how to assign IRQ for devices..

[Chan Kim]

Hi,

In our system, I assigned Ethernet, SD card and USB interrupts to sparc processor's IRQ pin 7, 10 and 8 at my choice.
As far as the interrupt is concerned, they worked fine so far.
But I found in arch/sparc/kernel/head_32.S that some H/W interrupts have their supposed IRQ pins.

t_irq1: TRAP_ENTRY_INTERRUPT(1)             /* IRQ Software/SBUS Level 1     */
t_irq2: TRAP_ENTRY_INTERRUPT(2)             /* IRQ SBUS Level 2              */
t_irq3: TRAP_ENTRY_INTERRUPT(3)             /* IRQ SCSI/DMA/SBUS Level 3     */
t_irq4: TRAP_ENTRY_INTERRUPT(4)             /* IRQ Software Level 4          */
t_irq5: TRAP_ENTRY_INTERRUPT(5)             /* IRQ SBUS/Ethernet Level 5     */
t_irq6: TRAP_ENTRY_INTERRUPT(6)             /* IRQ Software Level 6          */
t_irq7: TRAP_ENTRY_INTERRUPT(7)             /* IRQ Video/SBUS Level 5        */
t_irq8: TRAP_ENTRY_INTERRUPT(8)             /* IRQ SBUS Level 6              */
t_irq9: TRAP_ENTRY_INTERRUPT(9)             /* IRQ SBUS Level 7              */
t_irq10:TRAP_ENTRY_INTERRUPT(10)            /* IRQ Timer #1 (one we use)     */
t_irq11:TRAP_ENTRY_INTERRUPT(11)            /* IRQ Floppy Intr.              */
t_irq12:TRAP_ENTRY_INTERRUPT(12)            /* IRQ Zilog serial chip         */
t_irq13:TRAP_ENTRY_INTERRUPT(13)            /* IRQ Audio Intr.               */
t_irq14:TRAP_ENTRY_INTERRUPT(14)            /* IRQ Timer #2                  */
Connecting external interrupt to one of processor's IRQ pin is my job so I did it, but I explicitly assigned the IRQ number (at my choice) in the
platform device resource structure and passed it to request_irq() during the driver initialization. This way I could use whatever number .
Is this what people usually do? (besides, above code doesn't have USB or SD card anyway) or do I have to change Ethernet IRQ to 5 as above?
If so, what about SD or USB?

Thanks.
regards,
Chan


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