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_data - Hold a instance data for a HID hub device
  33  * @hsdev:              Stored hid instance for current hub device.
  34  * @mutex:              Mutex to serialize synchronous request.
  35  * @lock:               Spin lock to protect pending request structure.
  36  * @dyn_callback_list:  Holds callback function
  37  * @dyn_callback_lock:  spin lock to protect callback list
  38  * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
  39  * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
  40  * @ref_cnt:            Number of MFD clients have opened this device
  41  */
  42 struct sensor_hub_data {
  43         struct mutex mutex;
  44         spinlock_t lock;
  45         struct list_head dyn_callback_list;
  46         spinlock_t dyn_callback_lock;
  47         struct mfd_cell *hid_sensor_hub_client_devs;
  48         int hid_sensor_client_cnt;
  49         unsigned long quirks;
  50         int ref_cnt;
  51 };
  52
  53 /**
  54  * struct hid_sensor_hub_callbacks_list - Stores callback list
  55  * @list:               list head.
  56  * @usage_id:           usage id for a physical device.
  57  * @usage_callback:     Stores registered callback functions.
  58  * @priv:               Private data for a physical device.
  59  */
  60 struct hid_sensor_hub_callbacks_list {
  61         struct list_head list;
  62         u32 usage_id;
  63         struct hid_sensor_hub_device *hsdev;
  64         struct hid_sensor_hub_callbacks *usage_callback;
  65         void *priv;
  66 };
  67
  68 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
  69                                                 int dir)
  70 {
  71         struct hid_report *report;
  72
  73         list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
  74                 if (report->id == id)
  75                         return report;
  76         }
  77         hid_warn(hdev, "No report with id 0x%x found\n", id);
  78
  79         return NULL;
  80 }
  81
  82 static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
  83 {
  84         int i;
  85         int count = 0;
  86
  87         for (i = 0; i < hdev->maxcollection; ++i) {
  88                 struct hid_collection *collection = &hdev->collection[i];
  89                 if (collection->type == HID_COLLECTION_PHYSICAL ||
  90                     collection->type == HID_COLLECTION_APPLICATION)
  91                         ++count;
  92         }
  93
  94         return count;
  95 }
  96
  97 static void sensor_hub_fill_attr_info(
  98                 struct hid_sensor_hub_attribute_info *info,
  99                 s32 index, s32 report_id, struct hid_field *field)
 100 {
 101         info->index = index;
 102         info->report_id = report_id;
 103         info->units = field->unit;
 104         info->unit_expo = field->unit_exponent;
 105         info->size = (field->report_size * field->report_count)/8;
 106         info->logical_minimum = field->logical_minimum;
 107         info->logical_maximum = field->logical_maximum;
 108 }
 109
 110 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
 111                                         struct hid_device *hdev,
 112                                         u32 usage_id,
 113                                         int collection_index,
 114                                         struct hid_sensor_hub_device **hsdev,
 115                                         void **priv)
 116 {
 117         struct hid_sensor_hub_callbacks_list *callback;
 118         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 119
 120         spin_lock(&pdata->dyn_callback_lock);
 121         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 122                 if ((callback->usage_id == usage_id ||
 123                      callback->usage_id == HID_USAGE_SENSOR_COLLECTION) &&
 124                         (collection_index >=
 125                                 callback->hsdev->start_collection_index) &&
 126                         (collection_index <
 127                                 callback->hsdev->end_collection_index)) {
 128                         *priv = callback->priv;
 129                         *hsdev = callback->hsdev;
 130                         spin_unlock(&pdata->dyn_callback_lock);
 131                         return callback->usage_callback;
 132                 }
 133         spin_unlock(&pdata->dyn_callback_lock);
 134
 135         return NULL;
 136 }
 137
 138 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
 139                         u32 usage_id,
 140                         struct hid_sensor_hub_callbacks *usage_callback)
 141 {
 142         struct hid_sensor_hub_callbacks_list *callback;
 143         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 144         unsigned long flags;
 145
 146         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 147         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 148                 if (callback->usage_id == usage_id &&
 149                                                 callback->hsdev == hsdev) {
 150                         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 151                         return -EINVAL;
 152                 }
 153         callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
 154         if (!callback) {
 155                 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 156                 return -ENOMEM;
 157         }
 158         callback->hsdev = hsdev;
 159         callback->usage_callback = usage_callback;
 160         callback->usage_id = usage_id;
 161         callback->priv = NULL;
 162         /*
 163          * If there is a handler registered for the collection type, then
 164          * it will handle all reports for sensors in this collection. If
 165          * there is also an individual sensor handler registration, then
 166          * we want to make sure that the reports are directed to collection
 167          * handler, as this may be a fusion sensor. So add collection handlers
 168          * to the beginning of the list, so that they are matched first.
 169          */
 170         if (usage_id == HID_USAGE_SENSOR_COLLECTION)
 171                 list_add(&callback->list, &pdata->dyn_callback_list);
 172         else
 173                 list_add_tail(&callback->list, &pdata->dyn_callback_list);
 174         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 175
 176         return 0;
 177 }
 178 EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 179
 180 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
 181                                 u32 usage_id)
 182 {
 183         struct hid_sensor_hub_callbacks_list *callback;
 184         struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
 185         unsigned long flags;
 186
 187         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 188         list_for_each_entry(callback, &pdata->dyn_callback_list, list)
 189                 if (callback->usage_id == usage_id &&
 190                                                 callback->hsdev == hsdev) {
 191                         list_del(&callback->list);
 192                         kfree(callback);
 193                         break;
 194                 }
 195         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 196
 197         return 0;
 198 }
 199 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 200
 201 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 202                            u32 field_index, int buffer_size, void *buffer)
 203 {
 204         struct hid_report *report;
 205         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 206         __s32 *buf32 = buffer;
 207         int i = 0;
 208         int remaining_bytes;
 209         __s32 value;
 210         int ret = 0;
 211
 212         mutex_lock(&data->mutex);
 213         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 214         if (!report || (field_index >= report->maxfield)) {
 215                 ret = -EINVAL;
 216                 goto done_proc;
 217         }
 218
 219         remaining_bytes = do_div(buffer_size, sizeof(__s32));
 220         if (buffer_size) {
 221                 for (i = 0; i < buffer_size; ++i) {
 222                         hid_set_field(report->field[field_index], i,
 223                                       cpu_to_le32(*buf32));
 224                         ++buf32;
 225                 }
 226         }
 227         if (remaining_bytes) {
 228                 value = 0;
 229                 memcpy(&value, (u8 *)buf32, remaining_bytes);
 230                 hid_set_field(report->field[field_index], i,
 231                               cpu_to_le32(value));
 232         }
 233         hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
 234         hid_hw_wait(hsdev->hdev);
 235
 236 done_proc:
 237         mutex_unlock(&data->mutex);
 238
 239         return ret;
 240 }
 241 EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 242
 243 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
 244                            u32 field_index, int buffer_size, void *buffer)
 245 {
 246         struct hid_report *report;
 247         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 248         int report_size;
 249         int ret = 0;
 250
 251         mutex_lock(&data->mutex);
 252         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 253         if (!report || (field_index >= report->maxfield) ||
 254             report->field[field_index]->report_count < 1) {
 255                 ret = -EINVAL;
 256                 goto done_proc;
 257         }
 258         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 259         hid_hw_wait(hsdev->hdev);
 260
 261         /* calculate number of bytes required to read this field */
 262         report_size = DIV_ROUND_UP(report->field[field_index]->report_size,
 263                                    8) *
 264                                    report->field[field_index]->report_count;
 265         if (!report_size) {
 266                 ret = -EINVAL;
 267                 goto done_proc;
 268         }
 269         ret = min(report_size, buffer_size);
 270         memcpy(buffer, report->field[field_index]->value, ret);
 271
 272 done_proc:
 273         mutex_unlock(&data->mutex);
 274
 275         return ret;
 276 }
 277 EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 278
 279
 280 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
 281                                         u32 usage_id,
 282                                         u32 attr_usage_id, u32 report_id,
 283                                         enum sensor_hub_read_flags flag)
 284 {
 285         struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
 286         unsigned long flags;
 287         struct hid_report *report;
 288         int ret_val = 0;
 289
 290         report = sensor_hub_report(report_id, hsdev->hdev,
 291                                    HID_INPUT_REPORT);
 292         if (!report)
 293                 return -EINVAL;
 294
 295         mutex_lock(&hsdev->mutex);
 296         if (flag == SENSOR_HUB_SYNC) {
 297                 memset(&hsdev->pending, 0, sizeof(hsdev->pending));
 298                 init_completion(&hsdev->pending.ready);
 299                 hsdev->pending.usage_id = usage_id;
 300                 hsdev->pending.attr_usage_id = attr_usage_id;
 301                 hsdev->pending.raw_size = 0;
 302
 303                 spin_lock_irqsave(&data->lock, flags);
 304                 hsdev->pending.status = true;
 305                 spin_unlock_irqrestore(&data->lock, flags);
 306         }
 307         mutex_lock(&data->mutex);
 308         hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
 309         mutex_unlock(&data->mutex);
 310         if (flag == SENSOR_HUB_SYNC) {
 311                 wait_for_completion_interruptible_timeout(
 312                                                 &hsdev->pending.ready, HZ*5);
 313                 switch (hsdev->pending.raw_size) {
 314                 case 1:
 315                         ret_val = *(u8 *)hsdev->pending.raw_data;
 316                         break;
 317                 case 2:
 318                         ret_val = *(u16 *)hsdev->pending.raw_data;
 319                         break;
 320                 case 4:
 321                         ret_val = *(u32 *)hsdev->pending.raw_data;
 322                         break;
 323                 default:
 324                         ret_val = 0;
 325                 }
 326                 kfree(hsdev->pending.raw_data);
 327                 hsdev->pending.status = false;
 328         }
 329         mutex_unlock(&hsdev->mutex);
 330
 331         return ret_val;
 332 }
 333 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 334
 335 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
 336                                 u32 report_id, int field_index, u32 usage_id)
 337 {
 338         struct hid_report *report;
 339         struct hid_field *field;
 340         int i;
 341
 342         report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
 343         if (!report || (field_index >= report->maxfield))
 344                 goto done_proc;
 345
 346         field = report->field[field_index];
 347         for (i = 0; i < field->maxusage; ++i) {
 348                 if (field->usage[i].hid == usage_id)
 349                         return field->usage[i].usage_index;
 350         }
 351
 352 done_proc:
 353         return -EINVAL;
 354 }
 355 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
 356
 357 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
 358                                 u8 type,
 359                                 u32 usage_id,
 360                                 u32 attr_usage_id,
 361                                 struct hid_sensor_hub_attribute_info *info)
 362 {
 363         int ret = -1;
 364         int i;
 365         struct hid_report *report;
 366         struct hid_field *field;
 367         struct hid_report_enum *report_enum;
 368         struct hid_device *hdev = hsdev->hdev;
 369
 370         /* Initialize with defaults */
 371         info->usage_id = usage_id;
 372         info->attrib_id = attr_usage_id;
 373         info->report_id = -1;
 374         info->index = -1;
 375         info->units = -1;
 376         info->unit_expo = -1;
 377
 378         report_enum = &hdev->report_enum[type];
 379         list_for_each_entry(report, &report_enum->report_list, list) {
 380                 for (i = 0; i < report->maxfield; ++i) {
 381                         field = report->field[i];
 382                         if (field->maxusage) {
 383                                 if (field->physical == usage_id &&
 384                                         (field->logical == attr_usage_id ||
 385                                         field->usage[0].hid ==
 386                                                         attr_usage_id) &&
 387                                         (field->usage[0].collection_index >=
 388                                         hsdev->start_collection_index) &&
 389                                         (field->usage[0].collection_index <
 390                                         hsdev->end_collection_index)) {
 391
 392                                         sensor_hub_fill_attr_info(info, i,
 393                                                                 report->id,
 394                                                                 field);
 395                                         ret = 0;
 396                                         break;
 397                                 }
 398                         }
 399                 }
 400
 401         }
 402
 403         return ret;
 404 }
 405 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 406
 407 #ifdef CONFIG_PM
 408 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
 409 {
 410         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 411         struct hid_sensor_hub_callbacks_list *callback;
 412         unsigned long flags;
 413
 414         hid_dbg(hdev, " sensor_hub_suspend\n");
 415         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 416         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 417                 if (callback->usage_callback->suspend)
 418                         callback->usage_callback->suspend(
 419                                         callback->hsdev, callback->priv);
 420         }
 421         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 422
 423         return 0;
 424 }
 425
 426 static int sensor_hub_resume(struct hid_device *hdev)
 427 {
 428         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 429         struct hid_sensor_hub_callbacks_list *callback;
 430         unsigned long flags;
 431
 432         hid_dbg(hdev, " sensor_hub_resume\n");
 433         spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
 434         list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
 435                 if (callback->usage_callback->resume)
 436                         callback->usage_callback->resume(
 437                                         callback->hsdev, callback->priv);
 438         }
 439         spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
 440
 441         return 0;
 442 }
 443
 444 static int sensor_hub_reset_resume(struct hid_device *hdev)
 445 {
 446         return 0;
 447 }
 448 #endif
 449
 450 /*
 451  * Handle raw report as sent by device
 452  */
 453 static int sensor_hub_raw_event(struct hid_device *hdev,
 454                 struct hid_report *report, u8 *raw_data, int size)
 455 {
 456         int i;
 457         u8 *ptr;
 458         int sz;
 459         struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
 460         unsigned long flags;
 461         struct hid_sensor_hub_callbacks *callback = NULL;
 462         struct hid_collection *collection = NULL;
 463         void *priv = NULL;
 464         struct hid_sensor_hub_device *hsdev = NULL;
 465
 466         hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
 467                          report->id, size, report->type);
 468         hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
 469         if (report->type != HID_INPUT_REPORT)
 470                 return 1;
 471
 472         ptr = raw_data;
 473         ptr++; /* Skip report id */
 474
 475         spin_lock_irqsave(&pdata->lock, flags);
 476
 477         for (i = 0; i < report->maxfield; ++i) {
 478                 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
 479                                 i, report->field[i]->usage->collection_index,
 480                                 report->field[i]->usage->hid,
 481                                 (report->field[i]->report_size *
 482                                         report->field[i]->report_count)/8);
 483                 sz = (report->field[i]->report_size *
 484                                         report->field[i]->report_count)/8;
 485                 collection = &hdev->collection[
 486                                 report->field[i]->usage->collection_index];
 487                 hid_dbg(hdev, "collection->usage %x\n",
 488                                         collection->usage);
 489
 490                 callback = sensor_hub_get_callback(hdev,
 491                                 report->field[i]->physical,
 492                                 report->field[i]->usage[0].collection_index,
 493                                 &hsdev, &priv);
 494                 if (!callback) {
 495                         ptr += sz;
 496                         continue;
 497                 }
 498                 if (hsdev->pending.status && hsdev->pending.attr_usage_id ==
 499                                 report->field[i]->usage->hid) {
 500                         hid_dbg(hdev, "data was pending ...\n");
 501                         hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
 502                         if (hsdev->pending.raw_data)
 503                                 hsdev->pending.raw_size = sz;
 504                         else
 505                                 hsdev->pending.raw_size = 0;
 506                         complete(&hsdev->pending.ready);
 507                 }
 508                 if (callback->capture_sample) {
 509                         if (report->field[i]->logical)
 510                                 callback->capture_sample(hsdev,
 511                                         report->field[i]->logical, sz, ptr,
 512                                         callback->pdev);
 513                         else
 514                                 callback->capture_sample(hsdev,
 515                                         report->field[i]->usage->hid, sz, ptr,
 516                                         callback->pdev);
 517                 }
 518                 ptr += sz;
 519         }
 520         if (callback && collection && callback->send_event)
 521                 callback->send_event(hsdev, collection->usage,
 522                                 callback->pdev);
 523         spin_unlock_irqrestore(&pdata->lock, flags);
 524
 525         return 1;
 526 }
 527
 528 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
 529 {
 530         int ret = 0;
 531         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 532
 533         mutex_lock(&data->mutex);
 534         if (!data->ref_cnt) {
 535                 ret = hid_hw_open(hsdev->hdev);
 536                 if (ret) {
 537                         hid_err(hsdev->hdev, "failed to open hid device\n");
 538                         mutex_unlock(&data->mutex);
 539                         return ret;
 540                 }
 541         }
 542         data->ref_cnt++;
 543         mutex_unlock(&data->mutex);
 544
 545         return ret;
 546 }
 547 EXPORT_SYMBOL_GPL(sensor_hub_device_open);
 548
 549 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
 550 {
 551         struct sensor_hub_data *data =  hid_get_drvdata(hsdev->hdev);
 552
 553         mutex_lock(&data->mutex);
 554         data->ref_cnt--;
 555         if (!data->ref_cnt)
 556                 hid_hw_close(hsdev->hdev);
 557         mutex_unlock(&data->mutex);
 558 }
 559 EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 560
 561 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 562                 unsigned int *rsize)
 563 {
 564         int index;
 565         struct sensor_hub_data *sd =  hid_get_drvdata(hdev);
 566         unsigned char report_block[] = {
 567                                 0x0a,  0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
 568         unsigned char power_block[] = {
 569                                 0x0a,  0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
 570
 571         if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
 572                 hid_dbg(hdev, "No Enum quirks\n");
 573                 return rdesc;
 574         }
 575
 576         /* Looks for power and report state usage id and force to 1 */
 577         for (index = 0; index < *rsize; ++index) {
 578                 if (((*rsize - index) > sizeof(report_block)) &&
 579                         !memcmp(&rdesc[index], report_block,
 580                                                 sizeof(report_block))) {
 581                         rdesc[index + 4] = 0x01;
 582                         index += sizeof(report_block);
 583                 }
 584                 if (((*rsize - index) > sizeof(power_block)) &&
 585                         !memcmp(&rdesc[index], power_block,
 586                                                 sizeof(power_block))) {
 587                         rdesc[index + 4] = 0x01;
 588                         index += sizeof(power_block);
 589                 }
 590         }
 591
 592         return rdesc;
 593 }
 594
 595 static int sensor_hub_probe(struct hid_device *hdev,
 596                                 const struct hid_device_id *id)
 597 {
 598         int ret;
 599         struct sensor_hub_data *sd;
 600         int i;
 601         char *name;
 602         int dev_cnt;
 603         struct hid_sensor_hub_device *hsdev;
 604         struct hid_sensor_hub_device *last_hsdev = NULL;
 605         struct hid_sensor_hub_device *collection_hsdev = NULL;
 606
 607         sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
 608         if (!sd) {
 609                 hid_err(hdev, "cannot allocate Sensor data\n");
 610                 return -ENOMEM;
 611         }
 612
 613         hid_set_drvdata(hdev, sd);
 614         sd->quirks = id->driver_data;
 615
 616         spin_lock_init(&sd->lock);
 617         spin_lock_init(&sd->dyn_callback_lock);
 618         mutex_init(&sd->mutex);
 619         ret = hid_parse(hdev);
 620         if (ret) {
 621                 hid_err(hdev, "parse failed\n");
 622                 return ret;
 623         }
 624         INIT_LIST_HEAD(&hdev->inputs);
 625
 626         ret = hid_hw_start(hdev, 0);
 627         if (ret) {
 628                 hid_err(hdev, "hw start failed\n");
 629                 return ret;
 630         }
 631         INIT_LIST_HEAD(&sd->dyn_callback_list);
 632         sd->hid_sensor_client_cnt = 0;
 633
 634         dev_cnt = sensor_hub_get_physical_device_count(hdev);
 635         if (dev_cnt > HID_MAX_PHY_DEVICES) {
 636                 hid_err(hdev, "Invalid Physical device count\n");
 637                 ret = -EINVAL;
 638                 goto err_stop_hw;
 639         }
 640         sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt *
 641                                                       sizeof(struct mfd_cell),
 642                                                       GFP_KERNEL);
 643         if (sd->hid_sensor_hub_client_devs == NULL) {
 644                 hid_err(hdev, "Failed to allocate memory for mfd cells\n");
 645                         ret = -ENOMEM;
 646                         goto err_stop_hw;
 647         }
 648
 649         for (i = 0; i < hdev->maxcollection; ++i) {
 650                 struct hid_collection *collection = &hdev->collection[i];
 651
 652                 if (collection->type == HID_COLLECTION_PHYSICAL ||
 653                     collection->type == HID_COLLECTION_APPLICATION) {
 654
 655                         hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
 656                                              GFP_KERNEL);
 657                         if (!hsdev) {
 658                                 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
 659                                 ret = -ENOMEM;
 660                                 goto err_stop_hw;
 661                         }
 662                         hsdev->hdev = hdev;
 663                         hsdev->vendor_id = hdev->vendor;
 664                         hsdev->product_id = hdev->product;
 665                         hsdev->usage = collection->usage;
 666                         mutex_init(&hsdev->mutex);
 667                         hsdev->start_collection_index = i;
 668                         if (last_hsdev)
 669                                 last_hsdev->end_collection_index = i;
 670                         last_hsdev = hsdev;
 671                         name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
 672                                               "HID-SENSOR-%x",
 673                                               collection->usage);
 674                         if (name == NULL) {
 675                                 hid_err(hdev, "Failed MFD device name\n");
 676                                         ret = -ENOMEM;
 677                                         goto err_stop_hw;
 678                         }
 679                         sd->hid_sensor_hub_client_devs[
 680                                 sd->hid_sensor_client_cnt].name = name;
 681                         sd->hid_sensor_hub_client_devs[
 682                                 sd->hid_sensor_client_cnt].platform_data =
 683                                                         hsdev;
 684                         sd->hid_sensor_hub_client_devs[
 685                                 sd->hid_sensor_client_cnt].pdata_size =
 686                                                         sizeof(*hsdev);
 687                         hid_dbg(hdev, "Adding %s:%d\n", name,
 688                                         hsdev->start_collection_index);
 689                         sd->hid_sensor_client_cnt++;
 690                         if (collection_hsdev)
 691                                 collection_hsdev->end_collection_index = i;
 692                         if (collection->type == HID_COLLECTION_APPLICATION &&
 693                             collection->usage == HID_USAGE_SENSOR_COLLECTION)
 694                                 collection_hsdev = hsdev;
 695                 }
 696         }
 697         if (last_hsdev)
 698                 last_hsdev->end_collection_index = i;
 699         if (collection_hsdev)
 700                 collection_hsdev->end_collection_index = i;
 701
 702         ret = mfd_add_hotplug_devices(&hdev->dev,
 703                         sd->hid_sensor_hub_client_devs,
 704                         sd->hid_sensor_client_cnt);
 705         if (ret < 0)
 706                 goto err_stop_hw;
 707
 708         return ret;
 709
 710 err_stop_hw:
 711         hid_hw_stop(hdev);
 712
 713         return ret;
 714 }
 715
 716 static void sensor_hub_remove(struct hid_device *hdev)
 717 {
 718         struct sensor_hub_data *data = hid_get_drvdata(hdev);
 719         unsigned long flags;
 720         int i;
 721
 722         hid_dbg(hdev, " hardware removed\n");
 723         hid_hw_close(hdev);
 724         hid_hw_stop(hdev);
 725         spin_lock_irqsave(&data->lock, flags);
 726         for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
 727                 struct hid_sensor_hub_device *hsdev =
 728                         data->hid_sensor_hub_client_devs[i].platform_data;
 729                 if (hsdev->pending.status)
 730                         complete(&hsdev->pending.ready);
 731         }
 732         spin_unlock_irqrestore(&data->lock, flags);
 733         mfd_remove_devices(&hdev->dev);
 734         hid_set_drvdata(hdev, NULL);
 735         mutex_destroy(&data->mutex);
 736 }
 737
 738 static const struct hid_device_id sensor_hub_devices[] = {
 739         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
 740                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
 741                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 742         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
 743                         USB_DEVICE_ID_INTEL_HID_SENSOR_0),
 744                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 745         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
 746                         USB_DEVICE_ID_INTEL_HID_SENSOR_1),
 747                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 748         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
 749                         USB_DEVICE_ID_MS_SURFACE_PRO_2),
 750                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 751         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
 752                         USB_DEVICE_ID_MS_TOUCH_COVER_2),
 753                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 754         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT,
 755                         USB_DEVICE_ID_MS_TYPE_COVER_2),
 756                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 757         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
 758                         USB_DEVICE_ID_STM_HID_SENSOR),
 759                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 760         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0,
 761                         USB_DEVICE_ID_STM_HID_SENSOR_1),
 762                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 763         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS,
 764                         USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA),
 765                         .driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
 766         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
 767                      HID_ANY_ID) },
 768         { }
 769 };
 770 MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 771
 772 static struct hid_driver sensor_hub_driver = {
 773         .name = "hid-sensor-hub",
 774         .id_table = sensor_hub_devices,
 775         .probe = sensor_hub_probe,
 776         .remove = sensor_hub_remove,
 777         .raw_event = sensor_hub_raw_event,
 778         .report_fixup = sensor_hub_report_fixup,
 779 #ifdef CONFIG_PM
 780         .suspend = sensor_hub_suspend,
 781         .resume = sensor_hub_resume,
 782         .reset_resume = sensor_hub_reset_resume,
 783 #endif
 784 };
 785 module_hid_driver(sensor_hub_driver);
 786
 787 MODULE_DESCRIPTION("HID Sensor Hub driver");
 788 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 789 MODULE_LICENSE("GPL");