int ivtv_s_frequency(struct file *file, void *fh, struct v4l2_frequency *vf);
int ivtv_s_input(struct file *file, void *fh, unsigned int inp);
long ivtv_v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
int ivtv_s_frequency(struct file *file, void *fh, struct v4l2_frequency *vf);
int ivtv_s_input(struct file *file, void *fh, unsigned int inp);
long ivtv_v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);