linux/drivers/hid/hid-sensor-hub.c
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   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 */
  40struct 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 */
  61struct 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 */
  80struct 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
  88static 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
 102static 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
 116static 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
 129static 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
 156int 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}
 185EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
 186
 187int 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}
 206EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
 207
 208int 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
 225done_proc:
 226        mutex_unlock(&data->mutex);
 227
 228        return ret;
 229}
 230EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
 231
 232int 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
 250done_proc:
 251        mutex_unlock(&data->mutex);
 252
 253        return ret;
 254}
 255EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
 256
 257
 258int 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
 298err_free:
 299        data->pending.status = false;
 300        mutex_unlock(&data->mutex);
 301
 302        return ret_val;
 303}
 304EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
 305
 306int 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
 323done_proc:
 324        return -EINVAL;
 325}
 326EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
 327
 328int 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}
 376EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
 377
 378#ifdef CONFIG_PM
 379static 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
 397static 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
 415static 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 */
 424static 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
 496int 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}
 515EXPORT_SYMBOL_GPL(sensor_hub_device_open);
 516
 517void 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}
 527EXPORT_SYMBOL_GPL(sensor_hub_device_close);
 528
 529static __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
 563static 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
 667err_stop_hw:
 668        hid_hw_stop(hdev);
 669
 670        return ret;
 671}
 672
 673static 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
 690static 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};
 722MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
 723
 724static 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};
 737module_hid_driver(sensor_hub_driver);
 738
 739MODULE_DESCRIPTION("HID Sensor Hub driver");
 740MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
 741MODULE_LICENSE("GPL");
 742
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