divert_init.c

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/* $Id divert_init.c,v 1.5.6.2 2001/01/24 22:18:17 kai Exp $
 *
 * Module init for DSS1 diversion services for i4l.
 *
 * Copyright 1999       by Werner Cornelius ([email protected])
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>

#include "isdn_divert.h"

MODULE_DESCRIPTION("ISDN4Linux: Call diversion support");
MODULE_AUTHOR("Werner Cornelius");
MODULE_LICENSE("GPL");

/****************************************/
/* structure containing interface to hl */
/****************************************/
isdn_divert_if divert_if =
{ DIVERT_IF_MAGIC,  /* magic value */
  DIVERT_CMD_REG,   /* register cmd */
  ll_callback,      /* callback routine from ll */
  NULL,             /* command still not specified */
  NULL,             /* drv_to_name */
  NULL,             /* name_to_drv */
};

/*************************/
/* Module interface code */
/* no cmd line parms     */
/*************************/
static int __init divert_init(void)
{ int i;

    if (divert_dev_init())
    { printk(KERN_WARNING "dss1_divert: cannot install device, not loaded\n");
        return (-EIO);
    }
    if ((i = DIVERT_REG_NAME(&divert_if)) != DIVERT_NO_ERR)
    { divert_dev_deinit();
        printk(KERN_WARNING "dss1_divert: error %d registering module, not loaded\n", i);
        return (-EIO);
    }
    printk(KERN_INFO "dss1_divert module successfully installed\n");
    return (0);
}

/**********************/
/* Module deinit code */
/**********************/
static void __exit divert_exit(void)
{
    unsigned long flags;
    int i;

    spin_lock_irqsave(&divert_lock, flags);
    divert_if.cmd = DIVERT_CMD_REL; /* release */
    if ((i = DIVERT_REG_NAME(&divert_if)) != DIVERT_NO_ERR)
    { printk(KERN_WARNING "dss1_divert: error %d releasing module\n", i);
        spin_unlock_irqrestore(&divert_lock, flags);
        return;
    }
    if (divert_dev_deinit())
    { printk(KERN_WARNING "dss1_divert: device busy, remove cancelled\n");
        spin_unlock_irqrestore(&divert_lock, flags);
        return;
    }
    spin_unlock_irqrestore(&divert_lock, flags);
    deleterule(-1); /* delete all rules and free mem */
    deleteprocs();
    printk(KERN_INFO "dss1_divert module successfully removed \n");
}

module_init(divert_init);
module_exit(divert_exit);