tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * toshiba_wmi.c - Toshiba WMI Hotkey Driver
4 *
5 * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
6 */
7
8#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/types.h>
14#include <linux/acpi.h>
15#include <linux/input.h>
16#include <linux/input/sparse-keymap.h>
17#include <linux/dmi.h>
18
19MODULE_AUTHOR("Azael Avalos");
20MODULE_DESCRIPTION("Toshiba WMI Hotkey Driver");
21MODULE_LICENSE("GPL");
22
23#define WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
24
25MODULE_ALIAS("wmi:"WMI_EVENT_GUID);
26
27static struct input_dev *toshiba_wmi_input_dev;
28
29static const struct key_entry toshiba_wmi_keymap[] __initconst = {
30 /* TODO: Add keymap values once found... */
31 /*{ KE_KEY, 0x00, { KEY_ } },*/
32 { KE_END, 0 }
33};
34
35static void toshiba_wmi_notify(union acpi_object *obj, void *context)
36{
37 if (!obj)
38 return;
39
40 /* TODO: Add proper checks once we have data */
41 pr_debug("Unknown event received, obj type %x\n", obj->type);
42}
43
44static const struct dmi_system_id toshiba_wmi_dmi_table[] __initconst = {
45 {
46 .ident = "Toshiba laptop",
47 .matches = {
48 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
49 },
50 },
51 {}
52};
53
54static int __init toshiba_wmi_input_setup(void)
55{
56 acpi_status status;
57 int err;
58
59 toshiba_wmi_input_dev = input_allocate_device();
60 if (!toshiba_wmi_input_dev)
61 return -ENOMEM;
62
63 toshiba_wmi_input_dev->name = "Toshiba WMI hotkeys";
64 toshiba_wmi_input_dev->phys = "wmi/input0";
65 toshiba_wmi_input_dev->id.bustype = BUS_HOST;
66
67 err = sparse_keymap_setup(toshiba_wmi_input_dev,
68 toshiba_wmi_keymap, NULL);
69 if (err)
70 goto err_free_dev;
71
72 status = wmi_install_notify_handler(WMI_EVENT_GUID,
73 toshiba_wmi_notify, NULL);
74 if (ACPI_FAILURE(status)) {
75 err = -EIO;
76 goto err_free_dev;
77 }
78
79 err = input_register_device(toshiba_wmi_input_dev);
80 if (err)
81 goto err_remove_notifier;
82
83 return 0;
84
85 err_remove_notifier:
86 wmi_remove_notify_handler(WMI_EVENT_GUID);
87 err_free_dev:
88 input_free_device(toshiba_wmi_input_dev);
89 return err;
90}
91
92static void toshiba_wmi_input_destroy(void)
93{
94 wmi_remove_notify_handler(WMI_EVENT_GUID);
95 input_unregister_device(toshiba_wmi_input_dev);
96}
97
98static int __init toshiba_wmi_init(void)
99{
100 int ret;
101
102 if (!wmi_has_guid(WMI_EVENT_GUID) ||
103 !dmi_check_system(toshiba_wmi_dmi_table))
104 return -ENODEV;
105
106 ret = toshiba_wmi_input_setup();
107 if (ret) {
108 pr_err("Failed to setup input device\n");
109 return ret;
110 }
111
112 pr_info("Toshiba WMI Hotkey Driver\n");
113
114 return 0;
115}
116
117static void __exit toshiba_wmi_exit(void)
118{
119 if (wmi_has_guid(WMI_EVENT_GUID))
120 toshiba_wmi_input_destroy();
121}
122
123module_init(toshiba_wmi_init);
124module_exit(toshiba_wmi_exit);