Hi,

Yes. It wil be applicable for all revisions.=20

Regards,
Prabhakar

-----Original Message-----
From: Felix Radensky [mailto:felix@embedded-sol.com]
Sent: Monday, April 11, 2011 2:10 PM
To: Kushwaha Prabhakar-B32579
Cc: Fabian Bertholm; Leon Woestenberg; linuxppc-dev@ozlabs.org; Mahajan
Vivek-B08308; Aggrwal Poonam-B10812; Gupta Maneesh-B18878
Subject: Re: Problem with mini-PCI-E slot on P2020RDB
=20
Hi,
=20
Assuming I have all patches in place, will this problem be resolved on
earlier board revisions (before rev D) ?
=20
Felix.
=20
On 04/11/2011 12:06 PM, Kushwaha Prabhakar-B32579 wrote:

quoted

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.

quoted

--Prabhakar

quoted

-----Original Message-----
From: Fabian Bertholm [mailto:fabeisageek@googlemail.com]
Sent: Monday, April 11, 2011 1:53 PM
To: Kushwaha Prabhakar-B32579
Cc: Leon Woestenberg; linuxppc-dev@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[off-list ref]:

quoted

quoted

-----Original Message-----
From: Leon Woestenberg [mailto:leon.woestenberg@gmail.com]
Sent: Thursday, April 07, 2011 10:50 PM
To: linuxppc-dev@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
[off-list ref]
wrote:

quoted

Kumar Gala wrote:

quoted

On Dec 17, 2009, at 2:59 AM, Mahajan Vivek-B08308 wrote:

quoted

quoted

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"

quoted

quoted

quoted

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.

quoted

  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-td268
02
038.html

Regarding sata_sil24, Please see my e-mail on Linux-ide for correct

IDSEL value.

quoted

Please first try IDSEL value mentioned in email on Linux-ide. Then
try

this URL..

quoted

--Prabhakar

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