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Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit
[mirror_ubuntu-artful-kernel.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_BIOS_QUERY 0x9
57 #define HPWMI_FEATURE_QUERY 0xb
58 #define HPWMI_HOTKEY_QUERY 0xc
59 #define HPWMI_FEATURE2_QUERY 0xd
60 #define HPWMI_WIRELESS2_QUERY 0x1b
61 #define HPWMI_POSTCODEERROR_QUERY 0x2a
62
63 enum hp_wmi_radio {
64 HPWMI_WIFI = 0,
65 HPWMI_BLUETOOTH = 1,
66 HPWMI_WWAN = 2,
67 HPWMI_GPS = 3,
68 };
69
70 enum hp_wmi_event_ids {
71 HPWMI_DOCK_EVENT = 1,
72 HPWMI_PARK_HDD = 2,
73 HPWMI_SMART_ADAPTER = 3,
74 HPWMI_BEZEL_BUTTON = 4,
75 HPWMI_WIRELESS = 5,
76 HPWMI_CPU_BATTERY_THROTTLE = 6,
77 HPWMI_LOCK_SWITCH = 7,
78 HPWMI_LID_SWITCH = 8,
79 HPWMI_SCREEN_ROTATION = 9,
80 HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
81 HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
82 HPWMI_PROXIMITY_SENSOR = 0x0C,
83 HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
84 HPWMI_PEAKSHIFT_PERIOD = 0x0F,
85 HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
86 };
87
88 struct bios_args {
89 u32 signature;
90 u32 command;
91 u32 commandtype;
92 u32 datasize;
93 u32 data;
94 };
95
96 struct bios_return {
97 u32 sigpass;
98 u32 return_code;
99 };
100
101 enum hp_return_value {
102 HPWMI_RET_WRONG_SIGNATURE = 0x02,
103 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
104 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
105 HPWMI_RET_INVALID_PARAMETERS = 0x05,
106 };
107
108 enum hp_wireless2_bits {
109 HPWMI_POWER_STATE = 0x01,
110 HPWMI_POWER_SOFT = 0x02,
111 HPWMI_POWER_BIOS = 0x04,
112 HPWMI_POWER_HARD = 0x08,
113 };
114
115 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
116 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
117 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
118
119 struct bios_rfkill2_device_state {
120 u8 radio_type;
121 u8 bus_type;
122 u16 vendor_id;
123 u16 product_id;
124 u16 subsys_vendor_id;
125 u16 subsys_product_id;
126 u8 rfkill_id;
127 u8 power;
128 u8 unknown[4];
129 };
130
131 /* 7 devices fit into the 128 byte buffer */
132 #define HPWMI_MAX_RFKILL2_DEVICES 7
133
134 struct bios_rfkill2_state {
135 u8 unknown[7];
136 u8 count;
137 u8 pad[8];
138 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
139 };
140
141 static const struct key_entry hp_wmi_keymap[] = {
142 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
143 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
144 { KE_KEY, 0x20e6, { KEY_PROG1 } },
145 { KE_KEY, 0x20e8, { KEY_MEDIA } },
146 { KE_KEY, 0x2142, { KEY_MEDIA } },
147 { KE_KEY, 0x213b, { KEY_INFO } },
148 { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
149 { KE_KEY, 0x216a, { KEY_SETUP } },
150 { KE_KEY, 0x231b, { KEY_HELP } },
151 { KE_END, 0 }
152 };
153
154 static struct input_dev *hp_wmi_input_dev;
155 static struct platform_device *hp_wmi_platform_dev;
156
157 static struct rfkill *wifi_rfkill;
158 static struct rfkill *bluetooth_rfkill;
159 static struct rfkill *wwan_rfkill;
160
161 struct rfkill2_device {
162 u8 id;
163 int num;
164 struct rfkill *rfkill;
165 };
166
167 static int rfkill2_count;
168 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
169
170 /*
171 * hp_wmi_perform_query
172 *
173 * query: The commandtype -> What should be queried
174 * write: The command -> 0 read, 1 write, 3 ODM specific
175 * buffer: Buffer used as input and/or output
176 * insize: Size of input buffer
177 * outsize: Size of output buffer
178 *
179 * returns zero on success
180 * an HP WMI query specific error code (which is positive)
181 * -EINVAL if the query was not successful at all
182 * -EINVAL if the output buffer size exceeds buffersize
183 *
184 * Note: The buffersize must at least be the maximum of the input and output
185 * size. E.g. Battery info query (0x7) is defined to have 1 byte input
186 * and 128 byte output. The caller would do:
187 * buffer = kzalloc(128, GFP_KERNEL);
188 * ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
189 */
190 static int hp_wmi_perform_query(int query, int write, void *buffer,
191 int insize, int outsize)
192 {
193 struct bios_return *bios_return;
194 int actual_outsize;
195 union acpi_object *obj;
196 struct bios_args args = {
197 .signature = 0x55434553,
198 .command = write ? 0x2 : 0x1,
199 .commandtype = query,
200 .datasize = insize,
201 .data = 0,
202 };
203 struct acpi_buffer input = { sizeof(struct bios_args), &args };
204 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
205 u32 rc;
206
207 if (WARN_ON(insize > sizeof(args.data)))
208 return -EINVAL;
209 memcpy(&args.data, buffer, insize);
210
211 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
212
213 obj = output.pointer;
214
215 if (!obj)
216 return -EINVAL;
217 else if (obj->type != ACPI_TYPE_BUFFER) {
218 kfree(obj);
219 return -EINVAL;
220 }
221
222 bios_return = (struct bios_return *)obj->buffer.pointer;
223 rc = bios_return->return_code;
224
225 if (rc) {
226 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
227 pr_warn("query 0x%x returned error 0x%x\n", query, rc);
228 kfree(obj);
229 return rc;
230 }
231
232 if (!outsize) {
233 /* ignore output data */
234 kfree(obj);
235 return 0;
236 }
237
238 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
239 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
240 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
241 kfree(obj);
242 return 0;
243 }
244
245 static int hp_wmi_display_state(void)
246 {
247 int state = 0;
248 int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
249 sizeof(state), sizeof(state));
250 if (ret)
251 return -EINVAL;
252 return state;
253 }
254
255 static int hp_wmi_hddtemp_state(void)
256 {
257 int state = 0;
258 int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
259 sizeof(state), sizeof(state));
260 if (ret)
261 return -EINVAL;
262 return state;
263 }
264
265 static int hp_wmi_als_state(void)
266 {
267 int state = 0;
268 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
269 sizeof(state), sizeof(state));
270 if (ret)
271 return -EINVAL;
272 return state;
273 }
274
275 static int hp_wmi_dock_state(void)
276 {
277 int state = 0;
278 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
279 sizeof(state), sizeof(state));
280
281 if (ret)
282 return -EINVAL;
283
284 return state & 0x1;
285 }
286
287 static int hp_wmi_tablet_state(void)
288 {
289 int state = 0;
290 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
291 sizeof(state), sizeof(state));
292 if (ret)
293 return ret;
294
295 return (state & 0x4) ? 1 : 0;
296 }
297
298 static int __init hp_wmi_bios_2008_later(void)
299 {
300 int state = 0;
301 int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, 0, &state,
302 sizeof(state), sizeof(state));
303 if (!ret)
304 return 1;
305
306 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
307 }
308
309 static int __init hp_wmi_bios_2009_later(void)
310 {
311 int state = 0;
312 int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, 0, &state,
313 sizeof(state), sizeof(state));
314 if (!ret)
315 return 1;
316
317 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
318 }
319
320 static int __init hp_wmi_enable_hotkeys(void)
321 {
322 int value = 0x6e;
323 int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &value,
324 sizeof(value), 0);
325 if (ret)
326 return -EINVAL;
327 return 0;
328 }
329
330 static int hp_wmi_set_block(void *data, bool blocked)
331 {
332 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
333 int query = BIT(r + 8) | ((!blocked) << r);
334 int ret;
335
336 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
337 &query, sizeof(query), 0);
338 if (ret)
339 return -EINVAL;
340 return 0;
341 }
342
343 static const struct rfkill_ops hp_wmi_rfkill_ops = {
344 .set_block = hp_wmi_set_block,
345 };
346
347 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
348 {
349 int wireless = 0;
350 int mask;
351 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
352 &wireless, sizeof(wireless),
353 sizeof(wireless));
354 /* TBD: Pass error */
355
356 mask = 0x200 << (r * 8);
357
358 if (wireless & mask)
359 return false;
360 else
361 return true;
362 }
363
364 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
365 {
366 int wireless = 0;
367 int mask;
368 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
369 &wireless, sizeof(wireless),
370 sizeof(wireless));
371 /* TBD: Pass error */
372
373 mask = 0x800 << (r * 8);
374
375 if (wireless & mask)
376 return false;
377 else
378 return true;
379 }
380
381 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
382 {
383 int rfkill_id = (int)(long)data;
384 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
385
386 if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
387 buffer, sizeof(buffer), 0))
388 return -EINVAL;
389 return 0;
390 }
391
392 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
393 .set_block = hp_wmi_rfkill2_set_block,
394 };
395
396 static int hp_wmi_rfkill2_refresh(void)
397 {
398 int err, i;
399 struct bios_rfkill2_state state;
400
401 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
402 0, sizeof(state));
403 if (err)
404 return err;
405
406 for (i = 0; i < rfkill2_count; i++) {
407 int num = rfkill2[i].num;
408 struct bios_rfkill2_device_state *devstate;
409 devstate = &state.device[num];
410
411 if (num >= state.count ||
412 devstate->rfkill_id != rfkill2[i].id) {
413 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
414 continue;
415 }
416
417 rfkill_set_states(rfkill2[i].rfkill,
418 IS_SWBLOCKED(devstate->power),
419 IS_HWBLOCKED(devstate->power));
420 }
421
422 return 0;
423 }
424
425 static int hp_wmi_post_code_state(void)
426 {
427 int state = 0;
428 int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
429 sizeof(state), sizeof(state));
430 if (ret)
431 return -EINVAL;
432 return state;
433 }
434
435 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
436 char *buf)
437 {
438 int value = hp_wmi_display_state();
439 if (value < 0)
440 return -EINVAL;
441 return sprintf(buf, "%d\n", value);
442 }
443
444 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
445 char *buf)
446 {
447 int value = hp_wmi_hddtemp_state();
448 if (value < 0)
449 return -EINVAL;
450 return sprintf(buf, "%d\n", value);
451 }
452
453 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
454 char *buf)
455 {
456 int value = hp_wmi_als_state();
457 if (value < 0)
458 return -EINVAL;
459 return sprintf(buf, "%d\n", value);
460 }
461
462 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
463 char *buf)
464 {
465 int value = hp_wmi_dock_state();
466 if (value < 0)
467 return -EINVAL;
468 return sprintf(buf, "%d\n", value);
469 }
470
471 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
472 char *buf)
473 {
474 int value = hp_wmi_tablet_state();
475 if (value < 0)
476 return -EINVAL;
477 return sprintf(buf, "%d\n", value);
478 }
479
480 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
481 char *buf)
482 {
483 /* Get the POST error code of previous boot failure. */
484 int value = hp_wmi_post_code_state();
485 if (value < 0)
486 return -EINVAL;
487 return sprintf(buf, "0x%x\n", value);
488 }
489
490 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
491 const char *buf, size_t count)
492 {
493 u32 tmp = simple_strtoul(buf, NULL, 10);
494 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
495 sizeof(tmp), sizeof(tmp));
496 if (ret)
497 return -EINVAL;
498
499 return count;
500 }
501
502 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
503 const char *buf, size_t count)
504 {
505 int ret;
506 u32 tmp;
507 long unsigned int tmp2;
508
509 ret = kstrtoul(buf, 10, &tmp2);
510 if (ret || tmp2 != 1)
511 return -EINVAL;
512
513 /* Clear the POST error code. It is kept until until cleared. */
514 tmp = (u32) tmp2;
515 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
516 sizeof(tmp), sizeof(tmp));
517 if (ret)
518 return -EINVAL;
519
520 return count;
521 }
522
523 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
524 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
525 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
526 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
527 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
528 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
529
530 static void hp_wmi_notify(u32 value, void *context)
531 {
532 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
533 union acpi_object *obj;
534 u32 event_id, event_data;
535 int key_code = 0, ret;
536 u32 *location;
537 acpi_status status;
538
539 status = wmi_get_event_data(value, &response);
540 if (status != AE_OK) {
541 pr_info("bad event status 0x%x\n", status);
542 return;
543 }
544
545 obj = (union acpi_object *)response.pointer;
546
547 if (!obj)
548 return;
549 if (obj->type != ACPI_TYPE_BUFFER) {
550 pr_info("Unknown response received %d\n", obj->type);
551 kfree(obj);
552 return;
553 }
554
555 /*
556 * Depending on ACPI version the concatenation of id and event data
557 * inside _WED function will result in a 8 or 16 byte buffer.
558 */
559 location = (u32 *)obj->buffer.pointer;
560 if (obj->buffer.length == 8) {
561 event_id = *location;
562 event_data = *(location + 1);
563 } else if (obj->buffer.length == 16) {
564 event_id = *location;
565 event_data = *(location + 2);
566 } else {
567 pr_info("Unknown buffer length %d\n", obj->buffer.length);
568 kfree(obj);
569 return;
570 }
571 kfree(obj);
572
573 switch (event_id) {
574 case HPWMI_DOCK_EVENT:
575 input_report_switch(hp_wmi_input_dev, SW_DOCK,
576 hp_wmi_dock_state());
577 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
578 hp_wmi_tablet_state());
579 input_sync(hp_wmi_input_dev);
580 break;
581 case HPWMI_PARK_HDD:
582 break;
583 case HPWMI_SMART_ADAPTER:
584 break;
585 case HPWMI_BEZEL_BUTTON:
586 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
587 &key_code,
588 sizeof(key_code),
589 sizeof(key_code));
590 if (ret)
591 break;
592
593 if (!sparse_keymap_report_event(hp_wmi_input_dev,
594 key_code, 1, true))
595 pr_info("Unknown key code - 0x%x\n", key_code);
596 break;
597 case HPWMI_WIRELESS:
598 if (rfkill2_count) {
599 hp_wmi_rfkill2_refresh();
600 break;
601 }
602
603 if (wifi_rfkill)
604 rfkill_set_states(wifi_rfkill,
605 hp_wmi_get_sw_state(HPWMI_WIFI),
606 hp_wmi_get_hw_state(HPWMI_WIFI));
607 if (bluetooth_rfkill)
608 rfkill_set_states(bluetooth_rfkill,
609 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
610 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
611 if (wwan_rfkill)
612 rfkill_set_states(wwan_rfkill,
613 hp_wmi_get_sw_state(HPWMI_WWAN),
614 hp_wmi_get_hw_state(HPWMI_WWAN));
615 break;
616 case HPWMI_CPU_BATTERY_THROTTLE:
617 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
618 break;
619 case HPWMI_LOCK_SWITCH:
620 break;
621 case HPWMI_LID_SWITCH:
622 break;
623 case HPWMI_SCREEN_ROTATION:
624 break;
625 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
626 break;
627 case HPWMI_COOLSENSE_SYSTEM_HOT:
628 break;
629 case HPWMI_PROXIMITY_SENSOR:
630 break;
631 case HPWMI_BACKLIT_KB_BRIGHTNESS:
632 break;
633 case HPWMI_PEAKSHIFT_PERIOD:
634 break;
635 case HPWMI_BATTERY_CHARGE_PERIOD:
636 break;
637 default:
638 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
639 break;
640 }
641 }
642
643 static int __init hp_wmi_input_setup(void)
644 {
645 acpi_status status;
646 int err;
647
648 hp_wmi_input_dev = input_allocate_device();
649 if (!hp_wmi_input_dev)
650 return -ENOMEM;
651
652 hp_wmi_input_dev->name = "HP WMI hotkeys";
653 hp_wmi_input_dev->phys = "wmi/input0";
654 hp_wmi_input_dev->id.bustype = BUS_HOST;
655
656 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
657 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
658 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
659
660 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
661 if (err)
662 goto err_free_dev;
663
664 /* Set initial hardware state */
665 input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
666 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
667 hp_wmi_tablet_state());
668 input_sync(hp_wmi_input_dev);
669
670 if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
671 hp_wmi_enable_hotkeys();
672
673 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
674 if (ACPI_FAILURE(status)) {
675 err = -EIO;
676 goto err_free_keymap;
677 }
678
679 err = input_register_device(hp_wmi_input_dev);
680 if (err)
681 goto err_uninstall_notifier;
682
683 return 0;
684
685 err_uninstall_notifier:
686 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
687 err_free_keymap:
688 sparse_keymap_free(hp_wmi_input_dev);
689 err_free_dev:
690 input_free_device(hp_wmi_input_dev);
691 return err;
692 }
693
694 static void hp_wmi_input_destroy(void)
695 {
696 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
697 sparse_keymap_free(hp_wmi_input_dev);
698 input_unregister_device(hp_wmi_input_dev);
699 }
700
701 static void cleanup_sysfs(struct platform_device *device)
702 {
703 device_remove_file(&device->dev, &dev_attr_display);
704 device_remove_file(&device->dev, &dev_attr_hddtemp);
705 device_remove_file(&device->dev, &dev_attr_als);
706 device_remove_file(&device->dev, &dev_attr_dock);
707 device_remove_file(&device->dev, &dev_attr_tablet);
708 device_remove_file(&device->dev, &dev_attr_postcode);
709 }
710
711 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
712 {
713 int err;
714 int wireless = 0;
715
716 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
717 sizeof(wireless), sizeof(wireless));
718 if (err)
719 return err;
720
721 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, &wireless,
722 sizeof(wireless), 0);
723 if (err)
724 return err;
725
726 if (wireless & 0x1) {
727 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
728 RFKILL_TYPE_WLAN,
729 &hp_wmi_rfkill_ops,
730 (void *) HPWMI_WIFI);
731 if (!wifi_rfkill)
732 return -ENOMEM;
733 rfkill_init_sw_state(wifi_rfkill,
734 hp_wmi_get_sw_state(HPWMI_WIFI));
735 rfkill_set_hw_state(wifi_rfkill,
736 hp_wmi_get_hw_state(HPWMI_WIFI));
737 err = rfkill_register(wifi_rfkill);
738 if (err)
739 goto register_wifi_error;
740 }
741
742 if (wireless & 0x2) {
743 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
744 RFKILL_TYPE_BLUETOOTH,
745 &hp_wmi_rfkill_ops,
746 (void *) HPWMI_BLUETOOTH);
747 if (!bluetooth_rfkill) {
748 err = -ENOMEM;
749 goto register_bluetooth_error;
750 }
751 rfkill_init_sw_state(bluetooth_rfkill,
752 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
753 rfkill_set_hw_state(bluetooth_rfkill,
754 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
755 err = rfkill_register(bluetooth_rfkill);
756 if (err)
757 goto register_bluetooth_error;
758 }
759
760 if (wireless & 0x4) {
761 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
762 RFKILL_TYPE_WWAN,
763 &hp_wmi_rfkill_ops,
764 (void *) HPWMI_WWAN);
765 if (!wwan_rfkill) {
766 err = -ENOMEM;
767 goto register_wwan_error;
768 }
769 rfkill_init_sw_state(wwan_rfkill,
770 hp_wmi_get_sw_state(HPWMI_WWAN));
771 rfkill_set_hw_state(wwan_rfkill,
772 hp_wmi_get_hw_state(HPWMI_WWAN));
773 err = rfkill_register(wwan_rfkill);
774 if (err)
775 goto register_wwan_error;
776 }
777
778 return 0;
779
780 register_wwan_error:
781 rfkill_destroy(wwan_rfkill);
782 wwan_rfkill = NULL;
783 if (bluetooth_rfkill)
784 rfkill_unregister(bluetooth_rfkill);
785 register_bluetooth_error:
786 rfkill_destroy(bluetooth_rfkill);
787 bluetooth_rfkill = NULL;
788 if (wifi_rfkill)
789 rfkill_unregister(wifi_rfkill);
790 register_wifi_error:
791 rfkill_destroy(wifi_rfkill);
792 wifi_rfkill = NULL;
793 return err;
794 }
795
796 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
797 {
798 int err, i;
799 struct bios_rfkill2_state state;
800 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
801 0, sizeof(state));
802 if (err)
803 return err;
804
805 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
806 pr_warn("unable to parse 0x1b query output\n");
807 return -EINVAL;
808 }
809
810 for (i = 0; i < state.count; i++) {
811 struct rfkill *rfkill;
812 enum rfkill_type type;
813 char *name;
814 switch (state.device[i].radio_type) {
815 case HPWMI_WIFI:
816 type = RFKILL_TYPE_WLAN;
817 name = "hp-wifi";
818 break;
819 case HPWMI_BLUETOOTH:
820 type = RFKILL_TYPE_BLUETOOTH;
821 name = "hp-bluetooth";
822 break;
823 case HPWMI_WWAN:
824 type = RFKILL_TYPE_WWAN;
825 name = "hp-wwan";
826 break;
827 case HPWMI_GPS:
828 type = RFKILL_TYPE_GPS;
829 name = "hp-gps";
830 break;
831 default:
832 pr_warn("unknown device type 0x%x\n",
833 state.device[i].radio_type);
834 continue;
835 }
836
837 if (!state.device[i].vendor_id) {
838 pr_warn("zero device %d while %d reported\n",
839 i, state.count);
840 continue;
841 }
842
843 rfkill = rfkill_alloc(name, &device->dev, type,
844 &hp_wmi_rfkill2_ops, (void *)(long)i);
845 if (!rfkill) {
846 err = -ENOMEM;
847 goto fail;
848 }
849
850 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
851 rfkill2[rfkill2_count].num = i;
852 rfkill2[rfkill2_count].rfkill = rfkill;
853
854 rfkill_init_sw_state(rfkill,
855 IS_SWBLOCKED(state.device[i].power));
856 rfkill_set_hw_state(rfkill,
857 IS_HWBLOCKED(state.device[i].power));
858
859 if (!(state.device[i].power & HPWMI_POWER_BIOS))
860 pr_info("device %s blocked by BIOS\n", name);
861
862 err = rfkill_register(rfkill);
863 if (err) {
864 rfkill_destroy(rfkill);
865 goto fail;
866 }
867
868 rfkill2_count++;
869 }
870
871 return 0;
872 fail:
873 for (; rfkill2_count > 0; rfkill2_count--) {
874 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
875 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
876 }
877 return err;
878 }
879
880 static int __init hp_wmi_bios_setup(struct platform_device *device)
881 {
882 int err;
883
884 /* clear detected rfkill devices */
885 wifi_rfkill = NULL;
886 bluetooth_rfkill = NULL;
887 wwan_rfkill = NULL;
888 rfkill2_count = 0;
889
890 if (hp_wmi_rfkill_setup(device))
891 hp_wmi_rfkill2_setup(device);
892
893 err = device_create_file(&device->dev, &dev_attr_display);
894 if (err)
895 goto add_sysfs_error;
896 err = device_create_file(&device->dev, &dev_attr_hddtemp);
897 if (err)
898 goto add_sysfs_error;
899 err = device_create_file(&device->dev, &dev_attr_als);
900 if (err)
901 goto add_sysfs_error;
902 err = device_create_file(&device->dev, &dev_attr_dock);
903 if (err)
904 goto add_sysfs_error;
905 err = device_create_file(&device->dev, &dev_attr_tablet);
906 if (err)
907 goto add_sysfs_error;
908 err = device_create_file(&device->dev, &dev_attr_postcode);
909 if (err)
910 goto add_sysfs_error;
911 return 0;
912
913 add_sysfs_error:
914 cleanup_sysfs(device);
915 return err;
916 }
917
918 static int __exit hp_wmi_bios_remove(struct platform_device *device)
919 {
920 int i;
921 cleanup_sysfs(device);
922
923 for (i = 0; i < rfkill2_count; i++) {
924 rfkill_unregister(rfkill2[i].rfkill);
925 rfkill_destroy(rfkill2[i].rfkill);
926 }
927
928 if (wifi_rfkill) {
929 rfkill_unregister(wifi_rfkill);
930 rfkill_destroy(wifi_rfkill);
931 }
932 if (bluetooth_rfkill) {
933 rfkill_unregister(bluetooth_rfkill);
934 rfkill_destroy(bluetooth_rfkill);
935 }
936 if (wwan_rfkill) {
937 rfkill_unregister(wwan_rfkill);
938 rfkill_destroy(wwan_rfkill);
939 }
940
941 return 0;
942 }
943
944 static int hp_wmi_resume_handler(struct device *device)
945 {
946 /*
947 * Hardware state may have changed while suspended, so trigger
948 * input events for the current state. As this is a switch,
949 * the input layer will only actually pass it on if the state
950 * changed.
951 */
952 if (hp_wmi_input_dev) {
953 input_report_switch(hp_wmi_input_dev, SW_DOCK,
954 hp_wmi_dock_state());
955 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
956 hp_wmi_tablet_state());
957 input_sync(hp_wmi_input_dev);
958 }
959
960 if (rfkill2_count)
961 hp_wmi_rfkill2_refresh();
962
963 if (wifi_rfkill)
964 rfkill_set_states(wifi_rfkill,
965 hp_wmi_get_sw_state(HPWMI_WIFI),
966 hp_wmi_get_hw_state(HPWMI_WIFI));
967 if (bluetooth_rfkill)
968 rfkill_set_states(bluetooth_rfkill,
969 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
970 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
971 if (wwan_rfkill)
972 rfkill_set_states(wwan_rfkill,
973 hp_wmi_get_sw_state(HPWMI_WWAN),
974 hp_wmi_get_hw_state(HPWMI_WWAN));
975
976 return 0;
977 }
978
979 static const struct dev_pm_ops hp_wmi_pm_ops = {
980 .resume = hp_wmi_resume_handler,
981 .restore = hp_wmi_resume_handler,
982 };
983
984 static struct platform_driver hp_wmi_driver = {
985 .driver = {
986 .name = "hp-wmi",
987 .pm = &hp_wmi_pm_ops,
988 },
989 .remove = __exit_p(hp_wmi_bios_remove),
990 };
991
992 static int __init hp_wmi_init(void)
993 {
994 int err;
995 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
996 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
997
998 if (!bios_capable && !event_capable)
999 return -ENODEV;
1000
1001 if (event_capable) {
1002 err = hp_wmi_input_setup();
1003 if (err)
1004 return err;
1005 }
1006
1007 if (bios_capable) {
1008 hp_wmi_platform_dev =
1009 platform_device_register_simple("hp-wmi", -1, NULL, 0);
1010 if (IS_ERR(hp_wmi_platform_dev)) {
1011 err = PTR_ERR(hp_wmi_platform_dev);
1012 goto err_destroy_input;
1013 }
1014
1015 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1016 if (err)
1017 goto err_unregister_device;
1018 }
1019
1020 return 0;
1021
1022 err_unregister_device:
1023 platform_device_unregister(hp_wmi_platform_dev);
1024 err_destroy_input:
1025 if (event_capable)
1026 hp_wmi_input_destroy();
1027
1028 return err;
1029 }
1030 module_init(hp_wmi_init);
1031
1032 static void __exit hp_wmi_exit(void)
1033 {
1034 if (wmi_has_guid(HPWMI_EVENT_GUID))
1035 hp_wmi_input_destroy();
1036
1037 if (hp_wmi_platform_dev) {
1038 platform_device_unregister(hp_wmi_platform_dev);
1039 platform_driver_unregister(&hp_wmi_driver);
1040 }
1041 }
1042 module_exit(hp_wmi_exit);
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