[U-Boot-Users] MPC83xx PCI support - TQM834x patch?

[U-Boot-Users] MPC83xx PCI support - TQM834x patch?

[David Updegraff]

Kumar, et.al.

..and there is also this errata still in processor Revs. 1.0, 1.1 

MPC8349ECE.pdf, see Errata PCI6.

"Pci host configuration read from unused slot terminates with CSB error"

To my understanding, this errata prohibits speculative scanning of the
PCI bus.  So that you must only query slots/devid's you know ahead of
time are valid..  Right?

-dbu.

[U-Boot-Users] MPC83xx PCI support - TQM834x patch?

[Kumar Gala]

David,

That should be fixed in rev1.1 or greater parts.

- kumar

On Nov 8, 2005, at 8:23 AM, David Updegraff wrote:

> Kumar, et.al.
>
> ..and there is also this errata still in processor Revs. 1.0, 1.1
>
> MPC8349ECE.pdf, see Errata PCI6.
>
> "Pci host configuration read from unused slot terminates with CSB  
> error"
>
> To my understanding, this errata prohibits speculative scanning of the
> PCI bus.  So that you must only query slots/devid's you know ahead of
> time are valid..  Right?
>
> -dbu.
>
>
>
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[U-Boot-Users] MPC83xx PCI support - TQM834x patch?

[Kumar Gala]

Rafal,

I'm confused by the following patch that adds support for PCI for the  
TQM834x:

http://tinyurl.com/btkwd

Where are you setting up the PCILAWBAR/PCILAWARs, and Inbound/ 
Outbound ATU windows?  At a minimum that PCILAWBAR/PCILAWAR needs to  
get setup in u-boot for the kernel PCI code to work.  The Linux  
kernel doesn't expect to setup PCILAWBAR/PCILAWAR.

I ask because I'm trying to get PCI work on the MPC834x ADS board and  
noticed as part of your patch you removed cpu/mpc83xx/pci.c

- kumar

[U-Boot-Users] MPC83xx PCI support - TQM834x patch?

[Chu hanjin-r52514]

To make MPC834x ADS board working, the i2c needs to be configured correctly. Not sure if the patch that adds support for PCI for the  TQM834x indicated by Kumar also support this? In the latest u-boot 1.1.3 release, it also supports PCI for MPC834xADS under cpu/mpc83xx/pci.c.

Best Regards

Neil Chu 


-----Original Message-----
From: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin at lists.sourceforge.net]On Behalf Of Kumar Gala
Sent: Tuesday, November 08, 2005 10:33 PM
To: raj at denx.de
Cc: U-Boot Users
Subject: [U-Boot-Users] MPC83xx PCI support - TQM834x patch?


Rafal,

I'm confused by the following patch that adds support for PCI for the  
TQM834x:

http://tinyurl.com/btkwd

Where are you setting up the PCILAWBAR/PCILAWARs, and Inbound/ 
Outbound ATU windows?  At a minimum that PCILAWBAR/PCILAWAR needs to  
get setup in u-boot for the kernel PCI code to work.  The Linux  
kernel doesn't expect to setup PCILAWBAR/PCILAWAR.

I ask because I'm trying to get PCI work on the MPC834x ADS board and  
noticed as part of your patch you removed cpu/mpc83xx/pci.c

- kumar



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