> On Mon, Jan 15, 2018 at 2:35 PM, Michael Nazzareno Trimarchi > <mich...@amarulasolutions.com> wrote: > > Hi Peter > > > > On Mon, Dec 25, 2017 at 1:56 AM, Peter Chen <peter.c...@nxp.com> wrote: > >> > >>> > On Thu, Nov 16, 2017 at 10:20 AM, Peter Chen <peter.c...@nxp.com> > 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. > > > > The big difference I found is the way that they schedule request in > > periodic schedule introduce by > > 3ca9aebac2ebb8f56d2d097636b8c568320a9f87 from v3.10 > > > > After reading all the code and check every registers. I discovered that > problem is > before kernel start. For now is a magic mistery. I need to check bootloader > source > code. Old kernel and new kernel works in old bootloader. I need to understand > what > is done in the bootloader that make kernel not perfect working > I am glad you are close to answer :)
Peter
