On 19-09-10 22:01:58, Allen Blaylock wrote: > 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. EHSET is used to test embedded host electrical signal required by USB IF Compliance Test, not test the signal for USB HUB, since the EHSET module could only let embedded host controller enter test mode by writing TEST MODE registers follows EHCI or xHCI spec. Maybe the USB HUB could let its port enter test mode, but it needs to use other ways, maybe vendor specific commands. For your PCIe xHCI controller, if it follows xHCI spec, it should work with EHSET, would you please debug it by code and see why return error? Peter > 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] https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.testusb.com%2FHub_test.html&data=02%7C01%7Cpeter.chen%40nxp.com%7C370e9acddb11494ec68008d7363a93fa%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637037497528612416&sdata=djXerGrLCkeITKRqg4KteuzNn5TMxeOhqif58DWJYUE%3D&reserved=0 > [1] https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fusb.org%2Fsites%2Fdefault%2Ffiles%2FHSETT_Instruction_0_4_1.pdf&data=02%7C01%7Cpeter.chen%40nxp.com%7C370e9acddb11494ec68008d7363a93fa%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637037497528612416&sdata=gem9tyxRAWIppDFW%2Fpw08dPKqQQ9NMX%2BhH19V2SloiQ%3D&reserved=0 > -- Thanks, Peter Chen
