PCI support under 2.6.11.4 on MPC8272ADS ???

[Andrei Konovalov]

Hi Walt,

It may have nothing to do with your case,

but once I've seen incorrect data from lspci
when PCI clock was 66MHz and the card was 3COM 3C905
which is not 66MHz-capable.
And for MPC8272ADS boards we have the HRCW (read from CPLD)
defaults to 66MHz PCI clock.


Best regards,
Andrei

Wimer, Walt wrote:
> Using Vitaly's 2.4-based patch below as a starting point, I've been
> adding PCI support to 2.6.11.4 for the MPC8272ADS board.
> 
> The good news is that I think I have PCI interrupts pretty well sorted
> out, and I see *something* half-way reasonable from "lspci".
> 
> The bad news is that neither of the ethernet cards that I'm trying will
> actually work, and I see some very weird behavior with PCI configuration
> space:
> 
>   Card 1:  Some Realtek RTL8139D-based card
>   Card 2:  NETGEAR FA311 (National Semi DP83815 chip)
> 
> With either card installed alone, both U-Boot and my kernel identify the
> cards correctly in PCI configuration space.
> 
> With *both* cards installed, both U-Boot and my kernel see the Realtek-
> based card correctly, but the NETGEAR card has a corrupted Vendor ID
> (e.g. 0x1000 or 0x1003 instead of the correct 0x100b).  This happens
> regardless of which PCI slots I use for the cards (I've tried virtually
> every combination).  This smells of a power problem or something to me.
> 
> And again, even with either card alone, the drivers have serious
> problems talking to the cards.  I get various error messages from
> the drivers and I see badly mangled packets on the wire.  It's also
> not uncommon for the whole system to freeze...
> 
> Has anyone else seen similar behavior?
> 
> Has anyone had success with PCI on this board (under any kernel
> version)?
> 
> 
> Any ideas / data points are appreciated.
> 
> 
> Thanks!!!
> 
> Walt Wimer
> 
> 
> 
> 
>>This patch adds PCI bridge support for MPC8272 and PQ2FADS to the
>>current linuxppc-2.4 tree. Actually it has been tested with 8272, but
>>PQ2 _should_ also work, though it will complain that host bridge ID is
>>unrecognized.
>>
>>Signed-off-by: Vitaly Bordug <vbordug at ru.mvista.com>
>>
>>--
>>Sincerely, Vitaly
>>
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