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