Nathan Meyers (nmeyers@javalinux.net)
Mon, 07 Feb 2000 17:53:11 -0800
Richard Stover wrote:
>
> I'm using a SIIG Inc. Cyberparallel Dual parallel port card in
> a special laboratory application. I'm writing a special device driver
> for Linux (2.2.12-20, Redhat 6.1). The card seems to be working OK.
This may be a long shot, but is the interrupt shared by other devices?
That's a common configuration with PCI devices, but not all drivers can
deal with it. If that's the case, you can assign a PCI device its own
IRQ with the /sbin/setpci command.
Nathan Meyers
nmeyers@javalinux.net
> I've done programmed I/O in ECP mode. However, even though interrupts
> are enabled on the card and I see the service interrupt bit change
> from 0 to 1 at the correct time, indicating an interrupt should occur,
> in fact I never see any interrupt. I checked in the linux
> do_8259A_IRQ() routine but no interrupt is seen. The interrupt number
> and its handler do seem to be properly registered. They show up as
> expected in /proc/interrupts. The interrupt number agrees with the
> number reported at boot time by the BIOS.
>
> I'd sure like to find those missing interrupts.
> I would be happy to hear suggestions for things to check.
>
> Regards,
>
> Richard
>
> -
> Richard Stover email: richard@ucolick.org
> Detector Development Laboratory http://gardiner.ucolick.org/~ccdev
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This archive was generated by hypermail 2.0b3 on Mon 07 Feb 2000 - 20:56:16 EST