drivers/input/evbug.c

   1 /*
   2  * $Id: evbug.c,v 1.10 2001/09/25 10:12:07 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  *  Input driver event debug module - dumps all events into syslog
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  * Should you need to contact me, the author, you can do so either by
  27  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  28  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  29  */
  30
  31 #include <linux/slab.h>
  32 #include <linux/module.h>
  33 #include <linux/input.h>
  34 #include <linux/init.h>
  35 #include <linux/device.h>
  36
  37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  38 MODULE_DESCRIPTION("Input driver event debug module");
  39 MODULE_LICENSE("GPL");
  40
  41 static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
  42 {
  43         printk(KERN_DEBUG "evbug.c: Event. Dev: %s, Type: %d, Code: %d, Value: %d\n",
  44                 handle->dev->phys, type, code, value);
  45 }
  46
  47 static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
  48                          const struct input_device_id *id)
  49 {
  50         struct input_handle *handle;
  51         int error;
  52
  53         handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
  54         if (!handle)
  55                 return -ENOMEM;
  56
  57         handle->dev = dev;
  58         handle->handler = handler;
  59         handle->name = "evbug";
  60
  61         error = input_register_handle(handle);
  62         if (error)
  63                 goto err_free_handle;
  64
  65         error = input_open_device(handle);
  66         if (error)
  67                 goto err_unregister_handle;
  68
  69         printk(KERN_DEBUG "evbug.c: Connected device: \"%s\", %s\n", dev->name, dev->phys);
  70
  71         return 0;
  72
  73  err_unregister_handle:
  74         input_unregister_handle(handle);
  75  err_free_handle:
  76         kfree(handle);
  77         return error;
  78 }
  79
  80 static void evbug_disconnect(struct input_handle *handle)
  81 {
  82         printk(KERN_DEBUG "evbug.c: Disconnected device: %s\n", handle->dev->phys);
  83
  84         input_close_device(handle);
  85         input_unregister_handle(handle);
  86         kfree(handle);
  87 }
  88
  89 static const struct input_device_id evbug_ids[] = {
  90         { .driver_info = 1 },   /* Matches all devices */
  91         { },                    /* Terminating zero entry */
  92 };
  93
  94 MODULE_DEVICE_TABLE(input, evbug_ids);
  95
  96 static struct input_handler evbug_handler = {
  97         .event =        evbug_event,
  98         .connect =      evbug_connect,
  99         .disconnect =   evbug_disconnect,
 100         .name =         "evbug",
 101         .id_table =     evbug_ids,
 102 };
 103
 104 static int __init evbug_init(void)
 105 {
 106         return input_register_handler(&evbug_handler);
 107 }
 108
 109 static void __exit evbug_exit(void)
 110 {
 111         input_unregister_handler(&evbug_handler);
 112 }
 113
 114 module_init(evbug_init);
 115 module_exit(evbug_exit);