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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_HOTKEY_QUERY 0xc
57#define HPWMI_WIRELESS2_QUERY 0x1b
58
59enum hp_wmi_radio {
60 HPWMI_WIFI = 0,
61 HPWMI_BLUETOOTH = 1,
62 HPWMI_WWAN = 2,
63};
64
65enum 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
75static int __devinit hp_wmi_bios_setup(struct platform_device *device);
76static int __exit hp_wmi_bios_remove(struct platform_device *device);
77static int hp_wmi_resume_handler(struct device *device);
78
79struct bios_args {
80 u32 signature;
81 u32 command;
82 u32 commandtype;
83 u32 datasize;
84 u32 data;
85};
86
87struct bios_return {
88 u32 sigpass;
89 u32 return_code;
90};
91
92enum 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
99enum 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
110struct 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
125struct 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
132static 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
144static struct input_dev *hp_wmi_input_dev;
145static struct platform_device *hp_wmi_platform_dev;
146
147static struct rfkill *wifi_rfkill;
148static struct rfkill *bluetooth_rfkill;
149static struct rfkill *wwan_rfkill;
150
151struct rfkill2_device {
152 u8 id;
153 int num;
154 struct rfkill *rfkill;
155};
156
157static int rfkill2_count;
158static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
159
160static const struct dev_pm_ops hp_wmi_pm_ops = {
161 .resume = hp_wmi_resume_handler,
162 .restore = hp_wmi_resume_handler,
163};
164
165static 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 */
195static 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
250static 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
260static 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
270static 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
280static 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
292static 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
303static 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
316static const struct rfkill_ops hp_wmi_rfkill_ops = {
317 .set_block = hp_wmi_set_block,
318};
319
320static 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
337static 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
354static 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
365static const struct rfkill_ops hp_wmi_rfkill2_ops = {
366 .set_block = hp_wmi_rfkill2_set_block,
367};
368
369static 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
398static 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
407static 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
416static 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
425static 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
434static 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
443static 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
455static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
456static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
457static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
458static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
459static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
460
461static 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
558static 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
606static 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
613static 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
622static int __devinit 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 rfkill_init_sw_state(wifi_rfkill,
638 hp_wmi_get_sw_state(HPWMI_WIFI));
639 rfkill_set_hw_state(wifi_rfkill,
640 hp_wmi_get_hw_state(HPWMI_WIFI));
641 err = rfkill_register(wifi_rfkill);
642 if (err)
643 goto register_wifi_error;
644 }
645
646 if (wireless & 0x2) {
647 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
648 RFKILL_TYPE_BLUETOOTH,
649 &hp_wmi_rfkill_ops,
650 (void *) HPWMI_BLUETOOTH);
651 rfkill_init_sw_state(bluetooth_rfkill,
652 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
653 rfkill_set_hw_state(bluetooth_rfkill,
654 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
655 err = rfkill_register(bluetooth_rfkill);
656 if (err)
657 goto register_bluetooth_error;
658 }
659
660 if (wireless & 0x4) {
661 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
662 RFKILL_TYPE_WWAN,
663 &hp_wmi_rfkill_ops,
664 (void *) HPWMI_WWAN);
665 rfkill_init_sw_state(wwan_rfkill,
666 hp_wmi_get_sw_state(HPWMI_WWAN));
667 rfkill_set_hw_state(wwan_rfkill,
668 hp_wmi_get_hw_state(HPWMI_WWAN));
669 err = rfkill_register(wwan_rfkill);
670 if (err)
671 goto register_wwan_err;
672 }
673
674 return 0;
675register_wwan_err:
676 rfkill_destroy(wwan_rfkill);
677 wwan_rfkill = NULL;
678 if (bluetooth_rfkill)
679 rfkill_unregister(bluetooth_rfkill);
680register_bluetooth_error:
681 rfkill_destroy(bluetooth_rfkill);
682 bluetooth_rfkill = NULL;
683 if (wifi_rfkill)
684 rfkill_unregister(wifi_rfkill);
685register_wifi_error:
686 rfkill_destroy(wifi_rfkill);
687 wifi_rfkill = NULL;
688 return err;
689}
690
691static int __devinit hp_wmi_rfkill2_setup(struct platform_device *device)
692{
693 int err, i;
694 struct bios_rfkill2_state state;
695 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
696 0, sizeof(state));
697 if (err)
698 return err;
699
700 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
701 pr_warn("unable to parse 0x1b query output\n");
702 return -EINVAL;
703 }
704
705 for (i = 0; i < state.count; i++) {
706 struct rfkill *rfkill;
707 enum rfkill_type type;
708 char *name;
709 switch (state.device[i].radio_type) {
710 case HPWMI_WIFI:
711 type = RFKILL_TYPE_WLAN;
712 name = "hp-wifi";
713 break;
714 case HPWMI_BLUETOOTH:
715 type = RFKILL_TYPE_BLUETOOTH;
716 name = "hp-bluetooth";
717 break;
718 case HPWMI_WWAN:
719 type = RFKILL_TYPE_WWAN;
720 name = "hp-wwan";
721 break;
722 default:
723 pr_warn("unknown device type 0x%x\n",
724 state.device[i].radio_type);
725 continue;
726 }
727
728 if (!state.device[i].vendor_id) {
729 pr_warn("zero device %d while %d reported\n",
730 i, state.count);
731 continue;
732 }
733
734 rfkill = rfkill_alloc(name, &device->dev, type,
735 &hp_wmi_rfkill2_ops, (void *)(long)i);
736 if (!rfkill) {
737 err = -ENOMEM;
738 goto fail;
739 }
740
741 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
742 rfkill2[rfkill2_count].num = i;
743 rfkill2[rfkill2_count].rfkill = rfkill;
744
745 rfkill_init_sw_state(rfkill,
746 IS_SWBLOCKED(state.device[i].power));
747 rfkill_set_hw_state(rfkill,
748 IS_HWBLOCKED(state.device[i].power));
749
750 if (!(state.device[i].power & HPWMI_POWER_BIOS))
751 pr_info("device %s blocked by BIOS\n", name);
752
753 err = rfkill_register(rfkill);
754 if (err) {
755 rfkill_destroy(rfkill);
756 goto fail;
757 }
758
759 rfkill2_count++;
760 }
761
762 return 0;
763fail:
764 for (; rfkill2_count > 0; rfkill2_count--) {
765 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
766 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
767 }
768 return err;
769}
770
771static int __devinit hp_wmi_bios_setup(struct platform_device *device)
772{
773 int err;
774
775 /* clear detected rfkill devices */
776 wifi_rfkill = NULL;
777 bluetooth_rfkill = NULL;
778 wwan_rfkill = NULL;
779 rfkill2_count = 0;
780
781 if (hp_wmi_rfkill_setup(device))
782 hp_wmi_rfkill2_setup(device);
783
784 err = device_create_file(&device->dev, &dev_attr_display);
785 if (err)
786 goto add_sysfs_error;
787 err = device_create_file(&device->dev, &dev_attr_hddtemp);
788 if (err)
789 goto add_sysfs_error;
790 err = device_create_file(&device->dev, &dev_attr_als);
791 if (err)
792 goto add_sysfs_error;
793 err = device_create_file(&device->dev, &dev_attr_dock);
794 if (err)
795 goto add_sysfs_error;
796 err = device_create_file(&device->dev, &dev_attr_tablet);
797 if (err)
798 goto add_sysfs_error;
799 return 0;
800
801add_sysfs_error:
802 cleanup_sysfs(device);
803 return err;
804}
805
806static int __exit hp_wmi_bios_remove(struct platform_device *device)
807{
808 int i;
809 cleanup_sysfs(device);
810
811 for (i = 0; i < rfkill2_count; i++) {
812 rfkill_unregister(rfkill2[i].rfkill);
813 rfkill_destroy(rfkill2[i].rfkill);
814 }
815
816 if (wifi_rfkill) {
817 rfkill_unregister(wifi_rfkill);
818 rfkill_destroy(wifi_rfkill);
819 }
820 if (bluetooth_rfkill) {
821 rfkill_unregister(bluetooth_rfkill);
822 rfkill_destroy(bluetooth_rfkill);
823 }
824 if (wwan_rfkill) {
825 rfkill_unregister(wwan_rfkill);
826 rfkill_destroy(wwan_rfkill);
827 }
828
829 return 0;
830}
831
832static int hp_wmi_resume_handler(struct device *device)
833{
834 /*
835 * Hardware state may have changed while suspended, so trigger
836 * input events for the current state. As this is a switch,
837 * the input layer will only actually pass it on if the state
838 * changed.
839 */
840 if (hp_wmi_input_dev) {
841 input_report_switch(hp_wmi_input_dev, SW_DOCK,
842 hp_wmi_dock_state());
843 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
844 hp_wmi_tablet_state());
845 input_sync(hp_wmi_input_dev);
846 }
847
848 if (rfkill2_count)
849 hp_wmi_rfkill2_refresh();
850
851 if (wifi_rfkill)
852 rfkill_set_states(wifi_rfkill,
853 hp_wmi_get_sw_state(HPWMI_WIFI),
854 hp_wmi_get_hw_state(HPWMI_WIFI));
855 if (bluetooth_rfkill)
856 rfkill_set_states(bluetooth_rfkill,
857 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
858 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
859 if (wwan_rfkill)
860 rfkill_set_states(wwan_rfkill,
861 hp_wmi_get_sw_state(HPWMI_WWAN),
862 hp_wmi_get_hw_state(HPWMI_WWAN));
863
864 return 0;
865}
866
867static int __init hp_wmi_init(void)
868{
869 int err;
870 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
871 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
872
873 if (event_capable) {
874 err = hp_wmi_input_setup();
875 if (err)
876 return err;
877 }
878
879 if (bios_capable) {
880 err = platform_driver_register(&hp_wmi_driver);
881 if (err)
882 goto err_driver_reg;
883 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
884 if (!hp_wmi_platform_dev) {
885 err = -ENOMEM;
886 goto err_device_alloc;
887 }
888 err = platform_device_add(hp_wmi_platform_dev);
889 if (err)
890 goto err_device_add;
891 }
892
893 if (!bios_capable && !event_capable)
894 return -ENODEV;
895
896 return 0;
897
898err_device_add:
899 platform_device_put(hp_wmi_platform_dev);
900err_device_alloc:
901 platform_driver_unregister(&hp_wmi_driver);
902err_driver_reg:
903 if (event_capable)
904 hp_wmi_input_destroy();
905
906 return err;
907}
908
909static void __exit hp_wmi_exit(void)
910{
911 if (wmi_has_guid(HPWMI_EVENT_GUID))
912 hp_wmi_input_destroy();
913
914 if (hp_wmi_platform_dev) {
915 platform_device_unregister(hp_wmi_platform_dev);
916 platform_driver_unregister(&hp_wmi_driver);
917 }
918}
919
920module_init(hp_wmi_init);
921module_exit(hp_wmi_exit);
1/*
2 * HP WMI hotkeys
3 *
4 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
5 * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
6 *
7 * Portions based on wistron_btns.c:
8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/slab.h>
33#include <linux/types.h>
34#include <linux/input.h>
35#include <linux/input/sparse-keymap.h>
36#include <linux/platform_device.h>
37#include <linux/acpi.h>
38#include <linux/rfkill.h>
39#include <linux/string.h>
40
41MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
42MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
43MODULE_LICENSE("GPL");
44
45MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
46MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
47
48#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
49#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
50
51enum hp_wmi_radio {
52 HPWMI_WIFI = 0x0,
53 HPWMI_BLUETOOTH = 0x1,
54 HPWMI_WWAN = 0x2,
55 HPWMI_GPS = 0x3,
56};
57
58enum hp_wmi_event_ids {
59 HPWMI_DOCK_EVENT = 0x01,
60 HPWMI_PARK_HDD = 0x02,
61 HPWMI_SMART_ADAPTER = 0x03,
62 HPWMI_BEZEL_BUTTON = 0x04,
63 HPWMI_WIRELESS = 0x05,
64 HPWMI_CPU_BATTERY_THROTTLE = 0x06,
65 HPWMI_LOCK_SWITCH = 0x07,
66 HPWMI_LID_SWITCH = 0x08,
67 HPWMI_SCREEN_ROTATION = 0x09,
68 HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
69 HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
70 HPWMI_PROXIMITY_SENSOR = 0x0C,
71 HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
72 HPWMI_PEAKSHIFT_PERIOD = 0x0F,
73 HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
74};
75
76struct bios_args {
77 u32 signature;
78 u32 command;
79 u32 commandtype;
80 u32 datasize;
81 u32 data;
82};
83
84enum hp_wmi_commandtype {
85 HPWMI_DISPLAY_QUERY = 0x01,
86 HPWMI_HDDTEMP_QUERY = 0x02,
87 HPWMI_ALS_QUERY = 0x03,
88 HPWMI_HARDWARE_QUERY = 0x04,
89 HPWMI_WIRELESS_QUERY = 0x05,
90 HPWMI_BATTERY_QUERY = 0x07,
91 HPWMI_BIOS_QUERY = 0x09,
92 HPWMI_FEATURE_QUERY = 0x0b,
93 HPWMI_HOTKEY_QUERY = 0x0c,
94 HPWMI_FEATURE2_QUERY = 0x0d,
95 HPWMI_WIRELESS2_QUERY = 0x1b,
96 HPWMI_POSTCODEERROR_QUERY = 0x2a,
97};
98
99enum hp_wmi_command {
100 HPWMI_READ = 0x01,
101 HPWMI_WRITE = 0x02,
102 HPWMI_ODM = 0x03,
103};
104
105enum hp_wmi_hardware_mask {
106 HPWMI_DOCK_MASK = 0x01,
107 HPWMI_TABLET_MASK = 0x04,
108};
109
110struct bios_return {
111 u32 sigpass;
112 u32 return_code;
113};
114
115enum hp_return_value {
116 HPWMI_RET_WRONG_SIGNATURE = 0x02,
117 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
118 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
119 HPWMI_RET_INVALID_PARAMETERS = 0x05,
120};
121
122enum hp_wireless2_bits {
123 HPWMI_POWER_STATE = 0x01,
124 HPWMI_POWER_SOFT = 0x02,
125 HPWMI_POWER_BIOS = 0x04,
126 HPWMI_POWER_HARD = 0x08,
127};
128
129#define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
130 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
131#define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
132
133struct bios_rfkill2_device_state {
134 u8 radio_type;
135 u8 bus_type;
136 u16 vendor_id;
137 u16 product_id;
138 u16 subsys_vendor_id;
139 u16 subsys_product_id;
140 u8 rfkill_id;
141 u8 power;
142 u8 unknown[4];
143};
144
145/* 7 devices fit into the 128 byte buffer */
146#define HPWMI_MAX_RFKILL2_DEVICES 7
147
148struct bios_rfkill2_state {
149 u8 unknown[7];
150 u8 count;
151 u8 pad[8];
152 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
153};
154
155static const struct key_entry hp_wmi_keymap[] = {
156 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
157 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
158 { KE_KEY, 0x20e6, { KEY_PROG1 } },
159 { KE_KEY, 0x20e8, { KEY_MEDIA } },
160 { KE_KEY, 0x2142, { KEY_MEDIA } },
161 { KE_KEY, 0x213b, { KEY_INFO } },
162 { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
163 { KE_KEY, 0x216a, { KEY_SETUP } },
164 { KE_KEY, 0x231b, { KEY_HELP } },
165 { KE_END, 0 }
166};
167
168static struct input_dev *hp_wmi_input_dev;
169static struct platform_device *hp_wmi_platform_dev;
170
171static struct rfkill *wifi_rfkill;
172static struct rfkill *bluetooth_rfkill;
173static struct rfkill *wwan_rfkill;
174
175struct rfkill2_device {
176 u8 id;
177 int num;
178 struct rfkill *rfkill;
179};
180
181static int rfkill2_count;
182static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
183
184/* map output size to the corresponding WMI method id */
185static inline int encode_outsize_for_pvsz(int outsize)
186{
187 if (outsize > 4096)
188 return -EINVAL;
189 if (outsize > 1024)
190 return 5;
191 if (outsize > 128)
192 return 4;
193 if (outsize > 4)
194 return 3;
195 if (outsize > 0)
196 return 2;
197 return 1;
198}
199
200/*
201 * hp_wmi_perform_query
202 *
203 * query: The commandtype (enum hp_wmi_commandtype)
204 * write: The command (enum hp_wmi_command)
205 * buffer: Buffer used as input and/or output
206 * insize: Size of input buffer
207 * outsize: Size of output buffer
208 *
209 * returns zero on success
210 * an HP WMI query specific error code (which is positive)
211 * -EINVAL if the query was not successful at all
212 * -EINVAL if the output buffer size exceeds buffersize
213 *
214 * Note: The buffersize must at least be the maximum of the input and output
215 * size. E.g. Battery info query is defined to have 1 byte input
216 * and 128 byte output. The caller would do:
217 * buffer = kzalloc(128, GFP_KERNEL);
218 * ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
219 */
220static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
221 void *buffer, int insize, int outsize)
222{
223 int mid;
224 struct bios_return *bios_return;
225 int actual_outsize;
226 union acpi_object *obj;
227 struct bios_args args = {
228 .signature = 0x55434553,
229 .command = command,
230 .commandtype = query,
231 .datasize = insize,
232 .data = 0,
233 };
234 struct acpi_buffer input = { sizeof(struct bios_args), &args };
235 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
236 int ret = 0;
237
238 mid = encode_outsize_for_pvsz(outsize);
239 if (WARN_ON(mid < 0))
240 return mid;
241
242 if (WARN_ON(insize > sizeof(args.data)))
243 return -EINVAL;
244 memcpy(&args.data, buffer, insize);
245
246 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
247
248 obj = output.pointer;
249
250 if (!obj)
251 return -EINVAL;
252
253 if (obj->type != ACPI_TYPE_BUFFER) {
254 ret = -EINVAL;
255 goto out_free;
256 }
257
258 bios_return = (struct bios_return *)obj->buffer.pointer;
259 ret = bios_return->return_code;
260
261 if (ret) {
262 if (ret != HPWMI_RET_UNKNOWN_CMDTYPE)
263 pr_warn("query 0x%x returned error 0x%x\n", query, ret);
264 goto out_free;
265 }
266
267 /* Ignore output data of zero size */
268 if (!outsize)
269 goto out_free;
270
271 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
272 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
273 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
274
275out_free:
276 kfree(obj);
277 return ret;
278}
279
280static int hp_wmi_read_int(int query)
281{
282 int val = 0, ret;
283
284 ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
285 sizeof(val), sizeof(val));
286
287 if (ret)
288 return ret < 0 ? ret : -EINVAL;
289
290 return val;
291}
292
293static int hp_wmi_hw_state(int mask)
294{
295 int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
296
297 if (state < 0)
298 return state;
299
300 return !!(state & mask);
301}
302
303static int __init hp_wmi_bios_2008_later(void)
304{
305 int state = 0;
306 int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
307 sizeof(state), sizeof(state));
308 if (!ret)
309 return 1;
310
311 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
312}
313
314static int __init hp_wmi_bios_2009_later(void)
315{
316 int state = 0;
317 int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
318 sizeof(state), sizeof(state));
319 if (!ret)
320 return 1;
321
322 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
323}
324
325static int __init hp_wmi_enable_hotkeys(void)
326{
327 int value = 0x6e;
328 int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
329 sizeof(value), 0);
330
331 return ret <= 0 ? ret : -EINVAL;
332}
333
334static int hp_wmi_set_block(void *data, bool blocked)
335{
336 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
337 int query = BIT(r + 8) | ((!blocked) << r);
338 int ret;
339
340 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
341 &query, sizeof(query), 0);
342
343 return ret <= 0 ? ret : -EINVAL;
344}
345
346static const struct rfkill_ops hp_wmi_rfkill_ops = {
347 .set_block = hp_wmi_set_block,
348};
349
350static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
351{
352 int mask = 0x200 << (r * 8);
353
354 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
355
356 /* TBD: Pass error */
357 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
358
359 return !(wireless & mask);
360}
361
362static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
363{
364 int mask = 0x800 << (r * 8);
365
366 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
367
368 /* TBD: Pass error */
369 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
370
371 return !(wireless & mask);
372}
373
374static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
375{
376 int rfkill_id = (int)(long)data;
377 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
378 int ret;
379
380 ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
381 buffer, sizeof(buffer), 0);
382
383 return ret <= 0 ? ret : -EINVAL;
384}
385
386static const struct rfkill_ops hp_wmi_rfkill2_ops = {
387 .set_block = hp_wmi_rfkill2_set_block,
388};
389
390static int hp_wmi_rfkill2_refresh(void)
391{
392 struct bios_rfkill2_state state;
393 int err, i;
394
395 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
396 0, sizeof(state));
397 if (err)
398 return err;
399
400 for (i = 0; i < rfkill2_count; i++) {
401 int num = rfkill2[i].num;
402 struct bios_rfkill2_device_state *devstate;
403 devstate = &state.device[num];
404
405 if (num >= state.count ||
406 devstate->rfkill_id != rfkill2[i].id) {
407 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
408 continue;
409 }
410
411 rfkill_set_states(rfkill2[i].rfkill,
412 IS_SWBLOCKED(devstate->power),
413 IS_HWBLOCKED(devstate->power));
414 }
415
416 return 0;
417}
418
419static ssize_t display_show(struct device *dev, struct device_attribute *attr,
420 char *buf)
421{
422 int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
423 if (value < 0)
424 return value;
425 return sprintf(buf, "%d\n", value);
426}
427
428static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
429 char *buf)
430{
431 int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
432 if (value < 0)
433 return value;
434 return sprintf(buf, "%d\n", value);
435}
436
437static ssize_t als_show(struct device *dev, struct device_attribute *attr,
438 char *buf)
439{
440 int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
441 if (value < 0)
442 return value;
443 return sprintf(buf, "%d\n", value);
444}
445
446static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
447 char *buf)
448{
449 int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
450 if (value < 0)
451 return value;
452 return sprintf(buf, "%d\n", value);
453}
454
455static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
456 char *buf)
457{
458 int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
459 if (value < 0)
460 return value;
461 return sprintf(buf, "%d\n", value);
462}
463
464static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
465 char *buf)
466{
467 /* Get the POST error code of previous boot failure. */
468 int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
469 if (value < 0)
470 return value;
471 return sprintf(buf, "0x%x\n", value);
472}
473
474static ssize_t als_store(struct device *dev, struct device_attribute *attr,
475 const char *buf, size_t count)
476{
477 u32 tmp = simple_strtoul(buf, NULL, 10);
478 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
479 sizeof(tmp), sizeof(tmp));
480 if (ret)
481 return ret < 0 ? ret : -EINVAL;
482
483 return count;
484}
485
486static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
487 const char *buf, size_t count)
488{
489 long unsigned int tmp2;
490 int ret;
491 u32 tmp;
492
493 ret = kstrtoul(buf, 10, &tmp2);
494 if (!ret && tmp2 != 1)
495 ret = -EINVAL;
496 if (ret)
497 goto out;
498
499 /* Clear the POST error code. It is kept until until cleared. */
500 tmp = (u32) tmp2;
501 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
502 sizeof(tmp), sizeof(tmp));
503
504out:
505 if (ret)
506 return ret < 0 ? ret : -EINVAL;
507
508 return count;
509}
510
511static DEVICE_ATTR_RO(display);
512static DEVICE_ATTR_RO(hddtemp);
513static DEVICE_ATTR_RW(als);
514static DEVICE_ATTR_RO(dock);
515static DEVICE_ATTR_RO(tablet);
516static DEVICE_ATTR_RW(postcode);
517
518static void hp_wmi_notify(u32 value, void *context)
519{
520 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
521 u32 event_id, event_data;
522 union acpi_object *obj;
523 acpi_status status;
524 u32 *location;
525 int key_code;
526
527 status = wmi_get_event_data(value, &response);
528 if (status != AE_OK) {
529 pr_info("bad event status 0x%x\n", status);
530 return;
531 }
532
533 obj = (union acpi_object *)response.pointer;
534
535 if (!obj)
536 return;
537 if (obj->type != ACPI_TYPE_BUFFER) {
538 pr_info("Unknown response received %d\n", obj->type);
539 kfree(obj);
540 return;
541 }
542
543 /*
544 * Depending on ACPI version the concatenation of id and event data
545 * inside _WED function will result in a 8 or 16 byte buffer.
546 */
547 location = (u32 *)obj->buffer.pointer;
548 if (obj->buffer.length == 8) {
549 event_id = *location;
550 event_data = *(location + 1);
551 } else if (obj->buffer.length == 16) {
552 event_id = *location;
553 event_data = *(location + 2);
554 } else {
555 pr_info("Unknown buffer length %d\n", obj->buffer.length);
556 kfree(obj);
557 return;
558 }
559 kfree(obj);
560
561 switch (event_id) {
562 case HPWMI_DOCK_EVENT:
563 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
564 input_report_switch(hp_wmi_input_dev, SW_DOCK,
565 hp_wmi_hw_state(HPWMI_DOCK_MASK));
566 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
567 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
568 hp_wmi_hw_state(HPWMI_TABLET_MASK));
569 input_sync(hp_wmi_input_dev);
570 break;
571 case HPWMI_PARK_HDD:
572 break;
573 case HPWMI_SMART_ADAPTER:
574 break;
575 case HPWMI_BEZEL_BUTTON:
576 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
577 if (key_code < 0)
578 break;
579
580 if (!sparse_keymap_report_event(hp_wmi_input_dev,
581 key_code, 1, true))
582 pr_info("Unknown key code - 0x%x\n", key_code);
583 break;
584 case HPWMI_WIRELESS:
585 if (rfkill2_count) {
586 hp_wmi_rfkill2_refresh();
587 break;
588 }
589
590 if (wifi_rfkill)
591 rfkill_set_states(wifi_rfkill,
592 hp_wmi_get_sw_state(HPWMI_WIFI),
593 hp_wmi_get_hw_state(HPWMI_WIFI));
594 if (bluetooth_rfkill)
595 rfkill_set_states(bluetooth_rfkill,
596 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
597 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
598 if (wwan_rfkill)
599 rfkill_set_states(wwan_rfkill,
600 hp_wmi_get_sw_state(HPWMI_WWAN),
601 hp_wmi_get_hw_state(HPWMI_WWAN));
602 break;
603 case HPWMI_CPU_BATTERY_THROTTLE:
604 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
605 break;
606 case HPWMI_LOCK_SWITCH:
607 break;
608 case HPWMI_LID_SWITCH:
609 break;
610 case HPWMI_SCREEN_ROTATION:
611 break;
612 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
613 break;
614 case HPWMI_COOLSENSE_SYSTEM_HOT:
615 break;
616 case HPWMI_PROXIMITY_SENSOR:
617 break;
618 case HPWMI_BACKLIT_KB_BRIGHTNESS:
619 break;
620 case HPWMI_PEAKSHIFT_PERIOD:
621 break;
622 case HPWMI_BATTERY_CHARGE_PERIOD:
623 break;
624 default:
625 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
626 break;
627 }
628}
629
630static int __init hp_wmi_input_setup(void)
631{
632 acpi_status status;
633 int err, val;
634
635 hp_wmi_input_dev = input_allocate_device();
636 if (!hp_wmi_input_dev)
637 return -ENOMEM;
638
639 hp_wmi_input_dev->name = "HP WMI hotkeys";
640 hp_wmi_input_dev->phys = "wmi/input0";
641 hp_wmi_input_dev->id.bustype = BUS_HOST;
642
643 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
644
645 /* Dock */
646 val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
647 if (!(val < 0)) {
648 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
649 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
650 }
651
652 /* Tablet mode */
653 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
654 if (!(val < 0)) {
655 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
656 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
657 }
658
659 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
660 if (err)
661 goto err_free_dev;
662
663 /* Set initial hardware state */
664 input_sync(hp_wmi_input_dev);
665
666 if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
667 hp_wmi_enable_hotkeys();
668
669 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
670 if (ACPI_FAILURE(status)) {
671 err = -EIO;
672 goto err_free_dev;
673 }
674
675 err = input_register_device(hp_wmi_input_dev);
676 if (err)
677 goto err_uninstall_notifier;
678
679 return 0;
680
681 err_uninstall_notifier:
682 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
683 err_free_dev:
684 input_free_device(hp_wmi_input_dev);
685 return err;
686}
687
688static void hp_wmi_input_destroy(void)
689{
690 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
691 input_unregister_device(hp_wmi_input_dev);
692}
693
694static void cleanup_sysfs(struct platform_device *device)
695{
696 device_remove_file(&device->dev, &dev_attr_display);
697 device_remove_file(&device->dev, &dev_attr_hddtemp);
698 device_remove_file(&device->dev, &dev_attr_als);
699 device_remove_file(&device->dev, &dev_attr_dock);
700 device_remove_file(&device->dev, &dev_attr_tablet);
701 device_remove_file(&device->dev, &dev_attr_postcode);
702}
703
704static int __init hp_wmi_rfkill_setup(struct platform_device *device)
705{
706 int err, wireless;
707
708 wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
709 if (wireless < 0)
710 return wireless;
711
712 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
713 sizeof(wireless), 0);
714 if (err)
715 return err;
716
717 if (wireless & 0x1) {
718 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
719 RFKILL_TYPE_WLAN,
720 &hp_wmi_rfkill_ops,
721 (void *) HPWMI_WIFI);
722 if (!wifi_rfkill)
723 return -ENOMEM;
724 rfkill_init_sw_state(wifi_rfkill,
725 hp_wmi_get_sw_state(HPWMI_WIFI));
726 rfkill_set_hw_state(wifi_rfkill,
727 hp_wmi_get_hw_state(HPWMI_WIFI));
728 err = rfkill_register(wifi_rfkill);
729 if (err)
730 goto register_wifi_error;
731 }
732
733 if (wireless & 0x2) {
734 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
735 RFKILL_TYPE_BLUETOOTH,
736 &hp_wmi_rfkill_ops,
737 (void *) HPWMI_BLUETOOTH);
738 if (!bluetooth_rfkill) {
739 err = -ENOMEM;
740 goto register_bluetooth_error;
741 }
742 rfkill_init_sw_state(bluetooth_rfkill,
743 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
744 rfkill_set_hw_state(bluetooth_rfkill,
745 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
746 err = rfkill_register(bluetooth_rfkill);
747 if (err)
748 goto register_bluetooth_error;
749 }
750
751 if (wireless & 0x4) {
752 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
753 RFKILL_TYPE_WWAN,
754 &hp_wmi_rfkill_ops,
755 (void *) HPWMI_WWAN);
756 if (!wwan_rfkill) {
757 err = -ENOMEM;
758 goto register_wwan_error;
759 }
760 rfkill_init_sw_state(wwan_rfkill,
761 hp_wmi_get_sw_state(HPWMI_WWAN));
762 rfkill_set_hw_state(wwan_rfkill,
763 hp_wmi_get_hw_state(HPWMI_WWAN));
764 err = rfkill_register(wwan_rfkill);
765 if (err)
766 goto register_wwan_error;
767 }
768
769 return 0;
770
771register_wwan_error:
772 rfkill_destroy(wwan_rfkill);
773 wwan_rfkill = NULL;
774 if (bluetooth_rfkill)
775 rfkill_unregister(bluetooth_rfkill);
776register_bluetooth_error:
777 rfkill_destroy(bluetooth_rfkill);
778 bluetooth_rfkill = NULL;
779 if (wifi_rfkill)
780 rfkill_unregister(wifi_rfkill);
781register_wifi_error:
782 rfkill_destroy(wifi_rfkill);
783 wifi_rfkill = NULL;
784 return err;
785}
786
787static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
788{
789 struct bios_rfkill2_state state;
790 int err, i;
791
792 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
793 0, sizeof(state));
794 if (err)
795 return err < 0 ? err : -EINVAL;
796
797 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
798 pr_warn("unable to parse 0x1b query output\n");
799 return -EINVAL;
800 }
801
802 for (i = 0; i < state.count; i++) {
803 struct rfkill *rfkill;
804 enum rfkill_type type;
805 char *name;
806 switch (state.device[i].radio_type) {
807 case HPWMI_WIFI:
808 type = RFKILL_TYPE_WLAN;
809 name = "hp-wifi";
810 break;
811 case HPWMI_BLUETOOTH:
812 type = RFKILL_TYPE_BLUETOOTH;
813 name = "hp-bluetooth";
814 break;
815 case HPWMI_WWAN:
816 type = RFKILL_TYPE_WWAN;
817 name = "hp-wwan";
818 break;
819 case HPWMI_GPS:
820 type = RFKILL_TYPE_GPS;
821 name = "hp-gps";
822 break;
823 default:
824 pr_warn("unknown device type 0x%x\n",
825 state.device[i].radio_type);
826 continue;
827 }
828
829 if (!state.device[i].vendor_id) {
830 pr_warn("zero device %d while %d reported\n",
831 i, state.count);
832 continue;
833 }
834
835 rfkill = rfkill_alloc(name, &device->dev, type,
836 &hp_wmi_rfkill2_ops, (void *)(long)i);
837 if (!rfkill) {
838 err = -ENOMEM;
839 goto fail;
840 }
841
842 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
843 rfkill2[rfkill2_count].num = i;
844 rfkill2[rfkill2_count].rfkill = rfkill;
845
846 rfkill_init_sw_state(rfkill,
847 IS_SWBLOCKED(state.device[i].power));
848 rfkill_set_hw_state(rfkill,
849 IS_HWBLOCKED(state.device[i].power));
850
851 if (!(state.device[i].power & HPWMI_POWER_BIOS))
852 pr_info("device %s blocked by BIOS\n", name);
853
854 err = rfkill_register(rfkill);
855 if (err) {
856 rfkill_destroy(rfkill);
857 goto fail;
858 }
859
860 rfkill2_count++;
861 }
862
863 return 0;
864fail:
865 for (; rfkill2_count > 0; rfkill2_count--) {
866 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
867 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
868 }
869 return err;
870}
871
872static int __init hp_wmi_bios_setup(struct platform_device *device)
873{
874 int err;
875
876 /* clear detected rfkill devices */
877 wifi_rfkill = NULL;
878 bluetooth_rfkill = NULL;
879 wwan_rfkill = NULL;
880 rfkill2_count = 0;
881
882 if (hp_wmi_rfkill_setup(device))
883 hp_wmi_rfkill2_setup(device);
884
885 err = device_create_file(&device->dev, &dev_attr_display);
886 if (err)
887 goto add_sysfs_error;
888 err = device_create_file(&device->dev, &dev_attr_hddtemp);
889 if (err)
890 goto add_sysfs_error;
891 err = device_create_file(&device->dev, &dev_attr_als);
892 if (err)
893 goto add_sysfs_error;
894 err = device_create_file(&device->dev, &dev_attr_dock);
895 if (err)
896 goto add_sysfs_error;
897 err = device_create_file(&device->dev, &dev_attr_tablet);
898 if (err)
899 goto add_sysfs_error;
900 err = device_create_file(&device->dev, &dev_attr_postcode);
901 if (err)
902 goto add_sysfs_error;
903 return 0;
904
905add_sysfs_error:
906 cleanup_sysfs(device);
907 return err;
908}
909
910static int __exit hp_wmi_bios_remove(struct platform_device *device)
911{
912 int i;
913 cleanup_sysfs(device);
914
915 for (i = 0; i < rfkill2_count; i++) {
916 rfkill_unregister(rfkill2[i].rfkill);
917 rfkill_destroy(rfkill2[i].rfkill);
918 }
919
920 if (wifi_rfkill) {
921 rfkill_unregister(wifi_rfkill);
922 rfkill_destroy(wifi_rfkill);
923 }
924 if (bluetooth_rfkill) {
925 rfkill_unregister(bluetooth_rfkill);
926 rfkill_destroy(bluetooth_rfkill);
927 }
928 if (wwan_rfkill) {
929 rfkill_unregister(wwan_rfkill);
930 rfkill_destroy(wwan_rfkill);
931 }
932
933 return 0;
934}
935
936static int hp_wmi_resume_handler(struct device *device)
937{
938 /*
939 * Hardware state may have changed while suspended, so trigger
940 * input events for the current state. As this is a switch,
941 * the input layer will only actually pass it on if the state
942 * changed.
943 */
944 if (hp_wmi_input_dev) {
945 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
946 input_report_switch(hp_wmi_input_dev, SW_DOCK,
947 hp_wmi_hw_state(HPWMI_DOCK_MASK));
948 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
949 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
950 hp_wmi_hw_state(HPWMI_TABLET_MASK));
951 input_sync(hp_wmi_input_dev);
952 }
953
954 if (rfkill2_count)
955 hp_wmi_rfkill2_refresh();
956
957 if (wifi_rfkill)
958 rfkill_set_states(wifi_rfkill,
959 hp_wmi_get_sw_state(HPWMI_WIFI),
960 hp_wmi_get_hw_state(HPWMI_WIFI));
961 if (bluetooth_rfkill)
962 rfkill_set_states(bluetooth_rfkill,
963 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
964 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
965 if (wwan_rfkill)
966 rfkill_set_states(wwan_rfkill,
967 hp_wmi_get_sw_state(HPWMI_WWAN),
968 hp_wmi_get_hw_state(HPWMI_WWAN));
969
970 return 0;
971}
972
973static const struct dev_pm_ops hp_wmi_pm_ops = {
974 .resume = hp_wmi_resume_handler,
975 .restore = hp_wmi_resume_handler,
976};
977
978static struct platform_driver hp_wmi_driver = {
979 .driver = {
980 .name = "hp-wmi",
981 .pm = &hp_wmi_pm_ops,
982 },
983 .remove = __exit_p(hp_wmi_bios_remove),
984};
985
986static int __init hp_wmi_init(void)
987{
988 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
989 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
990 int err;
991
992 if (!bios_capable && !event_capable)
993 return -ENODEV;
994
995 if (event_capable) {
996 err = hp_wmi_input_setup();
997 if (err)
998 return err;
999 }
1000
1001 if (bios_capable) {
1002 hp_wmi_platform_dev =
1003 platform_device_register_simple("hp-wmi", -1, NULL, 0);
1004 if (IS_ERR(hp_wmi_platform_dev)) {
1005 err = PTR_ERR(hp_wmi_platform_dev);
1006 goto err_destroy_input;
1007 }
1008
1009 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1010 if (err)
1011 goto err_unregister_device;
1012 }
1013
1014 return 0;
1015
1016err_unregister_device:
1017 platform_device_unregister(hp_wmi_platform_dev);
1018err_destroy_input:
1019 if (event_capable)
1020 hp_wmi_input_destroy();
1021
1022 return err;
1023}
1024module_init(hp_wmi_init);
1025
1026static void __exit hp_wmi_exit(void)
1027{
1028 if (wmi_has_guid(HPWMI_EVENT_GUID))
1029 hp_wmi_input_destroy();
1030
1031 if (hp_wmi_platform_dev) {
1032 platform_device_unregister(hp_wmi_platform_dev);
1033 platform_driver_unregister(&hp_wmi_driver);
1034 }
1035}
1036module_exit(hp_wmi_exit);