Re: Linux running on a PCI Option device?

[Greg Ungerer <gerg@snapgear.com>]

Hi Jon,

Jon Ringle wrote:
> On Thursday 09 February 2006 01:43 am, Greg Ungerer wrote:
>>Jon Ringle wrote:
>>>I am working on a new board that will have Linux running on an xscale
>>>processor. This board will be a PCI Option device. I currently have a
>>>IXDP465 eval board which has a PCI Option connector that I will use for
>>>prototyping. From what I can tell so far, Linux wants to scan the PCI bus
>>>for devices as if it is the PCI host. Is there any provision in Linux so
>>>that it can take on the role of a PCI option rather than a PCI host?
>>
>>Have a look at the code in arch/arm/mach-ixp4xx/common-pci.c, in
>>the function ixp4xx_pci_preinit().
>>
>>It does a check on whether the PCI bus is configured as HOST or not.
>>I don't know if that code support is enough for it all to work right
>>though (I certainly haven't tried it on either the 425 or 465...)
> 
> 
> Something that I don't quite understand is how I'm supposed to make vendor Id 
> information available to the PCI host. Any ideas there?

No, sorry, no idea. I haven't looked at it in that much detail.

Regards
Greg



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