text: /*
   * Definitions for USB serial mobile broadband cards
   */
  
  #ifndef __LINUX_USB_USB_WWAN
  #define __LINUX_USB_USB_WWAN
  
  extern void usb_wwan_dtr_rts(struct usb_serial_port *port, int on);
  extern int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port);
  extern void usb_wwan_close(struct usb_serial_port *port);
  extern int usb_wwan_port_probe(struct usb_serial_port *port);
  extern int usb_wwan_port_remove(struct usb_serial_port *port);
  extern int usb_wwan_write_room(struct tty_struct *tty);
  extern int usb_wwan_tiocmget(struct tty_struct *tty);
  extern int usb_wwan_tiocmset(struct tty_struct *tty,
  			     unsigned int set, unsigned int clear);
  extern int usb_wwan_ioctl(struct tty_struct *tty,
  			  unsigned int cmd, unsigned long arg);
  extern int usb_wwan_write(struct tty_struct *tty, struct usb_serial_port *port,
  			  const unsigned char *buf, int count);
  extern int usb_wwan_chars_in_buffer(struct tty_struct *tty);
  #ifdef CONFIG_PM
  extern int usb_wwan_suspend(struct usb_serial *serial, pm_message_t message);
  extern int usb_wwan_resume(struct usb_serial *serial);
  #endif
  
  /* per port private data */
  
  #define N_IN_URB 4
  #define N_OUT_URB 4
  #define IN_BUFLEN 4096
  #define OUT_BUFLEN 4096
  
  struct usb_wwan_intf_private {
  	spinlock_t susp_lock;
  	unsigned int suspended:1;
  	unsigned int use_send_setup:1;
  	int in_flight;
  	unsigned int open_ports;
  	void *private;
  };
  
  struct usb_wwan_port_private {
  	/* Input endpoints and buffer for this port */
  	struct urb *in_urbs[N_IN_URB];
  	u8 *in_buffer[N_IN_URB];
  	/* Output endpoints and buffer for this port */
  	struct urb *out_urbs[N_OUT_URB];
  	u8 *out_buffer[N_OUT_URB];
  	unsigned long out_busy;	/* Bit vector of URBs in use */
  	struct usb_anchor delayed;
  
  	/* Settings for the port */
  	int rts_state;		/* Handshaking pins (outputs) */
  	int dtr_state;
  	int cts_state;		/* Handshaking pins (inputs) */
  	int dsr_state;
  	int dcd_state;
  	int ri_state;
  
  	unsigned long tx_start_time[N_OUT_URB];
  };
  
  #endif /* __LINUX_USB_USB_WWAN */
  