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 */
irda_notify_init(notify_t * notify)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 */
irda_init(void)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 */
irda_cleanup(void)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