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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
41MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
42MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
43MODULE_LICENSE("GPL");
44
45MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
46MODULE_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
63enum hp_wmi_radio {
64 HPWMI_WIFI = 0,
65 HPWMI_BLUETOOTH = 1,
66 HPWMI_WWAN = 2,
67 HPWMI_GPS = 3,
68};
69
70enum 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
88struct bios_args {
89 u32 signature;
90 u32 command;
91 u32 commandtype;
92 u32 datasize;
93 u32 data;
94};
95
96struct bios_return {
97 u32 sigpass;
98 u32 return_code;
99};
100
101enum 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
108enum 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
119struct 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
134struct 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
141static 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
154static struct input_dev *hp_wmi_input_dev;
155static struct platform_device *hp_wmi_platform_dev;
156
157static struct rfkill *wifi_rfkill;
158static struct rfkill *bluetooth_rfkill;
159static struct rfkill *wwan_rfkill;
160
161struct rfkill2_device {
162 u8 id;
163 int num;
164 struct rfkill *rfkill;
165};
166
167static int rfkill2_count;
168static 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 */
190static 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
245static 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
255static 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
265static 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
275static 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
287static 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
298static 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
309static 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
320static 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
330static 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
343static const struct rfkill_ops hp_wmi_rfkill_ops = {
344 .set_block = hp_wmi_set_block,
345};
346
347static 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
364static 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
381static 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
392static const struct rfkill_ops hp_wmi_rfkill2_ops = {
393 .set_block = hp_wmi_rfkill2_set_block,
394};
395
396static 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
425static 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
435static 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
444static 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
453static 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
462static 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
471static 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
480static 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
490static 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
502static 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
523static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
524static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
525static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
526static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
527static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
528static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
529
530static 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
643static 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
694static 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
701static 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
711static 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 if (wireless & 0x1) {
722 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
723 RFKILL_TYPE_WLAN,
724 &hp_wmi_rfkill_ops,
725 (void *) HPWMI_WIFI);
726 if (!wifi_rfkill)
727 return -ENOMEM;
728 rfkill_init_sw_state(wifi_rfkill,
729 hp_wmi_get_sw_state(HPWMI_WIFI));
730 rfkill_set_hw_state(wifi_rfkill,
731 hp_wmi_get_hw_state(HPWMI_WIFI));
732 err = rfkill_register(wifi_rfkill);
733 if (err)
734 goto register_wifi_error;
735 }
736
737 if (wireless & 0x2) {
738 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
739 RFKILL_TYPE_BLUETOOTH,
740 &hp_wmi_rfkill_ops,
741 (void *) HPWMI_BLUETOOTH);
742 if (!bluetooth_rfkill) {
743 err = -ENOMEM;
744 goto register_bluetooth_error;
745 }
746 rfkill_init_sw_state(bluetooth_rfkill,
747 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
748 rfkill_set_hw_state(bluetooth_rfkill,
749 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
750 err = rfkill_register(bluetooth_rfkill);
751 if (err)
752 goto register_bluetooth_error;
753 }
754
755 if (wireless & 0x4) {
756 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
757 RFKILL_TYPE_WWAN,
758 &hp_wmi_rfkill_ops,
759 (void *) HPWMI_WWAN);
760 if (!wwan_rfkill) {
761 err = -ENOMEM;
762 goto register_wwan_error;
763 }
764 rfkill_init_sw_state(wwan_rfkill,
765 hp_wmi_get_sw_state(HPWMI_WWAN));
766 rfkill_set_hw_state(wwan_rfkill,
767 hp_wmi_get_hw_state(HPWMI_WWAN));
768 err = rfkill_register(wwan_rfkill);
769 if (err)
770 goto register_wwan_error;
771 }
772
773 return 0;
774
775register_wwan_error:
776 rfkill_destroy(wwan_rfkill);
777 wwan_rfkill = NULL;
778 if (bluetooth_rfkill)
779 rfkill_unregister(bluetooth_rfkill);
780register_bluetooth_error:
781 rfkill_destroy(bluetooth_rfkill);
782 bluetooth_rfkill = NULL;
783 if (wifi_rfkill)
784 rfkill_unregister(wifi_rfkill);
785register_wifi_error:
786 rfkill_destroy(wifi_rfkill);
787 wifi_rfkill = NULL;
788 return err;
789}
790
791static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
792{
793 int err, i;
794 struct bios_rfkill2_state state;
795 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
796 0, sizeof(state));
797 if (err)
798 return err;
799
800 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
801 pr_warn("unable to parse 0x1b query output\n");
802 return -EINVAL;
803 }
804
805 for (i = 0; i < state.count; i++) {
806 struct rfkill *rfkill;
807 enum rfkill_type type;
808 char *name;
809 switch (state.device[i].radio_type) {
810 case HPWMI_WIFI:
811 type = RFKILL_TYPE_WLAN;
812 name = "hp-wifi";
813 break;
814 case HPWMI_BLUETOOTH:
815 type = RFKILL_TYPE_BLUETOOTH;
816 name = "hp-bluetooth";
817 break;
818 case HPWMI_WWAN:
819 type = RFKILL_TYPE_WWAN;
820 name = "hp-wwan";
821 break;
822 case HPWMI_GPS:
823 type = RFKILL_TYPE_GPS;
824 name = "hp-gps";
825 break;
826 default:
827 pr_warn("unknown device type 0x%x\n",
828 state.device[i].radio_type);
829 continue;
830 }
831
832 if (!state.device[i].vendor_id) {
833 pr_warn("zero device %d while %d reported\n",
834 i, state.count);
835 continue;
836 }
837
838 rfkill = rfkill_alloc(name, &device->dev, type,
839 &hp_wmi_rfkill2_ops, (void *)(long)i);
840 if (!rfkill) {
841 err = -ENOMEM;
842 goto fail;
843 }
844
845 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
846 rfkill2[rfkill2_count].num = i;
847 rfkill2[rfkill2_count].rfkill = rfkill;
848
849 rfkill_init_sw_state(rfkill,
850 IS_SWBLOCKED(state.device[i].power));
851 rfkill_set_hw_state(rfkill,
852 IS_HWBLOCKED(state.device[i].power));
853
854 if (!(state.device[i].power & HPWMI_POWER_BIOS))
855 pr_info("device %s blocked by BIOS\n", name);
856
857 err = rfkill_register(rfkill);
858 if (err) {
859 rfkill_destroy(rfkill);
860 goto fail;
861 }
862
863 rfkill2_count++;
864 }
865
866 return 0;
867fail:
868 for (; rfkill2_count > 0; rfkill2_count--) {
869 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
870 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
871 }
872 return err;
873}
874
875static int __init hp_wmi_bios_setup(struct platform_device *device)
876{
877 int err;
878
879 /* clear detected rfkill devices */
880 wifi_rfkill = NULL;
881 bluetooth_rfkill = NULL;
882 wwan_rfkill = NULL;
883 rfkill2_count = 0;
884
885 if (hp_wmi_bios_2009_later() || hp_wmi_rfkill_setup(device))
886 hp_wmi_rfkill2_setup(device);
887
888 err = device_create_file(&device->dev, &dev_attr_display);
889 if (err)
890 goto add_sysfs_error;
891 err = device_create_file(&device->dev, &dev_attr_hddtemp);
892 if (err)
893 goto add_sysfs_error;
894 err = device_create_file(&device->dev, &dev_attr_als);
895 if (err)
896 goto add_sysfs_error;
897 err = device_create_file(&device->dev, &dev_attr_dock);
898 if (err)
899 goto add_sysfs_error;
900 err = device_create_file(&device->dev, &dev_attr_tablet);
901 if (err)
902 goto add_sysfs_error;
903 err = device_create_file(&device->dev, &dev_attr_postcode);
904 if (err)
905 goto add_sysfs_error;
906 return 0;
907
908add_sysfs_error:
909 cleanup_sysfs(device);
910 return err;
911}
912
913static int __exit hp_wmi_bios_remove(struct platform_device *device)
914{
915 int i;
916 cleanup_sysfs(device);
917
918 for (i = 0; i < rfkill2_count; i++) {
919 rfkill_unregister(rfkill2[i].rfkill);
920 rfkill_destroy(rfkill2[i].rfkill);
921 }
922
923 if (wifi_rfkill) {
924 rfkill_unregister(wifi_rfkill);
925 rfkill_destroy(wifi_rfkill);
926 }
927 if (bluetooth_rfkill) {
928 rfkill_unregister(bluetooth_rfkill);
929 rfkill_destroy(bluetooth_rfkill);
930 }
931 if (wwan_rfkill) {
932 rfkill_unregister(wwan_rfkill);
933 rfkill_destroy(wwan_rfkill);
934 }
935
936 return 0;
937}
938
939static int hp_wmi_resume_handler(struct device *device)
940{
941 /*
942 * Hardware state may have changed while suspended, so trigger
943 * input events for the current state. As this is a switch,
944 * the input layer will only actually pass it on if the state
945 * changed.
946 */
947 if (hp_wmi_input_dev) {
948 input_report_switch(hp_wmi_input_dev, SW_DOCK,
949 hp_wmi_dock_state());
950 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
951 hp_wmi_tablet_state());
952 input_sync(hp_wmi_input_dev);
953 }
954
955 if (rfkill2_count)
956 hp_wmi_rfkill2_refresh();
957
958 if (wifi_rfkill)
959 rfkill_set_states(wifi_rfkill,
960 hp_wmi_get_sw_state(HPWMI_WIFI),
961 hp_wmi_get_hw_state(HPWMI_WIFI));
962 if (bluetooth_rfkill)
963 rfkill_set_states(bluetooth_rfkill,
964 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
965 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
966 if (wwan_rfkill)
967 rfkill_set_states(wwan_rfkill,
968 hp_wmi_get_sw_state(HPWMI_WWAN),
969 hp_wmi_get_hw_state(HPWMI_WWAN));
970
971 return 0;
972}
973
974static const struct dev_pm_ops hp_wmi_pm_ops = {
975 .resume = hp_wmi_resume_handler,
976 .restore = hp_wmi_resume_handler,
977};
978
979static struct platform_driver hp_wmi_driver = {
980 .driver = {
981 .name = "hp-wmi",
982 .pm = &hp_wmi_pm_ops,
983 },
984 .remove = __exit_p(hp_wmi_bios_remove),
985};
986
987static int __init hp_wmi_init(void)
988{
989 int err;
990 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
991 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
992
993 if (!bios_capable && !event_capable)
994 return -ENODEV;
995
996 if (event_capable) {
997 err = hp_wmi_input_setup();
998 if (err)
999 return err;
1000 }
1001
1002 if (bios_capable) {
1003 hp_wmi_platform_dev =
1004 platform_device_register_simple("hp-wmi", -1, NULL, 0);
1005 if (IS_ERR(hp_wmi_platform_dev)) {
1006 err = PTR_ERR(hp_wmi_platform_dev);
1007 goto err_destroy_input;
1008 }
1009
1010 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1011 if (err)
1012 goto err_unregister_device;
1013 }
1014
1015 return 0;
1016
1017err_unregister_device:
1018 platform_device_unregister(hp_wmi_platform_dev);
1019err_destroy_input:
1020 if (event_capable)
1021 hp_wmi_input_destroy();
1022
1023 return err;
1024}
1025module_init(hp_wmi_init);
1026
1027static void __exit hp_wmi_exit(void)
1028{
1029 if (wmi_has_guid(HPWMI_EVENT_GUID))
1030 hp_wmi_input_destroy();
1031
1032 if (hp_wmi_platform_dev) {
1033 platform_device_unregister(hp_wmi_platform_dev);
1034 platform_driver_unregister(&hp_wmi_driver);
1035 }
1036}
1037module_exit(hp_wmi_exit);
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
41MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
42MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
43MODULE_LICENSE("GPL");
44
45MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
46MODULE_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
51enum hp_wmi_radio {
52 HPWMI_WIFI = 0x0,
53 HPWMI_BLUETOOTH = 0x1,
54 HPWMI_WWAN = 0x2,
55 HPWMI_GPS = 0x3,
56};
57
58enum hp_wmi_event_ids {
59 HPWMI_DOCK_EVENT = 0x01,
60 HPWMI_PARK_HDD = 0x02,
61 HPWMI_SMART_ADAPTER = 0x03,
62 HPWMI_BEZEL_BUTTON = 0x04,
63 HPWMI_WIRELESS = 0x05,
64 HPWMI_CPU_BATTERY_THROTTLE = 0x06,
65 HPWMI_LOCK_SWITCH = 0x07,
66 HPWMI_LID_SWITCH = 0x08,
67 HPWMI_SCREEN_ROTATION = 0x09,
68 HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
69 HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
70 HPWMI_PROXIMITY_SENSOR = 0x0C,
71 HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
72 HPWMI_PEAKSHIFT_PERIOD = 0x0F,
73 HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
74};
75
76struct bios_args {
77 u32 signature;
78 u32 command;
79 u32 commandtype;
80 u32 datasize;
81 u32 data;
82};
83
84enum hp_wmi_commandtype {
85 HPWMI_DISPLAY_QUERY = 0x01,
86 HPWMI_HDDTEMP_QUERY = 0x02,
87 HPWMI_ALS_QUERY = 0x03,
88 HPWMI_HARDWARE_QUERY = 0x04,
89 HPWMI_WIRELESS_QUERY = 0x05,
90 HPWMI_BATTERY_QUERY = 0x07,
91 HPWMI_BIOS_QUERY = 0x09,
92 HPWMI_FEATURE_QUERY = 0x0b,
93 HPWMI_HOTKEY_QUERY = 0x0c,
94 HPWMI_FEATURE2_QUERY = 0x0d,
95 HPWMI_WIRELESS2_QUERY = 0x1b,
96 HPWMI_POSTCODEERROR_QUERY = 0x2a,
97};
98
99enum hp_wmi_command {
100 HPWMI_READ = 0x01,
101 HPWMI_WRITE = 0x02,
102 HPWMI_ODM = 0x03,
103};
104
105enum hp_wmi_hardware_mask {
106 HPWMI_DOCK_MASK = 0x01,
107 HPWMI_TABLET_MASK = 0x04,
108};
109
110struct bios_return {
111 u32 sigpass;
112 u32 return_code;
113};
114
115enum hp_return_value {
116 HPWMI_RET_WRONG_SIGNATURE = 0x02,
117 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
118 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
119 HPWMI_RET_INVALID_PARAMETERS = 0x05,
120};
121
122enum hp_wireless2_bits {
123 HPWMI_POWER_STATE = 0x01,
124 HPWMI_POWER_SOFT = 0x02,
125 HPWMI_POWER_BIOS = 0x04,
126 HPWMI_POWER_HARD = 0x08,
127};
128
129#define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
130 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
131#define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
132
133struct bios_rfkill2_device_state {
134 u8 radio_type;
135 u8 bus_type;
136 u16 vendor_id;
137 u16 product_id;
138 u16 subsys_vendor_id;
139 u16 subsys_product_id;
140 u8 rfkill_id;
141 u8 power;
142 u8 unknown[4];
143};
144
145/* 7 devices fit into the 128 byte buffer */
146#define HPWMI_MAX_RFKILL2_DEVICES 7
147
148struct bios_rfkill2_state {
149 u8 unknown[7];
150 u8 count;
151 u8 pad[8];
152 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
153};
154
155static const struct key_entry hp_wmi_keymap[] = {
156 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
157 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
158 { KE_KEY, 0x20e6, { KEY_PROG1 } },
159 { KE_KEY, 0x20e8, { KEY_MEDIA } },
160 { KE_KEY, 0x2142, { KEY_MEDIA } },
161 { KE_KEY, 0x213b, { KEY_INFO } },
162 { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
163 { KE_KEY, 0x216a, { KEY_SETUP } },
164 { KE_KEY, 0x231b, { KEY_HELP } },
165 { KE_END, 0 }
166};
167
168static struct input_dev *hp_wmi_input_dev;
169static struct platform_device *hp_wmi_platform_dev;
170
171static struct rfkill *wifi_rfkill;
172static struct rfkill *bluetooth_rfkill;
173static struct rfkill *wwan_rfkill;
174
175struct rfkill2_device {
176 u8 id;
177 int num;
178 struct rfkill *rfkill;
179};
180
181static int rfkill2_count;
182static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
183
184/* map output size to the corresponding WMI method id */
185static inline int encode_outsize_for_pvsz(int outsize)
186{
187 if (outsize > 4096)
188 return -EINVAL;
189 if (outsize > 1024)
190 return 5;
191 if (outsize > 128)
192 return 4;
193 if (outsize > 4)
194 return 3;
195 if (outsize > 0)
196 return 2;
197 return 1;
198}
199
200/*
201 * hp_wmi_perform_query
202 *
203 * query: The commandtype (enum hp_wmi_commandtype)
204 * write: The command (enum hp_wmi_command)
205 * buffer: Buffer used as input and/or output
206 * insize: Size of input buffer
207 * outsize: Size of output buffer
208 *
209 * returns zero on success
210 * an HP WMI query specific error code (which is positive)
211 * -EINVAL if the query was not successful at all
212 * -EINVAL if the output buffer size exceeds buffersize
213 *
214 * Note: The buffersize must at least be the maximum of the input and output
215 * size. E.g. Battery info query is defined to have 1 byte input
216 * and 128 byte output. The caller would do:
217 * buffer = kzalloc(128, GFP_KERNEL);
218 * ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
219 */
220static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
221 void *buffer, int insize, int outsize)
222{
223 int mid;
224 struct bios_return *bios_return;
225 int actual_outsize;
226 union acpi_object *obj;
227 struct bios_args args = {
228 .signature = 0x55434553,
229 .command = command,
230 .commandtype = query,
231 .datasize = insize,
232 .data = 0,
233 };
234 struct acpi_buffer input = { sizeof(struct bios_args), &args };
235 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
236 int ret = 0;
237
238 mid = encode_outsize_for_pvsz(outsize);
239 if (WARN_ON(mid < 0))
240 return mid;
241
242 if (WARN_ON(insize > sizeof(args.data)))
243 return -EINVAL;
244 memcpy(&args.data, buffer, insize);
245
246 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
247
248 obj = output.pointer;
249
250 if (!obj)
251 return -EINVAL;
252
253 if (obj->type != ACPI_TYPE_BUFFER) {
254 ret = -EINVAL;
255 goto out_free;
256 }
257
258 bios_return = (struct bios_return *)obj->buffer.pointer;
259 ret = bios_return->return_code;
260
261 if (ret) {
262 if (ret != HPWMI_RET_UNKNOWN_CMDTYPE)
263 pr_warn("query 0x%x returned error 0x%x\n", query, ret);
264 goto out_free;
265 }
266
267 /* Ignore output data of zero size */
268 if (!outsize)
269 goto out_free;
270
271 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
272 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
273 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
274
275out_free:
276 kfree(obj);
277 return ret;
278}
279
280static int hp_wmi_read_int(int query)
281{
282 int val = 0, ret;
283
284 ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
285 sizeof(val), sizeof(val));
286
287 if (ret)
288 return ret < 0 ? ret : -EINVAL;
289
290 return val;
291}
292
293static int hp_wmi_hw_state(int mask)
294{
295 int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
296
297 if (state < 0)
298 return state;
299
300 return !!(state & mask);
301}
302
303static int __init hp_wmi_bios_2008_later(void)
304{
305 int state = 0;
306 int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
307 sizeof(state), sizeof(state));
308 if (!ret)
309 return 1;
310
311 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
312}
313
314static int __init hp_wmi_bios_2009_later(void)
315{
316 int state = 0;
317 int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
318 sizeof(state), sizeof(state));
319 if (!ret)
320 return 1;
321
322 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
323}
324
325static int __init hp_wmi_enable_hotkeys(void)
326{
327 int value = 0x6e;
328 int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
329 sizeof(value), 0);
330
331 return ret <= 0 ? ret : -EINVAL;
332}
333
334static int hp_wmi_set_block(void *data, bool blocked)
335{
336 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
337 int query = BIT(r + 8) | ((!blocked) << r);
338 int ret;
339
340 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
341 &query, sizeof(query), 0);
342
343 return ret <= 0 ? ret : -EINVAL;
344}
345
346static const struct rfkill_ops hp_wmi_rfkill_ops = {
347 .set_block = hp_wmi_set_block,
348};
349
350static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
351{
352 int mask = 0x200 << (r * 8);
353
354 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
355
356 /* TBD: Pass error */
357 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
358
359 return !(wireless & mask);
360}
361
362static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
363{
364 int mask = 0x800 << (r * 8);
365
366 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
367
368 /* TBD: Pass error */
369 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
370
371 return !(wireless & mask);
372}
373
374static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
375{
376 int rfkill_id = (int)(long)data;
377 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
378 int ret;
379
380 ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
381 buffer, sizeof(buffer), 0);
382
383 return ret <= 0 ? ret : -EINVAL;
384}
385
386static const struct rfkill_ops hp_wmi_rfkill2_ops = {
387 .set_block = hp_wmi_rfkill2_set_block,
388};
389
390static int hp_wmi_rfkill2_refresh(void)
391{
392 struct bios_rfkill2_state state;
393 int err, i;
394
395 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
396 0, sizeof(state));
397 if (err)
398 return err;
399
400 for (i = 0; i < rfkill2_count; i++) {
401 int num = rfkill2[i].num;
402 struct bios_rfkill2_device_state *devstate;
403 devstate = &state.device[num];
404
405 if (num >= state.count ||
406 devstate->rfkill_id != rfkill2[i].id) {
407 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
408 continue;
409 }
410
411 rfkill_set_states(rfkill2[i].rfkill,
412 IS_SWBLOCKED(devstate->power),
413 IS_HWBLOCKED(devstate->power));
414 }
415
416 return 0;
417}
418
419static ssize_t display_show(struct device *dev, struct device_attribute *attr,
420 char *buf)
421{
422 int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
423 if (value < 0)
424 return value;
425 return sprintf(buf, "%d\n", value);
426}
427
428static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
429 char *buf)
430{
431 int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
432 if (value < 0)
433 return value;
434 return sprintf(buf, "%d\n", value);
435}
436
437static ssize_t als_show(struct device *dev, struct device_attribute *attr,
438 char *buf)
439{
440 int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
441 if (value < 0)
442 return value;
443 return sprintf(buf, "%d\n", value);
444}
445
446static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
447 char *buf)
448{
449 int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
450 if (value < 0)
451 return value;
452 return sprintf(buf, "%d\n", value);
453}
454
455static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
459 if (value < 0)
460 return value;
461 return sprintf(buf, "%d\n", value);
462}
463
464static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
465 char *buf)
466{
467 /* Get the POST error code of previous boot failure. */
468 int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
469 if (value < 0)
470 return value;
471 return sprintf(buf, "0x%x\n", value);
472}
473
474static ssize_t als_store(struct device *dev, struct device_attribute *attr,
475 const char *buf, size_t count)
476{
477 u32 tmp = simple_strtoul(buf, NULL, 10);
478 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
479 sizeof(tmp), sizeof(tmp));
480 if (ret)
481 return ret < 0 ? ret : -EINVAL;
482
483 return count;
484}
485
486static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
487 const char *buf, size_t count)
488{
489 long unsigned int tmp2;
490 int ret;
491 u32 tmp;
492
493 ret = kstrtoul(buf, 10, &tmp2);
494 if (!ret && tmp2 != 1)
495 ret = -EINVAL;
496 if (ret)
497 goto out;
498
499 /* Clear the POST error code. It is kept until until cleared. */
500 tmp = (u32) tmp2;
501 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
502 sizeof(tmp), sizeof(tmp));
503
504out:
505 if (ret)
506 return ret < 0 ? ret : -EINVAL;
507
508 return count;
509}
510
511static DEVICE_ATTR_RO(display);
512static DEVICE_ATTR_RO(hddtemp);
513static DEVICE_ATTR_RW(als);
514static DEVICE_ATTR_RO(dock);
515static DEVICE_ATTR_RO(tablet);
516static DEVICE_ATTR_RW(postcode);
517
518static void hp_wmi_notify(u32 value, void *context)
519{
520 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
521 u32 event_id, event_data;
522 union acpi_object *obj;
523 acpi_status status;
524 u32 *location;
525 int key_code;
526
527 status = wmi_get_event_data(value, &response);
528 if (status != AE_OK) {
529 pr_info("bad event status 0x%x\n", status);
530 return;
531 }
532
533 obj = (union acpi_object *)response.pointer;
534
535 if (!obj)
536 return;
537 if (obj->type != ACPI_TYPE_BUFFER) {
538 pr_info("Unknown response received %d\n", obj->type);
539 kfree(obj);
540 return;
541 }
542
543 /*
544 * Depending on ACPI version the concatenation of id and event data
545 * inside _WED function will result in a 8 or 16 byte buffer.
546 */
547 location = (u32 *)obj->buffer.pointer;
548 if (obj->buffer.length == 8) {
549 event_id = *location;
550 event_data = *(location + 1);
551 } else if (obj->buffer.length == 16) {
552 event_id = *location;
553 event_data = *(location + 2);
554 } else {
555 pr_info("Unknown buffer length %d\n", obj->buffer.length);
556 kfree(obj);
557 return;
558 }
559 kfree(obj);
560
561 switch (event_id) {
562 case HPWMI_DOCK_EVENT:
563 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
564 input_report_switch(hp_wmi_input_dev, SW_DOCK,
565 hp_wmi_hw_state(HPWMI_DOCK_MASK));
566 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
567 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
568 hp_wmi_hw_state(HPWMI_TABLET_MASK));
569 input_sync(hp_wmi_input_dev);
570 break;
571 case HPWMI_PARK_HDD:
572 break;
573 case HPWMI_SMART_ADAPTER:
574 break;
575 case HPWMI_BEZEL_BUTTON:
576 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
577 if (key_code < 0)
578 break;
579
580 if (!sparse_keymap_report_event(hp_wmi_input_dev,
581 key_code, 1, true))
582 pr_info("Unknown key code - 0x%x\n", key_code);
583 break;
584 case HPWMI_WIRELESS:
585 if (rfkill2_count) {
586 hp_wmi_rfkill2_refresh();
587 break;
588 }
589
590 if (wifi_rfkill)
591 rfkill_set_states(wifi_rfkill,
592 hp_wmi_get_sw_state(HPWMI_WIFI),
593 hp_wmi_get_hw_state(HPWMI_WIFI));
594 if (bluetooth_rfkill)
595 rfkill_set_states(bluetooth_rfkill,
596 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
597 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
598 if (wwan_rfkill)
599 rfkill_set_states(wwan_rfkill,
600 hp_wmi_get_sw_state(HPWMI_WWAN),
601 hp_wmi_get_hw_state(HPWMI_WWAN));
602 break;
603 case HPWMI_CPU_BATTERY_THROTTLE:
604 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
605 break;
606 case HPWMI_LOCK_SWITCH:
607 break;
608 case HPWMI_LID_SWITCH:
609 break;
610 case HPWMI_SCREEN_ROTATION:
611 break;
612 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
613 break;
614 case HPWMI_COOLSENSE_SYSTEM_HOT:
615 break;
616 case HPWMI_PROXIMITY_SENSOR:
617 break;
618 case HPWMI_BACKLIT_KB_BRIGHTNESS:
619 break;
620 case HPWMI_PEAKSHIFT_PERIOD:
621 break;
622 case HPWMI_BATTERY_CHARGE_PERIOD:
623 break;
624 default:
625 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
626 break;
627 }
628}
629
630static int __init hp_wmi_input_setup(void)
631{
632 acpi_status status;
633 int err, val;
634
635 hp_wmi_input_dev = input_allocate_device();
636 if (!hp_wmi_input_dev)
637 return -ENOMEM;
638
639 hp_wmi_input_dev->name = "HP WMI hotkeys";
640 hp_wmi_input_dev->phys = "wmi/input0";
641 hp_wmi_input_dev->id.bustype = BUS_HOST;
642
643 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
644
645 /* Dock */
646 val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
647 if (!(val < 0)) {
648 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
649 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
650 }
651
652 /* Tablet mode */
653 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
654 if (!(val < 0)) {
655 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
656 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
657 }
658
659 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
660 if (err)
661 goto err_free_dev;
662
663 /* Set initial hardware state */
664 input_sync(hp_wmi_input_dev);
665
666 if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
667 hp_wmi_enable_hotkeys();
668
669 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
670 if (ACPI_FAILURE(status)) {
671 err = -EIO;
672 goto err_free_dev;
673 }
674
675 err = input_register_device(hp_wmi_input_dev);
676 if (err)
677 goto err_uninstall_notifier;
678
679 return 0;
680
681 err_uninstall_notifier:
682 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
683 err_free_dev:
684 input_free_device(hp_wmi_input_dev);
685 return err;
686}
687
688static void hp_wmi_input_destroy(void)
689{
690 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
691 input_unregister_device(hp_wmi_input_dev);
692}
693
694static void cleanup_sysfs(struct platform_device *device)
695{
696 device_remove_file(&device->dev, &dev_attr_display);
697 device_remove_file(&device->dev, &dev_attr_hddtemp);
698 device_remove_file(&device->dev, &dev_attr_als);
699 device_remove_file(&device->dev, &dev_attr_dock);
700 device_remove_file(&device->dev, &dev_attr_tablet);
701 device_remove_file(&device->dev, &dev_attr_postcode);
702}
703
704static int __init hp_wmi_rfkill_setup(struct platform_device *device)
705{
706 int err, wireless;
707
708 wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
709 if (wireless < 0)
710 return wireless;
711
712 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
713 sizeof(wireless), 0);
714 if (err)
715 return err;
716
717 if (wireless & 0x1) {
718 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
719 RFKILL_TYPE_WLAN,
720 &hp_wmi_rfkill_ops,
721 (void *) HPWMI_WIFI);
722 if (!wifi_rfkill)
723 return -ENOMEM;
724 rfkill_init_sw_state(wifi_rfkill,
725 hp_wmi_get_sw_state(HPWMI_WIFI));
726 rfkill_set_hw_state(wifi_rfkill,
727 hp_wmi_get_hw_state(HPWMI_WIFI));
728 err = rfkill_register(wifi_rfkill);
729 if (err)
730 goto register_wifi_error;
731 }
732
733 if (wireless & 0x2) {
734 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
735 RFKILL_TYPE_BLUETOOTH,
736 &hp_wmi_rfkill_ops,
737 (void *) HPWMI_BLUETOOTH);
738 if (!bluetooth_rfkill) {
739 err = -ENOMEM;
740 goto register_bluetooth_error;
741 }
742 rfkill_init_sw_state(bluetooth_rfkill,
743 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
744 rfkill_set_hw_state(bluetooth_rfkill,
745 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
746 err = rfkill_register(bluetooth_rfkill);
747 if (err)
748 goto register_bluetooth_error;
749 }
750
751 if (wireless & 0x4) {
752 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
753 RFKILL_TYPE_WWAN,
754 &hp_wmi_rfkill_ops,
755 (void *) HPWMI_WWAN);
756 if (!wwan_rfkill) {
757 err = -ENOMEM;
758 goto register_wwan_error;
759 }
760 rfkill_init_sw_state(wwan_rfkill,
761 hp_wmi_get_sw_state(HPWMI_WWAN));
762 rfkill_set_hw_state(wwan_rfkill,
763 hp_wmi_get_hw_state(HPWMI_WWAN));
764 err = rfkill_register(wwan_rfkill);
765 if (err)
766 goto register_wwan_error;
767 }
768
769 return 0;
770
771register_wwan_error:
772 rfkill_destroy(wwan_rfkill);
773 wwan_rfkill = NULL;
774 if (bluetooth_rfkill)
775 rfkill_unregister(bluetooth_rfkill);
776register_bluetooth_error:
777 rfkill_destroy(bluetooth_rfkill);
778 bluetooth_rfkill = NULL;
779 if (wifi_rfkill)
780 rfkill_unregister(wifi_rfkill);
781register_wifi_error:
782 rfkill_destroy(wifi_rfkill);
783 wifi_rfkill = NULL;
784 return err;
785}
786
787static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
788{
789 struct bios_rfkill2_state state;
790 int err, i;
791
792 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
793 0, sizeof(state));
794 if (err)
795 return err < 0 ? err : -EINVAL;
796
797 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
798 pr_warn("unable to parse 0x1b query output\n");
799 return -EINVAL;
800 }
801
802 for (i = 0; i < state.count; i++) {
803 struct rfkill *rfkill;
804 enum rfkill_type type;
805 char *name;
806 switch (state.device[i].radio_type) {
807 case HPWMI_WIFI:
808 type = RFKILL_TYPE_WLAN;
809 name = "hp-wifi";
810 break;
811 case HPWMI_BLUETOOTH:
812 type = RFKILL_TYPE_BLUETOOTH;
813 name = "hp-bluetooth";
814 break;
815 case HPWMI_WWAN:
816 type = RFKILL_TYPE_WWAN;
817 name = "hp-wwan";
818 break;
819 case HPWMI_GPS:
820 type = RFKILL_TYPE_GPS;
821 name = "hp-gps";
822 break;
823 default:
824 pr_warn("unknown device type 0x%x\n",
825 state.device[i].radio_type);
826 continue;
827 }
828
829 if (!state.device[i].vendor_id) {
830 pr_warn("zero device %d while %d reported\n",
831 i, state.count);
832 continue;
833 }
834
835 rfkill = rfkill_alloc(name, &device->dev, type,
836 &hp_wmi_rfkill2_ops, (void *)(long)i);
837 if (!rfkill) {
838 err = -ENOMEM;
839 goto fail;
840 }
841
842 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
843 rfkill2[rfkill2_count].num = i;
844 rfkill2[rfkill2_count].rfkill = rfkill;
845
846 rfkill_init_sw_state(rfkill,
847 IS_SWBLOCKED(state.device[i].power));
848 rfkill_set_hw_state(rfkill,
849 IS_HWBLOCKED(state.device[i].power));
850
851 if (!(state.device[i].power & HPWMI_POWER_BIOS))
852 pr_info("device %s blocked by BIOS\n", name);
853
854 err = rfkill_register(rfkill);
855 if (err) {
856 rfkill_destroy(rfkill);
857 goto fail;
858 }
859
860 rfkill2_count++;
861 }
862
863 return 0;
864fail:
865 for (; rfkill2_count > 0; rfkill2_count--) {
866 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
867 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
868 }
869 return err;
870}
871
872static int __init hp_wmi_bios_setup(struct platform_device *device)
873{
874 int err;
875
876 /* clear detected rfkill devices */
877 wifi_rfkill = NULL;
878 bluetooth_rfkill = NULL;
879 wwan_rfkill = NULL;
880 rfkill2_count = 0;
881
882 if (hp_wmi_rfkill_setup(device))
883 hp_wmi_rfkill2_setup(device);
884
885 err = device_create_file(&device->dev, &dev_attr_display);
886 if (err)
887 goto add_sysfs_error;
888 err = device_create_file(&device->dev, &dev_attr_hddtemp);
889 if (err)
890 goto add_sysfs_error;
891 err = device_create_file(&device->dev, &dev_attr_als);
892 if (err)
893 goto add_sysfs_error;
894 err = device_create_file(&device->dev, &dev_attr_dock);
895 if (err)
896 goto add_sysfs_error;
897 err = device_create_file(&device->dev, &dev_attr_tablet);
898 if (err)
899 goto add_sysfs_error;
900 err = device_create_file(&device->dev, &dev_attr_postcode);
901 if (err)
902 goto add_sysfs_error;
903 return 0;
904
905add_sysfs_error:
906 cleanup_sysfs(device);
907 return err;
908}
909
910static int __exit hp_wmi_bios_remove(struct platform_device *device)
911{
912 int i;
913 cleanup_sysfs(device);
914
915 for (i = 0; i < rfkill2_count; i++) {
916 rfkill_unregister(rfkill2[i].rfkill);
917 rfkill_destroy(rfkill2[i].rfkill);
918 }
919
920 if (wifi_rfkill) {
921 rfkill_unregister(wifi_rfkill);
922 rfkill_destroy(wifi_rfkill);
923 }
924 if (bluetooth_rfkill) {
925 rfkill_unregister(bluetooth_rfkill);
926 rfkill_destroy(bluetooth_rfkill);
927 }
928 if (wwan_rfkill) {
929 rfkill_unregister(wwan_rfkill);
930 rfkill_destroy(wwan_rfkill);
931 }
932
933 return 0;
934}
935
936static int hp_wmi_resume_handler(struct device *device)
937{
938 /*
939 * Hardware state may have changed while suspended, so trigger
940 * input events for the current state. As this is a switch,
941 * the input layer will only actually pass it on if the state
942 * changed.
943 */
944 if (hp_wmi_input_dev) {
945 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
946 input_report_switch(hp_wmi_input_dev, SW_DOCK,
947 hp_wmi_hw_state(HPWMI_DOCK_MASK));
948 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
949 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
950 hp_wmi_hw_state(HPWMI_TABLET_MASK));
951 input_sync(hp_wmi_input_dev);
952 }
953
954 if (rfkill2_count)
955 hp_wmi_rfkill2_refresh();
956
957 if (wifi_rfkill)
958 rfkill_set_states(wifi_rfkill,
959 hp_wmi_get_sw_state(HPWMI_WIFI),
960 hp_wmi_get_hw_state(HPWMI_WIFI));
961 if (bluetooth_rfkill)
962 rfkill_set_states(bluetooth_rfkill,
963 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
964 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
965 if (wwan_rfkill)
966 rfkill_set_states(wwan_rfkill,
967 hp_wmi_get_sw_state(HPWMI_WWAN),
968 hp_wmi_get_hw_state(HPWMI_WWAN));
969
970 return 0;
971}
972
973static const struct dev_pm_ops hp_wmi_pm_ops = {
974 .resume = hp_wmi_resume_handler,
975 .restore = hp_wmi_resume_handler,
976};
977
978static struct platform_driver hp_wmi_driver = {
979 .driver = {
980 .name = "hp-wmi",
981 .pm = &hp_wmi_pm_ops,
982 },
983 .remove = __exit_p(hp_wmi_bios_remove),
984};
985
986static int __init hp_wmi_init(void)
987{
988 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
989 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
990 int err;
991
992 if (!bios_capable && !event_capable)
993 return -ENODEV;
994
995 if (event_capable) {
996 err = hp_wmi_input_setup();
997 if (err)
998 return err;
999 }
1000
1001 if (bios_capable) {
1002 hp_wmi_platform_dev =
1003 platform_device_register_simple("hp-wmi", -1, NULL, 0);
1004 if (IS_ERR(hp_wmi_platform_dev)) {
1005 err = PTR_ERR(hp_wmi_platform_dev);
1006 goto err_destroy_input;
1007 }
1008
1009 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1010 if (err)
1011 goto err_unregister_device;
1012 }
1013
1014 return 0;
1015
1016err_unregister_device:
1017 platform_device_unregister(hp_wmi_platform_dev);
1018err_destroy_input:
1019 if (event_capable)
1020 hp_wmi_input_destroy();
1021
1022 return err;
1023}
1024module_init(hp_wmi_init);
1025
1026static void __exit hp_wmi_exit(void)
1027{
1028 if (wmi_has_guid(HPWMI_EVENT_GUID))
1029 hp_wmi_input_destroy();
1030
1031 if (hp_wmi_platform_dev) {
1032 platform_device_unregister(hp_wmi_platform_dev);
1033 platform_driver_unregister(&hp_wmi_driver);
1034 }
1035}
1036module_exit(hp_wmi_exit);