1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) 1999-2001 Vojtech Pavlik
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun /*
7*4882a593Smuzhiyun * Input driver event debug module - dumps all events into syslog
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun /*
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include <linux/slab.h>
16*4882a593Smuzhiyun #include <linux/module.h>
17*4882a593Smuzhiyun #include <linux/input.h>
18*4882a593Smuzhiyun #include <linux/init.h>
19*4882a593Smuzhiyun #include <linux/device.h>
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
22*4882a593Smuzhiyun MODULE_DESCRIPTION("Input driver event debug module");
23*4882a593Smuzhiyun MODULE_LICENSE("GPL");
24*4882a593Smuzhiyun
evbug_event(struct input_handle * handle,unsigned int type,unsigned int code,int value)25*4882a593Smuzhiyun static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
28*4882a593Smuzhiyun dev_name(&handle->dev->dev), type, code, value);
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
evbug_connect(struct input_handler * handler,struct input_dev * dev,const struct input_device_id * id)31*4882a593Smuzhiyun static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
32*4882a593Smuzhiyun const struct input_device_id *id)
33*4882a593Smuzhiyun {
34*4882a593Smuzhiyun struct input_handle *handle;
35*4882a593Smuzhiyun int error;
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
38*4882a593Smuzhiyun if (!handle)
39*4882a593Smuzhiyun return -ENOMEM;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun handle->dev = dev;
42*4882a593Smuzhiyun handle->handler = handler;
43*4882a593Smuzhiyun handle->name = "evbug";
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun error = input_register_handle(handle);
46*4882a593Smuzhiyun if (error)
47*4882a593Smuzhiyun goto err_free_handle;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun error = input_open_device(handle);
50*4882a593Smuzhiyun if (error)
51*4882a593Smuzhiyun goto err_unregister_handle;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),
54*4882a593Smuzhiyun dev_name(&dev->dev),
55*4882a593Smuzhiyun dev->name ?: "unknown",
56*4882a593Smuzhiyun dev->phys ?: "unknown");
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun err_unregister_handle:
61*4882a593Smuzhiyun input_unregister_handle(handle);
62*4882a593Smuzhiyun err_free_handle:
63*4882a593Smuzhiyun kfree(handle);
64*4882a593Smuzhiyun return error;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
evbug_disconnect(struct input_handle * handle)67*4882a593Smuzhiyun static void evbug_disconnect(struct input_handle *handle)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
70*4882a593Smuzhiyun dev_name(&handle->dev->dev));
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun input_close_device(handle);
73*4882a593Smuzhiyun input_unregister_handle(handle);
74*4882a593Smuzhiyun kfree(handle);
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun static const struct input_device_id evbug_ids[] = {
78*4882a593Smuzhiyun { .driver_info = 1 }, /* Matches all devices */
79*4882a593Smuzhiyun { }, /* Terminating zero entry */
80*4882a593Smuzhiyun };
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun MODULE_DEVICE_TABLE(input, evbug_ids);
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun static struct input_handler evbug_handler = {
85*4882a593Smuzhiyun .event = evbug_event,
86*4882a593Smuzhiyun .connect = evbug_connect,
87*4882a593Smuzhiyun .disconnect = evbug_disconnect,
88*4882a593Smuzhiyun .name = "evbug",
89*4882a593Smuzhiyun .id_table = evbug_ids,
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun
evbug_init(void)92*4882a593Smuzhiyun static int __init evbug_init(void)
93*4882a593Smuzhiyun {
94*4882a593Smuzhiyun return input_register_handler(&evbug_handler);
95*4882a593Smuzhiyun }
96*4882a593Smuzhiyun
evbug_exit(void)97*4882a593Smuzhiyun static void __exit evbug_exit(void)
98*4882a593Smuzhiyun {
99*4882a593Smuzhiyun input_unregister_handler(&evbug_handler);
100*4882a593Smuzhiyun }
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun module_init(evbug_init);
103*4882a593Smuzhiyun module_exit(evbug_exit);
104