From: Johan Borkhuis <j.borkhuis@dutchspace•nl>
To: Konstantin Boyanov <kkboyanov@gmail•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: Driver for device behind a PCI-VME bridge
Date: Mon, 20 Aug 2007 10:45:30 +0200 [thread overview]
Message-ID: <46C954AA.7050609@dutchspace.nl> (raw)
In-Reply-To: <929bf310708200140w6efc57f6k81a1339845059e2d@mail.gmail.com>
Hello Konstantin,
Konstantin Boyanov wrote:
> Hi list,
>
> I'm currently reading the LDD 3rd Edition and trying to create a
> device driver for a custom device located on VME bus. I have already
> linux 2.6.15 running on the master board, as well as the device driver
> for the PCI-VME bridge. The main problem I have is understanding how
> to "attach" my driver for the custom device to the bridge device driver.
> The bridge device driver is implemented as a class, i.e. doesn't
> define a new bus type. Should I define a new class for my driver, or
> should I connect it somehow to the existing one (maybe by something as
> "subclass")?
> All I want to do is to redirect I/O reads and writes to the VME bus,
> but I got no clue as to how to use the existing VME bridge driver for
> this purpose. After I get through this I think all other things (VME
> interrupt registration & handling, etc.) will be straightforward.
> The LDD 3rd book states that defining a new bus type is the last thing
> one would like to do, instead defining a class is far better approach.
> Why is that?
>
> Any recommendations and sharing of practical experience are highly
> appreciated.
I am also working on a VME-board. What I did was use mmap to map
specific parts of the VME-memory into user space.
BTW: what kind of board and Linux-flavor are you using?
Kind regards,
Johan Borkhuis
next prev parent reply other threads:[~2007-08-20 8:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-20 8:40 Driver for device behind a PCI-VME bridge Konstantin Boyanov
2007-08-20 8:45 ` Johan Borkhuis [this message]
2007-08-20 8:58 ` Konstantin Boyanov
[not found] ` <929bf310708210055k3970c3chfc097ff776af439a@mail.gmail.com>
2007-08-21 7:56 ` Konstantin Boyanov
2007-08-21 8:32 ` Johan Borkhuis
2007-08-21 9:49 ` Konstantin Boyanov
[not found] ` <46CAE973.6040306@dutchspace.nl>
2007-08-23 7:47 ` Konstantin Boyanov
2007-08-23 8:24 ` Johan Borkhuis
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