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cris/uaccess: fix sparse errors
[linux-2.6/btrfs-unstable.git] / drivers / platform / x86 / hp-wmi.c
blob0ab2b377a778aaf673815736f305b0c8edb5ff3a
1 /*
2 * HP WMI hotkeys
3 *
4 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
5 * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
6 *
7 * Portions based on wistron_btns.c:
8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/types.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/platform_device.h>
37 #include <linux/acpi.h>
38 #include <linux/rfkill.h>
39 #include <linux/string.h>
40
41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
43 MODULE_LICENSE("GPL");
44
45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
47
48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
50
51 #define HPWMI_DISPLAY_QUERY 0x1
52 #define HPWMI_HDDTEMP_QUERY 0x2
53 #define HPWMI_ALS_QUERY 0x3
54 #define HPWMI_HARDWARE_QUERY 0x4
55 #define HPWMI_WIRELESS_QUERY 0x5
56 #define HPWMI_BIOS_QUERY 0x9
57 #define HPWMI_HOTKEY_QUERY 0xc
58 #define HPWMI_FEATURE_QUERY 0xd
59 #define HPWMI_WIRELESS2_QUERY 0x1b
60 #define HPWMI_POSTCODEERROR_QUERY 0x2a
61
62 enum hp_wmi_radio {
63 HPWMI_WIFI = 0,
64 HPWMI_BLUETOOTH = 1,
65 HPWMI_WWAN = 2,
66 HPWMI_GPS = 3,
67 };
68
69 enum hp_wmi_event_ids {
70 HPWMI_DOCK_EVENT = 1,
71 HPWMI_PARK_HDD = 2,
72 HPWMI_SMART_ADAPTER = 3,
73 HPWMI_BEZEL_BUTTON = 4,
74 HPWMI_WIRELESS = 5,
75 HPWMI_CPU_BATTERY_THROTTLE = 6,
76 HPWMI_LOCK_SWITCH = 7,
77 HPWMI_LID_SWITCH = 8,
78 HPWMI_SCREEN_ROTATION = 9,
79 HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
80 HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
81 HPWMI_PROXIMITY_SENSOR = 0x0C,
82 HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
83 HPWMI_PEAKSHIFT_PERIOD = 0x0F,
84 HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
85 };
86
87 struct bios_args {
88 u32 signature;
89 u32 command;
90 u32 commandtype;
91 u32 datasize;
92 u32 data;
93 };
94
95 struct bios_return {
96 u32 sigpass;
97 u32 return_code;
98 };
99
100 enum hp_return_value {
101 HPWMI_RET_WRONG_SIGNATURE = 0x02,
102 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
103 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
104 HPWMI_RET_INVALID_PARAMETERS = 0x05,
105 };
106
107 enum hp_wireless2_bits {
108 HPWMI_POWER_STATE = 0x01,
109 HPWMI_POWER_SOFT = 0x02,
110 HPWMI_POWER_BIOS = 0x04,
111 HPWMI_POWER_HARD = 0x08,
112 };
113
114 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
115 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
116 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
117
118 struct bios_rfkill2_device_state {
119 u8 radio_type;
120 u8 bus_type;
121 u16 vendor_id;
122 u16 product_id;
123 u16 subsys_vendor_id;
124 u16 subsys_product_id;
125 u8 rfkill_id;
126 u8 power;
127 u8 unknown[4];
128 };
129
130 /* 7 devices fit into the 128 byte buffer */
131 #define HPWMI_MAX_RFKILL2_DEVICES 7
132
133 struct bios_rfkill2_state {
134 u8 unknown[7];
135 u8 count;
136 u8 pad[8];
137 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
138 };
139
140 static const struct key_entry hp_wmi_keymap[] = {
141 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
142 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
143 { KE_KEY, 0x20e6, { KEY_PROG1 } },
144 { KE_KEY, 0x20e8, { KEY_MEDIA } },
145 { KE_KEY, 0x2142, { KEY_MEDIA } },
146 { KE_KEY, 0x213b, { KEY_INFO } },
147 { KE_KEY, 0x2169, { KEY_DIRECTION } },
148 { KE_KEY, 0x216a, { KEY_SETUP } },
149 { KE_KEY, 0x231b, { KEY_HELP } },
150 { KE_END, 0 }
151 };
152
153 static struct input_dev *hp_wmi_input_dev;
154 static struct platform_device *hp_wmi_platform_dev;
155
156 static struct rfkill *wifi_rfkill;
157 static struct rfkill *bluetooth_rfkill;
158 static struct rfkill *wwan_rfkill;
159 static struct rfkill *gps_rfkill;
160
161 struct rfkill2_device {
162 u8 id;
163 int num;
164 struct rfkill *rfkill;
165 };
166
167 static int rfkill2_count;
168 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
169
170 /*
171 * hp_wmi_perform_query
172 *
173 * query: The commandtype -> What should be queried
174 * write: The command -> 0 read, 1 write, 3 ODM specific
175 * buffer: Buffer used as input and/or output
176 * insize: Size of input buffer
177 * outsize: Size of output buffer
178 *
179 * returns zero on success
180 * an HP WMI query specific error code (which is positive)
181 * -EINVAL if the query was not successful at all
182 * -EINVAL if the output buffer size exceeds buffersize
183 *
184 * Note: The buffersize must at least be the maximum of the input and output
185 * size. E.g. Battery info query (0x7) is defined to have 1 byte input
186 * and 128 byte output. The caller would do:
187 * buffer = kzalloc(128, GFP_KERNEL);
188 * ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
189 */
190 static int hp_wmi_perform_query(int query, int write, void *buffer,
191 int insize, int outsize)
192 {
193 struct bios_return *bios_return;
194 int actual_outsize;
195 union acpi_object *obj;
196 struct bios_args args = {
197 .signature = 0x55434553,
198 .command = write ? 0x2 : 0x1,
199 .commandtype = query,
200 .datasize = insize,
201 .data = 0,
202 };
203 struct acpi_buffer input = { sizeof(struct bios_args), &args };
204 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
205 u32 rc;
206
207 if (WARN_ON(insize > sizeof(args.data)))
208 return -EINVAL;
209 memcpy(&args.data, buffer, insize);
210
211 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
212
213 obj = output.pointer;
214
215 if (!obj)
216 return -EINVAL;
217 else if (obj->type != ACPI_TYPE_BUFFER) {
218 kfree(obj);
219 return -EINVAL;
220 }
221
222 bios_return = (struct bios_return *)obj->buffer.pointer;
223 rc = bios_return->return_code;
224
225 if (rc) {
226 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
227 pr_warn("query 0x%x returned error 0x%x\n", query, rc);
228 kfree(obj);
229 return rc;
230 }
231
232 if (!outsize) {
233 /* ignore output data */
234 kfree(obj);
235 return 0;
236 }
237
238 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
239 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
240 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
241 kfree(obj);
242 return 0;
243 }
244
245 static int hp_wmi_display_state(void)
246 {
247 int state = 0;
248 int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
249 sizeof(state), sizeof(state));
250 if (ret)
251 return -EINVAL;
252 return state;
253 }
254
255 static int hp_wmi_hddtemp_state(void)
256 {
257 int state = 0;
258 int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
259 sizeof(state), sizeof(state));
260 if (ret)
261 return -EINVAL;
262 return state;
263 }
264
265 static int hp_wmi_als_state(void)
266 {
267 int state = 0;
268 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
269 sizeof(state), sizeof(state));
270 if (ret)
271 return -EINVAL;
272 return state;
273 }
274
275 static int hp_wmi_dock_state(void)
276 {
277 int state = 0;
278 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
279 sizeof(state), sizeof(state));
280
281 if (ret)
282 return -EINVAL;
283
284 return state & 0x1;
285 }
286
287 static int hp_wmi_tablet_state(void)
288 {
289 int state = 0;
290 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
291 sizeof(state), sizeof(state));
292 if (ret)
293 return ret;
294
295 return (state & 0x4) ? 1 : 0;
296 }
297
298 static int __init hp_wmi_bios_2009_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 ret;
305
306 return (state & 0x10) ? 1 : 0;
307 }
308
309 static int hp_wmi_enable_hotkeys(void)
310 {
311 int ret;
312 int query = 0x6e;
313
314 ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &query, sizeof(query),
315 0);
316
317 if (ret)
318 return -EINVAL;
319 return 0;
320 }
321
322 static int hp_wmi_set_block(void *data, bool blocked)
323 {
324 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
325 int query = BIT(r + 8) | ((!blocked) << r);
326 int ret;
327
328 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
329 &query, sizeof(query), 0);
330 if (ret)
331 return -EINVAL;
332 return 0;
333 }
334
335 static const struct rfkill_ops hp_wmi_rfkill_ops = {
336 .set_block = hp_wmi_set_block,
337 };
338
339 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
340 {
341 int wireless = 0;
342 int mask;
343 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
344 &wireless, sizeof(wireless),
345 sizeof(wireless));
346 /* TBD: Pass error */
347
348 mask = 0x200 << (r * 8);
349
350 if (wireless & mask)
351 return false;
352 else
353 return true;
354 }
355
356 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
357 {
358 int wireless = 0;
359 int mask;
360 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
361 &wireless, sizeof(wireless),
362 sizeof(wireless));
363 /* TBD: Pass error */
364
365 mask = 0x800 << (r * 8);
366
367 if (wireless & mask)
368 return false;
369 else
370 return true;
371 }
372
373 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
374 {
375 int rfkill_id = (int)(long)data;
376 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
377
378 if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
379 buffer, sizeof(buffer), 0))
380 return -EINVAL;
381 return 0;
382 }
383
384 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
385 .set_block = hp_wmi_rfkill2_set_block,
386 };
387
388 static int hp_wmi_rfkill2_refresh(void)
389 {
390 int err, i;
391 struct bios_rfkill2_state state;
392
393 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
394 0, sizeof(state));
395 if (err)
396 return err;
397
398 for (i = 0; i < rfkill2_count; i++) {
399 int num = rfkill2[i].num;
400 struct bios_rfkill2_device_state *devstate;
401 devstate = &state.device[num];
402
403 if (num >= state.count ||
404 devstate->rfkill_id != rfkill2[i].id) {
405 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
406 continue;
407 }
408
409 rfkill_set_states(rfkill2[i].rfkill,
410 IS_SWBLOCKED(devstate->power),
411 IS_HWBLOCKED(devstate->power));
412 }
413
414 return 0;
415 }
416
417 static int hp_wmi_post_code_state(void)
418 {
419 int state = 0;
420 int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
421 sizeof(state), sizeof(state));
422 if (ret)
423 return -EINVAL;
424 return state;
425 }
426
427 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
428 char *buf)
429 {
430 int value = hp_wmi_display_state();
431 if (value < 0)
432 return -EINVAL;
433 return sprintf(buf, "%d\n", value);
434 }
435
436 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
437 char *buf)
438 {
439 int value = hp_wmi_hddtemp_state();
440 if (value < 0)
441 return -EINVAL;
442 return sprintf(buf, "%d\n", value);
443 }
444
445 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
446 char *buf)
447 {
448 int value = hp_wmi_als_state();
449 if (value < 0)
450 return -EINVAL;
451 return sprintf(buf, "%d\n", value);
452 }
453
454 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
455 char *buf)
456 {
457 int value = hp_wmi_dock_state();
458 if (value < 0)
459 return -EINVAL;
460 return sprintf(buf, "%d\n", value);
461 }
462
463 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
464 char *buf)
465 {
466 int value = hp_wmi_tablet_state();
467 if (value < 0)
468 return -EINVAL;
469 return sprintf(buf, "%d\n", value);
470 }
471
472 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
473 char *buf)
474 {
475 /* Get the POST error code of previous boot failure. */
476 int value = hp_wmi_post_code_state();
477 if (value < 0)
478 return -EINVAL;
479 return sprintf(buf, "0x%x\n", value);
480 }
481
482 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
483 const char *buf, size_t count)
484 {
485 u32 tmp = simple_strtoul(buf, NULL, 10);
486 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
487 sizeof(tmp), sizeof(tmp));
488 if (ret)
489 return -EINVAL;
490
491 return count;
492 }
493
494 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
495 const char *buf, size_t count)
496 {
497 int ret;
498 u32 tmp;
499 long unsigned int tmp2;
500
501 ret = kstrtoul(buf, 10, &tmp2);
502 if (ret || tmp2 != 1)
503 return -EINVAL;
504
505 /* Clear the POST error code. It is kept until until cleared. */
506 tmp = (u32) tmp2;
507 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
508 sizeof(tmp), sizeof(tmp));
509 if (ret)
510 return -EINVAL;
511
512 return count;
513 }
514
515 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
516 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
517 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
518 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
519 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
520 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
521
522 static void hp_wmi_notify(u32 value, void *context)
523 {
524 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
525 union acpi_object *obj;
526 u32 event_id, event_data;
527 int key_code = 0, ret;
528 u32 *location;
529 acpi_status status;
530
531 status = wmi_get_event_data(value, &response);
532 if (status != AE_OK) {
533 pr_info("bad event status 0x%x\n", status);
534 return;
535 }
536
537 obj = (union acpi_object *)response.pointer;
538
539 if (!obj)
540 return;
541 if (obj->type != ACPI_TYPE_BUFFER) {
542 pr_info("Unknown response received %d\n", obj->type);
543 kfree(obj);
544 return;
545 }
546
547 /*
548 * Depending on ACPI version the concatenation of id and event data
549 * inside _WED function will result in a 8 or 16 byte buffer.
550 */
551 location = (u32 *)obj->buffer.pointer;
552 if (obj->buffer.length == 8) {
553 event_id = *location;
554 event_data = *(location + 1);
555 } else if (obj->buffer.length == 16) {
556 event_id = *location;
557 event_data = *(location + 2);
558 } else {
559 pr_info("Unknown buffer length %d\n", obj->buffer.length);
560 kfree(obj);
561 return;
562 }
563 kfree(obj);
564
565 switch (event_id) {
566 case HPWMI_DOCK_EVENT:
567 input_report_switch(hp_wmi_input_dev, SW_DOCK,
568 hp_wmi_dock_state());
569 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
570 hp_wmi_tablet_state());
571 input_sync(hp_wmi_input_dev);
572 break;
573 case HPWMI_PARK_HDD:
574 break;
575 case HPWMI_SMART_ADAPTER:
576 break;
577 case HPWMI_BEZEL_BUTTON:
578 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
579 &key_code,
580 sizeof(key_code),
581 sizeof(key_code));
582 if (ret)
583 break;
584
585 if (!sparse_keymap_report_event(hp_wmi_input_dev,
586 key_code, 1, true))
587 pr_info("Unknown key code - 0x%x\n", key_code);
588 break;
589 case HPWMI_WIRELESS:
590 if (rfkill2_count) {
591 hp_wmi_rfkill2_refresh();
592 break;
593 }
594
595 if (wifi_rfkill)
596 rfkill_set_states(wifi_rfkill,
597 hp_wmi_get_sw_state(HPWMI_WIFI),
598 hp_wmi_get_hw_state(HPWMI_WIFI));
599 if (bluetooth_rfkill)
600 rfkill_set_states(bluetooth_rfkill,
601 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
602 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
603 if (wwan_rfkill)
604 rfkill_set_states(wwan_rfkill,
605 hp_wmi_get_sw_state(HPWMI_WWAN),
606 hp_wmi_get_hw_state(HPWMI_WWAN));
607 if (gps_rfkill)
608 rfkill_set_states(gps_rfkill,
609 hp_wmi_get_sw_state(HPWMI_GPS),
610 hp_wmi_get_hw_state(HPWMI_GPS));
611 break;
612 case HPWMI_CPU_BATTERY_THROTTLE:
613 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
614 break;
615 case HPWMI_LOCK_SWITCH:
616 break;
617 case HPWMI_LID_SWITCH:
618 break;
619 case HPWMI_SCREEN_ROTATION:
620 break;
621 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
622 break;
623 case HPWMI_COOLSENSE_SYSTEM_HOT:
624 break;
625 case HPWMI_PROXIMITY_SENSOR:
626 break;
627 case HPWMI_BACKLIT_KB_BRIGHTNESS:
628 break;
629 case HPWMI_PEAKSHIFT_PERIOD:
630 break;
631 case HPWMI_BATTERY_CHARGE_PERIOD:
632 break;
633 default:
634 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
635 break;
636 }
637 }
638
639 static int __init hp_wmi_input_setup(void)
640 {
641 acpi_status status;
642 int err;
643
644 hp_wmi_input_dev = input_allocate_device();
645 if (!hp_wmi_input_dev)
646 return -ENOMEM;
647
648 hp_wmi_input_dev->name = "HP WMI hotkeys";
649 hp_wmi_input_dev->phys = "wmi/input0";
650 hp_wmi_input_dev->id.bustype = BUS_HOST;
651
652 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
653 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
654 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
655
656 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
657 if (err)
658 goto err_free_dev;
659
660 /* Set initial hardware state */
661 input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
662 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
663 hp_wmi_tablet_state());
664 input_sync(hp_wmi_input_dev);
665
666 if (hp_wmi_bios_2009_later() == 4)
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_keymap;
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_keymap:
684 sparse_keymap_free(hp_wmi_input_dev);
685 err_free_dev:
686 input_free_device(hp_wmi_input_dev);
687 return err;
688 }
689
690 static void hp_wmi_input_destroy(void)
691 {
692 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
693 sparse_keymap_free(hp_wmi_input_dev);
694 input_unregister_device(hp_wmi_input_dev);
695 }
696
697 static void cleanup_sysfs(struct platform_device *device)
698 {
699 device_remove_file(&device->dev, &dev_attr_display);
700 device_remove_file(&device->dev, &dev_attr_hddtemp);
701 device_remove_file(&device->dev, &dev_attr_als);
702 device_remove_file(&device->dev, &dev_attr_dock);
703 device_remove_file(&device->dev, &dev_attr_tablet);
704 device_remove_file(&device->dev, &dev_attr_postcode);
705 }
706
707 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
708 {
709 int err;
710 int wireless = 0;
711
712 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
713 sizeof(wireless), sizeof(wireless));
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_wifi_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_bluetooth_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 if (wireless & 0x8) {
770 gps_rfkill = rfkill_alloc("hp-gps", &device->dev,
771 RFKILL_TYPE_GPS,
772 &hp_wmi_rfkill_ops,
773 (void *) HPWMI_GPS);
774 if (!gps_rfkill) {
775 err = -ENOMEM;
776 goto register_wwan_error;
777 }
778 rfkill_init_sw_state(gps_rfkill,
779 hp_wmi_get_sw_state(HPWMI_GPS));
780 rfkill_set_hw_state(gps_rfkill,
781 hp_wmi_get_hw_state(HPWMI_GPS));
782 err = rfkill_register(gps_rfkill);
783 if (err)
784 goto register_gps_error;
785 }
786
787 return 0;
788 register_gps_error:
789 rfkill_destroy(gps_rfkill);
790 gps_rfkill = NULL;
791 if (bluetooth_rfkill)
792 rfkill_unregister(bluetooth_rfkill);
793 register_wwan_error:
794 rfkill_destroy(wwan_rfkill);
795 wwan_rfkill = NULL;
796 if (gps_rfkill)
797 rfkill_unregister(gps_rfkill);
798 register_bluetooth_error:
799 rfkill_destroy(bluetooth_rfkill);
800 bluetooth_rfkill = NULL;
801 if (wifi_rfkill)
802 rfkill_unregister(wifi_rfkill);
803 register_wifi_error:
804 rfkill_destroy(wifi_rfkill);
805 wifi_rfkill = NULL;
806 return err;
807 }
808
809 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
810 {
811 int err, i;
812 struct bios_rfkill2_state state;
813 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
814 0, sizeof(state));
815 if (err)
816 return err;
817
818 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
819 pr_warn("unable to parse 0x1b query output\n");
820 return -EINVAL;
821 }
822
823 for (i = 0; i < state.count; i++) {
824 struct rfkill *rfkill;
825 enum rfkill_type type;
826 char *name;
827 switch (state.device[i].radio_type) {
828 case HPWMI_WIFI:
829 type = RFKILL_TYPE_WLAN;
830 name = "hp-wifi";
831 break;
832 case HPWMI_BLUETOOTH:
833 type = RFKILL_TYPE_BLUETOOTH;
834 name = "hp-bluetooth";
835 break;
836 case HPWMI_WWAN:
837 type = RFKILL_TYPE_WWAN;
838 name = "hp-wwan";
839 break;
840 case HPWMI_GPS:
841 type = RFKILL_TYPE_GPS;
842 name = "hp-gps";
843 break;
844 default:
845 pr_warn("unknown device type 0x%x\n",
846 state.device[i].radio_type);
847 continue;
848 }
849
850 if (!state.device[i].vendor_id) {
851 pr_warn("zero device %d while %d reported\n",
852 i, state.count);
853 continue;
854 }
855
856 rfkill = rfkill_alloc(name, &device->dev, type,
857 &hp_wmi_rfkill2_ops, (void *)(long)i);
858 if (!rfkill) {
859 err = -ENOMEM;
860 goto fail;
861 }
862
863 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
864 rfkill2[rfkill2_count].num = i;
865 rfkill2[rfkill2_count].rfkill = rfkill;
866
867 rfkill_init_sw_state(rfkill,
868 IS_SWBLOCKED(state.device[i].power));
869 rfkill_set_hw_state(rfkill,
870 IS_HWBLOCKED(state.device[i].power));
871
872 if (!(state.device[i].power & HPWMI_POWER_BIOS))
873 pr_info("device %s blocked by BIOS\n", name);
874
875 err = rfkill_register(rfkill);
876 if (err) {
877 rfkill_destroy(rfkill);
878 goto fail;
879 }
880
881 rfkill2_count++;
882 }
883
884 return 0;
885 fail:
886 for (; rfkill2_count > 0; rfkill2_count--) {
887 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
888 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
889 }
890 return err;
891 }
892
893 static int __init hp_wmi_bios_setup(struct platform_device *device)
894 {
895 int err;
896
897 /* clear detected rfkill devices */
898 wifi_rfkill = NULL;
899 bluetooth_rfkill = NULL;
900 wwan_rfkill = NULL;
901 gps_rfkill = NULL;
902 rfkill2_count = 0;
903
904 if (hp_wmi_bios_2009_later() || hp_wmi_rfkill_setup(device))
905 hp_wmi_rfkill2_setup(device);
906
907 err = device_create_file(&device->dev, &dev_attr_display);
908 if (err)
909 goto add_sysfs_error;
910 err = device_create_file(&device->dev, &dev_attr_hddtemp);
911 if (err)
912 goto add_sysfs_error;
913 err = device_create_file(&device->dev, &dev_attr_als);
914 if (err)
915 goto add_sysfs_error;
916 err = device_create_file(&device->dev, &dev_attr_dock);
917 if (err)
918 goto add_sysfs_error;
919 err = device_create_file(&device->dev, &dev_attr_tablet);
920 if (err)
921 goto add_sysfs_error;
922 err = device_create_file(&device->dev, &dev_attr_postcode);
923 if (err)
924 goto add_sysfs_error;
925 return 0;
926
927 add_sysfs_error:
928 cleanup_sysfs(device);
929 return err;
930 }
931
932 static int __exit hp_wmi_bios_remove(struct platform_device *device)
933 {
934 int i;
935 cleanup_sysfs(device);
936
937 for (i = 0; i < rfkill2_count; i++) {
938 rfkill_unregister(rfkill2[i].rfkill);
939 rfkill_destroy(rfkill2[i].rfkill);
940 }
941
942 if (wifi_rfkill) {
943 rfkill_unregister(wifi_rfkill);
944 rfkill_destroy(wifi_rfkill);
945 }
946 if (bluetooth_rfkill) {
947 rfkill_unregister(bluetooth_rfkill);
948 rfkill_destroy(bluetooth_rfkill);
949 }
950 if (wwan_rfkill) {
951 rfkill_unregister(wwan_rfkill);
952 rfkill_destroy(wwan_rfkill);
953 }
954 if (gps_rfkill) {
955 rfkill_unregister(gps_rfkill);
956 rfkill_destroy(gps_rfkill);
957 }
958
959 return 0;
960 }
961
962 static int hp_wmi_resume_handler(struct device *device)
963 {
964 /*
965 * Hardware state may have changed while suspended, so trigger
966 * input events for the current state. As this is a switch,
967 * the input layer will only actually pass it on if the state
968 * changed.
969 */
970 if (hp_wmi_input_dev) {
971 input_report_switch(hp_wmi_input_dev, SW_DOCK,
972 hp_wmi_dock_state());
973 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
974 hp_wmi_tablet_state());
975 input_sync(hp_wmi_input_dev);
976 }
977
978 if (rfkill2_count)
979 hp_wmi_rfkill2_refresh();
980
981 if (wifi_rfkill)
982 rfkill_set_states(wifi_rfkill,
983 hp_wmi_get_sw_state(HPWMI_WIFI),
984 hp_wmi_get_hw_state(HPWMI_WIFI));
985 if (bluetooth_rfkill)
986 rfkill_set_states(bluetooth_rfkill,
987 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
988 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
989 if (wwan_rfkill)
990 rfkill_set_states(wwan_rfkill,
991 hp_wmi_get_sw_state(HPWMI_WWAN),
992 hp_wmi_get_hw_state(HPWMI_WWAN));
993 if (gps_rfkill)
994 rfkill_set_states(gps_rfkill,
995 hp_wmi_get_sw_state(HPWMI_GPS),
996 hp_wmi_get_hw_state(HPWMI_GPS));
997
998 return 0;
999 }
1000
1001 static const struct dev_pm_ops hp_wmi_pm_ops = {
1002 .resume = hp_wmi_resume_handler,
1003 .restore = hp_wmi_resume_handler,
1004 };
1005
1006 static struct platform_driver hp_wmi_driver = {
1007 .driver = {
1008 .name = "hp-wmi",
1009 .pm = &hp_wmi_pm_ops,
1010 },
1011 .remove = __exit_p(hp_wmi_bios_remove),
1012 };
1013
1014 static int __init hp_wmi_init(void)
1015 {
1016 int err;
1017 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1018 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1019
1020 if (!bios_capable && !event_capable)
1021 return -ENODEV;
1022
1023 if (event_capable) {
1024 err = hp_wmi_input_setup();
1025 if (err)
1026 return err;
1027 }
1028
1029 if (bios_capable) {
1030 hp_wmi_platform_dev =
1031 platform_device_register_simple("hp-wmi", -1, NULL, 0);
1032 if (IS_ERR(hp_wmi_platform_dev)) {
1033 err = PTR_ERR(hp_wmi_platform_dev);
1034 goto err_destroy_input;
1035 }
1036
1037 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1038 if (err)
1039 goto err_unregister_device;
1040 }
1041
1042 return 0;
1043
1044 err_unregister_device:
1045 platform_device_unregister(hp_wmi_platform_dev);
1046 err_destroy_input:
1047 if (event_capable)
1048 hp_wmi_input_destroy();
1049
1050 return err;
1051 }
1052 module_init(hp_wmi_init);
1053
1054 static void __exit hp_wmi_exit(void)
1055 {
1056 if (wmi_has_guid(HPWMI_EVENT_GUID))
1057 hp_wmi_input_destroy();
1058
1059 if (hp_wmi_platform_dev) {
1060 platform_device_unregister(hp_wmi_platform_dev);
1061 platform_driver_unregister(&hp_wmi_driver);
1062 }
1063 }
1064 module_exit(hp_wmi_exit);
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