[U-Boot-Users] PPC4xx enet crossover

[Mike Nuss]

Stefan Roese wrote:
> On Monday 03 March 2008, Mike Nuss wrote:
> > I'm using a PPC440EPx with a Marvell PHY (same as on 
> Sequoia). If I connect
> > to a PC with a crossover Ethernet cable, U-Boot sees a link 
> but the PC does
> > not. The PC (running Linux) reports "Autonegotiation failed 
> (remote fault)"
> > and ethtool reports no link.
> 
> Did you really try to communicate with the PC in this 
> situation? Please note 
> that the PHY is only initialized upon ethernet usage. So if 
> you just turn on 
> the Sequoia and stop on the U-Boot prompt, no real PHY 
> configuration will 
> happen.

Yes, I set the ipaddr variable and tried to do a ping. U-Boot reported the PHY autonegotiation succeeding but reported the remote host as down, and the PC logged the autonegotiation error.

Oddly enough, I tried a different PC (with a different NIC) and it worked there. But I'm reluctant to blame the NIC on the first machine, since it worked fine once Linux was running on the PowerPC.

Mike