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>
34 #include <linux/dmi.h>
36 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
37 MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver");
38 MODULE_LICENSE("GPL");
40 #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492"
42 static int acpi_video;
44 MODULE_ALIAS("wmi:"DELL_EVENT_GUID);
47 char type; /* See KE_* below */
52 enum { KE_KEY, KE_SW, KE_IGNORE, KE_END };
55 * Certain keys are flagged as KE_IGNORE. All of these are either
56 * notifications (rather than requests for change) or are also sent
57 * via the keyboard controller so should not be sent again.
60 static struct key_entry dell_legacy_wmi_keymap[] = {
61 {KE_KEY, 0xe045, KEY_PROG1},
62 {KE_KEY, 0xe009, KEY_EJECTCD},
64 /* These also contain the brightness level at offset 6 */
65 {KE_KEY, 0xe006, KEY_BRIGHTNESSUP},
66 {KE_KEY, 0xe005, KEY_BRIGHTNESSDOWN},
68 /* Battery health status button */
69 {KE_KEY, 0xe007, KEY_BATTERY},
71 /* This is actually for all radios. Although physically a
72 * switch, the notification does not provide an indication of
73 * state and so it should be reported as a key */
74 {KE_KEY, 0xe008, KEY_WLAN},
76 /* The next device is at offset 6, the active devices are at
77 offset 8 and the attached devices at offset 10 */
78 {KE_KEY, 0xe00b, KEY_SWITCHVIDEOMODE},
80 {KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE},
82 /* BIOS error detected */
83 {KE_IGNORE, 0xe00d, KEY_RESERVED},
86 {KE_KEY, 0xe011, KEY_PROG2},
88 /* Ambient light sensor toggle */
89 {KE_IGNORE, 0xe013, KEY_RESERVED},
91 {KE_IGNORE, 0xe020, KEY_MUTE},
92 {KE_IGNORE, 0xe02e, KEY_VOLUMEDOWN},
93 {KE_IGNORE, 0xe030, KEY_VOLUMEUP},
94 {KE_IGNORE, 0xe033, KEY_KBDILLUMUP},
95 {KE_IGNORE, 0xe034, KEY_KBDILLUMDOWN},
96 {KE_IGNORE, 0xe03a, KEY_CAPSLOCK},
97 {KE_IGNORE, 0xe045, KEY_NUMLOCK},
98 {KE_IGNORE, 0xe046, KEY_SCROLLLOCK},
102 static bool dell_new_hk_type;
104 struct dell_new_keymap_entry {
109 struct dell_hotkey_table {
110 struct dmi_header header;
111 struct dell_new_keymap_entry keymap[];
115 static struct key_entry *dell_new_wmi_keymap;
117 static u16 bios_to_linux_keycode[256] = {
119 KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG,
120 KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
121 KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE,
122 KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD,
123 KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN,
124 KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE,
125 KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN,
126 KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2,
127 KEY_UNKNOWN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
128 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
129 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
130 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
131 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
132 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
133 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
134 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
135 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
136 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
141 static struct key_entry *dell_wmi_keymap = dell_legacy_wmi_keymap;
143 static struct input_dev *dell_wmi_input_dev;
145 static struct key_entry *dell_wmi_get_entry_by_scancode(int code)
147 struct key_entry *key;
149 for (key = dell_wmi_keymap; key->type != KE_END; key++)
150 if (code == key->code)
156 static struct key_entry *dell_wmi_get_entry_by_keycode(int keycode)
158 struct key_entry *key;
160 for (key = dell_wmi_keymap; key->type != KE_END; key++)
161 if (key->type == KE_KEY && keycode == key->keycode)
167 static int dell_wmi_getkeycode(struct input_dev *dev, int scancode,
170 struct key_entry *key = dell_wmi_get_entry_by_scancode(scancode);
172 if (key && key->type == KE_KEY) {
173 *keycode = key->keycode;
180 static int dell_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
182 struct key_entry *key;
185 if (keycode < 0 || keycode > KEY_MAX)
188 key = dell_wmi_get_entry_by_scancode(scancode);
189 if (key && key->type == KE_KEY) {
190 old_keycode = key->keycode;
191 key->keycode = keycode;
192 set_bit(keycode, dev->keybit);
193 if (!dell_wmi_get_entry_by_keycode(old_keycode))
194 clear_bit(old_keycode, dev->keybit);
200 static void dell_wmi_notify(u32 value, void *context)
202 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
203 static struct key_entry *key;
204 union acpi_object *obj;
206 wmi_get_event_data(value, &response);
208 obj = (union acpi_object *)response.pointer;
210 if (obj && obj->type == ACPI_TYPE_BUFFER) {
212 u16 *buffer_entry = (u16 *)obj->buffer.pointer;
213 if (dell_new_hk_type && (buffer_entry[1] != 0x10)) {
214 printk(KERN_INFO "dell-wmi: Received unknown WMI event"
215 " (0x%x)\n", buffer_entry[1]);
219 if (dell_new_hk_type)
220 reported_key = (int)buffer_entry[2];
222 reported_key = (int)buffer_entry[1] & 0xffff;
224 key = dell_wmi_get_entry_by_scancode(reported_key);
227 printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n",
229 } else if ((key->keycode == KEY_BRIGHTNESSUP ||
230 key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) {
231 /* Don't report brightness notifications that will also
235 input_report_key(dell_wmi_input_dev, key->keycode, 1);
236 input_sync(dell_wmi_input_dev);
237 input_report_key(dell_wmi_input_dev, key->keycode, 0);
238 input_sync(dell_wmi_input_dev);
245 static void setup_new_hk_map(const struct dmi_header *dm)
249 int hotkey_num = (dm->length-4)/sizeof(struct dell_new_keymap_entry);
250 struct dell_hotkey_table *table =
251 container_of(dm, struct dell_hotkey_table, header);
253 dell_new_wmi_keymap = kzalloc((hotkey_num+1) *
254 sizeof(struct key_entry), GFP_KERNEL);
256 for (i = 0; i < hotkey_num; i++) {
257 dell_new_wmi_keymap[i].type = KE_KEY;
258 dell_new_wmi_keymap[i].code = table->keymap[i].scancode;
259 dell_new_wmi_keymap[i].keycode =
260 (table->keymap[i].keycode > 255) ? 0 :
261 bios_to_linux_keycode[table->keymap[i].keycode];
264 dell_new_wmi_keymap[i].type = KE_END;
265 dell_new_wmi_keymap[i].code = 0;
266 dell_new_wmi_keymap[i].keycode = 0;
268 dell_wmi_keymap = dell_new_wmi_keymap;
273 static void find_hk_type(const struct dmi_header *dm, void *dummy)
276 if ((dm->type == 0xb2) && (dm->length > 6)) {
277 dell_new_hk_type = true;
278 setup_new_hk_map(dm);
284 static int __init dell_wmi_input_setup(void)
286 struct key_entry *key;
289 dell_wmi_input_dev = input_allocate_device();
291 if (!dell_wmi_input_dev)
294 dell_wmi_input_dev->name = "Dell WMI hotkeys";
295 dell_wmi_input_dev->phys = "wmi/input0";
296 dell_wmi_input_dev->id.bustype = BUS_HOST;
297 dell_wmi_input_dev->getkeycode = dell_wmi_getkeycode;
298 dell_wmi_input_dev->setkeycode = dell_wmi_setkeycode;
300 for (key = dell_wmi_keymap; key->type != KE_END; key++) {
303 set_bit(EV_KEY, dell_wmi_input_dev->evbit);
304 set_bit(key->keycode, dell_wmi_input_dev->keybit);
307 set_bit(EV_SW, dell_wmi_input_dev->evbit);
308 set_bit(key->keycode, dell_wmi_input_dev->swbit);
313 err = input_register_device(dell_wmi_input_dev);
316 input_free_device(dell_wmi_input_dev);
323 static int __init dell_wmi_init(void)
327 if (wmi_has_guid(DELL_EVENT_GUID)) {
328 printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n");
332 dmi_walk(find_hk_type, NULL);
333 acpi_video = acpi_video_backlight_support();
335 err = dell_wmi_input_setup();
339 err = wmi_install_notify_handler(DELL_EVENT_GUID,
340 dell_wmi_notify, NULL);
342 input_unregister_device(dell_wmi_input_dev);
344 "dell-wmi: Unable to register notify handler - %d\n",
352 static void __exit dell_wmi_exit(void)
354 wmi_remove_notify_handler(DELL_EVENT_GUID);
355 input_unregister_device(dell_wmi_input_dev);
358 module_init(dell_wmi_init);
359 module_exit(dell_wmi_exit);