???????? 動態(tài)的時鐘控制
l???????? 錯誤恢復
l???????? 喚醒
l???????? v1.0 多功能和組合設備
l???????? CE Power Manager來處理電源管理
l???????? MMC
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下圖可以清晰的表達基于WINCE5.0的一個SD STACK模型：
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| 安全性 SDA 中的SD Memory specification 有種機制可以在特定機器上鎖定卡里面的內容。WINCE 5里并沒有顯示的支持該機制。但是可以自己來做，比如一個文件系統(tǒng)的FILTER等。 |
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Bus Driver
主要功能如下：
l???????? 枚舉板上的卡，并決定他們的類型（MMC, SD Memory or SDIO）
l???????? 配置合適的電流給卡。
l???????? 根據(jù)注冊表的值加載clients
l???????? 把總線要求入隊列
l???????? 把來自host controller的異步通知入隊列
l???????? 總線要求完成，SDIO 中斷，設備插入\拔出
l???????? 出錯時重試
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參考代碼：
D:\WINCE500\PUBLIC\COMMON\OAK\DRIVERS\SDCARD\SDBUSDRIVER
| 貌似此部分代碼非微軟原創(chuàng)： // Copyright (c) 2002 BSQUARE Corporation.? All rights reserved. // DO NOT REMOVE --- BEGIN EXTERNALLY DEVELOPED SOURCE CODE ID 40973--- DO NOT REMOVE |
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Host Controller Driver
主要功能：
l???????? HCD通知總線驅動卡的插入和拔出
l???????? 給卡上電，SD定義了可接受的初時電壓范圍。
l???????? 在總線驅動何客戶端設置完時鐘速度后，打開客戶端卡的時鐘（80個周期）
l???????? 初始，把總線寬度設置成1。如果有需要的話（4-bit mode），把總線寬度設成4bit
l???????? 傳輸SD 命令和數(shù)據(jù)到/來自卡上。
l???????? 負責給槽上電，關電。
l???????? IST 在這里存在
l???????? （可選的）喚醒支持（插入，拔出，SDIO中斷）
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初始化
1.???????? 調用HCD’s XXX_Init
2.???????? 調用 SDHCDAllocateContext() 來分配一段HC的上下文
a)???????? Context 是總線驅動和HCD共享的
3.???????? HCD 使用SDHCDSetXxx宏來填充這個上下文結構
a)???????? 這個步驟是把HC向總線驅動描述一下
b)??????? 包括函數(shù)指針，支持的電流，最大時鐘，槽數(shù)目，SDIO的支持等等。
4.???????? 調用 SDHCDRegisterHostController() 來把自己向總線驅動注冊一下
5.???????? 當總線驅動準備處理SD事件時，它會調用 HCD的init 函數(shù)(pContext->pInitHandler) （見SDHCDRegisterHostController__X函數(shù)）
6.???????? 在初始化里，HCD還應該完成硬件和資源的初始化（IST等）
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下面代碼抄自MX31 BSP中SDHC驅動的SDH_Init函數(shù)中：
| DWORD SDH_Init(DWORD dwContext) { // allocate the context ?status = SDHCDAllocateContext(SDH_SLOTS,? &pHostContext); 。。。。。。 ??? //Set a unique name for each host controller ??? if (pController->ControllerIndex == 1) ??? { ??????? SDHCDSetHCName(pHostContext, TEXT("MXARM11_1")); ??? } ??? else ??? { ??????? SDHCDSetHCName(pHostContext, TEXT("MXARM11_2")); ??? } // set init handler ??? SDHCDSetControllerInitHandler(pHostContext,SDInitialize);? ??? // set deinit handler??? ??? SDHCDSetControllerDeinitHandler(pHostContext, SDDeinitialize); ??? // set the bus request handler ??? SDHCDSetBusRequestHandler(pHostContext,SDHBusRequestHandler);?? ??? // set the cancel I/O handler ??? SDHCDSetCancelIOHandler(pHostContext, SDHCancelIoHandler);?? ??? // set the slot option handler ??? SDHCDSetSlotOptionHandler(pHostContext, SDHSlotOptionHandler); ??? // now register the host controller ??? status = SDHCDRegisterHostController(pHostContext); |
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Slot Option Handler
l???????? 總線驅動調用HCD的 SlotOptionHandler ：
n???????? SDHCDSetSlotPower –設置電壓
n???????? SDHCDSetSlotInterface – 設置時鐘和總線寬度
n???????? SDHCDEnableSDIOInterrupts
n???????? SDHCDAckSDIOInterrupt
n???????? SDHCDDisableSDIOInterrupts
l???????? SDHCDGetWriteProtectStatus – HCD 必須查看SD存儲卡是否開啟寫保護
l???????? SDHCDQueryBlockCapability – 返回HCD的最大和最小塊長度
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總線要求
l???????? 總線驅動把總線要求放入隊列然后把它們傳入HCD的 BusRequestHandler 函數(shù)
l???????? HCD根據(jù)要求來做相應的動作—command/read/write, multi-block, 等.
l???????? HCD 使用某種方式（DMA, PIO, busy-waiting等）來發(fā)送命令和數(shù)據(jù)
l???????? HCD 調用SDHCDIndicateBusRequestComplete() 來通知總線驅動完成
l???????? 總線驅動把完成事件入隊列并提交下一個要求給HCD
l???????? 總線驅動的調度線程將會通知產生要求的起始源事件完成了。
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標準的WINCE SDHC驅動支持
l???????? Standard Host Controller v1.0
n???????? Tokyo Electron Devices – Ellen
n???????? Toshiba - Pegasus
n???????? TI PCI 7x21
n???????? Ricoh R5C811 and R5C841
l???????? Non-standard hosts
n???????? Intel PXA-27x SOC (Mainstone II)
n???????? Samsung SMDK-2410
n???????? Freescale MX series
| 關于Standard Host Controller SDA Host Working Group (MSFT executive member) Defined Standard Host Register Specification to standardize the hardware interface from bus to controller Currently ratified to v1.0 by SDA executive committee MSFT strongly advocating this standard to all IHVs, ODMs, OEMs and Silicons |
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中斷
l???????? HCD包括IST
l???????? IST 決定哪個槽中斷
l???????? IST evaluates interrupt
比如現(xiàn)在拔出SD卡
IST 會調用Bus Driver’s SDHCIndicateSlotStateChange() with DeviceEjected parameter
l???????? Bus Driver calls client’s SlotEventCallBack routine with SDCardEjected.? (Provides async notification about changes in the slot state.)
l???????? Client performs its deinitialization
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| 如何讓鏡像支持SD STACK SYSGEN_SDBUS – SD bus driver (sdbus.dll) SYSGEN_SDHC_STANDARD – Standard host controller (sdhc.dll) SYSGEN_SD_MEMORY – SD Memory client (sdmemory.dll) SYSGEN_BTH or SYSGEN_BTH_SDIO_ONLY – SDIO Bluetooth client (bthsdio.dll) BSP variables will be added for CSP-specific host controllers |
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Client Driver
目前，WINCE5.0所支持的client driver如下：
l???????? SD Memory Class
l???????? SDIO Bluetooth Class - Type A
l???????? SDIO WiFi (vendor specific)
如果需要自己寫client驅動的話可以參考D:\WINCE500\PUBLIC\COMMON\OAK\DRIVERS\SDCARD\SDCLIENTDRIVERS目錄下的微軟自帶的SD client驅動來寫。
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【example1: SD MEMORY DRIVER UNDER WINCE 5.0】
Wince自帶的SD存儲卡client驅動，代碼路徑為：
D:\WINCE500\PUBLIC\COMMON\OAK\DRIVERS\SDCARD\SDCLIENTDRIVERS\SDMEMORY
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一個SD存儲卡在WINCE里的驅動架構如下圖所示：
[圖無法插入]
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1注冊表和啟動
在注冊表里告訴Storage Manager
| [HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\SDMemory] ??? "Name"="SD Memory Card" ??? "Folder"="Storage Card" ??? ;"PartitionDriver"=""????????? ; removable storage cannot have partitions ? [HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\MMC] ??? "Name"="MMC Card" ??? "Folder"="Storage Card" ??? ;"PartitionDriver"=""????????? ; removable storage cannot have partitions ? ; SD Memory Storage class driver [HKEY_LOCAL_MACHINE\Drivers\SDCARD\ClientDrivers\Class\SDMemory_Class] ?? "Dll"="SDMemory.dll" ?? "Prefix"="DSK" ?? "BlockTransferSize"=dword:40? ; send no more than 64 blocks of data per bus transfer ?? ;"SingleBlockWrites"=dword:1? ; alternatively force the driver to use single block access ?? ;"IdleTimeout"=dword:7D0????? ; 2000 milliseconds ?? ;"IdlePowerState"=dword:2???? ; 0 == D0, 1 == D1, etc. ?? ;"DisablePowerManagement"=""? ; if value present, then disable (remove value to enable) ? ?? "Profile"="SDMemory" ?? "IClass"=multi_sz:"{A4E7EDDA-E575-4252-9D6B-4195D48BB865}", ???????????????????? "{A32942B7-920C-486b-B0E6-92A702A99B35}" ? ; MMC Storage Class Driver [HKEY_LOCAL_MACHINE\Drivers\SDCARD\ClientDrivers\Class\MMC_Class] ?? "Dll"="SDMemory.dll" ?? "Prefix"="DSK" ?? "BlockTransferSize"=dword:40? ; send no more than 64 blocks of data per bus transfer ?? ;"SingleBlockWrites"=dword:1? ; alternatively force the driver to use single block access ?? ;"IdleTimeout"=dword:7D0????? ; milliseconds ?? ;"IdlePowerState"=dword:2???? ; 0 == D0, 1 == D1, etc. ? ?;"DisablePowerManagement"=""? ; if value present, then disable (remove value to enable) ? ?? "Profile"="MMC" ?? "IClass"=multi_sz:"{A4E7EDDA-E575-4252-9D6B-4195D48BB865}", ???????????????????? "{A32942B7-920C-486b-B0E6-92A702A99B35}" |
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2 SD命令和總線要求
將所有磁盤的操作轉換成SD的命令和總線要求
| NAME SDMEMORY.DLL ? EXPORTS DSK_Close=SMC_Close DSK_Deinit=SMC_Deinit DSK_Init=SMC_Init DSK_IOControl=SMC_IOControl DSK_Open=SMC_Open DSK_PowerDown=SMC_PowerDown DSK_PowerUp=SMC_PowerUp DSK_Read=SMC_Read DSK_Seek=SMC_Seek DSK_Write=SMC_Write |
下面為具體的DISK I/O操作函數(shù)和CARD I/O操作函數(shù)，詳細實現(xiàn)見sdmemdiskio.cpp和sdmemcardio.cpp：
| // // SDDiskIO // //? SDMemCardConfig??? - Initialise the memcard structure and card itself DWORD SDMemCardConfig( PSD_MEMCARD_INFO pMemCard ); ? ??? //? SDMemRead??????? ??- Read data from card into pSG scatter gather buffers DWORD SDMemRead( PSD_MEMCARD_INFO pMemCard, PSG_REQ pSG ); ? ??? //? SDMemWrite???????? - Write data to card from pSG scatter gather buffers DWORD SDMemWrite( PSD_MEMCARD_INFO pMemCard, PSG_REQ pSG ); ? ??? //? SDMemErase???????? - Erase a contiguous set of blocks DWORD SDMemErase( PSD_MEMCARD_INFO pMemCard, PDELETE_SECTOR_INFO pDSI ); ? ??? //? SDMemEraseAll????? - Erase all blocks DWORD SDMemEraseAll( PSD_MEMCARD_INFO pMemCard ); ? // // SDCardIO // ? ?? ?//? SDMemDoBusRequest? - Perform a bus request, returns Windows Status DWORD SDMemDoBusRequest( PSD_MEMCARD_INFO? pMemcard, ???????????????????????? UCHAR???????????? Command, ???????????????????????? DWORD???????????? Argument, ???????????????????????? SD_TRANSFER_CLASS TransferClass, ???????????????????????? SD_RESPONSE_TYPE? ResponseType, ???????????????????????? ULONG???????????? NumBlocks, ???????????????????????? ULONG???????????? BlockSize, ???????????????????????? PUCHAR??????????? pBuffer, ?????? ??????????????????DWORD???????????? Flags); ? ??? //? SDMemSetBlockLen?? - Sets read/write block length for SD memory card DWORD SDMemSetBlockLen( PSD_MEMCARD_INFO pMemcard, ??????????????????????? DWORD??????????? BlockLen ); ? ??? //? SDMemReadMultiple? - Read multiple 512 byte blocks of data from card DWORD SDMemReadMultiple( PSD_MEMCARD_INFO pHandle, ???????????????????????? ULONG??????????? StartBlock, ???????????????????????? ULONG??????????? NumBlocks, ???????????????????????? PUCHAR?????????? pBuffer ); ? ??? //? SDMemWriteMultiple - Write multiple 512 byte blocks of data to card DWORD SDMemWriteMultiple( PSD_MEMCARD_INFO pHandle, ????????????????????????? LONG???????????? StartBlock, ????????????????????????? LONG???????????? NumBlocks, ????????????? ????????????PUCHAR?????????? pBuffer ); ? ??? //? SDMemWriteUsingSingleBlocks - Write using single block writes DWORD SDMemWriteUsingSingleBlocks( PSD_MEMCARD_INFO pHandle, ?????????????????????????????????? LONG???????????? StartBlock, ??????????????????? ???????????????LONG???????????? NumBlocks, ?????????????????????????????????? PUCHAR?????????? pBuffer ); ? ??? //? SDMemDoErase - Erase a contiguous set of blocks DWORD SDMemDoErase( PSD_MEMCARD_INFO pHandle, ??????????????????? LONG???????????? StartBlock, ??????????????????? LONG???????????? NumBlocks ); ? DWORD SDAPIStatusToErrorCode( SD_API_STATUS Status ); ? DWORD SDGetCardStatus(PSD_MEMCARD_INFO pMemCard , SD_CARD_STATUS *pCardStatus); ? VOID HandleIoctlPowerSet(PSD_MEMCARD_INFO?????? pMemCard, ??????? ?????????????????PCEDEVICE_POWER_STATE? pDevicePowerState); VOID InitializePowerManagement(PSD_MEMCARD_INFO pMemCard); VOID DeinitializePowerManagement(PSD_MEMCARD_INFO pMemCard); SD_API_STATUS IssueCardSelectDeSelect(PSD_MEMCARD_INFO pMemCard, BOOL Select); VOID RequestEnd(PSD_MEMCARD_INFO pMemCard); ? SD_API_STATUS RequestPrologue(PSD_MEMCARD_INFO pMemCard, DWORD DeviceIoControl); |
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SD on MX31 ADS
Secure Digital Host Controller
The Secure Digital Host Controller (SDHC) 模塊支持MMC，SD和Secure Digital I/O and Combo Cards (SDIO)三種。MX31一共有2個SDHC硬件模塊。一個host controller 只支持連接上的一個卡。
| SDHC.DLL由以下源代碼組成 『―――― 微軟代碼 ? ??c:\macallan\private\winceos\coreos\ceosutil\utiltree.cxx ??? c:\macallan\public\common\sdk\inc\svsutil.hxx ??? c:\macallan\private\winceos\coreos\ceosutil\utilmemf.cxx ??? c:\macallan\public\common\sdk\inc\svsutil.hxx ??? c:\macallan\private\winceos\coreos\ceosutil\utilmem.cxx ??? c:\macallan\private\winceos\coreos\ceosutil\svsutil.cxx ??? c:\macallan\public\common\oak\drivers\sdcard\sdcardlib\sdcardapistubs.cpp ??? c:\macallan\public\common\oak\drivers\sdcard\sdcardlib\sddebug.cpp ??? c:\macallan\public\common\oak\drivers\sdcard\sdcardlib\sdmemapi.cpp ??? c:\macallan\public\common\oak\inc\block_allocator.hxx c:\macallan\public\common\oak\drivers\sdcard\sdhclib\sdhclib.cpp ―――――』 d:\wince500\platform\mx31\src\drivers\sdhc\bspsdhc.c ??? d:\wince500\public\common\oak\csp\arm\freescale\mxarm11\drivers\sdhc\main.cpp ??? d:\wince500\public\common\oak\csp\arm\freescale\mxarm11\drivers\sdhc\sdcontrol.cpp d:\wince500\public\common\sdk\inc\kfuncs.h
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SDHC的注冊表設置
| #if (defined BSP_SDHC1 || defined BSP_SDHC2) [HKEY_LOCAL_MACHINE\Drivers\SDCARD\ClientDrivers\Class\SDMemory_Class] "BlockTransferSize"=dword:100 ; Overwrite from default 64 blocks. ; "SingleBlockWrites"=dword:1 ; alternatively force the driver to use single block access [HKEY_LOCAL_MACHINE\Drivers\SDCARD\ClientDrivers\Class\MMC_Class] "BlockTransferSize"=dword:100 ; Overwrite from default 64 blocks. ; "SingleBlockWrites"=dword:1 ; alternatively force the driver to use single block access [HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\MMC] "Name"="MMC Card" "Folder"="MMC" [HKEY_LOCAL_MACHINE\System\StorageManager\Profiles\SDMemory] "Name"="SD Memory Card" "Folder"="SD Memory" #endif IF BSP_SDHC1 [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SDHC_ARM11_1] "Order"=dword:21 "Dll"="sdhc.dll" "Prefix"="SDH" "ControllerISTPriority"=dword:64 "Index"=dword:1 ENDIF ;BSP_SDHC1 IF BSP_SDHC2 [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\SDHC_ARM11_2] "Order"=dword:21 "Dll"="sdhc.dll" "Prefix"="SDH" "ControllerISTPriority"=dword:64 "Index"=dword:2 ENDIF ;BSP_SDHC |
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SDHC和DMA
| SDHC驅動支持DMA 和非DMA 2種數(shù)據(jù)傳輸模式，默認是DMA。For every request submitted to it, the driver attempts to build a DMA Scatter Gather Buffer Descriptor list for the buffer passed to it by the upper layer. For cases where this list cannot be built, the driver falls back to the non-DMA mode of transfer. The default configuration is maintained in the file bsp_cfg.h using the parameters BSP_SDMA_SUPPORT_SDHC1 and BSP_SDMA_SUPPORT_SDHC2. A value of TRUE means DMA is the default mode, and for cases where DMA cannot be used, the driver falls back to a non-DMA mode. A value of FALSE means non-DMA mode is the default and DMA mode will not be attempted. For the driver to attempt to build the Scatter Gather DMA Buffer Descriptors, the upper layer should ensure that the buffer meets the following criteria. ? Start of the buffer should be a word aligned address. ? Number of bytes to transfer should be word aligned. Due to cache coherency issues arising due to processor and SDMA access of the memory, the above criteria is further stringent for the read or receive operation (it is not applicable for write or transmit): ? Start of the buffer should be a cache line size (32 bytes) aligned address. ? Number of bytes to transfer should be cache line size (32 bytes) aligned. |
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電源管理
| The primary methods for limiting power in SDHC module is to gate off all clocks to the controllers and to cut off power to the card slot when no cards are inserted. When a card is inserted to any of the slots, that slot alone is powered and the clocks to that controller alone are gated on. While using memory cards, the clock to the host controller and the clock to memory cards are gated off when ever the controller is idle. For SDIO cards, both the clocks stay on all the time. SDHC driver supports the full power on and full power off states. In full power off state, the clocks to the controllers and the power to the inserted cards are turned off. When powered on, all cards inserted before and after the power down will be detected and mounted. PowerUp This function is implemented to support resuming a memory card operation that was previously terminated by calling PowerDown() API. Power to the card is restored, clocks to the pertaining controller is restarted. SDHC driver is notified of a device status change. This results in signaling the SD bus driver of a card removal followed by a card insertion. The card is re-initialized and is mounted so that the all operations scheduled during a power down resumes. SDIO cards will be initialized on resume. The details of this architecture and its operation can be found in the Platform Builder Help under the heading “Power On and Off Notifications for Secure Digital Card Drivers”, or in the online Microsoft documentation at the following URL: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wceddk5/html/wce50conpoweronoffnot ificationsforsecuredigitalcarddrivers.asp Note that this function is intended to be called only by the Power Manager. PowerDown This function has been implemented to support suspending all currently active SD operations just before the entire system enters the low power state. Note that this function is intended to be called only by the Power Manager. This function gates off all clocks to the controllers and powers down all the card slots. |
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LP1070 Secure Digital I/O Wi-Fi Driver
SDIO Wi-Fi 驅動是通過Freescale LP1070 SDIO Wi-Fi 卡來連接到一個IEEE 802.11b/g 無限局域網(wǎng)(WLAN) 。驅動支持以54 Mbps的速率和WLAN通訊。
| 注意： The LP1070 SDIO Wi-Fi driver is an NDIS 5.0 compliant miniport driver. LP1070 SDIO Wi-Fi card needs a 3.1~3.3V power supply from on-board Secure Digital Slot. |
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| [HKEY_LOCAL_MACHINE\Drivers\SDCARD\ClientDrivers\Custom\MANF-0325-CARDID-0217-FUNC-1] "Instance0"="FSL1070NdisSD:FSL1070NdisSD1" "Prefix"="NDL" "Dll"="FSL1070NdisSD.dll" [HKEY_LOCAL_MACHINE\Comm\FSL1070NdisSD] "ImagePath"="FSL1070NdisSD.dll" "Group"="NDIS" "DisplayName"="WaveBlaster 802.11 SDIO Adapter" [HKEY_LOCAL_MACHINE\Comm\FSL1070NdisSD\Linkage] "Route"=hex(7):\ 46,53,4c,31,30,37,30,4e,64,69,73,53,44,31,00,00,00,00 [HKEY_LOCAL_MACHINE\Comm\FSL1070NdisSD1] "ImagePath"="FSL1070NdisSD.dll" "Group"="NDIS" "DisplayName"="WaveBlaster 802.11 SDIO Adapter" [HKEY_LOCAL_MACHINE\Comm\FSL1070NdisSD1\Parms] "SDIOMaxClockFreq"=dword:017d7840 "SDIOMaxByteNumber"=dword:000003e8 "SDIOMaxBlockNumber"=dword:000003e8 "SDIOBlockSize"=dword:00000040 "SDIOSupportBlockMode"=dword:00000001 "SDIOSupport4BitMode"=dword:00000001 "BluetoothCoexCapability"=dword:00000000 "CcxCapability"=dword:00000000 "RadioMeasurementCapability"=dword:00000000 "MultiDomainCapability"=dword:00000000 "RoamRssiHysteresis80211bg"=dword:0000000a "RoamRssiThreshold80211bg"=dword:ffffff9d "ListenInterval"=dword:00000000 "BufferConfig"=dword:00000000 "DbgMaxFileSize"=dword:00019000 "WMMEnabled"=dword:00000000 "ResetEnable"=dword:00000001 "UWASensitivityLockout"=dword:00000000 "ShortPreamble"=dword:00000001 "RTSCTSThreshold"=dword:0000092b\ "FragmentThreshold"=dword:0000092a "DefaultKey3"="0x0000000000" "DefaultKey2"="0x0000000000" "DefaultKey1"="0x0000000000" "DefaultKey0"="0x0000000000" "LongKeys"=dword:00000000 "Auth"=dword:00000000 "WEP"=dword:00000000 "PowerSaving"=dword:00000000 "RateSelect"=dword:00000000 "MACID"="0x000000000000" "IbssChannel"=dword:00000000 "Ibss54g"=dword:00000000 "RestrictedChannel"=dword:00000000 "BSSID"="0x000000000000" "Manual"=dword:00000000 "ESSID"="" "Domain"=dword:00000010 "ProtocolType"=dword:00000003 "NetworkType"=dword:00000000 "STAuwa"="uwa_airoha.bin" "STAupper"="mac_airoha_STA.bin" "NetworkAddress"="" "BusType"=dword:00000000 "BusNumber"=dword:00000000 [HKEY_LOCAL_MACHINE\Comm\FSL1070NdisSD1\Parms\Tcpip] "Subnetmask"=hex(7):\ 32,35,35,2e,32,35,35,2e,32,35,35,2e,30,00,00,00,00 "IpAddress"=hex(7):\ 30,2e,30,2e,30,2e,30,00,00,00,00 "UseZeroBroadcast"=dword:00000000 "EnableDHCP"=dword:00000001 |
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SD on EVT
目前在EVT板上，對于SD的代碼更改如下：
| 1???????? ***************************************** 2???????? *********************************************** |
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附錄
SD卡與其他卡的對比
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SDHC
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| Compatibility |
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* SDHC Host Products can use both SD and SDHC Memory Cards. |
| Capacity (4GB SDHC Memory Card)
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常用網(wǎng)站：
http://www.sdcard.com/
http://www.sdcard.org/
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posted on 2007-02-11 10:09 Titan 閱讀(17472) 評論(29) ?編輯 收藏 網(wǎng)摘 所屬分類: Windows CE
評論
I think high Capacilty SD is not supported in MS code library....You need to modify code. 2007-03-29 15:03 |? ????????
哥們兒太專業(yè)了！我想問一下那里有SD WiFi 在Windows XP下的驅動。請賜教！多謝！急！！！ 2007-04-17 00:09 |
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太牛比了，我要常來 2007-05-04 19:26 |? ????????
非常感謝你的發(fā)表！我正好發(fā)愁要怎樣寫一個CLIENT DRIVER用在mx31上， 你的發(fā)表讓我了解許多。 2007-08-01 14:34 |? ????????
有一個請求。我的ｉｍｘ３１ＡＤＳ ｂｓｐ 里沒有LP1070 Secure Digital I/O Wi-Fi Driver， 可不可以發(fā)給我呢？2007-08-01 18:35 |
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WinCE5下SDIO接口的性能比較差，WinCE6（Mobile5）里對bus層和SDHC作了些改進，增加了fast-path機制，性能有所改進。不過像WLAN設備最好還是用monolithic的SDIO driver，優(yōu)點是吞吐率有很大提高，缺點是移植起來比較麻煩。博主是做memory卡的還是做WiFi設備的，以后多交流啊 2007-08-02 16:33 |
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你有msn嗎，可否一起探討一下sd card drvier 2007-08-14 22:41 |? ????????
謝謝您。您的文章讓我受益匪淺，我前些天買了一個4G的SDHC卡，結果不能和我的機器兼容（Acer N300 BW，WM5.0系統(tǒng)，S3C2410的CPU），想看看能不能自己驅動。 2007-08-22 00:37 |? ????????
謝謝 2007-10-22 21:30 |? ????????
I am going to develop a product based on SDHC card(both hardware and software,embeded). Will you please e-mail a copy of SDHC specification to raysys@126.com? Thanks a lot. 2007-10-23 22:23 |? ????????
我現(xiàn)在的系統(tǒng)為ARM9+CE50，支持SD接口，以支持SD卡的讀寫。我希望能找到提供CE driver的SD WLAN卡，若有相關信息，請通知我x10@emtronix.com.cn。謝謝！ 2007-12-05 18:12 |? ????????
我有問題請教，我現(xiàn)在使用的S3C3445單片機，想使用wince自帶的SD卡驅動，修改后使用。我的硬件接口和寄存器配置應該在哪里添加上去，我沒有找到相應的文件，麻煩您能給我一些幫助 2007-12-17 14:26 |? ????????
我有問題要請教 請問買數(shù)碼相機帶內存卡嗎？ 2008-01-18 12:15 |? ????????
不錯 2008-01-23 16:45 |? ????????
有個問題想問：我目前使用的是PXA270的板子
之前我在改注冊表中關于SD的ORDER的數(shù)值時候發(fā)現(xiàn)
當ORDER的數(shù)值改為小于15的時候，系統(tǒng)啟動后找不到SD的圖標（感覺像是沒有被加載）但是當將ORDER的數(shù)值改為大于15時候就ok。（DMA的ORDER的數(shù)值是為5）
希望樓主不惜賜教
謝謝 2008-01-23 16:50 |
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今天又來看,收獲不小,謝謝樓主 2008-02-04 14:21 |? ????????
continuous up! 2008-03-01 21:56 |? ????????
博主，你還真專業(yè)，頂你，網(wǎng)絡上多幾個想你這樣的人，我們就方便多了 2008-04-03 22:38 |? ????????
本人新買的東芝ＳＤＨＣ Ｍｅｍｏｒｙ Ｃａｒｄ ４ＧＢ，在電腦ＷＩＮ ＸＰ未能顯示，是否要裝驅動程式，請指教，多謝． 2008-04-14 00:45 |? ????????
我想知道怎么才能讀到SD HC的卡，因為我現(xiàn)在的讀卡器沒有讀到呢 2008-05-12 13:27 |?[樓主] ??????????
@ALEX80SD 2.0的協(xié)議里通過CMD8這個命令是否有返回來決定當前的SD設備是V2.0，即SDHC. 2008-05-12 14:16 | ?
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很全面的介紹，不錯~ 2008-05-16 12:35 | ?? ????????
我在作linux sdio, 你的wince 參考代碼發(fā)給我一份好嗎？謝謝！
sun.xueqin75＠gmail.com
2008-08-18 21:35 |
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請求：各位DX能否提供一個裝在SD卡上，插入設備直接運行即可實現(xiàn)支持大容量SD卡的程序嗎？原因：本人購買的一個導航盒現(xiàn)在只能支持2G以下的SD卡，遠遠不能滿足我安裝多個導航軟件的需求，我希望能它能支持4G、8G的卡。
設備的參數(shù)是：主頻400MHZ，主芯片型號SANSUNG S3C2440A-40，操作系統(tǒng)WINCE5.0，軟件編譯類型ARMV4I，內存64MB，存儲卡SD卡。
聯(lián)系方式：antee@163.com
不勝感激！！！！ 2008-11-02 12:37 |
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請問在WM系統(tǒng)上的 設置-》系統(tǒng)-》關于 中 擴展槽 的使用情況接口是在哪設置啊？ 比如插入T卡就顯示，擴展槽已使用，沒插入T卡就顯示擴展槽未使用。謝謝！ 2008-12-24 16:34 |?[樓主] ??????????
這個信息是通過一個注冊表值來設定的。你在文檔里搜SCKT.
Mobile的問題不好公開討論，如果有不理解請發(fā)到我郵箱：songtitan@msn.com 2008-12-24 16:39 | ?
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我現(xiàn)在也在開發(fā)SDIO Client驅動，碰到了很多問題，能否向各位請教一下，謝謝了。我在開發(fā)時，使用SDRegisterClient函數(shù)時，總是返回錯誤，各位碰到過這樣的問題嗎？
還有能否在pocket pc 2003下開發(fā)SDIO的Client驅動，看了很多的函數(shù)都說是WINCE 5.0以后
才支持的，那么在2003下具有SD接口的POCKET PC如何開發(fā)SD驅動。
在這上面隔了很久了，那位能指點一下啊，謝謝了。
我的郵箱：siguoc@yahoo.com.cn qq：46236863 msn:siguoc@hotmail.com 希望能夠收到各位的回信，非常謝謝。 2009-01-09 01:09 |
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請求：各位DX能否提供一個裝在SD卡上，插入設備直接運行即可實現(xiàn)支持大容量SD卡的程序嗎？原因：本人購買的一個導航盒現(xiàn)在只能支持2G以下的SD卡，遠遠不能滿足我安裝多個導航軟件的需求，我希望能它能支持4G、8G的卡。
設備的參數(shù)是：主頻400MHZ，主芯片型號SANSUNG S3C2440A-40，操作系統(tǒng)WINCE5.0，軟件編譯類型ARMV4I，內存64MB，存儲卡SD卡。
聯(lián)系方式：nxycfb@126.com
不勝感激！！！！ 2009-04-21 09:04 |
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求：各位DX能否提供一個裝在SD卡上，插入設備直接運行即可實現(xiàn)支持大容量SD卡的程序嗎？原因：本人購買的一個導航盒現(xiàn)在只能支持2G以下的SD卡，遠遠不能滿足我安裝多個導航軟件的需求，我希望能它能支持4G、8G的卡。
設備的參數(shù)是：主頻400MHZ，主芯片型號SANSUNG S3C2440A-40，操作系統(tǒng)WINCE5.0，軟件編譯類型ARMV4I，內存64MB，存儲卡SD卡。
聯(lián)系方式：nut3721@163.com
不勝感激！！！！ 2009-05-05 00:44 | #1樓? ??回復??引用????
轉載于:https://www.cnblogs.com/gmh915/archive/2009/06/16/1945433.html
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