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 37 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 38 MODULE_DESCRIPTION("Input driver event debug module"); 39 MODULE_LICENSE("GPL"); 40 41 static 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 47 static 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 83 static 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 93 static const struct input_device_id evbug_ids[] = { 94 { .driver_info = 1 }, /* Matches all devices */ 95 { }, /* Terminating zero entry */ 96 }; 97 98 MODULE_DEVICE_TABLE(input, evbug_ids); 99 100 static 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 }; 107 108 static int __init evbug_init(void) 109 { 110 return input_register_handler(&evbug_handler); 111 } 112 113 static void __exit evbug_exit(void) 114 { 115 input_unregister_handler(&evbug_handler); 116 } 117 118 module_init(evbug_init); 119 module_exit(evbug_exit); 120