drivers/input/evbug.c

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