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 #define HID_SENSOR_HUB_ENUM_QUIRK       0x01
  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         unsigned long quirks;
  70 };
  71
  72 /**
  73  * struct hid_sensor_hub_callbacks_list - Stores callback list
  74  * @list:               list head.
  75  * @usage_id:           usage id for a physical device.
  76  * @usage_callback:     Stores registered callback functions.
  77  * @priv:               Private data for a physical device.
  78  */
  79 struct hid_sensor_hub_callbacks_list {
  80         struct list_head list;
  81         u32 usage_id;
  82         struct hid_sensor_hub_callbacks *usage_callback;
  83         void *priv;
  84 };
  85
  86 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  87                                                 int dir)
  88 {
  89         struct hid_report *report;
  90
  91         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  92                 if (report->id == id)
  93                         return report;
  94         }
  95         hid_warn(hdev, "No report with id 0x%x found\n", id);
  96
  97         return NULL;
  98 }
  99
 100 static int sensor_hub_get_physical_device_count(
 101                                 struct hid_report_enum *report_enum)
 102 {
 103         struct hid_report *report;
 104         struct hid_field *field;
 105         int cnt = 0;
 106
 107         list_for_each_entry(report, &report_enum->report_list, list) {
 108                 field = report->field[0];
 109                 if (report->maxfield && field && field->physical)
 110                         cnt++;
 111         }
 112
 113         return cnt;
 114 }
 115
 116 static void sensor_hub_fill_attr_info(
 117                 struct hid_sensor_hub_attribute_info *info,
 118                 s32 index, s32 report_id, struct hid_field *field)
 119 {
 120         info->index = index;
 121         info->report_id = report_id;
 122         info->units = field->unit;
 123         info->unit_expo = field->unit_exponent;
 124         info->size = (field->report_size * field->report_count)/8;
 125         info->logical_minimum = field->logical_minimum;
 126         info->logical_maximum = field->logical_maximum;
 127 }
 128
 129 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 130                                         struct hid_device *hdev,
 131                                         u32 usage_id, void **priv)
 132 {
 133         struct hid_sensor_hub_callbacks_list *callback;
 134         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 135
 136         spin_lock(&pdata->dyn_callback_lock);
 137         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 138                 if (callback->usage_id == usage_id) {
 139                         *priv = callback->priv;
 140                         spin_unlock(&pdata->dyn_callback_lock);
 141                         return callback->usage_callback;
 142                 }
 143         spin_unlock(&pdata->dyn_callback_lock);
 144
 145         return NULL;
 146 }
 147
 148 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 149                         u32 usage_id,
 150                         struct hid_sensor_hub_callbacks *usage_callback)
 151 {
 152         struct hid_sensor_hub_callbacks_list *callback;
 153         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 154
 155         spin_lock(&pdata->dyn_callback_lock);
 156         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 157                 if (callback->usage_id == usage_id) {
 158                         spin_unlock(&pdata->dyn_callback_lock);
 159                         return -EINVAL;
 160                 }
 161         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 162         if (!callback) {
 163                 spin_unlock(&pdata->dyn_callback_lock);
 164                 return -ENOMEM;
 165         }
 166         callback->usage_callback = usage_callback;
 167         callback->usage_id = usage_id;
 168         callback->priv = NULL;
 169         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 170         spin_unlock(&pdata->dyn_callback_lock);
 171
 172         return 0;
 173 }
 174 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 175
 176 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 177                                 u32 usage_id)
 178 {
 179         struct hid_sensor_hub_callbacks_list *callback;
 180         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 181
 182         spin_lock(&pdata->dyn_callback_lock);
 183         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 184                 if (callback->usage_id == usage_id) {
 185                         list_del(&callback->list);
 186                         kfree(callback);
 187                         break;
 188                 }
 189         spin_unlock(&pdata->dyn_callback_lock);
 190
 191         return 0;
 192 }
 193 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 194
 195 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 196                                 u32 field_index, s32 value)
 197 {
 198         struct hid_report *report;
 199         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 200         int ret = 0;
 201
 202         mutex_lock(&data->mutex);
 203         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 204         if (!report || (field_index >= report->maxfield)) {
 205                 ret = -EINVAL;
 206                 goto done_proc;
 207         }
 208         hid_set_field(report->field[field_index], 0, value);
 209         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 210         hid_hw_wait(hsdev->hdev);
 211
 212 done_proc:
 213         mutex_unlock(&data->mutex);
 214
 215         return ret;
 216 }
 217 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 218
 219 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 220                                 u32 field_index, s32 *value)
 221 {
 222         struct hid_report *report;
 223         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 224         int ret = 0;
 225
 226         mutex_lock(&data->mutex);
 227         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 228         if (!report || (field_index >= report->maxfield) ||
 229             report->field[field_index]->report_count < 1) {
 230                 ret = -EINVAL;
 231                 goto done_proc;
 232         }
 233         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 234         hid_hw_wait(hsdev->hdev);
 235         *value = report->field[field_index]->value[0];
 236
 237 done_proc:
 238         mutex_unlock(&data->mutex);
 239
 240         return ret;
 241 }
 242 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 243
 244
 245 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 246                                         u32 usage_id,
 247                                         u32 attr_usage_id, u32 report_id)
 248 {
 249         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 250         unsigned long flags;
 251         struct hid_report *report;
 252         int ret_val = 0;
 253
 254         mutex_lock(&data->mutex);
 255         memset(&data->pending, 0, sizeof(data->pending));
 256         init_completion(&data->pending.ready);
 257         data->pending.usage_id = usage_id;
 258         data->pending.attr_usage_id = attr_usage_id;
 259         data->pending.raw_size = 0;
 260
 261         spin_lock_irqsave(&data->lock, flags);
 262         data->pending.status = true;
 263         spin_unlock_irqrestore(&data->lock, flags);
 264         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 265         if (!report)
 266                 goto err_free;
 267
 268         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 269         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 270         switch (data->pending.raw_size) {
 271         case 1:
 272                 ret_val = *(u8 *)data->pending.raw_data;
 273                 break;
 274         case 2:
 275                 ret_val = *(u16 *)data->pending.raw_data;
 276                 break;
 277         case 4:
 278                 ret_val = *(u32 *)data->pending.raw_data;
 279                 break;
 280         default:
 281                 ret_val = 0;
 282         }
 283         kfree(data->pending.raw_data);
 284
 285 err_free:
 286         data->pending.status = false;
 287         mutex_unlock(&data->mutex);
 288
 289         return ret_val;
 290 }
 291 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 292
 293 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 294                                 u8 type,
 295                                 u32 usage_id,
 296                                 u32 attr_usage_id,
 297                                 struct hid_sensor_hub_attribute_info *info)
 298 {
 299         int ret = -1;
 300         int i, j;
 301         int collection_index = -1;
 302         struct hid_report *report;
 303         struct hid_field *field;
 304         struct hid_report_enum *report_enum;
 305         struct hid_device *hdev = hsdev->hdev;
 306
 307         /* Initialize with defaults */
 308         info->usage_id = usage_id;
 309         info->attrib_id = attr_usage_id;
 310         info->report_id = -1;
 311         info->index = -1;
 312         info->units = -1;
 313         info->unit_expo = -1;
 314
 315         for (i = 0; i < hdev->maxcollection; ++i) {
 316                 struct hid_collection *collection = &hdev->collection[i];
 317                 if (usage_id == collection->usage) {
 318                         collection_index = i;
 319                         break;
 320                 }
 321         }
 322         if (collection_index == -1)
 323                 goto err_ret;
 324
 325         report_enum = &hdev->report_enum[type];
 326         list_for_each_entry(report, &report_enum->report_list, list) {
 327                 for (i = 0; i < report->maxfield; ++i) {
 328                         field = report->field[i];
 329                         if (field->physical == usage_id &&
 330                                 field->logical == attr_usage_id) {
 331                                 sensor_hub_fill_attr_info(info, i, report->id,
 332                                                           field);
 333                                 ret = 0;
 334                         } else {
 335                                 for (j = 0; j < field->maxusage; ++j) {
 336                                         if (field->usage[j].hid ==
 337                                         attr_usage_id &&
 338                                         field->usage[j].collection_index ==
 339                                         collection_index) {
 340                                                 sensor_hub_fill_attr_info(info,
 341                                                           i, report->id, field);
 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 *
 429                                         report->field[i]->report_count)/8);
 430                 sz = (report->field[i]->report_size *
 431                                         report->field[i]->report_count)/8;
 432                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 433                                 report->field[i]->usage->hid) {
 434                         hid_dbg(hdev, "data was pending ...\n");
 435                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
 436                         if (pdata->pending.raw_data)
 437                                 pdata->pending.raw_size = sz;
 438                         else
 439                                 pdata->pending.raw_size = 0;
 440                         complete(&pdata->pending.ready);
 441                 }
 442                 collection = &hdev->collection[
 443                                 report->field[i]->usage->collection_index];
 444                 hid_dbg(hdev, "collection->usage %x\n",
 445                                         collection->usage);
 446                 callback = sensor_hub_get_callback(pdata->hsdev->hdev,
 447                                                 report->field[i]->physical,
 448                                                         &priv);
 449                 if (callback && callback->capture_sample) {
 450                         if (report->field[i]->logical)
 451                                 callback->capture_sample(pdata->hsdev,
 452                                         report->field[i]->logical, sz, ptr,
 453                                         callback->pdev);
 454                         else
 455                                 callback->capture_sample(pdata->hsdev,
 456                                         report->field[i]->usage->hid, sz, ptr,
 457                                         callback->pdev);
 458                 }
 459                 ptr += sz;
 460         }
 461         if (callback && collection && callback->send_event)
 462                 callback->send_event(pdata->hsdev, collection->usage,
 463                                 callback->pdev);
 464         spin_unlock_irqrestore(&pdata->lock, flags);
 465
 466         return 1;
 467 }
 468
 469 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
 470 {
 471         int ret = 0;
 472         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 473
 474         mutex_lock(&data->mutex);
 475         if (!hsdev->ref_cnt) {
 476                 ret = hid_hw_open(hsdev->hdev);
 477                 if (ret) {
 478                         hid_err(hsdev->hdev, "failed to open hid device\n");
 479                         mutex_unlock(&data->mutex);
 480                         return ret;
 481                 }
 482         }
 483         hsdev->ref_cnt++;
 484         mutex_unlock(&data->mutex);
 485
 486         return ret;
 487 }
 488 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
 489
 490 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
 491 {
 492         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 493
 494         mutex_lock(&data->mutex);
 495         hsdev->ref_cnt--;
 496         if (!hsdev->ref_cnt)
 497                 hid_hw_close(hsdev->hdev);
 498         mutex_unlock(&data->mutex);
 499 }
 500 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 501
 502 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 503                 unsigned int *rsize)
 504 {
 505         int index;
 506         struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
 507         unsigned char report_block[] = {
 508                                 0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
 509         unsigned char power_block[] = {
 510                                 0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
 511
 512         if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
 513                 hid_dbg(hdev, "No Enum quirks\n");
 514                 return rdesc;
 515         }
 516
 517         /* Looks for power and report state usage id and force to 1 */
 518         for (index = 0; index < *rsize; ++index) {
 519                 if (((*rsize - index) > sizeof(report_block)) &&
 520                         !memcmp(&rdesc[index], report_block,
 521                                                 sizeof(report_block))) {
 522                         rdesc[index + 4] = 0x01;
 523                         index += sizeof(report_block);
 524                 }
 525                 if (((*rsize - index) > sizeof(power_block)) &&
 526                         !memcmp(&rdesc[index], power_block,
 527                                                 sizeof(power_block))) {
 528                         rdesc[index + 4] = 0x01;
 529                         index += sizeof(power_block);
 530                 }
 531         }
 532
 533         return rdesc;
 534 }
 535
 536 static int sensor_hub_probe(struct hid_device *hdev,
 537                                 const struct hid_device_id *id)
 538 {
 539         int ret;
 540         struct sensor_hub_data *sd;
 541         int i;
 542         char *name;
 543         struct hid_report *report;
 544         struct hid_report_enum *report_enum;
 545         struct hid_field *field;
 546         int dev_cnt;
 547
 548         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
 549         if (!sd) {
 550                 hid_err(hdev, "cannot allocate Sensor data\n");
 551                 return -ENOMEM;
 552         }
 553         sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL);
 554         if (!sd->hsdev) {
 555                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 556                 return -ENOMEM;
 557         }
 558         hid_set_drvdata(hdev, sd);
 559         sd->quirks = id->driver_data;
 560         sd->hsdev->hdev = hdev;
 561         sd->hsdev->vendor_id = hdev->vendor;
 562         sd->hsdev->product_id = hdev->product;
 563         spin_lock_init(&sd->lock);
 564         spin_lock_init(&sd->dyn_callback_lock);
 565         mutex_init(&sd->mutex);
 566         ret = hid_parse(hdev);
 567         if (ret) {
 568                 hid_err(hdev, "parse failed\n");
 569                 return ret;
 570         }
 571         INIT_LIST_HEAD(&hdev->inputs);
 572
 573         ret = hid_hw_start(hdev, 0);
 574         if (ret) {
 575                 hid_err(hdev, "hw start failed\n");
 576                 return ret;
 577         }
 578         INIT_LIST_HEAD(&sd->dyn_callback_list);
 579         sd->hid_sensor_client_cnt = 0;
 580         report_enum = &hdev->report_enum[HID_INPUT_REPORT];
 581
 582         dev_cnt = sensor_hub_get_physical_device_count(report_enum);
 583         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 584                 hid_err(hdev, "Invalid Physical device count\n");
 585                 ret = -EINVAL;
 586                 goto err_stop_hw;
 587         }
 588         sd->hid_sensor_hub_client_devs = kzalloc(dev_cnt *
 589                                                 sizeof(struct mfd_cell),
 590                                                 GFP_KERNEL);
 591         if (sd->hid_sensor_hub_client_devs == NULL) {
 592                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 593                         ret = -ENOMEM;
 594                         goto err_stop_hw;
 595         }
 596         list_for_each_entry(report, &report_enum->report_list, list) {
 597                 hid_dbg(hdev, "Report id:%x\n", report->id);
 598                 field = report->field[0];
 599                 if (report->maxfield && field &&
 600                                         field->physical) {
 601                         name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
 602                                                 field->physical);
 603                         if (name == NULL) {
 604                                 hid_err(hdev, "Failed MFD device name\n");
 605                                         ret = -ENOMEM;
 606                                         goto err_free_names;
 607                         }
 608                         sd->hid_sensor_hub_client_devs[
 609                                 sd->hid_sensor_client_cnt].id = PLATFORM_DEVID_AUTO;
 610                         sd->hid_sensor_hub_client_devs[
 611                                 sd->hid_sensor_client_cnt].name = name;
 612                         sd->hid_sensor_hub_client_devs[
 613                                 sd->hid_sensor_client_cnt].platform_data =
 614                                                 sd->hsdev;
 615                         sd->hid_sensor_hub_client_devs[
 616                                 sd->hid_sensor_client_cnt].pdata_size =
 617                                                 sizeof(*sd->hsdev);
 618                         hid_dbg(hdev, "Adding %s:%p\n", name, sd);
 619                         sd->hid_sensor_client_cnt++;
 620                 }
 621         }
 622         ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
 623                 sd->hid_sensor_client_cnt, NULL, 0, NULL);
 624         if (ret < 0)
 625                 goto err_free_names;
 626
 627         return ret;
 628
 629 err_free_names:
 630         for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
 631                 kfree(sd->hid_sensor_hub_client_devs[i].name);
 632         kfree(sd->hid_sensor_hub_client_devs);
 633 err_stop_hw:
 634         hid_hw_stop(hdev);
 635
 636         return ret;
 637 }
 638
 639 static void sensor_hub_remove(struct hid_device *hdev)
 640 {
 641         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 642         unsigned long flags;
 643         int i;
 644
 645         hid_dbg(hdev, " hardware removed\n");
 646         hid_hw_close(hdev);
 647         hid_hw_stop(hdev);
 648         spin_lock_irqsave(&data->lock, flags);
 649         if (data->pending.status)
 650                 complete(&data->pending.ready);
 651         spin_unlock_irqrestore(&data->lock, flags);
 652         mfd_remove_devices(&hdev->dev);
 653         for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
 654                 kfree(data->hid_sensor_hub_client_devs[i].name);
 655         kfree(data->hid_sensor_hub_client_devs);
 656         hid_set_drvdata(hdev, NULL);
 657         mutex_destroy(&data->mutex);
 658 }
 659
 660 static const struct hid_device_id sensor_hub_devices[] = {
 661         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
 662                         USB_DEVICE_ID_INTEL_HID_SENSOR),
 663                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 664         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
 665                         USB_DEVICE_ID_INTEL_HID_SENSOR),
 666                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 667         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
 668                         USB_DEVICE_ID_STM_HID_SENSOR),
 669                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 670         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 671                      HID_ANY_ID) },
 672         { }
 673 };
 674 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 675
 676 static struct hid_driver sensor_hub_driver = {
 677         .name = "hid-sensor-hub",
 678         .id_table = sensor_hub_devices,
 679         .probe = sensor_hub_probe,
 680         .remove = sensor_hub_remove,
 681         .raw_event = sensor_hub_raw_event,
 682         .report_fixup = sensor_hub_report_fixup,
 683 #ifdef CONFIG_PM
 684         .suspend = sensor_hub_suspend,
 685         .resume = sensor_hub_resume,
 686         .reset_resume = sensor_hub_reset_resume,
 687 #endif
 688 };
 689 module_hid_driver(sensor_hub_driver);
 690
 691 MODULE_DESCRIPTION("HID Sensor Hub driver");
 692 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 693 MODULE_LICENSE("GPL");