]> Git Repo - linux.git/blob - drivers/platform/x86/hp-wireless.c
Merge tag 'perf-urgent-for-mingo-4.18-20180625' of git://git.kernel.org/pub/scm/linux...
[linux.git] / drivers / platform / x86 / hp-wireless.c
1 /*
2  *  Airplane mode button for HP & Xiaomi laptops
3  *
4  *  Copyright (C) 2014-2017 Alex Hung <[email protected]>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License along
17  *  with this program; if not, write to the Free Software Foundation, Inc.,
18  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/input.h>
25 #include <linux/platform_device.h>
26 #include <linux/acpi.h>
27 #include <acpi/acpi_bus.h>
28
29 MODULE_LICENSE("GPL");
30 MODULE_AUTHOR("Alex Hung");
31 MODULE_ALIAS("acpi*:HPQ6001:*");
32 MODULE_ALIAS("acpi*:WSTADEF:*");
33
34 static struct input_dev *hpwl_input_dev;
35
36 static const struct acpi_device_id hpwl_ids[] = {
37         {"HPQ6001", 0},
38         {"WSTADEF", 0},
39         {"", 0},
40 };
41
42 static int hp_wireless_input_setup(void)
43 {
44         int err;
45
46         hpwl_input_dev = input_allocate_device();
47         if (!hpwl_input_dev)
48                 return -ENOMEM;
49
50         hpwl_input_dev->name = "HP Wireless hotkeys";
51         hpwl_input_dev->phys = "hpq6001/input0";
52         hpwl_input_dev->id.bustype = BUS_HOST;
53         hpwl_input_dev->evbit[0] = BIT(EV_KEY);
54         set_bit(KEY_RFKILL, hpwl_input_dev->keybit);
55
56         err = input_register_device(hpwl_input_dev);
57         if (err)
58                 goto err_free_dev;
59
60         return 0;
61
62 err_free_dev:
63         input_free_device(hpwl_input_dev);
64         return err;
65 }
66
67 static void hp_wireless_input_destroy(void)
68 {
69         input_unregister_device(hpwl_input_dev);
70 }
71
72 static void hpwl_notify(struct acpi_device *acpi_dev, u32 event)
73 {
74         if (event != 0x80) {
75                 pr_info("Received unknown event (0x%x)\n", event);
76                 return;
77         }
78
79         input_report_key(hpwl_input_dev, KEY_RFKILL, 1);
80         input_sync(hpwl_input_dev);
81         input_report_key(hpwl_input_dev, KEY_RFKILL, 0);
82         input_sync(hpwl_input_dev);
83 }
84
85 static int hpwl_add(struct acpi_device *device)
86 {
87         int err;
88
89         err = hp_wireless_input_setup();
90         if (err)
91                 pr_err("Failed to setup hp wireless hotkeys\n");
92
93         return err;
94 }
95
96 static int hpwl_remove(struct acpi_device *device)
97 {
98         hp_wireless_input_destroy();
99         return 0;
100 }
101
102 static struct acpi_driver hpwl_driver = {
103         .name   = "hp-wireless",
104         .owner  = THIS_MODULE,
105         .ids    = hpwl_ids,
106         .ops    = {
107                 .add    = hpwl_add,
108                 .remove = hpwl_remove,
109                 .notify = hpwl_notify,
110         },
111 };
112
113 module_acpi_driver(hpwl_driver);
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