From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from web36612.mail.mud.yahoo.com (web36612.mail.mud.yahoo.com [209.191.85.29]) by ozlabs.org (Postfix) with SMTP id 8C46967CAA for ; Thu, 24 Aug 2006 22:52:08 +1000 (EST) Message-ID: <20060824125206.18305.qmail@web36612.mail.mud.yahoo.com> Date: Thu, 24 Aug 2006 05:52:06 -0700 (PDT) From: Parav Pandit Subject: MPC8555 PCI interrupts are not coming To: linuxppc-embedded@ozlabs.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-529286412-1156423926=:17980" List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --0-529286412-1156423926=:17980 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Hi, Can someone give light on PCI interrupts routing to the OS from the openPIC? Basically I am able to talk to PCI end device connected on MPC8555 board in 2.6.13 but not getting interrupts reported by my device. When I read the INTERRUPT_LINE byte, it comes as 0. pdev->irq is also reporting 0. Due to that request_irq() fails. But now I request for IRQ line 8 + openPIC offset. Handler gets registered but still not getting the interrupts. (PCI interrupt line is 8,9 in case of MPC8555). Can anyone please guide me, what are the different things need be configure in the platform code to receive the PCI interrupts in the driver? I don't understand the pci_irq_table, and what it should represent? Currrently no one is writing the INTERRUPT LINE value in the config space. In which function I should configure that value? pcibios_fixup?? Regards, Parav Pandit --------------------------------- Do you Yahoo!? Get on board. You're invited to try the new Yahoo! Mail. --0-529286412-1156423926=:17980 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: 8bit
Hi,
 
Can someone give light on PCI interrupts routing to the OS from the openPIC?
 
Basically I am able to talk to PCI end device connected on MPC8555 board in 2.6.13 but not getting interrupts reported by my device.
 
When I read the INTERRUPT_LINE byte, it comes as 0. pdev->irq is also reporting 0.
Due to that request_irq() fails. But now I request for IRQ line 8 + openPIC offset.
Handler gets registered but still not getting the interrupts. (PCI interrupt line is 8,9 in case of MPC8555).
 
Can anyone please guide me, what are the different things need be configure in the platform code to receive the PCI interrupts in the driver?
 
I don't understand the pci_irq_table, and what it should represent?
Currrently no one is writing the INTERRUPT LINE value in the config space.
In which function I should configure that value? pcibios_fixup??
 
Regards,
Parav Pandit
 

Do you Yahoo!?
Get on board. You're invited to try the new Yahoo! Mail. --0-529286412-1156423926=:17980-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from az33egw01.freescale.net (az33egw01.freescale.net [192.88.158.102]) by ozlabs.org (Postfix) with ESMTP id D77C467C48 for ; Sat, 26 Aug 2006 02:08:07 +1000 (EST) In-Reply-To: <20060824125206.18305.qmail@web36612.mail.mud.yahoo.com> References: <20060824125206.18305.qmail@web36612.mail.mud.yahoo.com> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <3E6E785F-7282-45EA-99C9-E77A82D4577B@freescale.com> From: Andy Fleming Subject: Re: MPC8555 PCI interrupts are not coming Date: Fri, 25 Aug 2006 11:08:05 -0500 To: Parav Pandit Cc: linuxppc-embedded@ozlabs.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Aug 24, 2006, at 07:52, Parav Pandit wrote: > Hi, > > Can someone give light on PCI interrupts routing to the OS from the > openPIC? The routing depends on your board. On the CDS board, PCI interrupts are mapped to ext[0-3]. On the ADS, they are mapped to ext[1-4]. There are four PCI interrupts (A,B,C,D), and they are usually swizzled so that different slots have a different mapping (this way, two cards in different slots which use interrupt A don't conflict). > > Basically I am able to talk to PCI end device connected on MPC8555 > board in 2.6.13 but not getting interrupts reported by my device. > > When I read the INTERRUPT_LINE byte, it comes as 0. pdev->irq is > also reporting 0. > Due to that request_irq() fails. But now I request for IRQ line 8 + > openPIC offset. > Handler gets registered but still not getting the interrupts. (PCI > interrupt line is 8,9 in case of MPC8555). When are you trying to read the interrupt_line byte? In 2.6.13, you need to have an IRQ mapping function, which takes the idsel reported by the slot, and converts it to the interrupt number for the PIC. That code also writes the INTERRUPT_LINE byte. > > Can anyone please guide me, what are the different things need be > configure in the platform code to receive the PCI interrupts in the > driver? > > I don't understand the pci_irq_table, and what it should represent? > Currrently no one is writing the INTERRUPT LINE value in the config > space. > In which function I should configure that value? pcibios_fixup?? > > Regards, > Parav Pandit > > > Do you Yahoo!? > Get on board. You're invited to try the new Yahoo! Mail. > _______________________________________________ > Linuxppc-embedded mailing list > Linuxppc-embedded@ozlabs.org > https://ozlabs.org/mailman/listinfo/linuxppc-embedded