static void ir_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void ir_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void ir_set_termios (struct usb_serial_port *port, struct termios *old_termios);
static void ir_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void ir_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
static void ir_set_termios (struct usb_serial_port *port, struct termios *old_termios);