Subject: Re: [PATCH 0/3] usb: ehci ppc device-tree-aware driver

From: Valentine Barshak <[email-masked]>
Date: Mon, 08 Oct 2007 22:18:22 +0400

Jerone Young wrote:
> So the issue here with the Sequoia board is that if you load a kernel or
> initrd from usb stick while under u-boot environment, when Linux boots
> it will see the network adapter & even set an ip for it. But no matter
> what it is unable to access any outside ip.
> 
> The way we recreated this scenario was:
> 
> - Have a USB stick with
>     - partition 1 is fat partition with our kernel & initrd
>     - partition 2 is ext3 with our root filesystem
> 
> 1) Boot Sequoia board with USB stick plugged in. Go to u-boot prompt.
> 2) start usb using "usb start"
> 3) Load kernel off usb stick using "fatload" command in uboot
>    * Optionally load initrd off of usb stick
>    * Example:
>       fatload usb 0:1 4000000 cuImage.sequoia
>     
> 4) stop usb using "usb stop"
> 5) Then boot kernel using bootm
> 
> Now from this point linux loads and will mount the filesystem on the usb
> stick.  But if you want to use networking in anyway you have a problem.
> You can start the telnet daemon and access from the board using
> 127.0.0.1 address (loopback). Trying to access the telnet from an
> outside ip is unsuccessful.
> 
> Also, if you have it setup so that the root filesystem is on a nfs root,
> the kernel is never able to get to the nfs root. Basically something is
> really borked.
> 
> I'm a little late getting back to this email :-0
> 
> On Sat, 2007-09-22 at 23:00 +0000, Hollis Blanchard wrote:
>> On Mon, 17 Sep 2007 16:50:39 +0400, Valentine Barshak wrote:
>>
>>> Some PowerPC systems have a built-in EHCI controller.
>>> This is a device tree aware version of the EHCI controller driver.
>>> Currently it's been tested on the PowerPC 440EPx Sequoia board.
>>> Other platforms can be added later.
>>> The code is based on the ehci-ppc-soc driver by Stefan Roese <[email-masked]>.
>> We're having a strange issue on our Sequoia where the network stops
>> functioning when USB is active. Jerone can supply more detail...
>>
>> Have you seen anything like that?
>>
> 
Please try this patch:
http://ozlabs.org/pipermail/linuxppc-dev/2007-October/043435.html
Thanks,
Valentine.
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