hp-wmi: Add support for reporting tablet state
[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 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_END };
79
80 static struct key_entry hp_wmi_keymap[] = {
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         .resume = hp_wmi_resume_handler,
105 };
106
107 static int hp_wmi_perform_query(int query, int write, int value)
108 {
109         struct bios_return bios_return;
110         acpi_status status;
111         union acpi_object *obj;
112         struct bios_args args = {
113                 .signature = 0x55434553,
114                 .command = write ? 0x2 : 0x1,
115                 .commandtype = query,
116                 .datasize = write ? 0x4 : 0,
117                 .data = value,
118         };
119         struct acpi_buffer input = { sizeof(struct bios_args), &args };
120         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
121
122         status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
123
124         obj = output.pointer;
125
126         if (!obj || obj->type != ACPI_TYPE_BUFFER)
127                 return -EINVAL;
128
129         bios_return = *((struct bios_return *)obj->buffer.pointer);
130         if (bios_return.return_code > 0)
131                 return bios_return.return_code * -1;
132         else
133                 return bios_return.value;
134 }
135
136 static int hp_wmi_display_state(void)
137 {
138         return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
139 }
140
141 static int hp_wmi_hddtemp_state(void)
142 {
143         return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
144 }
145
146 static int hp_wmi_als_state(void)
147 {
148         return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
149 }
150
151 static int hp_wmi_dock_state(void)
152 {
153         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
154
155         if (ret < 0)
156                 return ret;
157
158         return ret & 0x1;
159 }
160
161 static int hp_wmi_tablet_state(void)
162 {
163         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
164
165         if (ret < 0)
166                 return ret;
167
168         return (ret & 0x4) ? 1 : 0;
169 }
170
171 static int hp_wmi_wifi_set(void *data, enum rfkill_state state)
172 {
173         if (state)
174                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101);
175         else
176                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100);
177 }
178
179 static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state)
180 {
181         if (state)
182                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202);
183         else
184                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200);
185 }
186
187 static int hp_wmi_wwan_set(void *data, enum rfkill_state state)
188 {
189         if (state)
190                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404);
191         else
192                 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400);
193 }
194
195 static int hp_wmi_wifi_state(void)
196 {
197         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
198
199         if (wireless & 0x100)
200                 return RFKILL_STATE_UNBLOCKED;
201         else
202                 return RFKILL_STATE_SOFT_BLOCKED;
203 }
204
205 static int hp_wmi_bluetooth_state(void)
206 {
207         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
208
209         if (wireless & 0x10000)
210                 return RFKILL_STATE_UNBLOCKED;
211         else
212                 return RFKILL_STATE_SOFT_BLOCKED;
213 }
214
215 static int hp_wmi_wwan_state(void)
216 {
217         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
218
219         if (wireless & 0x1000000)
220                 return RFKILL_STATE_UNBLOCKED;
221         else
222                 return RFKILL_STATE_SOFT_BLOCKED;
223 }
224
225 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
226                             char *buf)
227 {
228         int value = hp_wmi_display_state();
229         if (value < 0)
230                 return -EINVAL;
231         return sprintf(buf, "%d\n", value);
232 }
233
234 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
235                             char *buf)
236 {
237         int value = hp_wmi_hddtemp_state();
238         if (value < 0)
239                 return -EINVAL;
240         return sprintf(buf, "%d\n", value);
241 }
242
243 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
244                         char *buf)
245 {
246         int value = hp_wmi_als_state();
247         if (value < 0)
248                 return -EINVAL;
249         return sprintf(buf, "%d\n", value);
250 }
251
252 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
253                          char *buf)
254 {
255         int value = hp_wmi_dock_state();
256         if (value < 0)
257                 return -EINVAL;
258         return sprintf(buf, "%d\n", value);
259 }
260
261 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
262                          char *buf)
263 {
264         int value = hp_wmi_tablet_state();
265         if (value < 0)
266                 return -EINVAL;
267         return sprintf(buf, "%d\n", value);
268 }
269
270 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
271                        const char *buf, size_t count)
272 {
273         u32 tmp = simple_strtoul(buf, NULL, 10);
274         hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
275         return count;
276 }
277
278 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
279 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
280 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
281 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
282 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
283
284 static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
285 {
286         struct key_entry *key;
287
288         for (key = hp_wmi_keymap; key->type != KE_END; key++)
289                 if (code == key->code)
290                         return key;
291
292         return NULL;
293 }
294
295 static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
296 {
297         struct key_entry *key;
298
299         for (key = hp_wmi_keymap; key->type != KE_END; key++)
300                 if (key->type == KE_KEY && keycode == key->keycode)
301                         return key;
302
303         return NULL;
304 }
305
306 static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
307 {
308         struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
309
310         if (key && key->type == KE_KEY) {
311                 *keycode = key->keycode;
312                 return 0;
313         }
314
315         return -EINVAL;
316 }
317
318 static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
319 {
320         struct key_entry *key;
321         int old_keycode;
322
323         if (keycode < 0 || keycode > KEY_MAX)
324                 return -EINVAL;
325
326         key = hp_wmi_get_entry_by_scancode(scancode);
327         if (key && key->type == KE_KEY) {
328                 old_keycode = key->keycode;
329                 key->keycode = keycode;
330                 set_bit(keycode, dev->keybit);
331                 if (!hp_wmi_get_entry_by_keycode(old_keycode))
332                         clear_bit(old_keycode, dev->keybit);
333                 return 0;
334         }
335
336         return -EINVAL;
337 }
338
339 static void hp_wmi_notify(u32 value, void *context)
340 {
341         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
342         static struct key_entry *key;
343         union acpi_object *obj;
344
345         wmi_get_event_data(value, &response);
346
347         obj = (union acpi_object *)response.pointer;
348
349         if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
350                 int eventcode = *((u8 *) obj->buffer.pointer);
351                 if (eventcode == 0x4)
352                         eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
353                                                          0);
354                 key = hp_wmi_get_entry_by_scancode(eventcode);
355                 if (key) {
356                         switch (key->type) {
357                         case KE_KEY:
358                                 input_report_key(hp_wmi_input_dev,
359                                                  key->keycode, 1);
360                                 input_sync(hp_wmi_input_dev);
361                                 input_report_key(hp_wmi_input_dev,
362                                                  key->keycode, 0);
363                                 input_sync(hp_wmi_input_dev);
364                                 break;
365                         }
366                 } else if (eventcode == 0x1) {
367                         input_report_switch(hp_wmi_input_dev, SW_DOCK,
368                                             hp_wmi_dock_state());
369                         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
370                                             hp_wmi_tablet_state());
371                         input_sync(hp_wmi_input_dev);
372                 } else if (eventcode == 0x5) {
373                         if (wifi_rfkill)
374                                 rfkill_force_state(wifi_rfkill,
375                                                    hp_wmi_wifi_state());
376                         if (bluetooth_rfkill)
377                                 rfkill_force_state(bluetooth_rfkill,
378                                                    hp_wmi_bluetooth_state());
379                         if (wwan_rfkill)
380                                 rfkill_force_state(wwan_rfkill,
381                                                    hp_wmi_wwan_state());
382                 } else
383                         printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
384                                eventcode);
385         } else
386                 printk(KERN_INFO "HP WMI: Unknown response received\n");
387 }
388
389 static int __init hp_wmi_input_setup(void)
390 {
391         struct key_entry *key;
392         int err;
393
394         hp_wmi_input_dev = input_allocate_device();
395
396         hp_wmi_input_dev->name = "HP WMI hotkeys";
397         hp_wmi_input_dev->phys = "wmi/input0";
398         hp_wmi_input_dev->id.bustype = BUS_HOST;
399         hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
400         hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
401
402         for (key = hp_wmi_keymap; key->type != KE_END; key++) {
403                 switch (key->type) {
404                 case KE_KEY:
405                         set_bit(EV_KEY, hp_wmi_input_dev->evbit);
406                         set_bit(key->keycode, hp_wmi_input_dev->keybit);
407                         break;
408                 }
409         }
410
411         set_bit(EV_SW, hp_wmi_input_dev->evbit);
412         set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
413         set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
414
415         /* Set initial hardware state */
416         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
417         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
418                             hp_wmi_tablet_state());
419         input_sync(hp_wmi_input_dev);
420
421         err = input_register_device(hp_wmi_input_dev);
422
423         if (err) {
424                 input_free_device(hp_wmi_input_dev);
425                 return err;
426         }
427
428         return 0;
429 }
430
431 static void cleanup_sysfs(struct platform_device *device)
432 {
433         device_remove_file(&device->dev, &dev_attr_display);
434         device_remove_file(&device->dev, &dev_attr_hddtemp);
435         device_remove_file(&device->dev, &dev_attr_als);
436         device_remove_file(&device->dev, &dev_attr_dock);
437         device_remove_file(&device->dev, &dev_attr_tablet);
438 }
439
440 static int __init hp_wmi_bios_setup(struct platform_device *device)
441 {
442         int err;
443         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
444
445         err = device_create_file(&device->dev, &dev_attr_display);
446         if (err)
447                 goto add_sysfs_error;
448         err = device_create_file(&device->dev, &dev_attr_hddtemp);
449         if (err)
450                 goto add_sysfs_error;
451         err = device_create_file(&device->dev, &dev_attr_als);
452         if (err)
453                 goto add_sysfs_error;
454         err = device_create_file(&device->dev, &dev_attr_dock);
455         if (err)
456                 goto add_sysfs_error;
457         err = device_create_file(&device->dev, &dev_attr_tablet);
458         if (err)
459                 goto add_sysfs_error;
460
461         if (wireless & 0x1) {
462                 wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
463                 wifi_rfkill->name = "hp-wifi";
464                 wifi_rfkill->state = hp_wmi_wifi_state();
465                 wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
466                 wifi_rfkill->user_claim_unsupported = 1;
467                 err = rfkill_register(wifi_rfkill);
468                 if (err)
469                         goto add_sysfs_error;
470         }
471
472         if (wireless & 0x2) {
473                 bluetooth_rfkill = rfkill_allocate(&device->dev,
474                                                    RFKILL_TYPE_BLUETOOTH);
475                 bluetooth_rfkill->name = "hp-bluetooth";
476                 bluetooth_rfkill->state = hp_wmi_bluetooth_state();
477                 bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
478                 bluetooth_rfkill->user_claim_unsupported = 1;
479                 err = rfkill_register(bluetooth_rfkill);
480                 if (err)
481                         goto register_bluetooth_error;
482         }
483
484         if (wireless & 0x4) {
485                 wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
486                 wwan_rfkill->name = "hp-wwan";
487                 wwan_rfkill->state = hp_wmi_wwan_state();
488                 wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
489                 wwan_rfkill->user_claim_unsupported = 1;
490                 err = rfkill_register(wwan_rfkill);
491                 if (err)
492                         goto register_wwan_err;
493         }
494
495         return 0;
496 register_wwan_err:
497         if (bluetooth_rfkill)
498                 rfkill_unregister(bluetooth_rfkill);
499 register_bluetooth_error:
500         if (wifi_rfkill)
501                 rfkill_unregister(wifi_rfkill);
502 add_sysfs_error:
503         cleanup_sysfs(device);
504         return err;
505 }
506
507 static int __exit hp_wmi_bios_remove(struct platform_device *device)
508 {
509         cleanup_sysfs(device);
510
511         if (wifi_rfkill)
512                 rfkill_unregister(wifi_rfkill);
513         if (bluetooth_rfkill)
514                 rfkill_unregister(bluetooth_rfkill);
515         if (wwan_rfkill)
516                 rfkill_unregister(wwan_rfkill);
517
518         return 0;
519 }
520
521 static int hp_wmi_resume_handler(struct platform_device *device)
522 {
523         /*
524          * Hardware state may have changed while suspended, so trigger
525          * input events for the current state. As this is a switch,
526          * the input layer will only actually pass it on if the state
527          * changed.
528          */
529
530         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
531         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
532                             hp_wmi_tablet_state());
533         input_sync(hp_wmi_input_dev);
534
535         return 0;
536 }
537
538 static int __init hp_wmi_init(void)
539 {
540         int err;
541
542         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
543                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
544                                                  hp_wmi_notify, NULL);
545                 if (!err)
546                         hp_wmi_input_setup();
547         }
548
549         if (wmi_has_guid(HPWMI_BIOS_GUID)) {
550                 err = platform_driver_register(&hp_wmi_driver);
551                 if (err)
552                         return 0;
553                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
554                 if (!hp_wmi_platform_dev) {
555                         platform_driver_unregister(&hp_wmi_driver);
556                         return 0;
557                 }
558                 platform_device_add(hp_wmi_platform_dev);
559         }
560
561         return 0;
562 }
563
564 static void __exit hp_wmi_exit(void)
565 {
566         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
567                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
568                 input_unregister_device(hp_wmi_input_dev);
569         }
570         if (hp_wmi_platform_dev) {
571                 platform_device_del(hp_wmi_platform_dev);
572                 platform_driver_unregister(&hp_wmi_driver);
573         }
574 }
575
576 module_init(hp_wmi_init);
577 module_exit(hp_wmi_exit);