Driver for device behind a PCI-VME bridge
j.borkhuis at dutchspace.nl
Mon Aug 20 18:45:30 EST 2007
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
> 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
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?
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