Putting the whole thing in user space would be okay. Presumably I would have to use gadgetfs to communicate with the controller. Where is the gadgetfs source and documentation?
Start at http://www.linux-usb.org/gadget ... gadgetfs is in BK, and there's an example program (updated version of what I posted to this list a while back).
I may submit gadgetfs after I update SET_CONFIGURATION handling. Right now there's no way to synchronize that with userspace, because of an artifact in how the original requirements were written; it should be treated like any other control request. That lack of synchronization exposed a problem, though I think the real issue was sigwait() bug on a 2.4.19 ARM system, which kept the ep0 event thread from getting scheduled.
- Dave
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