Re: [linuxsh-dev] problems with PCI on SH7751 board

[Paul v. G. <pau...@ri...>]

Finally some success! ;-)

In arch/sh/kernel/pci-sh7751.c, in pcibios_init, the call to
pci_assign_unassigned_resources() is commented out (linux 2.4). It still
seems to be commented out in the CVS repository. Anybody know why?

After uncommenting it, rebuilding, reburning the flash and rebooting,
/proc/pci now shows:

  Bus  0, device   3, function  0:
    Network controller: Harris Semiconductor Prism 2.5 Wavelan chipset (rev 1).
      Master Capable.  Latency=32.  
      Prefetchable 32 bit memory at 0xfd100000 [0xfd100fff].

A decent address.

And I can successfully start the interface on the WiFi card.

Thanks.

Paul

On Tue, Jun 17, 2003 at 03:46:00PM -0700, Paul van Gool wrote:
> On Tue, Jun 17, 2003 at 11:08:26PM +0100, David Woodhouse wrote:
> > OK, the resources it's allocating there are completely bogus as far as I
> > can tell. Can you double-check the values of PCIBIOS_MIN_MEM and
> > PCIBIOS_MIN_IO as seen in drivers/pci/setup-res.c::pci_assign_resource()
> I added a printk statement in pci_assign_resource. The output is:
> 
> pvg PCIBIOS_MIN_IO = 10000
> pvg PCIBIOS_MIN_MEM = fd000000
> pvg PCIBIOS_MIN_IO = 10000
> pvg PCIBIOS_MIN_MEM = fd000000
> 
> BTW this routine seems to be called after the resources have already been
> assigned.
> 
> It seems to be getting the values from include/asm-sh/pci.h:
> 
> #elif defined(CONFIG_SH_7751_SOLUTION_ENGINE)
> // #define PCIBIOS_MIN_IO          0x4000
> #define PCIBIOS_MIN_IO          0x10000
> #define PCIBIOS_MIN_MEM         0xFD000000
> #endif
> 
> > Make it stop assigning resources which your board I/O code doesn't think
> > are PCI, and you'll be most of the way there :)
> Sounds like a good idea... I'll start debugging the kernel a bit to see
> what data it's working with.
> 
> Thanks.
> 
> Paul
> -- 
> Paul van Gool                                               Rincon Networks
> pau...@ri...                              (805)-705-1442
> 
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-- 
Paul van Gool                                               Rincon Networks
pau...@ri...                              (805)-705-1442