| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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); |