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