Commit edb73f4f authored by Mattias Jacobsson's avatar Mattias Jacobsson Committed by Andy Shevchenko

platform/x86: wmi: add Xiaomi WMI key driver

Some function keys on the built in keyboard on Xiaomi's notebooks does
not produce any key events when pressed in combination with the function
key. Some of these keys do report that they are being pressed via WMI
events.

This driver reports key events for Fn+F7 and double tap on Fn.

Other WMI events that are reported by the hardware but not utilized by
this driver are Caps Lock(which already work) and Fn lock/unlock.
Signed-off-by: default avatarMattias Jacobsson <2pi@mok.nu>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 440c4983
...@@ -780,6 +780,16 @@ config INTEL_WMI_THUNDERBOLT ...@@ -780,6 +780,16 @@ config INTEL_WMI_THUNDERBOLT
To compile this driver as a module, choose M here: the module will To compile this driver as a module, choose M here: the module will
be called intel-wmi-thunderbolt. be called intel-wmi-thunderbolt.
config XIAOMI_WMI
tristate "Xiaomi WMI key driver"
depends on ACPI_WMI
depends on INPUT
help
Say Y here if you want to support WMI-based keys on Xiaomi notebooks.
To compile this driver as a module, choose M here: the module will
be called xiaomi-wmi.
config MSI_WMI config MSI_WMI
tristate "MSI WMI extras" tristate "MSI WMI extras"
depends on ACPI_WMI depends on ACPI_WMI
......
...@@ -51,6 +51,7 @@ obj-$(CONFIG_SURFACE3_WMI) += surface3-wmi.o ...@@ -51,6 +51,7 @@ obj-$(CONFIG_SURFACE3_WMI) += surface3-wmi.o
obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o
obj-$(CONFIG_WMI_BMOF) += wmi-bmof.o obj-$(CONFIG_WMI_BMOF) += wmi-bmof.o
obj-$(CONFIG_INTEL_WMI_THUNDERBOLT) += intel-wmi-thunderbolt.o obj-$(CONFIG_INTEL_WMI_THUNDERBOLT) += intel-wmi-thunderbolt.o
obj-$(CONFIG_XIAOMI_WMI) += xiaomi-wmi.o
# toshiba_acpi must link after wmi to ensure that wmi devices are found # toshiba_acpi must link after wmi to ensure that wmi devices are found
# before toshiba_acpi initializes # before toshiba_acpi initializes
......
// SPDX-License-Identifier: GPL-2.0
/* WMI driver for Xiaomi Laptops */
#include <linux/acpi.h>
#include <linux/input.h>
#include <linux/module.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;
unsigned int key_code;
};
int xiaomi_wmi_probe(struct wmi_device *wdev, const void *context)
{
struct xiaomi_wmi *data;
if (wdev == NULL || context == NULL)
return -EINVAL;
data = devm_kzalloc(&wdev->dev, sizeof(struct xiaomi_wmi), GFP_KERNEL);
if (data == NULL)
return -ENOMEM;
dev_set_drvdata(&wdev->dev, data);
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);
}
void xiaomi_wmi_notify(struct wmi_device *wdev, union acpi_object *dummy)
{
struct xiaomi_wmi *data;
if (wdev == NULL)
return;
data = dev_get_drvdata(&wdev->dev);
if (data == NULL)
return;
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);
}
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,
.probe = xiaomi_wmi_probe,
.notify = xiaomi_wmi_notify,
};
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");
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