mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-08-29 15:06:30 -04:00
2e2a39149f
WMI drivers using the buffer-based WMI API are expected to reject undersized event payloads. Extend the WMI driver core to allow such drivers to specify their minimum supported event payload size. Also remove the now redundant .no_notify_data field. Signed-off-by: Armin Wolf <W_Armin@gmx.de> Link: https://patch.msgid.link/20260406203237.2970-7-W_Armin@gmx.de Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* WMI driver for Xiaomi Laptops */
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/input.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/wmi.h>
|
|
|
|
#include <uapi/linux/input-event-codes.h>
|
|
|
|
#define XIAOMI_KEY_FN_ESC_0 "A2095CCE-0491-44E7-BA27-F8ED8F88AA86"
|
|
#define XIAOMI_KEY_FN_ESC_1 "7BBE8E39-B486-473D-BA13-66F75C5805CD"
|
|
#define XIAOMI_KEY_FN_FN "409B028D-F06B-4C7C-8BBB-EE133A6BD87E"
|
|
#define XIAOMI_KEY_CAPSLOCK "83FE7607-053A-4644-822A-21532C621FC7"
|
|
#define XIAOMI_KEY_FN_F7 "76E9027C-95D0-4180-8692-DA6747DD1C2D"
|
|
|
|
#define XIAOMI_DEVICE(guid, key) \
|
|
.guid_string = (guid), \
|
|
.context = &(const unsigned int){key}
|
|
|
|
struct xiaomi_wmi {
|
|
struct input_dev *input_dev;
|
|
struct mutex key_lock; /* Protects the key event sequence */
|
|
unsigned int key_code;
|
|
};
|
|
|
|
static int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
|
|
{
|
|
struct xiaomi_wmi *data;
|
|
int ret;
|
|
|
|
if (!context)
|
|
return -EINVAL;
|
|
|
|
data = devm_kzalloc(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
dev_set_drvdata(&wdev->dev, data);
|
|
|
|
ret = devm_mutex_init(&wdev->dev, &data->key_lock);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
data->input_dev = devm_input_allocate_device(&wdev->dev);
|
|
if (data->input_dev == NULL)
|
|
return -ENOMEM;
|
|
data->input_dev->name = "Xiaomi WMI keys";
|
|
data->input_dev->phys = "wmi/input0";
|
|
|
|
data->key_code = *((const unsigned int *)context);
|
|
set_bit(EV_KEY, data->input_dev->evbit);
|
|
set_bit(data->key_code, data->input_dev->keybit);
|
|
|
|
return input_register_device(data->input_dev);
|
|
}
|
|
|
|
static void xiaomi_wmi_notify(struct wmi_device *wdev, const struct wmi_buffer *dummy)
|
|
{
|
|
struct xiaomi_wmi *data = dev_get_drvdata(&wdev->dev);
|
|
|
|
mutex_lock(&data->key_lock);
|
|
input_report_key(data->input_dev, data->key_code, 1);
|
|
input_sync(data->input_dev);
|
|
input_report_key(data->input_dev, data->key_code, 0);
|
|
input_sync(data->input_dev);
|
|
mutex_unlock(&data->key_lock);
|
|
}
|
|
|
|
static const struct wmi_device_id xiaomi_wmi_id_table[] = {
|
|
// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_0, KEY_FN_ESC) },
|
|
// { XIAOMI_DEVICE(XIAOMI_KEY_FN_ESC_1, KEY_FN_ESC) },
|
|
{ XIAOMI_DEVICE(XIAOMI_KEY_FN_FN, KEY_PROG1) },
|
|
// { XIAOMI_DEVICE(XIAOMI_KEY_CAPSLOCK, KEY_CAPSLOCK) },
|
|
{ XIAOMI_DEVICE(XIAOMI_KEY_FN_F7, KEY_CUT) },
|
|
|
|
/* Terminating entry */
|
|
{ }
|
|
};
|
|
|
|
static struct wmi_driver xiaomi_wmi_driver = {
|
|
.driver = {
|
|
.name = "xiaomi-wmi",
|
|
},
|
|
.id_table = xiaomi_wmi_id_table,
|
|
.min_event_size = 0,
|
|
.probe = xiaomi_wmi_probe,
|
|
.notify_new = xiaomi_wmi_notify,
|
|
.no_singleton = true,
|
|
};
|
|
module_wmi_driver(xiaomi_wmi_driver);
|
|
|
|
MODULE_DEVICE_TABLE(wmi, xiaomi_wmi_id_table);
|
|
MODULE_AUTHOR("Mattias Jacobsson");
|
|
MODULE_DESCRIPTION("Xiaomi WMI driver");
|
|
MODULE_LICENSE("GPL v2");
|