> The following applies to 2.1, 2.0 is basically similar, but the syntax
> differs somewhat.
>
> 1) check for PCI: pci_present ()
> 2) find your device: struct pci_dev* pdev = pci_find_device (VENDOR_ID, DEV_ID, pdev)
> Now you have access to the PCI config space of the device.
> Use the info provided in it, especially:
> 3) get IRQ, IOSpace and MemRegions from the PCI config space
> 3a) enable busmastering (DMA), if necessary: pci_set_master (pdev)
> 4) register iospace: check_region (addr, ln); request_region (addr, ln, "NAME")
You have forgotten one step for memory-mapped I/O; you have to use
ioremap() to get access to the device registers... Note that it was
called vremap in 2.0.xx. See Documentation/IO-mapping.txt for more
details.
Gabriel.
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