[U-Boot-Users] IBM/AMCC 440EP ethernet question

Bradley Remedios bremedios at gmail.com
Fri Feb 18 01:18:55 CET 2005

On Tue, 15 Feb 2005 21:09:52 -0800, Miles Gazic <mgazic at earthlink.net> wrote:
> I'm using a 440EP with MII mode selected, and a Broadcom AC101L phy.
> Autonegotiation was failing, so as an experiment, I tried replacing the
> start of autonegotiation in 440gx_enet.c, with setting the speed
> manually.

I'm not sure if I can help much, but I've managed to get the Ethernet
on the 440EP working.  We have an RMII PHY and use the file

If you use that file, there are no major changes (for RMII) to be
completed.  There was a small bug in the code that occurs for 440
Processors.  I have yet to finnish my port so there are no completed
patches yet.  The bug is simple and simple to fix (a missing else
condition).  Just look for "if( get_pvr() == PVR_440GP_RB)" if you are

With the 405gp_enet.c code (I am not sure about the 440gx_enet.c code)
the default operation of the ZMII is RMII so you might want to check
that something similar has not been set in the 440gx_enet.c code.

Good Luck,
Bradley Remedios
bremedios at gmail.com

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