xiaomi-wmi.c 2.5 KB

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