[U-Boot-Users] PCI initialization in U-Boot

Dan Poirot dtpoirot at sbcglobal.net
Mon Nov 1 22:00:00 CET 2004


> I am writing a standalone application and my initial development
> must use these boards, unfortunately I can't use an OS to set
> PCI up properly.


...then you really must understand the Tval min issue as described by Mark Jonas/freescale:

Please note that this problem needs two partners to be seen. On the one hand, MPC5200 violates Tvalmin by having this about 1ns
instead of at least 2 ns according to spec. On the other hand, a PCI card needs to be able to handle a Tvalmin of down to 0 ns when
somebody reads from it. So if both sides behave badly the card is not recognized during Type-0 configuration.


I understand from our friends at freescale that the PCI timing issue is resolved in the next rev of the chip.


- dan





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