> > On Thu, Nov 16, 2017 at 10:20 AM, Peter Chen <peter.chen@xxxxxxx> wrote:
> >>
> >>> >
> >>> > All USB registers, including USB transceiver, USB non-core, and USB core.
> >>>
> >>> I need to have some time to go to the platform again. It will be possible this
> weekend.
> >>> Have you any idea to restrict the debug apart register dump?
> >>>
> >>
> >> I am afraid I don't have since imx25 is too old, I have little directly experiences on
> it.
> >>
> >
> > I have done some testing on top. I can not easily dump registers on
> > the 2.6.31. I have recompile the old kernel and re-instrumented it.
> > Well I don't find any important thing.
> >
> > The old kernel was using ehci_fsl.c basecode and the new one use
> > chipidea. Let's say that some changes are in USB_CTRL usbmisc
> > controller initialization but even play with those bits I did not find
> > any failure on that side. I will continue on difference. Hope that
> > some other have some idea ;).
>
> I have used a usb hardware tracer. What I can say that basically after the reset the
> device try to go in HIGH SPEED mode but the controller can only manage full speed
> even is an ehci.
>
> I have tried the errata to set PFSC bit but is even set from the dts if we force the
> FULL SPEED mode.
>
>
> Michael
>
Michael, it may have some trick things for imx25, I highly recommend compare the registers
between work model and non-work model. You may use 'memtool' which at unit_tests folder
which should be in Freescale released rootfs to dump registers.
Peter
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