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/usb.h>
  22 #include "usbhid/usbhid.h"
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/list.h>
  27 #include <linux/hid-sensor-ids.h>
  28 #include <linux/hid-sensor-hub.h>
  29 #include "hid-ids.h"
  30
  31 /**
  32  * struct sensor_hub_pending - Synchronous read pending information
  33  * @status:             Pending status true/false.
  34  * @ready:              Completion synchronization data.
  35  * @usage_id:           Usage id for physical device, E.g. Gyro usage id.
  36  * @attr_usage_id:      Usage Id of a field, E.g. X-AXIS for a gyro.
  37  * @raw_size:           Response size for a read request.
  38  * @raw_data:           Place holder for received response.
  39  */
  40 struct sensor_hub_pending {
  41         bool status;
  42         struct completion ready;
  43         u32 usage_id;
  44         u32 attr_usage_id;
  45         int raw_size;
  46         u8  *raw_data;
  47 };
  48
  49 /**
  50  * struct sensor_hub_data - Hold a instance data for a HID hub device
  51  * @hsdev:              Stored hid instance for current hub device.
  52  * @mutex:              Mutex to serialize synchronous request.
  53  * @lock:               Spin lock to protect pending request structure.
  54  * @pending:            Holds information of pending sync read request.
  55  * @dyn_callback_list:  Holds callback function
  56  * @dyn_callback_lock:  spin lock to protect callback list
  57  * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
  58  * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
  59  */
  60 struct sensor_hub_data {
  61         struct hid_sensor_hub_device *hsdev;
  62         struct mutex mutex;
  63         spinlock_t lock;
  64         struct sensor_hub_pending pending;
  65         struct list_head dyn_callback_list;
  66         spinlock_t dyn_callback_lock;
  67         struct mfd_cell *hid_sensor_hub_client_devs;
  68         int hid_sensor_client_cnt;
  69 };
  70
  71 /**
  72  * struct hid_sensor_hub_callbacks_list - Stores callback list
  73  * @list:               list head.
  74  * @usage_id:           usage id for a physical device.
  75  * @usage_callback:     Stores registered callback functions.
  76  * @priv:               Private data for a physical device.
  77  */
  78 struct hid_sensor_hub_callbacks_list {
  79         struct list_head list;
  80         u32 usage_id;
  81         struct hid_sensor_hub_callbacks *usage_callback;
  82         void *priv;
  83 };
  84
  85 static int sensor_hub_check_for_sensor_page(struct hid_device *hdev)
  86 {
  87         int i;
  88         int ret = -EINVAL;
  89
  90         for (i = 0; i < hdev->maxcollection; i++) {
  91                 struct hid_collection *col = &hdev->collection[i];
  92                 if (col->type == HID_COLLECTION_PHYSICAL &&
  93                    (col->usage & HID_USAGE_PAGE) == HID_UP_SENSOR) {
  94                         ret = 0;
  95                         break;
  96                 }
  97         }
  98
  99         return ret;
 100 }
 101
 102 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
 103                                                 int dir)
 104 {
 105         struct hid_report *report;
 106
 107         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
 108                 if (report->id == id)
 109                         return report;
 110         }
 111         hid_warn(hdev, "No report with id 0x%x found\n", id);
 112
 113         return NULL;
 114 }
 115
 116 static int sensor_hub_get_physical_device_count(
 117                                 struct hid_report_enum *report_enum)
 118 {
 119         struct hid_report *report;
 120         struct hid_field *field;
 121         int cnt = 0;
 122
 123         list_for_each_entry(report, &report_enum->report_list, list) {
 124                 field = report->field[0];
 125                 if (report->maxfield && field &&
 126                                         field->physical)
 127                         cnt++;
 128         }
 129
 130         return cnt;
 131 }
 132
 133 static void sensor_hub_fill_attr_info(
 134                 struct hid_sensor_hub_attribute_info *info,
 135                 s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
 136 {
 137         info->index = index;
 138         info->report_id = report_id;
 139         info->units = units;
 140         info->unit_expo = unit_expo;
 141         info->size = size/8;
 142 }
 143
 144 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 145                                         struct hid_device *hdev,
 146                                         u32 usage_id, void **priv)
 147 {
 148         struct hid_sensor_hub_callbacks_list *callback;
 149         struct sensor_hub_data *pdata = hid_get_drvdata(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                         *priv = callback->priv;
 155                         spin_unlock(&pdata->dyn_callback_lock);
 156                         return callback->usage_callback;
 157                 }
 158         spin_unlock(&pdata->dyn_callback_lock);
 159
 160         return NULL;
 161 }
 162
 163 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 164                         u32 usage_id,
 165                         struct hid_sensor_hub_callbacks *usage_callback)
 166 {
 167         struct hid_sensor_hub_callbacks_list *callback;
 168         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 169
 170         spin_lock(&pdata->dyn_callback_lock);
 171         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 172                 if (callback->usage_id == usage_id) {
 173                         spin_unlock(&pdata->dyn_callback_lock);
 174                         return -EINVAL;
 175                 }
 176         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 177         if (!callback) {
 178                 spin_unlock(&pdata->dyn_callback_lock);
 179                 return -ENOMEM;
 180         }
 181         callback->usage_callback = usage_callback;
 182         callback->usage_id = usage_id;
 183         callback->priv = NULL;
 184         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 185         spin_unlock(&pdata->dyn_callback_lock);
 186
 187         return 0;
 188 }
 189 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 190
 191 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 192                                 u32 usage_id)
 193 {
 194         struct hid_sensor_hub_callbacks_list *callback;
 195         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 196
 197         spin_lock(&pdata->dyn_callback_lock);
 198         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 199                 if (callback->usage_id == usage_id) {
 200                         list_del(&callback->list);
 201                         kfree(callback);
 202                         break;
 203                 }
 204         spin_unlock(&pdata->dyn_callback_lock);
 205
 206         return 0;
 207 }
 208 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 209
 210 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 211                                 u32 field_index, s32 value)
 212 {
 213         struct hid_report *report;
 214         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 215         int ret = 0;
 216
 217         mutex_lock(&data->mutex);
 218         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 219         if (!report || (field_index >=  report->maxfield)) {
 220                 ret = -EINVAL;
 221                 goto done_proc;
 222         }
 223         hid_set_field(report->field[field_index], 0, value);
 224         usbhid_submit_report(hsdev->hdev, report, USB_DIR_OUT);
 225         usbhid_wait_io(hsdev->hdev);
 226
 227 done_proc:
 228         mutex_unlock(&data->mutex);
 229
 230         return ret;
 231 }
 232 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 233
 234 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 235                                 u32 field_index, s32 *value)
 236 {
 237         struct hid_report *report;
 238         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 239         int ret = 0;
 240
 241         mutex_lock(&data->mutex);
 242         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 243         if (!report || (field_index >=  report->maxfield)) {
 244                 ret = -EINVAL;
 245                 goto done_proc;
 246         }
 247         usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN);
 248         usbhid_wait_io(hsdev->hdev);
 249         *value = report->field[field_index]->value[0];
 250
 251 done_proc:
 252         mutex_unlock(&data->mutex);
 253
 254         return ret;
 255 }
 256 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 257
 258
 259 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 260                                         u32 usage_id,
 261                                         u32 attr_usage_id, u32 report_id)
 262 {
 263         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 264         unsigned long flags;
 265         struct hid_report *report;
 266         int ret_val = 0;
 267
 268         mutex_lock(&data->mutex);
 269         memset(&data->pending, 0, sizeof(data->pending));
 270         init_completion(&data->pending.ready);
 271         data->pending.usage_id = usage_id;
 272         data->pending.attr_usage_id = attr_usage_id;
 273         data->pending.raw_size = 0;
 274
 275         spin_lock_irqsave(&data->lock, flags);
 276         data->pending.status = true;
 277         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 278         if (!report) {
 279                 spin_unlock_irqrestore(&data->lock, flags);
 280                 goto err_free;
 281         }
 282         usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN);
 283         spin_unlock_irqrestore(&data->lock, flags);
 284         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 285         switch (data->pending.raw_size) {
 286         case 1:
 287                 ret_val = *(u8 *)data->pending.raw_data;
 288                 break;
 289         case 2:
 290                 ret_val = *(u16 *)data->pending.raw_data;
 291                 break;
 292         case 4:
 293                 ret_val = *(u32 *)data->pending.raw_data;
 294                 break;
 295         default:
 296                 ret_val = 0;
 297         }
 298         kfree(data->pending.raw_data);
 299
 300 err_free:
 301         data->pending.status = false;
 302         mutex_unlock(&data->mutex);
 303
 304         return ret_val;
 305 }
 306 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 307
 308 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 309                                 u8 type,
 310                                 u32 usage_id,
 311                                 u32 attr_usage_id,
 312                                 struct hid_sensor_hub_attribute_info *info)
 313 {
 314         int ret = -1;
 315         int i, j;
 316         int collection_index = -1;
 317         struct hid_report *report;
 318         struct hid_field *field;
 319         struct hid_report_enum *report_enum;
 320         struct hid_device *hdev = hsdev->hdev;
 321
 322         /* Initialize with defaults */
 323         info->usage_id = usage_id;
 324         info->attrib_id =  attr_usage_id;
 325         info->report_id = -1;
 326         info->index = -1;
 327         info->units = -1;
 328         info->unit_expo = -1;
 329
 330         for (i = 0; i < hdev->maxcollection; ++i) {
 331                 struct hid_collection *collection = &hdev->collection[i];
 332                 if (usage_id == collection->usage) {
 333                         collection_index = i;
 334                         break;
 335                 }
 336         }
 337         if (collection_index == -1)
 338                 goto err_ret;
 339
 340         report_enum = &hdev->report_enum[type];
 341         list_for_each_entry(report, &report_enum->report_list, list) {
 342                 for (i = 0; i < report->maxfield; ++i) {
 343                         field = report->field[i];
 344                         if (field->physical == usage_id &&
 345                                 field->logical == attr_usage_id) {
 346                                 sensor_hub_fill_attr_info(info, i, report->id,
 347                                         field->unit, field->unit_exponent,
 348                                         field->report_size);
 349                                 ret = 0;
 350                         } else {
 351                                 for (j = 0; j < field->maxusage; ++j) {
 352                                         if (field->usage[j].hid ==
 353                                         attr_usage_id &&
 354                                         field->usage[j].collection_index ==
 355                                         collection_index)  {
 356                                                 sensor_hub_fill_attr_info(info,
 357                                                         i, report->id,
 358                                                         field->unit,
 359                                                         field->unit_exponent,
 360                                                         field->report_size);
 361                                                 ret = 0;
 362                                                 break;
 363                                         }
 364                                 }
 365                         }
 366                         if (ret == 0)
 367                                 break;
 368                 }
 369         }
 370
 371 err_ret:
 372         return ret;
 373 }
 374 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 375
 376 #ifdef CONFIG_PM
 377 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 378 {
 379         struct sensor_hub_data *pdata =  hid_get_drvdata(hdev);
 380         struct hid_sensor_hub_callbacks_list *callback;
 381
 382         hid_dbg(hdev, " sensor_hub_suspend\n");
 383         spin_lock(&pdata->dyn_callback_lock);
 384         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 385                 if (callback->usage_callback->suspend)
 386                         callback->usage_callback->suspend(
 387                                         pdata->hsdev, callback->priv);
 388         }
 389         spin_unlock(&pdata->dyn_callback_lock);
 390
 391         return 0;
 392 }
 393
 394 static int sensor_hub_resume(struct hid_device *hdev)
 395 {
 396         struct sensor_hub_data *pdata =  hid_get_drvdata(hdev);
 397         struct hid_sensor_hub_callbacks_list *callback;
 398
 399         hid_dbg(hdev, " sensor_hub_resume\n");
 400         spin_lock(&pdata->dyn_callback_lock);
 401         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 402                 if (callback->usage_callback->resume)
 403                         callback->usage_callback->resume(
 404                                         pdata->hsdev, callback->priv);
 405         }
 406         spin_unlock(&pdata->dyn_callback_lock);
 407
 408         return 0;
 409 }
 410
 411 static int sensor_hub_reset_resume(struct hid_device *hdev)
 412 {
 413         return 0;
 414 }
 415 #endif
 416 /*
 417  * Handle raw report as sent by device
 418  */
 419 static int sensor_hub_raw_event(struct hid_device *hdev,
 420                 struct hid_report *report, u8 *raw_data, int size)
 421 {
 422         int i;
 423         u8 *ptr;
 424         int sz;
 425         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 426         unsigned long flags;
 427         struct hid_sensor_hub_callbacks *callback = NULL;
 428         struct hid_collection *collection = NULL;
 429         void *priv = NULL;
 430
 431         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 432                          report->id, size, report->type);
 433         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 434         if (report->type != HID_INPUT_REPORT)
 435                 return 1;
 436
 437         ptr = raw_data;
 438         ptr++; /*Skip report id*/
 439
 440         if (!report)
 441                 goto err_report;
 442
 443         spin_lock_irqsave(&pdata->lock, flags);
 444
 445         for (i = 0; i < report->maxfield; ++i) {
 446
 447                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 448                                 i, report->field[i]->usage->collection_index,
 449                                 report->field[i]->usage->hid,
 450                                 report->field[i]->report_size/8);
 451
 452                 sz = report->field[i]->report_size/8;
 453                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 454                                 report->field[i]->usage->hid) {
 455                         hid_dbg(hdev, "data was pending ...\n");
 456                         pdata->pending.raw_data = kmalloc(sz, GFP_ATOMIC);
 457                         if (pdata->pending.raw_data) {
 458                                 memcpy(pdata->pending.raw_data, ptr, sz);
 459                                 pdata->pending.raw_size  = sz;
 460                         } else
 461                                 pdata->pending.raw_size = 0;
 462                         complete(&pdata->pending.ready);
 463                 }
 464                 collection = &hdev->collection[
 465                                 report->field[i]->usage->collection_index];
 466                 hid_dbg(hdev, "collection->usage %x\n",
 467                                         collection->usage);
 468                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 469                                                 report->field[i]->physical,
 470                                                         &priv);
 471                 if (callback && callback->capture_sample) {
 472                         if (report->field[i]->logical)
 473                                 callback->capture_sample(pdata->hsdev,
 474                                         report->field[i]->logical, sz, ptr,
 475                                         callback->pdev);
 476                         else
 477                                 callback->capture_sample(pdata->hsdev,
 478                                         report->field[i]->usage->hid, sz, ptr,
 479                                         callback->pdev);
 480                 }
 481                 ptr += sz;
 482         }
 483         if (callback && collection && callback->send_event)
 484                 callback->send_event(pdata->hsdev, collection->usage,
 485                                 callback->pdev);
 486         spin_unlock_irqrestore(&pdata->lock, flags);
 487
 488 err_report:
 489         return 1;
 490 }
 491
 492 static int sensor_hub_probe(struct hid_device *hdev,
 493                                 const struct hid_device_id *id)
 494 {
 495         int ret;
 496         struct sensor_hub_data *sd;
 497         int i;
 498         char *name;
 499         struct hid_report *report;
 500         struct hid_report_enum *report_enum;
 501         struct hid_field *field;
 502         int dev_cnt;
 503
 504         sd = kzalloc(sizeof(struct sensor_hub_data), GFP_KERNEL);
 505         if (!sd) {
 506                 hid_err(hdev, "cannot allocate Sensor data\n");
 507                 return -ENOMEM;
 508         }
 509         sd->hsdev = kzalloc(sizeof(struct hid_sensor_hub_device), GFP_KERNEL);
 510         if (!sd->hsdev) {
 511                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 512                 ret = -ENOMEM;
 513                 goto err_free_hub;
 514         }
 515         hid_set_drvdata(hdev, sd);
 516         sd->hsdev->hdev = hdev;
 517         sd->hsdev->vendor_id = hdev->vendor;
 518         sd->hsdev->product_id = hdev->product;
 519         spin_lock_init(&sd->lock);
 520         spin_lock_init(&sd->dyn_callback_lock);
 521         mutex_init(&sd->mutex);
 522         ret = hid_parse(hdev);
 523         if (ret) {
 524                 hid_err(hdev, "parse failed\n");
 525                 goto err_free;
 526         }
 527         if (sensor_hub_check_for_sensor_page(hdev) < 0) {
 528                 hid_err(hdev, "sensor page not found\n");
 529                 goto err_free;
 530         }
 531         INIT_LIST_HEAD(&hdev->inputs);
 532
 533         ret = hid_hw_start(hdev, 0);
 534         if (ret) {
 535                 hid_err(hdev, "hw start failed\n");
 536                 goto err_free;
 537         }
 538         ret = hid_hw_open(hdev);
 539         if (ret) {
 540                 hid_err(hdev, "failed to open input interrupt pipe\n");
 541                 goto err_stop_hw;
 542         }
 543
 544         INIT_LIST_HEAD(&sd->dyn_callback_list);
 545         sd->hid_sensor_client_cnt = 0;
 546         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 547
 548         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 549         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 550                 hid_err(hdev, "Invalid Physical device count\n");
 551                 ret = -EINVAL;
 552                 goto err_close;
 553         }
 554         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 555                                                 sizeof(struct mfd_cell),
 556                                                 GFP_KERNEL);
 557         if (sd->hid_sensor_hub_client_devs == NULL) {
 558                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 559                         ret = -ENOMEM;
 560                         goto err_close;
 561         }
 562         list_for_each_entry(report, &report_enum->report_list, list) {
 563                 hid_dbg(hdev, "Report id:%x\n", report->id);
 564                 field = report->field[0];
 565                 if (report->maxfield && field &&
 566                                         field->physical) {
 567                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 568                                                 field->physical);
 569                         if (name  == NULL) {
 570                                 hid_err(hdev, "Failed MFD device name\n");
 571                                         ret = -ENOMEM;
 572                                         goto err_free_names;
 573                         }
 574                         sd->hid_sensor_hub_client_devs[
 575                                 sd->hid_sensor_client_cnt].name = name;
 576                         sd->hid_sensor_hub_client_devs[
 577                                 sd->hid_sensor_client_cnt].platform_data =
 578                                                 sd->hsdev;
 579                         sd->hid_sensor_hub_client_devs[
 580                                 sd->hid_sensor_client_cnt].pdata_size =
 581                                                 sizeof(*sd->hsdev);
 582                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 583                         sd->hid_sensor_client_cnt++;
 584                 }
 585         }
 586         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 587                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 588         if (ret < 0)
 589                 goto err_free_names;
 590
 591         return ret;
 592
 593 err_free_names:
 594         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 595                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 596         kfree(sd->hid_sensor_hub_client_devs);
 597 err_close:
 598         hid_hw_close(hdev);
 599 err_stop_hw:
 600         hid_hw_stop(hdev);
 601 err_free:
 602         kfree(sd->hsdev);
 603 err_free_hub:
 604         kfree(sd);
 605
 606         return ret;
 607 }
 608
 609 static void sensor_hub_remove(struct hid_device *hdev)
 610 {
 611         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 612         unsigned long flags;
 613         int i;
 614
 615         hid_dbg(hdev, " hardware removed\n");
 616         hid_hw_close(hdev);
 617         hid_hw_stop(hdev);
 618         spin_lock_irqsave(&data->lock, flags);
 619         if (data->pending.status)
 620                 complete(&data->pending.ready);
 621         spin_unlock_irqrestore(&data->lock, flags);
 622         mfd_remove_devices(&hdev->dev);
 623         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 624                 kfree(data->hid_sensor_hub_client_devs[i].name);
 625         kfree(data->hid_sensor_hub_client_devs);
 626         hid_set_drvdata(hdev, NULL);
 627         mutex_destroy(&data->mutex);
 628         kfree(data->hsdev);
 629         kfree(data);
 630 }
 631
 632 static const struct hid_device_id sensor_hub_devices[] = {
 633         { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086,
 634                         USB_DEVICE_ID_SENSOR_HUB_1020) },
 635         { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087,
 636                         USB_DEVICE_ID_SENSOR_HUB_1020) },
 637         { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086,
 638                         USB_DEVICE_ID_SENSOR_HUB_09FA) },
 639         { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087,
 640                         USB_DEVICE_ID_SENSOR_HUB_09FA) },
 641         { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
 642                         USB_DEVICE_ID_SENSOR_HUB_7014) },
 643         { }
 644 };
 645 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 646
 647 static const struct hid_usage_id sensor_hub_grabbed_usages[] = {
 648         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
 649         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 }
 650 };
 651
 652 static struct hid_driver sensor_hub_driver = {
 653         .name = "hid-sensor-hub",
 654         .id_table = sensor_hub_devices,
 655         .probe = sensor_hub_probe,
 656         .remove = sensor_hub_remove,
 657         .raw_event = sensor_hub_raw_event,
 658 #ifdef CONFIG_PM
 659         .suspend = sensor_hub_suspend,
 660         .resume =  sensor_hub_resume,
 661         .reset_resume =  sensor_hub_reset_resume,
 662 #endif
 663 };
 664
 665 static int __init sensor_hub_init(void)
 666 {
 667         return hid_register_driver(&sensor_hub_driver);
 668 }
 669
 670 static void __exit sensor_hub_exit(void)
 671 {
 672         hid_unregister_driver(&sensor_hub_driver);
 673 }
 674
 675 module_init(sensor_hub_init);
 676 module_exit(sensor_hub_exit);
 677
 678 MODULE_DESCRIPTION("HID Sensor Hub driver");
 679 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 680 MODULE_LICENSE("GPL");