net/irda/irmod.c

   1 /*********************************************************************
   2  *
   3  * Filename:      irmod.c
   4  * Version:       0.9
   5  * Description:   IrDA stack main entry points
   6  * Status:        Experimental.
   7  * Author:        Dag Brattli <dagb@cs.uit.no>
   8  * Created at:    Mon Dec 15 13:55:39 1997
   9  * Modified at:   Wed Jan  5 15:12:41 2000
  10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
  11  *
  12  *     Copyright (c) 1997, 1999-2000 Dag Brattli, All Rights Reserved.
  13  *     Copyright (c) 2000-2004 Jean Tourrilhes <jt@hpl.hp.com>
  14  *
  15  *     This program is free software; you can redistribute it and/or
  16  *     modify it under the terms of the GNU General Public License as
  17  *     published by the Free Software Foundation; either version 2 of
  18  *     the License, or (at your option) any later version.
  19  *
  20  *     Neither Dag Brattli nor University of Tromsø admit liability nor
  21  *     provide warranty for any of this software. This material is
  22  *     provided "AS-IS" and at no charge.
  23  *
  24  ********************************************************************/
  25
  26 /*
  27  * This file contains the main entry points of the IrDA stack.
  28  * They are in this file and not af_irda.c because some developpers
  29  * are using the IrDA stack without the socket API (compiling out
  30  * af_irda.c).
  31  * Jean II
  32  */
  33
  34 #include <linux/config.h>
  35 #include <linux/module.h>
  36 #include <linux/moduleparam.h>
  37
  38 #include <net/irda/irda.h>
  39 #include <net/irda/irmod.h>             /* notify_t */
  40 #include <net/irda/irlap.h>             /* irlap_init */
  41 #include <net/irda/irlmp.h>             /* irlmp_init */
  42 #include <net/irda/iriap.h>             /* iriap_init */
  43 #include <net/irda/irttp.h>             /* irttp_init */
  44 #include <net/irda/irda_device.h>       /* irda_device_init */
  45
  46 /* irproc.c */
  47 extern void irda_proc_register(void);
  48 extern void irda_proc_unregister(void);
  49 /* irsysctl.c */
  50 extern int  irda_sysctl_register(void);
  51 extern void irda_sysctl_unregister(void);
  52 /* af_irda.c */
  53 extern int  irsock_init(void);
  54 extern void irsock_cleanup(void);
  55 /* irlap_frame.c */
  56 extern int  irlap_driver_rcv(struct sk_buff *, struct net_device *,
  57                              struct packet_type *);
  58
  59 /*
  60  * Module parameters
  61  */
  62 #ifdef CONFIG_IRDA_DEBUG
  63 unsigned int irda_debug = IRDA_DEBUG_LEVEL;
  64 module_param_named(debug, irda_debug, uint, 0);
  65 MODULE_PARM_DESC(debug, "IRDA debugging level");
  66 EXPORT_SYMBOL(irda_debug);
  67 #endif
  68
  69 /* Packet type handler.
  70  * Tell the kernel how IrDA packets should be handled.
  71  */
  72 static struct packet_type irda_packet_type = {
  73         .type   = __constant_htons(ETH_P_IRDA),
  74         .func   = irlap_driver_rcv,     /* Packet type handler irlap_frame.c */
  75 };
  76
  77 /*
  78  * Function irda_notify_init (notify)
  79  *
  80  *    Used for initializing the notify structure
  81  *
  82  */
  83 void irda_notify_init(notify_t *notify)
  84 {
  85         notify->data_indication = NULL;
  86         notify->udata_indication = NULL;
  87         notify->connect_confirm = NULL;
  88         notify->connect_indication = NULL;
  89         notify->disconnect_indication = NULL;
  90         notify->flow_indication = NULL;
  91         notify->status_indication = NULL;
  92         notify->instance = NULL;
  93         strlcpy(notify->name, "Unknown", sizeof(notify->name));
  94 }
  95 EXPORT_SYMBOL(irda_notify_init);
  96
  97 /*
  98  * Function irda_init (void)
  99  *
 100  *  Protocol stack initialisation entry point.
 101  *  Initialise the various components of the IrDA stack
 102  */
 103 static int __init irda_init(void)
 104 {
 105         IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
 106
 107         /* Lower layer of the stack */
 108         irlmp_init();
 109         irlap_init();
 110
 111         /* Higher layers of the stack */
 112         iriap_init();
 113         irttp_init();
 114         irsock_init();
 115
 116         /* Add IrDA packet type (Start receiving packets) */
 117         dev_add_pack(&irda_packet_type);
 118
 119         /* External APIs */
 120 #ifdef CONFIG_PROC_FS
 121         irda_proc_register();
 122 #endif
 123 #ifdef CONFIG_SYSCTL
 124         irda_sysctl_register();
 125 #endif
 126
 127         /* Driver/dongle support */
 128         irda_device_init();
 129
 130         return 0;
 131 }
 132
 133 /*
 134  * Function irda_cleanup (void)
 135  *
 136  *  Protocol stack cleanup/removal entry point.
 137  *  Cleanup the various components of the IrDA stack
 138  */
 139 static void __exit irda_cleanup(void)
 140 {
 141         /* Remove External APIs */
 142 #ifdef CONFIG_SYSCTL
 143         irda_sysctl_unregister();
 144 #endif
 145 #ifdef CONFIG_PROC_FS
 146         irda_proc_unregister();
 147 #endif
 148
 149         /* Remove IrDA packet type (stop receiving packets) */
 150         dev_remove_pack(&irda_packet_type);
 151
 152         /* Remove higher layers */
 153         irsock_cleanup();
 154         irttp_cleanup();
 155         iriap_cleanup();
 156
 157         /* Remove lower layers */
 158         irda_device_cleanup();
 159         irlap_cleanup(); /* Must be done before irlmp_cleanup()! DB */
 160
 161         /* Remove middle layer */
 162         irlmp_cleanup();
 163 }
 164
 165 /*
 166  * The IrDA stack must be initialised *before* drivers get initialised,
 167  * and *before* higher protocols (IrLAN/IrCOMM/IrNET) get initialised,
 168  * otherwise bad things will happen (hashbins will be NULL for example).
 169  * Those modules are at module_init()/device_initcall() level.
 170  *
 171  * On the other hand, it needs to be initialised *after* the basic
 172  * networking, the /proc/net filesystem and sysctl module. Those are
 173  * currently initialised in .../init/main.c (before initcalls).
 174  * Also, IrDA drivers needs to be initialised *after* the random number
 175  * generator (main stack and higher layer init don't need it anymore).
 176  *
 177  * Jean II
 178  */
 179 subsys_initcall(irda_init);
 180 module_exit(irda_cleanup);
 181
 182 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no> & Jean Tourrilhes <jt@hpl.hp.com>");
 183 MODULE_DESCRIPTION("The Linux IrDA Protocol Stack");
 184 MODULE_LICENSE("GPL");
 185 MODULE_ALIAS_NETPROTO(PF_IRDA);