Hello Felix Please find some comments inline.
Regards Poonam > -----Original Message----- > From: Kushwaha Prabhakar-B32579 > Sent: Tuesday, April 12, 2011 9:26 AM > To: Aggrwal Poonam-B10812 > Subject: FW: Problem with mini-PCI-E slot on P2020RDB > > > > -----Original Message----- > From: Felix Radensky [mailto:fe...@embedded-sol.com] > Sent: Monday, April 11, 2011 7:16 PM > To: Kushwaha Prabhakar-B32579 > Cc: Fabian Bertholm; Leon Woestenberg; linuxppc-...@ozlabs.org; Mahajan > Vivek-B08308; Aggrwal Poonam-B10812; Gupta Maneesh-B18878 > Subject: Re: Problem with mini-PCI-E slot on P2020RDB > > Hi Prabhakar, > > On 04/11/2011 02:09 PM, Kushwaha Prabhakar-B32579 wrote: > > Hi, > > > > Yes. It wil be applicable for all revisions. > > > > Regards, > > Prabhakar > > > > I'm sure this is applicable to all revisions, but it doesn't necessarily > makes things work. The problem I've reported back in 2009 still exists on > P2020RDB revC, even if I use the latest u-boot and kernel and make device > tree changes that you've suggested. > I've attached the boot log. As such there is no hardware fix related to this issue between RevC to RevD. The solution was a software patch to resolve the issue related to IRQ0. > > On the other hand, on P1020RDB revD with the same kernel, ath9k driver > loads fine and interrupts are arriving. However this only works with u- > boot-2010.12. May be you can look at http://old.nabble.com/Problem-with-mini-PCI-E-slot-on-P2020RDB-td26802038.html Felix we do not have the atheros driver for 2.6.38 and the issue is only seen with Atheros not sata_sil. If possible can you send the driver code if possible so that we can try reproducing it. Regards Poonam > > > > >> -----Original Message----- > >> From: Felix Radensky [mailto:fe...@embedded-sol.com] > >> Sent: Monday, April 11, 2011 2:10 PM > >> To: Kushwaha Prabhakar-B32579 > >> Cc: Fabian Bertholm; Leon Woestenberg; linuxppc-...@ozlabs.org; > >> Mahajan Vivek-B08308; Aggrwal Poonam-B10812; Gupta Maneesh-B18878 > >> Subject: Re: Problem with mini-PCI-E slot on P2020RDB > >> > >> Hi, > >> > >> Assuming I have all patches in place, will this problem be resolved > >> on earlier board revisions (before rev D) ? > >> > >> Felix. > >> > >> On 04/11/2011 12:06 PM, Kushwaha Prabhakar-B32579 wrote: > >>> Hi Fabe, > >>> > >>> Yes .. P1020/P1011 RDB has same issue as of P2020RDB. > >>> > >>> It was because of some missing patches at u-boot and Linux. > >>> > >>> U-boot patch : It is already present in open source. Please use > >>> latest code base Linux patch : I am in process of posting in open > source. > >> Please make mentioned changes of IDSEL. > >>> --Prabhakar > >>> > >>>> -----Original Message----- > >>>> From: Fabian Bertholm [mailto:fabeisag...@googlemail.com] > >>>> Sent: Monday, April 11, 2011 1:53 PM > >>>> To: Kushwaha Prabhakar-B32579 > >>>> Cc: Leon Woestenberg; linuxppc-...@ozlabs.org; Mahajan > >>>> Vivek-B08308; Felix Radensky; Aggrwal Poonam-B10812; Gupta > >>>> Maneesh-B18878 > >>>> Subject: Re: Problem with mini-PCI-E slot on P2020RDB > >>>> > >>>> 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-td2 > >>>>> 68 > >>>>> 02 > >>>>> 038.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
