Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /drivers/platform/x86/xiaomi-wmi.c 
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
// SPDX-License-Identifier: GPL-2.0
/* WMI driver for Xiaomi Laptops */

#include <linux/acpi.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/wmi.h>

#include <uapi/linux/input-event-codes.h>

#define XIAOMI_KEY_FN_ESC_0	"A2095CCE-0491-44E7-BA27-F8ED8F88AA86"
#define XIAOMI_KEY_FN_ESC_1	"7BBE8E39-B486-473D-BA13-66F75C5805CD"
#define XIAOMI_KEY_FN_FN	"409B028D-F06B-4C7C-8BBB-EE133A6BD87E"
#define XIAOMI_KEY_CAPSLOCK	"83FE7607-053A-4644-822A-21532C621FC7"
#define XIAOMI_KEY_FN_F7	"76E9027C-95D0-4180-8692-DA6747DD1C2D"

#define XIAOMI_DEVICE(guid, key)		\
	.guid_string = (guid),			\
	.context = &(const unsigned int){key}

struct xiaomi_wmi {
	struct input_dev *input_dev;
	unsigned int key_code;
};

int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
{
	struct xiaomi_wmi *data;

	if (wdev == NULL || context == NULL)
		return -EINVAL;

	data = devm_kzalloc(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL);
	if (data == NULL)
		return -ENOMEM;
	dev_set_drvdata(&wdev->dev, data);

	data->input_dev = devm_input_allocate_device(&wdev->dev);
	if (data->input_dev == NULL)
		return -ENOMEM;
	data->input_dev->name = "Xiaomi WMI keys";
	data->input_dev->phys = "wmi/input0";

	data->key_code = *((const unsigned int *)context);
	set_bit(EV_KEY, data->input_dev->evbit);
	set_bit(data->key_code, data->input_dev->keybit);

	return input_register_device(data->input_dev);
}

void xiaomi_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
{
	struct xiaomi_wmi *data;

	if (wdev == NULL)
		return;

	data = dev_get_drvdata(&wdev->dev);
	if (data == NULL)
		return;

	input_report_key(data->input_dev, data->key_code, 1);
	input_sync(data->input_dev);
	input_report_key(data->input_dev, data->key_code, 0);
	input_sync(data->input_dev);
}

static const struct wmi_device_id xiaomi_wmi_id_table[] = {
	// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_0, KEY_FN_ESC) },
	// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_1, KEY_FN_ESC) },
	{ XIAOMI_DEVICE(XIAOMI_KEY_FN_FN, KEY_PROG1) },
	// { XIAOMI_DEVICE(XIAOMI_KEY_CAPSLOCK, KEY_CAPSLOCK) },
	{ XIAOMI_DEVICE(XIAOMI_KEY_FN_F7, KEY_CUT) },

	/* Terminating entry */
	{ }
};

static struct wmi_driver xiaomi_wmi_driver = {
	.driver = {
		.name = "xiaomi-wmi",
	},
	.id_table = xiaomi_wmi_id_table,
	.probe = xiaomi_wmi_probe,
	.notify = xiaomi_wmi_notify,
};
module_wmi_driver(xiaomi_wmi_driver);

MODULE_DEVICE_TABLE(wmi, xiaomi_wmi_id_table);
MODULE_AUTHOR("Mattias Jacobsson");
MODULE_DESCRIPTION("Xiaomi WMI driver");
MODULE_LICENSE("GPL v2");