1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* WMI driver for Xiaomi Laptops */ |
3 | |
4 | #include <linux/acpi.h> |
5 | #include <linux/input.h> |
6 | #include <linux/module.h> |
7 | #include <linux/wmi.h> |
8 | |
9 | #include <uapi/linux/input-event-codes.h> |
10 | |
11 | #define XIAOMI_KEY_FN_ESC_0 "A2095CCE-0491-44E7-BA27-F8ED8F88AA86" |
12 | #define XIAOMI_KEY_FN_ESC_1 "7BBE8E39-B486-473D-BA13-66F75C5805CD" |
13 | #define XIAOMI_KEY_FN_FN "409B028D-F06B-4C7C-8BBB-EE133A6BD87E" |
14 | #define XIAOMI_KEY_CAPSLOCK "83FE7607-053A-4644-822A-21532C621FC7" |
15 | #define XIAOMI_KEY_FN_F7 "76E9027C-95D0-4180-8692-DA6747DD1C2D" |
16 | |
17 | #define XIAOMI_DEVICE(guid, key) \ |
18 | .guid_string = (guid), \ |
19 | .context = &(const unsigned int){key} |
20 | |
21 | struct xiaomi_wmi { |
22 | struct input_dev *input_dev; |
23 | unsigned int key_code; |
24 | }; |
25 | |
26 | static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context) |
27 | { |
28 | struct xiaomi_wmi *data; |
29 | |
30 | if (wdev == NULL || context == NULL) |
31 | return -EINVAL; |
32 | |
33 | data = devm_kzalloc(dev: &wdev->dev, size: sizeof(struct xiaomi_wmi), GFP_KERNEL); |
34 | if (data == NULL) |
35 | return -ENOMEM; |
36 | dev_set_drvdata(dev: &wdev->dev, data); |
37 | |
38 | data->input_dev = devm_input_allocate_device(&wdev->dev); |
39 | if (data->input_dev == NULL) |
40 | return -ENOMEM; |
41 | data->input_dev->name = "Xiaomi WMI keys" ; |
42 | data->input_dev->phys = "wmi/input0" ; |
43 | |
44 | data->key_code = *((const unsigned int *)context); |
45 | set_bit(EV_KEY, addr: data->input_dev->evbit); |
46 | set_bit(nr: data->key_code, addr: data->input_dev->keybit); |
47 | |
48 | return input_register_device(data->input_dev); |
49 | } |
50 | |
51 | static void xiaomi_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy) |
52 | { |
53 | struct xiaomi_wmi *data; |
54 | |
55 | if (wdev == NULL) |
56 | return; |
57 | |
58 | data = dev_get_drvdata(dev: &wdev->dev); |
59 | if (data == NULL) |
60 | return; |
61 | |
62 | input_report_key(dev: data->input_dev, code: data->key_code, value: 1); |
63 | input_sync(dev: data->input_dev); |
64 | input_report_key(dev: data->input_dev, code: data->key_code, value: 0); |
65 | input_sync(dev: data->input_dev); |
66 | } |
67 | |
68 | static const struct wmi_device_id xiaomi_wmi_id_table[] = { |
69 | // { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_0, KEY_FN_ESC) }, |
70 | // { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_1, KEY_FN_ESC) }, |
71 | { XIAOMI_DEVICE(XIAOMI_KEY_FN_FN, KEY_PROG1) }, |
72 | // { XIAOMI_DEVICE(XIAOMI_KEY_CAPSLOCK, KEY_CAPSLOCK) }, |
73 | { XIAOMI_DEVICE(XIAOMI_KEY_FN_F7, KEY_CUT) }, |
74 | |
75 | /* Terminating entry */ |
76 | { } |
77 | }; |
78 | |
79 | static struct wmi_driver xiaomi_wmi_driver = { |
80 | .driver = { |
81 | .name = "xiaomi-wmi" , |
82 | }, |
83 | .id_table = xiaomi_wmi_id_table, |
84 | .probe = xiaomi_wmi_probe, |
85 | .notify = xiaomi_wmi_notify, |
86 | }; |
87 | module_wmi_driver(xiaomi_wmi_driver); |
88 | |
89 | MODULE_DEVICE_TABLE(wmi, xiaomi_wmi_id_table); |
90 | MODULE_AUTHOR("Mattias Jacobsson" ); |
91 | MODULE_DESCRIPTION("Xiaomi WMI driver" ); |
92 | MODULE_LICENSE("GPL v2" ); |
93 | |