Hello Kushwaha Prabhakar, Our impression is that there is the same issue on the P1020/P1011 RDB. Can you confirm this?
Best Regards, Fabe 2011/4/8 Kushwaha Prabhakar-B32579 <b32...@freescale.com>: > > >> -----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 > _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
