4 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
6 * Portions based on wistron_btns.c:
7 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
8 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
9 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/types.h>
30 #include <linux/input.h>
31 #include <acpi/acpi_drivers.h>
32 #include <linux/acpi.h>
33 #include <linux/string.h>
35 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
36 MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
37 MODULE_LICENSE("GPL");
39 #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
41 MODULE_ALIAS("wmi:"DELL_EVENT_GUID
);
44 char type
; /* See KE_* below */
49 enum { KE_KEY
, KE_SW
, KE_END
};
51 static struct key_entry dell_wmi_keymap
[] = {
52 {KE_KEY
, 0xe045, KEY_PROG1
},
56 static struct input_dev
*dell_wmi_input_dev
;
58 static struct key_entry
*dell_wmi_get_entry_by_scancode(int code
)
60 struct key_entry
*key
;
62 for (key
= dell_wmi_keymap
; key
->type
!= KE_END
; key
++)
63 if (code
== key
->code
)
69 static struct key_entry
*dell_wmi_get_entry_by_keycode(int keycode
)
71 struct key_entry
*key
;
73 for (key
= dell_wmi_keymap
; key
->type
!= KE_END
; key
++)
74 if (key
->type
== KE_KEY
&& keycode
== key
->keycode
)
80 static int dell_wmi_getkeycode(struct input_dev
*dev
, int scancode
,
83 struct key_entry
*key
= dell_wmi_get_entry_by_scancode(scancode
);
85 if (key
&& key
->type
== KE_KEY
) {
86 *keycode
= key
->keycode
;
93 static int dell_wmi_setkeycode(struct input_dev
*dev
, int scancode
, int keycode
)
95 struct key_entry
*key
;
98 if (keycode
< 0 || keycode
> KEY_MAX
)
101 key
= dell_wmi_get_entry_by_scancode(scancode
);
102 if (key
&& key
->type
== KE_KEY
) {
103 old_keycode
= key
->keycode
;
104 key
->keycode
= keycode
;
105 set_bit(keycode
, dev
->keybit
);
106 if (!dell_wmi_get_entry_by_keycode(old_keycode
))
107 clear_bit(old_keycode
, dev
->keybit
);
113 static void dell_wmi_notify(u32 value
, void *context
)
115 struct acpi_buffer response
= { ACPI_ALLOCATE_BUFFER
, NULL
};
116 static struct key_entry
*key
;
117 union acpi_object
*obj
;
119 wmi_get_event_data(value
, &response
);
121 obj
= (union acpi_object
*)response
.pointer
;
123 if (obj
&& obj
->type
== ACPI_TYPE_BUFFER
) {
124 int *buffer
= (int *)obj
->buffer
.pointer
;
125 key
= dell_wmi_get_entry_by_scancode(buffer
[1]);
127 input_report_key(dell_wmi_input_dev
, key
->keycode
, 1);
128 input_sync(dell_wmi_input_dev
);
129 input_report_key(dell_wmi_input_dev
, key
->keycode
, 0);
130 input_sync(dell_wmi_input_dev
);
132 printk(KERN_INFO
"dell-wmi: Unknown key %x pressed\n",
137 static int __init
dell_wmi_input_setup(void)
139 struct key_entry
*key
;
142 dell_wmi_input_dev
= input_allocate_device();
144 if (!dell_wmi_input_dev
)
147 dell_wmi_input_dev
->name
= "Dell WMI hotkeys";
148 dell_wmi_input_dev
->phys
= "wmi/input0";
149 dell_wmi_input_dev
->id
.bustype
= BUS_HOST
;
150 dell_wmi_input_dev
->getkeycode
= dell_wmi_getkeycode
;
151 dell_wmi_input_dev
->setkeycode
= dell_wmi_setkeycode
;
153 for (key
= dell_wmi_keymap
; key
->type
!= KE_END
; key
++) {
156 set_bit(EV_KEY
, dell_wmi_input_dev
->evbit
);
157 set_bit(key
->keycode
, dell_wmi_input_dev
->keybit
);
160 set_bit(EV_SW
, dell_wmi_input_dev
->evbit
);
161 set_bit(key
->keycode
, dell_wmi_input_dev
->swbit
);
166 err
= input_register_device(dell_wmi_input_dev
);
169 input_free_device(dell_wmi_input_dev
);
176 static int __init
dell_wmi_init(void)
180 if (wmi_has_guid(DELL_EVENT_GUID
)) {
181 err
= dell_wmi_input_setup();
186 err
= wmi_install_notify_handler(DELL_EVENT_GUID
,
187 dell_wmi_notify
, NULL
);
189 input_unregister_device(dell_wmi_input_dev
);
190 printk(KERN_ERR
"dell-wmi: Unable to register"
191 " notify handler - %d\n", err
);
196 printk(KERN_WARNING
"dell-wmi: No known WMI GUID found\n");
201 static void __exit
dell_wmi_exit(void)
203 if (wmi_has_guid(DELL_EVENT_GUID
)) {
204 wmi_remove_notify_handler(DELL_EVENT_GUID
);
205 input_unregister_device(dell_wmi_input_dev
);
209 module_init(dell_wmi_init
);
210 module_exit(dell_wmi_exit
);