// SPDX-License-Identifier: GPL-2.0-or-later/* *  Copyright (c) 1999-2001 Vojtech Pavlik */ /* *  Input driver event debug module - dumps all events into syslog */ /* */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/slab.h>#include <linux/module.h>#include <linux/input.h>#include <linux/init.h>#include <linux/device.h> MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");MODULE_DESCRIPTION("Input driver event debug module");MODULE_LICENSE("GPL"); static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value){	printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),	       dev_name(&handle->dev->dev), type, code, value);} static int evbug_connect(struct input_handler *handler, struct input_dev *dev,			 const struct input_device_id *id){	struct input_handle *handle;	int error; 	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);	if (!handle)		return -ENOMEM; 	handle->dev = dev;	handle->handler = handler;	handle->name = "evbug"; 	error = input_register_handle(handle);	if (error)		goto err_free_handle; 	error = input_open_device(handle);	if (error)		goto err_unregister_handle; 	printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),	       dev_name(&dev->dev),	       dev->name ?: "unknown",	       dev->phys ?: "unknown"); 	return 0;  err_unregister_handle:	input_unregister_handle(handle); err_free_handle:	kfree(handle);	return error;} static void evbug_disconnect(struct input_handle *handle){	printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),	       dev_name(&handle->dev->dev)); 	input_close_device(handle);	input_unregister_handle(handle);	kfree(handle);} static const struct input_device_id evbug_ids[] = {	{ .driver_info = 1 },	/* Matches all devices */	{ },			/* Terminating zero entry */}; MODULE_DEVICE_TABLE(input, evbug_ids); static struct input_handler evbug_handler = {	.event =	evbug_event,	.connect =	evbug_connect,	.disconnect =	evbug_disconnect,	.name =		"evbug",	.id_table =	evbug_ids,}; static int __init evbug_init(void){	return input_register_handler(&evbug_handler);} static void __exit evbug_exit(void){	input_unregister_handler(&evbug_handler);} module_init(evbug_init);module_exit(evbug_exit);