divert_init.c revision 03f18285cd2c2c065c6f5a4046e1eee0b45e4e0e 
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
18MODULE_DESCRIPTION("ISDN4Linux: Call diversion support");
19MODULE_AUTHOR("Werner Cornelius");
20MODULE_LICENSE("GPL");
21
22/****************************************/
23/* structure containing interface to hl */
24/****************************************/
25isdn_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/*************************/
38static 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/**********************/
58static 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
81module_init(divert_init);
82module_exit(divert_exit);
83