In message [ref],Meelis Roos writes:

So the current state is that drivers/atm contains the C dump of fore 200 
firmware in drivers/atm/fore200e_pca_fw.c but this firmware is not built 
and not installed by make install. It's also not present in 
linux-firware tree/packages so the fore driver can not load its firmware 
from anywhere. I guess this is not the intended outcome.

this firmware is in the linux-atm source tree now.  the 2.5.1 release
should have the firmware.

http://sourceforge.net/projects/linux-atm/files/