Excerpt from Gamegon_gpio_rpi README

gistfile1.txt

Copy the driver to module path
# mkdir /lib/modules/`uname -r`/kernel/drivers/input/joystick
# cp gamecon_gpio_rpi.ko /lib/modules/`uname -r`/kernel/drivers/input/joystick/
# depmod -a

4.2 Configure pads
# modprobe gamecon_gpio_rpi map=<pad1/GPIO0>,<pad2/GPIO1>,<pad3/GPIO4>,<pad4/GPIO7>
        where <pad...> is a number defining the pad type:
        0 = no connection
        1 = SNES pad
        2 = NES pad
        6 = N64 pad
        9 = SNES mouse

For example, if a snes pad is connected to GPIO0 and a N64 pad to GPIO7, the command would be "modprobe gamecon_gpio_rpi map=1,0,0,6"

Use "tail /var/log/kern.log" to verify that module loading was successful

4.3 Testing the pads
# apt-get install joystick
# jstest /dev/input/jsX
        where X corresponds to the pad id (0-3)

4.4 Calibrating the axis of N64 analog pad
# jscal -s 4,1,0,0,0,6972137,6972137,1,0,0,0,6547006,6468127,1,0,0,0,536854528,536854528,1,0,0,0,536854528,536854528 /dev/input/jsX