Philippe, Indeed it was a problem with __set_irq_handler() not assigning appropriate handlers, since this board doesn't fall into any of the existing handler categories.
Thanks for your help. James On Wed, Sep 16, 2009 at 10:47 AM, Philippe Gerum <[email protected]> wrote: > On Tue, 2009-09-15 at 10:27 -0500, James Kilts wrote: > > I'm porting Xenomai/I-pipe to the NS921x (an arm9-based) platform, but > > I'm having problems getting the interrupts to re-enable after the > > first interrupt triggers. > > > > A kernel driver module is being used to test the interrupt latency > > using an input GPIO pin which triggers a dedicated external IRQ, to > > which the ISR responds by toggling a different GPIO pin. I realize > > that there are test applications which do very similar things, and > > that the RTDM skin is preferable over the native API. Still, I would > > like to understand why the interrupt is not being properly > > acknowledged and reset. > > > > If the ISR manually performs the ACK and EOI using platform specific > > calls, subsequent interrupts are handled properly. My understanding > > was that Xenomai should re-enable the interrupt for processing without > > such intervention. How do I force Xenomai to clear and re-enable the > > interrupt to handle subsequent interrupts? > > It looks like an I-pipe issue, not a Xenomai one. Xenomai asks the > I-pipe to re-enable the interrupt line via the ipipe_end() handler, and > for some reason, that handler does not seem to do the right thing on > your board. > > Which I-pipe patch are you using (kernel version and I-pipe release)? > > > > > Thanks, > > James > > > > > > > > static int __init turnaround_irq_measure_init(void) > > { > > .... > > > > retval = rt_intr_create(&irq_response_desc, > > "ns9xxx_measure_irq_rt_response", > > TURNAROUND_INPUT_IRQ, > > turnaround_irq_measure_response, > > NULL, NULL); > > > > if (retval == 0) // 0 is success > > { > > set_irq_type(TURNAROUND_INPUT_IRQ, IRQ_TYPE_EDGE_FALLING); > > retval = rt_intr_enable(&irq_response_desc); > > > > if (retval != 0) // 0 is success > > { > > console_print("Turnaround test driver rt interrupt enable: > > FAILED\n"); > > } > > } > > else > > { > > console_print("Turnaround test driver rt interrupt create: > > FAILED\n"); > > } > > > > return 0; > > } > > > > > > static int turnaround_irq_measure_response(struct xnintr *intr) > > { > > /* Set GPIO pin low */ > > gpio_set_value(TURNAROUND_OUTPUT_GPIO, 0); > > > > /* Wait 50 microseconds */ > > rt_timer_spin(50000); > > > > /* Set GPIO pin high */ > > gpio_set_value(TURNAROUND_OUTPUT_GPIO, 1); > > > > /* Start listening again */ > > /* NOTE: These two lines should not be necessary */ > > ns9xxx_ack_irq(TURNAROUND_INPUT_IRQ); > > ns9xxx_eoi_irq(TURNAROUND_INPUT_IRQ); > > > > return RT_INTR_HANDLED; > > } > > > > > > _______________________________________________ > > Xenomai-help mailing list > > [email protected] > > https://mail.gna.org/listinfo/xenomai-help > -- > Philippe. > > >
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