LXR linux/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
  25#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27#include <linux/slab.h>
  28#include <linux/module.h>
  29#include <linux/input.h>
  30#include <linux/init.h>
  31#include <linux/device.h>
  32
  33MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  34MODULE_DESCRIPTION("Input driver event debug module");
  35MODULE_LICENSE("GPL");
  36
  37static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
  38{
  39        printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
  40               dev_name(&handle->dev->dev), type, code, value);
  41}
  42
  43static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
  44                         const struct input_device_id *id)
  45{
  46        struct input_handle *handle;
  47        int error;
  48
  49        handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
  50        if (!handle)
  51                return -ENOMEM;
  52
  53        handle->dev = dev;
  54        handle->handler = handler;
  55        handle->name = "evbug";
  56
  57        error = input_register_handle(handle);
  58        if (error)
  59                goto err_free_handle;
  60
  61        error = input_open_device(handle);
  62        if (error)
  63                goto err_unregister_handle;
  64
  65        printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),
  66               dev_name(&dev->dev),
  67               dev->name ?: "unknown",
  68               dev->phys ?: "unknown");
  69
  70        return 0;
  71
  72 err_unregister_handle:
  73        input_unregister_handle(handle);
  74 err_free_handle:
  75        kfree(handle);
  76        return error;
  77}
  78
  79static void evbug_disconnect(struct input_handle *handle)
  80{
  81        printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
  82               dev_name(&handle->dev->dev));
  83
  84        input_close_device(handle);
  85        input_unregister_handle(handle);
  86        kfree(handle);
  87}
  88
  89static const struct input_device_id evbug_ids[] = {
  90        { .driver_info = 1 },   /* Matches all devices */
  91        { },                    /* Terminating zero entry */
  92};
  93
  94MODULE_DEVICE_TABLE(input, evbug_ids);
  95
  96static 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
 104static int __init evbug_init(void)
 105{
 106        return input_register_handler(&evbug_handler);
 107}
 108
 109static void __exit evbug_exit(void)
 110{
 111        input_unregister_handler(&evbug_handler);
 112}
 113
 114module_init(evbug_init);
 115module_exit(evbug_exit);
 116