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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Airplane mode button for AMD, HP & Xiaomi laptops
4 *
5 * Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com>
6 * Copyright (C) 2021 Advanced Micro Devices
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/input.h>
13#include <linux/platform_device.h>
14#include <linux/acpi.h>
15#include <acpi/acpi_bus.h>
16
17MODULE_LICENSE("GPL");
18MODULE_AUTHOR("Alex Hung");
19MODULE_ALIAS("acpi*:HPQ6001:*");
20MODULE_ALIAS("acpi*:WSTADEF:*");
21MODULE_ALIAS("acpi*:AMDI0051:*");
22
23struct wl_button {
24 struct input_dev *input_dev;
25 char phys[32];
26};
27
28static const struct acpi_device_id wl_ids[] = {
29 {"HPQ6001", 0},
30 {"WSTADEF", 0},
31 {"AMDI0051", 0},
32 {"", 0},
33};
34
35static int wireless_input_setup(struct acpi_device *device)
36{
37 struct wl_button *button = acpi_driver_data(device);
38 int err;
39
40 button->input_dev = input_allocate_device();
41 if (!button->input_dev)
42 return -ENOMEM;
43
44 snprintf(button->phys, sizeof(button->phys), "%s/input0", acpi_device_hid(device));
45
46 button->input_dev->name = "Wireless hotkeys";
47 button->input_dev->phys = button->phys;
48 button->input_dev->id.bustype = BUS_HOST;
49 button->input_dev->evbit[0] = BIT(EV_KEY);
50 set_bit(KEY_RFKILL, button->input_dev->keybit);
51
52 err = input_register_device(button->input_dev);
53 if (err)
54 goto err_free_dev;
55
56 return 0;
57
58err_free_dev:
59 input_free_device(button->input_dev);
60 return err;
61}
62
63static void wireless_input_destroy(struct acpi_device *device)
64{
65 struct wl_button *button = acpi_driver_data(device);
66
67 input_unregister_device(button->input_dev);
68 kfree(button);
69}
70
71static void wl_notify(struct acpi_device *acpi_dev, u32 event)
72{
73 struct wl_button *button = acpi_driver_data(acpi_dev);
74
75 if (event != 0x80) {
76 pr_info("Received unknown event (0x%x)\n", event);
77 return;
78 }
79
80 input_report_key(button->input_dev, KEY_RFKILL, 1);
81 input_sync(button->input_dev);
82 input_report_key(button->input_dev, KEY_RFKILL, 0);
83 input_sync(button->input_dev);
84}
85
86static int wl_add(struct acpi_device *device)
87{
88 struct wl_button *button;
89 int err;
90
91 button = kzalloc(sizeof(struct wl_button), GFP_KERNEL);
92 if (!button)
93 return -ENOMEM;
94
95 device->driver_data = button;
96
97 err = wireless_input_setup(device);
98 if (err) {
99 pr_err("Failed to setup wireless hotkeys\n");
100 kfree(button);
101 }
102
103 return err;
104}
105
106static void wl_remove(struct acpi_device *device)
107{
108 wireless_input_destroy(device);
109}
110
111static struct acpi_driver wl_driver = {
112 .name = "wireless-hotkey",
113 .owner = THIS_MODULE,
114 .ids = wl_ids,
115 .ops = {
116 .add = wl_add,
117 .remove = wl_remove,
118 .notify = wl_notify,
119 },
120};
121
122module_acpi_driver(wl_driver);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Airplane mode button for AMD, HP & Xiaomi laptops
4 *
5 * Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com>
6 * Copyright (C) 2021 Advanced Micro Devices
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/init.h>
12#include <linux/input.h>
13#include <linux/platform_device.h>
14#include <linux/acpi.h>
15#include <acpi/acpi_bus.h>
16
17MODULE_LICENSE("GPL");
18MODULE_AUTHOR("Alex Hung");
19MODULE_ALIAS("acpi*:HPQ6001:*");
20MODULE_ALIAS("acpi*:WSTADEF:*");
21MODULE_ALIAS("acpi*:AMDI0051:*");
22
23static struct input_dev *wl_input_dev;
24
25static const struct acpi_device_id wl_ids[] = {
26 {"HPQ6001", 0},
27 {"WSTADEF", 0},
28 {"AMDI0051", 0},
29 {"", 0},
30};
31
32static int wireless_input_setup(void)
33{
34 int err;
35
36 wl_input_dev = input_allocate_device();
37 if (!wl_input_dev)
38 return -ENOMEM;
39
40 wl_input_dev->name = "Wireless hotkeys";
41 wl_input_dev->phys = "hpq6001/input0";
42 wl_input_dev->id.bustype = BUS_HOST;
43 wl_input_dev->evbit[0] = BIT(EV_KEY);
44 set_bit(KEY_RFKILL, wl_input_dev->keybit);
45
46 err = input_register_device(wl_input_dev);
47 if (err)
48 goto err_free_dev;
49
50 return 0;
51
52err_free_dev:
53 input_free_device(wl_input_dev);
54 return err;
55}
56
57static void wireless_input_destroy(void)
58{
59 input_unregister_device(wl_input_dev);
60}
61
62static void wl_notify(struct acpi_device *acpi_dev, u32 event)
63{
64 if (event != 0x80) {
65 pr_info("Received unknown event (0x%x)\n", event);
66 return;
67 }
68
69 input_report_key(wl_input_dev, KEY_RFKILL, 1);
70 input_sync(wl_input_dev);
71 input_report_key(wl_input_dev, KEY_RFKILL, 0);
72 input_sync(wl_input_dev);
73}
74
75static int wl_add(struct acpi_device *device)
76{
77 int err;
78
79 err = wireless_input_setup();
80 if (err)
81 pr_err("Failed to setup wireless hotkeys\n");
82
83 return err;
84}
85
86static int wl_remove(struct acpi_device *device)
87{
88 wireless_input_destroy();
89 return 0;
90}
91
92static struct acpi_driver wl_driver = {
93 .name = "wireless-hotkey",
94 .owner = THIS_MODULE,
95 .ids = wl_ids,
96 .ops = {
97 .add = wl_add,
98 .remove = wl_remove,
99 .notify = wl_notify,
100 },
101};
102
103module_acpi_driver(wl_driver);