EMB321 How To Write A Windows CE SDIO Client.ppt

EMB321How To Write AWindows CE SDIO Client Jay Loney - Program Manager Steve Schrock – Software Engineer Windows CE Microsoft Corporation Overview CE SDIO Stack Features What does the CE stack look like? How to write a client Bluetooth code walkthrough SDIO Support In CE 5.0 Dynamic insert/remove DMA (optional in standard host spec, platform dependent) SDIO interrupts Dynamic clock control Error recovery Wake-up Power will be handled using CE Power Manager Clients may be power-managed and tell the controller to put its slot into a different power state Multi-function and Combo devices Also support MMC v3.0 basic functionality In the next Windows Mobile release we’re adding: Support MMC v4.0 basic functionality Performance enhancements for single block cards The Secure In SD SDA SD Memory specification provides a mechanism to lock content to a specific machine We are not providing a block driver supporting it in 5.0 release explicitly. SDBus does allow you to build your own though Digital Rights Management (DRM) for all of CE is being supplied by a filesystem filter driver at a level above the SD Memory block driver CE 5.0 SDIO Architecture SD Bus Driver Enumerates cards to determine if MMC, SD Memory or SDIO Determines voltage to use for card Loads clients based on registry values Queues bus requests Queues asynchronous notifications from host controller Bus request completion, SDIO interrupts, device insertion/removal Performs error handling with retry Standard Host Controller SDA Host Working Group (MSFT executive member) Defined Standard Host Register Specification to standardize 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 Also support for PXa270, OMAP730, SMDK2410 Compatibility With SDIO Now! BSquare has an install base PPCs on the market today Target was to maintain client driver compatibility to ensure smooth transition of mark