diff options
Diffstat (limited to 'drivers/misc/hp-wmi.c')
-rw-r--r-- | drivers/misc/hp-wmi.c | 494 |
1 files changed, 494 insertions, 0 deletions
diff --git a/drivers/misc/hp-wmi.c b/drivers/misc/hp-wmi.c new file mode 100644 index 000000000000..1dbcbcb323a2 --- /dev/null +++ b/drivers/misc/hp-wmi.c | |||
@@ -0,0 +1,494 @@ | |||
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); | ||