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Linux/net/irda/irmod.c

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  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 __read_mostly = {
 59         .type   = cpu_to_be16(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", __func__);
 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);
212 

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