Re: How to reset pci device

Re: How to reset pci device

[Robert Hancock]

earthquake.de@freenet.de wrote:
> Hi,
> i have the following problem:
> A Pci-device is not set up correctly, (this is caused by the producer
> of the pci device
> and can not be changed).
> But for test purposes i read the confi space from the pci device( just
> the BARs)
> reset the pci device manually.
> After this reset i write the read confi space back (just the BARs and
> command register).

If you mean issuing a reset to that specific device, there is no 
portable way to do this, if there is any way at all. In most cases it's 
likely impossible to reset just one device on the PCI bus.

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/

Re: How to reset pci device

[Krzysztof Halasa]

Robert Hancock <hancockr@shaw.ca> writes:

> If you mean issuing a reset to that specific device, there is no
> portable way to do this, if there is any way at all. In most cases
> it's likely impossible to reset just one device on the PCI bus.

It's different if you're writing a driver for such device - it doesn't
have to be "portable", and many (all?) PCI glue chips can be reset (and
can reset the rest of stuff on the card) by writing to a special (bit)
register.
-- 
Krzysztof Halasa