123 lines
2.6 KiB
C
123 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Airplane mode button for AMD, HP & Xiaomi laptops
|
|
*
|
|
* Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com>
|
|
* Copyright (C) 2021 Advanced Micro Devices
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/input.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/acpi.h>
|
|
#include <acpi/acpi_bus.h>
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Alex Hung");
|
|
MODULE_ALIAS("acpi*:HPQ6001:*");
|
|
MODULE_ALIAS("acpi*:WSTADEF:*");
|
|
MODULE_ALIAS("acpi*:AMDI0051:*");
|
|
|
|
struct wl_button {
|
|
struct input_dev *input_dev;
|
|
char phys[32];
|
|
};
|
|
|
|
static const struct acpi_device_id wl_ids[] = {
|
|
{"HPQ6001", 0},
|
|
{"WSTADEF", 0},
|
|
{"AMDI0051", 0},
|
|
{"", 0},
|
|
};
|
|
|
|
static int wireless_input_setup(struct acpi_device *device)
|
|
{
|
|
struct wl_button *button = acpi_driver_data(device);
|
|
int err;
|
|
|
|
button->input_dev = input_allocate_device();
|
|
if (!button->input_dev)
|
|
return -ENOMEM;
|
|
|
|
snprintf(button->phys, sizeof(button->phys), "%s/input0", acpi_device_hid(device));
|
|
|
|
button->input_dev->name = "Wireless hotkeys";
|
|
button->input_dev->phys = button->phys;
|
|
button->input_dev->id.bustype = BUS_HOST;
|
|
button->input_dev->evbit[0] = BIT(EV_KEY);
|
|
set_bit(KEY_RFKILL, button->input_dev->keybit);
|
|
|
|
err = input_register_device(button->input_dev);
|
|
if (err)
|
|
goto err_free_dev;
|
|
|
|
return 0;
|
|
|
|
err_free_dev:
|
|
input_free_device(button->input_dev);
|
|
return err;
|
|
}
|
|
|
|
static void wireless_input_destroy(struct acpi_device *device)
|
|
{
|
|
struct wl_button *button = acpi_driver_data(device);
|
|
|
|
input_unregister_device(button->input_dev);
|
|
kfree(button);
|
|
}
|
|
|
|
static void wl_notify(struct acpi_device *acpi_dev, u32 event)
|
|
{
|
|
struct wl_button *button = acpi_driver_data(acpi_dev);
|
|
|
|
if (event != 0x80) {
|
|
pr_info("Received unknown event (0x%x)\n", event);
|
|
return;
|
|
}
|
|
|
|
input_report_key(button->input_dev, KEY_RFKILL, 1);
|
|
input_sync(button->input_dev);
|
|
input_report_key(button->input_dev, KEY_RFKILL, 0);
|
|
input_sync(button->input_dev);
|
|
}
|
|
|
|
static int wl_add(struct acpi_device *device)
|
|
{
|
|
struct wl_button *button;
|
|
int err;
|
|
|
|
button = kzalloc(sizeof(struct wl_button), GFP_KERNEL);
|
|
if (!button)
|
|
return -ENOMEM;
|
|
|
|
device->driver_data = button;
|
|
|
|
err = wireless_input_setup(device);
|
|
if (err) {
|
|
pr_err("Failed to setup wireless hotkeys\n");
|
|
kfree(button);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void wl_remove(struct acpi_device *device)
|
|
{
|
|
wireless_input_destroy(device);
|
|
}
|
|
|
|
static struct acpi_driver wl_driver = {
|
|
.name = "wireless-hotkey",
|
|
.owner = THIS_MODULE,
|
|
.ids = wl_ids,
|
|
.ops = {
|
|
.add = wl_add,
|
|
.remove = wl_remove,
|
|
.notify = wl_notify,
|
|
},
|
|
};
|
|
|
|
module_acpi_driver(wl_driver);
|