[U-Boot] [PATCH 3/7] fec_imx27: driver for FEC ethernet controller on i.MX27

[Eric Lammerts <u-boot@lists.lammerts.org>]

On 06/15/09 10:01, Johan wrote:
> I have trouble using your patch together with our LogicPD iMX27
> Litekit. Seems like the FEC driver does not work well. Here is some
> output from when I try to load files with tftp

<snip>
> Loading: #####T #####################T #########################T ############T#
>          #########################T ########################################
>          ##T ####################################T #########T T #########
> Retry count exceeded; starting again

<snip>
> I have downloaded the imx27lite head from the u-boot testing branch. I
> have also tried to patch the u-boot-2009.06-rc3 branch with your
> patches, but it does not seem to be any different. Do you have any
> ideas what might be wrong?

Did you have working ethernet before (with a different bootloader or in
Linux)? Do you have the breakout board installed? I have the same board
(but maybe an older revision; about a year old) and with the breakout
board mounted my ethernet would behave the same way as yours. They routed
the MII signals all the way to the headers on the breakout board, and
that causes signal integrity problems. It could be that they fixed it on
later revisions though (not sure).

I'm using u-boot-v2, so I don't know anything about the u-boot fec driver.

Eric