f94017bcdd6e9c8b10d80c70f7fd56ed27788d83
[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  * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
6  *
7  * Portions based on wistron_btns.c:
8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11  *
12  *  This program is free software; you can redistribute it and/or modify
13  *  it under the terms of the GNU General Public License as published by
14  *  the Free Software Foundation; either version 2 of the License, or
15  *  (at your option) any later version.
16  *
17  *  This program is distributed in the hope that it will be useful,
18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  *  GNU General Public License for more details.
21  *
22  *  You should have received a copy of the GNU General Public License
23  *  along with this program; if not, write to the Free Software
24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
25  */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/types.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/platform_device.h>
37 #include <linux/acpi.h>
38 #include <linux/rfkill.h>
39 #include <linux/string.h>
40
41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
43 MODULE_LICENSE("GPL");
44
45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
47
48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
50
51 #define HPWMI_DISPLAY_QUERY 0x1
52 #define HPWMI_HDDTEMP_QUERY 0x2
53 #define HPWMI_ALS_QUERY 0x3
54 #define HPWMI_HARDWARE_QUERY 0x4
55 #define HPWMI_WIRELESS_QUERY 0x5
56 #define HPWMI_HOTKEY_QUERY 0xc
57 #define HPWMI_WIRELESS2_QUERY 0x1b
58
59 enum hp_wmi_radio {
60         HPWMI_WIFI = 0,
61         HPWMI_BLUETOOTH = 1,
62         HPWMI_WWAN = 2,
63 };
64
65 enum hp_wmi_event_ids {
66         HPWMI_DOCK_EVENT = 1,
67         HPWMI_PARK_HDD = 2,
68         HPWMI_SMART_ADAPTER = 3,
69         HPWMI_BEZEL_BUTTON = 4,
70         HPWMI_WIRELESS = 5,
71         HPWMI_CPU_BATTERY_THROTTLE = 6,
72         HPWMI_LOCK_SWITCH = 7,
73 };
74
75 static int __devinit hp_wmi_bios_setup(struct platform_device *device);
76 static int __exit hp_wmi_bios_remove(struct platform_device *device);
77 static int hp_wmi_resume_handler(struct device *device);
78
79 struct bios_args {
80         u32 signature;
81         u32 command;
82         u32 commandtype;
83         u32 datasize;
84         u32 data;
85 };
86
87 struct bios_return {
88         u32 sigpass;
89         u32 return_code;
90 };
91
92 enum hp_return_value {
93         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
94         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
95         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
96         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
97 };
98
99 enum hp_wireless2_bits {
100         HPWMI_POWER_STATE       = 0x01,
101         HPWMI_POWER_SOFT        = 0x02,
102         HPWMI_POWER_BIOS        = 0x04,
103         HPWMI_POWER_HARD        = 0x08,
104 };
105
106 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
107                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
108 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
109
110 struct bios_rfkill2_device_state {
111         u8 radio_type;
112         u8 bus_type;
113         u16 vendor_id;
114         u16 product_id;
115         u16 subsys_vendor_id;
116         u16 subsys_product_id;
117         u8 rfkill_id;
118         u8 power;
119         u8 unknown[4];
120 };
121
122 /* 7 devices fit into the 128 byte buffer */
123 #define HPWMI_MAX_RFKILL2_DEVICES       7
124
125 struct bios_rfkill2_state {
126         u8 unknown[7];
127         u8 count;
128         u8 pad[8];
129         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
130 };
131
132 static const struct key_entry hp_wmi_keymap[] = {
133         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
134         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
135         { KE_KEY, 0x20e6, { KEY_PROG1 } },
136         { KE_KEY, 0x20e8, { KEY_MEDIA } },
137         { KE_KEY, 0x2142, { KEY_MEDIA } },
138         { KE_KEY, 0x213b, { KEY_INFO } },
139         { KE_KEY, 0x2169, { KEY_DIRECTION } },
140         { KE_KEY, 0x231b, { KEY_HELP } },
141         { KE_END, 0 }
142 };
143
144 static struct input_dev *hp_wmi_input_dev;
145 static struct platform_device *hp_wmi_platform_dev;
146
147 static struct rfkill *wifi_rfkill;
148 static struct rfkill *bluetooth_rfkill;
149 static struct rfkill *wwan_rfkill;
150
151 struct rfkill2_device {
152         u8 id;
153         int num;
154         struct rfkill *rfkill;
155 };
156
157 static int rfkill2_count;
158 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
159
160 static const struct dev_pm_ops hp_wmi_pm_ops = {
161         .resume  = hp_wmi_resume_handler,
162         .restore  = hp_wmi_resume_handler,
163 };
164
165 static struct platform_driver hp_wmi_driver = {
166         .driver = {
167                 .name = "hp-wmi",
168                 .owner = THIS_MODULE,
169                 .pm = &hp_wmi_pm_ops,
170         },
171         .probe = hp_wmi_bios_setup,
172         .remove = hp_wmi_bios_remove,
173 };
174
175 /*
176  * hp_wmi_perform_query
177  *
178  * query:       The commandtype -> What should be queried
179  * write:       The command -> 0 read, 1 write, 3 ODM specific
180  * buffer:      Buffer used as input and/or output
181  * insize:      Size of input buffer
182  * outsize:     Size of output buffer
183  *
184  * returns zero on success
185  *         an HP WMI query specific error code (which is positive)
186  *         -EINVAL if the query was not successful at all
187  *         -EINVAL if the output buffer size exceeds buffersize
188  *
189  * Note: The buffersize must at least be the maximum of the input and output
190  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
191  *       and 128 byte output. The caller would do:
192  *       buffer = kzalloc(128, GFP_KERNEL);
193  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
194  */
195 static int hp_wmi_perform_query(int query, int write, void *buffer,
196                                 int insize, int outsize)
197 {
198         struct bios_return *bios_return;
199         int actual_outsize;
200         union acpi_object *obj;
201         struct bios_args args = {
202                 .signature = 0x55434553,
203                 .command = write ? 0x2 : 0x1,
204                 .commandtype = query,
205                 .datasize = insize,
206                 .data = 0,
207         };
208         struct acpi_buffer input = { sizeof(struct bios_args), &args };
209         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
210
211         if (WARN_ON(insize > sizeof(args.data)))
212                 return -EINVAL;
213         memcpy(&args.data, buffer, insize);
214
215         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
216
217         obj = output.pointer;
218
219         if (!obj)
220                 return -EINVAL;
221         else if (obj->type != ACPI_TYPE_BUFFER) {
222                 kfree(obj);
223                 return -EINVAL;
224         }
225
226         bios_return = (struct bios_return *)obj->buffer.pointer;
227
228         if (bios_return->return_code) {
229                 if (bios_return->return_code != HPWMI_RET_UNKNOWN_CMDTYPE)
230                         pr_warn("query 0x%x returned error 0x%x\n",
231                                 query, bios_return->return_code);
232                 kfree(obj);
233                 return bios_return->return_code;
234         }
235
236         if (!outsize) {
237                 /* ignore output data */
238                 kfree(obj);
239                 return 0;
240         }
241
242         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
243         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
244         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
245         kfree(obj);
246         return 0;
247 }
248
249 static int hp_wmi_display_state(void)
250 {
251         int state = 0;
252         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
253                                        sizeof(state), sizeof(state));
254         if (ret)
255                 return -EINVAL;
256         return state;
257 }
258
259 static int hp_wmi_hddtemp_state(void)
260 {
261         int state = 0;
262         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
263                                        sizeof(state), sizeof(state));
264         if (ret)
265                 return -EINVAL;
266         return state;
267 }
268
269 static int hp_wmi_als_state(void)
270 {
271         int state = 0;
272         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
273                                        sizeof(state), sizeof(state));
274         if (ret)
275                 return -EINVAL;
276         return state;
277 }
278
279 static int hp_wmi_dock_state(void)
280 {
281         int state = 0;
282         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
283                                        sizeof(state), sizeof(state));
284
285         if (ret)
286                 return -EINVAL;
287
288         return state & 0x1;
289 }
290
291 static int hp_wmi_tablet_state(void)
292 {
293         int state = 0;
294         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
295                                        sizeof(state), sizeof(state));
296         if (ret)
297                 return ret;
298
299         return (state & 0x4) ? 1 : 0;
300 }
301
302 static int hp_wmi_set_block(void *data, bool blocked)
303 {
304         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
305         int query = BIT(r + 8) | ((!blocked) << r);
306         int ret;
307
308         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
309                                    &query, sizeof(query), 0);
310         if (ret)
311                 return -EINVAL;
312         return 0;
313 }
314
315 static const struct rfkill_ops hp_wmi_rfkill_ops = {
316         .set_block = hp_wmi_set_block,
317 };
318
319 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
320 {
321         int wireless = 0;
322         int mask;
323         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
324                              &wireless, sizeof(wireless),
325                              sizeof(wireless));
326         /* TBD: Pass error */
327
328         mask = 0x200 << (r * 8);
329
330         if (wireless & mask)
331                 return false;
332         else
333                 return true;
334 }
335
336 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
337 {
338         int wireless = 0;
339         int mask;
340         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
341                              &wireless, sizeof(wireless),
342                              sizeof(wireless));
343         /* TBD: Pass error */
344
345         mask = 0x800 << (r * 8);
346
347         if (wireless & mask)
348                 return false;
349         else
350                 return true;
351 }
352
353 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
354 {
355         int rfkill_id = (int)(long)data;
356         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
357
358         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
359                                    buffer, sizeof(buffer), 0))
360                 return -EINVAL;
361         return 0;
362 }
363
364 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
365         .set_block = hp_wmi_rfkill2_set_block,
366 };
367
368 static int hp_wmi_rfkill2_refresh(void)
369 {
370         int err, i;
371         struct bios_rfkill2_state state;
372
373         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
374                                    0, sizeof(state));
375         if (err)
376                 return err;
377
378         for (i = 0; i < rfkill2_count; i++) {
379                 int num = rfkill2[i].num;
380                 struct bios_rfkill2_device_state *devstate;
381                 devstate = &state.device[num];
382
383                 if (num >= state.count ||
384                     devstate->rfkill_id != rfkill2[i].id) {
385                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
386                         continue;
387                 }
388
389                 rfkill_set_states(rfkill2[i].rfkill,
390                                   IS_SWBLOCKED(devstate->power),
391                                   IS_HWBLOCKED(devstate->power));
392         }
393
394         return 0;
395 }
396
397 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
398                             char *buf)
399 {
400         int value = hp_wmi_display_state();
401         if (value < 0)
402                 return -EINVAL;
403         return sprintf(buf, "%d\n", value);
404 }
405
406 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
407                             char *buf)
408 {
409         int value = hp_wmi_hddtemp_state();
410         if (value < 0)
411                 return -EINVAL;
412         return sprintf(buf, "%d\n", value);
413 }
414
415 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
416                         char *buf)
417 {
418         int value = hp_wmi_als_state();
419         if (value < 0)
420                 return -EINVAL;
421         return sprintf(buf, "%d\n", value);
422 }
423
424 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
425                          char *buf)
426 {
427         int value = hp_wmi_dock_state();
428         if (value < 0)
429                 return -EINVAL;
430         return sprintf(buf, "%d\n", value);
431 }
432
433 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
434                          char *buf)
435 {
436         int value = hp_wmi_tablet_state();
437         if (value < 0)
438                 return -EINVAL;
439         return sprintf(buf, "%d\n", value);
440 }
441
442 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
443                        const char *buf, size_t count)
444 {
445         u32 tmp = simple_strtoul(buf, NULL, 10);
446         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
447                                        sizeof(tmp), sizeof(tmp));
448         if (ret)
449                 return -EINVAL;
450
451         return count;
452 }
453
454 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
455 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
456 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
457 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
458 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
459
460 static void hp_wmi_notify(u32 value, void *context)
461 {
462         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
463         union acpi_object *obj;
464         u32 event_id, event_data;
465         int key_code = 0, ret;
466         u32 *location;
467         acpi_status status;
468
469         status = wmi_get_event_data(value, &response);
470         if (status != AE_OK) {
471                 pr_info("bad event status 0x%x\n", status);
472                 return;
473         }
474
475         obj = (union acpi_object *)response.pointer;
476
477         if (!obj)
478                 return;
479         if (obj->type != ACPI_TYPE_BUFFER) {
480                 pr_info("Unknown response received %d\n", obj->type);
481                 kfree(obj);
482                 return;
483         }
484
485         /*
486          * Depending on ACPI version the concatenation of id and event data
487          * inside _WED function will result in a 8 or 16 byte buffer.
488          */
489         location = (u32 *)obj->buffer.pointer;
490         if (obj->buffer.length == 8) {
491                 event_id = *location;
492                 event_data = *(location + 1);
493         } else if (obj->buffer.length == 16) {
494                 event_id = *location;
495                 event_data = *(location + 2);
496         } else {
497                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
498                 kfree(obj);
499                 return;
500         }
501         kfree(obj);
502
503         switch (event_id) {
504         case HPWMI_DOCK_EVENT:
505                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
506                                     hp_wmi_dock_state());
507                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
508                                     hp_wmi_tablet_state());
509                 input_sync(hp_wmi_input_dev);
510                 break;
511         case HPWMI_PARK_HDD:
512                 break;
513         case HPWMI_SMART_ADAPTER:
514                 break;
515         case HPWMI_BEZEL_BUTTON:
516                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
517                                            &key_code,
518                                            sizeof(key_code),
519                                            sizeof(key_code));
520                 if (ret)
521                         break;
522
523                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
524                                                 key_code, 1, true))
525                         pr_info("Unknown key code - 0x%x\n", key_code);
526                 break;
527         case HPWMI_WIRELESS:
528                 if (rfkill2_count) {
529                         hp_wmi_rfkill2_refresh();
530                         break;
531                 }
532
533                 if (wifi_rfkill)
534                         rfkill_set_states(wifi_rfkill,
535                                           hp_wmi_get_sw_state(HPWMI_WIFI),
536                                           hp_wmi_get_hw_state(HPWMI_WIFI));
537                 if (bluetooth_rfkill)
538                         rfkill_set_states(bluetooth_rfkill,
539                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
540                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
541                 if (wwan_rfkill)
542                         rfkill_set_states(wwan_rfkill,
543                                           hp_wmi_get_sw_state(HPWMI_WWAN),
544                                           hp_wmi_get_hw_state(HPWMI_WWAN));
545                 break;
546         case HPWMI_CPU_BATTERY_THROTTLE:
547                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
548                 break;
549         case HPWMI_LOCK_SWITCH:
550                 break;
551         default:
552                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
553                 break;
554         }
555 }
556
557 static int __init hp_wmi_input_setup(void)
558 {
559         acpi_status status;
560         int err;
561
562         hp_wmi_input_dev = input_allocate_device();
563         if (!hp_wmi_input_dev)
564                 return -ENOMEM;
565
566         hp_wmi_input_dev->name = "HP WMI hotkeys";
567         hp_wmi_input_dev->phys = "wmi/input0";
568         hp_wmi_input_dev->id.bustype = BUS_HOST;
569
570         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
571         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
572         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
573
574         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
575         if (err)
576                 goto err_free_dev;
577
578         /* Set initial hardware state */
579         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
580         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
581                             hp_wmi_tablet_state());
582         input_sync(hp_wmi_input_dev);
583
584         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
585         if (ACPI_FAILURE(status)) {
586                 err = -EIO;
587                 goto err_free_keymap;
588         }
589
590         err = input_register_device(hp_wmi_input_dev);
591         if (err)
592                 goto err_uninstall_notifier;
593
594         return 0;
595
596  err_uninstall_notifier:
597         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
598  err_free_keymap:
599         sparse_keymap_free(hp_wmi_input_dev);
600  err_free_dev:
601         input_free_device(hp_wmi_input_dev);
602         return err;
603 }
604
605 static void hp_wmi_input_destroy(void)
606 {
607         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
608         sparse_keymap_free(hp_wmi_input_dev);
609         input_unregister_device(hp_wmi_input_dev);
610 }
611
612 static void cleanup_sysfs(struct platform_device *device)
613 {
614         device_remove_file(&device->dev, &dev_attr_display);
615         device_remove_file(&device->dev, &dev_attr_hddtemp);
616         device_remove_file(&device->dev, &dev_attr_als);
617         device_remove_file(&device->dev, &dev_attr_dock);
618         device_remove_file(&device->dev, &dev_attr_tablet);
619 }
620
621 static int __devinit hp_wmi_rfkill_setup(struct platform_device *device)
622 {
623         int err;
624         int wireless = 0;
625
626         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
627                                    sizeof(wireless), sizeof(wireless));
628         if (err)
629                 return err;
630
631         if (wireless & 0x1) {
632                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
633                                            RFKILL_TYPE_WLAN,
634                                            &hp_wmi_rfkill_ops,
635                                            (void *) HPWMI_WIFI);
636                 rfkill_init_sw_state(wifi_rfkill,
637                                      hp_wmi_get_sw_state(HPWMI_WIFI));
638                 rfkill_set_hw_state(wifi_rfkill,
639                                     hp_wmi_get_hw_state(HPWMI_WIFI));
640                 err = rfkill_register(wifi_rfkill);
641                 if (err)
642                         goto register_wifi_error;
643         }
644
645         if (wireless & 0x2) {
646                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
647                                                 RFKILL_TYPE_BLUETOOTH,
648                                                 &hp_wmi_rfkill_ops,
649                                                 (void *) HPWMI_BLUETOOTH);
650                 rfkill_init_sw_state(bluetooth_rfkill,
651                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
652                 rfkill_set_hw_state(bluetooth_rfkill,
653                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
654                 err = rfkill_register(bluetooth_rfkill);
655                 if (err)
656                         goto register_bluetooth_error;
657         }
658
659         if (wireless & 0x4) {
660                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
661                                            RFKILL_TYPE_WWAN,
662                                            &hp_wmi_rfkill_ops,
663                                            (void *) HPWMI_WWAN);
664                 rfkill_init_sw_state(wwan_rfkill,
665                                      hp_wmi_get_sw_state(HPWMI_WWAN));
666                 rfkill_set_hw_state(wwan_rfkill,
667                                     hp_wmi_get_hw_state(HPWMI_WWAN));
668                 err = rfkill_register(wwan_rfkill);
669                 if (err)
670                         goto register_wwan_err;
671         }
672
673         return 0;
674 register_wwan_err:
675         rfkill_destroy(wwan_rfkill);
676         wwan_rfkill = NULL;
677         if (bluetooth_rfkill)
678                 rfkill_unregister(bluetooth_rfkill);
679 register_bluetooth_error:
680         rfkill_destroy(bluetooth_rfkill);
681         bluetooth_rfkill = NULL;
682         if (wifi_rfkill)
683                 rfkill_unregister(wifi_rfkill);
684 register_wifi_error:
685         rfkill_destroy(wifi_rfkill);
686         wifi_rfkill = NULL;
687         return err;
688 }
689
690 static int __devinit hp_wmi_rfkill2_setup(struct platform_device *device)
691 {
692         int err, i;
693         struct bios_rfkill2_state state;
694         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
695                                    0, sizeof(state));
696         if (err)
697                 return err;
698
699         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
700                 pr_warn("unable to parse 0x1b query output\n");
701                 return -EINVAL;
702         }
703
704         for (i = 0; i < state.count; i++) {
705                 struct rfkill *rfkill;
706                 enum rfkill_type type;
707                 char *name;
708                 switch (state.device[i].radio_type) {
709                 case HPWMI_WIFI:
710                         type = RFKILL_TYPE_WLAN;
711                         name = "hp-wifi";
712                         break;
713                 case HPWMI_BLUETOOTH:
714                         type = RFKILL_TYPE_BLUETOOTH;
715                         name = "hp-bluetooth";
716                         break;
717                 case HPWMI_WWAN:
718                         type = RFKILL_TYPE_WWAN;
719                         name = "hp-wwan";
720                         break;
721                 default:
722                         pr_warn("unknown device type 0x%x\n",
723                                 state.device[i].radio_type);
724                         continue;
725                 }
726
727                 if (!state.device[i].vendor_id) {
728                         pr_warn("zero device %d while %d reported\n",
729                                 i, state.count);
730                         continue;
731                 }
732
733                 rfkill = rfkill_alloc(name, &device->dev, type,
734                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
735                 if (!rfkill) {
736                         err = -ENOMEM;
737                         goto fail;
738                 }
739
740                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
741                 rfkill2[rfkill2_count].num = i;
742                 rfkill2[rfkill2_count].rfkill = rfkill;
743
744                 rfkill_init_sw_state(rfkill,
745                                      IS_SWBLOCKED(state.device[i].power));
746                 rfkill_set_hw_state(rfkill,
747                                     IS_HWBLOCKED(state.device[i].power));
748
749                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
750                         pr_info("device %s blocked by BIOS\n", name);
751
752                 err = rfkill_register(rfkill);
753                 if (err) {
754                         rfkill_destroy(rfkill);
755                         goto fail;
756                 }
757
758                 rfkill2_count++;
759         }
760
761         return 0;
762 fail:
763         for (; rfkill2_count > 0; rfkill2_count--) {
764                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
765                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
766         }
767         return err;
768 }
769
770 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
771 {
772         int err;
773
774         /* clear detected rfkill devices */
775         wifi_rfkill = NULL;
776         bluetooth_rfkill = NULL;
777         wwan_rfkill = NULL;
778         rfkill2_count = 0;
779
780         if (hp_wmi_rfkill_setup(device))
781                 hp_wmi_rfkill2_setup(device);
782
783         err = device_create_file(&device->dev, &dev_attr_display);
784         if (err)
785                 goto add_sysfs_error;
786         err = device_create_file(&device->dev, &dev_attr_hddtemp);
787         if (err)
788                 goto add_sysfs_error;
789         err = device_create_file(&device->dev, &dev_attr_als);
790         if (err)
791                 goto add_sysfs_error;
792         err = device_create_file(&device->dev, &dev_attr_dock);
793         if (err)
794                 goto add_sysfs_error;
795         err = device_create_file(&device->dev, &dev_attr_tablet);
796         if (err)
797                 goto add_sysfs_error;
798         return 0;
799
800 add_sysfs_error:
801         cleanup_sysfs(device);
802         return err;
803 }
804
805 static int __exit hp_wmi_bios_remove(struct platform_device *device)
806 {
807         int i;
808         cleanup_sysfs(device);
809
810         for (i = 0; i < rfkill2_count; i++) {
811                 rfkill_unregister(rfkill2[i].rfkill);
812                 rfkill_destroy(rfkill2[i].rfkill);
813         }
814
815         if (wifi_rfkill) {
816                 rfkill_unregister(wifi_rfkill);
817                 rfkill_destroy(wifi_rfkill);
818         }
819         if (bluetooth_rfkill) {
820                 rfkill_unregister(bluetooth_rfkill);
821                 rfkill_destroy(bluetooth_rfkill);
822         }
823         if (wwan_rfkill) {
824                 rfkill_unregister(wwan_rfkill);
825                 rfkill_destroy(wwan_rfkill);
826         }
827
828         return 0;
829 }
830
831 static int hp_wmi_resume_handler(struct device *device)
832 {
833         /*
834          * Hardware state may have changed while suspended, so trigger
835          * input events for the current state. As this is a switch,
836          * the input layer will only actually pass it on if the state
837          * changed.
838          */
839         if (hp_wmi_input_dev) {
840                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
841                                     hp_wmi_dock_state());
842                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
843                                     hp_wmi_tablet_state());
844                 input_sync(hp_wmi_input_dev);
845         }
846
847         if (rfkill2_count)
848                 hp_wmi_rfkill2_refresh();
849
850         if (wifi_rfkill)
851                 rfkill_set_states(wifi_rfkill,
852                                   hp_wmi_get_sw_state(HPWMI_WIFI),
853                                   hp_wmi_get_hw_state(HPWMI_WIFI));
854         if (bluetooth_rfkill)
855                 rfkill_set_states(bluetooth_rfkill,
856                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
857                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
858         if (wwan_rfkill)
859                 rfkill_set_states(wwan_rfkill,
860                                   hp_wmi_get_sw_state(HPWMI_WWAN),
861                                   hp_wmi_get_hw_state(HPWMI_WWAN));
862
863         return 0;
864 }
865
866 static int __init hp_wmi_init(void)
867 {
868         int err;
869         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
870         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
871
872         if (event_capable) {
873                 err = hp_wmi_input_setup();
874                 if (err)
875                         return err;
876         }
877
878         if (bios_capable) {
879                 err = platform_driver_register(&hp_wmi_driver);
880                 if (err)
881                         goto err_driver_reg;
882                 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
883                 if (!hp_wmi_platform_dev) {
884                         err = -ENOMEM;
885                         goto err_device_alloc;
886                 }
887                 err = platform_device_add(hp_wmi_platform_dev);
888                 if (err)
889                         goto err_device_add;
890         }
891
892         if (!bios_capable && !event_capable)
893                 return -ENODEV;
894
895         return 0;
896
897 err_device_add:
898         platform_device_put(hp_wmi_platform_dev);
899 err_device_alloc:
900         platform_driver_unregister(&hp_wmi_driver);
901 err_driver_reg:
902         if (event_capable)
903                 hp_wmi_input_destroy();
904
905         return err;
906 }
907
908 static void __exit hp_wmi_exit(void)
909 {
910         if (wmi_has_guid(HPWMI_EVENT_GUID))
911                 hp_wmi_input_destroy();
912
913         if (hp_wmi_platform_dev) {
914                 platform_device_unregister(hp_wmi_platform_dev);
915                 platform_driver_unregister(&hp_wmi_driver);
916         }
917 }
918
919 module_init(hp_wmi_init);
920 module_exit(hp_wmi_exit);