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 "isdn_divert.h"
  16
  17 MODULE_DESCRIPTION("ISDN4Linux: Call diversion support");
  18 MODULE_AUTHOR("Werner Cornelius");
  19 MODULE_LICENSE("GPL");
  20
  21 /********************/
  22 /* needed externals */
  23 /********************/
  24 extern int printk(const char *fmt,...);
  25
  26 /****************************************/
  27 /* structure containing interface to hl */
  28 /****************************************/
  29 isdn_divert_if divert_if =
  30   { DIVERT_IF_MAGIC,  /* magic value */
  31     DIVERT_CMD_REG,   /* register cmd */
  32     ll_callback,      /* callback routine from ll */
  33     NULL,             /* command still not specified */
  34     NULL,             /* drv_to_name */
  35     NULL,             /* name_to_drv */
  36   };
  37
  38 /*************************/
  39 /* Module interface code */
  40 /* no cmd line parms     */
  41 /*************************/
  42 static int __init divert_init(void)
  43 { int i;
  44
  45   if (divert_dev_init())
  46    { printk(KERN_WARNING "dss1_divert: cannot install device, not loaded\n");
  47      return(-EIO);
  48    }
  49   if ((i = DIVERT_REG_NAME(&divert_if)) != DIVERT_NO_ERR)
  50    { divert_dev_deinit();
  51      printk(KERN_WARNING "dss1_divert: error %d registering module, not loaded\n",i);
  52      return(-EIO);
  53    }
  54   printk(KERN_INFO "dss1_divert module successfully installed\n");
  55   return(0);
  56 }
  57
  58 /**********************/
  59 /* Module deinit code */
  60 /**********************/
  61 static void __exit divert_exit(void)
  62 { unsigned long flags;
  63   int i;
  64
  65   save_flags(flags);
  66   cli();
  67   divert_if.cmd = DIVERT_CMD_REL; /* release */
  68   if ((i = DIVERT_REG_NAME(&divert_if)) != DIVERT_NO_ERR)
  69    { printk(KERN_WARNING "dss1_divert: error %d releasing module\n",i);
  70      restore_flags(flags);
  71      return;
  72    }
  73   if (divert_dev_deinit())
  74    { printk(KERN_WARNING "dss1_divert: device busy, remove cancelled\n");
  75      restore_flags(flags);
  76      return;
  77    }
  78   restore_flags(flags);
  79   deleterule(-1); /* delete all rules and free mem */
  80   deleteprocs();
  81   printk(KERN_INFO "dss1_divert module successfully removed \n");
  82 }
  83
  84 module_init(divert_init);
  85 module_exit(divert_exit);
  86