Merge branch 'hp-wmi' into release
[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_HARDWARE_QUERY 0x4
51 #define HPWMI_WIRELESS_QUERY 0x5
52 #define HPWMI_HOTKEY_QUERY 0xc
53
54 enum hp_wmi_radio {
55         HPWMI_WIFI = 0,
56         HPWMI_BLUETOOTH = 1,
57         HPWMI_WWAN = 2,
58 };
59
60 static int __init hp_wmi_bios_setup(struct platform_device *device);
61 static int __exit hp_wmi_bios_remove(struct platform_device *device);
62 static int hp_wmi_resume_handler(struct device *device);
63
64 struct bios_args {
65         u32 signature;
66         u32 command;
67         u32 commandtype;
68         u32 datasize;
69         u32 data;
70 };
71
72 struct bios_return {
73         u32 sigpass;
74         u32 return_code;
75         u32 value;
76 };
77
78 struct key_entry {
79         char type;              /* See KE_* below */
80         u16 code;
81         u16 keycode;
82 };
83
84 enum { KE_KEY, KE_END };
85
86 static struct key_entry hp_wmi_keymap[] = {
87         {KE_KEY, 0x02, KEY_BRIGHTNESSUP},
88         {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
89         {KE_KEY, 0x20e6, KEY_PROG1},
90         {KE_KEY, 0x2142, KEY_MEDIA},
91         {KE_KEY, 0x213b, KEY_INFO},
92         {KE_KEY, 0x231b, KEY_HELP},
93         {KE_END, 0}
94 };
95
96 static struct input_dev *hp_wmi_input_dev;
97 static struct platform_device *hp_wmi_platform_dev;
98
99 static struct rfkill *wifi_rfkill;
100 static struct rfkill *bluetooth_rfkill;
101 static struct rfkill *wwan_rfkill;
102
103 static const struct dev_pm_ops hp_wmi_pm_ops = {
104         .resume  = hp_wmi_resume_handler,
105         .restore  = hp_wmi_resume_handler,
106 };
107
108 static struct platform_driver hp_wmi_driver = {
109         .driver = {
110                 .name = "hp-wmi",
111                 .owner = THIS_MODULE,
112                 .pm = &hp_wmi_pm_ops,
113         },
114         .probe = hp_wmi_bios_setup,
115         .remove = hp_wmi_bios_remove,
116 };
117
118 static int hp_wmi_perform_query(int query, int write, int value)
119 {
120         struct bios_return bios_return;
121         acpi_status status;
122         union acpi_object *obj;
123         struct bios_args args = {
124                 .signature = 0x55434553,
125                 .command = write ? 0x2 : 0x1,
126                 .commandtype = query,
127                 .datasize = write ? 0x4 : 0,
128                 .data = value,
129         };
130         struct acpi_buffer input = { sizeof(struct bios_args), &args };
131         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
132
133         status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
134
135         obj = output.pointer;
136
137         if (!obj || obj->type != ACPI_TYPE_BUFFER)
138                 return -EINVAL;
139
140         bios_return = *((struct bios_return *)obj->buffer.pointer);
141         if (bios_return.return_code > 0)
142                 return bios_return.return_code * -1;
143         else
144                 return bios_return.value;
145 }
146
147 static int hp_wmi_display_state(void)
148 {
149         return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
150 }
151
152 static int hp_wmi_hddtemp_state(void)
153 {
154         return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
155 }
156
157 static int hp_wmi_als_state(void)
158 {
159         return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
160 }
161
162 static int hp_wmi_dock_state(void)
163 {
164         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
165
166         if (ret < 0)
167                 return ret;
168
169         return ret & 0x1;
170 }
171
172 static int hp_wmi_tablet_state(void)
173 {
174         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
175
176         if (ret < 0)
177                 return ret;
178
179         return (ret & 0x4) ? 1 : 0;
180 }
181
182 static int hp_wmi_set_block(void *data, bool blocked)
183 {
184         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
185         int query = BIT(r + 8) | ((!blocked) << r);
186
187         return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
188 }
189
190 static const struct rfkill_ops hp_wmi_rfkill_ops = {
191         .set_block = hp_wmi_set_block,
192 };
193
194 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
195 {
196         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
197         int mask = 0x200 << (r * 8);
198
199         if (wireless & mask)
200                 return false;
201         else
202                 return true;
203 }
204
205 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
206 {
207         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
208         int mask = 0x800 << (r * 8);
209
210         if (wireless & mask)
211                 return false;
212         else
213                 return true;
214 }
215
216 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
217                             char *buf)
218 {
219         int value = hp_wmi_display_state();
220         if (value < 0)
221                 return -EINVAL;
222         return sprintf(buf, "%d\n", value);
223 }
224
225 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
226                             char *buf)
227 {
228         int value = hp_wmi_hddtemp_state();
229         if (value < 0)
230                 return -EINVAL;
231         return sprintf(buf, "%d\n", value);
232 }
233
234 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
235                         char *buf)
236 {
237         int value = hp_wmi_als_state();
238         if (value < 0)
239                 return -EINVAL;
240         return sprintf(buf, "%d\n", value);
241 }
242
243 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
244                          char *buf)
245 {
246         int value = hp_wmi_dock_state();
247         if (value < 0)
248                 return -EINVAL;
249         return sprintf(buf, "%d\n", value);
250 }
251
252 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
253                          char *buf)
254 {
255         int value = hp_wmi_tablet_state();
256         if (value < 0)
257                 return -EINVAL;
258         return sprintf(buf, "%d\n", value);
259 }
260
261 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
262                        const char *buf, size_t count)
263 {
264         u32 tmp = simple_strtoul(buf, NULL, 10);
265         hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
266         return count;
267 }
268
269 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
270 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
271 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
272 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
273 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
274
275 static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
276 {
277         struct key_entry *key;
278
279         for (key = hp_wmi_keymap; key->type != KE_END; key++)
280                 if (code == key->code)
281                         return key;
282
283         return NULL;
284 }
285
286 static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
287 {
288         struct key_entry *key;
289
290         for (key = hp_wmi_keymap; key->type != KE_END; key++)
291                 if (key->type == KE_KEY && keycode == key->keycode)
292                         return key;
293
294         return NULL;
295 }
296
297 static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
298 {
299         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
300
301         if (key && key->type == KE_KEY) {
302                 *keycode = key->keycode;
303                 return 0;
304         }
305
306         return -EINVAL;
307 }
308
309 static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
310 {
311         struct key_entry *key;
312         int old_keycode;
313
314         if (keycode < 0 || keycode > KEY_MAX)
315                 return -EINVAL;
316
317         key = hp_wmi_get_entry_by_scancode(scancode);
318         if (key && key->type == KE_KEY) {
319                 old_keycode = key->keycode;
320                 key->keycode = keycode;
321                 set_bit(keycode, dev->keybit);
322                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
323                         clear_bit(old_keycode, dev->keybit);
324                 return 0;
325         }
326
327         return -EINVAL;
328 }
329
330 static void hp_wmi_notify(u32 value, void *context)
331 {
332         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
333         static struct key_entry *key;
334         union acpi_object *obj;
335         int eventcode;
336
337         wmi_get_event_data(value, &response);
338
339         obj = (union acpi_object *)response.pointer;
340
341         if (!obj || obj->type != ACPI_TYPE_BUFFER || obj->buffer.length != 8) {
342                 printk(KERN_INFO "HP WMI: Unknown response received\n");
343                 return;
344         }
345
346         eventcode = *((u8 *) obj->buffer.pointer);
347         if (eventcode == 0x4)
348                 eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
349                                                 0);
350         key = hp_wmi_get_entry_by_scancode(eventcode);
351         if (key) {
352                 switch (key->type) {
353                 case KE_KEY:
354                         input_report_key(hp_wmi_input_dev,
355                                          key->keycode, 1);
356                         input_sync(hp_wmi_input_dev);
357                         input_report_key(hp_wmi_input_dev,
358                                          key->keycode, 0);
359                         input_sync(hp_wmi_input_dev);
360                         break;
361                 }
362         } else if (eventcode == 0x1) {
363                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
364                                     hp_wmi_dock_state());
365                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
366                                     hp_wmi_tablet_state());
367                 input_sync(hp_wmi_input_dev);
368         } else if (eventcode == 0x5) {
369                 if (wifi_rfkill)
370                         rfkill_set_states(wifi_rfkill,
371                                           hp_wmi_get_sw_state(HPWMI_WIFI),
372                                           hp_wmi_get_hw_state(HPWMI_WIFI));
373                 if (bluetooth_rfkill)
374                         rfkill_set_states(bluetooth_rfkill,
375                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
376                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
377                 if (wwan_rfkill)
378                         rfkill_set_states(wwan_rfkill,
379                                           hp_wmi_get_sw_state(HPWMI_WWAN),
380                                           hp_wmi_get_hw_state(HPWMI_WWAN));
381         } else
382                 printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
383                         eventcode);
384 }
385
386 static int __init hp_wmi_input_setup(void)
387 {
388         struct key_entry *key;
389         int err;
390
391         hp_wmi_input_dev = input_allocate_device();
392
393         hp_wmi_input_dev->name = "HP WMI hotkeys";
394         hp_wmi_input_dev->phys = "wmi/input0";
395         hp_wmi_input_dev->id.bustype = BUS_HOST;
396         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
397         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
398
399         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
400                 switch (key->type) {
401                 case KE_KEY:
402                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
403                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
404                         break;
405                 }
406         }
407
408         set_bit(EV_SW, hp_wmi_input_dev->evbit);
409         set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
410         set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
411
412         /* Set initial hardware state */
413         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
414         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
415                             hp_wmi_tablet_state());
416         input_sync(hp_wmi_input_dev);
417
418         err = input_register_device(hp_wmi_input_dev);
419
420         if (err) {
421                 input_free_device(hp_wmi_input_dev);
422                 return err;
423         }
424
425         return 0;
426 }
427
428 static void cleanup_sysfs(struct platform_device *device)
429 {
430         device_remove_file(&device->dev, &dev_attr_display);
431         device_remove_file(&device->dev, &dev_attr_hddtemp);
432         device_remove_file(&device->dev, &dev_attr_als);
433         device_remove_file(&device->dev, &dev_attr_dock);
434         device_remove_file(&device->dev, &dev_attr_tablet);
435 }
436
437 static int __init hp_wmi_bios_setup(struct platform_device *device)
438 {
439         int err;
440         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
441
442         err = device_create_file(&device->dev, &dev_attr_display);
443         if (err)
444                 goto add_sysfs_error;
445         err = device_create_file(&device->dev, &dev_attr_hddtemp);
446         if (err)
447                 goto add_sysfs_error;
448         err = device_create_file(&device->dev, &dev_attr_als);
449         if (err)
450                 goto add_sysfs_error;
451         err = device_create_file(&device->dev, &dev_attr_dock);
452         if (err)
453                 goto add_sysfs_error;
454         err = device_create_file(&device->dev, &dev_attr_tablet);
455         if (err)
456                 goto add_sysfs_error;
457
458         if (wireless & 0x1) {
459                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
460                                            RFKILL_TYPE_WLAN,
461                                            &hp_wmi_rfkill_ops,
462                                            (void *) HPWMI_WIFI);
463                 rfkill_init_sw_state(wifi_rfkill,
464                                      hp_wmi_get_sw_state(HPWMI_WIFI));
465                 rfkill_set_hw_state(wifi_rfkill,
466                                     hp_wmi_get_hw_state(HPWMI_WIFI));
467                 err = rfkill_register(wifi_rfkill);
468                 if (err)
469                         goto register_wifi_error;
470         }
471
472         if (wireless & 0x2) {
473                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
474                                                 RFKILL_TYPE_BLUETOOTH,
475                                                 &hp_wmi_rfkill_ops,
476                                                 (void *) HPWMI_BLUETOOTH);
477                 rfkill_init_sw_state(bluetooth_rfkill,
478                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
479                 rfkill_set_hw_state(bluetooth_rfkill,
480                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
481                 err = rfkill_register(bluetooth_rfkill);
482                 if (err)
483                         goto register_bluetooth_error;
484         }
485
486         if (wireless & 0x4) {
487                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
488                                            RFKILL_TYPE_WWAN,
489                                            &hp_wmi_rfkill_ops,
490                                            (void *) HPWMI_WWAN);
491                 rfkill_init_sw_state(wwan_rfkill,
492                                      hp_wmi_get_sw_state(HPWMI_WWAN));
493                 rfkill_set_hw_state(wwan_rfkill,
494                                     hp_wmi_get_hw_state(HPWMI_WWAN));
495                 err = rfkill_register(wwan_rfkill);
496                 if (err)
497                         goto register_wwan_err;
498         }
499
500         return 0;
501 register_wwan_err:
502         rfkill_destroy(wwan_rfkill);
503         if (bluetooth_rfkill)
504                 rfkill_unregister(bluetooth_rfkill);
505 register_bluetooth_error:
506         rfkill_destroy(bluetooth_rfkill);
507         if (wifi_rfkill)
508                 rfkill_unregister(wifi_rfkill);
509 register_wifi_error:
510         rfkill_destroy(wifi_rfkill);
511 add_sysfs_error:
512         cleanup_sysfs(device);
513         return err;
514 }
515
516 static int __exit hp_wmi_bios_remove(struct platform_device *device)
517 {
518         cleanup_sysfs(device);
519
520         if (wifi_rfkill) {
521                 rfkill_unregister(wifi_rfkill);
522                 rfkill_destroy(wifi_rfkill);
523         }
524         if (bluetooth_rfkill) {
525                 rfkill_unregister(bluetooth_rfkill);
526                 rfkill_destroy(bluetooth_rfkill);
527         }
528         if (wwan_rfkill) {
529                 rfkill_unregister(wwan_rfkill);
530                 rfkill_destroy(wwan_rfkill);
531         }
532
533         return 0;
534 }
535
536 static int hp_wmi_resume_handler(struct device *device)
537 {
538         /*
539          * Hardware state may have changed while suspended, so trigger
540          * input events for the current state. As this is a switch,
541          * the input layer will only actually pass it on if the state
542          * changed.
543          */
544         if (hp_wmi_input_dev) {
545                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
546                                     hp_wmi_dock_state());
547                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
548                                     hp_wmi_tablet_state());
549                 input_sync(hp_wmi_input_dev);
550         }
551
552         if (wifi_rfkill)
553                 rfkill_set_states(wifi_rfkill,
554                                   hp_wmi_get_sw_state(HPWMI_WIFI),
555                                   hp_wmi_get_hw_state(HPWMI_WIFI));
556         if (bluetooth_rfkill)
557                 rfkill_set_states(bluetooth_rfkill,
558                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
559                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
560         if (wwan_rfkill)
561                 rfkill_set_states(wwan_rfkill,
562                                   hp_wmi_get_sw_state(HPWMI_WWAN),
563                                   hp_wmi_get_hw_state(HPWMI_WWAN));
564
565         return 0;
566 }
567
568 static int __init hp_wmi_init(void)
569 {
570         int err;
571
572         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
573                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
574                                                  hp_wmi_notify, NULL);
575                 if (!err)
576                         hp_wmi_input_setup();
577         }
578
579         if (wmi_has_guid(HPWMI_BIOS_GUID)) {
580                 err = platform_driver_register(&hp_wmi_driver);
581                 if (err)
582                         return 0;
583                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
584                 if (!hp_wmi_platform_dev) {
585                         platform_driver_unregister(&hp_wmi_driver);
586                         return 0;
587                 }
588                 platform_device_add(hp_wmi_platform_dev);
589         }
590
591         return 0;
592 }
593
594 static void __exit hp_wmi_exit(void)
595 {
596         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
597                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
598                 input_unregister_device(hp_wmi_input_dev);
599         }
600         if (hp_wmi_platform_dev) {
601                 platform_device_del(hp_wmi_platform_dev);
602                 platform_driver_unregister(&hp_wmi_driver);
603         }
604 }
605
606 module_init(hp_wmi_init);
607 module_exit(hp_wmi_exit);