PCI-Interrupts with QSpan an Winbond on MBX860

PCI-Interrupts with QSpan an Winbond on MBX860

[Stephan Ruettiger (r0337c)]

I have a PCI card on a MBX860 that works fine. I can access the io space
through a module, the card generates interrupts but I'm not able to get
the interrupt handler working. This is because the QSpan and the Winbond
doesn't pass interrupts.

I guess that some registers are incorrect (EPPCbug?). Could someone tell
me in which place of the kernel the settings should be done.

The kernel is 2.2.13 with some patches.

some logs:
#cat /proc/interrupts
           CPU0
  5:       3231   8xx SIU       cpm
 15:          0   8xx SIU       tbint
BAD:          0
# cat /proc/pci
cat uses obsolete /proc/pci interface
PCI devices found:
  Bus  0, device   3, function  0:
    ISA bridge: Winbond W83C553 (rev 5).
      Medium devsel.  Master Capable.  No bursts.
  Bus  0, device   3, function  1:
    IDE interface: Winbond SL82C105 (rev 5).
      Medium devsel.  Fast back-to-back capable.  IRQ 14.  Master
Capable.  No b
ursts.  Min Gnt=2.Max Lat=40.
      I/O at 0x1f0 [0x1f1].
      I/O at 0x3f4 [0x3f5].
      I/O at 0x170 [0x171].
      I/O at 0x374 [0x375].
      I/O at 0x1000420 [0x1000421].
      I/O at 0x1000430 [0x1000431].
  Bus  0, device   7, function  0:
    Non-VGA device: Motorola Unknown device (rev 0).
      Vendor id=1057. Device id=5804.
      Medium devsel.  Fast back-to-back capable.  IRQ 10.  Master
Capable.  No b
ursts.
      I/O at 0x1000000 [0x1000001].
      I/O at 0x1000100 [0x1000101].
      I/O at 0x1000200 [0x1000201].
      I/O at 0x1000300 [0x1000301].


--

Regards,
     Stephan

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: PCI-Interrupts with QSpan an Winbond on MBX860

[Jamie Guinan]

Stephan,

Look at arch/ppc/kernel/m8xx_setup.c, in the function
m8xx_init_IRQ(), you'll find the for loop for initializing
the 8259 commented out with "#if 0".  I uncommented it and
I now get,

# cat /proc/interrupts
           CPU0
  5:       1296   8xx SIU       cpm
  6:         70   8xx SIU       8259 cascade
 15:          0   8xx SIU       tbint
 30:         70   i8259         ide0
BAD:          0

-Jamie


On Mon, 3 Jul 2000, Stephan Ruettiger (r0337c) wrote:

>
> I have a PCI card on a MBX860 that works fine. I can access the io space
> through a module, the card generates interrupts but I'm not able to get
> the interrupt handler working. This is because the QSpan and the Winbond
> doesn't pass interrupts.
>
> I guess that some registers are incorrect (EPPCbug?). Could someone tell
> me in which place of the kernel the settings should be done.
>
> The kernel is 2.2.13 with some patches.
>
> some logs:
> #cat /proc/interrupts
>            CPU0
>   5:       3231   8xx SIU       cpm
>  15:          0   8xx SIU       tbint
> BAD:          0
> # cat /proc/pci
> cat uses obsolete /proc/pci interface
> PCI devices found:
>   Bus  0, device   3, function  0:
>     ISA bridge: Winbond W83C553 (rev 5).
>       Medium devsel.  Master Capable.  No bursts.
>   Bus  0, device   3, function  1:
>     IDE interface: Winbond SL82C105 (rev 5).
>       Medium devsel.  Fast back-to-back capable.  IRQ 14.  Master
> Capable.  No b
> ursts.  Min Gnt=2.Max Lat=40.
>       I/O at 0x1f0 [0x1f1].
>       I/O at 0x3f4 [0x3f5].
>       I/O at 0x170 [0x171].
>       I/O at 0x374 [0x375].
>       I/O at 0x1000420 [0x1000421].
>       I/O at 0x1000430 [0x1000431].
>   Bus  0, device   7, function  0:
>     Non-VGA device: Motorola Unknown device (rev 0).
>       Vendor id=1057. Device id=5804.
>       Medium devsel.  Fast back-to-back capable.  IRQ 10.  Master
> Capable.  No b
> ursts.
>       I/O at 0x1000000 [0x1000001].
>       I/O at 0x1000100 [0x1000101].
>       I/O at 0x1000200 [0x1000201].
>       I/O at 0x1000300 [0x1000301].
>
>
> --
>
> Regards,
>      Stephan
>
>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/