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62ec30d4 MG |
1 | /* |
2 | * HP 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> | |
29 | #include <linux/types.h> | |
30 | #include <linux/input.h> | |
31 | #include <acpi/acpi_drivers.h> | |
32 | #include <linux/platform_device.h> | |
33 | #include <linux/acpi.h> | |
34 | #include <linux/rfkill.h> | |
35 | #include <linux/string.h> | |
36 | ||
37 | MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>"); | |
38 | MODULE_DESCRIPTION("HP laptop WMI hotkeys driver"); | |
39 | MODULE_LICENSE("GPL"); | |
40 | ||
41 | MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C"); | |
42 | MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4"); | |
43 | ||
44 | #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C" | |
45 | #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4" | |
46 | ||
47 | #define HPWMI_DISPLAY_QUERY 0x1 | |
48 | #define HPWMI_HDDTEMP_QUERY 0x2 | |
49 | #define HPWMI_ALS_QUERY 0x3 | |
50 | #define HPWMI_DOCK_QUERY 0x4 | |
51 | #define HPWMI_WIRELESS_QUERY 0x5 | |
a8823aef | 52 | #define HPWMI_HOTKEY_QUERY 0xc |
62ec30d4 MG |
53 | |
54 | static int __init hp_wmi_bios_setup(struct platform_device *device); | |
55 | static int __exit hp_wmi_bios_remove(struct platform_device *device); | |
56 | ||
57 | struct bios_args { | |
58 | u32 signature; | |
59 | u32 command; | |
60 | u32 commandtype; | |
61 | u32 datasize; | |
62 | u32 data; | |
63 | }; | |
64 | ||
65 | struct bios_return { | |
66 | u32 sigpass; | |
67 | u32 return_code; | |
68 | u32 value; | |
69 | }; | |
70 | ||
71 | struct key_entry { | |
72 | char type; /* See KE_* below */ | |
a8823aef | 73 | u16 code; |
62ec30d4 MG |
74 | u16 keycode; |
75 | }; | |
76 | ||
77 | enum { KE_KEY, KE_SW, KE_END }; | |
78 | ||
79 | static struct key_entry hp_wmi_keymap[] = { | |
80 | {KE_SW, 0x01, SW_DOCK}, | |
81 | {KE_KEY, 0x02, KEY_BRIGHTNESSUP}, | |
82 | {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN}, | |
a8823aef MG |
83 | {KE_KEY, 0x20e6, KEY_PROG1}, |
84 | {KE_KEY, 0x2142, KEY_MEDIA}, | |
5c624841 | 85 | {KE_KEY, 0x213b, KEY_INFO}, |
a8823aef | 86 | {KE_KEY, 0x231b, KEY_HELP}, |
62ec30d4 MG |
87 | {KE_END, 0} |
88 | }; | |
89 | ||
90 | static struct input_dev *hp_wmi_input_dev; | |
91 | static struct platform_device *hp_wmi_platform_dev; | |
92 | ||
93 | static struct rfkill *wifi_rfkill; | |
94 | static struct rfkill *bluetooth_rfkill; | |
95 | static struct rfkill *wwan_rfkill; | |
96 | ||
97 | static struct platform_driver hp_wmi_driver = { | |
98 | .driver = { | |
99 | .name = "hp-wmi", | |
100 | .owner = THIS_MODULE, | |
101 | }, | |
102 | .probe = hp_wmi_bios_setup, | |
103 | .remove = hp_wmi_bios_remove, | |
104 | }; | |
105 | ||
106 | static int hp_wmi_perform_query(int query, int write, int value) | |
107 | { | |
108 | struct bios_return bios_return; | |
109 | acpi_status status; | |
110 | union acpi_object *obj; | |
111 | struct bios_args args = { | |
112 | .signature = 0x55434553, | |
113 | .command = write ? 0x2 : 0x1, | |
114 | .commandtype = query, | |
115 | .datasize = write ? 0x4 : 0, | |
116 | .data = value, | |
117 | }; | |
118 | struct acpi_buffer input = { sizeof(struct bios_args), &args }; | |
119 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
120 | ||
121 | status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output); | |
122 | ||
123 | obj = output.pointer; | |
124 | ||
125 | if (!obj || obj->type != ACPI_TYPE_BUFFER) | |
126 | return -EINVAL; | |
127 | ||
128 | bios_return = *((struct bios_return *)obj->buffer.pointer); | |
129 | if (bios_return.return_code > 0) | |
130 | return bios_return.return_code * -1; | |
131 | else | |
132 | return bios_return.value; | |
133 | } | |
134 | ||
135 | static int hp_wmi_display_state(void) | |
136 | { | |
137 | return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0); | |
138 | } | |
139 | ||
140 | static int hp_wmi_hddtemp_state(void) | |
141 | { | |
142 | return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0); | |
143 | } | |
144 | ||
145 | static int hp_wmi_als_state(void) | |
146 | { | |
147 | return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0); | |
148 | } | |
149 | ||
150 | static int hp_wmi_dock_state(void) | |
151 | { | |
152 | return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0); | |
153 | } | |
154 | ||
155 | static int hp_wmi_wifi_set(void *data, enum rfkill_state state) | |
156 | { | |
157 | if (state) | |
158 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101); | |
159 | else | |
160 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100); | |
161 | } | |
162 | ||
163 | static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state) | |
164 | { | |
165 | if (state) | |
166 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202); | |
167 | else | |
168 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200); | |
169 | } | |
170 | ||
171 | static int hp_wmi_wwan_set(void *data, enum rfkill_state state) | |
172 | { | |
173 | if (state) | |
174 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404); | |
175 | else | |
176 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400); | |
177 | } | |
178 | ||
179 | static int hp_wmi_wifi_state(void) | |
180 | { | |
181 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
182 | ||
183 | if (wireless & 0x100) | |
3f6e2f13 | 184 | return RFKILL_STATE_UNBLOCKED; |
62ec30d4 | 185 | else |
3f6e2f13 | 186 | return RFKILL_STATE_SOFT_BLOCKED; |
62ec30d4 MG |
187 | } |
188 | ||
189 | static int hp_wmi_bluetooth_state(void) | |
190 | { | |
191 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
192 | ||
193 | if (wireless & 0x10000) | |
3f6e2f13 | 194 | return RFKILL_STATE_UNBLOCKED; |
62ec30d4 | 195 | else |
3f6e2f13 | 196 | return RFKILL_STATE_SOFT_BLOCKED; |
62ec30d4 MG |
197 | } |
198 | ||
199 | static int hp_wmi_wwan_state(void) | |
200 | { | |
201 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
202 | ||
203 | if (wireless & 0x1000000) | |
3f6e2f13 | 204 | return RFKILL_STATE_UNBLOCKED; |
62ec30d4 | 205 | else |
3f6e2f13 | 206 | return RFKILL_STATE_SOFT_BLOCKED; |
62ec30d4 MG |
207 | } |
208 | ||
209 | static ssize_t show_display(struct device *dev, struct device_attribute *attr, | |
210 | char *buf) | |
211 | { | |
212 | int value = hp_wmi_display_state(); | |
213 | if (value < 0) | |
214 | return -EINVAL; | |
215 | return sprintf(buf, "%d\n", value); | |
216 | } | |
217 | ||
218 | static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr, | |
219 | char *buf) | |
220 | { | |
221 | int value = hp_wmi_hddtemp_state(); | |
222 | if (value < 0) | |
223 | return -EINVAL; | |
224 | return sprintf(buf, "%d\n", value); | |
225 | } | |
226 | ||
227 | static ssize_t show_als(struct device *dev, struct device_attribute *attr, | |
228 | char *buf) | |
229 | { | |
230 | int value = hp_wmi_als_state(); | |
231 | if (value < 0) | |
232 | return -EINVAL; | |
233 | return sprintf(buf, "%d\n", value); | |
234 | } | |
235 | ||
236 | static ssize_t show_dock(struct device *dev, struct device_attribute *attr, | |
237 | char *buf) | |
238 | { | |
239 | int value = hp_wmi_dock_state(); | |
240 | if (value < 0) | |
241 | return -EINVAL; | |
242 | return sprintf(buf, "%d\n", value); | |
243 | } | |
244 | ||
245 | static ssize_t set_als(struct device *dev, struct device_attribute *attr, | |
246 | const char *buf, size_t count) | |
247 | { | |
248 | u32 tmp = simple_strtoul(buf, NULL, 10); | |
249 | hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp); | |
250 | return count; | |
251 | } | |
252 | ||
253 | static DEVICE_ATTR(display, S_IRUGO, show_display, NULL); | |
254 | static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL); | |
255 | static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als); | |
256 | static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL); | |
257 | ||
258 | static struct key_entry *hp_wmi_get_entry_by_scancode(int code) | |
259 | { | |
260 | struct key_entry *key; | |
261 | ||
262 | for (key = hp_wmi_keymap; key->type != KE_END; key++) | |
263 | if (code == key->code) | |
264 | return key; | |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
269 | static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode) | |
270 | { | |
271 | struct key_entry *key; | |
272 | ||
273 | for (key = hp_wmi_keymap; key->type != KE_END; key++) | |
274 | if (key->type == KE_KEY && keycode == key->keycode) | |
275 | return key; | |
276 | ||
277 | return NULL; | |
278 | } | |
279 | ||
280 | static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode) | |
281 | { | |
282 | struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode); | |
283 | ||
284 | if (key && key->type == KE_KEY) { | |
285 | *keycode = key->keycode; | |
286 | return 0; | |
287 | } | |
288 | ||
289 | return -EINVAL; | |
290 | } | |
291 | ||
292 | static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) | |
293 | { | |
294 | struct key_entry *key; | |
295 | int old_keycode; | |
296 | ||
297 | if (keycode < 0 || keycode > KEY_MAX) | |
298 | return -EINVAL; | |
299 | ||
300 | key = hp_wmi_get_entry_by_scancode(scancode); | |
301 | if (key && key->type == KE_KEY) { | |
302 | old_keycode = key->keycode; | |
303 | key->keycode = keycode; | |
304 | set_bit(keycode, dev->keybit); | |
305 | if (!hp_wmi_get_entry_by_keycode(old_keycode)) | |
306 | clear_bit(old_keycode, dev->keybit); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | return -EINVAL; | |
311 | } | |
312 | ||
88429a10 | 313 | static void hp_wmi_notify(u32 value, void *context) |
62ec30d4 MG |
314 | { |
315 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
316 | static struct key_entry *key; | |
317 | union acpi_object *obj; | |
318 | ||
319 | wmi_get_event_data(value, &response); | |
320 | ||
321 | obj = (union acpi_object *)response.pointer; | |
322 | ||
323 | if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) { | |
324 | int eventcode = *((u8 *) obj->buffer.pointer); | |
a8823aef MG |
325 | if (eventcode == 0x4) |
326 | eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0, | |
327 | 0); | |
62ec30d4 MG |
328 | key = hp_wmi_get_entry_by_scancode(eventcode); |
329 | if (key) { | |
330 | switch (key->type) { | |
331 | case KE_KEY: | |
332 | input_report_key(hp_wmi_input_dev, | |
333 | key->keycode, 1); | |
334 | input_sync(hp_wmi_input_dev); | |
335 | input_report_key(hp_wmi_input_dev, | |
336 | key->keycode, 0); | |
337 | input_sync(hp_wmi_input_dev); | |
338 | break; | |
339 | case KE_SW: | |
340 | input_report_switch(hp_wmi_input_dev, | |
341 | key->keycode, | |
342 | hp_wmi_dock_state()); | |
343 | input_sync(hp_wmi_input_dev); | |
344 | break; | |
345 | } | |
346 | } else if (eventcode == 0x5) { | |
347 | if (wifi_rfkill) | |
3f6e2f13 MG |
348 | rfkill_force_state(wifi_rfkill, |
349 | hp_wmi_wifi_state()); | |
62ec30d4 | 350 | if (bluetooth_rfkill) |
3f6e2f13 MG |
351 | rfkill_force_state(bluetooth_rfkill, |
352 | hp_wmi_bluetooth_state()); | |
62ec30d4 | 353 | if (wwan_rfkill) |
3f6e2f13 MG |
354 | rfkill_force_state(wwan_rfkill, |
355 | hp_wmi_wwan_state()); | |
62ec30d4 MG |
356 | } else |
357 | printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n", | |
358 | eventcode); | |
359 | } else | |
360 | printk(KERN_INFO "HP WMI: Unknown response received\n"); | |
361 | } | |
362 | ||
363 | static int __init hp_wmi_input_setup(void) | |
364 | { | |
365 | struct key_entry *key; | |
366 | int err; | |
367 | ||
368 | hp_wmi_input_dev = input_allocate_device(); | |
369 | ||
370 | hp_wmi_input_dev->name = "HP WMI hotkeys"; | |
371 | hp_wmi_input_dev->phys = "wmi/input0"; | |
372 | hp_wmi_input_dev->id.bustype = BUS_HOST; | |
373 | hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode; | |
374 | hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode; | |
375 | ||
376 | for (key = hp_wmi_keymap; key->type != KE_END; key++) { | |
377 | switch (key->type) { | |
378 | case KE_KEY: | |
379 | set_bit(EV_KEY, hp_wmi_input_dev->evbit); | |
380 | set_bit(key->keycode, hp_wmi_input_dev->keybit); | |
381 | break; | |
382 | case KE_SW: | |
383 | set_bit(EV_SW, hp_wmi_input_dev->evbit); | |
384 | set_bit(key->keycode, hp_wmi_input_dev->swbit); | |
385 | break; | |
386 | } | |
387 | } | |
388 | ||
389 | err = input_register_device(hp_wmi_input_dev); | |
390 | ||
391 | if (err) { | |
392 | input_free_device(hp_wmi_input_dev); | |
393 | return err; | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | static void cleanup_sysfs(struct platform_device *device) | |
400 | { | |
401 | device_remove_file(&device->dev, &dev_attr_display); | |
402 | device_remove_file(&device->dev, &dev_attr_hddtemp); | |
403 | device_remove_file(&device->dev, &dev_attr_als); | |
404 | device_remove_file(&device->dev, &dev_attr_dock); | |
405 | } | |
406 | ||
407 | static int __init hp_wmi_bios_setup(struct platform_device *device) | |
408 | { | |
409 | int err; | |
3f6e2f13 | 410 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); |
62ec30d4 MG |
411 | |
412 | err = device_create_file(&device->dev, &dev_attr_display); | |
413 | if (err) | |
414 | goto add_sysfs_error; | |
415 | err = device_create_file(&device->dev, &dev_attr_hddtemp); | |
416 | if (err) | |
417 | goto add_sysfs_error; | |
418 | err = device_create_file(&device->dev, &dev_attr_als); | |
419 | if (err) | |
420 | goto add_sysfs_error; | |
421 | err = device_create_file(&device->dev, &dev_attr_dock); | |
422 | if (err) | |
423 | goto add_sysfs_error; | |
424 | ||
3f6e2f13 MG |
425 | if (wireless & 0x1) { |
426 | wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN); | |
427 | wifi_rfkill->name = "hp-wifi"; | |
428 | wifi_rfkill->state = hp_wmi_wifi_state(); | |
429 | wifi_rfkill->toggle_radio = hp_wmi_wifi_set; | |
430 | wifi_rfkill->user_claim_unsupported = 1; | |
fe8e4e03 LF |
431 | err = rfkill_register(wifi_rfkill); |
432 | if (err) | |
433 | goto add_sysfs_error; | |
3f6e2f13 MG |
434 | } |
435 | ||
436 | if (wireless & 0x2) { | |
437 | bluetooth_rfkill = rfkill_allocate(&device->dev, | |
438 | RFKILL_TYPE_BLUETOOTH); | |
439 | bluetooth_rfkill->name = "hp-bluetooth"; | |
440 | bluetooth_rfkill->state = hp_wmi_bluetooth_state(); | |
441 | bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set; | |
442 | bluetooth_rfkill->user_claim_unsupported = 1; | |
fe8e4e03 LF |
443 | err = rfkill_register(bluetooth_rfkill); |
444 | goto register_bluetooth_error; | |
3f6e2f13 MG |
445 | } |
446 | ||
447 | if (wireless & 0x4) { | |
448 | wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN); | |
449 | wwan_rfkill->name = "hp-wwan"; | |
450 | wwan_rfkill->state = hp_wmi_wwan_state(); | |
451 | wwan_rfkill->toggle_radio = hp_wmi_wwan_set; | |
452 | wwan_rfkill->user_claim_unsupported = 1; | |
fe8e4e03 LF |
453 | err = rfkill_register(wwan_rfkill); |
454 | if (err) | |
455 | goto register_wwan_err; | |
3f6e2f13 | 456 | } |
62ec30d4 MG |
457 | |
458 | return 0; | |
fe8e4e03 LF |
459 | register_wwan_err: |
460 | rfkill_unregister(bluetooth_rfkill); | |
461 | register_bluetooth_error: | |
462 | rfkill_unregister(wifi_rfkill); | |
62ec30d4 MG |
463 | add_sysfs_error: |
464 | cleanup_sysfs(device); | |
465 | return err; | |
466 | } | |
467 | ||
468 | static int __exit hp_wmi_bios_remove(struct platform_device *device) | |
469 | { | |
470 | cleanup_sysfs(device); | |
471 | ||
3f6e2f13 MG |
472 | if (wifi_rfkill) |
473 | rfkill_unregister(wifi_rfkill); | |
474 | if (bluetooth_rfkill) | |
475 | rfkill_unregister(bluetooth_rfkill); | |
476 | if (wwan_rfkill) | |
477 | rfkill_unregister(wwan_rfkill); | |
62ec30d4 MG |
478 | |
479 | return 0; | |
480 | } | |
481 | ||
482 | static int __init hp_wmi_init(void) | |
483 | { | |
484 | int err; | |
485 | ||
486 | if (wmi_has_guid(HPWMI_EVENT_GUID)) { | |
487 | err = wmi_install_notify_handler(HPWMI_EVENT_GUID, | |
488 | hp_wmi_notify, NULL); | |
489 | if (!err) | |
490 | hp_wmi_input_setup(); | |
491 | } | |
492 | ||
493 | if (wmi_has_guid(HPWMI_BIOS_GUID)) { | |
494 | err = platform_driver_register(&hp_wmi_driver); | |
495 | if (err) | |
496 | return 0; | |
497 | hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1); | |
498 | if (!hp_wmi_platform_dev) { | |
499 | platform_driver_unregister(&hp_wmi_driver); | |
500 | return 0; | |
501 | } | |
502 | platform_device_add(hp_wmi_platform_dev); | |
503 | } | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static void __exit hp_wmi_exit(void) | |
509 | { | |
510 | if (wmi_has_guid(HPWMI_EVENT_GUID)) { | |
511 | wmi_remove_notify_handler(HPWMI_EVENT_GUID); | |
512 | input_unregister_device(hp_wmi_input_dev); | |
513 | } | |
514 | if (hp_wmi_platform_dev) { | |
515 | platform_device_del(hp_wmi_platform_dev); | |
516 | platform_driver_unregister(&hp_wmi_driver); | |
517 | } | |
518 | } | |
519 | ||
520 | module_init(hp_wmi_init); | |
521 | module_exit(hp_wmi_exit); |