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?
/Anders
--
Anders Blomdell Email: [EMAIL PROTECTED]
Department of Automatic Control
Lund University Phone: +46 46 222 4625
P.O. Box 118 Fax: +46 46 138118
SE-221 00 Lund, Sweden
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