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 | |
33 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>" ); |
34 | MODULE_DESCRIPTION("Input driver event debug module" ); |
35 | MODULE_LICENSE("GPL" ); |
36 | |
37 | static 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 | |
43 | static 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 | |
79 | static 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 | |
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); |
116 | |