[Help] USB Composite driver(usbccgp.sys) documentation

[SD_USB]

Hi everyone,
Just a question...is there any detailed documentation available on the USB Composite driver from Microsoft(usbccgp.sys)?

I came across a posting in the link,
http://www.techtalkz.com/microsoft-...ce-after-static-child-device-enumeration.html ,

wherein it was mentioned that calling WdfUsbTargetDeviceCreate() results in the following requests being sent down the stack:
1) Get device descriptor
2) Get first 9 bytes of config descriptor
3) Get all of config descriptor
4) Get status of device

is there a documentation available wherein the series of requests sent to usbccgp.sys for each of the WdfUsbXxx calls(made by the upper level USB client driver) mentioned?

Thanks
SD

 

[horheg]

Did you saw this ?
OSR's ntdev List: How to tell WdfUsbTargetDeviceCreate which interface of a composite device to use?

Or maybe the following could lead you to some usefull info........
Archive: USB Storage - FAQ for Driver and Hardware Developers
USB FAQ - Intermediate