| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 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 | 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(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL); |
| 34 | if (data == NULL) |
| 35 | return -ENOMEM; |
| 36 | dev_set_drvdata(&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, data->input_dev->evbit); |
| 46 | set_bit(data->key_code, data->input_dev->keybit); |
| 47 | |
| 48 | return input_register_device(data->input_dev); |
| 49 | } |
| 50 | |
| 51 | 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(&wdev->dev); |
| 59 | if (data == NULL) |
| 60 | return; |
| 61 | |
| 62 | input_report_key(data->input_dev, data->key_code, 1); |
| 63 | input_sync(data->input_dev); |
| 64 | input_report_key(data->input_dev, data->key_code, 0); |
| 65 | input_sync(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"); |