Re: PCMCIA support for 860 -- lost interrupt

Hello, Magnus

I found a temp hacker to fix it.
Socket Driver and ATA/IDE driver share the same IRQ 13.
So I must modify the arch/ppc/kernel/irq.c: request_8xxirq(),
it only allow pci-ide share the irq.
It will not complain "lost interrupt".

BRs,
Shuangjun

quoted

From the code ide_cs.c in pcmcia package, the m8xx_pcmcia interrupt
handler will call the ide_event() in ide_cs.c, this function does
nothing with ide interrupt handler in the kernel.

Here is Dan's ideas

quoted

See, this is why I changed the function name in the first place.
request_irq() assumes a PC-like interrupt structure, which doesn't work
on the MPC8xx internal interrupt controller.  You need to add an
indirect function call to the 'md' structure that will install the
IDE interrupt handler.  When you use the PCMCIA for ATA/IDE, you should
call a function that installs the PCMCIA interrupt vector.

In drivers/block/ide-probe.c,
init_irq() function has installed the IDE interrupt handler of IRQ 9 as
ide_intr()
In m8xx_pcmcia.c from the pcmcia package, Damm has installed the PCMCIA
interrupt
IRQ 13 as m8xx_interrupt(), so problem is:
without 8259 controller in FADS board, how the m8xx_interrupt() route the
interrupt
event to the ide_intr(). No hardware triger the IRQ 9, no call ide_intr(),
so the
kernel think "lost interrupt", I guess.

Here is the result:
bash# cat /proc/inter*
          CPU0
 5:       2394   8xx SIU       cpm
 9:          0   8xx SIU       ide0
13:          9   8xx SIU       m8xx_pcmcia
15:          0   8xx SIU       tbint
BAD:          0

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