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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// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * HP WMI hotkeys
4 *
5 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
6 * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
7 *
8 * Portions based on wistron_btns.c:
9 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
10 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
11 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
12 */
13
14#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19#include <linux/slab.h>
20#include <linux/types.h>
21#include <linux/input.h>
22#include <linux/input/sparse-keymap.h>
23#include <linux/platform_device.h>
24#include <linux/acpi.h>
25#include <linux/rfkill.h>
26#include <linux/string.h>
27
28MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
29MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
30MODULE_LICENSE("GPL");
31
32MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
33MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
34
35#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
36#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
37
38enum hp_wmi_radio {
39 HPWMI_WIFI = 0x0,
40 HPWMI_BLUETOOTH = 0x1,
41 HPWMI_WWAN = 0x2,
42 HPWMI_GPS = 0x3,
43};
44
45enum hp_wmi_event_ids {
46 HPWMI_DOCK_EVENT = 0x01,
47 HPWMI_PARK_HDD = 0x02,
48 HPWMI_SMART_ADAPTER = 0x03,
49 HPWMI_BEZEL_BUTTON = 0x04,
50 HPWMI_WIRELESS = 0x05,
51 HPWMI_CPU_BATTERY_THROTTLE = 0x06,
52 HPWMI_LOCK_SWITCH = 0x07,
53 HPWMI_LID_SWITCH = 0x08,
54 HPWMI_SCREEN_ROTATION = 0x09,
55 HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
56 HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
57 HPWMI_PROXIMITY_SENSOR = 0x0C,
58 HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
59 HPWMI_PEAKSHIFT_PERIOD = 0x0F,
60 HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
61};
62
63struct bios_args {
64 u32 signature;
65 u32 command;
66 u32 commandtype;
67 u32 datasize;
68 u32 data;
69};
70
71enum hp_wmi_commandtype {
72 HPWMI_DISPLAY_QUERY = 0x01,
73 HPWMI_HDDTEMP_QUERY = 0x02,
74 HPWMI_ALS_QUERY = 0x03,
75 HPWMI_HARDWARE_QUERY = 0x04,
76 HPWMI_WIRELESS_QUERY = 0x05,
77 HPWMI_BATTERY_QUERY = 0x07,
78 HPWMI_BIOS_QUERY = 0x09,
79 HPWMI_FEATURE_QUERY = 0x0b,
80 HPWMI_HOTKEY_QUERY = 0x0c,
81 HPWMI_FEATURE2_QUERY = 0x0d,
82 HPWMI_WIRELESS2_QUERY = 0x1b,
83 HPWMI_POSTCODEERROR_QUERY = 0x2a,
84};
85
86enum hp_wmi_command {
87 HPWMI_READ = 0x01,
88 HPWMI_WRITE = 0x02,
89 HPWMI_ODM = 0x03,
90};
91
92enum hp_wmi_hardware_mask {
93 HPWMI_DOCK_MASK = 0x01,
94 HPWMI_TABLET_MASK = 0x04,
95};
96
97struct bios_return {
98 u32 sigpass;
99 u32 return_code;
100};
101
102enum hp_return_value {
103 HPWMI_RET_WRONG_SIGNATURE = 0x02,
104 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
105 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
106 HPWMI_RET_INVALID_PARAMETERS = 0x05,
107};
108
109enum hp_wireless2_bits {
110 HPWMI_POWER_STATE = 0x01,
111 HPWMI_POWER_SOFT = 0x02,
112 HPWMI_POWER_BIOS = 0x04,
113 HPWMI_POWER_HARD = 0x08,
114};
115
116#define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
117 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
118#define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
119
120struct bios_rfkill2_device_state {
121 u8 radio_type;
122 u8 bus_type;
123 u16 vendor_id;
124 u16 product_id;
125 u16 subsys_vendor_id;
126 u16 subsys_product_id;
127 u8 rfkill_id;
128 u8 power;
129 u8 unknown[4];
130};
131
132/* 7 devices fit into the 128 byte buffer */
133#define HPWMI_MAX_RFKILL2_DEVICES 7
134
135struct bios_rfkill2_state {
136 u8 unknown[7];
137 u8 count;
138 u8 pad[8];
139 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
140};
141
142static const struct key_entry hp_wmi_keymap[] = {
143 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
144 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
145 { KE_KEY, 0x20e6, { KEY_PROG1 } },
146 { KE_KEY, 0x20e8, { KEY_MEDIA } },
147 { KE_KEY, 0x2142, { KEY_MEDIA } },
148 { KE_KEY, 0x213b, { KEY_INFO } },
149 { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
150 { KE_KEY, 0x216a, { KEY_SETUP } },
151 { KE_KEY, 0x231b, { KEY_HELP } },
152 { KE_END, 0 }
153};
154
155static struct input_dev *hp_wmi_input_dev;
156static struct platform_device *hp_wmi_platform_dev;
157
158static struct rfkill *wifi_rfkill;
159static struct rfkill *bluetooth_rfkill;
160static struct rfkill *wwan_rfkill;
161
162struct rfkill2_device {
163 u8 id;
164 int num;
165 struct rfkill *rfkill;
166};
167
168static int rfkill2_count;
169static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
170
171/* map output size to the corresponding WMI method id */
172static inline int encode_outsize_for_pvsz(int outsize)
173{
174 if (outsize > 4096)
175 return -EINVAL;
176 if (outsize > 1024)
177 return 5;
178 if (outsize > 128)
179 return 4;
180 if (outsize > 4)
181 return 3;
182 if (outsize > 0)
183 return 2;
184 return 1;
185}
186
187/*
188 * hp_wmi_perform_query
189 *
190 * query: The commandtype (enum hp_wmi_commandtype)
191 * write: The command (enum hp_wmi_command)
192 * buffer: Buffer used as input and/or output
193 * insize: Size of input buffer
194 * outsize: Size of output buffer
195 *
196 * returns zero on success
197 * an HP WMI query specific error code (which is positive)
198 * -EINVAL if the query was not successful at all
199 * -EINVAL if the output buffer size exceeds buffersize
200 *
201 * Note: The buffersize must at least be the maximum of the input and output
202 * size. E.g. Battery info query is defined to have 1 byte input
203 * and 128 byte output. The caller would do:
204 * buffer = kzalloc(128, GFP_KERNEL);
205 * ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
206 */
207static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
208 void *buffer, int insize, int outsize)
209{
210 int mid;
211 struct bios_return *bios_return;
212 int actual_outsize;
213 union acpi_object *obj;
214 struct bios_args args = {
215 .signature = 0x55434553,
216 .command = command,
217 .commandtype = query,
218 .datasize = insize,
219 .data = 0,
220 };
221 struct acpi_buffer input = { sizeof(struct bios_args), &args };
222 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
223 int ret = 0;
224
225 mid = encode_outsize_for_pvsz(outsize);
226 if (WARN_ON(mid < 0))
227 return mid;
228
229 if (WARN_ON(insize > sizeof(args.data)))
230 return -EINVAL;
231 memcpy(&args.data, buffer, insize);
232
233 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
234
235 obj = output.pointer;
236
237 if (!obj)
238 return -EINVAL;
239
240 if (obj->type != ACPI_TYPE_BUFFER) {
241 ret = -EINVAL;
242 goto out_free;
243 }
244
245 bios_return = (struct bios_return *)obj->buffer.pointer;
246 ret = bios_return->return_code;
247
248 if (ret) {
249 if (ret != HPWMI_RET_UNKNOWN_CMDTYPE)
250 pr_warn("query 0x%x returned error 0x%x\n", query, ret);
251 goto out_free;
252 }
253
254 /* Ignore output data of zero size */
255 if (!outsize)
256 goto out_free;
257
258 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
259 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
260 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
261
262out_free:
263 kfree(obj);
264 return ret;
265}
266
267static int hp_wmi_read_int(int query)
268{
269 int val = 0, ret;
270
271 ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
272 sizeof(val), sizeof(val));
273
274 if (ret)
275 return ret < 0 ? ret : -EINVAL;
276
277 return val;
278}
279
280static int hp_wmi_hw_state(int mask)
281{
282 int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
283
284 if (state < 0)
285 return state;
286
287 return !!(state & mask);
288}
289
290static int __init hp_wmi_bios_2008_later(void)
291{
292 int state = 0;
293 int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
294 sizeof(state), sizeof(state));
295 if (!ret)
296 return 1;
297
298 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
299}
300
301static int __init hp_wmi_bios_2009_later(void)
302{
303 int state = 0;
304 int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
305 sizeof(state), sizeof(state));
306 if (!ret)
307 return 1;
308
309 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
310}
311
312static int __init hp_wmi_enable_hotkeys(void)
313{
314 int value = 0x6e;
315 int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
316 sizeof(value), 0);
317
318 return ret <= 0 ? ret : -EINVAL;
319}
320
321static int hp_wmi_set_block(void *data, bool blocked)
322{
323 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
324 int query = BIT(r + 8) | ((!blocked) << r);
325 int ret;
326
327 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
328 &query, sizeof(query), 0);
329
330 return ret <= 0 ? ret : -EINVAL;
331}
332
333static const struct rfkill_ops hp_wmi_rfkill_ops = {
334 .set_block = hp_wmi_set_block,
335};
336
337static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
338{
339 int mask = 0x200 << (r * 8);
340
341 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
342
343 /* TBD: Pass error */
344 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
345
346 return !(wireless & mask);
347}
348
349static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
350{
351 int mask = 0x800 << (r * 8);
352
353 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
354
355 /* TBD: Pass error */
356 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
357
358 return !(wireless & mask);
359}
360
361static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
362{
363 int rfkill_id = (int)(long)data;
364 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
365 int ret;
366
367 ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
368 buffer, sizeof(buffer), 0);
369
370 return ret <= 0 ? ret : -EINVAL;
371}
372
373static const struct rfkill_ops hp_wmi_rfkill2_ops = {
374 .set_block = hp_wmi_rfkill2_set_block,
375};
376
377static int hp_wmi_rfkill2_refresh(void)
378{
379 struct bios_rfkill2_state state;
380 int err, i;
381
382 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
383 0, sizeof(state));
384 if (err)
385 return err;
386
387 for (i = 0; i < rfkill2_count; i++) {
388 int num = rfkill2[i].num;
389 struct bios_rfkill2_device_state *devstate;
390 devstate = &state.device[num];
391
392 if (num >= state.count ||
393 devstate->rfkill_id != rfkill2[i].id) {
394 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
395 continue;
396 }
397
398 rfkill_set_states(rfkill2[i].rfkill,
399 IS_SWBLOCKED(devstate->power),
400 IS_HWBLOCKED(devstate->power));
401 }
402
403 return 0;
404}
405
406static ssize_t display_show(struct device *dev, struct device_attribute *attr,
407 char *buf)
408{
409 int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
410 if (value < 0)
411 return value;
412 return sprintf(buf, "%d\n", value);
413}
414
415static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
416 char *buf)
417{
418 int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
419 if (value < 0)
420 return value;
421 return sprintf(buf, "%d\n", value);
422}
423
424static ssize_t als_show(struct device *dev, struct device_attribute *attr,
425 char *buf)
426{
427 int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
428 if (value < 0)
429 return value;
430 return sprintf(buf, "%d\n", value);
431}
432
433static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
434 char *buf)
435{
436 int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
437 if (value < 0)
438 return value;
439 return sprintf(buf, "%d\n", value);
440}
441
442static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
443 char *buf)
444{
445 int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
446 if (value < 0)
447 return value;
448 return sprintf(buf, "%d\n", value);
449}
450
451static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
452 char *buf)
453{
454 /* Get the POST error code of previous boot failure. */
455 int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
456 if (value < 0)
457 return value;
458 return sprintf(buf, "0x%x\n", value);
459}
460
461static ssize_t als_store(struct device *dev, struct device_attribute *attr,
462 const char *buf, size_t count)
463{
464 u32 tmp = simple_strtoul(buf, NULL, 10);
465 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
466 sizeof(tmp), sizeof(tmp));
467 if (ret)
468 return ret < 0 ? ret : -EINVAL;
469
470 return count;
471}
472
473static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
474 const char *buf, size_t count)
475{
476 long unsigned int tmp2;
477 int ret;
478 u32 tmp;
479
480 ret = kstrtoul(buf, 10, &tmp2);
481 if (!ret && tmp2 != 1)
482 ret = -EINVAL;
483 if (ret)
484 goto out;
485
486 /* Clear the POST error code. It is kept until until cleared. */
487 tmp = (u32) tmp2;
488 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
489 sizeof(tmp), sizeof(tmp));
490
491out:
492 if (ret)
493 return ret < 0 ? ret : -EINVAL;
494
495 return count;
496}
497
498static DEVICE_ATTR_RO(display);
499static DEVICE_ATTR_RO(hddtemp);
500static DEVICE_ATTR_RW(als);
501static DEVICE_ATTR_RO(dock);
502static DEVICE_ATTR_RO(tablet);
503static DEVICE_ATTR_RW(postcode);
504
505static struct attribute *hp_wmi_attrs[] = {
506 &dev_attr_display.attr,
507 &dev_attr_hddtemp.attr,
508 &dev_attr_als.attr,
509 &dev_attr_dock.attr,
510 &dev_attr_tablet.attr,
511 &dev_attr_postcode.attr,
512 NULL,
513};
514ATTRIBUTE_GROUPS(hp_wmi);
515
516static void hp_wmi_notify(u32 value, void *context)
517{
518 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
519 u32 event_id, event_data;
520 union acpi_object *obj;
521 acpi_status status;
522 u32 *location;
523 int key_code;
524
525 status = wmi_get_event_data(value, &response);
526 if (status != AE_OK) {
527 pr_info("bad event status 0x%x\n", status);
528 return;
529 }
530
531 obj = (union acpi_object *)response.pointer;
532
533 if (!obj)
534 return;
535 if (obj->type != ACPI_TYPE_BUFFER) {
536 pr_info("Unknown response received %d\n", obj->type);
537 kfree(obj);
538 return;
539 }
540
541 /*
542 * Depending on ACPI version the concatenation of id and event data
543 * inside _WED function will result in a 8 or 16 byte buffer.
544 */
545 location = (u32 *)obj->buffer.pointer;
546 if (obj->buffer.length == 8) {
547 event_id = *location;
548 event_data = *(location + 1);
549 } else if (obj->buffer.length == 16) {
550 event_id = *location;
551 event_data = *(location + 2);
552 } else {
553 pr_info("Unknown buffer length %d\n", obj->buffer.length);
554 kfree(obj);
555 return;
556 }
557 kfree(obj);
558
559 switch (event_id) {
560 case HPWMI_DOCK_EVENT:
561 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
562 input_report_switch(hp_wmi_input_dev, SW_DOCK,
563 hp_wmi_hw_state(HPWMI_DOCK_MASK));
564 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
565 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
566 hp_wmi_hw_state(HPWMI_TABLET_MASK));
567 input_sync(hp_wmi_input_dev);
568 break;
569 case HPWMI_PARK_HDD:
570 break;
571 case HPWMI_SMART_ADAPTER:
572 break;
573 case HPWMI_BEZEL_BUTTON:
574 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
575 if (key_code < 0)
576 break;
577
578 if (!sparse_keymap_report_event(hp_wmi_input_dev,
579 key_code, 1, true))
580 pr_info("Unknown key code - 0x%x\n", key_code);
581 break;
582 case HPWMI_WIRELESS:
583 if (rfkill2_count) {
584 hp_wmi_rfkill2_refresh();
585 break;
586 }
587
588 if (wifi_rfkill)
589 rfkill_set_states(wifi_rfkill,
590 hp_wmi_get_sw_state(HPWMI_WIFI),
591 hp_wmi_get_hw_state(HPWMI_WIFI));
592 if (bluetooth_rfkill)
593 rfkill_set_states(bluetooth_rfkill,
594 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
595 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
596 if (wwan_rfkill)
597 rfkill_set_states(wwan_rfkill,
598 hp_wmi_get_sw_state(HPWMI_WWAN),
599 hp_wmi_get_hw_state(HPWMI_WWAN));
600 break;
601 case HPWMI_CPU_BATTERY_THROTTLE:
602 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
603 break;
604 case HPWMI_LOCK_SWITCH:
605 break;
606 case HPWMI_LID_SWITCH:
607 break;
608 case HPWMI_SCREEN_ROTATION:
609 break;
610 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
611 break;
612 case HPWMI_COOLSENSE_SYSTEM_HOT:
613 break;
614 case HPWMI_PROXIMITY_SENSOR:
615 break;
616 case HPWMI_BACKLIT_KB_BRIGHTNESS:
617 break;
618 case HPWMI_PEAKSHIFT_PERIOD:
619 break;
620 case HPWMI_BATTERY_CHARGE_PERIOD:
621 break;
622 default:
623 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
624 break;
625 }
626}
627
628static int __init hp_wmi_input_setup(void)
629{
630 acpi_status status;
631 int err, val;
632
633 hp_wmi_input_dev = input_allocate_device();
634 if (!hp_wmi_input_dev)
635 return -ENOMEM;
636
637 hp_wmi_input_dev->name = "HP WMI hotkeys";
638 hp_wmi_input_dev->phys = "wmi/input0";
639 hp_wmi_input_dev->id.bustype = BUS_HOST;
640
641 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
642
643 /* Dock */
644 val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
645 if (!(val < 0)) {
646 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
647 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
648 }
649
650 /* Tablet mode */
651 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
652 if (!(val < 0)) {
653 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
654 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
655 }
656
657 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
658 if (err)
659 goto err_free_dev;
660
661 /* Set initial hardware state */
662 input_sync(hp_wmi_input_dev);
663
664 if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
665 hp_wmi_enable_hotkeys();
666
667 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
668 if (ACPI_FAILURE(status)) {
669 err = -EIO;
670 goto err_free_dev;
671 }
672
673 err = input_register_device(hp_wmi_input_dev);
674 if (err)
675 goto err_uninstall_notifier;
676
677 return 0;
678
679 err_uninstall_notifier:
680 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
681 err_free_dev:
682 input_free_device(hp_wmi_input_dev);
683 return err;
684}
685
686static void hp_wmi_input_destroy(void)
687{
688 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
689 input_unregister_device(hp_wmi_input_dev);
690}
691
692static int __init hp_wmi_rfkill_setup(struct platform_device *device)
693{
694 int err, wireless;
695
696 wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
697 if (wireless < 0)
698 return wireless;
699
700 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
701 sizeof(wireless), 0);
702 if (err)
703 return err;
704
705 if (wireless & 0x1) {
706 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
707 RFKILL_TYPE_WLAN,
708 &hp_wmi_rfkill_ops,
709 (void *) HPWMI_WIFI);
710 if (!wifi_rfkill)
711 return -ENOMEM;
712 rfkill_init_sw_state(wifi_rfkill,
713 hp_wmi_get_sw_state(HPWMI_WIFI));
714 rfkill_set_hw_state(wifi_rfkill,
715 hp_wmi_get_hw_state(HPWMI_WIFI));
716 err = rfkill_register(wifi_rfkill);
717 if (err)
718 goto register_wifi_error;
719 }
720
721 if (wireless & 0x2) {
722 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
723 RFKILL_TYPE_BLUETOOTH,
724 &hp_wmi_rfkill_ops,
725 (void *) HPWMI_BLUETOOTH);
726 if (!bluetooth_rfkill) {
727 err = -ENOMEM;
728 goto register_bluetooth_error;
729 }
730 rfkill_init_sw_state(bluetooth_rfkill,
731 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
732 rfkill_set_hw_state(bluetooth_rfkill,
733 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
734 err = rfkill_register(bluetooth_rfkill);
735 if (err)
736 goto register_bluetooth_error;
737 }
738
739 if (wireless & 0x4) {
740 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
741 RFKILL_TYPE_WWAN,
742 &hp_wmi_rfkill_ops,
743 (void *) HPWMI_WWAN);
744 if (!wwan_rfkill) {
745 err = -ENOMEM;
746 goto register_wwan_error;
747 }
748 rfkill_init_sw_state(wwan_rfkill,
749 hp_wmi_get_sw_state(HPWMI_WWAN));
750 rfkill_set_hw_state(wwan_rfkill,
751 hp_wmi_get_hw_state(HPWMI_WWAN));
752 err = rfkill_register(wwan_rfkill);
753 if (err)
754 goto register_wwan_error;
755 }
756
757 return 0;
758
759register_wwan_error:
760 rfkill_destroy(wwan_rfkill);
761 wwan_rfkill = NULL;
762 if (bluetooth_rfkill)
763 rfkill_unregister(bluetooth_rfkill);
764register_bluetooth_error:
765 rfkill_destroy(bluetooth_rfkill);
766 bluetooth_rfkill = NULL;
767 if (wifi_rfkill)
768 rfkill_unregister(wifi_rfkill);
769register_wifi_error:
770 rfkill_destroy(wifi_rfkill);
771 wifi_rfkill = NULL;
772 return err;
773}
774
775static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
776{
777 struct bios_rfkill2_state state;
778 int err, i;
779
780 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
781 0, sizeof(state));
782 if (err)
783 return err < 0 ? err : -EINVAL;
784
785 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
786 pr_warn("unable to parse 0x1b query output\n");
787 return -EINVAL;
788 }
789
790 for (i = 0; i < state.count; i++) {
791 struct rfkill *rfkill;
792 enum rfkill_type type;
793 char *name;
794 switch (state.device[i].radio_type) {
795 case HPWMI_WIFI:
796 type = RFKILL_TYPE_WLAN;
797 name = "hp-wifi";
798 break;
799 case HPWMI_BLUETOOTH:
800 type = RFKILL_TYPE_BLUETOOTH;
801 name = "hp-bluetooth";
802 break;
803 case HPWMI_WWAN:
804 type = RFKILL_TYPE_WWAN;
805 name = "hp-wwan";
806 break;
807 case HPWMI_GPS:
808 type = RFKILL_TYPE_GPS;
809 name = "hp-gps";
810 break;
811 default:
812 pr_warn("unknown device type 0x%x\n",
813 state.device[i].radio_type);
814 continue;
815 }
816
817 if (!state.device[i].vendor_id) {
818 pr_warn("zero device %d while %d reported\n",
819 i, state.count);
820 continue;
821 }
822
823 rfkill = rfkill_alloc(name, &device->dev, type,
824 &hp_wmi_rfkill2_ops, (void *)(long)i);
825 if (!rfkill) {
826 err = -ENOMEM;
827 goto fail;
828 }
829
830 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
831 rfkill2[rfkill2_count].num = i;
832 rfkill2[rfkill2_count].rfkill = rfkill;
833
834 rfkill_init_sw_state(rfkill,
835 IS_SWBLOCKED(state.device[i].power));
836 rfkill_set_hw_state(rfkill,
837 IS_HWBLOCKED(state.device[i].power));
838
839 if (!(state.device[i].power & HPWMI_POWER_BIOS))
840 pr_info("device %s blocked by BIOS\n", name);
841
842 err = rfkill_register(rfkill);
843 if (err) {
844 rfkill_destroy(rfkill);
845 goto fail;
846 }
847
848 rfkill2_count++;
849 }
850
851 return 0;
852fail:
853 for (; rfkill2_count > 0; rfkill2_count--) {
854 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
855 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
856 }
857 return err;
858}
859
860static int __init hp_wmi_bios_setup(struct platform_device *device)
861{
862 /* clear detected rfkill devices */
863 wifi_rfkill = NULL;
864 bluetooth_rfkill = NULL;
865 wwan_rfkill = NULL;
866 rfkill2_count = 0;
867
868 if (hp_wmi_rfkill_setup(device))
869 hp_wmi_rfkill2_setup(device);
870
871 return 0;
872}
873
874static int __exit hp_wmi_bios_remove(struct platform_device *device)
875{
876 int i;
877
878 for (i = 0; i < rfkill2_count; i++) {
879 rfkill_unregister(rfkill2[i].rfkill);
880 rfkill_destroy(rfkill2[i].rfkill);
881 }
882
883 if (wifi_rfkill) {
884 rfkill_unregister(wifi_rfkill);
885 rfkill_destroy(wifi_rfkill);
886 }
887 if (bluetooth_rfkill) {
888 rfkill_unregister(bluetooth_rfkill);
889 rfkill_destroy(bluetooth_rfkill);
890 }
891 if (wwan_rfkill) {
892 rfkill_unregister(wwan_rfkill);
893 rfkill_destroy(wwan_rfkill);
894 }
895
896 return 0;
897}
898
899static int hp_wmi_resume_handler(struct device *device)
900{
901 /*
902 * Hardware state may have changed while suspended, so trigger
903 * input events for the current state. As this is a switch,
904 * the input layer will only actually pass it on if the state
905 * changed.
906 */
907 if (hp_wmi_input_dev) {
908 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
909 input_report_switch(hp_wmi_input_dev, SW_DOCK,
910 hp_wmi_hw_state(HPWMI_DOCK_MASK));
911 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
912 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
913 hp_wmi_hw_state(HPWMI_TABLET_MASK));
914 input_sync(hp_wmi_input_dev);
915 }
916
917 if (rfkill2_count)
918 hp_wmi_rfkill2_refresh();
919
920 if (wifi_rfkill)
921 rfkill_set_states(wifi_rfkill,
922 hp_wmi_get_sw_state(HPWMI_WIFI),
923 hp_wmi_get_hw_state(HPWMI_WIFI));
924 if (bluetooth_rfkill)
925 rfkill_set_states(bluetooth_rfkill,
926 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
927 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
928 if (wwan_rfkill)
929 rfkill_set_states(wwan_rfkill,
930 hp_wmi_get_sw_state(HPWMI_WWAN),
931 hp_wmi_get_hw_state(HPWMI_WWAN));
932
933 return 0;
934}
935
936static const struct dev_pm_ops hp_wmi_pm_ops = {
937 .resume = hp_wmi_resume_handler,
938 .restore = hp_wmi_resume_handler,
939};
940
941static struct platform_driver hp_wmi_driver = {
942 .driver = {
943 .name = "hp-wmi",
944 .pm = &hp_wmi_pm_ops,
945 .dev_groups = hp_wmi_groups,
946 },
947 .remove = __exit_p(hp_wmi_bios_remove),
948};
949
950static int __init hp_wmi_init(void)
951{
952 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
953 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
954 int err;
955
956 if (!bios_capable && !event_capable)
957 return -ENODEV;
958
959 if (event_capable) {
960 err = hp_wmi_input_setup();
961 if (err)
962 return err;
963 }
964
965 if (bios_capable) {
966 hp_wmi_platform_dev =
967 platform_device_register_simple("hp-wmi", -1, NULL, 0);
968 if (IS_ERR(hp_wmi_platform_dev)) {
969 err = PTR_ERR(hp_wmi_platform_dev);
970 goto err_destroy_input;
971 }
972
973 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
974 if (err)
975 goto err_unregister_device;
976 }
977
978 return 0;
979
980err_unregister_device:
981 platform_device_unregister(hp_wmi_platform_dev);
982err_destroy_input:
983 if (event_capable)
984 hp_wmi_input_destroy();
985
986 return err;
987}
988module_init(hp_wmi_init);
989
990static void __exit hp_wmi_exit(void)
991{
992 if (wmi_has_guid(HPWMI_EVENT_GUID))
993 hp_wmi_input_destroy();
994
995 if (hp_wmi_platform_dev) {
996 platform_device_unregister(hp_wmi_platform_dev);
997 platform_driver_unregister(&hp_wmi_driver);
998 }
999}
1000module_exit(hp_wmi_exit);