Re: Address mapping for pci driver

[Bernhard Walle <bernhard.walle@xxxxxx>]

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Hello,

"Thanh Tran" <ttran@xxxxxxxxxxxxx> [2006-08-01]:
> I am writing a pci device driver in linux to talk to a modem module.  My
> driver code has detected the modem module using 
>  
>          pci_find_device() 
>          startAddr = pci_resource_start(pciDev,i);
>          flags     = pci_resource_flags(pciDev,i);

I think the functions you're using are obsolete. I use

 - pci_enable_device()
 - pci_request_regions()
 - pci_iomap()

> Now that I have the starting physical address of the pci device, do I
> have to use ioremap() on this physical address in order to talk to the
> device (in kernel space) ?  Can I talk the device using the detected
> physical address directly?

I think no because the physical addresses have to be mapped by the MMU
to be accessible in logical address space.


Regards,
  Bernhard
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