drivers/isdn/divert/divert_init.c

   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/version.h>
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16
  17 #include "isdn_divert.h"
  18
  19 MODULE_DESCRIPTION("ISDN4Linux: Call diversion support");
  20 MODULE_AUTHOR("Werner Cornelius");
  21 MODULE_LICENSE("GPL");
  22
  23 /****************************************/
  24 /* structure containing interface to hl */
  25 /****************************************/
  26 isdn_divert_if divert_if =
  27   { DIVERT_IF_MAGIC,  /* magic value */
  28     DIVERT_CMD_REG,   /* register cmd */
  29     ll_callback,      /* callback routine from ll */
  30     NULL,             /* command still not specified */
  31     NULL,             /* drv_to_name */
  32     NULL,             /* name_to_drv */
  33   };
  34
  35 /*************************/
  36 /* Module interface code */
  37 /* no cmd line parms     */
  38 /*************************/
  39 static int __init divert_init(void)
  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 /**********************/
  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