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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 | |
52 | ||
53 | static int __init hp_wmi_bios_setup(struct platform_device *device); | |
54 | static int __exit hp_wmi_bios_remove(struct platform_device *device); | |
55 | ||
56 | struct bios_args { | |
57 | u32 signature; | |
58 | u32 command; | |
59 | u32 commandtype; | |
60 | u32 datasize; | |
61 | u32 data; | |
62 | }; | |
63 | ||
64 | struct bios_return { | |
65 | u32 sigpass; | |
66 | u32 return_code; | |
67 | u32 value; | |
68 | }; | |
69 | ||
70 | struct key_entry { | |
71 | char type; /* See KE_* below */ | |
72 | u8 code; | |
73 | u16 keycode; | |
74 | }; | |
75 | ||
76 | enum { KE_KEY, KE_SW, KE_END }; | |
77 | ||
78 | static struct key_entry hp_wmi_keymap[] = { | |
79 | {KE_SW, 0x01, SW_DOCK}, | |
80 | {KE_KEY, 0x02, KEY_BRIGHTNESSUP}, | |
81 | {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN}, | |
82 | {KE_KEY, 0x04, KEY_HELP}, | |
83 | {KE_END, 0} | |
84 | }; | |
85 | ||
86 | static struct input_dev *hp_wmi_input_dev; | |
87 | static struct platform_device *hp_wmi_platform_dev; | |
88 | ||
89 | static struct rfkill *wifi_rfkill; | |
90 | static struct rfkill *bluetooth_rfkill; | |
91 | static struct rfkill *wwan_rfkill; | |
92 | ||
93 | static struct platform_driver hp_wmi_driver = { | |
94 | .driver = { | |
95 | .name = "hp-wmi", | |
96 | .owner = THIS_MODULE, | |
97 | }, | |
98 | .probe = hp_wmi_bios_setup, | |
99 | .remove = hp_wmi_bios_remove, | |
100 | }; | |
101 | ||
102 | static int hp_wmi_perform_query(int query, int write, int value) | |
103 | { | |
104 | struct bios_return bios_return; | |
105 | acpi_status status; | |
106 | union acpi_object *obj; | |
107 | struct bios_args args = { | |
108 | .signature = 0x55434553, | |
109 | .command = write ? 0x2 : 0x1, | |
110 | .commandtype = query, | |
111 | .datasize = write ? 0x4 : 0, | |
112 | .data = value, | |
113 | }; | |
114 | struct acpi_buffer input = { sizeof(struct bios_args), &args }; | |
115 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
116 | ||
117 | status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output); | |
118 | ||
119 | obj = output.pointer; | |
120 | ||
121 | if (!obj || obj->type != ACPI_TYPE_BUFFER) | |
122 | return -EINVAL; | |
123 | ||
124 | bios_return = *((struct bios_return *)obj->buffer.pointer); | |
125 | if (bios_return.return_code > 0) | |
126 | return bios_return.return_code * -1; | |
127 | else | |
128 | return bios_return.value; | |
129 | } | |
130 | ||
131 | static int hp_wmi_display_state(void) | |
132 | { | |
133 | return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0); | |
134 | } | |
135 | ||
136 | static int hp_wmi_hddtemp_state(void) | |
137 | { | |
138 | return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0); | |
139 | } | |
140 | ||
141 | static int hp_wmi_als_state(void) | |
142 | { | |
143 | return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0); | |
144 | } | |
145 | ||
146 | static int hp_wmi_dock_state(void) | |
147 | { | |
148 | return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0); | |
149 | } | |
150 | ||
151 | static int hp_wmi_wifi_set(void *data, enum rfkill_state state) | |
152 | { | |
153 | if (state) | |
154 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101); | |
155 | else | |
156 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100); | |
157 | } | |
158 | ||
159 | static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state) | |
160 | { | |
161 | if (state) | |
162 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202); | |
163 | else | |
164 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200); | |
165 | } | |
166 | ||
167 | static int hp_wmi_wwan_set(void *data, enum rfkill_state state) | |
168 | { | |
169 | if (state) | |
170 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404); | |
171 | else | |
172 | return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400); | |
173 | } | |
174 | ||
175 | static int hp_wmi_wifi_state(void) | |
176 | { | |
177 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
178 | ||
179 | if (wireless & 0x100) | |
180 | return 1; | |
181 | else | |
182 | return 0; | |
183 | } | |
184 | ||
185 | static int hp_wmi_bluetooth_state(void) | |
186 | { | |
187 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
188 | ||
189 | if (wireless & 0x10000) | |
190 | return 1; | |
191 | else | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static int hp_wmi_wwan_state(void) | |
196 | { | |
197 | int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0); | |
198 | ||
199 | if (wireless & 0x1000000) | |
200 | return 1; | |
201 | else | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static ssize_t show_display(struct device *dev, struct device_attribute *attr, | |
206 | char *buf) | |
207 | { | |
208 | int value = hp_wmi_display_state(); | |
209 | if (value < 0) | |
210 | return -EINVAL; | |
211 | return sprintf(buf, "%d\n", value); | |
212 | } | |
213 | ||
214 | static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr, | |
215 | char *buf) | |
216 | { | |
217 | int value = hp_wmi_hddtemp_state(); | |
218 | if (value < 0) | |
219 | return -EINVAL; | |
220 | return sprintf(buf, "%d\n", value); | |
221 | } | |
222 | ||
223 | static ssize_t show_als(struct device *dev, struct device_attribute *attr, | |
224 | char *buf) | |
225 | { | |
226 | int value = hp_wmi_als_state(); | |
227 | if (value < 0) | |
228 | return -EINVAL; | |
229 | return sprintf(buf, "%d\n", value); | |
230 | } | |
231 | ||
232 | static ssize_t show_dock(struct device *dev, struct device_attribute *attr, | |
233 | char *buf) | |
234 | { | |
235 | int value = hp_wmi_dock_state(); | |
236 | if (value < 0) | |
237 | return -EINVAL; | |
238 | return sprintf(buf, "%d\n", value); | |
239 | } | |
240 | ||
241 | static ssize_t set_als(struct device *dev, struct device_attribute *attr, | |
242 | const char *buf, size_t count) | |
243 | { | |
244 | u32 tmp = simple_strtoul(buf, NULL, 10); | |
245 | hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp); | |
246 | return count; | |
247 | } | |
248 | ||
249 | static DEVICE_ATTR(display, S_IRUGO, show_display, NULL); | |
250 | static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL); | |
251 | static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als); | |
252 | static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL); | |
253 | ||
254 | static struct key_entry *hp_wmi_get_entry_by_scancode(int code) | |
255 | { | |
256 | struct key_entry *key; | |
257 | ||
258 | for (key = hp_wmi_keymap; key->type != KE_END; key++) | |
259 | if (code == key->code) | |
260 | return key; | |
261 | ||
262 | return NULL; | |
263 | } | |
264 | ||
265 | static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode) | |
266 | { | |
267 | struct key_entry *key; | |
268 | ||
269 | for (key = hp_wmi_keymap; key->type != KE_END; key++) | |
270 | if (key->type == KE_KEY && keycode == key->keycode) | |
271 | return key; | |
272 | ||
273 | return NULL; | |
274 | } | |
275 | ||
276 | static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode) | |
277 | { | |
278 | struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode); | |
279 | ||
280 | if (key && key->type == KE_KEY) { | |
281 | *keycode = key->keycode; | |
282 | return 0; | |
283 | } | |
284 | ||
285 | return -EINVAL; | |
286 | } | |
287 | ||
288 | static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode) | |
289 | { | |
290 | struct key_entry *key; | |
291 | int old_keycode; | |
292 | ||
293 | if (keycode < 0 || keycode > KEY_MAX) | |
294 | return -EINVAL; | |
295 | ||
296 | key = hp_wmi_get_entry_by_scancode(scancode); | |
297 | if (key && key->type == KE_KEY) { | |
298 | old_keycode = key->keycode; | |
299 | key->keycode = keycode; | |
300 | set_bit(keycode, dev->keybit); | |
301 | if (!hp_wmi_get_entry_by_keycode(old_keycode)) | |
302 | clear_bit(old_keycode, dev->keybit); | |
303 | return 0; | |
304 | } | |
305 | ||
306 | return -EINVAL; | |
307 | } | |
308 | ||
309 | void hp_wmi_notify(u32 value, void *context) | |
310 | { | |
311 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
312 | static struct key_entry *key; | |
313 | union acpi_object *obj; | |
314 | ||
315 | wmi_get_event_data(value, &response); | |
316 | ||
317 | obj = (union acpi_object *)response.pointer; | |
318 | ||
319 | if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) { | |
320 | int eventcode = *((u8 *) obj->buffer.pointer); | |
321 | key = hp_wmi_get_entry_by_scancode(eventcode); | |
322 | if (key) { | |
323 | switch (key->type) { | |
324 | case KE_KEY: | |
325 | input_report_key(hp_wmi_input_dev, | |
326 | key->keycode, 1); | |
327 | input_sync(hp_wmi_input_dev); | |
328 | input_report_key(hp_wmi_input_dev, | |
329 | key->keycode, 0); | |
330 | input_sync(hp_wmi_input_dev); | |
331 | break; | |
332 | case KE_SW: | |
333 | input_report_switch(hp_wmi_input_dev, | |
334 | key->keycode, | |
335 | hp_wmi_dock_state()); | |
336 | input_sync(hp_wmi_input_dev); | |
337 | break; | |
338 | } | |
339 | } else if (eventcode == 0x5) { | |
340 | if (wifi_rfkill) | |
341 | wifi_rfkill->state = hp_wmi_wifi_state(); | |
342 | if (bluetooth_rfkill) | |
343 | bluetooth_rfkill->state = | |
344 | hp_wmi_bluetooth_state(); | |
345 | if (wwan_rfkill) | |
346 | wwan_rfkill->state = hp_wmi_wwan_state(); | |
347 | } else | |
348 | printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n", | |
349 | eventcode); | |
350 | } else | |
351 | printk(KERN_INFO "HP WMI: Unknown response received\n"); | |
352 | } | |
353 | ||
354 | static int __init hp_wmi_input_setup(void) | |
355 | { | |
356 | struct key_entry *key; | |
357 | int err; | |
358 | ||
359 | hp_wmi_input_dev = input_allocate_device(); | |
360 | ||
361 | hp_wmi_input_dev->name = "HP WMI hotkeys"; | |
362 | hp_wmi_input_dev->phys = "wmi/input0"; | |
363 | hp_wmi_input_dev->id.bustype = BUS_HOST; | |
364 | hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode; | |
365 | hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode; | |
366 | ||
367 | for (key = hp_wmi_keymap; key->type != KE_END; key++) { | |
368 | switch (key->type) { | |
369 | case KE_KEY: | |
370 | set_bit(EV_KEY, hp_wmi_input_dev->evbit); | |
371 | set_bit(key->keycode, hp_wmi_input_dev->keybit); | |
372 | break; | |
373 | case KE_SW: | |
374 | set_bit(EV_SW, hp_wmi_input_dev->evbit); | |
375 | set_bit(key->keycode, hp_wmi_input_dev->swbit); | |
376 | break; | |
377 | } | |
378 | } | |
379 | ||
380 | err = input_register_device(hp_wmi_input_dev); | |
381 | ||
382 | if (err) { | |
383 | input_free_device(hp_wmi_input_dev); | |
384 | return err; | |
385 | } | |
386 | ||
387 | return 0; | |
388 | } | |
389 | ||
390 | static void cleanup_sysfs(struct platform_device *device) | |
391 | { | |
392 | device_remove_file(&device->dev, &dev_attr_display); | |
393 | device_remove_file(&device->dev, &dev_attr_hddtemp); | |
394 | device_remove_file(&device->dev, &dev_attr_als); | |
395 | device_remove_file(&device->dev, &dev_attr_dock); | |
396 | } | |
397 | ||
398 | static int __init hp_wmi_bios_setup(struct platform_device *device) | |
399 | { | |
400 | int err; | |
401 | ||
402 | err = device_create_file(&device->dev, &dev_attr_display); | |
403 | if (err) | |
404 | goto add_sysfs_error; | |
405 | err = device_create_file(&device->dev, &dev_attr_hddtemp); | |
406 | if (err) | |
407 | goto add_sysfs_error; | |
408 | err = device_create_file(&device->dev, &dev_attr_als); | |
409 | if (err) | |
410 | goto add_sysfs_error; | |
411 | err = device_create_file(&device->dev, &dev_attr_dock); | |
412 | if (err) | |
413 | goto add_sysfs_error; | |
414 | ||
415 | wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN); | |
416 | wifi_rfkill->name = "hp-wifi"; | |
417 | wifi_rfkill->state = hp_wmi_wifi_state(); | |
418 | wifi_rfkill->toggle_radio = hp_wmi_wifi_set; | |
419 | wifi_rfkill->user_claim_unsupported = 1; | |
420 | ||
421 | bluetooth_rfkill = rfkill_allocate(&device->dev, | |
422 | RFKILL_TYPE_BLUETOOTH); | |
423 | bluetooth_rfkill->name = "hp-bluetooth"; | |
424 | bluetooth_rfkill->state = hp_wmi_bluetooth_state(); | |
425 | bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set; | |
426 | bluetooth_rfkill->user_claim_unsupported = 1; | |
427 | ||
428 | wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WIMAX); | |
429 | wwan_rfkill->name = "hp-wwan"; | |
430 | wwan_rfkill->state = hp_wmi_wwan_state(); | |
431 | wwan_rfkill->toggle_radio = hp_wmi_wwan_set; | |
432 | wwan_rfkill->user_claim_unsupported = 1; | |
433 | ||
434 | rfkill_register(wifi_rfkill); | |
435 | rfkill_register(bluetooth_rfkill); | |
436 | rfkill_register(wwan_rfkill); | |
437 | ||
438 | return 0; | |
439 | add_sysfs_error: | |
440 | cleanup_sysfs(device); | |
441 | return err; | |
442 | } | |
443 | ||
444 | static int __exit hp_wmi_bios_remove(struct platform_device *device) | |
445 | { | |
446 | cleanup_sysfs(device); | |
447 | ||
448 | rfkill_unregister(wifi_rfkill); | |
449 | rfkill_unregister(bluetooth_rfkill); | |
450 | rfkill_unregister(wwan_rfkill); | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | static int __init hp_wmi_init(void) | |
456 | { | |
457 | int err; | |
458 | ||
459 | if (wmi_has_guid(HPWMI_EVENT_GUID)) { | |
460 | err = wmi_install_notify_handler(HPWMI_EVENT_GUID, | |
461 | hp_wmi_notify, NULL); | |
462 | if (!err) | |
463 | hp_wmi_input_setup(); | |
464 | } | |
465 | ||
466 | if (wmi_has_guid(HPWMI_BIOS_GUID)) { | |
467 | err = platform_driver_register(&hp_wmi_driver); | |
468 | if (err) | |
469 | return 0; | |
470 | hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1); | |
471 | if (!hp_wmi_platform_dev) { | |
472 | platform_driver_unregister(&hp_wmi_driver); | |
473 | return 0; | |
474 | } | |
475 | platform_device_add(hp_wmi_platform_dev); | |
476 | } | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static void __exit hp_wmi_exit(void) | |
482 | { | |
483 | if (wmi_has_guid(HPWMI_EVENT_GUID)) { | |
484 | wmi_remove_notify_handler(HPWMI_EVENT_GUID); | |
485 | input_unregister_device(hp_wmi_input_dev); | |
486 | } | |
487 | if (hp_wmi_platform_dev) { | |
488 | platform_device_del(hp_wmi_platform_dev); | |
489 | platform_driver_unregister(&hp_wmi_driver); | |
490 | } | |
491 | } | |
492 | ||
493 | module_init(hp_wmi_init); | |
494 | module_exit(hp_wmi_exit); |