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 &&
 107                                         field->physical)
 108                         cnt++;
 109         }
 110
 111         return cnt;
 112 }
 113
 114 static void sensor_hub_fill_attr_info(
 115                 struct hid_sensor_hub_attribute_info *info,
 116                 s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
 117 {
 118         info->index = index;
 119         info->report_id = report_id;
 120         info->units = units;
 121         info->unit_expo = unit_expo;
 122         info->size = size/8;
 123 }
 124
 125 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 126                                         struct hid_device *hdev,
 127                                         u32 usage_id, void **priv)
 128 {
 129         struct hid_sensor_hub_callbacks_list *callback;
 130         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 131
 132         spin_lock(&pdata->dyn_callback_lock);
 133         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 134                 if (callback->usage_id == usage_id) {
 135                         *priv = callback->priv;
 136                         spin_unlock(&pdata->dyn_callback_lock);
 137                         return callback->usage_callback;
 138                 }
 139         spin_unlock(&pdata->dyn_callback_lock);
 140
 141         return NULL;
 142 }
 143
 144 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 145                         u32 usage_id,
 146                         struct hid_sensor_hub_callbacks *usage_callback)
 147 {
 148         struct hid_sensor_hub_callbacks_list *callback;
 149         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 150
 151         spin_lock(&pdata->dyn_callback_lock);
 152         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 153                 if (callback->usage_id == usage_id) {
 154                         spin_unlock(&pdata->dyn_callback_lock);
 155                         return -EINVAL;
 156                 }
 157         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 158         if (!callback) {
 159                 spin_unlock(&pdata->dyn_callback_lock);
 160                 return -ENOMEM;
 161         }
 162         callback->usage_callback = usage_callback;
 163         callback->usage_id = usage_id;
 164         callback->priv = NULL;
 165         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 166         spin_unlock(&pdata->dyn_callback_lock);
 167
 168         return 0;
 169 }
 170 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 171
 172 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 173                                 u32 usage_id)
 174 {
 175         struct hid_sensor_hub_callbacks_list *callback;
 176         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 177
 178         spin_lock(&pdata->dyn_callback_lock);
 179         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 180                 if (callback->usage_id == usage_id) {
 181                         list_del(&callback->list);
 182                         kfree(callback);
 183                         break;
 184                 }
 185         spin_unlock(&pdata->dyn_callback_lock);
 186
 187         return 0;
 188 }
 189 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 190
 191 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 192                                 u32 field_index, s32 value)
 193 {
 194         struct hid_report *report;
 195         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 196         int ret = 0;
 197
 198         mutex_lock(&data->mutex);
 199         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 200         if (!report || (field_index >=  report->maxfield)) {
 201                 ret = -EINVAL;
 202                 goto done_proc;
 203         }
 204         hid_set_field(report->field[field_index], 0, value);
 205         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 206         hid_hw_wait(hsdev->hdev);
 207
 208 done_proc:
 209         mutex_unlock(&data->mutex);
 210
 211         return ret;
 212 }
 213 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 214
 215 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 216                                 u32 field_index, s32 *value)
 217 {
 218         struct hid_report *report;
 219         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 220         int ret = 0;
 221
 222         mutex_lock(&data->mutex);
 223         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 224         if (!report || (field_index >=  report->maxfield) ||
 225             report->field[field_index]->report_count < 1) {
 226                 ret = -EINVAL;
 227                 goto done_proc;
 228         }
 229         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 230         hid_hw_wait(hsdev->hdev);
 231         *value = report->field[field_index]->value[0];
 232
 233 done_proc:
 234         mutex_unlock(&data->mutex);
 235
 236         return ret;
 237 }
 238 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 239
 240
 241 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 242                                         u32 usage_id,
 243                                         u32 attr_usage_id, u32 report_id)
 244 {
 245         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 246         unsigned long flags;
 247         struct hid_report *report;
 248         int ret_val = 0;
 249
 250         mutex_lock(&data->mutex);
 251         memset(&data->pending, 0, sizeof(data->pending));
 252         init_completion(&data->pending.ready);
 253         data->pending.usage_id = usage_id;
 254         data->pending.attr_usage_id = attr_usage_id;
 255         data->pending.raw_size = 0;
 256
 257         spin_lock_irqsave(&data->lock, flags);
 258         data->pending.status = true;
 259         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 260         if (!report) {
 261                 spin_unlock_irqrestore(&data->lock, flags);
 262                 goto err_free;
 263         }
 264         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 265         spin_unlock_irqrestore(&data->lock, flags);
 266         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 267         switch (data->pending.raw_size) {
 268         case 1:
 269                 ret_val = *(u8 *)data->pending.raw_data;
 270                 break;
 271         case 2:
 272                 ret_val = *(u16 *)data->pending.raw_data;
 273                 break;
 274         case 4:
 275                 ret_val = *(u32 *)data->pending.raw_data;
 276                 break;
 277         default:
 278                 ret_val = 0;
 279         }
 280         kfree(data->pending.raw_data);
 281
 282 err_free:
 283         data->pending.status = false;
 284         mutex_unlock(&data->mutex);
 285
 286         return ret_val;
 287 }
 288 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 289
 290 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 291                                 u8 type,
 292                                 u32 usage_id,
 293                                 u32 attr_usage_id,
 294                                 struct hid_sensor_hub_attribute_info *info)
 295 {
 296         int ret = -1;
 297         int i, j;
 298         int collection_index = -1;
 299         struct hid_report *report;
 300         struct hid_field *field;
 301         struct hid_report_enum *report_enum;
 302         struct hid_device *hdev = hsdev->hdev;
 303
 304         /* Initialize with defaults */
 305         info->usage_id = usage_id;
 306         info->attrib_id =  attr_usage_id;
 307         info->report_id = -1;
 308         info->index = -1;
 309         info->units = -1;
 310         info->unit_expo = -1;
 311
 312         for (i = 0; i < hdev->maxcollection; ++i) {
 313                 struct hid_collection *collection = &hdev->collection[i];
 314                 if (usage_id == collection->usage) {
 315                         collection_index = i;
 316                         break;
 317                 }
 318         }
 319         if (collection_index == -1)
 320                 goto err_ret;
 321
 322         report_enum = &hdev->report_enum[type];
 323         list_for_each_entry(report, &report_enum->report_list, list) {
 324                 for (i = 0; i < report->maxfield; ++i) {
 325                         field = report->field[i];
 326                         if (field->physical == usage_id &&
 327                                 field->logical == attr_usage_id) {
 328                                 sensor_hub_fill_attr_info(info, i, report->id,
 329                                         field->unit, field->unit_exponent,
 330                                         field->report_size *
 331                                                         field->report_count);
 332                                 ret = 0;
 333                         } else {
 334                                 for (j = 0; j < field->maxusage; ++j) {
 335                                         if (field->usage[j].hid ==
 336                                         attr_usage_id &&
 337                                         field->usage[j].collection_index ==
 338                                         collection_index)  {
 339                                                 sensor_hub_fill_attr_info(info,
 340                                                         i, report->id,
 341                                                         field->unit,
 342                                                         field->unit_exponent,
 343                                                         field->report_size *
 344                                                         field->report_count);
 345                                                 ret = 0;
 346                                                 break;
 347                                         }
 348                                 }
 349                         }
 350                         if (ret == 0)
 351                                 break;
 352                 }
 353         }
 354
 355 err_ret:
 356         return ret;
 357 }
 358 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 359
 360 #ifdef CONFIG_PM
 361 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 362 {
 363         struct sensor_hub_data *pdata =  hid_get_drvdata(hdev);
 364         struct hid_sensor_hub_callbacks_list *callback;
 365
 366         hid_dbg(hdev, " sensor_hub_suspend\n");
 367         spin_lock(&pdata->dyn_callback_lock);
 368         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 369                 if (callback->usage_callback->suspend)
 370                         callback->usage_callback->suspend(
 371                                         pdata->hsdev, callback->priv);
 372         }
 373         spin_unlock(&pdata->dyn_callback_lock);
 374
 375         return 0;
 376 }
 377
 378 static int sensor_hub_resume(struct hid_device *hdev)
 379 {
 380         struct sensor_hub_data *pdata =  hid_get_drvdata(hdev);
 381         struct hid_sensor_hub_callbacks_list *callback;
 382
 383         hid_dbg(hdev, " sensor_hub_resume\n");
 384         spin_lock(&pdata->dyn_callback_lock);
 385         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 386                 if (callback->usage_callback->resume)
 387                         callback->usage_callback->resume(
 388                                         pdata->hsdev, callback->priv);
 389         }
 390         spin_unlock(&pdata->dyn_callback_lock);
 391
 392         return 0;
 393 }
 394
 395 static int sensor_hub_reset_resume(struct hid_device *hdev)
 396 {
 397         return 0;
 398 }
 399 #endif
 400 /*
 401  * Handle raw report as sent by device
 402  */
 403 static int sensor_hub_raw_event(struct hid_device *hdev,
 404                 struct hid_report *report, u8 *raw_data, int size)
 405 {
 406         int i;
 407         u8 *ptr;
 408         int sz;
 409         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 410         unsigned long flags;
 411         struct hid_sensor_hub_callbacks *callback = NULL;
 412         struct hid_collection *collection = NULL;
 413         void *priv = NULL;
 414
 415         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 416                          report->id, size, report->type);
 417         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 418         if (report->type != HID_INPUT_REPORT)
 419                 return 1;
 420
 421         ptr = raw_data;
 422         ptr++; /*Skip report id*/
 423
 424         spin_lock_irqsave(&pdata->lock, flags);
 425
 426         for (i = 0; i < report->maxfield; ++i) {
 427
 428                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 429                                 i, report->field[i]->usage->collection_index,
 430                                 report->field[i]->usage->hid,
 431                                 (report->field[i]->report_size *
 432                                         report->field[i]->report_count)/8);
 433                 sz = (report->field[i]->report_size *
 434                                         report->field[i]->report_count)/8;
 435                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 436                                 report->field[i]->usage->hid) {
 437                         hid_dbg(hdev, "data was pending ...\n");
 438                         pdata->pending.raw_data = kmalloc(sz, GFP_ATOMIC);
 439                         if (pdata->pending.raw_data) {
 440                                 memcpy(pdata->pending.raw_data, ptr, sz);
 441                                 pdata->pending.raw_size  = sz;
 442                         } else
 443                                 pdata->pending.raw_size = 0;
 444                         complete(&pdata->pending.ready);
 445                 }
 446                 collection = &hdev->collection[
 447                                 report->field[i]->usage->collection_index];
 448                 hid_dbg(hdev, "collection->usage %x\n",
 449                                         collection->usage);
 450                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 451                                                 report->field[i]->physical,
 452                                                         &priv);
 453                 if (callback && callback->capture_sample) {
 454                         if (report->field[i]->logical)
 455                                 callback->capture_sample(pdata->hsdev,
 456                                         report->field[i]->logical, sz, ptr,
 457                                         callback->pdev);
 458                         else
 459                                 callback->capture_sample(pdata->hsdev,
 460                                         report->field[i]->usage->hid, sz, ptr,
 461                                         callback->pdev);
 462                 }
 463                 ptr += sz;
 464         }
 465         if (callback && collection && callback->send_event)
 466                 callback->send_event(pdata->hsdev, collection->usage,
 467                                 callback->pdev);
 468         spin_unlock_irqrestore(&pdata->lock, flags);
 469
 470         return 1;
 471 }
 472
 473 static int sensor_hub_probe(struct hid_device *hdev,
 474                                 const struct hid_device_id *id)
 475 {
 476         int ret;
 477         struct sensor_hub_data *sd;
 478         int i;
 479         char *name;
 480         struct hid_report *report;
 481         struct hid_report_enum *report_enum;
 482         struct hid_field *field;
 483         int dev_cnt;
 484
 485         sd = kzalloc(sizeof(struct sensor_hub_data), GFP_KERNEL);
 486         if (!sd) {
 487                 hid_err(hdev, "cannot allocate Sensor data\n");
 488                 return -ENOMEM;
 489         }
 490         sd->hsdev = kzalloc(sizeof(struct hid_sensor_hub_device), GFP_KERNEL);
 491         if (!sd->hsdev) {
 492                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 493                 ret = -ENOMEM;
 494                 goto err_free_hub;
 495         }
 496         hid_set_drvdata(hdev, sd);
 497         sd->hsdev->hdev = hdev;
 498         sd->hsdev->vendor_id = hdev->vendor;
 499         sd->hsdev->product_id = hdev->product;
 500         spin_lock_init(&sd->lock);
 501         spin_lock_init(&sd->dyn_callback_lock);
 502         mutex_init(&sd->mutex);
 503         ret = hid_parse(hdev);
 504         if (ret) {
 505                 hid_err(hdev, "parse failed\n");
 506                 goto err_free;
 507         }
 508         INIT_LIST_HEAD(&hdev->inputs);
 509
 510         ret = hid_hw_start(hdev, 0);
 511         if (ret) {
 512                 hid_err(hdev, "hw start failed\n");
 513                 goto err_free;
 514         }
 515         ret = hid_hw_open(hdev);
 516         if (ret) {
 517                 hid_err(hdev, "failed to open input interrupt pipe\n");
 518                 goto err_stop_hw;
 519         }
 520
 521         INIT_LIST_HEAD(&sd->dyn_callback_list);
 522         sd->hid_sensor_client_cnt = 0;
 523         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 524
 525         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 526         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 527                 hid_err(hdev, "Invalid Physical device count\n");
 528                 ret = -EINVAL;
 529                 goto err_close;
 530         }
 531         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 532                                                 sizeof(struct mfd_cell),
 533                                                 GFP_KERNEL);
 534         if (sd->hid_sensor_hub_client_devs == NULL) {
 535                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 536                         ret = -ENOMEM;
 537                         goto err_close;
 538         }
 539         list_for_each_entry(report, &report_enum->report_list, list) {
 540                 hid_dbg(hdev, "Report id:%x\n", report->id);
 541                 field = report->field[0];
 542                 if (report->maxfield && field &&
 543                                         field->physical) {
 544                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 545                                                 field->physical);
 546                         if (name  == NULL) {
 547                                 hid_err(hdev, "Failed MFD device name\n");
 548                                         ret = -ENOMEM;
 549                                         goto err_free_names;
 550                         }
 551                         sd->hid_sensor_hub_client_devs[
 552                                 sd->hid_sensor_client_cnt].name = name;
 553                         sd->hid_sensor_hub_client_devs[
 554                                 sd->hid_sensor_client_cnt].platform_data =
 555                                                 sd->hsdev;
 556                         sd->hid_sensor_hub_client_devs[
 557                                 sd->hid_sensor_client_cnt].pdata_size =
 558                                                 sizeof(*sd->hsdev);
 559                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 560                         sd->hid_sensor_client_cnt++;
 561                 }
 562         }
 563         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 564                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 565         if (ret < 0)
 566                 goto err_free_names;
 567
 568         return ret;
 569
 570 err_free_names:
 571         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 572                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 573         kfree(sd->hid_sensor_hub_client_devs);
 574 err_close:
 575         hid_hw_close(hdev);
 576 err_stop_hw:
 577         hid_hw_stop(hdev);
 578 err_free:
 579         kfree(sd->hsdev);
 580 err_free_hub:
 581         kfree(sd);
 582
 583         return ret;
 584 }
 585
 586 static void sensor_hub_remove(struct hid_device *hdev)
 587 {
 588         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 589         unsigned long flags;
 590         int i;
 591
 592         hid_dbg(hdev, " hardware removed\n");
 593         hid_hw_close(hdev);
 594         hid_hw_stop(hdev);
 595         spin_lock_irqsave(&data->lock, flags);
 596         if (data->pending.status)
 597                 complete(&data->pending.ready);
 598         spin_unlock_irqrestore(&data->lock, flags);
 599         mfd_remove_devices(&hdev->dev);
 600         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 601                 kfree(data->hid_sensor_hub_client_devs[i].name);
 602         kfree(data->hid_sensor_hub_client_devs);
 603         hid_set_drvdata(hdev, NULL);
 604         mutex_destroy(&data->mutex);
 605         kfree(data->hsdev);
 606         kfree(data);
 607 }
 608
 609 static const struct hid_device_id sensor_hub_devices[] = {
 610         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 611                      HID_ANY_ID) },
 612         { }
 613 };
 614 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 615
 616 static struct hid_driver sensor_hub_driver = {
 617         .name = "hid-sensor-hub",
 618         .id_table = sensor_hub_devices,
 619         .probe = sensor_hub_probe,
 620         .remove = sensor_hub_remove,
 621         .raw_event = sensor_hub_raw_event,
 622 #ifdef CONFIG_PM
 623         .suspend = sensor_hub_suspend,
 624         .resume =  sensor_hub_resume,
 625         .reset_resume =  sensor_hub_reset_resume,
 626 #endif
 627 };
 628 module_hid_driver(sensor_hub_driver);
 629
 630 MODULE_DESCRIPTION("HID Sensor Hub driver");
 631 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 632 MODULE_LICENSE("GPL");