// SPDX-License-Identifier: GPL-2.0
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/* WMI driver for Xiaomi Laptops */
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#include <linux/acpi.h>
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/wmi.h>
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#include <uapi/linux/input-event-codes.h>
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#define XIAOMI_KEY_FN_ESC_0 "A2095CCE-0491-44E7-BA27-F8ED8F88AA86"
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#define XIAOMI_KEY_FN_ESC_1 "7BBE8E39-B486-473D-BA13-66F75C5805CD"
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#define XIAOMI_KEY_FN_FN "409B028D-F06B-4C7C-8BBB-EE133A6BD87E"
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#define XIAOMI_KEY_CAPSLOCK "83FE7607-053A-4644-822A-21532C621FC7"
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#define XIAOMI_KEY_FN_F7 "76E9027C-95D0-4180-8692-DA6747DD1C2D"
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#define XIAOMI_DEVICE(guid, key) \
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.guid_string = (guid), \
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.context = &(const unsigned int){key}
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struct xiaomi_wmi {
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struct input_dev *input_dev;
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unsigned int key_code;
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};
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static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
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{
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struct xiaomi_wmi *data;
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if (wdev == NULL || context == NULL)
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return -EINVAL;
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data = devm_kzalloc(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL);
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if (data == NULL)
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return -ENOMEM;
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dev_set_drvdata(&wdev->dev, data);
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data->input_dev = devm_input_allocate_device(&wdev->dev);
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if (data->input_dev == NULL)
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return -ENOMEM;
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data->input_dev->name = "Xiaomi WMI keys";
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data->input_dev->phys = "wmi/input0";
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data->key_code = *((const unsigned int *)context);
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set_bit(EV_KEY, data->input_dev->evbit);
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set_bit(data->key_code, data->input_dev->keybit);
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return input_register_device(data->input_dev);
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}
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static void xiaomi_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
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{
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struct xiaomi_wmi *data;
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if (wdev == NULL)
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return;
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data = dev_get_drvdata(&wdev->dev);
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if (data == NULL)
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return;
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input_report_key(data->input_dev, data->key_code, 1);
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input_sync(data->input_dev);
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input_report_key(data->input_dev, data->key_code, 0);
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input_sync(data->input_dev);
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}
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static const struct wmi_device_id xiaomi_wmi_id_table[] = {
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// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_0, KEY_FN_ESC) },
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// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_1, KEY_FN_ESC) },
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{ XIAOMI_DEVICE(XIAOMI_KEY_FN_FN, KEY_PROG1) },
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// { XIAOMI_DEVICE(XIAOMI_KEY_CAPSLOCK, KEY_CAPSLOCK) },
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{ XIAOMI_DEVICE(XIAOMI_KEY_FN_F7, KEY_CUT) },
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/* Terminating entry */
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{ }
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};
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static struct wmi_driver xiaomi_wmi_driver = {
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.driver = {
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.name = "xiaomi-wmi",
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},
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.id_table = xiaomi_wmi_id_table,
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.probe = xiaomi_wmi_probe,
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.notify = xiaomi_wmi_notify,
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};
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module_wmi_driver(xiaomi_wmi_driver);
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MODULE_DEVICE_TABLE(wmi, xiaomi_wmi_id_table);
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MODULE_AUTHOR("Mattias Jacobsson");
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MODULE_DESCRIPTION("Xiaomi WMI driver");
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MODULE_LICENSE("GPL v2");
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