eap_gameport_args
struct eap_gameport_args gpargs;
struct eap_gameport_args gpargs;
device_t eap_joy_attach(device_t, struct eap_gameport_args *);
int eap_joy_detach(device_t, struct eap_gameport_args *);
eap_joy_attach(device_t eapdev, struct eap_gameport_args *gpa)
eap_joy_detach(device_t joydev, struct eap_gameport_args *gpa)