linux/drivers/input/evbug.c
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   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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  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
  37MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  38MODULE_DESCRIPTION("Input driver event debug module");
  39MODULE_LICENSE("GPL");
  40
  41static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
  42{
  43        printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
  44               dev_name(&handle->dev->dev), type, code, value);
  45}
  46
  47static 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 pr_fmt("Connected device: %s (%s at %s)\n"),
  70               dev_name(&dev->dev),
  71               dev->name ?: "unknown",
  72               dev->phys ?: "unknown");
  73
  74        return 0;
  75
  76 err_unregister_handle:
  77        input_unregister_handle(handle);
  78 err_free_handle:
  79        kfree(handle);
  80        return error;
  81}
  82
  83static void evbug_disconnect(struct input_handle *handle)
  84{
  85        printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
  86               dev_name(&handle->dev->dev));
  87
  88        input_close_device(handle);
  89        input_unregister_handle(handle);
  90        kfree(handle);
  91}
  92
  93static const struct input_device_id evbug_ids[] = {
  94        { .driver_info = 1 },   /* Matches all devices */
  95        { },                    /* Terminating zero entry */
  96};
  97
  98MODULE_DEVICE_TABLE(input, evbug_ids);
  99
 100static struct input_handler evbug_handler = {
 101        .event =        evbug_event,
 102        .connect =      evbug_connect,
 103        .disconnect =   evbug_disconnect,
 104        .name =         "evbug",
 105        .id_table =     evbug_ids,
 106};
 107
 108static int __init evbug_init(void)
 109{
 110        return input_register_handler(&evbug_handler);
 111}
 112
 113static void __exit evbug_exit(void)
 114{
 115        input_unregister_handler(&evbug_handler);
 116}
 117
 118module_init(evbug_init);
 119module_exit(evbug_exit);
 120
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