Merge git://git.linux-nfs.org/projects/trondmy/nfs-2.6
[linux-2.6] / drivers / misc / 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
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
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
135 static int hp_wmi_display_state(void)
136 {
137         return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
138 }
139
140 static int hp_wmi_hddtemp_state(void)
141 {
142         return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
143 }
144
145 static int hp_wmi_als_state(void)
146 {
147         return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
148 }
149
150 static int hp_wmi_dock_state(void)
151 {
152         return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0);
153 }
154
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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                         break;
386                 }
387         }
388
389         err = input_register_device(hp_wmi_input_dev);
390
391         if (err) {
392                 input_free_device(hp_wmi_input_dev);
393                 return err;
394         }
395
396         return 0;
397 }
398
399 static void cleanup_sysfs(struct platform_device *device)
400 {
401         device_remove_file(&device->dev, &dev_attr_display);
402         device_remove_file(&device->dev, &dev_attr_hddtemp);
403         device_remove_file(&device->dev, &dev_attr_als);
404         device_remove_file(&device->dev, &dev_attr_dock);
405 }
406
407 static int __init hp_wmi_bios_setup(struct platform_device *device)
408 {
409         int err;
410         int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
411
412         err = device_create_file(&device->dev, &dev_attr_display);
413         if (err)
414                 goto add_sysfs_error;
415         err = device_create_file(&device->dev, &dev_attr_hddtemp);
416         if (err)
417                 goto add_sysfs_error;
418         err = device_create_file(&device->dev, &dev_attr_als);
419         if (err)
420                 goto add_sysfs_error;
421         err = device_create_file(&device->dev, &dev_attr_dock);
422         if (err)
423                 goto add_sysfs_error;
424
425         if (wireless & 0x1) {
426                 wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
427                 wifi_rfkill->name = "hp-wifi";
428                 wifi_rfkill->state = hp_wmi_wifi_state();
429                 wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
430                 wifi_rfkill->user_claim_unsupported = 1;
431                 rfkill_register(wifi_rfkill);
432         }
433
434         if (wireless & 0x2) {
435                 bluetooth_rfkill = rfkill_allocate(&device->dev,
436                                                    RFKILL_TYPE_BLUETOOTH);
437                 bluetooth_rfkill->name = "hp-bluetooth";
438                 bluetooth_rfkill->state = hp_wmi_bluetooth_state();
439                 bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
440                 bluetooth_rfkill->user_claim_unsupported = 1;
441                 rfkill_register(bluetooth_rfkill);
442         }
443
444         if (wireless & 0x4) {
445                 wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
446                 wwan_rfkill->name = "hp-wwan";
447                 wwan_rfkill->state = hp_wmi_wwan_state();
448                 wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
449                 wwan_rfkill->user_claim_unsupported = 1;
450                 rfkill_register(wwan_rfkill);
451         }
452
453         return 0;
454 add_sysfs_error:
455         cleanup_sysfs(device);
456         return err;
457 }
458
459 static int __exit hp_wmi_bios_remove(struct platform_device *device)
460 {
461         cleanup_sysfs(device);
462
463         if (wifi_rfkill)
464                 rfkill_unregister(wifi_rfkill);
465         if (bluetooth_rfkill)
466                 rfkill_unregister(bluetooth_rfkill);
467         if (wwan_rfkill)
468                 rfkill_unregister(wwan_rfkill);
469
470         return 0;
471 }
472
473 static int __init hp_wmi_init(void)
474 {
475         int err;
476
477         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
478                 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
479                                                  hp_wmi_notify, NULL);
480                 if (!err)
481                         hp_wmi_input_setup();
482         }
483
484         if (wmi_has_guid(HPWMI_BIOS_GUID)) {
485                 err = platform_driver_register(&hp_wmi_driver);
486                 if (err)
487                         return 0;
488                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
489                 if (!hp_wmi_platform_dev) {
490                         platform_driver_unregister(&hp_wmi_driver);
491                         return 0;
492                 }
493                 platform_device_add(hp_wmi_platform_dev);
494         }
495
496         return 0;
497 }
498
499 static void __exit hp_wmi_exit(void)
500 {
501         if (wmi_has_guid(HPWMI_EVENT_GUID)) {
502                 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
503                 input_unregister_device(hp_wmi_input_dev);
504         }
505         if (hp_wmi_platform_dev) {
506                 platform_device_del(hp_wmi_platform_dev);
507                 platform_driver_unregister(&hp_wmi_driver);
508         }
509 }
510
511 module_init(hp_wmi_init);
512 module_exit(hp_wmi_exit);