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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_DESCRIPTION("Airplane mode button for AMD, HP & Xiaomi laptops");
18MODULE_LICENSE("GPL");
19MODULE_AUTHOR("Alex Hung");
20MODULE_ALIAS("acpi*:HPQ6001:*");
21MODULE_ALIAS("acpi*:WSTADEF:*");
22MODULE_ALIAS("acpi*:AMDI0051:*");
23MODULE_ALIAS("acpi*:LGEX0815:*");
24
25struct wl_button {
26 struct input_dev *input_dev;
27 char phys[32];
28};
29
30static const struct acpi_device_id wl_ids[] = {
31 {"HPQ6001", 0},
32 {"WSTADEF", 0},
33 {"AMDI0051", 0},
34 {"LGEX0815", 0},
35 {"", 0},
36};
37
38static int wireless_input_setup(struct acpi_device *device)
39{
40 struct wl_button *button = acpi_driver_data(device);
41 int err;
42
43 button->input_dev = input_allocate_device();
44 if (!button->input_dev)
45 return -ENOMEM;
46
47 snprintf(button->phys, sizeof(button->phys), "%s/input0", acpi_device_hid(device));
48
49 button->input_dev->name = "Wireless hotkeys";
50 button->input_dev->phys = button->phys;
51 button->input_dev->id.bustype = BUS_HOST;
52 button->input_dev->evbit[0] = BIT(EV_KEY);
53 set_bit(KEY_RFKILL, button->input_dev->keybit);
54
55 err = input_register_device(button->input_dev);
56 if (err)
57 goto err_free_dev;
58
59 return 0;
60
61err_free_dev:
62 input_free_device(button->input_dev);
63 return err;
64}
65
66static void wireless_input_destroy(struct acpi_device *device)
67{
68 struct wl_button *button = acpi_driver_data(device);
69
70 input_unregister_device(button->input_dev);
71 kfree(button);
72}
73
74static void wl_notify(struct acpi_device *acpi_dev, u32 event)
75{
76 struct wl_button *button = acpi_driver_data(acpi_dev);
77
78 if (event != 0x80) {
79 pr_info("Received unknown event (0x%x)\n", event);
80 return;
81 }
82
83 input_report_key(button->input_dev, KEY_RFKILL, 1);
84 input_sync(button->input_dev);
85 input_report_key(button->input_dev, KEY_RFKILL, 0);
86 input_sync(button->input_dev);
87}
88
89static int wl_add(struct acpi_device *device)
90{
91 struct wl_button *button;
92 int err;
93
94 button = kzalloc(sizeof(struct wl_button), GFP_KERNEL);
95 if (!button)
96 return -ENOMEM;
97
98 device->driver_data = button;
99
100 err = wireless_input_setup(device);
101 if (err) {
102 pr_err("Failed to setup wireless hotkeys\n");
103 kfree(button);
104 }
105
106 return err;
107}
108
109static void wl_remove(struct acpi_device *device)
110{
111 wireless_input_destroy(device);
112}
113
114static struct acpi_driver wl_driver = {
115 .name = "wireless-hotkey",
116 .ids = wl_ids,
117 .ops = {
118 .add = wl_add,
119 .remove = wl_remove,
120 .notify = wl_notify,
121 },
122};
123
124module_acpi_driver(wl_driver);