Gianfar on 8347 sometimes get stuck at startup

[SIP COP 009]

Ok, we found the root cause. It is the MARVELL PHY 8e1111 which was to
blame. The PHY needs an explicit RESET after any changes are done to the
config. After doing this, the problem goes away.

On 2/22/07, Gary Kenaley <gkenaley at echelon.com> wrote:
>
>  I see a similar problem on the MPC8349E MDS (V1.1 CPUs) in that the first
> ping or tftpboot command often doesn't work in u-boot 1.1.3 or (much less
> often) Wind River Linux kernel 2.6.14. The problem seems least severe on a
> node-to-node gigabit connection and most severe on a public 100BT network. I
> haven't been able to isolate the cause, but the severity seems dependent on
> the driver characteristics of the equipment that the 8349 is communicating
> with. In my case I also see very erratic ping times to the NFS server
> (dependent on how Kudzu configured its e1000 driver). The 8349 sometimes
> slows to a crawl and fills the logs with watchdog messages when it mounts
> NFS partitions and hits the INIT phase of boot-up. This is all with
> out-of-the box software from Motorola and Wind River. Maybe we will have
> better luck with the V3.0 CPUs? I wish I could use 2.6.18, but I'm stuck
> at 2.6.14.
>
> Regards, Gary
>
> ------------------------------
> *From:* linuxppc-embedded-bounces+gkenaley=echelon.com at ozlabs.org on
> behalf of SIP COP 009
> *Sent:* Thu 2/22/2007 9:14 PM
> *To:* linuxppc-embedded at ozlabs.org
> *Cc:* sipcop009 at gmail.com
> *Subject:* Gianfar on 8347 sometimes get stuck at startup
>
>
> We have the our own MPC8349 based board which has 2 GigEs. It is pretty
> much modelled similar to the 8349ADS EVAL boards, infact we have zero
> changes.
>
> The issue that we are seeing -
>
> Sometimes at startup, we have send 2 TX packets to kind-of-kickstart the
> TSEC Tranmission. If we send only packet it does not get to the other side.
> This does not happen always.
>
> The TSEC Registers dont really show any errors nor does the Marvell PHY
> show any errors.
>
> The kernel that we are using is 2.6.11.
>
> Anybody  seen this before or something similar ?
>
> Any pointers will be appreciated. We cannot move to any other kernel
> verision right now.
>
> Thanks!
> ashutosh
>
>
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