drivers/staging/dgrp/dgrp_driver.c

   1 /*
   2  *
   3  * Copyright 1999-2003 Digi International (www.digi.com)
   4  *     Jeff Randall
   5  *     James Puzzo  <jamesp at digi dot com>
   6  *     Scott Kilau  <Scott_Kilau at digi dot com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
  15  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  16  * PURPOSE.  See the GNU General Public License for more details.
  17  *
  18  */
  19
  20 /*
  21  *      Driver specific includes
  22  */
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/tty.h>
  26
  27 /*
  28  *  PortServer includes
  29  */
  30 #include "dgrp_common.h"
  31
  32
  33 MODULE_LICENSE("GPL");
  34 MODULE_AUTHOR("Digi International, http://www.digi.com");
  35 MODULE_DESCRIPTION("RealPort driver for Digi's ethernet-based serial connectivity product line");
  36 MODULE_VERSION(DIGI_VERSION);
  37
  38 struct list_head nd_struct_list;
  39 struct dgrp_poll_data dgrp_poll_data;
  40
  41 int dgrp_register_cudevices = 1;/* Turn on/off registering legacy cu devices */
  42 int dgrp_register_prdevices = 1;/* Turn on/off registering transparent print */
  43 int dgrp_poll_tick = 20;        /* Poll interval - in ms */
  44
  45 module_param_named(register_cudevices, dgrp_register_cudevices, int, 0644);
  46 MODULE_PARM_DESC(register_cudevices, "Turn on/off registering legacy cu devices");
  47
  48 module_param_named(register_prdevices, dgrp_register_prdevices, int, 0644);
  49 MODULE_PARM_DESC(register_prdevices, "Turn on/off registering transparent print devices");
  50
  51 module_param_named(pollrate, dgrp_poll_tick, int, 0644);
  52 MODULE_PARM_DESC(pollrate, "Poll interval in ms");
  53
  54 /*
  55  * init_module()
  56  *
  57  * Module load.  This is where it all starts.
  58  */
  59 static int __init dgrp_init_module(void)
  60 {
  61         int ret;
  62
  63         INIT_LIST_HEAD(&nd_struct_list);
  64
  65         spin_lock_init(&dgrp_poll_data.poll_lock);
  66         init_timer(&dgrp_poll_data.timer);
  67         dgrp_poll_data.poll_tick = dgrp_poll_tick;
  68         dgrp_poll_data.timer.function = dgrp_poll_handler;
  69         dgrp_poll_data.timer.data = (unsigned long) &dgrp_poll_data;
  70
  71         ret = dgrp_create_class_sysfs_files();
  72         if (ret)
  73                 return ret;
  74
  75         dgrp_register_proc();
  76
  77         return 0;
  78 }
  79
  80
  81 /*
  82  *      Module unload.  This is where it all ends.
  83  */
  84 static void __exit dgrp_cleanup_module(void)
  85 {
  86         struct nd_struct *nd, *next;
  87
  88         /*
  89          *      Attempting to free resources in backwards
  90          *      order of allocation, in case that helps
  91          *      memory pool fragmentation.
  92          */
  93         dgrp_unregister_proc();
  94
  95         dgrp_remove_class_sysfs_files();
  96
  97
  98         list_for_each_entry_safe(nd, next, &nd_struct_list, list) {
  99                 dgrp_tty_uninit(nd);
 100                 kfree(nd);
 101         }
 102 }
 103
 104 module_init(dgrp_init_module);
 105 module_exit(dgrp_cleanup_module);