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