Hi, I've been toying with the idea of implementing USB2 test mode support to xhci-hub.c *but* the thing isn't straight forward in xHCI as it is in dwc3 peripheral side. Here are the questions: 1) How to figure out if $this xhci is the USB2 root hub not USB3 ? 1) What to do if user sends e.g. SetPortFeature(TEST_J) to USB3 Root hub ? Should we stall or just ignore ? 2) Is there any easy way to disable all port slots ? 3) Is there an abstraction for toggling run/stop bit ? (I guess so) 5) Should we expose that through debugfs to avoid having to cook up a Control Request with e.g. libusb ? (this is only needed for debugging) cheers -- balbi
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