[Soekris] NatSemi and Cable Issues: REBORN!

[Daniel Prather]

Soren Kristensen wrote:

> The DP83816 used on the net4801 should not have the "short cable issue" 
> present on the DP83815 used on the net4501. Any driver that try to "fix" 
> the non existing issue could break things....
> 

These are the DP83815 chips.  We got these net4801 boards about a month
to month and a half ago from you guys.

> Have you tried the lastest DP83815/6 Linux driver available at:
> http://www.national.com/appinfo/networks/macphyter2.html
> 

Yep, we have the latest one.  They still have the issue.  It looks like
we might be able to disable the cable magic and fix it on these boards,
of course, that means that they'll have the short cable problem.  So
we'll just have to work to keep track of it.

> Looking as the source I can see that the driver do not do the "short 
> cable issue" fix on chips rev x0505 (the DP83816 on the net4801), only 
> early revs.
> 
> But NSC do list another bug in the DP83816 errata list related to cable 
> lenghts of 0-25m, but according to NSC that should only result in the 
> chip sometimes tag good packets as having CRC errors, not the total 
> lockup experienced with the DP83815. But I'm not even sure if that bug 
> still is present the the latest rev of the DP83816 used on the net4801, 
> as my errata list is from March 27, 2002. I'm trying to get a newer list....
> 
> 
> Regards,
> 
> 
> Soren
> 
> 
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-- 
Daniel Prather
CityNet LLC
daniel at citynetwireless.net
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