The fasted way to get the clear picture is insert a USB analyzer between the xHCI host and this FS gps dev.
The USB trace will display the procedure to you.
On the other hand, EHCI and xHCI is mutually excluded, namely, if the host is xHCI, then it should not be EHCI.
This is not the case for EHCI and OHCI and UHCI, where they exists in the same host with each other, responsible for HS and FS/LS respectively, where xHCI consolidate the SS, HS, FS into one for all case.
According to my experience, for xHCI host certification of USB-IF, the USB-IF designated 150 device, which include HS and FS/LS devices, does not happened the same case as you describes.
I have test the SS known good device, 150 device on NEC(RENESAS), INTEL, fresco and even TI host.
What xHCI host are you use now?
I have several tips, but maybe not correct:
For example:
if the device fall into low speed, but xHCI not support LS?
At 2014-10-09 13:48:48, “Aadhya” wrote:
Hi All, I am really stuck here. I appreciate any kind of help here.
On Tue, Oct 7, 2014 at 10:59 AM, wrote:
I got a USB 1.1 OEM GPS device. It is already certified in Win7 and trying
to certify in Win8.
In Win8 all tests are passed except “HCK related” tests. Tests are failing
saying that “Device should be connected behind xHCI”.
The problem is I can’t see my device behind xHCI.
I have got a Dell Desktop with xHCI controller, but only USB3.0 devices are
listed under xHCI. But my device is always listed under “EHCI” controller.
Also I tried TI 3.0 HUB and other USB 3.0 Superspeed HUB which are detected
under xHCI. But again, if I connect my device to those USB3.0 HUBs, it
still gets listed under EHCI.
So I am really frustrated after chasing Dell to find a machine which gives
direct xHCI ports w/o any logical mapping.
So I couldn’t certify on Win8 yet.(But I have tested and running Win7
certified version of drivers w/o any issues)
Please help me here.
Thanks
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