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0b3f6109 MG |
1 | /* |
2 | * Dell WMI hotkeys | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat <mjg@redhat.com> | |
5 | * | |
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> | |
10 | * | |
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. | |
15 | * | |
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. | |
20 | * | |
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 | |
24 | */ | |
25 | ||
26 | #include <linux/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
5a0e3ad6 | 29 | #include <linux/slab.h> |
0b3f6109 MG |
30 | #include <linux/types.h> |
31 | #include <linux/input.h> | |
32 | #include <acpi/acpi_drivers.h> | |
33 | #include <linux/acpi.h> | |
34 | #include <linux/string.h> | |
5ea25597 | 35 | #include <linux/dmi.h> |
0b3f6109 MG |
36 | |
37 | MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); | |
38 | MODULE_DESCRIPTION("Dell laptop WMI hotkeys driver"); | |
39 | MODULE_LICENSE("GPL"); | |
40 | ||
41 | #define DELL_EVENT_GUID "9DBB5994-A997-11DA-B012-B622A1EF5492" | |
42 | ||
5ea25597 RK |
43 | static int acpi_video; |
44 | ||
0b3f6109 MG |
45 | MODULE_ALIAS("wmi:"DELL_EVENT_GUID); |
46 | ||
47 | struct key_entry { | |
48 | char type; /* See KE_* below */ | |
49 | u16 code; | |
50 | u16 keycode; | |
51 | }; | |
52 | ||
5cab0098 ML |
53 | enum { KE_KEY, KE_SW, KE_IGNORE, KE_END }; |
54 | ||
55 | /* | |
56 | * Certain keys are flagged as KE_IGNORE. All of these are either | |
57 | * notifications (rather than requests for change) or are also sent | |
58 | * via the keyboard controller so should not be sent again. | |
59 | */ | |
0b3f6109 | 60 | |
5ea25597 | 61 | static struct key_entry dell_legacy_wmi_keymap[] = { |
0b3f6109 | 62 | {KE_KEY, 0xe045, KEY_PROG1}, |
5cab0098 ML |
63 | {KE_KEY, 0xe009, KEY_EJECTCD}, |
64 | ||
65 | /* These also contain the brightness level at offset 6 */ | |
66 | {KE_KEY, 0xe006, KEY_BRIGHTNESSUP}, | |
67 | {KE_KEY, 0xe005, KEY_BRIGHTNESSDOWN}, | |
68 | ||
69 | /* Battery health status button */ | |
70 | {KE_KEY, 0xe007, KEY_BATTERY}, | |
71 | ||
72 | /* This is actually for all radios. Although physically a | |
73 | * switch, the notification does not provide an indication of | |
74 | * state and so it should be reported as a key */ | |
75 | {KE_KEY, 0xe008, KEY_WLAN}, | |
76 | ||
77 | /* The next device is at offset 6, the active devices are at | |
78 | offset 8 and the attached devices at offset 10 */ | |
5ea25597 | 79 | {KE_KEY, 0xe00b, KEY_SWITCHVIDEOMODE}, |
5cab0098 ML |
80 | |
81 | {KE_IGNORE, 0xe00c, KEY_KBDILLUMTOGGLE}, | |
82 | ||
83 | /* BIOS error detected */ | |
84 | {KE_IGNORE, 0xe00d, KEY_RESERVED}, | |
85 | ||
86 | /* Wifi Catcher */ | |
87 | {KE_KEY, 0xe011, KEY_PROG2}, | |
88 | ||
89 | /* Ambient light sensor toggle */ | |
90 | {KE_IGNORE, 0xe013, KEY_RESERVED}, | |
91 | ||
92 | {KE_IGNORE, 0xe020, KEY_MUTE}, | |
93 | {KE_IGNORE, 0xe02e, KEY_VOLUMEDOWN}, | |
94 | {KE_IGNORE, 0xe030, KEY_VOLUMEUP}, | |
95 | {KE_IGNORE, 0xe033, KEY_KBDILLUMUP}, | |
96 | {KE_IGNORE, 0xe034, KEY_KBDILLUMDOWN}, | |
97 | {KE_IGNORE, 0xe03a, KEY_CAPSLOCK}, | |
98 | {KE_IGNORE, 0xe045, KEY_NUMLOCK}, | |
99 | {KE_IGNORE, 0xe046, KEY_SCROLLLOCK}, | |
0b3f6109 MG |
100 | {KE_END, 0} |
101 | }; | |
102 | ||
5ea25597 RK |
103 | static bool dell_new_hk_type; |
104 | ||
105 | struct dell_new_keymap_entry { | |
106 | u16 scancode; | |
107 | u16 keycode; | |
108 | }; | |
109 | ||
110 | struct dell_hotkey_table { | |
111 | struct dmi_header header; | |
112 | struct dell_new_keymap_entry keymap[]; | |
113 | ||
114 | }; | |
115 | ||
116 | static struct key_entry *dell_new_wmi_keymap; | |
117 | ||
118 | static u16 bios_to_linux_keycode[256] = { | |
119 | ||
120 | KEY_MEDIA, KEY_NEXTSONG, KEY_PLAYPAUSE, KEY_PREVIOUSSONG, | |
121 | KEY_STOPCD, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, | |
122 | KEY_WWW, KEY_UNKNOWN, KEY_VOLUMEDOWN, KEY_MUTE, | |
123 | KEY_VOLUMEUP, KEY_UNKNOWN, KEY_BATTERY, KEY_EJECTCD, | |
124 | KEY_UNKNOWN, KEY_SLEEP, KEY_PROG1, KEY_BRIGHTNESSDOWN, | |
125 | KEY_BRIGHTNESSUP, KEY_UNKNOWN, KEY_KBDILLUMTOGGLE, | |
126 | KEY_UNKNOWN, KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, | |
127 | KEY_SWITCHVIDEOMODE, KEY_UNKNOWN, KEY_UNKNOWN, KEY_PROG2, | |
128 | KEY_UNKNOWN, 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, 0, 0, | |
137 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
138 | KEY_PROG3 | |
139 | }; | |
140 | ||
141 | ||
142 | static struct key_entry *dell_wmi_keymap = dell_legacy_wmi_keymap; | |
143 | ||
0b3f6109 MG |
144 | static struct input_dev *dell_wmi_input_dev; |
145 | ||
58b93995 | 146 | static struct key_entry *dell_wmi_get_entry_by_scancode(unsigned int code) |
0b3f6109 MG |
147 | { |
148 | struct key_entry *key; | |
149 | ||
150 | for (key = dell_wmi_keymap; key->type != KE_END; key++) | |
151 | if (code == key->code) | |
152 | return key; | |
153 | ||
154 | return NULL; | |
155 | } | |
156 | ||
58b93995 | 157 | static struct key_entry *dell_wmi_get_entry_by_keycode(unsigned int keycode) |
0b3f6109 MG |
158 | { |
159 | struct key_entry *key; | |
160 | ||
161 | for (key = dell_wmi_keymap; key->type != KE_END; key++) | |
162 | if (key->type == KE_KEY && keycode == key->keycode) | |
163 | return key; | |
164 | ||
165 | return NULL; | |
166 | } | |
167 | ||
58b93995 DT |
168 | static int dell_wmi_getkeycode(struct input_dev *dev, |
169 | unsigned int scancode, unsigned int *keycode) | |
0b3f6109 MG |
170 | { |
171 | struct key_entry *key = dell_wmi_get_entry_by_scancode(scancode); | |
172 | ||
173 | if (key && key->type == KE_KEY) { | |
174 | *keycode = key->keycode; | |
175 | return 0; | |
176 | } | |
177 | ||
178 | return -EINVAL; | |
179 | } | |
180 | ||
58b93995 DT |
181 | static int dell_wmi_setkeycode(struct input_dev *dev, |
182 | unsigned int scancode, unsigned int keycode) | |
0b3f6109 MG |
183 | { |
184 | struct key_entry *key; | |
58b93995 | 185 | unsigned int old_keycode; |
0b3f6109 MG |
186 | |
187 | key = dell_wmi_get_entry_by_scancode(scancode); | |
188 | if (key && key->type == KE_KEY) { | |
189 | old_keycode = key->keycode; | |
190 | key->keycode = keycode; | |
191 | set_bit(keycode, dev->keybit); | |
192 | if (!dell_wmi_get_entry_by_keycode(old_keycode)) | |
193 | clear_bit(old_keycode, dev->keybit); | |
194 | return 0; | |
195 | } | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | static void dell_wmi_notify(u32 value, void *context) | |
200 | { | |
201 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
202 | static struct key_entry *key; | |
203 | union acpi_object *obj; | |
fda11e61 | 204 | acpi_status status; |
0b3f6109 | 205 | |
fda11e61 LB |
206 | status = wmi_get_event_data(value, &response); |
207 | if (status != AE_OK) { | |
208 | printk(KERN_INFO "dell-wmi: bad event status 0x%x\n", status); | |
209 | return; | |
210 | } | |
0b3f6109 MG |
211 | |
212 | obj = (union acpi_object *)response.pointer; | |
213 | ||
214 | if (obj && obj->type == ACPI_TYPE_BUFFER) { | |
5ea25597 RK |
215 | int reported_key; |
216 | u16 *buffer_entry = (u16 *)obj->buffer.pointer; | |
217 | if (dell_new_hk_type && (buffer_entry[1] != 0x10)) { | |
218 | printk(KERN_INFO "dell-wmi: Received unknown WMI event" | |
219 | " (0x%x)\n", buffer_entry[1]); | |
a0624a90 | 220 | kfree(obj); |
5ea25597 RK |
221 | return; |
222 | } | |
223 | ||
224 | if (dell_new_hk_type) | |
225 | reported_key = (int)buffer_entry[2]; | |
226 | else | |
227 | reported_key = (int)buffer_entry[1] & 0xffff; | |
228 | ||
229 | key = dell_wmi_get_entry_by_scancode(reported_key); | |
230 | ||
231 | if (!key) { | |
232 | printk(KERN_INFO "dell-wmi: Unknown key %x pressed\n", | |
233 | reported_key); | |
234 | } else if ((key->keycode == KEY_BRIGHTNESSUP || | |
235 | key->keycode == KEY_BRIGHTNESSDOWN) && acpi_video) { | |
236 | /* Don't report brightness notifications that will also | |
237 | * come via ACPI */ | |
a0624a90 | 238 | ; |
5ea25597 | 239 | } else { |
0b3f6109 MG |
240 | input_report_key(dell_wmi_input_dev, key->keycode, 1); |
241 | input_sync(dell_wmi_input_dev); | |
242 | input_report_key(dell_wmi_input_dev, key->keycode, 0); | |
243 | input_sync(dell_wmi_input_dev); | |
5ea25597 | 244 | } |
0b3f6109 | 245 | } |
3e9b988e | 246 | kfree(obj); |
0b3f6109 MG |
247 | } |
248 | ||
5ea25597 RK |
249 | |
250 | static void setup_new_hk_map(const struct dmi_header *dm) | |
251 | { | |
252 | ||
253 | int i; | |
254 | int hotkey_num = (dm->length-4)/sizeof(struct dell_new_keymap_entry); | |
255 | struct dell_hotkey_table *table = | |
256 | container_of(dm, struct dell_hotkey_table, header); | |
257 | ||
258 | dell_new_wmi_keymap = kzalloc((hotkey_num+1) * | |
259 | sizeof(struct key_entry), GFP_KERNEL); | |
260 | ||
261 | for (i = 0; i < hotkey_num; i++) { | |
262 | dell_new_wmi_keymap[i].type = KE_KEY; | |
263 | dell_new_wmi_keymap[i].code = table->keymap[i].scancode; | |
264 | dell_new_wmi_keymap[i].keycode = | |
265 | (table->keymap[i].keycode > 255) ? 0 : | |
266 | bios_to_linux_keycode[table->keymap[i].keycode]; | |
267 | } | |
268 | ||
269 | dell_new_wmi_keymap[i].type = KE_END; | |
270 | dell_new_wmi_keymap[i].code = 0; | |
271 | dell_new_wmi_keymap[i].keycode = 0; | |
272 | ||
273 | dell_wmi_keymap = dell_new_wmi_keymap; | |
274 | ||
275 | } | |
276 | ||
277 | ||
278 | static void find_hk_type(const struct dmi_header *dm, void *dummy) | |
279 | { | |
280 | ||
281 | if ((dm->type == 0xb2) && (dm->length > 6)) { | |
282 | dell_new_hk_type = true; | |
283 | setup_new_hk_map(dm); | |
284 | } | |
285 | ||
286 | } | |
287 | ||
288 | ||
0b3f6109 MG |
289 | static int __init dell_wmi_input_setup(void) |
290 | { | |
291 | struct key_entry *key; | |
292 | int err; | |
293 | ||
294 | dell_wmi_input_dev = input_allocate_device(); | |
295 | ||
296 | if (!dell_wmi_input_dev) | |
297 | return -ENOMEM; | |
298 | ||
299 | dell_wmi_input_dev->name = "Dell WMI hotkeys"; | |
300 | dell_wmi_input_dev->phys = "wmi/input0"; | |
301 | dell_wmi_input_dev->id.bustype = BUS_HOST; | |
302 | dell_wmi_input_dev->getkeycode = dell_wmi_getkeycode; | |
303 | dell_wmi_input_dev->setkeycode = dell_wmi_setkeycode; | |
304 | ||
305 | for (key = dell_wmi_keymap; key->type != KE_END; key++) { | |
306 | switch (key->type) { | |
307 | case KE_KEY: | |
308 | set_bit(EV_KEY, dell_wmi_input_dev->evbit); | |
309 | set_bit(key->keycode, dell_wmi_input_dev->keybit); | |
310 | break; | |
311 | case KE_SW: | |
312 | set_bit(EV_SW, dell_wmi_input_dev->evbit); | |
313 | set_bit(key->keycode, dell_wmi_input_dev->swbit); | |
314 | break; | |
315 | } | |
316 | } | |
317 | ||
318 | err = input_register_device(dell_wmi_input_dev); | |
319 | ||
320 | if (err) { | |
321 | input_free_device(dell_wmi_input_dev); | |
322 | return err; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int __init dell_wmi_init(void) | |
329 | { | |
330 | int err; | |
abb631bf | 331 | acpi_status status; |
0b3f6109 | 332 | |
7a9568f5 | 333 | if (!wmi_has_guid(DELL_EVENT_GUID)) { |
1fdd407f DT |
334 | printk(KERN_WARNING "dell-wmi: No known WMI GUID found\n"); |
335 | return -ENODEV; | |
336 | } | |
5ea25597 | 337 | |
1fdd407f DT |
338 | dmi_walk(find_hk_type, NULL); |
339 | acpi_video = acpi_video_backlight_support(); | |
0b3f6109 | 340 | |
1fdd407f DT |
341 | err = dell_wmi_input_setup(); |
342 | if (err) | |
343 | return err; | |
5ea25597 | 344 | |
abb631bf | 345 | status = wmi_install_notify_handler(DELL_EVENT_GUID, |
1fdd407f | 346 | dell_wmi_notify, NULL); |
abb631bf | 347 | if (ACPI_FAILURE(status)) { |
1fdd407f DT |
348 | input_unregister_device(dell_wmi_input_dev); |
349 | printk(KERN_ERR | |
350 | "dell-wmi: Unable to register notify handler - %d\n", | |
abb631bf LB |
351 | status); |
352 | return -ENODEV; | |
1fdd407f | 353 | } |
0b3f6109 MG |
354 | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static void __exit dell_wmi_exit(void) | |
359 | { | |
1fdd407f DT |
360 | wmi_remove_notify_handler(DELL_EVENT_GUID); |
361 | input_unregister_device(dell_wmi_input_dev); | |
0b3f6109 MG |
362 | } |
363 | ||
364 | module_init(dell_wmi_init); | |
365 | module_exit(dell_wmi_exit); |