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  * @ref_cnt:            Number of MFD clients have opened this device
  60  */
  61 struct sensor_hub_data {
  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         int ref_cnt;
  71 };
  72
  73 /**
  74  * struct hid_sensor_hub_callbacks_list - Stores callback list
  75  * @list:               list head.
  76  * @usage_id:           usage id for a physical device.
  77  * @usage_callback:     Stores registered callback functions.
  78  * @priv:               Private data for a physical device.
  79  */
  80 struct hid_sensor_hub_callbacks_list {
  81         struct list_head list;
  82         u32 usage_id;
  83         struct hid_sensor_hub_device *hsdev;
  84         struct hid_sensor_hub_callbacks *usage_callback;
  85         void *priv;
  86 };
  87
  88 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  89                                                 int dir)
  90 {
  91         struct hid_report *report;
  92
  93         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  94                 if (report->id == id)
  95                         return report;
  96         }
  97         hid_warn(hdev, "No report with id 0x%x found\n", id);
  98
  99         return NULL;
 100 }
 101
 102 static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
 103 {
 104         int i;
 105         int count = 0;
 106
 107         for (i = 0; i < hdev->maxcollection; ++i) {
 108                 struct hid_collection *collection = &hdev->collection[i];
 109                 if (collection->type == HID_COLLECTION_PHYSICAL)
 110                         ++count;
 111         }
 112
 113         return count;
 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,
 132                                         int collection_index,
 133                                         struct hid_sensor_hub_device **hsdev,
 134                                         void **priv)
 135 {
 136         struct hid_sensor_hub_callbacks_list *callback;
 137         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 138
 139         spin_lock(&pdata->dyn_callback_lock);
 140         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 141                 if (callback->usage_id == usage_id &&
 142                         (collection_index >=
 143                                 callback->hsdev->start_collection_index) &&
 144                         (collection_index <
 145                                 callback->hsdev->end_collection_index)) {
 146                         *priv = callback->priv;
 147                         *hsdev = callback->hsdev;
 148                         spin_unlock(&pdata->dyn_callback_lock);
 149                         return callback->usage_callback;
 150                 }
 151         spin_unlock(&pdata->dyn_callback_lock);
 152
 153         return NULL;
 154 }
 155
 156 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 157                         u32 usage_id,
 158                         struct hid_sensor_hub_callbacks *usage_callback)
 159 {
 160         struct hid_sensor_hub_callbacks_list *callback;
 161         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 162         unsigned long flags;
 163
 164         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 165         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 166                 if (callback->usage_id == usage_id &&
 167                                                 callback->hsdev == hsdev) {
 168                         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 169                         return -EINVAL;
 170                 }
 171         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 172         if (!callback) {
 173                 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 174                 return -ENOMEM;
 175         }
 176         callback->hsdev = hsdev;
 177         callback->usage_callback = usage_callback;
 178         callback->usage_id = usage_id;
 179         callback->priv = NULL;
 180         list_add_tail(&callback->list, &pdata->dyn_callback_list);
 181         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 182
 183         return 0;
 184 }
 185 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 186
 187 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 188                                 u32 usage_id)
 189 {
 190         struct hid_sensor_hub_callbacks_list *callback;
 191         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 195         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 196                 if (callback->usage_id == usage_id &&
 197                                                 callback->hsdev == hsdev) {
 198                         list_del(&callback->list);
 199                         kfree(callback);
 200                         break;
 201                 }
 202         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 203
 204         return 0;
 205 }
 206 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 207
 208 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 209                                 u32 field_index, s32 value)
 210 {
 211         struct hid_report *report;
 212         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 213         int ret = 0;
 214
 215         mutex_lock(&data->mutex);
 216         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 217         if (!report || (field_index >= report->maxfield)) {
 218                 ret = -EINVAL;
 219                 goto done_proc;
 220         }
 221         hid_set_field(report->field[field_index], 0, value);
 222         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 223         hid_hw_wait(hsdev->hdev);
 224
 225 done_proc:
 226         mutex_unlock(&data->mutex);
 227
 228         return ret;
 229 }
 230 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 231
 232 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 233                                 u32 field_index, s32 *value)
 234 {
 235         struct hid_report *report;
 236         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 237         int ret = 0;
 238
 239         mutex_lock(&data->mutex);
 240         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 241         if (!report || (field_index >= report->maxfield) ||
 242             report->field[field_index]->report_count < 1) {
 243                 ret = -EINVAL;
 244                 goto done_proc;
 245         }
 246         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 247         hid_hw_wait(hsdev->hdev);
 248         *value = report->field[field_index]->value[0];
 249
 250 done_proc:
 251         mutex_unlock(&data->mutex);
 252
 253         return ret;
 254 }
 255 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 256
 257
 258 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 259                                         u32 usage_id,
 260                                         u32 attr_usage_id, u32 report_id)
 261 {
 262         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 263         unsigned long flags;
 264         struct hid_report *report;
 265         int ret_val = 0;
 266
 267         mutex_lock(&data->mutex);
 268         memset(&data->pending, 0, sizeof(data->pending));
 269         init_completion(&data->pending.ready);
 270         data->pending.usage_id = usage_id;
 271         data->pending.attr_usage_id = attr_usage_id;
 272         data->pending.raw_size = 0;
 273
 274         spin_lock_irqsave(&data->lock, flags);
 275         data->pending.status = true;
 276         spin_unlock_irqrestore(&data->lock, flags);
 277         report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
 278         if (!report)
 279                 goto err_free;
 280
 281         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 282         wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
 283         switch (data->pending.raw_size) {
 284         case 1:
 285                 ret_val = *(u8 *)data->pending.raw_data;
 286                 break;
 287         case 2:
 288                 ret_val = *(u16 *)data->pending.raw_data;
 289                 break;
 290         case 4:
 291                 ret_val = *(u32 *)data->pending.raw_data;
 292                 break;
 293         default:
 294                 ret_val = 0;
 295         }
 296         kfree(data->pending.raw_data);
 297
 298 err_free:
 299         data->pending.status = false;
 300         mutex_unlock(&data->mutex);
 301
 302         return ret_val;
 303 }
 304 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 305
 306 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
 307                                 u32 report_id, int field_index, u32 usage_id)
 308 {
 309         struct hid_report *report;
 310         struct hid_field *field;
 311         int i;
 312
 313         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 314         if (!report || (field_index >= report->maxfield))
 315                 goto done_proc;
 316
 317         field = report->field[field_index];
 318         for (i = 0; i < field->maxusage; ++i) {
 319                 if (field->usage[i].hid == usage_id)
 320                         return field->usage[i].usage_index;
 321         }
 322
 323 done_proc:
 324         return -EINVAL;
 325 }
 326 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
 327
 328 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 329                                 u8 type,
 330                                 u32 usage_id,
 331                                 u32 attr_usage_id,
 332                                 struct hid_sensor_hub_attribute_info *info)
 333 {
 334         int ret = -1;
 335         int i;
 336         struct hid_report *report;
 337         struct hid_field *field;
 338         struct hid_report_enum *report_enum;
 339         struct hid_device *hdev = hsdev->hdev;
 340
 341         /* Initialize with defaults */
 342         info->usage_id = usage_id;
 343         info->attrib_id = attr_usage_id;
 344         info->report_id = -1;
 345         info->index = -1;
 346         info->units = -1;
 347         info->unit_expo = -1;
 348
 349         report_enum = &hdev->report_enum[type];
 350         list_for_each_entry(report, &report_enum->report_list, list) {
 351                 for (i = 0; i < report->maxfield; ++i) {
 352                         field = report->field[i];
 353                         if (field->maxusage) {
 354                                 if (field->physical == usage_id &&
 355                                         (field->logical == attr_usage_id ||
 356                                         field->usage[0].hid ==
 357                                                         attr_usage_id) &&
 358                                         (field->usage[0].collection_index >=
 359                                         hsdev->start_collection_index) &&
 360                                         (field->usage[0].collection_index <
 361                                         hsdev->end_collection_index)) {
 362
 363                                         sensor_hub_fill_attr_info(info, i,
 364                                                                 report->id,
 365                                                                 field);
 366                                         ret = 0;
 367                                         break;
 368                                 }
 369                         }
 370                 }
 371
 372         }
 373
 374         return ret;
 375 }
 376 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 377
 378 #ifdef CONFIG_PM
 379 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 380 {
 381         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 382         struct hid_sensor_hub_callbacks_list *callback;
 383         unsigned long flags;
 384
 385         hid_dbg(hdev, " sensor_hub_suspend\n");
 386         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 387         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 388                 if (callback->usage_callback->suspend)
 389                         callback->usage_callback->suspend(
 390                                         callback->hsdev, callback->priv);
 391         }
 392         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 393
 394         return 0;
 395 }
 396
 397 static int sensor_hub_resume(struct hid_device *hdev)
 398 {
 399         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 400         struct hid_sensor_hub_callbacks_list *callback;
 401         unsigned long flags;
 402
 403         hid_dbg(hdev, " sensor_hub_resume\n");
 404         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 405         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 406                 if (callback->usage_callback->resume)
 407                         callback->usage_callback->resume(
 408                                         callback->hsdev, callback->priv);
 409         }
 410         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 411
 412         return 0;
 413 }
 414
 415 static int sensor_hub_reset_resume(struct hid_device *hdev)
 416 {
 417         return 0;
 418 }
 419 #endif
 420
 421 /*
 422  * Handle raw report as sent by device
 423  */
 424 static int sensor_hub_raw_event(struct hid_device *hdev,
 425                 struct hid_report *report, u8 *raw_data, int size)
 426 {
 427         int i;
 428         u8 *ptr;
 429         int sz;
 430         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 431         unsigned long flags;
 432         struct hid_sensor_hub_callbacks *callback = NULL;
 433         struct hid_collection *collection = NULL;
 434         void *priv = NULL;
 435         struct hid_sensor_hub_device *hsdev = NULL;
 436
 437         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 438                          report->id, size, report->type);
 439         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 440         if (report->type != HID_INPUT_REPORT)
 441                 return 1;
 442
 443         ptr = raw_data;
 444         ptr++; /* Skip report id */
 445
 446         spin_lock_irqsave(&pdata->lock, flags);
 447
 448         for (i = 0; i < report->maxfield; ++i) {
 449                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 450                                 i, report->field[i]->usage->collection_index,
 451                                 report->field[i]->usage->hid,
 452                                 (report->field[i]->report_size *
 453                                         report->field[i]->report_count)/8);
 454                 sz = (report->field[i]->report_size *
 455                                         report->field[i]->report_count)/8;
 456                 if (pdata->pending.status && pdata->pending.attr_usage_id ==
 457                                 report->field[i]->usage->hid) {
 458                         hid_dbg(hdev, "data was pending ...\n");
 459                         pdata->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
 460                         if (pdata->pending.raw_data)
 461                                 pdata->pending.raw_size = sz;
 462                         else
 463                                 pdata->pending.raw_size = 0;
 464                         complete(&pdata->pending.ready);
 465                 }
 466                 collection = &hdev->collection[
 467                                 report->field[i]->usage->collection_index];
 468                 hid_dbg(hdev, "collection->usage %x\n",
 469                                         collection->usage);
 470
 471                 callback = sensor_hub_get_callback(hdev,
 472                                 report->field[i]->physical,
 473                                 report->field[i]->usage[0].collection_index,
 474                                 &hsdev, &priv);
 475
 476                 if (callback && callback->capture_sample) {
 477                         if (report->field[i]->logical)
 478                                 callback->capture_sample(hsdev,
 479                                         report->field[i]->logical, sz, ptr,
 480                                         callback->pdev);
 481                         else
 482                                 callback->capture_sample(hsdev,
 483                                         report->field[i]->usage->hid, sz, ptr,
 484                                         callback->pdev);
 485                 }
 486                 ptr += sz;
 487         }
 488         if (callback && collection && callback->send_event)
 489                 callback->send_event(hsdev, collection->usage,
 490                                 callback->pdev);
 491         spin_unlock_irqrestore(&pdata->lock, flags);
 492
 493         return 1;
 494 }
 495
 496 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
 497 {
 498         int ret = 0;
 499         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 500
 501         mutex_lock(&data->mutex);
 502         if (!data->ref_cnt) {
 503                 ret = hid_hw_open(hsdev->hdev);
 504                 if (ret) {
 505                         hid_err(hsdev->hdev, "failed to open hid device\n");
 506                         mutex_unlock(&data->mutex);
 507                         return ret;
 508                 }
 509         }
 510         data->ref_cnt++;
 511         mutex_unlock(&data->mutex);
 512
 513         return ret;
 514 }
 515 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
 516
 517 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
 518 {
 519         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 520
 521         mutex_lock(&data->mutex);
 522         data->ref_cnt--;
 523         if (!data->ref_cnt)
 524                 hid_hw_close(hsdev->hdev);
 525         mutex_unlock(&data->mutex);
 526 }
 527 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 528
 529 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 530                 unsigned int *rsize)
 531 {
 532         int index;
 533         struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
 534         unsigned char report_block[] = {
 535                                 0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
 536         unsigned char power_block[] = {
 537                                 0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
 538
 539         if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
 540                 hid_dbg(hdev, "No Enum quirks\n");
 541                 return rdesc;
 542         }
 543
 544         /* Looks for power and report state usage id and force to 1 */
 545         for (index = 0; index < *rsize; ++index) {
 546                 if (((*rsize - index) > sizeof(report_block)) &&
 547                         !memcmp(&rdesc[index], report_block,
 548                                                 sizeof(report_block))) {
 549                         rdesc[index + 4] = 0x01;
 550                         index += sizeof(report_block);
 551                 }
 552                 if (((*rsize - index) > sizeof(power_block)) &&
 553                         !memcmp(&rdesc[index], power_block,
 554                                                 sizeof(power_block))) {
 555                         rdesc[index + 4] = 0x01;
 556                         index += sizeof(power_block);
 557                 }
 558         }
 559
 560         return rdesc;
 561 }
 562
 563 static int sensor_hub_probe(struct hid_device *hdev,
 564                                 const struct hid_device_id *id)
 565 {
 566         int ret;
 567         struct sensor_hub_data *sd;
 568         int i;
 569         char *name;
 570         int dev_cnt;
 571         struct hid_sensor_hub_device *hsdev;
 572         struct hid_sensor_hub_device *last_hsdev = NULL;
 573
 574         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
 575         if (!sd) {
 576                 hid_err(hdev, "cannot allocate Sensor data\n");
 577                 return -ENOMEM;
 578         }
 579
 580         hid_set_drvdata(hdev, sd);
 581         sd->quirks = id->driver_data;
 582
 583         spin_lock_init(&sd->lock);
 584         spin_lock_init(&sd->dyn_callback_lock);
 585         mutex_init(&sd->mutex);
 586         ret = hid_parse(hdev);
 587         if (ret) {
 588                 hid_err(hdev, "parse failed\n");
 589                 return ret;
 590         }
 591         INIT_LIST_HEAD(&hdev->inputs);
 592
 593         ret = hid_hw_start(hdev, 0);
 594         if (ret) {
 595                 hid_err(hdev, "hw start failed\n");
 596                 return ret;
 597         }
 598         INIT_LIST_HEAD(&sd->dyn_callback_list);
 599         sd->hid_sensor_client_cnt = 0;
 600
 601         dev_cnt = sensor_hub_get_physical_device_count(hdev);
 602         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 603                 hid_err(hdev, "Invalid Physical device count\n");
 604                 ret = -EINVAL;
 605                 goto err_stop_hw;
 606         }
 607         sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt *
 608                                                       sizeof(struct mfd_cell),
 609                                                       GFP_KERNEL);
 610         if (sd->hid_sensor_hub_client_devs == NULL) {
 611                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 612                         ret = -ENOMEM;
 613                         goto err_stop_hw;
 614         }
 615
 616         for (i = 0; i < hdev->maxcollection; ++i) {
 617                 struct hid_collection *collection = &hdev->collection[i];
 618
 619                 if (collection->type == HID_COLLECTION_PHYSICAL) {
 620
 621                         hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
 622                                              GFP_KERNEL);
 623                         if (!hsdev) {
 624                                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 625                                 ret = -ENOMEM;
 626                                 goto err_stop_hw;
 627                         }
 628                         hsdev->hdev = hdev;
 629                         hsdev->vendor_id = hdev->vendor;
 630                         hsdev->product_id = hdev->product;
 631                         hsdev->start_collection_index = i;
 632                         if (last_hsdev)
 633                                 last_hsdev->end_collection_index = i;
 634                         last_hsdev = hsdev;
 635                         name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
 636                                               "HID-SENSOR-%x",
 637                                               collection->usage);
 638                         if (name == NULL) {
 639                                 hid_err(hdev, "Failed MFD device name\n");
 640                                         ret = -ENOMEM;
 641                                         goto err_stop_hw;
 642                         }
 643                         sd->hid_sensor_hub_client_devs[
 644                                 sd->hid_sensor_client_cnt].name = name;
 645                         sd->hid_sensor_hub_client_devs[
 646                                 sd->hid_sensor_client_cnt].platform_data =
 647                                                         hsdev;
 648                         sd->hid_sensor_hub_client_devs[
 649                                 sd->hid_sensor_client_cnt].pdata_size =
 650                                                         sizeof(*hsdev);
 651                         hid_dbg(hdev, "Adding %s:%d\n", name,
 652                                         hsdev->start_collection_index);
 653                         sd->hid_sensor_client_cnt++;
 654                 }
 655         }
 656         if (last_hsdev)
 657                 last_hsdev->end_collection_index = i;
 658
 659         ret = mfd_add_hotplug_devices(&hdev->dev,
 660                         sd->hid_sensor_hub_client_devs,
 661                         sd->hid_sensor_client_cnt);
 662         if (ret < 0)
 663                 goto err_stop_hw;
 664
 665         return ret;
 666
 667 err_stop_hw:
 668         hid_hw_stop(hdev);
 669
 670         return ret;
 671 }
 672
 673 static void sensor_hub_remove(struct hid_device *hdev)
 674 {
 675         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 676         unsigned long flags;
 677
 678         hid_dbg(hdev, " hardware removed\n");
 679         hid_hw_close(hdev);
 680         hid_hw_stop(hdev);
 681         spin_lock_irqsave(&data->lock, flags);
 682         if (data->pending.status)
 683                 complete(&data->pending.ready);
 684         spin_unlock_irqrestore(&data->lock, flags);
 685         mfd_remove_devices(&hdev->dev);
 686         hid_set_drvdata(hdev, NULL);
 687         mutex_destroy(&data->mutex);
 688 }
 689
 690 static const struct hid_device_id sensor_hub_devices[] = {
 691         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
 692                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
 693                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 694         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
 695                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
 696                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 697         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
 698                         USB_DEVICE_ID_INTEL_HID_SENSOR_1),
 699                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 700         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
 701                         USB_DEVICE_ID_MS_SURFACE_PRO_2),
 702                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 703         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
 704                         USB_DEVICE_ID_MS_TOUCH_COVER_2),
 705                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 706         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
 707                         USB_DEVICE_ID_MS_TYPE_COVER_2),
 708                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 709         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
 710                         USB_DEVICE_ID_STM_HID_SENSOR),
 711                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 712         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
 713                         USB_DEVICE_ID_STM_HID_SENSOR_1),
 714                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 715         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
 716                         USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
 717                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 718         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 719                      HID_ANY_ID) },
 720         { }
 721 };
 722 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 723
 724 static struct hid_driver sensor_hub_driver = {
 725         .name = "hid-sensor-hub",
 726         .id_table = sensor_hub_devices,
 727         .probe = sensor_hub_probe,
 728         .remove = sensor_hub_remove,
 729         .raw_event = sensor_hub_raw_event,
 730         .report_fixup = sensor_hub_report_fixup,
 731 #ifdef CONFIG_PM
 732         .suspend = sensor_hub_suspend,
 733         .resume = sensor_hub_resume,
 734         .reset_resume = sensor_hub_reset_resume,
 735 #endif
 736 };
 737 module_hid_driver(sensor_hub_driver);
 738
 739 MODULE_DESCRIPTION("HID Sensor Hub driver");
 740 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 741 MODULE_LICENSE("GPL");