I've been working with Mark Knecht tracking down his problem with his
cards not initializing properly every boot. We're using the PCI
subsystem information to say "card 0 is a 250", but when we map the io
and start chatting on the I2C, we've obviously got a 150. We detect
card 1 as a 150, but it is clearly a 250 once we talk to it. Mark's
been really great about providing me information. Finally I've hit a
brick wall with this bit of information:
--- WORKING BOOUP ---
cat /proc/bus/pci/01/01.0 | od -Ax -t x1
000000 44 44 16 00 06 00 10 02 01 00 00 04 08 40 00 00
000010 08 00 00 f0 00 00 00 00 00 00 00 00 00 00 00 00
000020 00 00 00 00 00 00 00 00 00 00 00 00 70 00 03 80
000030 00 00 00 00 44 00 00 00 00 00 00 00 05 01 80 08
cat /proc/bus/pci/01/02.0 | od -Ax -t x1
000000 44 44 16 00 06 00 10 02 01 00 00 04 08 40 00 00
000010 08 00 00 f4 00 00 00 00 00 00 00 00 00 00 00 00
000020 00 00 00 00 00 00 00 00 00 00 00 00 70 00 09 40
000030 00 00 00 00 44 00 00 00 00 00 00 00 03 01 80 08
--- BUSTED BOOTUP ---
cat /proc/bus/pci/01/01.0 | od -Ax -t x1
000000 44 44 16 00 06 00 10 02 01 00 00 04 08 40 00 00
000010 08 00 00 f0 00 00 00 00 00 00 00 00 00 00 00 00
000020 00 00 00 00 00 00 00 00 00 00 00 00 70 00 03 00
000030 00 00 00 00 44 00 00 00 00 00 00 00 05 01 80 08
cat /proc/bus/pci/01/02.0 | od -Ax -t x1
000000 44 44 16 00 06 00 10 02 01 00 00 04 08 40 00 00
000010 08 00 00 f4 00 00 00 00 00 00 00 00 00 00 00 00
000020 00 00 00 00 00 00 00 00 00 00 00 00 70 00 09 00
000030 00 00 00 00 44 00 00 00 00 00 00 00 03 01 80 08
Note that the difference between the two is that the PCI subsystem
device field statring at 0x2e is cleared in the non-working system.
This throws off our autodetection and causes us to set up wrong, as that
byte is significant:
device 00 03 -> PVR250
device 80 03 -> PVR150
device 00 09 -> PVR150
device 40 09 -> PVR250
Has anyone ever seen this behavior? How in the heck can this be
happening? It is rather consistent, and only that one byte gets messed up!
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