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/module.h>
  35 #include <linux/moduleparam.h>
  36
  37 #include <net/irda/irda.h>
  38 #include <net/irda/irmod.h>             /* notify_t */
  39 #include <net/irda/irlap.h>             /* irlap_init */
  40 #include <net/irda/irlmp.h>             /* irlmp_init */
  41 #include <net/irda/iriap.h>             /* iriap_init */
  42 #include <net/irda/irttp.h>             /* irttp_init */
  43 #include <net/irda/irda_device.h>       /* irda_device_init */
  44
  45 /*
  46  * Module parameters
  47  */
  48 #ifdef CONFIG_IRDA_DEBUG
  49 unsigned int irda_debug = IRDA_DEBUG_LEVEL;
  50 module_param_named(debug, irda_debug, uint, 0);
  51 MODULE_PARM_DESC(debug, "IRDA debugging level");
  52 EXPORT_SYMBOL(irda_debug);
  53 #endif
  54
  55 /* Packet type handler.
  56  * Tell the kernel how IrDA packets should be handled.
  57  */
  58 static struct packet_type irda_packet_type = {
  59         .type   = __constant_htons(ETH_P_IRDA),
  60         .func   = irlap_driver_rcv,     /* Packet type handler irlap_frame.c */
  61 };
  62
  63 /*
  64  * Function irda_notify_init (notify)
  65  *
  66  *    Used for initializing the notify structure
  67  *
  68  */
  69 void irda_notify_init(notify_t *notify)
  70 {
  71         notify->data_indication = NULL;
  72         notify->udata_indication = NULL;
  73         notify->connect_confirm = NULL;
  74         notify->connect_indication = NULL;
  75         notify->disconnect_indication = NULL;
  76         notify->flow_indication = NULL;
  77         notify->status_indication = NULL;
  78         notify->instance = NULL;
  79         strlcpy(notify->name, "Unknown", sizeof(notify->name));
  80 }
  81 EXPORT_SYMBOL(irda_notify_init);
  82
  83 /*
  84  * Function irda_init (void)
  85  *
  86  *  Protocol stack initialisation entry point.
  87  *  Initialise the various components of the IrDA stack
  88  */
  89 static int __init irda_init(void)
  90 {
  91         int ret = 0;
  92
  93         IRDA_DEBUG(0, "%s()\n", __FUNCTION__);
  94
  95         /* Lower layer of the stack */
  96         irlmp_init();
  97         irlap_init();
  98
  99         /* Driver/dongle support */
 100         irda_device_init();
 101
 102         /* Higher layers of the stack */
 103         iriap_init();
 104         irttp_init();
 105         ret = irsock_init();
 106         if (ret < 0)
 107                 goto out_err_1;
 108
 109         /* Add IrDA packet type (Start receiving packets) */
 110         dev_add_pack(&irda_packet_type);
 111
 112         /* External APIs */
 113 #ifdef CONFIG_PROC_FS
 114         irda_proc_register();
 115 #endif
 116 #ifdef CONFIG_SYSCTL
 117         ret = irda_sysctl_register();
 118         if (ret < 0)
 119                 goto out_err_2;
 120 #endif
 121
 122         ret = irda_nl_register();
 123         if (ret < 0)
 124                 goto out_err_3;
 125
 126         return 0;
 127
 128  out_err_3:
 129 #ifdef CONFIG_SYSCTL
 130         irda_sysctl_unregister();
 131  out_err_2:
 132 #endif
 133 #ifdef CONFIG_PROC_FS
 134         irda_proc_unregister();
 135 #endif
 136
 137         /* Remove IrDA packet type (stop receiving packets) */
 138         dev_remove_pack(&irda_packet_type);
 139
 140         /* Remove higher layers */
 141         irsock_cleanup();
 142  out_err_1:
 143         irttp_cleanup();
 144         iriap_cleanup();
 145
 146         /* Remove lower layers */
 147         irda_device_cleanup();
 148         irlap_cleanup(); /* Must be done before irlmp_cleanup()! DB */
 149
 150         /* Remove middle layer */
 151         irlmp_cleanup();
 152
 153
 154         return ret;
 155 }
 156
 157 /*
 158  * Function irda_cleanup (void)
 159  *
 160  *  Protocol stack cleanup/removal entry point.
 161  *  Cleanup the various components of the IrDA stack
 162  */
 163 static void __exit irda_cleanup(void)
 164 {
 165         /* Remove External APIs */
 166         irda_nl_unregister();
 167
 168 #ifdef CONFIG_SYSCTL
 169         irda_sysctl_unregister();
 170 #endif
 171 #ifdef CONFIG_PROC_FS
 172         irda_proc_unregister();
 173 #endif
 174
 175         /* Remove IrDA packet type (stop receiving packets) */
 176         dev_remove_pack(&irda_packet_type);
 177
 178         /* Remove higher layers */
 179         irsock_cleanup();
 180         irttp_cleanup();
 181         iriap_cleanup();
 182
 183         /* Remove lower layers */
 184         irda_device_cleanup();
 185         irlap_cleanup(); /* Must be done before irlmp_cleanup()! DB */
 186
 187         /* Remove middle layer */
 188         irlmp_cleanup();
 189 }
 190
 191 /*
 192  * The IrDA stack must be initialised *before* drivers get initialised,
 193  * and *before* higher protocols (IrLAN/IrCOMM/IrNET) get initialised,
 194  * otherwise bad things will happen (hashbins will be NULL for example).
 195  * Those modules are at module_init()/device_initcall() level.
 196  *
 197  * On the other hand, it needs to be initialised *after* the basic
 198  * networking, the /proc/net filesystem and sysctl module. Those are
 199  * currently initialised in .../init/main.c (before initcalls).
 200  * Also, IrDA drivers needs to be initialised *after* the random number
 201  * generator (main stack and higher layer init don't need it anymore).
 202  *
 203  * Jean II
 204  */
 205 subsys_initcall(irda_init);
 206 module_exit(irda_cleanup);
 207
 208 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no> & Jean Tourrilhes <jt@hpl.hp.com>");
 209 MODULE_DESCRIPTION("The Linux IrDA Protocol Stack");
 210 MODULE_LICENSE("GPL");
 211 MODULE_ALIAS_NETPROTO(PF_IRDA);