1 /* $Id divert_init.c,v 1.5.6.2 2001/01/24 22:18:17 kai Exp $
2 *
3 * Module init for DSS1 diversion services for i4l.
4 *
5 * Copyright 1999 by Werner Cornelius (werner@isdn4linux.de)
6 *
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
9 *
10 */
11
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15
16 #include "isdn_divert.h"
17
18 MODULE_DESCRIPTION("ISDN4Linux: Call diversion support");
19 MODULE_AUTHOR("Werner Cornelius");
20 MODULE_LICENSE("GPL");
21
22 /****************************************/
23 /* structure containing interface to hl */
24 /****************************************/
25 isdn_divert_if divert_if = {
26 DIVERT_IF_MAGIC, /* magic value */
27 DIVERT_CMD_REG, /* register cmd */
28 ll_callback, /* callback routine from ll */
29 NULL, /* command still not specified */
30 NULL, /* drv_to_name */
31 NULL, /* name_to_drv */
32 };
33
34 /*************************/
35 /* Module interface code */
36 /* no cmd line parms */
37 /*************************/
divert_init(void)38 static int __init divert_init(void)
39 {
40 int i;
41
42 if (divert_dev_init()) {
43 printk(KERN_WARNING "dss1_divert: cannot install device, not loaded\n");
44 return (-EIO);
45 }
46 if ((i = DIVERT_REG_NAME(&divert_if)) != DIVERT_NO_ERR) {
47 divert_dev_deinit();
48 printk(KERN_WARNING "dss1_divert: error %d registering module, not loaded\n", i);
49 return (-EIO);
50 }
51 printk(KERN_INFO "dss1_divert module successfully installed\n");
52 return (0);
53 }
54
55 /**********************/
56 /* Module deinit code */
57 /**********************/
divert_exit(void)58 static void __exit divert_exit(void)
59 {
60 unsigned long flags;
61 int i;
62
63 spin_lock_irqsave(&divert_lock, flags);
64 divert_if.cmd = DIVERT_CMD_REL; /* release */
65 if ((i = DIVERT_REG_NAME(&divert_if)) != DIVERT_NO_ERR) {
66 printk(KERN_WARNING "dss1_divert: error %d releasing module\n", i);
67 spin_unlock_irqrestore(&divert_lock, flags);
68 return;
69 }
70 if (divert_dev_deinit()) {
71 printk(KERN_WARNING "dss1_divert: device busy, remove cancelled\n");
72 spin_unlock_irqrestore(&divert_lock, flags);
73 return;
74 }
75 spin_unlock_irqrestore(&divert_lock, flags);
76 deleterule(-1); /* delete all rules and free mem */
77 deleteprocs();
78 printk(KERN_INFO "dss1_divert module successfully removed \n");
79 }
80
81 module_init(divert_init);
82 module_exit(divert_exit);
83