From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from wr-out-0506.google.com (wr-out-0506.google.com [64.233.184.230]) by ozlabs.org (Postfix) with ESMTP id 618B0DDE08 for ; Tue, 19 Jun 2007 08:18:59 +1000 (EST) Received: by wr-out-0506.google.com with SMTP id 69so1163291wra for ; Mon, 18 Jun 2007 15:18:58 -0700 (PDT) Message-ID: <720399a30706181518i72fc760arc47ebf3835722edc@mail.gmail.com> Date: Mon, 18 Jun 2007 15:18:57 -0700 From: "Bhupender Saharan" To: sudheer Subject: Re: Regarding MPC8540 IRQ Issue In-Reply-To: <467698BB.7020005@gmail.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_54413_15742459.1182205137365" References: <4673AD08.1080800@gmail.com> <720399a30706161716p33411412w539dafa91923c74d@mail.gmail.com> <467698BB.7020005@gmail.com> Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , ------=_Part_54413_15742459.1182205137365 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Sudhir, You got a try all the interrupt vecrots corressponding to INTA, INTB, INTC and INTD, Not the free interrupts. Bhupi On 6/18/07, sudheer wrote: > > Hi Bhupi > Thanks for the response. > I tried with all the free irqs as per /proc/interrupts in request_irq > function one in each trial. But in none of them it jumped to interrupt > handler. > Please let me know whether this is the one you said to try or anything > else. ? > > Thanks > Sudheer > > Bhupender Saharan wrote: > > Hi Sudhir, > > >From the PCI dump it looks like IRQ PIN register is 0. During enumeration > when BIOS sees that IRQ PIN register is 0, it would not allocate any > interrupt for this card and that's why you are seeing IRQ Line register also > as 0 value. > > We need to do some work around for this. > > IN the driver you need to register for all the pci vectors( INTA,B,C and > D). You would be called for any interrupt happening on the bus. you have to > check if the interrupt is for you and then claim it otherwise return that > interrupt is not for you. > > > Regards > Bhupi > > > On 6/16/07, sudheer wrote: > > > > Hello All > > > > I am working on MPC8540 board placing it in the PCI slot of the x86 > > system. > > After system bootup , i could see the powerpc board detected and pci > > config space configured. > > But i could not find any IRQ assigned for it. > > > > SetUp: > > Host: x86 System- Linux-2.6.9 > > HOST PCI Slot is 64-bit, 66MHz > > Agent: MPC8540 Board. > > > > Here is dump of "lspci -vx " for this device. > > > > 04:03.0 Power PC: Motorola MPC8540 (rev 20) (prog-if 01) > > Flags: bus master, 66Mhz, fast devsel, latency 64 > > Memory at dee00000 (32-bit, non-prefetchable) [size=1M] > > Capabilities: [60] #00 [0000] > > 00: 57 10 08 00 46 01 b0 00 20 01 20 0b 00 40 00 00 > > 10: 00 00 e0 de 00 00 00 00 00 00 00 00 00 00 00 00 > > 20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > > 30: 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00 > > > > >From the above dump - IRQ Pin & Line of config space shows zeroes. > > > > I tried writing a small module and probing for IRQ generating a message > > interrupt. Though i could see in the 8540 message status register that > > interrupt is generated, i could not get any IRQ when i do the probe. For > > > > this trial, i have configured the PIC message enable register, message > > vector/priority and destination registers, processor current task > > priority register (CPTR). > > > > Can anyone give me some suggestions to try out. > > > > Thanks > > Sudheer > > > > _______________________________________________ > > Linuxppc-embedded mailing list > > Linuxppc-embedded@ozlabs.org > > https://ozlabs.org/mailman/listinfo/linuxppc-embedded > > > > > ------=_Part_54413_15742459.1182205137365 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Hi Sudhir,

You got a try all the interrupt vecrots corressponding to INTA, INTB, INTC and INTD, Not the free interrupts.

Bhupi


On 6/18/07, sudheer <urwithsudheer@gmail.com> wrote:
Hi Bhupi
Thanks for the response.
I tried with all the free irqs as per  /proc/interrupts  in request_irq function one in each trial.  But in none of them it jumped to interrupt handler.
Please let me know whether this is the one you said to try or anything else. ?

Thanks
Sudheer


Bhupender Saharan wrote:
Hi Sudhir,

>From the PCI dump it looks like IRQ PIN register is 0. During enumeration when BIOS sees that IRQ PIN register is 0, it would not allocate any interrupt for this card and that's why you are seeing IRQ Line register also as 0 value.

We need to do some work around for this.

 IN the driver you need to register for all the pci vectors( INTA,B,C and D). You would be called for any interrupt happening on the bus. you have to check if the interrupt is for you and then claim it otherwise return that interrupt is not for you.


Regards
Bhupi


On 6/16/07, sudheer <urwithsudheer@gmail.com > wrote:
Hello All

I am working on MPC8540 board placing it in the PCI slot of the x86 system.
After system bootup , i could see the powerpc board detected and pci
config space configured.
But i could not find any IRQ assigned for it.

SetUp:
Host: x86 System- Linux-2.6.9
HOST PCI Slot is 64-bit, 66MHz
Agent: MPC8540 Board.

Here is dump of "lspci -vx " for this device.

04:03.0 Power PC: Motorola MPC8540 (rev 20) (prog-if 01)
        Flags: bus master, 66Mhz, fast devsel, latency 64
        Memory at dee00000 (32-bit, non-prefetchable) [size=1M]
        Capabilities: [60] #00 [0000]
00: 57 10 08 00 46 01 b0 00 20 01 20 0b 00 40 00 00
10: 00 00 e0 de 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 60 00 00 00 00 00 00 00 00 00 00 00

>From the above dump - IRQ Pin & Line of config space shows zeroes.

I tried writing a small module and probing for IRQ generating a message
interrupt. Though i could see in the 8540 message status register that
interrupt is generated, i could not get any IRQ when i do the probe. For
this trial,  i have configured the PIC message enable register, message
vector/priority and destination registers, processor current task
priority register (CPTR).

Can anyone give me some suggestions to try out.

Thanks
Sudheer

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