It's possible to fit a psx controller hack into a SNES controller behind the existing board.
Writing your own linux driver for it is braindead. You'd be much better off building a small device that translates the scancodes at hardware level.
The point was that gamecon already decodes SNES and PSX controllers so 3/4 of the work is done. All that reamans is inverting the PSX protocall and your done. If I had the 2ng parallel port, a PS2 and a SNES controller I could do the coding in an night or two. And I would find it fun to do.
Spending a mouth or so learning C and a week or two learning kernel programming just to hook a SNES controller up to PS2, when any of the above is not your idea of fun, would be brain dead. But as he was asking on Build YOAC not Buy YOAC, I thought he might like to know that he could build one if he wanted to.
-slightly annoyed at having his 2nd post called "baindead",
Aredhel