Any pointers would be very appreciated. I'd be willing to put some work into this, with the ultimate goal to port it back to 2.4. I'm not exactly an USB wizard, tho ;p
I think starting with the existing 2.4 "sa1100usb_core" non-gadget code might be easier than starting with its 2.6 "usdevcore" sibling.
"Gadgetized" ep1/ep2 code could mostly just wrap the old code; there'd be a "usb_ep" queue head, "usb_request" objects would be submitted, and the old code would do one request at a time.
Modifying the ep0 code would be a bit harder. You'd certainly learn enough USB to be dangerous! Basically, the existing code has to be changed so that most everything is handed up to the gadget driver.
Try using the goku_udc code as a model.
- Dave
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