struct ff_condition_effect — defines a spring or friction force-feedback effect
struct ff_condition_effect {
__u16 right_saturation;
__u16 left_saturation;
__s16 right_coeff;
__s16 left_coeff;
__u16 deadband;
__s16 center;
}; maximum level when joystick moved all way to the right
same for the left side
controls how fast the force grows when the joystick moves to the right
same for the left side
size of the dead zone, where no force is produced
position of the dead zone