There are no device specific key mappings. The default is always dpad for movement, touchscreen for looking around, full screen to shoot. This is the best I could come up with on my n800 that would somewhat allow movement, shooting, and looking around all at the same time, but I just got my n810 today, and it is quite a bit more difficult to play with those on it, but I don't really know what would be any better. You can change key mappings by placing an user.cfg file in your basedir, and placing q2 bind commands there.