Device Drivers For Different IO Bus architectures

Hello Folks
I am trying to find out some details about writing device drivers .
If a device is capable of talking to different IO buses like PCI /
ISA / PCI express etc .
Is writing a driver to it on a unix / linux system be different If so
in what way .

To elaborate the question more let us say a particular device could
have different firmware on so it can talk to to CPU over different IO
Bus as required and if the interface to the layer2 / firm ware is kept
as same as possible , would the driver writing be any different .

Basically i am trying to find out if writing device drivers is
different based on the IO bus used.
I believe it should not be so , but i would like to here from the
experts there .

thanks
subra

.

Relevant Pages

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