Re: PCI register questions..

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On Wed, Feb 05, 2003 at 11:39:27AM +0100, Jules Bjørn Colding wrote:
> Hi,
> 
> On Wed, 2003-02-05 at 10:04, Erik Mouw wrote:
> > Don't fiddle with the PCI config space like that. We have the function
> > pci_write_config_byte() and friends for that. If you use those
> > functions, your driver will be portable, so it will work without
> > changing a single line of code the minute you put it in a PowerPC
> > machine. Another advantage is that using the pci_*() functions make
> > your code much more readable.
> 
> I would love to do that, but I need a struct pci_dev before I can use
> pci_write_config_byte() and friends. To find a pci_dev (with
> pci_find_device() I think) I need a vendor and device id. My problem is
> that I don't have these. My device is a CR16MCS9 (see google) which has
> been bolted onto the PCI/ISA bridge. This device reports no vendor or
> device id to the system, well.. maybe it does, but then I can't find it.
> 
> I can therefore not see how I can get a pci_dev pointer and thought that
> my only solution was to write directly to the pci registers. Is there
> another way around this problem ?

Use the pci_write_config_*_nodev() functions in the 2.4 kernel, or the
pci_bus_write_config_*() fuctions in 2.5.  That should do what you need.

Good luck.

greg k-h
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