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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 u8 data[128];
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 HPWMI_POWER_FW_OR_HW = HPWMI_POWER_BIOS | HPWMI_POWER_HARD,
115};
116
117#define IS_HWBLOCKED(x) ((x & HPWMI_POWER_FW_OR_HW) != HPWMI_POWER_FW_OR_HW)
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[0], 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 u8 state[128];
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 sizeof(state), 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;
465 int ret;
466
467 ret = kstrtou32(buf, 10, &tmp);
468 if (ret)
469 return ret;
470
471 ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
472 sizeof(tmp), sizeof(tmp));
473 if (ret)
474 return ret < 0 ? ret : -EINVAL;
475
476 return count;
477}
478
479static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
480 const char *buf, size_t count)
481{
482 u32 tmp = 1;
483 bool clear;
484 int ret;
485
486 ret = kstrtobool(buf, &clear);
487 if (ret)
488 return ret;
489
490 if (clear == false)
491 return -EINVAL;
492
493 /* Clear the POST error code. It is kept until until cleared. */
494 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
495 sizeof(tmp), sizeof(tmp));
496 if (ret)
497 return ret < 0 ? ret : -EINVAL;
498
499 return count;
500}
501
502static DEVICE_ATTR_RO(display);
503static DEVICE_ATTR_RO(hddtemp);
504static DEVICE_ATTR_RW(als);
505static DEVICE_ATTR_RO(dock);
506static DEVICE_ATTR_RO(tablet);
507static DEVICE_ATTR_RW(postcode);
508
509static struct attribute *hp_wmi_attrs[] = {
510 &dev_attr_display.attr,
511 &dev_attr_hddtemp.attr,
512 &dev_attr_als.attr,
513 &dev_attr_dock.attr,
514 &dev_attr_tablet.attr,
515 &dev_attr_postcode.attr,
516 NULL,
517};
518ATTRIBUTE_GROUPS(hp_wmi);
519
520static void hp_wmi_notify(u32 value, void *context)
521{
522 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
523 u32 event_id, event_data;
524 union acpi_object *obj;
525 acpi_status status;
526 u32 *location;
527 int key_code;
528
529 status = wmi_get_event_data(value, &response);
530 if (status != AE_OK) {
531 pr_info("bad event status 0x%x\n", status);
532 return;
533 }
534
535 obj = (union acpi_object *)response.pointer;
536
537 if (!obj)
538 return;
539 if (obj->type != ACPI_TYPE_BUFFER) {
540 pr_info("Unknown response received %d\n", obj->type);
541 kfree(obj);
542 return;
543 }
544
545 /*
546 * Depending on ACPI version the concatenation of id and event data
547 * inside _WED function will result in a 8 or 16 byte buffer.
548 */
549 location = (u32 *)obj->buffer.pointer;
550 if (obj->buffer.length == 8) {
551 event_id = *location;
552 event_data = *(location + 1);
553 } else if (obj->buffer.length == 16) {
554 event_id = *location;
555 event_data = *(location + 2);
556 } else {
557 pr_info("Unknown buffer length %d\n", obj->buffer.length);
558 kfree(obj);
559 return;
560 }
561 kfree(obj);
562
563 switch (event_id) {
564 case HPWMI_DOCK_EVENT:
565 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
566 input_report_switch(hp_wmi_input_dev, SW_DOCK,
567 hp_wmi_hw_state(HPWMI_DOCK_MASK));
568 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
569 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
570 hp_wmi_hw_state(HPWMI_TABLET_MASK));
571 input_sync(hp_wmi_input_dev);
572 break;
573 case HPWMI_PARK_HDD:
574 break;
575 case HPWMI_SMART_ADAPTER:
576 break;
577 case HPWMI_BEZEL_BUTTON:
578 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
579 if (key_code < 0)
580 break;
581
582 if (!sparse_keymap_report_event(hp_wmi_input_dev,
583 key_code, 1, true))
584 pr_info("Unknown key code - 0x%x\n", key_code);
585 break;
586 case HPWMI_WIRELESS:
587 if (rfkill2_count) {
588 hp_wmi_rfkill2_refresh();
589 break;
590 }
591
592 if (wifi_rfkill)
593 rfkill_set_states(wifi_rfkill,
594 hp_wmi_get_sw_state(HPWMI_WIFI),
595 hp_wmi_get_hw_state(HPWMI_WIFI));
596 if (bluetooth_rfkill)
597 rfkill_set_states(bluetooth_rfkill,
598 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
599 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
600 if (wwan_rfkill)
601 rfkill_set_states(wwan_rfkill,
602 hp_wmi_get_sw_state(HPWMI_WWAN),
603 hp_wmi_get_hw_state(HPWMI_WWAN));
604 break;
605 case HPWMI_CPU_BATTERY_THROTTLE:
606 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
607 break;
608 case HPWMI_LOCK_SWITCH:
609 break;
610 case HPWMI_LID_SWITCH:
611 break;
612 case HPWMI_SCREEN_ROTATION:
613 break;
614 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
615 break;
616 case HPWMI_COOLSENSE_SYSTEM_HOT:
617 break;
618 case HPWMI_PROXIMITY_SENSOR:
619 break;
620 case HPWMI_BACKLIT_KB_BRIGHTNESS:
621 break;
622 case HPWMI_PEAKSHIFT_PERIOD:
623 break;
624 case HPWMI_BATTERY_CHARGE_PERIOD:
625 break;
626 default:
627 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
628 break;
629 }
630}
631
632static int __init hp_wmi_input_setup(void)
633{
634 acpi_status status;
635 int err, val;
636
637 hp_wmi_input_dev = input_allocate_device();
638 if (!hp_wmi_input_dev)
639 return -ENOMEM;
640
641 hp_wmi_input_dev->name = "HP WMI hotkeys";
642 hp_wmi_input_dev->phys = "wmi/input0";
643 hp_wmi_input_dev->id.bustype = BUS_HOST;
644
645 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
646
647 /* Dock */
648 val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
649 if (!(val < 0)) {
650 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
651 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
652 }
653
654 /* Tablet mode */
655 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
656 if (!(val < 0)) {
657 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
658 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
659 }
660
661 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
662 if (err)
663 goto err_free_dev;
664
665 /* Set initial hardware state */
666 input_sync(hp_wmi_input_dev);
667
668 if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
669 hp_wmi_enable_hotkeys();
670
671 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
672 if (ACPI_FAILURE(status)) {
673 err = -EIO;
674 goto err_free_dev;
675 }
676
677 err = input_register_device(hp_wmi_input_dev);
678 if (err)
679 goto err_uninstall_notifier;
680
681 return 0;
682
683 err_uninstall_notifier:
684 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
685 err_free_dev:
686 input_free_device(hp_wmi_input_dev);
687 return err;
688}
689
690static void hp_wmi_input_destroy(void)
691{
692 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
693 input_unregister_device(hp_wmi_input_dev);
694}
695
696static int __init hp_wmi_rfkill_setup(struct platform_device *device)
697{
698 int err, wireless;
699
700 wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
701 if (wireless < 0)
702 return wireless;
703
704 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
705 sizeof(wireless), 0);
706 if (err)
707 return err;
708
709 if (wireless & 0x1) {
710 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
711 RFKILL_TYPE_WLAN,
712 &hp_wmi_rfkill_ops,
713 (void *) HPWMI_WIFI);
714 if (!wifi_rfkill)
715 return -ENOMEM;
716 rfkill_init_sw_state(wifi_rfkill,
717 hp_wmi_get_sw_state(HPWMI_WIFI));
718 rfkill_set_hw_state(wifi_rfkill,
719 hp_wmi_get_hw_state(HPWMI_WIFI));
720 err = rfkill_register(wifi_rfkill);
721 if (err)
722 goto register_wifi_error;
723 }
724
725 if (wireless & 0x2) {
726 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
727 RFKILL_TYPE_BLUETOOTH,
728 &hp_wmi_rfkill_ops,
729 (void *) HPWMI_BLUETOOTH);
730 if (!bluetooth_rfkill) {
731 err = -ENOMEM;
732 goto register_bluetooth_error;
733 }
734 rfkill_init_sw_state(bluetooth_rfkill,
735 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
736 rfkill_set_hw_state(bluetooth_rfkill,
737 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
738 err = rfkill_register(bluetooth_rfkill);
739 if (err)
740 goto register_bluetooth_error;
741 }
742
743 if (wireless & 0x4) {
744 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
745 RFKILL_TYPE_WWAN,
746 &hp_wmi_rfkill_ops,
747 (void *) HPWMI_WWAN);
748 if (!wwan_rfkill) {
749 err = -ENOMEM;
750 goto register_wwan_error;
751 }
752 rfkill_init_sw_state(wwan_rfkill,
753 hp_wmi_get_sw_state(HPWMI_WWAN));
754 rfkill_set_hw_state(wwan_rfkill,
755 hp_wmi_get_hw_state(HPWMI_WWAN));
756 err = rfkill_register(wwan_rfkill);
757 if (err)
758 goto register_wwan_error;
759 }
760
761 return 0;
762
763register_wwan_error:
764 rfkill_destroy(wwan_rfkill);
765 wwan_rfkill = NULL;
766 if (bluetooth_rfkill)
767 rfkill_unregister(bluetooth_rfkill);
768register_bluetooth_error:
769 rfkill_destroy(bluetooth_rfkill);
770 bluetooth_rfkill = NULL;
771 if (wifi_rfkill)
772 rfkill_unregister(wifi_rfkill);
773register_wifi_error:
774 rfkill_destroy(wifi_rfkill);
775 wifi_rfkill = NULL;
776 return err;
777}
778
779static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
780{
781 struct bios_rfkill2_state state;
782 int err, i;
783
784 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
785 sizeof(state), sizeof(state));
786 if (err)
787 return err < 0 ? err : -EINVAL;
788
789 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
790 pr_warn("unable to parse 0x1b query output\n");
791 return -EINVAL;
792 }
793
794 for (i = 0; i < state.count; i++) {
795 struct rfkill *rfkill;
796 enum rfkill_type type;
797 char *name;
798 switch (state.device[i].radio_type) {
799 case HPWMI_WIFI:
800 type = RFKILL_TYPE_WLAN;
801 name = "hp-wifi";
802 break;
803 case HPWMI_BLUETOOTH:
804 type = RFKILL_TYPE_BLUETOOTH;
805 name = "hp-bluetooth";
806 break;
807 case HPWMI_WWAN:
808 type = RFKILL_TYPE_WWAN;
809 name = "hp-wwan";
810 break;
811 case HPWMI_GPS:
812 type = RFKILL_TYPE_GPS;
813 name = "hp-gps";
814 break;
815 default:
816 pr_warn("unknown device type 0x%x\n",
817 state.device[i].radio_type);
818 continue;
819 }
820
821 if (!state.device[i].vendor_id) {
822 pr_warn("zero device %d while %d reported\n",
823 i, state.count);
824 continue;
825 }
826
827 rfkill = rfkill_alloc(name, &device->dev, type,
828 &hp_wmi_rfkill2_ops, (void *)(long)i);
829 if (!rfkill) {
830 err = -ENOMEM;
831 goto fail;
832 }
833
834 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
835 rfkill2[rfkill2_count].num = i;
836 rfkill2[rfkill2_count].rfkill = rfkill;
837
838 rfkill_init_sw_state(rfkill,
839 IS_SWBLOCKED(state.device[i].power));
840 rfkill_set_hw_state(rfkill,
841 IS_HWBLOCKED(state.device[i].power));
842
843 if (!(state.device[i].power & HPWMI_POWER_BIOS))
844 pr_info("device %s blocked by BIOS\n", name);
845
846 err = rfkill_register(rfkill);
847 if (err) {
848 rfkill_destroy(rfkill);
849 goto fail;
850 }
851
852 rfkill2_count++;
853 }
854
855 return 0;
856fail:
857 for (; rfkill2_count > 0; rfkill2_count--) {
858 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
859 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
860 }
861 return err;
862}
863
864static int __init hp_wmi_bios_setup(struct platform_device *device)
865{
866 /* clear detected rfkill devices */
867 wifi_rfkill = NULL;
868 bluetooth_rfkill = NULL;
869 wwan_rfkill = NULL;
870 rfkill2_count = 0;
871
872 if (hp_wmi_rfkill_setup(device))
873 hp_wmi_rfkill2_setup(device);
874
875 return 0;
876}
877
878static int __exit hp_wmi_bios_remove(struct platform_device *device)
879{
880 int i;
881
882 for (i = 0; i < rfkill2_count; i++) {
883 rfkill_unregister(rfkill2[i].rfkill);
884 rfkill_destroy(rfkill2[i].rfkill);
885 }
886
887 if (wifi_rfkill) {
888 rfkill_unregister(wifi_rfkill);
889 rfkill_destroy(wifi_rfkill);
890 }
891 if (bluetooth_rfkill) {
892 rfkill_unregister(bluetooth_rfkill);
893 rfkill_destroy(bluetooth_rfkill);
894 }
895 if (wwan_rfkill) {
896 rfkill_unregister(wwan_rfkill);
897 rfkill_destroy(wwan_rfkill);
898 }
899
900 return 0;
901}
902
903static int hp_wmi_resume_handler(struct device *device)
904{
905 /*
906 * Hardware state may have changed while suspended, so trigger
907 * input events for the current state. As this is a switch,
908 * the input layer will only actually pass it on if the state
909 * changed.
910 */
911 if (hp_wmi_input_dev) {
912 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
913 input_report_switch(hp_wmi_input_dev, SW_DOCK,
914 hp_wmi_hw_state(HPWMI_DOCK_MASK));
915 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
916 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
917 hp_wmi_hw_state(HPWMI_TABLET_MASK));
918 input_sync(hp_wmi_input_dev);
919 }
920
921 if (rfkill2_count)
922 hp_wmi_rfkill2_refresh();
923
924 if (wifi_rfkill)
925 rfkill_set_states(wifi_rfkill,
926 hp_wmi_get_sw_state(HPWMI_WIFI),
927 hp_wmi_get_hw_state(HPWMI_WIFI));
928 if (bluetooth_rfkill)
929 rfkill_set_states(bluetooth_rfkill,
930 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
931 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
932 if (wwan_rfkill)
933 rfkill_set_states(wwan_rfkill,
934 hp_wmi_get_sw_state(HPWMI_WWAN),
935 hp_wmi_get_hw_state(HPWMI_WWAN));
936
937 return 0;
938}
939
940static const struct dev_pm_ops hp_wmi_pm_ops = {
941 .resume = hp_wmi_resume_handler,
942 .restore = hp_wmi_resume_handler,
943};
944
945static struct platform_driver hp_wmi_driver = {
946 .driver = {
947 .name = "hp-wmi",
948 .pm = &hp_wmi_pm_ops,
949 .dev_groups = hp_wmi_groups,
950 },
951 .remove = __exit_p(hp_wmi_bios_remove),
952};
953
954static int __init hp_wmi_init(void)
955{
956 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
957 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
958 int err;
959
960 if (!bios_capable && !event_capable)
961 return -ENODEV;
962
963 if (event_capable) {
964 err = hp_wmi_input_setup();
965 if (err)
966 return err;
967 }
968
969 if (bios_capable) {
970 hp_wmi_platform_dev =
971 platform_device_register_simple("hp-wmi", -1, NULL, 0);
972 if (IS_ERR(hp_wmi_platform_dev)) {
973 err = PTR_ERR(hp_wmi_platform_dev);
974 goto err_destroy_input;
975 }
976
977 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
978 if (err)
979 goto err_unregister_device;
980 }
981
982 return 0;
983
984err_unregister_device:
985 platform_device_unregister(hp_wmi_platform_dev);
986err_destroy_input:
987 if (event_capable)
988 hp_wmi_input_destroy();
989
990 return err;
991}
992module_init(hp_wmi_init);
993
994static void __exit hp_wmi_exit(void)
995{
996 if (wmi_has_guid(HPWMI_EVENT_GUID))
997 hp_wmi_input_destroy();
998
999 if (hp_wmi_platform_dev) {
1000 platform_device_unregister(hp_wmi_platform_dev);
1001 platform_driver_unregister(&hp_wmi_driver);
1002 }
1003}
1004module_exit(hp_wmi_exit);