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Re: [Qemu-ppc] [Qemu-devel] ppce500 usb-ehci-pci issue on last uboot

From: luigi burdo
Subject: Re: [Qemu-ppc] [Qemu-devel] ppce500 usb-ehci-pci issue on last uboot
Date: Wed, 27 Sep 2017 12:21:30 +0000

hi Gerd,
yes the host is a big endian but i can test it on an little endian host too and 
About xhci or ohci the uboot dont recognize it . ehci-pci are the only usb pci 
board from where uboot on ppce500 vm  can make the load from device or use 
directly the device attached on  it if cmd reset work for initislize the board.


Inviato da iPad

> Il giorno 27 set 2017, alle ore 13:34, Gerd Hoffmann <address@hidden> ha 
> scritto:
>  Hi,
>> "actually, I tried it yesterday and it seems to be a bug in qemu in
>> case you reset the EHCI controller, it doesn't come out of reset for
>> whatever reason ... so you probably want to talk to the qemu guys,
>> it's when U-Boot sets USBCMD RESET bit and then does handshake, the
>> controller is stuck with reset bit asserted"
>> i ask if possible to fix it?
> Nothing obvious in the ehci reset code.  Needs someone debugging it ...
> Is this on a bigendian host?  If so this could be endian bugs in the
> ehci emulation.
> You could also try xhci or ohci instead, these are known-working on
> bigendian hosts (used by ppc64 pseries).
> cheers,
>  Gerd

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