ACPI: DMI to disable Vista compatibility on some Sony laptops
[linux-2.6.git] / drivers / platform / x86 / hp-wmi.c
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 static int hp_wmi_resume_handler(struct platform_device *device);
57
58 struct bios_args {
59         u32 signature;
60         u32 command;
61         u32 commandtype;
62         u32 datasize;
63         u32 data;
64 };
65
66 struct bios_return {
67         u32 sigpass;
68         u32 return_code;
69         u32 value;
70 };
71
72 struct key_entry {
73         char type;              /* See KE_* below */
74         u16 code;
75         u16 keycode;
76 };
77
78 enum { KE_KEY, KE_SW, KE_END };
79
80 static struct key_entry hp_wmi_keymap[] = {
81         {KE_SW, 0x01, SW_DOCK},
82         {KE_KEY, 0x02, KEY_BRIGHTNESSUP},
83         {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
84         {KE_KEY, 0x20e6, KEY_PROG1},
85         {KE_KEY, 0x2142, KEY_MEDIA},
86         {KE_KEY, 0x213b, KEY_INFO},
87         {KE_KEY, 0x231b, KEY_HELP},
88         {KE_END, 0}
89 };
90
91 static struct input_dev *hp_wmi_input_dev;
92 static struct platform_device *hp_wmi_platform_dev;
93
94 static struct rfkill *wifi_rfkill;
95 static struct rfkill *bluetooth_rfkill;
96 static struct rfkill *wwan_rfkill;
97
98 static struct platform_driver hp_wmi_driver = {
99         .driver = {
100                    .name = "hp-wmi",
101                    .owner = THIS_MODULE,
102         },
103         .probe = hp_wmi_bios_setup,
104         .remove = hp_wmi_bios_remove,
105         .resume = hp_wmi_resume_handler,
106 };
107
108 static int hp_wmi_perform_query(int query, int write, int value)
109 {
110         struct bios_return bios_return;
111         acpi_status status;
112         union acpi_object *obj;
113         struct bios_args args = {
114                 .signature = 0x55434553,
115                 .command = write ? 0x2 : 0x1,
116                 .commandtype = query,
117                 .datasize = write ? 0x4 : 0,
118                 .data = value,
119         };
120         struct acpi_buffer input = { sizeof(struct bios_args), &args };
121         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
122
123         status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
124
125         obj = output.pointer;
126
127         if (!obj || obj->type != ACPI_TYPE_BUFFER)
128                 return -EINVAL;
129
130         bios_return = *((struct bios_return *)obj->buffer.pointer);
131         if (bios_return.return_code > 0)
132                 return bios_return.return_code * -1;
133         else
134                 return bios_return.value;
135 }
136
137 static int hp_wmi_display_state(void)
138 {
139         return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
140 }
141
142 static int hp_wmi_hddtemp_state(void)
143 {
144         return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
145 }
146
147 static int hp_wmi_als_state(void)
148 {
149         return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
150 }
151
152 static int hp_wmi_dock_state(void)
153 {
154         return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0);
155 }
156
157 static int hp_wmi_wifi_set(void *data, enum rfkill_state state)
158 {
159         if (state)
160                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101);
161         else
162                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100);
163 }
164
165 static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state)
166 {
167         if (state)
168                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202);
169         else
170                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200);
171 }
172
173 static int hp_wmi_wwan_set(void *data, enum rfkill_state state)
174 {
175         if (state)
176                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404);
177         else
178                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400);
179 }
180
181 static int hp_wmi_wifi_state(void)
182 {
183         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
184
185         if (wireless & 0x100)
186                 return RFKILL_STATE_UNBLOCKED;
187         else
188                 return RFKILL_STATE_SOFT_BLOCKED;
189 }
190
191 static int hp_wmi_bluetooth_state(void)
192 {
193         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
194
195         if (wireless & 0x10000)
196                 return RFKILL_STATE_UNBLOCKED;
197         else
198                 return RFKILL_STATE_SOFT_BLOCKED;
199 }
200
201 static int hp_wmi_wwan_state(void)
202 {
203         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
204
205         if (wireless & 0x1000000)
206                 return RFKILL_STATE_UNBLOCKED;
207         else
208                 return RFKILL_STATE_SOFT_BLOCKED;
209 }
210
211 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
212                             char *buf)
213 {
214         int value = hp_wmi_display_state();
215         if (value < 0)
216                 return -EINVAL;
217         return sprintf(buf, "%d\n", value);
218 }
219
220 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
221                             char *buf)
222 {
223         int value = hp_wmi_hddtemp_state();
224         if (value < 0)
225                 return -EINVAL;
226         return sprintf(buf, "%d\n", value);
227 }
228
229 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
230                         char *buf)
231 {
232         int value = hp_wmi_als_state();
233         if (value < 0)
234                 return -EINVAL;
235         return sprintf(buf, "%d\n", value);
236 }
237
238 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
239                          char *buf)
240 {
241         int value = hp_wmi_dock_state();
242         if (value < 0)
243                 return -EINVAL;
244         return sprintf(buf, "%d\n", value);
245 }
246
247 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
248                        const char *buf, size_t count)
249 {
250         u32 tmp = simple_strtoul(buf, NULL, 10);
251         hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
252         return count;
253 }
254
255 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
256 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
257 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
258 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
259
260 static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
261 {
262         struct key_entry *key;
263
264         for (key = hp_wmi_keymap; key->type != KE_END; key++)
265                 if (code == key->code)
266                         return key;
267
268         return NULL;
269 }
270
271 static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
272 {
273         struct key_entry *key;
274
275         for (key = hp_wmi_keymap; key->type != KE_END; key++)
276                 if (key->type == KE_KEY && keycode == key->keycode)
277                         return key;
278
279         return NULL;
280 }
281
282 static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
283 {
284         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
285
286         if (key && key->type == KE_KEY) {
287                 *keycode = key->keycode;
288                 return 0;
289         }
290
291         return -EINVAL;
292 }
293
294 static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
295 {
296         struct key_entry *key;
297         int old_keycode;
298
299         if (keycode < 0 || keycode > KEY_MAX)
300                 return -EINVAL;
301
302         key = hp_wmi_get_entry_by_scancode(scancode);
303         if (key && key->type == KE_KEY) {
304                 old_keycode = key->keycode;
305                 key->keycode = keycode;
306                 set_bit(keycode, dev->keybit);
307                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
308                         clear_bit(old_keycode, dev->keybit);
309                 return 0;
310         }
311
312         return -EINVAL;
313 }
314
315 static void hp_wmi_notify(u32 value, void *context)
316 {
317         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
318         static struct key_entry *key;
319         union acpi_object *obj;
320
321         wmi_get_event_data(value, &response);
322
323         obj = (union acpi_object *)response.pointer;
324
325         if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
326                 int eventcode = *((u8 *) obj->buffer.pointer);
327                 if (eventcode == 0x4)
328                         eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
329                                                          0);
330                 key = hp_wmi_get_entry_by_scancode(eventcode);
331                 if (key) {
332                         switch (key->type) {
333                         case KE_KEY:
334                                 input_report_key(hp_wmi_input_dev,
335                                                  key->keycode, 1);
336                                 input_sync(hp_wmi_input_dev);
337                                 input_report_key(hp_wmi_input_dev,
338                                                  key->keycode, 0);
339                                 input_sync(hp_wmi_input_dev);
340                                 break;
341                         case KE_SW:
342                                 input_report_switch(hp_wmi_input_dev,
343                                                     key->keycode,
344                                                     hp_wmi_dock_state());
345                                 input_sync(hp_wmi_input_dev);
346                                 break;
347                         }
348                 } else if (eventcode == 0x5) {
349                         if (wifi_rfkill)
350                                 rfkill_force_state(wifi_rfkill,
351                                                    hp_wmi_wifi_state());
352                         if (bluetooth_rfkill)
353                                 rfkill_force_state(bluetooth_rfkill,
354                                                    hp_wmi_bluetooth_state());
355                         if (wwan_rfkill)
356                                 rfkill_force_state(wwan_rfkill,
357                                                    hp_wmi_wwan_state());
358                 } else
359                         printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
360                                eventcode);
361         } else
362                 printk(KERN_INFO "HP WMI: Unknown response received\n");
363 }
364
365 static int __init hp_wmi_input_setup(void)
366 {
367         struct key_entry *key;
368         int err;
369
370         hp_wmi_input_dev = input_allocate_device();
371
372         hp_wmi_input_dev->name = "HP WMI hotkeys";
373         hp_wmi_input_dev->phys = "wmi/input0";
374         hp_wmi_input_dev->id.bustype = BUS_HOST;
375         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
376         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
377
378         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
379                 switch (key->type) {
380                 case KE_KEY:
381                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
382                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
383                         break;
384                 case KE_SW:
385                         set_bit(EV_SW, hp_wmi_input_dev->evbit);
386                         set_bit(key->keycode, hp_wmi_input_dev->swbit);
387
388                         /* Set initial dock state */
389                         input_report_switch(hp_wmi_input_dev, key->keycode,
390                                             hp_wmi_dock_state());
391                         input_sync(hp_wmi_input_dev);
392                         break;
393                 }
394         }
395
396         err = input_register_device(hp_wmi_input_dev);
397
398         if (err) {
399                 input_free_device(hp_wmi_input_dev);
400                 return err;
401         }
402
403         return 0;
404 }
405
406 static void cleanup_sysfs(struct platform_device *device)
407 {
408         device_remove_file(&device->dev, &dev_attr_display);
409         device_remove_file(&device->dev, &dev_attr_hddtemp);
410         device_remove_file(&device->dev, &dev_attr_als);
411         device_remove_file(&device->dev, &dev_attr_dock);
412 }
413
414 static int __init hp_wmi_bios_setup(struct platform_device *device)
415 {
416         int err;
417         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
418
419         err = device_create_file(&device->dev, &dev_attr_display);
420         if (err)
421                 goto add_sysfs_error;
422         err = device_create_file(&device->dev, &dev_attr_hddtemp);
423         if (err)
424                 goto add_sysfs_error;
425         err = device_create_file(&device->dev, &dev_attr_als);
426         if (err)
427                 goto add_sysfs_error;
428         err = device_create_file(&device->dev, &dev_attr_dock);
429         if (err)
430                 goto add_sysfs_error;
431
432         if (wireless & 0x1) {
433                 wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
434                 wifi_rfkill->name = "hp-wifi";
435                 wifi_rfkill->state = hp_wmi_wifi_state();
436                 wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
437                 wifi_rfkill->user_claim_unsupported = 1;
438                 err = rfkill_register(wifi_rfkill);
439                 if (err)
440                         goto add_sysfs_error;
441         }
442
443         if (wireless & 0x2) {
444                 bluetooth_rfkill = rfkill_allocate(&device->dev,
445                                                    RFKILL_TYPE_BLUETOOTH);
446                 bluetooth_rfkill->name = "hp-bluetooth";
447                 bluetooth_rfkill->state = hp_wmi_bluetooth_state();
448                 bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
449                 bluetooth_rfkill->user_claim_unsupported = 1;
450                 err = rfkill_register(bluetooth_rfkill);
451                 if (err)
452                         goto register_bluetooth_error;
453         }
454
455         if (wireless & 0x4) {
456                 wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
457                 wwan_rfkill->name = "hp-wwan";
458                 wwan_rfkill->state = hp_wmi_wwan_state();
459                 wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
460                 wwan_rfkill->user_claim_unsupported = 1;
461                 err = rfkill_register(wwan_rfkill);
462                 if (err)
463                         goto register_wwan_err;
464         }
465
466         return 0;
467 register_wwan_err:
468         if (bluetooth_rfkill)
469                 rfkill_unregister(bluetooth_rfkill);
470 register_bluetooth_error:
471         if (wifi_rfkill)
472                 rfkill_unregister(wifi_rfkill);
473 add_sysfs_error:
474         cleanup_sysfs(device);
475         return err;
476 }
477
478 static int __exit hp_wmi_bios_remove(struct platform_device *device)
479 {
480         cleanup_sysfs(device);
481
482         if (wifi_rfkill)
483                 rfkill_unregister(wifi_rfkill);
484         if (bluetooth_rfkill)
485                 rfkill_unregister(bluetooth_rfkill);
486         if (wwan_rfkill)
487                 rfkill_unregister(wwan_rfkill);
488
489         return 0;
490 }
491
492 static int hp_wmi_resume_handler(struct platform_device *device)
493 {
494         struct key_entry *key;
495
496         /*
497          * Docking state may have changed while suspended, so trigger
498          * an input event for the current state. As this is a switch,
499          * the input layer will only actually pass it on if the state
500          * changed.
501          */
502         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
503                 switch (key->type) {
504                 case KE_SW:
505                         input_report_switch(hp_wmi_input_dev, key->keycode,
506                                             hp_wmi_dock_state());
507                         input_sync(hp_wmi_input_dev);
508                         break;
509                 }
510         }
511
512         return 0;
513 }
514
515 static int __init hp_wmi_init(void)
516 {
517         int err;
518
519         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
520                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
521                                                  hp_wmi_notify, NULL);
522                 if (!err)
523                         hp_wmi_input_setup();
524         }
525
526         if (wmi_has_guid(HPWMI_BIOS_GUID)) {
527                 err = platform_driver_register(&hp_wmi_driver);
528                 if (err)
529                         return 0;
530                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
531                 if (!hp_wmi_platform_dev) {
532                         platform_driver_unregister(&hp_wmi_driver);
533                         return 0;
534                 }
535                 platform_device_add(hp_wmi_platform_dev);
536         }
537
538         return 0;
539 }
540
541 static void __exit hp_wmi_exit(void)
542 {
543         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
544                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
545                 input_unregister_device(hp_wmi_input_dev);
546         }
547         if (hp_wmi_platform_dev) {
548                 platform_device_del(hp_wmi_platform_dev);
549                 platform_driver_unregister(&hp_wmi_driver);
550         }
551 }
552
553 module_init(hp_wmi_init);
554 module_exit(hp_wmi_exit);