1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Airplane mode button for HP & Xiaomi laptops
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2014-2017 Alex Hung <alex.hung@canonical.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/kernel.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <linux/init.h>
11*4882a593Smuzhiyun #include <linux/input.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/acpi.h>
14*4882a593Smuzhiyun #include <acpi/acpi_bus.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun MODULE_LICENSE("GPL");
17*4882a593Smuzhiyun MODULE_AUTHOR("Alex Hung");
18*4882a593Smuzhiyun MODULE_ALIAS("acpi*:HPQ6001:*");
19*4882a593Smuzhiyun MODULE_ALIAS("acpi*:WSTADEF:*");
20*4882a593Smuzhiyun MODULE_ALIAS("acpi*:AMDI0051:*");
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun static struct input_dev *hpwl_input_dev;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun static const struct acpi_device_id hpwl_ids[] = {
25*4882a593Smuzhiyun {"HPQ6001", 0},
26*4882a593Smuzhiyun {"WSTADEF", 0},
27*4882a593Smuzhiyun {"AMDI0051", 0},
28*4882a593Smuzhiyun {"", 0},
29*4882a593Smuzhiyun };
30*4882a593Smuzhiyun
hp_wireless_input_setup(void)31*4882a593Smuzhiyun static int hp_wireless_input_setup(void)
32*4882a593Smuzhiyun {
33*4882a593Smuzhiyun int err;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun hpwl_input_dev = input_allocate_device();
36*4882a593Smuzhiyun if (!hpwl_input_dev)
37*4882a593Smuzhiyun return -ENOMEM;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun hpwl_input_dev->name = "HP Wireless hotkeys";
40*4882a593Smuzhiyun hpwl_input_dev->phys = "hpq6001/input0";
41*4882a593Smuzhiyun hpwl_input_dev->id.bustype = BUS_HOST;
42*4882a593Smuzhiyun hpwl_input_dev->evbit[0] = BIT(EV_KEY);
43*4882a593Smuzhiyun set_bit(KEY_RFKILL, hpwl_input_dev->keybit);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun err = input_register_device(hpwl_input_dev);
46*4882a593Smuzhiyun if (err)
47*4882a593Smuzhiyun goto err_free_dev;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun return 0;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun err_free_dev:
52*4882a593Smuzhiyun input_free_device(hpwl_input_dev);
53*4882a593Smuzhiyun return err;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
hp_wireless_input_destroy(void)56*4882a593Smuzhiyun static void hp_wireless_input_destroy(void)
57*4882a593Smuzhiyun {
58*4882a593Smuzhiyun input_unregister_device(hpwl_input_dev);
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
hpwl_notify(struct acpi_device * acpi_dev,u32 event)61*4882a593Smuzhiyun static void hpwl_notify(struct acpi_device *acpi_dev, u32 event)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun if (event != 0x80) {
64*4882a593Smuzhiyun pr_info("Received unknown event (0x%x)\n", event);
65*4882a593Smuzhiyun return;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun input_report_key(hpwl_input_dev, KEY_RFKILL, 1);
69*4882a593Smuzhiyun input_sync(hpwl_input_dev);
70*4882a593Smuzhiyun input_report_key(hpwl_input_dev, KEY_RFKILL, 0);
71*4882a593Smuzhiyun input_sync(hpwl_input_dev);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
hpwl_add(struct acpi_device * device)74*4882a593Smuzhiyun static int hpwl_add(struct acpi_device *device)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun int err;
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun err = hp_wireless_input_setup();
79*4882a593Smuzhiyun if (err)
80*4882a593Smuzhiyun pr_err("Failed to setup hp wireless hotkeys\n");
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun return err;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
hpwl_remove(struct acpi_device * device)85*4882a593Smuzhiyun static int hpwl_remove(struct acpi_device *device)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun hp_wireless_input_destroy();
88*4882a593Smuzhiyun return 0;
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun static struct acpi_driver hpwl_driver = {
92*4882a593Smuzhiyun .name = "hp-wireless",
93*4882a593Smuzhiyun .owner = THIS_MODULE,
94*4882a593Smuzhiyun .ids = hpwl_ids,
95*4882a593Smuzhiyun .ops = {
96*4882a593Smuzhiyun .add = hpwl_add,
97*4882a593Smuzhiyun .remove = hpwl_remove,
98*4882a593Smuzhiyun .notify = hpwl_notify,
99*4882a593Smuzhiyun },
100*4882a593Smuzhiyun };
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun module_acpi_driver(hpwl_driver);
103