03:38 <d1b2> <Rogan> This is interesting. I was wondering whether it was possible on Linux to simulate a hub with connected devices using the UDC subsystem, and was told it was not possible at all “that’s not how usb works” Is that just because the UDC is missing some required capability that can be implemented with an FPGA?

03:55 <d1b2> <Rogan> Ah, going back to the original thread (https://www.spinics.net/lists/linux-usb/msg133374.html), it seems that the problem is that the UDC hardware can’t be coerced into responding to multiple addresses.