text: /* $Id: //WIFI_SOC/MP/SDK_4_2_0_0/RT288x_SDK/source/linux-2.6.36.x/drivers/isdn/i4l/isdn_common.h#1 $
   *
   * header for Linux ISDN subsystem
   * common used functions and debugging-switches (linklevel).
   *
   * Copyright 1994-1999  by Fritz Elfert (fritz@isdn4linux.de)
   * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
   * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
   *
   * This software may be used and distributed according to the terms
   * of the GNU General Public License, incorporated herein by reference.
   *
   */
  
  #undef  ISDN_DEBUG_MODEM_OPEN
  #undef  ISDN_DEBUG_MODEM_IOCTL
  #undef  ISDN_DEBUG_MODEM_WAITSENT
  #undef  ISDN_DEBUG_MODEM_HUP
  #undef  ISDN_DEBUG_MODEM_ICALL
  #undef  ISDN_DEBUG_MODEM_DUMP
  #undef  ISDN_DEBUG_MODEM_VOICE
  #undef  ISDN_DEBUG_AT
  #undef  ISDN_DEBUG_NET_DUMP
  #undef  ISDN_DEBUG_NET_DIAL
  #undef  ISDN_DEBUG_NET_ICALL
  
  /* Prototypes */
  extern void isdn_lock_drivers(void);
  extern void isdn_unlock_drivers(void);
  extern void isdn_free_channel(int di, int ch, int usage);
  extern void isdn_all_eaz(int di, int ch);
  extern int  isdn_command(isdn_ctrl *);
  extern int  isdn_dc2minor(int di, int ch);
  extern void isdn_info_update(void);
  extern char *isdn_map_eaz2msn(char *msn, int di);
  extern void isdn_timer_ctrl(int tf, int onoff);
  extern void isdn_unexclusive_channel(int di, int ch);
  extern int  isdn_getnum(char **);
  extern int  isdn_readbchan(int, int, u_char *, u_char *, int, wait_queue_head_t *);
  extern int  isdn_readbchan_tty(int, int, struct tty_struct *, int);
  extern int  isdn_get_free_channel(int, int, int, int, int, char *);
  extern int  isdn_writebuf_skb_stub(int, int, int, struct sk_buff *);
  extern int  register_isdn(isdn_if * i);
  extern int  isdn_msncmp( const char *,  const char *);
  #if defined(ISDN_DEBUG_NET_DUMP) || defined(ISDN_DEBUG_MODEM_DUMP)
  extern void isdn_dumppkt(char *, u_char *, int, int);
  #endif
  