Messages in this thread | | | Date | Thu, 16 Sep 1999 18:02:11 -0700 | From | Rich Bodo <> | Subject | PLX 9050 chip |
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Hi,
Does anyone on this list have experience with the PLX 9050 PCI bus interface chip? I am having this strange problem when reading from registers in a xilinx across the local bus. I can read pci config registers, local config registers, and even the xilinx registes, until I do a write to the xilinx. After that, I can no longer read from anywhere on the local bus. I have implemented the PLX workarounds mentioned in their FAQ and Errata. Looking at a scope, I can see that I am reading and writing to the local bus, but I get squat back from the plx for reads.
I also want to make sure I am not re-inventing the wheel. Grepping through the kernel I found:
Some 9060 drivers Lots of multi-port serial cards that use the 9050, are based on serial.c and read their config from an eeprom.
I am working on a card that will use a lot of the features of the 9050, including burst mode across the local bus. I also implement all the workarounds in software and don't have an eeprom to work with, so I have to do a little extra setup. There is a neat PLX supplied tool called PLXmon that I am able to run under FreeDOS to get and set register values, I am thinking of writing a linux version.
-Rich
-- OST - the open source telecom corporation Rich Bodo | rsb@ostel.com | 650-964-4-OST
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