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