Re: [Xenomai-help] xeno_16550A and multiple channels

[Jan Kiszka <jan.kiszka@domain.hid>]

Anders Blomdell wrote:
> With a PCI multiport I/O-card, configured with:
> 
>   modprobe xeno_16550A.ko io=0xd400,0xd080 irq=5,5
> 
> I can't get cross-link to work. This is what I get:
> 
>   main : write-file opened
>   main : write-config written
>   main : can't open rtser1 (read), Device or resource busy
>   main : rtser0 (write) -> closed
> 
> The reason is that the second call (xeno_16550A.c) to:
> 
>   err = rtdm_irq_request(&ctx->irq_handle, irq[dev_id],
> 			 rt_16550_interrupt,
> 			 RTDM_IRQTYPE_SHARED | RTDM_IRQTYPE_EDGE,
> 			 context->device->proc_name, ctx);
> 
> returns -16.
> 
> This somehow makes sense since rtser0 and rtser1 uses the same interrupt, but
> having multiple channels sharing the same interrupt seems to be a valid usecase
> according to http://www.xenomai.org/index.php/16550A.
> 
> Kernel version is 2.6.24.3 and Xenomai version is 2.4.2.
> 
> Any ideas of what might be wrong?

CONFIG_XENO_OPT_SHIRQ?

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux