Klaas Gadeyne wrote: > Hi, > > we're having a problem finding a non-shared IRQ for a PEAK systems can > board in a particular industrial SBC with PCI backplane [*]. > Loading the xeno_can_peak_pci driver fails due to a "so-called" IRQ > conflict. (see below) > > However, it seems the IRQ (12) is not assigned, so this shouldn't be a > problem [**]? > > zeus:~# uname -a > Linux zeus 2.6.24-ipipe-2.0-03 #1 PREEMPT Tue Mar 4 14:54:02 CET 2008 > i686 GNU/Linux > zeus:~# cat /proc/interrupts > CPU0 > 0: 527508 XT-PIC-XT timer > 1: 301 XT-PIC-XT i8042 > 2: 0 XT-PIC-XT cascade > 10: 770 XT-PIC-XT eth0 > 11: 4386 XT-PIC-XT libata > 14: 4333 XT-PIC-XT ide0 > 15: 0 XT-PIC-XT libata > NMI: 0 Non-maskable interrupts > TRM: 0 Thermal event interrupts > SPU: 0 Spurious interrupts > ERR: 0 > zeus:~# modprobe xeno_can_peak_pci > zeus:~# dmesg | tail > rtcan: registered rtcan0 > PEAK-PCI-CAN: base_addr=f8a62400 conf_addr=f88b0000 irq=12 > IRQ = 12 > ERROR -16: IRQ 12 is busy, check shared interrupt support! > ERROR -16 while trying to register SJA1000 device! > Removing PEAK-PCI SJA1000 device rtcan0 > Unregistering SJA1000 device rtcan0 > RTCAN: unregistered rtcan0 > PEAK-PCI-CAN: probe of 0000:04:06.0 failed with error -16 > zeus:~# lspci -vv | tail > Capabilities: [b0] Slot ID: 0 slots, First-, chassis 00 > > 04:06.0 Network controller: Unknown device 001c:0001 (rev 02) > Subsystem: Unknown device 001c:0004 > Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- > ParErr- Stepping- SERR- FastB2B- > Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium > >TAbort- <TAbort- <MAbort- >SERR- <PERR- > Interrupt: pin A routed to IRQ 12 > Region 0: Memory at d0100000 (32-bit, non-prefetchable) > [size=64K] > Region 1: Memory at d0110000 (32-bit, non-prefetchable) > [size=64K] > > > Any hints on how to debug this? We've already tried everything > described in the FAQ (I guess), but we don't understand there's a > conflict even if nothing is listed in /proc/interrupts?
There are two CAN controllers on the card, right? Therefore you need support for shared interrupts. Actually, requesting the IRQ 12 for the second CAN controller fails because it's already used by the first one. Wolfgang- _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
