EPIA PCI slot
Eric W. Biederman
ebiederman at lnxi.com
Fri Jun 13 13:22:00 CEST 2003
"Brian G. Rhodes" <bgr at gw.linespeed.net> writes:
> The reason I was not getting interrupts on devices in the pci slot on the
> EPIA is because they were not set to be bus masters, so they would never
> generate interrupts. A quick write to the command register fixed the
> problem. Command register is being set to 0x02. It should be set to
> 0x06. a 6 to 4.
Actually this is an interesting symptom. Being a Bus Master means you
can initiate transactions on the PCI bus i.e. DMA. There is no requirement
that I know of that the bus master bit applies to IRQ's. Those are out
of band signals.
Eric
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