[linux-audio-user] audiophile 2496 - spdif in

[wes schreiner]

Rick Taylor wrote:

>"wes schreiner" <wes at infosink.com> wrote:
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>>Clemens Ladisch wrote:
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>>>>wes schreiner wrote:
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>>>>The support for using lspci/setpci is in all 2.4.x kernels I think, but
>>>>it doesn't always do what you want. I have a Zoran 36057 video capture
>>>>device sitting on IRQ 10, same as my sound card. IRQ 9 is unused (no
>>>>ACPI), so I just tried "setpci -v -s 03:09.0 INTERRUPT_LINE=09" to
>>>>change its IRQ. lspci -v still says it is at IRQ 10, but lspci -b -v
>>>>says it is at IRQ 9. Which is it? OK, I modprobe zr36067 and the module
>>>>loads, and now both lspci -v and lspci -v -b agree that the Zoran chip
>>>>is at IRQ 10, so nothing changed.
>>>>        
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>>>The interrupt_line register doesn't affect the card in any way, it's
>>>there for information purposes only. The BIOS sets this register so
>>>that drivers know which interrupt to use.
>>>
>>>To change the interrupt routing, you have to reprogram some registers
>>>of the PCI controller (starting at 60h in Intel's ICHx southbridges
>>>IIRC, but read Intel's datasheet first). And I don't know if the
>>>kernel is able to realize that the interrupt has changed.
>>>
>>>HTH
>>>Clemens
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>>>
>>Well there we go, so it's back to juggling cards in PCI slots and 
>>switching motherboards. I can report that irqtune does indeed change the 
>>interrupt priority though, using kernel 2.4.21. That might help someone.
>>
>>wes
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>http://www.rt.com/man/setserial.8.html
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      "It  is  important  to note that setserial merely tells the
       Linux kernel where it should expect to find the  I/O  port
       and  IRQ lines of a particular serial port.  It does *not*
       configure the hardware, the actual serial board, to use  a
       particular  I/O  port."


>http://www.scyld.com/diag/
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Only mentions changing ISA network card interrupts.

>http://www.opsycon.com/PMON2000/OnlineManual/CmdRef/cmd_pcfg.htm
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Does the same job as setpci. Includes an interactive mode.