MPC83xx ipic problem

[André Schwarz]

Scott,

thanks for your reply.

Honestly I don't think the board wiring is incorrect.
FPGA goes to IRQ0 and miniPCI is wired to IRQ1.

Maybe there's a crosstalk problem since the pull-up resistors are 
packaged inside an array ... I'll check this.


regards,
André


Scott Wood schrieb:
> André Schwarz wrote:
>> There are two external PCI devices connected (FPGA + miniPCI socket).
>> The FPGA is working fine and uses IRQ0 for its PCI_INTA line.
>>
>> As soon there's a miniPCI module present and the driver loaded 
>> (actually an ath5k WiFi module) the system complains after a while :
>>
>> irq 48: nobody cared
>> handlers: .... location of the FPGA irq handler
>> Disabling IRQ #48
>>
>> -> This is weird since the FPGA isn't working at all and IRQ0 is *not* 
>> asserted !
> 
> Are you *sure* that IRQ0 isn't asserted?  The IPIC seems to think it is.
> 
>> Of course the miniPCI irq is routed to a different pin on the CPU (IRQ1).
> 
> Perhaps the board wiring is incorrect?
> 
>> interrupt-map = <0x5800 0 0 1 &ipic 0x30 0x8      -> FPGA @ IRQ0
>>                  0x6000 0 0 1 &ipic 0x11 0x8      -> miniPCI INTA @ IRQ1
>>                  0x6000 0 0 2 &ipic 0x11 0x8>;    -> miniPCI INTB @ IRQ1
>>
>> Is it legal to use a single irq pin twice ?
> 
> Yes.
> 
> -Scott
> 
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