From: Ted Unangst (teduzeitbombe.org)
Date: Wed Sep 01 2004 - 22:33:46 CDT

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On Wed, 1 Sep 2004, Christopher Keeley wrote:

> I am familiar with creating 'pseudo-device' driver(s) but would
> like to write something hardware specific.
>
> Am I correct in the knowledge that:
>
> a) in order for the kernel to
> execute the appropriate driver functions for a given block device driver,
> say, 'ide hard disk', it is necessary to create an instance of
> the 'cfattach' structure?
>
> b) I then proceed to add the relevant functions for the driver
> e.g attach, probe et al to the pointer(s) to function(s)
> in the 'cfattach' structure?.
>
> c) I need to create and initialise a 'cfdriver' structure?

so far, i think this is all good and needed.

> I realise there are other thing to do, but I would like to know if
> these are the necessary steps in order for the kernel to run the relevant
> 'attach' and 'probe' functions etc for a block device driver?

make sure it's in config. if you are creating a real block device, that
lives under /dev/, you need to add it to arch/conf.c bdevsw. also, create
a char device, i don't think block only devices will work.

--
ask not what you can do for your country
ask what your country did to you

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