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