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
28 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
29 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
30 MODULE_LICENSE("GPL");
31
32 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
33 MODULE_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
38 enum hp_wmi_radio {
39 HPWMI_WIFI = 0x0,
40 HPWMI_BLUETOOTH = 0x1,
41 HPWMI_WWAN = 0x2,
42 HPWMI_GPS = 0x3,
43 };
44
45 enum 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
63 struct bios_args {
64 u32 signature;
65 u32 command;
66 u32 commandtype;
67 u32 datasize;
68 u32 data;
69 };
70
71 enum 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
86 enum hp_wmi_command {
87 HPWMI_READ = 0x01,
88 HPWMI_WRITE = 0x02,
89 HPWMI_ODM = 0x03,
90 };
91
92 enum hp_wmi_hardware_mask {
93 HPWMI_DOCK_MASK = 0x01,
94 HPWMI_TABLET_MASK = 0x04,
95 };
96
97 struct bios_return {
98 u32 sigpass;
99 u32 return_code;
100 };
101
102 enum 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
109 enum 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
120 struct 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
135 struct 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
142 static 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
155 static struct input_dev *hp_wmi_input_dev;
156 static struct platform_device *hp_wmi_platform_dev;
157
158 static struct rfkill *wifi_rfkill;
159 static struct rfkill *bluetooth_rfkill;
160 static struct rfkill *wwan_rfkill;
161
162 struct rfkill2_device {
163 u8 id;
164 int num;
165 struct rfkill *rfkill;
166 };
167
168 static int rfkill2_count;
169 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
170
171 /* map output size to the corresponding WMI method id */
encode_outsize_for_pvsz(int outsize)172 static 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 */
hp_wmi_perform_query(int query,enum hp_wmi_command command,void * buffer,int insize,int outsize)207 static 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
262 out_free:
263 kfree(obj);
264 return ret;
265 }
266
hp_wmi_read_int(int query)267 static 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
hp_wmi_hw_state(int mask)280 static 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
hp_wmi_bios_2008_later(void)290 static 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
hp_wmi_bios_2009_later(void)301 static 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
hp_wmi_enable_hotkeys(void)312 static 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
hp_wmi_set_block(void * data,bool blocked)321 static 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
333 static const struct rfkill_ops hp_wmi_rfkill_ops = {
334 .set_block = hp_wmi_set_block,
335 };
336
hp_wmi_get_sw_state(enum hp_wmi_radio r)337 static 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
hp_wmi_get_hw_state(enum hp_wmi_radio r)349 static 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
hp_wmi_rfkill2_set_block(void * data,bool blocked)361 static 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
373 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
374 .set_block = hp_wmi_rfkill2_set_block,
375 };
376
hp_wmi_rfkill2_refresh(void)377 static 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
display_show(struct device * dev,struct device_attribute * attr,char * buf)406 static 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
hddtemp_show(struct device * dev,struct device_attribute * attr,char * buf)415 static 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
als_show(struct device * dev,struct device_attribute * attr,char * buf)424 static 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
dock_show(struct device * dev,struct device_attribute * attr,char * buf)433 static 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
tablet_show(struct device * dev,struct device_attribute * attr,char * buf)442 static 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
postcode_show(struct device * dev,struct device_attribute * attr,char * buf)451 static 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
als_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)461 static 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
postcode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)473 static 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
491 out:
492 if (ret)
493 return ret < 0 ? ret : -EINVAL;
494
495 return count;
496 }
497
498 static DEVICE_ATTR_RO(display);
499 static DEVICE_ATTR_RO(hddtemp);
500 static DEVICE_ATTR_RW(als);
501 static DEVICE_ATTR_RO(dock);
502 static DEVICE_ATTR_RO(tablet);
503 static DEVICE_ATTR_RW(postcode);
504
505 static 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 };
514 ATTRIBUTE_GROUPS(hp_wmi);
515
hp_wmi_notify(u32 value,void * context)516 static 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
hp_wmi_input_setup(void)628 static 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
hp_wmi_input_destroy(void)686 static 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
hp_wmi_rfkill_setup(struct platform_device * device)692 static 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
759 register_wwan_error:
760 rfkill_destroy(wwan_rfkill);
761 wwan_rfkill = NULL;
762 if (bluetooth_rfkill)
763 rfkill_unregister(bluetooth_rfkill);
764 register_bluetooth_error:
765 rfkill_destroy(bluetooth_rfkill);
766 bluetooth_rfkill = NULL;
767 if (wifi_rfkill)
768 rfkill_unregister(wifi_rfkill);
769 register_wifi_error:
770 rfkill_destroy(wifi_rfkill);
771 wifi_rfkill = NULL;
772 return err;
773 }
774
hp_wmi_rfkill2_setup(struct platform_device * device)775 static 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;
852 fail:
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
hp_wmi_bios_setup(struct platform_device * device)860 static 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
hp_wmi_bios_remove(struct platform_device * device)874 static 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
hp_wmi_resume_handler(struct device * device)899 static 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
936 static const struct dev_pm_ops hp_wmi_pm_ops = {
937 .resume = hp_wmi_resume_handler,
938 .restore = hp_wmi_resume_handler,
939 };
940
941 static 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
hp_wmi_init(void)950 static 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
980 err_unregister_device:
981 platform_device_unregister(hp_wmi_platform_dev);
982 err_destroy_input:
983 if (event_capable)
984 hp_wmi_input_destroy();
985
986 return err;
987 }
988 module_init(hp_wmi_init);
989
hp_wmi_exit(void)990 static 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 }
1000 module_exit(hp_wmi_exit);
1001
