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