Re: [Xenomai-core] [Xenomai-help] IXXAT-PCI-CAN driver hijacks my pci board

[Wolfgang Grandegger <wg@domain.hid>]

Hi Philippe,

Philippe Gerum wrote:
> It looks like this patch is still pending an ack/nak. Wolfgang, any
> comment on this? TIA,

FIFO overrun, sorry.

> On Tue, 2009-05-05 at 21:04 +0200, Stefan Kisdaroczi wrote:
>> Hi,
>>
>> my pci board has the same pci-interface-chip as the IXXAT-PCI board.
>> The vendor and device id's are identical, but the subsys id is different.
>>
>> The documentation for my board says that it is essential to check all ID values,
>> because vendor and device id are standard values for the pci-interface-chip.
>>
>> dmesg output, there is no IXXAT-PCI-CAN board installed:
>>> RT-Socket-CAN 0.90.2 - (C) 2006 RT-Socket-CAN Development Team
>>> RTCAN SJA1000 driver initialized
>>> PCI: setting IRQ 12 as level-triggered
>>> IXXAT-PCI-CAN 0000:00:11.0: found PCI INT A -> IRQ 12
>>> IXXAT-PCI-CAN: Initializing device 10b5:9050:2503

OK, it finding a variant of the PLX9050, but it will not use the device  
because of the following lines after the above printout:

    if (sub_sys_id != IXXAT_PCI_SUB_SYS_ID)
             return -ENODEV;
                
But ...

>> The following patch fixed it for me (my own driver loads again).

... obviously it does  not probe again.

>> However, i could not check if it still detects the CAN board,
>> as i dont have one.




>>
>> Thanks
>> kisda
>>
>> --- xenomai-2.4.7.orig/ksrc/drivers/can/sja1000/rtcan_ixxat_pci.c
>> +++ xenomai-2.4.7/ksrc/drivers/can/sja1000/rtcan_ixxat_pci.c
>> @@ -73,7 +73,7 @@
>>  #define IXXAT_BASE_PORT_SIZE 0x0400
>>
>>  static struct pci_device_id ixxat_pci_tbl[] = {
>> -	{IXXAT_PCI_VENDOR_ID, IXXAT_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
>> +	{IXXAT_PCI_VENDOR_ID, IXXAT_PCI_DEVICE_ID, IXXAT_PCI_VENDOR_ID, IXXAT_PCI_SUB_SYS_ID, 0, 0, 0},
>>  	{ }
>>  };
>>  MODULE_DEVICE_TABLE (pci, ixxat_pci_tbl);

I don't have a IXXAT CAN card to check if the sub-vendor id is really
IXXAT_PCI_VENDOR_ID. Does 

  {IXXAT_PCI_VENDOR_ID, IXXAT_PCI_DEVICE_ID, PCI_ANY_ID, IXXAT_PCI_SUB_SYS_ID, 0, 0, 0},

work as well? A work-around would be to disable the IXXAT-PCI driver in the kernel config.

Wolfgang.