drivers/hid/hid-sensor-hub.c

   1 /*
   2  * HID Sensors Driver
   3  * Copyright (c) 2012, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  */
  19 #include <linux/device.h>
  20 #include <linux/hid.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23 #include <linux/mfd/core.h>
  24 #include <linux/list.h>
  25 #include <linux/hid-sensor-ids.h>
  26 #include <linux/hid-sensor-hub.h>
  27 #include "hid-ids.h"
  28
  29 /**
  30  * struct sensor_hub_pending - Synchronous read pending information
  31  * @status:             Pending status true/false.
  32  * @ready:              Completion synchronization data.
  33  * @usage_id:           Usage id for physical device, E.g. Gyro usage id.
  34  * @attr_usage_id:      Usage Id of a field, E.g. X-AXIS for a gyro.
  35  * @raw_size:           Response size for a read request.
  36  * @raw_data:           Place holder for received response.
  37  */
  38 struct sensor_hub_pending {
  39         bool status;
  40         struct completion ready;
  41         u32 usage_id;
  42         u32 attr_usage_id;
  43         int raw_size;
  44         u8  *raw_data;
  45 };
  46
  47 /**
  48  * struct sensor_hub_data - Hold a instance data for a HID hub device
  49  * @hsdev:              Stored hid instance for current hub device.
  50  * @mutex:              Mutex to serialize synchronous request.
  51  * @lock:               Spin lock to protect pending request structure.
  52  * @pending:            Holds information of pending sync read request.
  53  * @dyn_callback_list:  Holds callback function
  54  * @dyn_callback_lock:  spin lock to protect callback list
  55  * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
  56  * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
  57  */
  58 struct sensor_hub_data {
  59         struct hid_sensor_hub_device *hsdev;
  60         struct mutex mutex;
  61         spinlock_t lock;
  62         struct sensor_hub_pending pending;
  63         struct list_head dyn_callback_list;
  64         spinlock_t dyn_callback_lock;
  65         struct mfd_cell *hid_sensor_hub_client_devs;
  66         int hid_sensor_client_cnt;
  67 };
  68
  69 /**
  70  * struct hid_sensor_hub_callbacks_list - Stores callback list
  71  * @list:               list head.
  72  * @usage_id:           usage id for a physical device.
  73  * @usage_callback:     Stores registered callback functions.
  74  * @priv:               Private data for a physical device.
  75  */
  76 struct hid_sensor_hub_callbacks_list {
  77         struct list_head list;
  78         u32 usage_id;
  79         struct hid_sensor_hub_callbacks *usage_callback;
  80         void *priv;
  81 };
  82
  83 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  84                                                 int dir)
  85 {
  86         struct hid_report *report;
  87
  88         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  89                 if (report->id == id)
  90                         return report;
  91         }
  92         hid_warn(hdev, "No report with id 0x%x found\n", id);
  93
  94         return NULL;
  95 }
  96
  97 static int sensor_hub_get_physical_device_count(
  98                                 struct hid_report_enum *report_enum)
  99 {
 100         struct hid_report *report;
 101         struct hid_field *field;
 102         int cnt = 0;
 103
 104         list_for_each_entry(report, &report_enum->report_list, list) {
 105                 field = report->field[0];
 106                 if (report->maxfield && field && field->physical)
 107                         cnt++;
 108         }
 109
 110         return cnt;
 111 }
 112
 113 static void sensor_hub_fill_attr_info(
 114                 struct hid_sensor_hub_attribute_info *info,
 115                 s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
 116 {
 117         info->index = index;
 118         info->report_id = report_id;
 119         info->units = units;
 120         info->unit_expo = unit_expo;
 121         info->size = size/8;
 122 }
 123
 124 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 125                                         struct hid_device *hdev,
 126                                         u32 usage_id, void **priv)
 127 {
 128         struct hid_sensor_hub_callbacks_list *callback;
 129         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 130
 131         spin_lock(&pdata->dyn_callback_lock);
 132         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 133                 if (callback->usage_id == usage_id) {
 134                         *priv = callback->priv;
 135                         spin_unlock(&pdata->dyn_callback_lock);
 136                         return callback->usage_callback;
 137                 }
 138         spin_unlock(&pdata->dyn_callback_lock);
 139
 140         return NULL;
 141 }
 142
 143 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 144                         u32 usage_id,
 145                         struct hid_sensor_hub_callbacks *usage_callback)
 146 {
 147         struct hid_sensor_hub_callbacks_list *callback;
 148         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 149
 150         spin_lock(&pdata->dyn_callback_lock);
 151         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 152                 if (callback->usage_id == usage_id) {
 153                         spin_unlock(&pdata->dyn_callback_lock);
 154                         return -EINVAL;
 155                 }
 156         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 157         if (!callback) {
 158                 spin_unlock(&pdata->dyn_callback_lock);
 159                 return -ENOMEM;
 160         }
 161         callback->usage_callback = usage_callback;
 162         callback->usage_id = usage_id;
 163         callback->priv = NULL;
 164         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 165         spin_unlock(&pdata->dyn_callback_lock);
 166
 167         return 0;
 168 }
 169 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 170
 171 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 172                                 u32 usage_id)
 173 {
 174         struct hid_sensor_hub_callbacks_list *callback;
 175         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 176
 177         spin_lock(&pdata->dyn_callback_lock);
 178         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 179                 if (callback->usage_id == usage_id) {
 180                         list_del(&callback->list);
 181                         kfree(callback);
 182                         break;
 183                 }
 184         spin_unlock(&pdata->dyn_callback_lock);
 185
 186         return 0;
 187 }
 188 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 189
 190 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 191                                 u32 field_index, s32 value)
 192 {
 193         struct hid_report *report;
 194         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 195         int ret = 0;
 196
 197         mutex_lock(&data->mutex);
 198         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 199         if (!report || (field_index >= report->maxfield)) {
 200                 ret = -EINVAL;
 201                 goto done_proc;
 202         }
 203         hid_set_field(report->field[field_index], 0, value);
 204         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 205         hid_hw_wait(hsdev->hdev);
 206
 207 done_proc:
 208         mutex_unlock(&data->mutex);
 209
 210         return ret;
 211 }
 212 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 213
 214 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 215                                 u32 field_index, s32 *value)
 216 {
 217         struct hid_report *report;
 218         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 219         int ret = 0;
 220
 221         mutex_lock(&data->mutex);
 222         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 223         if (!report || (field_index >= report->maxfield) ||
 224             report->field[field_index]->report_count < 1) {
 225                 ret = -EINVAL;
 226                 goto done_proc;
 227         }
 228         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 229         hid_hw_wait(hsdev->hdev);
 230         *value = report->field[field_index]->value[0];
 231
 232 done_proc:
 233         mutex_unlock(&data->mutex);
 234
 235         return ret;
 236 }
 237 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 238
 239
 240 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 241                                         u32 usage_id,
 242                                         u32 attr_usage_id, u32 report_id)
 243 {
 244         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 245         unsigned long flags;
 246         struct hid_report *report;
 247         int ret_val = 0;
 248
 249         mutex_lock(&data->mutex);
 250         memset(&data->pending, 0, sizeof(data->pending));
 251         init_completion(&data->pending.ready);
 252         data->pending.usage_id = usage_id;
 253         data->pending.attr_usage_id = attr_usage_id;
 254         data->pending.raw_size = 0;
 255
 256         spin_lock_irqsave(&data->lock, flags);
 257         data->pending.status = true;
 258         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 259         if (!report) {
 260                 spin_unlock_irqrestore(&data->lock, flags);
 261                 goto err_free;
 262         }
 263         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 264         spin_unlock_irqrestore(&data->lock, flags);
 265         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 266         switch (data->pending.raw_size) {
 267         case 1:
 268                 ret_val = *(u8 *)data->pending.raw_data;
 269                 break;
 270         case 2:
 271                 ret_val = *(u16 *)data->pending.raw_data;
 272                 break;
 273         case 4:
 274                 ret_val = *(u32 *)data->pending.raw_data;
 275                 break;
 276         default:
 277                 ret_val = 0;
 278         }
 279         kfree(data->pending.raw_data);
 280
 281 err_free:
 282         data->pending.status = false;
 283         mutex_unlock(&data->mutex);
 284
 285         return ret_val;
 286 }
 287 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 288
 289 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 290                                 u8 type,
 291                                 u32 usage_id,
 292                                 u32 attr_usage_id,
 293                                 struct hid_sensor_hub_attribute_info *info)
 294 {
 295         int ret = -1;
 296         int i, j;
 297         int collection_index = -1;
 298         struct hid_report *report;
 299         struct hid_field *field;
 300         struct hid_report_enum *report_enum;
 301         struct hid_device *hdev = hsdev->hdev;
 302
 303         /* Initialize with defaults */
 304         info->usage_id = usage_id;
 305         info->attrib_id = attr_usage_id;
 306         info->report_id = -1;
 307         info->index = -1;
 308         info->units = -1;
 309         info->unit_expo = -1;
 310
 311         for (i = 0; i < hdev->maxcollection; ++i) {
 312                 struct hid_collection *collection = &hdev->collection[i];
 313                 if (usage_id == collection->usage) {
 314                         collection_index = i;
 315                         break;
 316                 }
 317         }
 318         if (collection_index == -1)
 319                 goto err_ret;
 320
 321         report_enum = &hdev->report_enum[type];
 322         list_for_each_entry(report, &report_enum->report_list, list) {
 323                 for (i = 0; i < report->maxfield; ++i) {
 324                         field = report->field[i];
 325                         if (field->physical == usage_id &&
 326                                 field->logical == attr_usage_id) {
 327                                 sensor_hub_fill_attr_info(info, i, report->id,
 328                                         field->unit, field->unit_exponent,
 329                                         field->report_size);
 330                                 ret = 0;
 331                         } else {
 332                                 for (j = 0; j < field->maxusage; ++j) {
 333                                         if (field->usage[j].hid ==
 334                                         attr_usage_id &&
 335                                         field->usage[j].collection_index ==
 336                                         collection_index) {
 337                                                 sensor_hub_fill_attr_info(info,
 338                                                         i, report->id,
 339                                                         field->unit,
 340                                                         field->unit_exponent,
 341                                                         field->report_size);
 342                                                 ret = 0;
 343                                                 break;
 344                                         }
 345                                 }
 346                         }
 347                         if (ret == 0)
 348                                 break;
 349                 }
 350         }
 351
 352 err_ret:
 353         return ret;
 354 }
 355 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 356
 357 #ifdef CONFIG_PM
 358 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 359 {
 360         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 361         struct hid_sensor_hub_callbacks_list *callback;
 362
 363         hid_dbg(hdev, " sensor_hub_suspend\n");
 364         spin_lock(&pdata->dyn_callback_lock);
 365         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 366                 if (callback->usage_callback->suspend)
 367                         callback->usage_callback->suspend(
 368                                         pdata->hsdev, callback->priv);
 369         }
 370         spin_unlock(&pdata->dyn_callback_lock);
 371
 372         return 0;
 373 }
 374
 375 static int sensor_hub_resume(struct hid_device *hdev)
 376 {
 377         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 378         struct hid_sensor_hub_callbacks_list *callback;
 379
 380         hid_dbg(hdev, " sensor_hub_resume\n");
 381         spin_lock(&pdata->dyn_callback_lock);
 382         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 383                 if (callback->usage_callback->resume)
 384                         callback->usage_callback->resume(
 385                                         pdata->hsdev, callback->priv);
 386         }
 387         spin_unlock(&pdata->dyn_callback_lock);
 388
 389         return 0;
 390 }
 391
 392 static int sensor_hub_reset_resume(struct hid_device *hdev)
 393 {
 394         return 0;
 395 }
 396 #endif
 397
 398 /*
 399  * Handle raw report as sent by device
 400  */
 401 static int sensor_hub_raw_event(struct hid_device *hdev,
 402                 struct hid_report *report, u8 *raw_data, int size)
 403 {
 404         int i;
 405         u8 *ptr;
 406         int sz;
 407         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 408         unsigned long flags;
 409         struct hid_sensor_hub_callbacks *callback = NULL;
 410         struct hid_collection *collection = NULL;
 411         void *priv = NULL;
 412
 413         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 414                          report->id, size, report->type);
 415         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 416         if (report->type != HID_INPUT_REPORT)
 417                 return 1;
 418
 419         ptr = raw_data;
 420         ptr++; /* Skip report id */
 421
 422         spin_lock_irqsave(&pdata->lock, flags);
 423
 424         for (i = 0; i < report->maxfield; ++i) {
 425                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 426                                 i, report->field[i]->usage->collection_index,
 427                                 report->field[i]->usage->hid,
 428                                 report->field[i]->report_size/8);
 429
 430                 sz = report->field[i]->report_size/8;
 431                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 432                                 report->field[i]->usage->hid) {
 433                         hid_dbg(hdev, "data was pending ...\n");
 434                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
 435                         if (pdata->pending.raw_data)
 436                                 pdata->pending.raw_size = sz;
 437                         else
 438                                 pdata->pending.raw_size = 0;
 439                         complete(&pdata->pending.ready);
 440                 }
 441                 collection = &hdev->collection[
 442                                 report->field[i]->usage->collection_index];
 443                 hid_dbg(hdev, "collection->usage %x\n",
 444                                         collection->usage);
 445                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 446                                                 report->field[i]->physical,
 447                                                         &priv);
 448                 if (callback && callback->capture_sample) {
 449                         if (report->field[i]->logical)
 450                                 callback->capture_sample(pdata->hsdev,
 451                                         report->field[i]->logical, sz, ptr,
 452                                         callback->pdev);
 453                         else
 454                                 callback->capture_sample(pdata->hsdev,
 455                                         report->field[i]->usage->hid, sz, ptr,
 456                                         callback->pdev);
 457                 }
 458                 ptr += sz;
 459         }
 460         if (callback && collection && callback->send_event)
 461                 callback->send_event(pdata->hsdev, collection->usage,
 462                                 callback->pdev);
 463         spin_unlock_irqrestore(&pdata->lock, flags);
 464
 465         return 1;
 466 }
 467
 468 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
 469 {
 470         int ret = 0;
 471         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 472
 473         mutex_lock(&data->mutex);
 474         if (!hsdev->ref_cnt) {
 475                 ret = hid_hw_open(hsdev->hdev);
 476                 if (ret) {
 477                         hid_err(hsdev->hdev, "failed to open hid device\n");
 478                         mutex_unlock(&data->mutex);
 479                         return ret;
 480                 }
 481         }
 482         hsdev->ref_cnt++;
 483         mutex_unlock(&data->mutex);
 484
 485         return ret;
 486 }
 487 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
 488
 489 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
 490 {
 491         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 492
 493         mutex_lock(&data->mutex);
 494         hsdev->ref_cnt--;
 495         if (!hsdev->ref_cnt)
 496                 hid_hw_close(hsdev->hdev);
 497         mutex_unlock(&data->mutex);
 498 }
 499 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 500
 501 static int sensor_hub_probe(struct hid_device *hdev,
 502                                 const struct hid_device_id *id)
 503 {
 504         int ret;
 505         struct sensor_hub_data *sd;
 506         int i;
 507         char *name;
 508         struct hid_report *report;
 509         struct hid_report_enum *report_enum;
 510         struct hid_field *field;
 511         int dev_cnt;
 512
 513         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
 514         if (!sd) {
 515                 hid_err(hdev, "cannot allocate Sensor data\n");
 516                 return -ENOMEM;
 517         }
 518         sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL);
 519         if (!sd->hsdev) {
 520                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 521                 return -ENOMEM;
 522         }
 523         hid_set_drvdata(hdev, sd);
 524         sd->hsdev->hdev = hdev;
 525         sd->hsdev->vendor_id = hdev->vendor;
 526         sd->hsdev->product_id = hdev->product;
 527         spin_lock_init(&sd->lock);
 528         spin_lock_init(&sd->dyn_callback_lock);
 529         mutex_init(&sd->mutex);
 530         ret = hid_parse(hdev);
 531         if (ret) {
 532                 hid_err(hdev, "parse failed\n");
 533                 return ret;
 534         }
 535         INIT_LIST_HEAD(&hdev->inputs);
 536
 537         ret = hid_hw_start(hdev, 0);
 538         if (ret) {
 539                 hid_err(hdev, "hw start failed\n");
 540                 return ret;
 541         }
 542         INIT_LIST_HEAD(&sd->dyn_callback_list);
 543         sd->hid_sensor_client_cnt = 0;
 544         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 545
 546         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 547         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 548                 hid_err(hdev, "Invalid Physical device count\n");
 549                 ret = -EINVAL;
 550                 goto err_stop_hw;
 551         }
 552         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 553                                                 sizeof(struct mfd_cell),
 554                                                 GFP_KERNEL);
 555         if (sd->hid_sensor_hub_client_devs == NULL) {
 556                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 557                         ret = -ENOMEM;
 558                         goto err_stop_hw;
 559         }
 560         list_for_each_entry(report, &report_enum->report_list, list) {
 561                 hid_dbg(hdev, "Report id:%x\n", report->id);
 562                 field = report->field[0];
 563                 if (report->maxfield && field &&
 564                                         field->physical) {
 565                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 566                                                 field->physical);
 567                         if (name == NULL) {
 568                                 hid_err(hdev, "Failed MFD device name\n");
 569                                         ret = -ENOMEM;
 570                                         goto err_free_names;
 571                         }
 572                         sd->hid_sensor_hub_client_devs[
 573                                 sd->hid_sensor_client_cnt].name = name;
 574                         sd->hid_sensor_hub_client_devs[
 575                                 sd->hid_sensor_client_cnt].platform_data =
 576                                                 sd->hsdev;
 577                         sd->hid_sensor_hub_client_devs[
 578                                 sd->hid_sensor_client_cnt].pdata_size =
 579                                                 sizeof(*sd->hsdev);
 580                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 581                         sd->hid_sensor_client_cnt++;
 582                 }
 583         }
 584         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 585                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 586         if (ret < 0)
 587                 goto err_free_names;
 588
 589         return ret;
 590
 591 err_free_names:
 592         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 593                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 594         kfree(sd->hid_sensor_hub_client_devs);
 595 err_stop_hw:
 596         hid_hw_stop(hdev);
 597
 598         return ret;
 599 }
 600
 601 static void sensor_hub_remove(struct hid_device *hdev)
 602 {
 603         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 604         unsigned long flags;
 605         int i;
 606
 607         hid_dbg(hdev, " hardware removed\n");
 608         hid_hw_close(hdev);
 609         hid_hw_stop(hdev);
 610         spin_lock_irqsave(&data->lock, flags);
 611         if (data->pending.status)
 612                 complete(&data->pending.ready);
 613         spin_unlock_irqrestore(&data->lock, flags);
 614         mfd_remove_devices(&hdev->dev);
 615         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 616                 kfree(data->hid_sensor_hub_client_devs[i].name);
 617         kfree(data->hid_sensor_hub_client_devs);
 618         hid_set_drvdata(hdev, NULL);
 619         mutex_destroy(&data->mutex);
 620 }
 621
 622 static const struct hid_device_id sensor_hub_devices[] = {
 623         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 624                      HID_ANY_ID) },
 625         { }
 626 };
 627 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 628
 629 static struct hid_driver sensor_hub_driver = {
 630         .name = "hid-sensor-hub",
 631         .id_table = sensor_hub_devices,
 632         .probe = sensor_hub_probe,
 633         .remove = sensor_hub_remove,
 634         .raw_event = sensor_hub_raw_event,
 635 #ifdef CONFIG_PM
 636         .suspend = sensor_hub_suspend,
 637         .resume = sensor_hub_resume,
 638         .reset_resume = sensor_hub_reset_resume,
 639 #endif
 640 };
 641 module_hid_driver(sensor_hub_driver);
 642
 643 MODULE_DESCRIPTION("HID Sensor Hub driver");
 644 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 645 MODULE_LICENSE("GPL");