Version:  2.0.40 2.2.26 2.4.37 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7

Linux/drivers/platform/x86/hp-wmi.c

  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 
 41 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
 42 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
 43 MODULE_LICENSE("GPL");
 44 
 45 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
 46 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
 47 
 48 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
 49 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
 50 
 51 #define HPWMI_DISPLAY_QUERY 0x1
 52 #define HPWMI_HDDTEMP_QUERY 0x2
 53 #define HPWMI_ALS_QUERY 0x3
 54 #define HPWMI_HARDWARE_QUERY 0x4
 55 #define HPWMI_WIRELESS_QUERY 0x5
 56 #define HPWMI_BIOS_QUERY 0x9
 57 #define HPWMI_FEATURE_QUERY 0xb
 58 #define HPWMI_HOTKEY_QUERY 0xc
 59 #define HPWMI_FEATURE2_QUERY 0xd
 60 #define HPWMI_WIRELESS2_QUERY 0x1b
 61 #define HPWMI_POSTCODEERROR_QUERY 0x2a
 62 
 63 enum hp_wmi_radio {
 64         HPWMI_WIFI = 0,
 65         HPWMI_BLUETOOTH = 1,
 66         HPWMI_WWAN = 2,
 67         HPWMI_GPS = 3,
 68 };
 69 
 70 enum hp_wmi_event_ids {
 71         HPWMI_DOCK_EVENT = 1,
 72         HPWMI_PARK_HDD = 2,
 73         HPWMI_SMART_ADAPTER = 3,
 74         HPWMI_BEZEL_BUTTON = 4,
 75         HPWMI_WIRELESS = 5,
 76         HPWMI_CPU_BATTERY_THROTTLE = 6,
 77         HPWMI_LOCK_SWITCH = 7,
 78         HPWMI_LID_SWITCH = 8,
 79         HPWMI_SCREEN_ROTATION = 9,
 80         HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
 81         HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
 82         HPWMI_PROXIMITY_SENSOR = 0x0C,
 83         HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
 84         HPWMI_PEAKSHIFT_PERIOD = 0x0F,
 85         HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
 86 };
 87 
 88 struct bios_args {
 89         u32 signature;
 90         u32 command;
 91         u32 commandtype;
 92         u32 datasize;
 93         u32 data;
 94 };
 95 
 96 struct bios_return {
 97         u32 sigpass;
 98         u32 return_code;
 99 };
100 
101 enum hp_return_value {
102         HPWMI_RET_WRONG_SIGNATURE       = 0x02,
103         HPWMI_RET_UNKNOWN_COMMAND       = 0x03,
104         HPWMI_RET_UNKNOWN_CMDTYPE       = 0x04,
105         HPWMI_RET_INVALID_PARAMETERS    = 0x05,
106 };
107 
108 enum hp_wireless2_bits {
109         HPWMI_POWER_STATE       = 0x01,
110         HPWMI_POWER_SOFT        = 0x02,
111         HPWMI_POWER_BIOS        = 0x04,
112         HPWMI_POWER_HARD        = 0x08,
113 };
114 
115 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
116                          != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
117 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
118 
119 struct bios_rfkill2_device_state {
120         u8 radio_type;
121         u8 bus_type;
122         u16 vendor_id;
123         u16 product_id;
124         u16 subsys_vendor_id;
125         u16 subsys_product_id;
126         u8 rfkill_id;
127         u8 power;
128         u8 unknown[4];
129 };
130 
131 /* 7 devices fit into the 128 byte buffer */
132 #define HPWMI_MAX_RFKILL2_DEVICES       7
133 
134 struct bios_rfkill2_state {
135         u8 unknown[7];
136         u8 count;
137         u8 pad[8];
138         struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
139 };
140 
141 static const struct key_entry hp_wmi_keymap[] = {
142         { KE_KEY, 0x02,   { KEY_BRIGHTNESSUP } },
143         { KE_KEY, 0x03,   { KEY_BRIGHTNESSDOWN } },
144         { KE_KEY, 0x20e6, { KEY_PROG1 } },
145         { KE_KEY, 0x20e8, { KEY_MEDIA } },
146         { KE_KEY, 0x2142, { KEY_MEDIA } },
147         { KE_KEY, 0x213b, { KEY_INFO } },
148         { KE_KEY, 0x2169, { KEY_ROTATE_DISPLAY } },
149         { KE_KEY, 0x216a, { KEY_SETUP } },
150         { KE_KEY, 0x231b, { KEY_HELP } },
151         { KE_END, 0 }
152 };
153 
154 static struct input_dev *hp_wmi_input_dev;
155 static struct platform_device *hp_wmi_platform_dev;
156 
157 static struct rfkill *wifi_rfkill;
158 static struct rfkill *bluetooth_rfkill;
159 static struct rfkill *wwan_rfkill;
160 
161 struct rfkill2_device {
162         u8 id;
163         int num;
164         struct rfkill *rfkill;
165 };
166 
167 static int rfkill2_count;
168 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
169 
170 /*
171  * hp_wmi_perform_query
172  *
173  * query:       The commandtype -> What should be queried
174  * write:       The command -> 0 read, 1 write, 3 ODM specific
175  * buffer:      Buffer used as input and/or output
176  * insize:      Size of input buffer
177  * outsize:     Size of output buffer
178  *
179  * returns zero on success
180  *         an HP WMI query specific error code (which is positive)
181  *         -EINVAL if the query was not successful at all
182  *         -EINVAL if the output buffer size exceeds buffersize
183  *
184  * Note: The buffersize must at least be the maximum of the input and output
185  *       size. E.g. Battery info query (0x7) is defined to have 1 byte input
186  *       and 128 byte output. The caller would do:
187  *       buffer = kzalloc(128, GFP_KERNEL);
188  *       ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
189  */
190 static int hp_wmi_perform_query(int query, int write, void *buffer,
191                                 int insize, int outsize)
192 {
193         struct bios_return *bios_return;
194         int actual_outsize;
195         union acpi_object *obj;
196         struct bios_args args = {
197                 .signature = 0x55434553,
198                 .command = write ? 0x2 : 0x1,
199                 .commandtype = query,
200                 .datasize = insize,
201                 .data = 0,
202         };
203         struct acpi_buffer input = { sizeof(struct bios_args), &args };
204         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
205         u32 rc;
206 
207         if (WARN_ON(insize > sizeof(args.data)))
208                 return -EINVAL;
209         memcpy(&args.data, buffer, insize);
210 
211         wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
212 
213         obj = output.pointer;
214 
215         if (!obj)
216                 return -EINVAL;
217         else if (obj->type != ACPI_TYPE_BUFFER) {
218                 kfree(obj);
219                 return -EINVAL;
220         }
221 
222         bios_return = (struct bios_return *)obj->buffer.pointer;
223         rc = bios_return->return_code;
224 
225         if (rc) {
226                 if (rc != HPWMI_RET_UNKNOWN_CMDTYPE)
227                         pr_warn("query 0x%x returned error 0x%x\n", query, rc);
228                 kfree(obj);
229                 return rc;
230         }
231 
232         if (!outsize) {
233                 /* ignore output data */
234                 kfree(obj);
235                 return 0;
236         }
237 
238         actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
239         memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
240         memset(buffer + actual_outsize, 0, outsize - actual_outsize);
241         kfree(obj);
242         return 0;
243 }
244 
245 static int hp_wmi_display_state(void)
246 {
247         int state = 0;
248         int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
249                                        sizeof(state), sizeof(state));
250         if (ret)
251                 return -EINVAL;
252         return state;
253 }
254 
255 static int hp_wmi_hddtemp_state(void)
256 {
257         int state = 0;
258         int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
259                                        sizeof(state), sizeof(state));
260         if (ret)
261                 return -EINVAL;
262         return state;
263 }
264 
265 static int hp_wmi_als_state(void)
266 {
267         int state = 0;
268         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
269                                        sizeof(state), sizeof(state));
270         if (ret)
271                 return -EINVAL;
272         return state;
273 }
274 
275 static int hp_wmi_dock_state(void)
276 {
277         int state = 0;
278         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
279                                        sizeof(state), sizeof(state));
280 
281         if (ret)
282                 return -EINVAL;
283 
284         return state & 0x1;
285 }
286 
287 static int hp_wmi_tablet_state(void)
288 {
289         int state = 0;
290         int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
291                                        sizeof(state), sizeof(state));
292         if (ret)
293                 return ret;
294 
295         return (state & 0x4) ? 1 : 0;
296 }
297 
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, 0, &state,
302                                        sizeof(state), sizeof(state));
303         if (!ret)
304                 return 1;
305 
306         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
307 }
308 
309 static int __init hp_wmi_bios_2009_later(void)
310 {
311         int state = 0;
312         int ret = hp_wmi_perform_query(HPWMI_FEATURE2_QUERY, 0, &state,
313                                        sizeof(state), sizeof(state));
314         if (!ret)
315                 return 1;
316 
317         return (ret == HPWMI_RET_UNKNOWN_CMDTYPE) ? 0 : -ENXIO;
318 }
319 
320 static int __init hp_wmi_enable_hotkeys(void)
321 {
322         int value = 0x6e;
323         int ret = hp_wmi_perform_query(HPWMI_BIOS_QUERY, 1, &value,
324                                        sizeof(value), 0);
325         if (ret)
326                 return -EINVAL;
327         return 0;
328 }
329 
330 static int hp_wmi_set_block(void *data, bool blocked)
331 {
332         enum hp_wmi_radio r = (enum hp_wmi_radio) data;
333         int query = BIT(r + 8) | ((!blocked) << r);
334         int ret;
335 
336         ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
337                                    &query, sizeof(query), 0);
338         if (ret)
339                 return -EINVAL;
340         return 0;
341 }
342 
343 static const struct rfkill_ops hp_wmi_rfkill_ops = {
344         .set_block = hp_wmi_set_block,
345 };
346 
347 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
348 {
349         int wireless = 0;
350         int mask;
351         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
352                              &wireless, sizeof(wireless),
353                              sizeof(wireless));
354         /* TBD: Pass error */
355 
356         mask = 0x200 << (r * 8);
357 
358         if (wireless & mask)
359                 return false;
360         else
361                 return true;
362 }
363 
364 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
365 {
366         int wireless = 0;
367         int mask;
368         hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
369                              &wireless, sizeof(wireless),
370                              sizeof(wireless));
371         /* TBD: Pass error */
372 
373         mask = 0x800 << (r * 8);
374 
375         if (wireless & mask)
376                 return false;
377         else
378                 return true;
379 }
380 
381 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
382 {
383         int rfkill_id = (int)(long)data;
384         char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
385 
386         if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
387                                    buffer, sizeof(buffer), 0))
388                 return -EINVAL;
389         return 0;
390 }
391 
392 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
393         .set_block = hp_wmi_rfkill2_set_block,
394 };
395 
396 static int hp_wmi_rfkill2_refresh(void)
397 {
398         int err, i;
399         struct bios_rfkill2_state state;
400 
401         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
402                                    0, sizeof(state));
403         if (err)
404                 return err;
405 
406         for (i = 0; i < rfkill2_count; i++) {
407                 int num = rfkill2[i].num;
408                 struct bios_rfkill2_device_state *devstate;
409                 devstate = &state.device[num];
410 
411                 if (num >= state.count ||
412                     devstate->rfkill_id != rfkill2[i].id) {
413                         pr_warn("power configuration of the wireless devices unexpectedly changed\n");
414                         continue;
415                 }
416 
417                 rfkill_set_states(rfkill2[i].rfkill,
418                                   IS_SWBLOCKED(devstate->power),
419                                   IS_HWBLOCKED(devstate->power));
420         }
421 
422         return 0;
423 }
424 
425 static int hp_wmi_post_code_state(void)
426 {
427         int state = 0;
428         int ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 0, &state,
429                                        sizeof(state), sizeof(state));
430         if (ret)
431                 return -EINVAL;
432         return state;
433 }
434 
435 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
436                             char *buf)
437 {
438         int value = hp_wmi_display_state();
439         if (value < 0)
440                 return -EINVAL;
441         return sprintf(buf, "%d\n", value);
442 }
443 
444 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
445                             char *buf)
446 {
447         int value = hp_wmi_hddtemp_state();
448         if (value < 0)
449                 return -EINVAL;
450         return sprintf(buf, "%d\n", value);
451 }
452 
453 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
454                         char *buf)
455 {
456         int value = hp_wmi_als_state();
457         if (value < 0)
458                 return -EINVAL;
459         return sprintf(buf, "%d\n", value);
460 }
461 
462 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
463                          char *buf)
464 {
465         int value = hp_wmi_dock_state();
466         if (value < 0)
467                 return -EINVAL;
468         return sprintf(buf, "%d\n", value);
469 }
470 
471 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
472                          char *buf)
473 {
474         int value = hp_wmi_tablet_state();
475         if (value < 0)
476                 return -EINVAL;
477         return sprintf(buf, "%d\n", value);
478 }
479 
480 static ssize_t show_postcode(struct device *dev, struct device_attribute *attr,
481                          char *buf)
482 {
483         /* Get the POST error code of previous boot failure. */
484         int value = hp_wmi_post_code_state();
485         if (value < 0)
486                 return -EINVAL;
487         return sprintf(buf, "0x%x\n", value);
488 }
489 
490 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
491                        const char *buf, size_t count)
492 {
493         u32 tmp = simple_strtoul(buf, NULL, 10);
494         int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
495                                        sizeof(tmp), sizeof(tmp));
496         if (ret)
497                 return -EINVAL;
498 
499         return count;
500 }
501 
502 static ssize_t set_postcode(struct device *dev, struct device_attribute *attr,
503                        const char *buf, size_t count)
504 {
505         int ret;
506         u32 tmp;
507         long unsigned int tmp2;
508 
509         ret = kstrtoul(buf, 10, &tmp2);
510         if (ret || tmp2 != 1)
511                 return -EINVAL;
512 
513         /* Clear the POST error code. It is kept until until cleared. */
514         tmp = (u32) tmp2;
515         ret = hp_wmi_perform_query(HPWMI_POSTCODEERROR_QUERY, 1, &tmp,
516                                        sizeof(tmp), sizeof(tmp));
517         if (ret)
518                 return -EINVAL;
519 
520         return count;
521 }
522 
523 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
524 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
525 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
526 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
527 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
528 static DEVICE_ATTR(postcode, S_IRUGO | S_IWUSR, show_postcode, set_postcode);
529 
530 static void hp_wmi_notify(u32 value, void *context)
531 {
532         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
533         union acpi_object *obj;
534         u32 event_id, event_data;
535         int key_code = 0, ret;
536         u32 *location;
537         acpi_status status;
538 
539         status = wmi_get_event_data(value, &response);
540         if (status != AE_OK) {
541                 pr_info("bad event status 0x%x\n", status);
542                 return;
543         }
544 
545         obj = (union acpi_object *)response.pointer;
546 
547         if (!obj)
548                 return;
549         if (obj->type != ACPI_TYPE_BUFFER) {
550                 pr_info("Unknown response received %d\n", obj->type);
551                 kfree(obj);
552                 return;
553         }
554 
555         /*
556          * Depending on ACPI version the concatenation of id and event data
557          * inside _WED function will result in a 8 or 16 byte buffer.
558          */
559         location = (u32 *)obj->buffer.pointer;
560         if (obj->buffer.length == 8) {
561                 event_id = *location;
562                 event_data = *(location + 1);
563         } else if (obj->buffer.length == 16) {
564                 event_id = *location;
565                 event_data = *(location + 2);
566         } else {
567                 pr_info("Unknown buffer length %d\n", obj->buffer.length);
568                 kfree(obj);
569                 return;
570         }
571         kfree(obj);
572 
573         switch (event_id) {
574         case HPWMI_DOCK_EVENT:
575                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
576                                     hp_wmi_dock_state());
577                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
578                                     hp_wmi_tablet_state());
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                 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
587                                            &key_code,
588                                            sizeof(key_code),
589                                            sizeof(key_code));
590                 if (ret)
591                         break;
592 
593                 if (!sparse_keymap_report_event(hp_wmi_input_dev,
594                                                 key_code, 1, true))
595                         pr_info("Unknown key code - 0x%x\n", key_code);
596                 break;
597         case HPWMI_WIRELESS:
598                 if (rfkill2_count) {
599                         hp_wmi_rfkill2_refresh();
600                         break;
601                 }
602 
603                 if (wifi_rfkill)
604                         rfkill_set_states(wifi_rfkill,
605                                           hp_wmi_get_sw_state(HPWMI_WIFI),
606                                           hp_wmi_get_hw_state(HPWMI_WIFI));
607                 if (bluetooth_rfkill)
608                         rfkill_set_states(bluetooth_rfkill,
609                                           hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
610                                           hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
611                 if (wwan_rfkill)
612                         rfkill_set_states(wwan_rfkill,
613                                           hp_wmi_get_sw_state(HPWMI_WWAN),
614                                           hp_wmi_get_hw_state(HPWMI_WWAN));
615                 break;
616         case HPWMI_CPU_BATTERY_THROTTLE:
617                 pr_info("Unimplemented CPU throttle because of 3 Cell battery event detected\n");
618                 break;
619         case HPWMI_LOCK_SWITCH:
620                 break;
621         case HPWMI_LID_SWITCH:
622                 break;
623         case HPWMI_SCREEN_ROTATION:
624                 break;
625         case HPWMI_COOLSENSE_SYSTEM_MOBILE:
626                 break;
627         case HPWMI_COOLSENSE_SYSTEM_HOT:
628                 break;
629         case HPWMI_PROXIMITY_SENSOR:
630                 break;
631         case HPWMI_BACKLIT_KB_BRIGHTNESS:
632                 break;
633         case HPWMI_PEAKSHIFT_PERIOD:
634                 break;
635         case HPWMI_BATTERY_CHARGE_PERIOD:
636                 break;
637         default:
638                 pr_info("Unknown event_id - %d - 0x%x\n", event_id, event_data);
639                 break;
640         }
641 }
642 
643 static int __init hp_wmi_input_setup(void)
644 {
645         acpi_status status;
646         int err;
647 
648         hp_wmi_input_dev = input_allocate_device();
649         if (!hp_wmi_input_dev)
650                 return -ENOMEM;
651 
652         hp_wmi_input_dev->name = "HP WMI hotkeys";
653         hp_wmi_input_dev->phys = "wmi/input0";
654         hp_wmi_input_dev->id.bustype = BUS_HOST;
655 
656         __set_bit(EV_SW, hp_wmi_input_dev->evbit);
657         __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
658         __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
659 
660         err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
661         if (err)
662                 goto err_free_dev;
663 
664         /* Set initial hardware state */
665         input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
666         input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
667                             hp_wmi_tablet_state());
668         input_sync(hp_wmi_input_dev);
669 
670         if (!hp_wmi_bios_2009_later() && hp_wmi_bios_2008_later())
671                 hp_wmi_enable_hotkeys();
672 
673         status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
674         if (ACPI_FAILURE(status)) {
675                 err = -EIO;
676                 goto err_free_keymap;
677         }
678 
679         err = input_register_device(hp_wmi_input_dev);
680         if (err)
681                 goto err_uninstall_notifier;
682 
683         return 0;
684 
685  err_uninstall_notifier:
686         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
687  err_free_keymap:
688         sparse_keymap_free(hp_wmi_input_dev);
689  err_free_dev:
690         input_free_device(hp_wmi_input_dev);
691         return err;
692 }
693 
694 static void hp_wmi_input_destroy(void)
695 {
696         wmi_remove_notify_handler(HPWMI_EVENT_GUID);
697         sparse_keymap_free(hp_wmi_input_dev);
698         input_unregister_device(hp_wmi_input_dev);
699 }
700 
701 static void cleanup_sysfs(struct platform_device *device)
702 {
703         device_remove_file(&device->dev, &dev_attr_display);
704         device_remove_file(&device->dev, &dev_attr_hddtemp);
705         device_remove_file(&device->dev, &dev_attr_als);
706         device_remove_file(&device->dev, &dev_attr_dock);
707         device_remove_file(&device->dev, &dev_attr_tablet);
708         device_remove_file(&device->dev, &dev_attr_postcode);
709 }
710 
711 static int __init hp_wmi_rfkill_setup(struct platform_device *device)
712 {
713         int err;
714         int wireless = 0;
715 
716         err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
717                                    sizeof(wireless), sizeof(wireless));
718         if (err)
719                 return err;
720 
721         if (wireless & 0x1) {
722                 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
723                                            RFKILL_TYPE_WLAN,
724                                            &hp_wmi_rfkill_ops,
725                                            (void *) HPWMI_WIFI);
726                 if (!wifi_rfkill)
727                         return -ENOMEM;
728                 rfkill_init_sw_state(wifi_rfkill,
729                                      hp_wmi_get_sw_state(HPWMI_WIFI));
730                 rfkill_set_hw_state(wifi_rfkill,
731                                     hp_wmi_get_hw_state(HPWMI_WIFI));
732                 err = rfkill_register(wifi_rfkill);
733                 if (err)
734                         goto register_wifi_error;
735         }
736 
737         if (wireless & 0x2) {
738                 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
739                                                 RFKILL_TYPE_BLUETOOTH,
740                                                 &hp_wmi_rfkill_ops,
741                                                 (void *) HPWMI_BLUETOOTH);
742                 if (!bluetooth_rfkill) {
743                         err = -ENOMEM;
744                         goto register_bluetooth_error;
745                 }
746                 rfkill_init_sw_state(bluetooth_rfkill,
747                                      hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
748                 rfkill_set_hw_state(bluetooth_rfkill,
749                                     hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
750                 err = rfkill_register(bluetooth_rfkill);
751                 if (err)
752                         goto register_bluetooth_error;
753         }
754 
755         if (wireless & 0x4) {
756                 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
757                                            RFKILL_TYPE_WWAN,
758                                            &hp_wmi_rfkill_ops,
759                                            (void *) HPWMI_WWAN);
760                 if (!wwan_rfkill) {
761                         err = -ENOMEM;
762                         goto register_wwan_error;
763                 }
764                 rfkill_init_sw_state(wwan_rfkill,
765                                      hp_wmi_get_sw_state(HPWMI_WWAN));
766                 rfkill_set_hw_state(wwan_rfkill,
767                                     hp_wmi_get_hw_state(HPWMI_WWAN));
768                 err = rfkill_register(wwan_rfkill);
769                 if (err)
770                         goto register_wwan_error;
771         }
772 
773         return 0;
774 
775 register_wwan_error:
776         rfkill_destroy(wwan_rfkill);
777         wwan_rfkill = NULL;
778         if (bluetooth_rfkill)
779                 rfkill_unregister(bluetooth_rfkill);
780 register_bluetooth_error:
781         rfkill_destroy(bluetooth_rfkill);
782         bluetooth_rfkill = NULL;
783         if (wifi_rfkill)
784                 rfkill_unregister(wifi_rfkill);
785 register_wifi_error:
786         rfkill_destroy(wifi_rfkill);
787         wifi_rfkill = NULL;
788         return err;
789 }
790 
791 static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
792 {
793         int err, i;
794         struct bios_rfkill2_state state;
795         err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
796                                    0, sizeof(state));
797         if (err)
798                 return err;
799 
800         if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
801                 pr_warn("unable to parse 0x1b query output\n");
802                 return -EINVAL;
803         }
804 
805         for (i = 0; i < state.count; i++) {
806                 struct rfkill *rfkill;
807                 enum rfkill_type type;
808                 char *name;
809                 switch (state.device[i].radio_type) {
810                 case HPWMI_WIFI:
811                         type = RFKILL_TYPE_WLAN;
812                         name = "hp-wifi";
813                         break;
814                 case HPWMI_BLUETOOTH:
815                         type = RFKILL_TYPE_BLUETOOTH;
816                         name = "hp-bluetooth";
817                         break;
818                 case HPWMI_WWAN:
819                         type = RFKILL_TYPE_WWAN;
820                         name = "hp-wwan";
821                         break;
822                 case HPWMI_GPS:
823                         type = RFKILL_TYPE_GPS;
824                         name = "hp-gps";
825                         break;
826                 default:
827                         pr_warn("unknown device type 0x%x\n",
828                                 state.device[i].radio_type);
829                         continue;
830                 }
831 
832                 if (!state.device[i].vendor_id) {
833                         pr_warn("zero device %d while %d reported\n",
834                                 i, state.count);
835                         continue;
836                 }
837 
838                 rfkill = rfkill_alloc(name, &device->dev, type,
839                                       &hp_wmi_rfkill2_ops, (void *)(long)i);
840                 if (!rfkill) {
841                         err = -ENOMEM;
842                         goto fail;
843                 }
844 
845                 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
846                 rfkill2[rfkill2_count].num = i;
847                 rfkill2[rfkill2_count].rfkill = rfkill;
848 
849                 rfkill_init_sw_state(rfkill,
850                                      IS_SWBLOCKED(state.device[i].power));
851                 rfkill_set_hw_state(rfkill,
852                                     IS_HWBLOCKED(state.device[i].power));
853 
854                 if (!(state.device[i].power & HPWMI_POWER_BIOS))
855                         pr_info("device %s blocked by BIOS\n", name);
856 
857                 err = rfkill_register(rfkill);
858                 if (err) {
859                         rfkill_destroy(rfkill);
860                         goto fail;
861                 }
862 
863                 rfkill2_count++;
864         }
865 
866         return 0;
867 fail:
868         for (; rfkill2_count > 0; rfkill2_count--) {
869                 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
870                 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
871         }
872         return err;
873 }
874 
875 static int __init hp_wmi_bios_setup(struct platform_device *device)
876 {
877         int err;
878 
879         /* clear detected rfkill devices */
880         wifi_rfkill = NULL;
881         bluetooth_rfkill = NULL;
882         wwan_rfkill = NULL;
883         rfkill2_count = 0;
884 
885         if (hp_wmi_bios_2009_later() || hp_wmi_rfkill_setup(device))
886                 hp_wmi_rfkill2_setup(device);
887 
888         err = device_create_file(&device->dev, &dev_attr_display);
889         if (err)
890                 goto add_sysfs_error;
891         err = device_create_file(&device->dev, &dev_attr_hddtemp);
892         if (err)
893                 goto add_sysfs_error;
894         err = device_create_file(&device->dev, &dev_attr_als);
895         if (err)
896                 goto add_sysfs_error;
897         err = device_create_file(&device->dev, &dev_attr_dock);
898         if (err)
899                 goto add_sysfs_error;
900         err = device_create_file(&device->dev, &dev_attr_tablet);
901         if (err)
902                 goto add_sysfs_error;
903         err = device_create_file(&device->dev, &dev_attr_postcode);
904         if (err)
905                 goto add_sysfs_error;
906         return 0;
907 
908 add_sysfs_error:
909         cleanup_sysfs(device);
910         return err;
911 }
912 
913 static int __exit hp_wmi_bios_remove(struct platform_device *device)
914 {
915         int i;
916         cleanup_sysfs(device);
917 
918         for (i = 0; i < rfkill2_count; i++) {
919                 rfkill_unregister(rfkill2[i].rfkill);
920                 rfkill_destroy(rfkill2[i].rfkill);
921         }
922 
923         if (wifi_rfkill) {
924                 rfkill_unregister(wifi_rfkill);
925                 rfkill_destroy(wifi_rfkill);
926         }
927         if (bluetooth_rfkill) {
928                 rfkill_unregister(bluetooth_rfkill);
929                 rfkill_destroy(bluetooth_rfkill);
930         }
931         if (wwan_rfkill) {
932                 rfkill_unregister(wwan_rfkill);
933                 rfkill_destroy(wwan_rfkill);
934         }
935 
936         return 0;
937 }
938 
939 static int hp_wmi_resume_handler(struct device *device)
940 {
941         /*
942          * Hardware state may have changed while suspended, so trigger
943          * input events for the current state. As this is a switch,
944          * the input layer will only actually pass it on if the state
945          * changed.
946          */
947         if (hp_wmi_input_dev) {
948                 input_report_switch(hp_wmi_input_dev, SW_DOCK,
949                                     hp_wmi_dock_state());
950                 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
951                                     hp_wmi_tablet_state());
952                 input_sync(hp_wmi_input_dev);
953         }
954 
955         if (rfkill2_count)
956                 hp_wmi_rfkill2_refresh();
957 
958         if (wifi_rfkill)
959                 rfkill_set_states(wifi_rfkill,
960                                   hp_wmi_get_sw_state(HPWMI_WIFI),
961                                   hp_wmi_get_hw_state(HPWMI_WIFI));
962         if (bluetooth_rfkill)
963                 rfkill_set_states(bluetooth_rfkill,
964                                   hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
965                                   hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
966         if (wwan_rfkill)
967                 rfkill_set_states(wwan_rfkill,
968                                   hp_wmi_get_sw_state(HPWMI_WWAN),
969                                   hp_wmi_get_hw_state(HPWMI_WWAN));
970 
971         return 0;
972 }
973 
974 static const struct dev_pm_ops hp_wmi_pm_ops = {
975         .resume  = hp_wmi_resume_handler,
976         .restore  = hp_wmi_resume_handler,
977 };
978 
979 static struct platform_driver hp_wmi_driver = {
980         .driver = {
981                 .name = "hp-wmi",
982                 .pm = &hp_wmi_pm_ops,
983         },
984         .remove = __exit_p(hp_wmi_bios_remove),
985 };
986 
987 static int __init hp_wmi_init(void)
988 {
989         int err;
990         int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
991         int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
992 
993         if (!bios_capable && !event_capable)
994                 return -ENODEV;
995 
996         if (event_capable) {
997                 err = hp_wmi_input_setup();
998                 if (err)
999                         return err;
1000         }
1001 
1002         if (bios_capable) {
1003                 hp_wmi_platform_dev =
1004                         platform_device_register_simple("hp-wmi", -1, NULL, 0);
1005                 if (IS_ERR(hp_wmi_platform_dev)) {
1006                         err = PTR_ERR(hp_wmi_platform_dev);
1007                         goto err_destroy_input;
1008                 }
1009 
1010                 err = platform_driver_probe(&hp_wmi_driver, hp_wmi_bios_setup);
1011                 if (err)
1012                         goto err_unregister_device;
1013         }
1014 
1015         return 0;
1016 
1017 err_unregister_device:
1018         platform_device_unregister(hp_wmi_platform_dev);
1019 err_destroy_input:
1020         if (event_capable)
1021                 hp_wmi_input_destroy();
1022 
1023         return err;
1024 }
1025 module_init(hp_wmi_init);
1026 
1027 static void __exit hp_wmi_exit(void)
1028 {
1029         if (wmi_has_guid(HPWMI_EVENT_GUID))
1030                 hp_wmi_input_destroy();
1031 
1032         if (hp_wmi_platform_dev) {
1033                 platform_device_unregister(hp_wmi_platform_dev);
1034                 platform_driver_unregister(&hp_wmi_driver);
1035         }
1036 }
1037 module_exit(hp_wmi_exit);
1038 

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