> -----Original Message----- > From: Leon Woestenberg [mailto:leon.woestenb...@gmail.com] > Sent: Thursday, April 07, 2011 10:50 PM > To: linuxppc-...@ozlabs.org > Cc: Kumar Gala; Mahajan Vivek-B08308; Aggrwal Poonam-B10812; Felix > Radensky; Kushwaha Prabhakar-B32579 > Subject: Re: Problem with mini-PCI-E slot on P2020RDB > > Hello, > > On Thu, Dec 17, 2009 at 9:28 PM, Felix Radensky <fe...@embedded-sol.com> > wrote: > > Kumar Gala wrote: > >> On Dec 17, 2009, at 2:59 AM, Mahajan Vivek-B08308 wrote: > >>>> Thanks a lot. If I understand you correctly, the only way I can get > >>>> ath9k driver to work on this board using legacy interrupts is to > >>>> wait for a hardware fix. Right ? > >>>> > >>> Correct > >> > >> I'm confused. What's the issue with IRQ0 on the P2020RDB? Is it > >> used for another purpose? > > > > There's a problem with IRQ0 with respect to mini-PCI-E slot. I have > > Atheros wireless card plugged into it. ath9k wireless driver for this > > card uses legacy PCI-E interrupts, and I get "irq 16: nobody cared" > > message when driver executes request_irq(). Vivek has come to a > > conclusion that the problem is related to incorrect IRQ0 routing for > > mini-PCI-E slot on P2020RDB. > > > > I would like to understand this issue better, as I seem to be running > into something similar, and it puts my board design on hold. > > Can someone (from Freescale) explain what happens if a PCI Express end > point on the mini-PCIe slot raises a legacy interrupt, and where this > goes wrong? > > From what document or source code file can I conclude that the PCIe > legacy interrupt is shared with IRQ0? > > > I found this: > > P1020E/P2020E RDB System Errata, Last Update: 2/15/2010: > Problem:IRQ0 held low > Fix: Add 4.7K pull-up (to 3.3.V) for RTC_INT_N. > See R420 in Rev D schematic. > Add 4.7K pull-up (to 3.3.V) for MCU_INT_N. > See R423 in Rev D schematic. > >
Hello Leon, Yes you are right, PCIe leagacy interrupt is shared with IRQ0. For Atheros issue. Can you please try followings, Meanwhile I will try to dig into it. http://old.nabble.com/Problem-with-mini-PCI-E-slot-on-P2020RDB-td26802038.html Regarding sata_sil24, Please see my e-mail on Linux-ide for correct IDSEL value. Please first try IDSEL value mentioned in email on Linux-ide. Then try this URL.. --Prabhakar _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev