I am trying to validate the USB on an embedded platform based on the NXP i.MX7. So far I have only been able to validate root ports on the board but also have a PCIe xhci controller and a microchip USB3503 hub off of the HSIC port on the SoC which I would like to run the tests on. I have reviewed the mailing list archives and found another discussion of using the EHSET driver to validate a driver and they reference the same issue I am seeing. When I plug in the device I see usb_ehset_test: probe of <port path> failed with error -32 for either the PCIe root hub or the USB3503 HSIC hub. Further down in the mailing list chain Peter Chen states > Besides, do not connect HUB between your host board and emulation board > (for sending VID/PID). but there is no additional information regarding this statement. Looking around it looks like the hubs have some mechanism for being tested[0] and the HSETT application for Windows supports testing of hubs according to the documentation.[1] Is this something there exists a module for or are either of these cases unexpected behavior for the EHSET kernel module? Allen [0] http://www.testusb.com/Hub_test.html [1] https://usb.org/sites/default/files/HSETT_Instruction_0_4_1.pdf
