1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * toshiba_wmi.c - Toshiba WMI Hotkey Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/types.h>
14*4882a593Smuzhiyun #include <linux/acpi.h>
15*4882a593Smuzhiyun #include <linux/input.h>
16*4882a593Smuzhiyun #include <linux/input/sparse-keymap.h>
17*4882a593Smuzhiyun #include <linux/dmi.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun MODULE_AUTHOR("Azael Avalos");
20*4882a593Smuzhiyun MODULE_DESCRIPTION("Toshiba WMI Hotkey Driver");
21*4882a593Smuzhiyun MODULE_LICENSE("GPL");
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #define WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100"
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun MODULE_ALIAS("wmi:"WMI_EVENT_GUID);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun static struct input_dev *toshiba_wmi_input_dev;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun static const struct key_entry toshiba_wmi_keymap[] __initconst = {
30*4882a593Smuzhiyun /* TODO: Add keymap values once found... */
31*4882a593Smuzhiyun /*{ KE_KEY, 0x00, { KEY_ } },*/
32*4882a593Smuzhiyun { KE_END, 0 }
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
toshiba_wmi_notify(u32 value,void * context)35*4882a593Smuzhiyun static void toshiba_wmi_notify(u32 value, void *context)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
38*4882a593Smuzhiyun union acpi_object *obj;
39*4882a593Smuzhiyun acpi_status status;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun status = wmi_get_event_data(value, &response);
42*4882a593Smuzhiyun if (ACPI_FAILURE(status)) {
43*4882a593Smuzhiyun pr_err("Bad event status 0x%x\n", status);
44*4882a593Smuzhiyun return;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun obj = (union acpi_object *)response.pointer;
48*4882a593Smuzhiyun if (!obj)
49*4882a593Smuzhiyun return;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun /* TODO: Add proper checks once we have data */
52*4882a593Smuzhiyun pr_debug("Unknown event received, obj type %x\n", obj->type);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun kfree(response.pointer);
55*4882a593Smuzhiyun }
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun static const struct dmi_system_id toshiba_wmi_dmi_table[] __initconst = {
58*4882a593Smuzhiyun {
59*4882a593Smuzhiyun .ident = "Toshiba laptop",
60*4882a593Smuzhiyun .matches = {
61*4882a593Smuzhiyun DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
62*4882a593Smuzhiyun },
63*4882a593Smuzhiyun },
64*4882a593Smuzhiyun {}
65*4882a593Smuzhiyun };
66*4882a593Smuzhiyun
toshiba_wmi_input_setup(void)67*4882a593Smuzhiyun static int __init toshiba_wmi_input_setup(void)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun acpi_status status;
70*4882a593Smuzhiyun int err;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun toshiba_wmi_input_dev = input_allocate_device();
73*4882a593Smuzhiyun if (!toshiba_wmi_input_dev)
74*4882a593Smuzhiyun return -ENOMEM;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun toshiba_wmi_input_dev->name = "Toshiba WMI hotkeys";
77*4882a593Smuzhiyun toshiba_wmi_input_dev->phys = "wmi/input0";
78*4882a593Smuzhiyun toshiba_wmi_input_dev->id.bustype = BUS_HOST;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun err = sparse_keymap_setup(toshiba_wmi_input_dev,
81*4882a593Smuzhiyun toshiba_wmi_keymap, NULL);
82*4882a593Smuzhiyun if (err)
83*4882a593Smuzhiyun goto err_free_dev;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun status = wmi_install_notify_handler(WMI_EVENT_GUID,
86*4882a593Smuzhiyun toshiba_wmi_notify, NULL);
87*4882a593Smuzhiyun if (ACPI_FAILURE(status)) {
88*4882a593Smuzhiyun err = -EIO;
89*4882a593Smuzhiyun goto err_free_dev;
90*4882a593Smuzhiyun }
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun err = input_register_device(toshiba_wmi_input_dev);
93*4882a593Smuzhiyun if (err)
94*4882a593Smuzhiyun goto err_remove_notifier;
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun return 0;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun err_remove_notifier:
99*4882a593Smuzhiyun wmi_remove_notify_handler(WMI_EVENT_GUID);
100*4882a593Smuzhiyun err_free_dev:
101*4882a593Smuzhiyun input_free_device(toshiba_wmi_input_dev);
102*4882a593Smuzhiyun return err;
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
toshiba_wmi_input_destroy(void)105*4882a593Smuzhiyun static void toshiba_wmi_input_destroy(void)
106*4882a593Smuzhiyun {
107*4882a593Smuzhiyun wmi_remove_notify_handler(WMI_EVENT_GUID);
108*4882a593Smuzhiyun input_unregister_device(toshiba_wmi_input_dev);
109*4882a593Smuzhiyun }
110*4882a593Smuzhiyun
toshiba_wmi_init(void)111*4882a593Smuzhiyun static int __init toshiba_wmi_init(void)
112*4882a593Smuzhiyun {
113*4882a593Smuzhiyun int ret;
114*4882a593Smuzhiyun
115*4882a593Smuzhiyun if (!wmi_has_guid(WMI_EVENT_GUID) ||
116*4882a593Smuzhiyun !dmi_check_system(toshiba_wmi_dmi_table))
117*4882a593Smuzhiyun return -ENODEV;
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun ret = toshiba_wmi_input_setup();
120*4882a593Smuzhiyun if (ret) {
121*4882a593Smuzhiyun pr_err("Failed to setup input device\n");
122*4882a593Smuzhiyun return ret;
123*4882a593Smuzhiyun }
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun pr_info("Toshiba WMI Hotkey Driver\n");
126*4882a593Smuzhiyun
127*4882a593Smuzhiyun return 0;
128*4882a593Smuzhiyun }
129*4882a593Smuzhiyun
toshiba_wmi_exit(void)130*4882a593Smuzhiyun static void __exit toshiba_wmi_exit(void)
131*4882a593Smuzhiyun {
132*4882a593Smuzhiyun if (wmi_has_guid(WMI_EVENT_GUID))
133*4882a593Smuzhiyun toshiba_wmi_input_destroy();
134*4882a593Smuzhiyun }
135*4882a593Smuzhiyun
136*4882a593Smuzhiyun module_init(toshiba_wmi_init);
137*4882a593Smuzhiyun module_exit(toshiba_wmi_exit);
138