Problem with mini-PCI-E slot on P2020RDB

[Mahajan Vivek-B08308]

> From: Felix Radensky [mailto:felix at embedded-sol.com] 
> Sent: Wednesday, December 16, 2009 2:56 PM
> To: Mahajan Vivek-B08308
> Cc: linuxppc-dev at ozlabs.org; Aggrwal Poonam-B10812; Kumar Gala
> Subject: Re: Problem with mini-PCI-E slot on P2020RDB
> 
> Hi,
> >
> > Looks like INTA is not being routed to IRQ0 properly for this PCIe 
> > ctlr. Try changing the interrupt-map prop for the ctlr at 
> 0xffe0a000 
> > to the following, temporarily:-
> >
> > interrupt-map = <
> > /* IDSEL 0x0 */
> > 0000 0x0 0x0 0x1 &mpic 0x1 0x1
> > 0000 0x0 0x0 0x2 &mpic 0x2 0x1
> > 0000 0x0 0x0 0x3 &mpic 0x3 0x1
> > 0000 0x0 0x0 0x4 &mpic 0x0 0x1
> >   
> 
> Thanks for your help. With this change "nobody cared" message 
> disappears, but interrupts are not coming at all.
> 
> Is it a SoC problem or a board problem ?

As per the p2020rm, PCIe legacy INTA is shared with IRQ0 for 
this ctlr, which is the exactly the case with other SoC's 
p2020ds, mpc8536ds, mpc8572ds. To me it seems like a board 
issue and it needs to be followed up.

I plugged in ralink rt2860 pcie wirless card in the mini-pcie 
slot of p2020rdb, which ran fine becaused it used MSI by default.
How hard is it to enable MSI in the atheros wireless driver.

> 
> Thanks.
> 
> Felix.
> 

Thanks,
Vivek