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 #define HPWMI_HOTKEY_QUERY 0xc
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 */
73 u16 code;
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},
83 {KE_KEY, 0x20e6, KEY_PROG1},
84 {KE_KEY, 0x2142, KEY_MEDIA},
85 {KE_KEY, 0x213b, KEY_INFO},
86 {KE_KEY, 0x231b, KEY_HELP},
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
hp_wmi_perform_query(int query,int write,int value)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
hp_wmi_display_state(void)135 static int hp_wmi_display_state(void)
136 {
137 return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
138 }
139
hp_wmi_hddtemp_state(void)140 static int hp_wmi_hddtemp_state(void)
141 {
142 return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
143 }
144
hp_wmi_als_state(void)145 static int hp_wmi_als_state(void)
146 {
147 return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
148 }
149
hp_wmi_dock_state(void)150 static int hp_wmi_dock_state(void)
151 {
152 return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0);
153 }
154
hp_wmi_wifi_set(void * data,enum rfkill_state state)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
hp_wmi_bluetooth_set(void * data,enum rfkill_state state)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
hp_wmi_wwan_set(void * data,enum rfkill_state state)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
hp_wmi_wifi_state(void)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)
184 return RFKILL_STATE_UNBLOCKED;
185 else
186 return RFKILL_STATE_SOFT_BLOCKED;
187 }
188
hp_wmi_bluetooth_state(void)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)
194 return RFKILL_STATE_UNBLOCKED;
195 else
196 return RFKILL_STATE_SOFT_BLOCKED;
197 }
198
hp_wmi_wwan_state(void)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)
204 return RFKILL_STATE_UNBLOCKED;
205 else
206 return RFKILL_STATE_SOFT_BLOCKED;
207 }
208
show_display(struct device * dev,struct device_attribute * attr,char * buf)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
show_hddtemp(struct device * dev,struct device_attribute * attr,char * buf)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
show_als(struct device * dev,struct device_attribute * attr,char * buf)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
show_dock(struct device * dev,struct device_attribute * attr,char * buf)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
set_als(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
hp_wmi_get_entry_by_scancode(int code)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
hp_wmi_get_entry_by_keycode(int keycode)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
hp_wmi_getkeycode(struct input_dev * dev,int scancode,int * keycode)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
hp_wmi_setkeycode(struct input_dev * dev,int scancode,int keycode)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
hp_wmi_notify(u32 value,void * context)313 static void hp_wmi_notify(u32 value, void *context)
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);
325 if (eventcode == 0x4)
326 eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
327 0);
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)
348 rfkill_force_state(wifi_rfkill,
349 hp_wmi_wifi_state());
350 if (bluetooth_rfkill)
351 rfkill_force_state(bluetooth_rfkill,
352 hp_wmi_bluetooth_state());
353 if (wwan_rfkill)
354 rfkill_force_state(wwan_rfkill,
355 hp_wmi_wwan_state());
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
hp_wmi_input_setup(void)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
386 /* Set initial dock state */
387 input_report_switch(hp_wmi_input_dev, key->keycode,
388 hp_wmi_dock_state());
389 input_sync(hp_wmi_input_dev);
390 break;
391 }
392 }
393
394 err = input_register_device(hp_wmi_input_dev);
395
396 if (err) {
397 input_free_device(hp_wmi_input_dev);
398 return err;
399 }
400
401 return 0;
402 }
403
cleanup_sysfs(struct platform_device * device)404 static void cleanup_sysfs(struct platform_device *device)
405 {
406 device_remove_file(&device->dev, &dev_attr_display);
407 device_remove_file(&device->dev, &dev_attr_hddtemp);
408 device_remove_file(&device->dev, &dev_attr_als);
409 device_remove_file(&device->dev, &dev_attr_dock);
410 }
411
hp_wmi_bios_setup(struct platform_device * device)412 static int __init hp_wmi_bios_setup(struct platform_device *device)
413 {
414 int err;
415 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
416
417 err = device_create_file(&device->dev, &dev_attr_display);
418 if (err)
419 goto add_sysfs_error;
420 err = device_create_file(&device->dev, &dev_attr_hddtemp);
421 if (err)
422 goto add_sysfs_error;
423 err = device_create_file(&device->dev, &dev_attr_als);
424 if (err)
425 goto add_sysfs_error;
426 err = device_create_file(&device->dev, &dev_attr_dock);
427 if (err)
428 goto add_sysfs_error;
429
430 if (wireless & 0x1) {
431 wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
432 wifi_rfkill->name = "hp-wifi";
433 wifi_rfkill->state = hp_wmi_wifi_state();
434 wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
435 wifi_rfkill->user_claim_unsupported = 1;
436 err = rfkill_register(wifi_rfkill);
437 if (err)
438 goto add_sysfs_error;
439 }
440
441 if (wireless & 0x2) {
442 bluetooth_rfkill = rfkill_allocate(&device->dev,
443 RFKILL_TYPE_BLUETOOTH);
444 bluetooth_rfkill->name = "hp-bluetooth";
445 bluetooth_rfkill->state = hp_wmi_bluetooth_state();
446 bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
447 bluetooth_rfkill->user_claim_unsupported = 1;
448 err = rfkill_register(bluetooth_rfkill);
449 if (err)
450 goto register_bluetooth_error;
451 }
452
453 if (wireless & 0x4) {
454 wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
455 wwan_rfkill->name = "hp-wwan";
456 wwan_rfkill->state = hp_wmi_wwan_state();
457 wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
458 wwan_rfkill->user_claim_unsupported = 1;
459 err = rfkill_register(wwan_rfkill);
460 if (err)
461 goto register_wwan_err;
462 }
463
464 return 0;
465 register_wwan_err:
466 if (bluetooth_rfkill)
467 rfkill_unregister(bluetooth_rfkill);
468 register_bluetooth_error:
469 if (wifi_rfkill)
470 rfkill_unregister(wifi_rfkill);
471 add_sysfs_error:
472 cleanup_sysfs(device);
473 return err;
474 }
475
hp_wmi_bios_remove(struct platform_device * device)476 static int __exit hp_wmi_bios_remove(struct platform_device *device)
477 {
478 cleanup_sysfs(device);
479
480 if (wifi_rfkill)
481 rfkill_unregister(wifi_rfkill);
482 if (bluetooth_rfkill)
483 rfkill_unregister(bluetooth_rfkill);
484 if (wwan_rfkill)
485 rfkill_unregister(wwan_rfkill);
486
487 return 0;
488 }
489
hp_wmi_init(void)490 static int __init hp_wmi_init(void)
491 {
492 int err;
493
494 if (wmi_has_guid(HPWMI_EVENT_GUID)) {
495 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
496 hp_wmi_notify, NULL);
497 if (!err)
498 hp_wmi_input_setup();
499 }
500
501 if (wmi_has_guid(HPWMI_BIOS_GUID)) {
502 err = platform_driver_register(&hp_wmi_driver);
503 if (err)
504 return 0;
505 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
506 if (!hp_wmi_platform_dev) {
507 platform_driver_unregister(&hp_wmi_driver);
508 return 0;
509 }
510 platform_device_add(hp_wmi_platform_dev);
511 }
512
513 return 0;
514 }
515
hp_wmi_exit(void)516 static void __exit hp_wmi_exit(void)
517 {
518 if (wmi_has_guid(HPWMI_EVENT_GUID)) {
519 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
520 input_unregister_device(hp_wmi_input_dev);
521 }
522 if (hp_wmi_platform_dev) {
523 platform_device_del(hp_wmi_platform_dev);
524 platform_driver_unregister(&hp_wmi_driver);
525 }
526 }
527
528 module_init(hp_wmi_init);
529 module_exit(hp_wmi_exit);
530