Thomas Gleixner | 1a59d1b8 | 2019-05-27 08:55:05 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Copyright (c) 1999-2001 Vojtech Pavlik |
| 4 | */ |
| 5 | |
| 6 | /* |
| 7 | * Input driver event debug module - dumps all events into syslog |
| 8 | */ |
| 9 | |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/slab.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/input.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/device.h> |
| 17 | |
| 18 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| 19 | MODULE_DESCRIPTION("Input driver event debug module"); |
| 20 | MODULE_LICENSE("GPL"); |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) |
| 23 | { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 24 | printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"), |
| 25 | dev_name(&handle->dev->dev), type, code, value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | } |
| 27 | |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 28 | static int evbug_connect(struct input_handler *handler, struct input_dev *dev, |
| 29 | const struct input_device_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | { |
| 31 | struct input_handle *handle; |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 32 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 34 | handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL); |
| 35 | if (!handle) |
| 36 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | handle->dev = dev; |
| 39 | handle->handler = handler; |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 40 | handle->name = "evbug"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 42 | error = input_register_handle(handle); |
| 43 | if (error) |
| 44 | goto err_free_handle; |
| 45 | |
| 46 | error = input_open_device(handle); |
| 47 | if (error) |
| 48 | goto err_unregister_handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 50 | printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"), |
| 51 | dev_name(&dev->dev), |
| 52 | dev->name ?: "unknown", |
| 53 | dev->phys ?: "unknown"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 55 | return 0; |
| 56 | |
| 57 | err_unregister_handle: |
| 58 | input_unregister_handle(handle); |
| 59 | err_free_handle: |
| 60 | kfree(handle); |
| 61 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | } |
| 63 | |
| 64 | static void evbug_disconnect(struct input_handle *handle) |
| 65 | { |
Joe Perches | da0c490 | 2010-11-29 23:33:07 -0800 | [diff] [blame] | 66 | printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"), |
| 67 | dev_name(&handle->dev->dev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | input_close_device(handle); |
Dmitry Torokhov | 5b2a0826 | 2007-04-12 01:29:46 -0400 | [diff] [blame] | 70 | input_unregister_handle(handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | kfree(handle); |
| 72 | } |
| 73 | |
Dmitry Torokhov | 66e6611 | 2006-09-14 01:31:59 -0400 | [diff] [blame] | 74 | static const struct input_device_id evbug_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { .driver_info = 1 }, /* Matches all devices */ |
| 76 | { }, /* Terminating zero entry */ |
| 77 | }; |
| 78 | |
| 79 | MODULE_DEVICE_TABLE(input, evbug_ids); |
| 80 | |
| 81 | static struct input_handler evbug_handler = { |
| 82 | .event = evbug_event, |
| 83 | .connect = evbug_connect, |
| 84 | .disconnect = evbug_disconnect, |
| 85 | .name = "evbug", |
| 86 | .id_table = evbug_ids, |
| 87 | }; |
| 88 | |
| 89 | static int __init evbug_init(void) |
| 90 | { |
Dmitry Torokhov | 4263cf0 | 2006-09-14 01:32:39 -0400 | [diff] [blame] | 91 | return input_register_handler(&evbug_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | static void __exit evbug_exit(void) |
| 95 | { |
| 96 | input_unregister_handler(&evbug_handler); |
| 97 | } |
| 98 | |
| 99 | module_init(evbug_init); |
| 100 | module_exit(evbug_exit); |