[U-Boot] tftp booting the panda board

[Simon Glass]

On Mon, May 9, 2011 at 2:02 PM, Gilles Chanteperdrix <
gilles.chanteperdrix at xenomai.org> wrote:

>
> Hi,
>
> I am trying to tftpboot the panda board, this basically works, but I
> still have some issues.
>
> The panda board uses an SMSC95xx chip, and so requires USB2.0
>
> Using the u-boot git head, we have support for network adapters over
> USB, and the patches from Simon Glass, we get support for the ethernet
> chip. So, the only missing piece of the puzzle is USB EHCI for OMAP4/Panda.
>
> I tried to implement it, the patches will follow shortly, but have
> several remaining issues:
> - the EHCI stop routine, implemented as in the Linux kernel driver, has
> timeouts when trying to wait for the UHH reset;
> - the SMSC95XX is unstable, if I start USB, stop USB, then start again,
> the SMSC95XX initialization hangs, this does not happen without this driver
>

This is a bug in USB net I think, rather than just this driver. I have not
looked at it yet but patches are welcome!


> - if I launch bootp, and say, the server does not answer to the bootp
> protocol, the smsc95xx driver does not seem to be able to recover from
> the first timeout, any further attempt causes a timeout.
>

This may or may not be related - again I have seen this and it also happens
with Asix.

Regards,
Simon

>
> Regards.
>
> --
>                                                                Gilles.
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