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Merge branch 'rcu/next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck...
[deliverable/linux.git] / drivers / platform / x86 / hp-wmi.c
1 /*
2 * HP WMI hotkeys
3 *
4 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
5 * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
6 *
7 * Portions based on wistron_btns.c:
8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/slab.h>
33 #include <linux/types.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/platform_device.h>
37 #include <linux/acpi.h>
38 #include <linux/rfkill.h>
39 #include <linux/string.h>
40
41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
43 MODULE_LICENSE("GPL");
44
45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
47
48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
50
51 #define HPWMI_DISPLAY_QUERY 0x1
52 #define HPWMI_HDDTEMP_QUERY 0x2
53 #define HPWMI_ALS_QUERY 0x3
54 #define HPWMI_HARDWARE_QUERY 0x4
55 #define HPWMI_WIRELESS_QUERY 0x5
56 #define HPWMI_HOTKEY_QUERY 0xc
57 #define HPWMI_WIRELESS2_QUERY 0x1b
58
59 enum hp_wmi_radio {
60 HPWMI_WIFI = 0,
61 HPWMI_BLUETOOTH = 1,
62 HPWMI_WWAN = 2,
63 };
64
65 enum hp_wmi_event_ids {
66 HPWMI_DOCK_EVENT = 1,
67 HPWMI_PARK_HDD = 2,
68 HPWMI_SMART_ADAPTER = 3,
69 HPWMI_BEZEL_BUTTON = 4,
70 HPWMI_WIRELESS = 5,
71 HPWMI_CPU_BATTERY_THROTTLE = 6,
72 HPWMI_LOCK_SWITCH = 7,
73 };
74
75 static int hp_wmi_bios_setup(struct platform_device *device);
76 static int __exit hp_wmi_bios_remove(struct platform_device *device);
77 static int hp_wmi_resume_handler(struct device *device);
78
79 struct bios_args {
80 u32 signature;
81 u32 command;
82 u32 commandtype;
83 u32 datasize;
84 u32 data;
85 };
86
87 struct bios_return {
88 u32 sigpass;
89 u32 return_code;
90 };
91
92 enum hp_return_value {
93 HPWMI_RET_WRONG_SIGNATURE = 0x02,
94 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
95 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
96 HPWMI_RET_INVALID_PARAMETERS = 0x05,
97 };
98
99 enum hp_wireless2_bits {
100 HPWMI_POWER_STATE = 0x01,
101 HPWMI_POWER_SOFT = 0x02,
102 HPWMI_POWER_BIOS = 0x04,
103 HPWMI_POWER_HARD = 0x08,
104 };
105
106 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
107 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
108 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
109
110 struct bios_rfkill2_device_state {
111 u8 radio_type;
112 u8 bus_type;
113 u16 vendor_id;
114 u16 product_id;
115 u16 subsys_vendor_id;
116 u16 subsys_product_id;
117 u8 rfkill_id;
118 u8 power;
119 u8 unknown[4];
120 };
121
122 /* 7 devices fit into the 128 byte buffer */
123 #define HPWMI_MAX_RFKILL2_DEVICES 7
124
125 struct bios_rfkill2_state {
126 u8 unknown[7];
127 u8 count;
128 u8 pad[8];
129 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
130 };
131
132 static const struct key_entry hp_wmi_keymap[] = {
133 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
134 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
135 { KE_KEY, 0x20e6, { KEY_PROG1 } },
136 { KE_KEY, 0x20e8, { KEY_MEDIA } },
137 { KE_KEY, 0x2142, { KEY_MEDIA } },
138 { KE_KEY, 0x213b, { KEY_INFO } },
139 { KE_KEY, 0x2169, { KEY_DIRECTION } },
140 { KE_KEY, 0x231b, { KEY_HELP } },
141 { KE_END, 0 }
142 };
143
144 static struct input_dev *hp_wmi_input_dev;
145 static struct platform_device *hp_wmi_platform_dev;
146
147 static struct rfkill *wifi_rfkill;
148 static struct rfkill *bluetooth_rfkill;
149 static struct rfkill *wwan_rfkill;
150
151 struct rfkill2_device {
152 u8 id;
153 int num;
154 struct rfkill *rfkill;
155 };
156
157 static int rfkill2_count;
158 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
159
160 static const struct dev_pm_ops hp_wmi_pm_ops = {
161 .resume = hp_wmi_resume_handler,
162 .restore = hp_wmi_resume_handler,
163 };
164
165 static struct platform_driver hp_wmi_driver = {
166 .driver = {
167 .name = "hp-wmi",
168 .owner = THIS_MODULE,
169 .pm = &hp_wmi_pm_ops,
170 },
171 .probe = hp_wmi_bios_setup,
172 .remove = hp_wmi_bios_remove,
173 };
174
175 /*
176 * hp_wmi_perform_query
177 *
178 * query: The commandtype -> What should be queried
179 * write: The command -> 0 read, 1 write, 3 ODM specific
180 * buffer: Buffer used as input and/or output
181 * insize: Size of input buffer
182 * outsize: Size of output buffer
183 *
184 * returns zero on success
185 * an HP WMI query specific error code (which is positive)
186 * -EINVAL if the query was not successful at all
187 * -EINVAL if the output buffer size exceeds buffersize
188 *
189 * Note: The buffersize must at least be the maximum of the input and output
190 * size. E.g. Battery info query (0x7) is defined to have 1 byte input
191 * and 128 byte output. The caller would do:
192 * buffer = kzalloc(128, GFP_KERNEL);
193 * ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
194 */
195 static int hp_wmi_perform_query(int query, int write, void *buffer,
196 int insize, int outsize)
197 {
198 struct bios_return *bios_return;
199 int actual_outsize;
200 union acpi_object *obj;
201 struct bios_args args = {
202 .signature = 0x55434553,
203 .command = write ? 0x2 : 0x1,
204 .commandtype = query,
205 .datasize = insize,
206 .data = 0,
207 };
208 struct acpi_buffer input = { sizeof(struct bios_args), &args };
209 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
210 u32 rc;
211
212 if (WARN_ON(insize > sizeof(args.data)))
213 return -EINVAL;
214 memcpy(&args.data, buffer, insize);
215
216 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
217
218 obj = output.pointer;
219
220 if (!obj)
221 return -EINVAL;
222 else if (obj->type != ACPI_TYPE_BUFFER) {
223 kfree(obj);
224 return -EINVAL;
225 }
226
227 bios_return = (struct bios_return *)obj->buffer.pointer;
228 rc = bios_return->return_code;
229
230 if (rc) {
231 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
232 pr_warn("query 0x%x returned error 0x%x\n", query, rc);
233 kfree(obj);
234 return rc;
235 }
236
237 if (!outsize) {
238 /* ignore output data */
239 kfree(obj);
240 return 0;
241 }
242
243 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
244 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
245 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
246 kfree(obj);
247 return 0;
248 }
249
250 static int hp_wmi_display_state(void)
251 {
252 int state = 0;
253 int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
254 sizeof(state), sizeof(state));
255 if (ret)
256 return -EINVAL;
257 return state;
258 }
259
260 static int hp_wmi_hddtemp_state(void)
261 {
262 int state = 0;
263 int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
264 sizeof(state), sizeof(state));
265 if (ret)
266 return -EINVAL;
267 return state;
268 }
269
270 static int hp_wmi_als_state(void)
271 {
272 int state = 0;
273 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
274 sizeof(state), sizeof(state));
275 if (ret)
276 return -EINVAL;
277 return state;
278 }
279
280 static int hp_wmi_dock_state(void)
281 {
282 int state = 0;
283 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
284 sizeof(state), sizeof(state));
285
286 if (ret)
287 return -EINVAL;
288
289 return state & 0x1;
290 }
291
292 static int hp_wmi_tablet_state(void)
293 {
294 int state = 0;
295 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
296 sizeof(state), sizeof(state));
297 if (ret)
298 return ret;
299
300 return (state & 0x4) ? 1 : 0;
301 }
302
303 static int hp_wmi_set_block(void *data, bool blocked)
304 {
305 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
306 int query = BIT(r + 8) | ((!blocked) << r);
307 int ret;
308
309 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
310 &query, sizeof(query), 0);
311 if (ret)
312 return -EINVAL;
313 return 0;
314 }
315
316 static const struct rfkill_ops hp_wmi_rfkill_ops = {
317 .set_block = hp_wmi_set_block,
318 };
319
320 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
321 {
322 int wireless = 0;
323 int mask;
324 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
325 &wireless, sizeof(wireless),
326 sizeof(wireless));
327 /* TBD: Pass error */
328
329 mask = 0x200 << (r * 8);
330
331 if (wireless & mask)
332 return false;
333 else
334 return true;
335 }
336
337 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
338 {
339 int wireless = 0;
340 int mask;
341 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
342 &wireless, sizeof(wireless),
343 sizeof(wireless));
344 /* TBD: Pass error */
345
346 mask = 0x800 << (r * 8);
347
348 if (wireless & mask)
349 return false;
350 else
351 return true;
352 }
353
354 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
355 {
356 int rfkill_id = (int)(long)data;
357 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
358
359 if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
360 buffer, sizeof(buffer), 0))
361 return -EINVAL;
362 return 0;
363 }
364
365 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
366 .set_block = hp_wmi_rfkill2_set_block,
367 };
368
369 static int hp_wmi_rfkill2_refresh(void)
370 {
371 int err, i;
372 struct bios_rfkill2_state state;
373
374 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
375 0, sizeof(state));
376 if (err)
377 return err;
378
379 for (i = 0; i < rfkill2_count; i++) {
380 int num = rfkill2[i].num;
381 struct bios_rfkill2_device_state *devstate;
382 devstate = &state.device[num];
383
384 if (num >= state.count ||
385 devstate->rfkill_id != rfkill2[i].id) {
386 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
387 continue;
388 }
389
390 rfkill_set_states(rfkill2[i].rfkill,
391 IS_SWBLOCKED(devstate->power),
392 IS_HWBLOCKED(devstate->power));
393 }
394
395 return 0;
396 }
397
398 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
399 char *buf)
400 {
401 int value = hp_wmi_display_state();
402 if (value < 0)
403 return -EINVAL;
404 return sprintf(buf, "%d\n", value);
405 }
406
407 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
408 char *buf)
409 {
410 int value = hp_wmi_hddtemp_state();
411 if (value < 0)
412 return -EINVAL;
413 return sprintf(buf, "%d\n", value);
414 }
415
416 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
417 char *buf)
418 {
419 int value = hp_wmi_als_state();
420 if (value < 0)
421 return -EINVAL;
422 return sprintf(buf, "%d\n", value);
423 }
424
425 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
426 char *buf)
427 {
428 int value = hp_wmi_dock_state();
429 if (value < 0)
430 return -EINVAL;
431 return sprintf(buf, "%d\n", value);
432 }
433
434 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
435 char *buf)
436 {
437 int value = hp_wmi_tablet_state();
438 if (value < 0)
439 return -EINVAL;
440 return sprintf(buf, "%d\n", value);
441 }
442
443 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
444 const char *buf, size_t count)
445 {
446 u32 tmp = simple_strtoul(buf, NULL, 10);
447 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
448 sizeof(tmp), sizeof(tmp));
449 if (ret)
450 return -EINVAL;
451
452 return count;
453 }
454
455 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
456 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
457 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
458 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
459 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
460
461 static void hp_wmi_notify(u32 value, void *context)
462 {
463 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
464 union acpi_object *obj;
465 u32 event_id, event_data;
466 int key_code = 0, ret;
467 u32 *location;
468 acpi_status status;
469
470 status = wmi_get_event_data(value, &response);
471 if (status != AE_OK) {
472 pr_info("bad event status 0x%x\n", status);
473 return;
474 }
475
476 obj = (union acpi_object *)response.pointer;
477
478 if (!obj)
479 return;
480 if (obj->type != ACPI_TYPE_BUFFER) {
481 pr_info("Unknown response received %d\n", obj->type);
482 kfree(obj);
483 return;
484 }
485
486 /*
487 * Depending on ACPI version the concatenation of id and event data
488 * inside _WED function will result in a 8 or 16 byte buffer.
489 */
490 location = (u32 *)obj->buffer.pointer;
491 if (obj->buffer.length == 8) {
492 event_id = *location;
493 event_data = *(location + 1);
494 } else if (obj->buffer.length == 16) {
495 event_id = *location;
496 event_data = *(location + 2);
497 } else {
498 pr_info("Unknown buffer length %d\n", obj->buffer.length);
499 kfree(obj);
500 return;
501 }
502 kfree(obj);
503
504 switch (event_id) {
505 case HPWMI_DOCK_EVENT:
506 input_report_switch(hp_wmi_input_dev, SW_DOCK,
507 hp_wmi_dock_state());
508 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
509 hp_wmi_tablet_state());
510 input_sync(hp_wmi_input_dev);
511 break;
512 case HPWMI_PARK_HDD:
513 break;
514 case HPWMI_SMART_ADAPTER:
515 break;
516 case HPWMI_BEZEL_BUTTON:
517 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
518 &key_code,
519 sizeof(key_code),
520 sizeof(key_code));
521 if (ret)
522 break;
523
524 if (!sparse_keymap_report_event(hp_wmi_input_dev,
525 key_code, 1, true))
526 pr_info("Unknown key code - 0x%x\n", key_code);
527 break;
528 case HPWMI_WIRELESS:
529 if (rfkill2_count) {
530 hp_wmi_rfkill2_refresh();
531 break;
532 }
533
534 if (wifi_rfkill)
535 rfkill_set_states(wifi_rfkill,
536 hp_wmi_get_sw_state(HPWMI_WIFI),
537 hp_wmi_get_hw_state(HPWMI_WIFI));
538 if (bluetooth_rfkill)
539 rfkill_set_states(bluetooth_rfkill,
540 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
541 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
542 if (wwan_rfkill)
543 rfkill_set_states(wwan_rfkill,
544 hp_wmi_get_sw_state(HPWMI_WWAN),
545 hp_wmi_get_hw_state(HPWMI_WWAN));
546 break;
547 case HPWMI_CPU_BATTERY_THROTTLE:
548 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
549 break;
550 case HPWMI_LOCK_SWITCH:
551 break;
552 default:
553 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
554 break;
555 }
556 }
557
558 static int __init hp_wmi_input_setup(void)
559 {
560 acpi_status status;
561 int err;
562
563 hp_wmi_input_dev = input_allocate_device();
564 if (!hp_wmi_input_dev)
565 return -ENOMEM;
566
567 hp_wmi_input_dev->name = "HP WMI hotkeys";
568 hp_wmi_input_dev->phys = "wmi/input0";
569 hp_wmi_input_dev->id.bustype = BUS_HOST;
570
571 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
572 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
573 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
574
575 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
576 if (err)
577 goto err_free_dev;
578
579 /* Set initial hardware state */
580 input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
581 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
582 hp_wmi_tablet_state());
583 input_sync(hp_wmi_input_dev);
584
585 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
586 if (ACPI_FAILURE(status)) {
587 err = -EIO;
588 goto err_free_keymap;
589 }
590
591 err = input_register_device(hp_wmi_input_dev);
592 if (err)
593 goto err_uninstall_notifier;
594
595 return 0;
596
597 err_uninstall_notifier:
598 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
599 err_free_keymap:
600 sparse_keymap_free(hp_wmi_input_dev);
601 err_free_dev:
602 input_free_device(hp_wmi_input_dev);
603 return err;
604 }
605
606 static void hp_wmi_input_destroy(void)
607 {
608 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
609 sparse_keymap_free(hp_wmi_input_dev);
610 input_unregister_device(hp_wmi_input_dev);
611 }
612
613 static void cleanup_sysfs(struct platform_device *device)
614 {
615 device_remove_file(&device->dev, &dev_attr_display);
616 device_remove_file(&device->dev, &dev_attr_hddtemp);
617 device_remove_file(&device->dev, &dev_attr_als);
618 device_remove_file(&device->dev, &dev_attr_dock);
619 device_remove_file(&device->dev, &dev_attr_tablet);
620 }
621
622 static int hp_wmi_rfkill_setup(struct platform_device *device)
623 {
624 int err;
625 int wireless = 0;
626
627 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
628 sizeof(wireless), sizeof(wireless));
629 if (err)
630 return err;
631
632 if (wireless & 0x1) {
633 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
634 RFKILL_TYPE_WLAN,
635 &hp_wmi_rfkill_ops,
636 (void *) HPWMI_WIFI);
637 if (!wifi_rfkill)
638 return -ENOMEM;
639 rfkill_init_sw_state(wifi_rfkill,
640 hp_wmi_get_sw_state(HPWMI_WIFI));
641 rfkill_set_hw_state(wifi_rfkill,
642 hp_wmi_get_hw_state(HPWMI_WIFI));
643 err = rfkill_register(wifi_rfkill);
644 if (err)
645 goto register_wifi_error;
646 }
647
648 if (wireless & 0x2) {
649 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
650 RFKILL_TYPE_BLUETOOTH,
651 &hp_wmi_rfkill_ops,
652 (void *) HPWMI_BLUETOOTH);
653 if (!bluetooth_rfkill) {
654 err = -ENOMEM;
655 goto register_wifi_error;
656 }
657 rfkill_init_sw_state(bluetooth_rfkill,
658 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
659 rfkill_set_hw_state(bluetooth_rfkill,
660 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
661 err = rfkill_register(bluetooth_rfkill);
662 if (err)
663 goto register_bluetooth_error;
664 }
665
666 if (wireless & 0x4) {
667 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
668 RFKILL_TYPE_WWAN,
669 &hp_wmi_rfkill_ops,
670 (void *) HPWMI_WWAN);
671 if (!wwan_rfkill) {
672 err = -ENOMEM;
673 goto register_bluetooth_error;
674 }
675 rfkill_init_sw_state(wwan_rfkill,
676 hp_wmi_get_sw_state(HPWMI_WWAN));
677 rfkill_set_hw_state(wwan_rfkill,
678 hp_wmi_get_hw_state(HPWMI_WWAN));
679 err = rfkill_register(wwan_rfkill);
680 if (err)
681 goto register_wwan_err;
682 }
683
684 return 0;
685 register_wwan_err:
686 rfkill_destroy(wwan_rfkill);
687 wwan_rfkill = NULL;
688 if (bluetooth_rfkill)
689 rfkill_unregister(bluetooth_rfkill);
690 register_bluetooth_error:
691 rfkill_destroy(bluetooth_rfkill);
692 bluetooth_rfkill = NULL;
693 if (wifi_rfkill)
694 rfkill_unregister(wifi_rfkill);
695 register_wifi_error:
696 rfkill_destroy(wifi_rfkill);
697 wifi_rfkill = NULL;
698 return err;
699 }
700
701 static int hp_wmi_rfkill2_setup(struct platform_device *device)
702 {
703 int err, i;
704 struct bios_rfkill2_state state;
705 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
706 0, sizeof(state));
707 if (err)
708 return err;
709
710 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
711 pr_warn("unable to parse 0x1b query output\n");
712 return -EINVAL;
713 }
714
715 for (i = 0; i < state.count; i++) {
716 struct rfkill *rfkill;
717 enum rfkill_type type;
718 char *name;
719 switch (state.device[i].radio_type) {
720 case HPWMI_WIFI:
721 type = RFKILL_TYPE_WLAN;
722 name = "hp-wifi";
723 break;
724 case HPWMI_BLUETOOTH:
725 type = RFKILL_TYPE_BLUETOOTH;
726 name = "hp-bluetooth";
727 break;
728 case HPWMI_WWAN:
729 type = RFKILL_TYPE_WWAN;
730 name = "hp-wwan";
731 break;
732 default:
733 pr_warn("unknown device type 0x%x\n",
734 state.device[i].radio_type);
735 continue;
736 }
737
738 if (!state.device[i].vendor_id) {
739 pr_warn("zero device %d while %d reported\n",
740 i, state.count);
741 continue;
742 }
743
744 rfkill = rfkill_alloc(name, &device->dev, type,
745 &hp_wmi_rfkill2_ops, (void *)(long)i);
746 if (!rfkill) {
747 err = -ENOMEM;
748 goto fail;
749 }
750
751 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
752 rfkill2[rfkill2_count].num = i;
753 rfkill2[rfkill2_count].rfkill = rfkill;
754
755 rfkill_init_sw_state(rfkill,
756 IS_SWBLOCKED(state.device[i].power));
757 rfkill_set_hw_state(rfkill,
758 IS_HWBLOCKED(state.device[i].power));
759
760 if (!(state.device[i].power & HPWMI_POWER_BIOS))
761 pr_info("device %s blocked by BIOS\n", name);
762
763 err = rfkill_register(rfkill);
764 if (err) {
765 rfkill_destroy(rfkill);
766 goto fail;
767 }
768
769 rfkill2_count++;
770 }
771
772 return 0;
773 fail:
774 for (; rfkill2_count > 0; rfkill2_count--) {
775 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
776 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
777 }
778 return err;
779 }
780
781 static int hp_wmi_bios_setup(struct platform_device *device)
782 {
783 int err;
784
785 /* clear detected rfkill devices */
786 wifi_rfkill = NULL;
787 bluetooth_rfkill = NULL;
788 wwan_rfkill = NULL;
789 rfkill2_count = 0;
790
791 if (hp_wmi_rfkill_setup(device))
792 hp_wmi_rfkill2_setup(device);
793
794 err = device_create_file(&device->dev, &dev_attr_display);
795 if (err)
796 goto add_sysfs_error;
797 err = device_create_file(&device->dev, &dev_attr_hddtemp);
798 if (err)
799 goto add_sysfs_error;
800 err = device_create_file(&device->dev, &dev_attr_als);
801 if (err)
802 goto add_sysfs_error;
803 err = device_create_file(&device->dev, &dev_attr_dock);
804 if (err)
805 goto add_sysfs_error;
806 err = device_create_file(&device->dev, &dev_attr_tablet);
807 if (err)
808 goto add_sysfs_error;
809 return 0;
810
811 add_sysfs_error:
812 cleanup_sysfs(device);
813 return err;
814 }
815
816 static int __exit hp_wmi_bios_remove(struct platform_device *device)
817 {
818 int i;
819 cleanup_sysfs(device);
820
821 for (i = 0; i < rfkill2_count; i++) {
822 rfkill_unregister(rfkill2[i].rfkill);
823 rfkill_destroy(rfkill2[i].rfkill);
824 }
825
826 if (wifi_rfkill) {
827 rfkill_unregister(wifi_rfkill);
828 rfkill_destroy(wifi_rfkill);
829 }
830 if (bluetooth_rfkill) {
831 rfkill_unregister(bluetooth_rfkill);
832 rfkill_destroy(bluetooth_rfkill);
833 }
834 if (wwan_rfkill) {
835 rfkill_unregister(wwan_rfkill);
836 rfkill_destroy(wwan_rfkill);
837 }
838
839 return 0;
840 }
841
842 static int hp_wmi_resume_handler(struct device *device)
843 {
844 /*
845 * Hardware state may have changed while suspended, so trigger
846 * input events for the current state. As this is a switch,
847 * the input layer will only actually pass it on if the state
848 * changed.
849 */
850 if (hp_wmi_input_dev) {
851 input_report_switch(hp_wmi_input_dev, SW_DOCK,
852 hp_wmi_dock_state());
853 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
854 hp_wmi_tablet_state());
855 input_sync(hp_wmi_input_dev);
856 }
857
858 if (rfkill2_count)
859 hp_wmi_rfkill2_refresh();
860
861 if (wifi_rfkill)
862 rfkill_set_states(wifi_rfkill,
863 hp_wmi_get_sw_state(HPWMI_WIFI),
864 hp_wmi_get_hw_state(HPWMI_WIFI));
865 if (bluetooth_rfkill)
866 rfkill_set_states(bluetooth_rfkill,
867 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
868 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
869 if (wwan_rfkill)
870 rfkill_set_states(wwan_rfkill,
871 hp_wmi_get_sw_state(HPWMI_WWAN),
872 hp_wmi_get_hw_state(HPWMI_WWAN));
873
874 return 0;
875 }
876
877 static int __init hp_wmi_init(void)
878 {
879 int err;
880 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
881 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
882
883 if (event_capable) {
884 err = hp_wmi_input_setup();
885 if (err)
886 return err;
887 }
888
889 if (bios_capable) {
890 err = platform_driver_register(&hp_wmi_driver);
891 if (err)
892 goto err_driver_reg;
893 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
894 if (!hp_wmi_platform_dev) {
895 err = -ENOMEM;
896 goto err_device_alloc;
897 }
898 err = platform_device_add(hp_wmi_platform_dev);
899 if (err)
900 goto err_device_add;
901 }
902
903 if (!bios_capable && !event_capable)
904 return -ENODEV;
905
906 return 0;
907
908 err_device_add:
909 platform_device_put(hp_wmi_platform_dev);
910 err_device_alloc:
911 platform_driver_unregister(&hp_wmi_driver);
912 err_driver_reg:
913 if (event_capable)
914 hp_wmi_input_destroy();
915
916 return err;
917 }
918
919 static void __exit hp_wmi_exit(void)
920 {
921 if (wmi_has_guid(HPWMI_EVENT_GUID))
922 hp_wmi_input_destroy();
923
924 if (hp_wmi_platform_dev) {
925 platform_device_unregister(hp_wmi_platform_dev);
926 platform_driver_unregister(&hp_wmi_driver);
927 }
928 }
929
930 module_init(hp_wmi_init);
931 module_exit(hp_wmi_exit);
Linux kernel - Deliverables
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