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 static int enable_tablet_mode_sw = -1;
36 module_param(enable_tablet_mode_sw, int, 0444);
37 MODULE_PARM_DESC(enable_tablet_mode_sw, "Enable SW_TABLET_MODE reporting (-1=auto, 0=no, 1=yes)");
38
39 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
40 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
41
42 enum hp_wmi_radio {
43 HPWMI_WIFI = 0x0,
44 HPWMI_BLUETOOTH = 0x1,
45 HPWMI_WWAN = 0x2,
46 HPWMI_GPS = 0x3,
47 };
48
49 enum hp_wmi_event_ids {
50 HPWMI_DOCK_EVENT = 0x01,
51 HPWMI_PARK_HDD = 0x02,
52 HPWMI_SMART_ADAPTER = 0x03,
53 HPWMI_BEZEL_BUTTON = 0x04,
54 HPWMI_WIRELESS = 0x05,
55 HPWMI_CPU_BATTERY_THROTTLE = 0x06,
56 HPWMI_LOCK_SWITCH = 0x07,
57 HPWMI_LID_SWITCH = 0x08,
58 HPWMI_SCREEN_ROTATION = 0x09,
59 HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
60 HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
61 HPWMI_PROXIMITY_SENSOR = 0x0C,
62 HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
63 HPWMI_PEAKSHIFT_PERIOD = 0x0F,
64 HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
65 HPWMI_SANITIZATION_MODE = 0x17,
66 HPWMI_SMART_EXPERIENCE_APP = 0x21,
67 };
68
69 struct bios_args {
70 u32 signature;
71 u32 command;
72 u32 commandtype;
73 u32 datasize;
74 u8 data[128];
75 };
76
77 enum hp_wmi_commandtype {
78 HPWMI_DISPLAY_QUERY = 0x01,
79 HPWMI_HDDTEMP_QUERY = 0x02,
80 HPWMI_ALS_QUERY = 0x03,
81 HPWMI_HARDWARE_QUERY = 0x04,
82 HPWMI_WIRELESS_QUERY = 0x05,
83 HPWMI_BATTERY_QUERY = 0x07,
84 HPWMI_BIOS_QUERY = 0x09,
85 HPWMI_FEATURE_QUERY = 0x0b,
86 HPWMI_HOTKEY_QUERY = 0x0c,
87 HPWMI_FEATURE2_QUERY = 0x0d,
88 HPWMI_WIRELESS2_QUERY = 0x1b,
89 HPWMI_POSTCODEERROR_QUERY = 0x2a,
90 HPWMI_THERMAL_POLICY_QUERY = 0x4c,
91 };
92
93 enum hp_wmi_command {
94 HPWMI_READ = 0x01,
95 HPWMI_WRITE = 0x02,
96 HPWMI_ODM = 0x03,
97 };
98
99 enum hp_wmi_hardware_mask {
100 HPWMI_DOCK_MASK = 0x01,
101 HPWMI_TABLET_MASK = 0x04,
102 };
103
104 struct bios_return {
105 u32 sigpass;
106 u32 return_code;
107 };
108
109 enum hp_return_value {
110 HPWMI_RET_WRONG_SIGNATURE = 0x02,
111 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
112 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
113 HPWMI_RET_INVALID_PARAMETERS = 0x05,
114 };
115
116 enum hp_wireless2_bits {
117 HPWMI_POWER_STATE = 0x01,
118 HPWMI_POWER_SOFT = 0x02,
119 HPWMI_POWER_BIOS = 0x04,
120 HPWMI_POWER_HARD = 0x08,
121 HPWMI_POWER_FW_OR_HW = HPWMI_POWER_BIOS | HPWMI_POWER_HARD,
122 };
123
124 #define IS_HWBLOCKED(x) ((x & HPWMI_POWER_FW_OR_HW) != HPWMI_POWER_FW_OR_HW)
125 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
126
127 struct bios_rfkill2_device_state {
128 u8 radio_type;
129 u8 bus_type;
130 u16 vendor_id;
131 u16 product_id;
132 u16 subsys_vendor_id;
133 u16 subsys_product_id;
134 u8 rfkill_id;
135 u8 power;
136 u8 unknown[4];
137 };
138
139 /* 7 devices fit into the 128 byte buffer */
140 #define HPWMI_MAX_RFKILL2_DEVICES 7
141
142 struct bios_rfkill2_state {
143 u8 unknown[7];
144 u8 count;
145 u8 pad[8];
146 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
147 };
148
149 static const struct key_entry hp_wmi_keymap[] = {
150 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
151 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
152 { KE_KEY, 0x20e6, { KEY_PROG1 } },
153 { KE_KEY, 0x20e8, { KEY_MEDIA } },
154 { KE_KEY, 0x2142, { KEY_MEDIA } },
155 { KE_KEY, 0x213b, { KEY_INFO } },
156 { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
157 { KE_KEY, 0x216a, { KEY_SETUP } },
158 { KE_KEY, 0x231b, { KEY_HELP } },
159 { KE_END, 0 }
160 };
161
162 static struct input_dev *hp_wmi_input_dev;
163 static struct platform_device *hp_wmi_platform_dev;
164
165 static struct rfkill *wifi_rfkill;
166 static struct rfkill *bluetooth_rfkill;
167 static struct rfkill *wwan_rfkill;
168
169 struct rfkill2_device {
170 u8 id;
171 int num;
172 struct rfkill *rfkill;
173 };
174
175 static int rfkill2_count;
176 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
177
178 /* map output size to the corresponding WMI method id */
encode_outsize_for_pvsz(int outsize)179 static inline int encode_outsize_for_pvsz(int outsize)
180 {
181 if (outsize > 4096)
182 return -EINVAL;
183 if (outsize > 1024)
184 return 5;
185 if (outsize > 128)
186 return 4;
187 if (outsize > 4)
188 return 3;
189 if (outsize > 0)
190 return 2;
191 return 1;
192 }
193
194 /*
195 * hp_wmi_perform_query
196 *
197 * query: The commandtype (enum hp_wmi_commandtype)
198 * write: The command (enum hp_wmi_command)
199 * buffer: Buffer used as input and/or output
200 * insize: Size of input buffer
201 * outsize: Size of output buffer
202 *
203 * returns zero on success
204 * an HP WMI query specific error code (which is positive)
205 * -EINVAL if the query was not successful at all
206 * -EINVAL if the output buffer size exceeds buffersize
207 *
208 * Note: The buffersize must at least be the maximum of the input and output
209 * size. E.g. Battery info query is defined to have 1 byte input
210 * and 128 byte output. The caller would do:
211 * buffer = kzalloc(128, GFP_KERNEL);
212 * ret = hp_wmi_perform_query(HPWMI_BATTERY_QUERY, HPWMI_READ, buffer, 1, 128)
213 */
hp_wmi_perform_query(int query, enum hp_wmi_command command, void *buffer, int insize, int outsize)214 static int hp_wmi_perform_query(int query, enum hp_wmi_command command,
215 void *buffer, int insize, int outsize)
216 {
217 int mid;
218 struct bios_return *bios_return;
219 int actual_outsize;
220 union acpi_object *obj;
221 struct bios_args args = {
222 .signature = 0x55434553,
223 .command = command,
224 .commandtype = query,
225 .datasize = insize,
226 .data = { 0 },
227 };
228 struct acpi_buffer input = { sizeof(struct bios_args), &args };
229 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
230 int ret = 0;
231
232 mid = encode_outsize_for_pvsz(outsize);
233 if (WARN_ON(mid < 0))
234 return mid;
235
236 if (WARN_ON(insize > sizeof(args.data)))
237 return -EINVAL;
238 memcpy(&args.data[0], buffer, insize);
239
240 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, mid, &input, &output);
241
242 obj = output.pointer;
243
244 if (!obj)
245 return -EINVAL;
246
247 if (obj->type != ACPI_TYPE_BUFFER) {
248 ret = -EINVAL;
249 goto out_free;
250 }
251
252 bios_return = (struct bios_return *)obj->buffer.pointer;
253 ret = bios_return->return_code;
254
255 if (ret) {
256 if (ret != HPWMI_RET_UNKNOWN_COMMAND &&
257 ret != HPWMI_RET_UNKNOWN_CMDTYPE)
258 pr_warn("query 0x%x returned error 0x%x\n", query, ret);
259 goto out_free;
260 }
261
262 /* Ignore output data of zero size */
263 if (!outsize)
264 goto out_free;
265
266 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
267 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
268 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
269
270 out_free:
271 kfree(obj);
272 return ret;
273 }
274
hp_wmi_read_int(int query)275 static int hp_wmi_read_int(int query)
276 {
277 int val = 0, ret;
278
279 ret = hp_wmi_perform_query(query, HPWMI_READ, &val,
280 sizeof(val), sizeof(val));
281
282 if (ret)
283 return ret < 0 ? ret : -EINVAL;
284
285 return val;
286 }
287
hp_wmi_hw_state(int mask)288 static int hp_wmi_hw_state(int mask)
289 {
290 int state = hp_wmi_read_int(HPWMI_HARDWARE_QUERY);
291
292 if (state < 0)
293 return state;
294
295 return !!(state & mask);
296 }
297
hp_wmi_bios_2008_later(void)298 static int __init hp_wmi_bios_2008_later(void)
299 {
300 int state = 0;
301 int ret = hp_wmi_perform_query(HPWMI_FEATURE_QUERY, HPWMI_READ, &state,
302 sizeof(state), sizeof(state));
303 if (!ret)
304 return 1;
305
306 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
307 }
308
hp_wmi_bios_2009_later(void)309 static int __init hp_wmi_bios_2009_later(void)
310 {
311 u8 state[128];
312 int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, HPWMI_READ, &state,
313 sizeof(state), sizeof(state));
314 if (!ret)
315 return 1;
316
317 return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
318 }
319
hp_wmi_enable_hotkeys(void)320 static int __init hp_wmi_enable_hotkeys(void)
321 {
322 int value = 0x6e;
323 int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, HPWMI_WRITE, &value,
324 sizeof(value), 0);
325
326 return ret <= 0 ? ret : -EINVAL;
327 }
328
hp_wmi_set_block(void *data, bool blocked)329 static int hp_wmi_set_block(void *data, bool blocked)
330 {
331 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
332 int query = BIT(r + 8) | ((!blocked) << r);
333 int ret;
334
335 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE,
336 &query, sizeof(query), 0);
337
338 return ret <= 0 ? ret : -EINVAL;
339 }
340
341 static const struct rfkill_ops hp_wmi_rfkill_ops = {
342 .set_block = hp_wmi_set_block,
343 };
344
hp_wmi_get_sw_state(enum hp_wmi_radio r)345 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
346 {
347 int mask = 0x200 << (r * 8);
348
349 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
350
351 /* TBD: Pass error */
352 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
353
354 return !(wireless & mask);
355 }
356
hp_wmi_get_hw_state(enum hp_wmi_radio r)357 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
358 {
359 int mask = 0x800 << (r * 8);
360
361 int wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
362
363 /* TBD: Pass error */
364 WARN_ONCE(wireless < 0, "error executing HPWMI_WIRELESS_QUERY");
365
366 return !(wireless & mask);
367 }
368
hp_wmi_rfkill2_set_block(void *data, bool blocked)369 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
370 {
371 int rfkill_id = (int)(long)data;
372 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
373 int ret;
374
375 ret = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_WRITE,
376 buffer, sizeof(buffer), 0);
377
378 return ret <= 0 ? ret : -EINVAL;
379 }
380
381 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
382 .set_block = hp_wmi_rfkill2_set_block,
383 };
384
hp_wmi_rfkill2_refresh(void)385 static int hp_wmi_rfkill2_refresh(void)
386 {
387 struct bios_rfkill2_state state;
388 int err, i;
389
390 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
391 sizeof(state), sizeof(state));
392 if (err)
393 return err;
394
395 for (i = 0; i < rfkill2_count; i++) {
396 int num = rfkill2[i].num;
397 struct bios_rfkill2_device_state *devstate;
398 devstate = &state.device[num];
399
400 if (num >= state.count ||
401 devstate->rfkill_id != rfkill2[i].id) {
402 pr_warn("power configuration of the wireless devices unexpectedly changed\n");
403 continue;
404 }
405
406 rfkill_set_states(rfkill2[i].rfkill,
407 IS_SWBLOCKED(devstate->power),
408 IS_HWBLOCKED(devstate->power));
409 }
410
411 return 0;
412 }
413
display_show(struct device *dev, struct device_attribute *attr, char *buf)414 static ssize_t display_show(struct device *dev, struct device_attribute *attr,
415 char *buf)
416 {
417 int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
418 if (value < 0)
419 return value;
420 return sprintf(buf, "%d\n", value);
421 }
422
hddtemp_show(struct device *dev, struct device_attribute *attr, char *buf)423 static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
424 char *buf)
425 {
426 int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
427 if (value < 0)
428 return value;
429 return sprintf(buf, "%d\n", value);
430 }
431
als_show(struct device *dev, struct device_attribute *attr, char *buf)432 static ssize_t als_show(struct device *dev, struct device_attribute *attr,
433 char *buf)
434 {
435 int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
436 if (value < 0)
437 return value;
438 return sprintf(buf, "%d\n", value);
439 }
440
dock_show(struct device *dev, struct device_attribute *attr, char *buf)441 static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
442 char *buf)
443 {
444 int value = hp_wmi_hw_state(HPWMI_DOCK_MASK);
445 if (value < 0)
446 return value;
447 return sprintf(buf, "%d\n", value);
448 }
449
tablet_show(struct device *dev, struct device_attribute *attr, char *buf)450 static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
451 char *buf)
452 {
453 int value = hp_wmi_hw_state(HPWMI_TABLET_MASK);
454 if (value < 0)
455 return value;
456 return sprintf(buf, "%d\n", value);
457 }
458
postcode_show(struct device *dev, struct device_attribute *attr, char *buf)459 static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
460 char *buf)
461 {
462 /* Get the POST error code of previous boot failure. */
463 int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
464 if (value < 0)
465 return value;
466 return sprintf(buf, "0x%x\n", value);
467 }
468
als_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)469 static ssize_t als_store(struct device *dev, struct device_attribute *attr,
470 const char *buf, size_t count)
471 {
472 u32 tmp;
473 int ret;
474
475 ret = kstrtou32(buf, 10, &tmp);
476 if (ret)
477 return ret;
478
479 ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, HPWMI_WRITE, &tmp,
480 sizeof(tmp), sizeof(tmp));
481 if (ret)
482 return ret < 0 ? ret : -EINVAL;
483
484 return count;
485 }
486
postcode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)487 static ssize_t postcode_store(struct device *dev, struct device_attribute *attr,
488 const char *buf, size_t count)
489 {
490 u32 tmp = 1;
491 bool clear;
492 int ret;
493
494 ret = kstrtobool(buf, &clear);
495 if (ret)
496 return ret;
497
498 if (clear == false)
499 return -EINVAL;
500
501 /* Clear the POST error code. It is kept until until cleared. */
502 ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, HPWMI_WRITE, &tmp,
503 sizeof(tmp), sizeof(tmp));
504 if (ret)
505 return ret < 0 ? ret : -EINVAL;
506
507 return count;
508 }
509
510 static DEVICE_ATTR_RO(display);
511 static DEVICE_ATTR_RO(hddtemp);
512 static DEVICE_ATTR_RW(als);
513 static DEVICE_ATTR_RO(dock);
514 static DEVICE_ATTR_RO(tablet);
515 static DEVICE_ATTR_RW(postcode);
516
517 static struct attribute *hp_wmi_attrs[] = {
518 &dev_attr_display.attr,
519 &dev_attr_hddtemp.attr,
520 &dev_attr_als.attr,
521 &dev_attr_dock.attr,
522 &dev_attr_tablet.attr,
523 &dev_attr_postcode.attr,
524 NULL,
525 };
526 ATTRIBUTE_GROUPS(hp_wmi);
527
hp_wmi_notify(u32 value, void *context)528 static void hp_wmi_notify(u32 value, void *context)
529 {
530 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
531 u32 event_id, event_data;
532 union acpi_object *obj;
533 acpi_status status;
534 u32 *location;
535 int key_code;
536
537 status = wmi_get_event_data(value, &response);
538 if (status != AE_OK) {
539 pr_info("bad event status 0x%x\n", status);
540 return;
541 }
542
543 obj = (union acpi_object *)response.pointer;
544
545 if (!obj)
546 return;
547 if (obj->type != ACPI_TYPE_BUFFER) {
548 pr_info("Unknown response received %d\n", obj->type);
549 kfree(obj);
550 return;
551 }
552
553 /*
554 * Depending on ACPI version the concatenation of id and event data
555 * inside _WED function will result in a 8 or 16 byte buffer.
556 */
557 location = (u32 *)obj->buffer.pointer;
558 if (obj->buffer.length == 8) {
559 event_id = *location;
560 event_data = *(location + 1);
561 } else if (obj->buffer.length == 16) {
562 event_id = *location;
563 event_data = *(location + 2);
564 } else {
565 pr_info("Unknown buffer length %d\n", obj->buffer.length);
566 kfree(obj);
567 return;
568 }
569 kfree(obj);
570
571 switch (event_id) {
572 case HPWMI_DOCK_EVENT:
573 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
574 input_report_switch(hp_wmi_input_dev, SW_DOCK,
575 hp_wmi_hw_state(HPWMI_DOCK_MASK));
576 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
577 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
578 hp_wmi_hw_state(HPWMI_TABLET_MASK));
579 input_sync(hp_wmi_input_dev);
580 break;
581 case HPWMI_PARK_HDD:
582 break;
583 case HPWMI_SMART_ADAPTER:
584 break;
585 case HPWMI_BEZEL_BUTTON:
586 key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
587 if (key_code < 0)
588 break;
589
590 if (!sparse_keymap_report_event(hp_wmi_input_dev,
591 key_code, 1, true))
592 pr_info("Unknown key code - 0x%x\n", key_code);
593 break;
594 case HPWMI_WIRELESS:
595 if (rfkill2_count) {
596 hp_wmi_rfkill2_refresh();
597 break;
598 }
599
600 if (wifi_rfkill)
601 rfkill_set_states(wifi_rfkill,
602 hp_wmi_get_sw_state(HPWMI_WIFI),
603 hp_wmi_get_hw_state(HPWMI_WIFI));
604 if (bluetooth_rfkill)
605 rfkill_set_states(bluetooth_rfkill,
606 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
607 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
608 if (wwan_rfkill)
609 rfkill_set_states(wwan_rfkill,
610 hp_wmi_get_sw_state(HPWMI_WWAN),
611 hp_wmi_get_hw_state(HPWMI_WWAN));
612 break;
613 case HPWMI_CPU_BATTERY_THROTTLE:
614 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
615 break;
616 case HPWMI_LOCK_SWITCH:
617 break;
618 case HPWMI_LID_SWITCH:
619 break;
620 case HPWMI_SCREEN_ROTATION:
621 break;
622 case HPWMI_COOLSENSE_SYSTEM_MOBILE:
623 break;
624 case HPWMI_COOLSENSE_SYSTEM_HOT:
625 break;
626 case HPWMI_PROXIMITY_SENSOR:
627 break;
628 case HPWMI_BACKLIT_KB_BRIGHTNESS:
629 break;
630 case HPWMI_PEAKSHIFT_PERIOD:
631 break;
632 case HPWMI_BATTERY_CHARGE_PERIOD:
633 break;
634 case HPWMI_SANITIZATION_MODE:
635 break;
636 case HPWMI_SMART_EXPERIENCE_APP:
637 break;
638 default:
639 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
640 break;
641 }
642 }
643
hp_wmi_input_setup(void)644 static int __init hp_wmi_input_setup(void)
645 {
646 acpi_status status;
647 int err, val;
648
649 hp_wmi_input_dev = input_allocate_device();
650 if (!hp_wmi_input_dev)
651 return -ENOMEM;
652
653 hp_wmi_input_dev->name = "HP WMI hotkeys";
654 hp_wmi_input_dev->phys = "wmi/input0";
655 hp_wmi_input_dev->id.bustype = BUS_HOST;
656
657 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
658
659 /* Dock */
660 val = hp_wmi_hw_state(HPWMI_DOCK_MASK);
661 if (!(val < 0)) {
662 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
663 input_report_switch(hp_wmi_input_dev, SW_DOCK, val);
664 }
665
666 /* Tablet mode */
667 if (enable_tablet_mode_sw > 0) {
668 val = hp_wmi_hw_state(HPWMI_TABLET_MASK);
669 if (val >= 0) {
670 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
671 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE, val);
672 }
673 }
674
675 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
676 if (err)
677 goto err_free_dev;
678
679 /* Set initial hardware state */
680 input_sync(hp_wmi_input_dev);
681
682 if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
683 hp_wmi_enable_hotkeys();
684
685 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
686 if (ACPI_FAILURE(status)) {
687 err = -EIO;
688 goto err_free_dev;
689 }
690
691 err = input_register_device(hp_wmi_input_dev);
692 if (err)
693 goto err_uninstall_notifier;
694
695 return 0;
696
697 err_uninstall_notifier:
698 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
699 err_free_dev:
700 input_free_device(hp_wmi_input_dev);
701 return err;
702 }
703
hp_wmi_input_destroy(void)704 static void hp_wmi_input_destroy(void)
705 {
706 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
707 input_unregister_device(hp_wmi_input_dev);
708 }
709
hp_wmi_rfkill_setup(struct platform_device *device)710 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
711 {
712 int err, wireless;
713
714 wireless = hp_wmi_read_int(HPWMI_WIRELESS_QUERY);
715 if (wireless < 0)
716 return wireless;
717
718 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, HPWMI_WRITE, &wireless,
719 sizeof(wireless), 0);
720 if (err)
721 return err;
722
723 if (wireless & 0x1) {
724 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
725 RFKILL_TYPE_WLAN,
726 &hp_wmi_rfkill_ops,
727 (void *) HPWMI_WIFI);
728 if (!wifi_rfkill)
729 return -ENOMEM;
730 rfkill_init_sw_state(wifi_rfkill,
731 hp_wmi_get_sw_state(HPWMI_WIFI));
732 rfkill_set_hw_state(wifi_rfkill,
733 hp_wmi_get_hw_state(HPWMI_WIFI));
734 err = rfkill_register(wifi_rfkill);
735 if (err)
736 goto register_wifi_error;
737 }
738
739 if (wireless & 0x2) {
740 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
741 RFKILL_TYPE_BLUETOOTH,
742 &hp_wmi_rfkill_ops,
743 (void *) HPWMI_BLUETOOTH);
744 if (!bluetooth_rfkill) {
745 err = -ENOMEM;
746 goto register_bluetooth_error;
747 }
748 rfkill_init_sw_state(bluetooth_rfkill,
749 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
750 rfkill_set_hw_state(bluetooth_rfkill,
751 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
752 err = rfkill_register(bluetooth_rfkill);
753 if (err)
754 goto register_bluetooth_error;
755 }
756
757 if (wireless & 0x4) {
758 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
759 RFKILL_TYPE_WWAN,
760 &hp_wmi_rfkill_ops,
761 (void *) HPWMI_WWAN);
762 if (!wwan_rfkill) {
763 err = -ENOMEM;
764 goto register_wwan_error;
765 }
766 rfkill_init_sw_state(wwan_rfkill,
767 hp_wmi_get_sw_state(HPWMI_WWAN));
768 rfkill_set_hw_state(wwan_rfkill,
769 hp_wmi_get_hw_state(HPWMI_WWAN));
770 err = rfkill_register(wwan_rfkill);
771 if (err)
772 goto register_wwan_error;
773 }
774
775 return 0;
776
777 register_wwan_error:
778 rfkill_destroy(wwan_rfkill);
779 wwan_rfkill = NULL;
780 if (bluetooth_rfkill)
781 rfkill_unregister(bluetooth_rfkill);
782 register_bluetooth_error:
783 rfkill_destroy(bluetooth_rfkill);
784 bluetooth_rfkill = NULL;
785 if (wifi_rfkill)
786 rfkill_unregister(wifi_rfkill);
787 register_wifi_error:
788 rfkill_destroy(wifi_rfkill);
789 wifi_rfkill = NULL;
790 return err;
791 }
792
hp_wmi_rfkill2_setup(struct platform_device *device)793 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
794 {
795 struct bios_rfkill2_state state;
796 int err, i;
797
798 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, HPWMI_READ, &state,
799 sizeof(state), sizeof(state));
800 if (err)
801 return err < 0 ? err : -EINVAL;
802
803 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
804 pr_warn("unable to parse 0x1b query output\n");
805 return -EINVAL;
806 }
807
808 for (i = 0; i < state.count; i++) {
809 struct rfkill *rfkill;
810 enum rfkill_type type;
811 char *name;
812 switch (state.device[i].radio_type) {
813 case HPWMI_WIFI:
814 type = RFKILL_TYPE_WLAN;
815 name = "hp-wifi";
816 break;
817 case HPWMI_BLUETOOTH:
818 type = RFKILL_TYPE_BLUETOOTH;
819 name = "hp-bluetooth";
820 break;
821 case HPWMI_WWAN:
822 type = RFKILL_TYPE_WWAN;
823 name = "hp-wwan";
824 break;
825 case HPWMI_GPS:
826 type = RFKILL_TYPE_GPS;
827 name = "hp-gps";
828 break;
829 default:
830 pr_warn("unknown device type 0x%x\n",
831 state.device[i].radio_type);
832 continue;
833 }
834
835 if (!state.device[i].vendor_id) {
836 pr_warn("zero device %d while %d reported\n",
837 i, state.count);
838 continue;
839 }
840
841 rfkill = rfkill_alloc(name, &device->dev, type,
842 &hp_wmi_rfkill2_ops, (void *)(long)i);
843 if (!rfkill) {
844 err = -ENOMEM;
845 goto fail;
846 }
847
848 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
849 rfkill2[rfkill2_count].num = i;
850 rfkill2[rfkill2_count].rfkill = rfkill;
851
852 rfkill_init_sw_state(rfkill,
853 IS_SWBLOCKED(state.device[i].power));
854 rfkill_set_hw_state(rfkill,
855 IS_HWBLOCKED(state.device[i].power));
856
857 if (!(state.device[i].power & HPWMI_POWER_BIOS))
858 pr_info("device %s blocked by BIOS\n", name);
859
860 err = rfkill_register(rfkill);
861 if (err) {
862 rfkill_destroy(rfkill);
863 goto fail;
864 }
865
866 rfkill2_count++;
867 }
868
869 return 0;
870 fail:
871 for (; rfkill2_count > 0; rfkill2_count--) {
872 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
873 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
874 }
875 return err;
876 }
877
thermal_policy_setup(struct platform_device *device)878 static int thermal_policy_setup(struct platform_device *device)
879 {
880 int err, tp;
881
882 tp = hp_wmi_read_int(HPWMI_THERMAL_POLICY_QUERY);
883 if (tp < 0)
884 return tp;
885
886 /*
887 * call thermal policy write command to ensure that the firmware correctly
888 * sets the OEM variables for the DPTF
889 */
890 err = hp_wmi_perform_query(HPWMI_THERMAL_POLICY_QUERY, HPWMI_WRITE, &tp,
891 sizeof(tp), 0);
892 if (err)
893 return err;
894
895 return 0;
896 }
897
hp_wmi_bios_setup(struct platform_device *device)898 static int __init hp_wmi_bios_setup(struct platform_device *device)
899 {
900 /* clear detected rfkill devices */
901 wifi_rfkill = NULL;
902 bluetooth_rfkill = NULL;
903 wwan_rfkill = NULL;
904 rfkill2_count = 0;
905
906 /*
907 * In pre-2009 BIOS, command 1Bh return 0x4 to indicate that
908 * BIOS no longer controls the power for the wireless
909 * devices. All features supported by this command will no
910 * longer be supported.
911 */
912 if (!hp_wmi_bios_2009_later()) {
913 if (hp_wmi_rfkill_setup(device))
914 hp_wmi_rfkill2_setup(device);
915 }
916
917 thermal_policy_setup(device);
918
919 return 0;
920 }
921
hp_wmi_bios_remove(struct platform_device *device)922 static int __exit hp_wmi_bios_remove(struct platform_device *device)
923 {
924 int i;
925
926 for (i = 0; i < rfkill2_count; i++) {
927 rfkill_unregister(rfkill2[i].rfkill);
928 rfkill_destroy(rfkill2[i].rfkill);
929 }
930
931 if (wifi_rfkill) {
932 rfkill_unregister(wifi_rfkill);
933 rfkill_destroy(wifi_rfkill);
934 }
935 if (bluetooth_rfkill) {
936 rfkill_unregister(bluetooth_rfkill);
937 rfkill_destroy(bluetooth_rfkill);
938 }
939 if (wwan_rfkill) {
940 rfkill_unregister(wwan_rfkill);
941 rfkill_destroy(wwan_rfkill);
942 }
943
944 return 0;
945 }
946
hp_wmi_resume_handler(struct device *device)947 static int hp_wmi_resume_handler(struct device *device)
948 {
949 /*
950 * Hardware state may have changed while suspended, so trigger
951 * input events for the current state. As this is a switch,
952 * the input layer will only actually pass it on if the state
953 * changed.
954 */
955 if (hp_wmi_input_dev) {
956 if (test_bit(SW_DOCK, hp_wmi_input_dev->swbit))
957 input_report_switch(hp_wmi_input_dev, SW_DOCK,
958 hp_wmi_hw_state(HPWMI_DOCK_MASK));
959 if (test_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit))
960 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
961 hp_wmi_hw_state(HPWMI_TABLET_MASK));
962 input_sync(hp_wmi_input_dev);
963 }
964
965 if (rfkill2_count)
966 hp_wmi_rfkill2_refresh();
967
968 if (wifi_rfkill)
969 rfkill_set_states(wifi_rfkill,
970 hp_wmi_get_sw_state(HPWMI_WIFI),
971 hp_wmi_get_hw_state(HPWMI_WIFI));
972 if (bluetooth_rfkill)
973 rfkill_set_states(bluetooth_rfkill,
974 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
975 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
976 if (wwan_rfkill)
977 rfkill_set_states(wwan_rfkill,
978 hp_wmi_get_sw_state(HPWMI_WWAN),
979 hp_wmi_get_hw_state(HPWMI_WWAN));
980
981 return 0;
982 }
983
984 static const struct dev_pm_ops hp_wmi_pm_ops = {
985 .resume = hp_wmi_resume_handler,
986 .restore = hp_wmi_resume_handler,
987 };
988
989 static struct platform_driver hp_wmi_driver = {
990 .driver = {
991 .name = "hp-wmi",
992 .pm = &hp_wmi_pm_ops,
993 .dev_groups = hp_wmi_groups,
994 },
995 .remove = __exit_p(hp_wmi_bios_remove),
996 };
997
hp_wmi_init(void)998 static int __init hp_wmi_init(void)
999 {
1000 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
1001 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
1002 int err;
1003
1004 if (!bios_capable && !event_capable)
1005 return -ENODEV;
1006
1007 if (event_capable) {
1008 err = hp_wmi_input_setup();
1009 if (err)
1010 return err;
1011 }
1012
1013 if (bios_capable) {
1014 hp_wmi_platform_dev =
1015 platform_device_register_simple("hp-wmi", -1, NULL, 0);
1016 if (IS_ERR(hp_wmi_platform_dev)) {
1017 err = PTR_ERR(hp_wmi_platform_dev);
1018 goto err_destroy_input;
1019 }
1020
1021 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1022 if (err)
1023 goto err_unregister_device;
1024 }
1025
1026 return 0;
1027
1028 err_unregister_device:
1029 platform_device_unregister(hp_wmi_platform_dev);
1030 err_destroy_input:
1031 if (event_capable)
1032 hp_wmi_input_destroy();
1033
1034 return err;
1035 }
1036 module_init(hp_wmi_init);
1037
hp_wmi_exit(void)1038 static void __exit hp_wmi_exit(void)
1039 {
1040 if (wmi_has_guid(HPWMI_EVENT_GUID))
1041 hp_wmi_input_destroy();
1042
1043 if (hp_wmi_platform_dev) {
1044 platform_device_unregister(hp_wmi_platform_dev);
1045 platform_driver_unregister(&hp_wmi_driver);
1046 }
1047 }
1048 module_exit(hp_wmi_exit);
1049