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(&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 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(&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"); 93