440SPe/Katmai PCIe problems

[Pravin Bathija]

> -----Original Message-----
> From: Benjamin Herrenschmidt [mailto:benh at kernel.crashing.org]
> Sent: Tuesday, May 11, 2010 8:03 PM
> To: Stefan Roese
> Cc: linuxppc-dev; Pravin Bathija
> Subject: Re: 440SPe/Katmai PCIe problems
> 
> On Wed, 2010-05-12 at 12:40 +1000, Benjamin Herrenschmidt wrote:
> > Hi Stefan !
> >
> > (Or somebody from AMCC)
> >
> > I noticed we still have this old problem on PCIe where some cards
> don't
> > seem to work. The link trains but they don't respond on config space.
> > This is the case for example of that Sunix quad USB card. It seems to
> be
> > related to the kind of TI PCIe <-> PCI bridge on these though.
> >
> > Have anybody tracked down the root cause of the problem ? Some say
> that
> > it could be that the bridge doesn't cope with the double reset (uboot
> > then kernel). Would it be possible to tell uboot to avoid touching
> the
> > PCIe interface completely so the kernel is the first one to get in ?
> 
> Actually... the card works in the Canyonlands using the latest u-boot
> from ftp.denx.de (u-boot-nand.bin-2009.11.1), though interestingly
> enough, this u-boot fails to detect an XGI Z11 video card that I have,
> whichever slot I put it in.
> 
> in fact, the kernel itself detects the card and times out trying to get
> a link. It works with whatever u-boot I used to have in there (and no
> longer do ... oops :-)
> 
> Cheers,
> Ben.
> 


Ben,

Thanks for bringing this to our attention. We'll research this issue.

Regards,
Pravin