1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * HID Sensors Driver 4 * Copyright (c) 2012, Intel Corporation. 5 */ 6 7#include <linux/device.h> 8#include <linux/hid.h> 9#include <linux/module.h> 10#include <linux/slab.h> 11#include <linux/mfd/core.h> 12#include <linux/list.h> 13#include <linux/hid-sensor-ids.h> 14#include <linux/hid-sensor-hub.h> 15#include "hid-ids.h" 16 17#define HID_SENSOR_HUB_ENUM_QUIRK 0x01 18 19/** 20 * struct sensor_hub_data - Hold a instance data for a HID hub device 21 * @hsdev: Stored hid instance for current hub device. 22 * @mutex: Mutex to serialize synchronous request. 23 * @lock: Spin lock to protect pending request structure. 24 * @dyn_callback_list: Holds callback function 25 * @dyn_callback_lock: spin lock to protect callback list 26 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. 27 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). 28 * @ref_cnt: Number of MFD clients have opened this device 29 */ 30struct sensor_hub_data { 31 struct mutex mutex; 32 spinlock_t lock; 33 struct list_head dyn_callback_list; 34 spinlock_t dyn_callback_lock; 35 struct mfd_cell *hid_sensor_hub_client_devs; 36 int hid_sensor_client_cnt; 37 unsigned long quirks; 38 int ref_cnt; 39}; 40 41/** 42 * struct hid_sensor_hub_callbacks_list - Stores callback list 43 * @list: list head. 44 * @usage_id: usage id for a physical device. 45 * @usage_callback: Stores registered callback functions. 46 * @priv: Private data for a physical device. 47 */ 48struct hid_sensor_hub_callbacks_list { 49 struct list_head list; 50 u32 usage_id; 51 struct hid_sensor_hub_device *hsdev; 52 struct hid_sensor_hub_callbacks *usage_callback; 53 void *priv; 54}; 55 56static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, 57 int dir) 58{ 59 struct hid_report *report; 60 61 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { 62 if (report->id == id) 63 return report; 64 } 65 hid_warn(hdev, "No report with id 0x%x found\n", id); 66 67 return NULL; 68} 69 70static int sensor_hub_get_physical_device_count(struct hid_device *hdev) 71{ 72 int i; 73 int count = 0; 74 75 for (i = 0; i < hdev->maxcollection; ++i) { 76 struct hid_collection *collection = &hdev->collection[i]; 77 if (collection->type == HID_COLLECTION_PHYSICAL || 78 collection->type == HID_COLLECTION_APPLICATION) 79 ++count; 80 } 81 82 return count; 83} 84 85static void sensor_hub_fill_attr_info( 86 struct hid_sensor_hub_attribute_info *info, 87 s32 index, s32 report_id, struct hid_field *field) 88{ 89 info->index = index; 90 info->report_id = report_id; 91 info->units = field->unit; 92 info->unit_expo = field->unit_exponent; 93 info->size = (field->report_size * field->report_count)/8; 94 info->logical_minimum = field->logical_minimum; 95 info->logical_maximum = field->logical_maximum; 96} 97 98static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( 99 struct hid_device *hdev, 100 u32 usage_id, 101 int collection_index, 102 struct hid_sensor_hub_device **hsdev, 103 void **priv) 104{ 105 struct hid_sensor_hub_callbacks_list *callback; 106 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 107 unsigned long flags; 108 109 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 110 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 111 if ((callback->usage_id == usage_id || 112 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && 113 (collection_index >= 114 callback->hsdev->start_collection_index) && 115 (collection_index < 116 callback->hsdev->end_collection_index)) { 117 *priv = callback->priv; 118 *hsdev = callback->hsdev; 119 spin_unlock_irqrestore(&pdata->dyn_callback_lock, 120 flags); 121 return callback->usage_callback; 122 } 123 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 124 125 return NULL; 126} 127 128int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, 129 u32 usage_id, 130 struct hid_sensor_hub_callbacks *usage_callback) 131{ 132 struct hid_sensor_hub_callbacks_list *callback; 133 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 134 unsigned long flags; 135 136 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 137 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 138 if (callback->usage_id == usage_id && 139 callback->hsdev == hsdev) { 140 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 141 return -EINVAL; 142 } 143 callback = kzalloc(sizeof(*callback), GFP_ATOMIC); 144 if (!callback) { 145 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 146 return -ENOMEM; 147 } 148 callback->hsdev = hsdev; 149 callback->usage_callback = usage_callback; 150 callback->usage_id = usage_id; 151 callback->priv = NULL; 152 /* 153 * If there is a handler registered for the collection type, then 154 * it will handle all reports for sensors in this collection. If 155 * there is also an individual sensor handler registration, then 156 * we want to make sure that the reports are directed to collection 157 * handler, as this may be a fusion sensor. So add collection handlers 158 * to the beginning of the list, so that they are matched first. 159 */ 160 if (usage_id == HID_USAGE_SENSOR_COLLECTION) 161 list_add(&callback->list, &pdata->dyn_callback_list); 162 else 163 list_add_tail(&callback->list, &pdata->dyn_callback_list); 164 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 165 166 return 0; 167} 168EXPORT_SYMBOL_GPL(sensor_hub_register_callback); 169 170int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, 171 u32 usage_id) 172{ 173 struct hid_sensor_hub_callbacks_list *callback; 174 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 175 unsigned long flags; 176 177 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 178 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 179 if (callback->usage_id == usage_id && 180 callback->hsdev == hsdev) { 181 list_del(&callback->list); 182 kfree(callback); 183 break; 184 } 185 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 186 187 return 0; 188} 189EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); 190 191int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 192 u32 field_index, int buffer_size, void *buffer) 193{ 194 struct hid_report *report; 195 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 196 __s32 *buf32 = buffer; 197 int i = 0; 198 int remaining_bytes; 199 __s32 value; 200 int ret = 0; 201 202 mutex_lock(&data->mutex); 203 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 204 if (!report || (field_index >= report->maxfield)) { 205 ret = -EINVAL; 206 goto done_proc; 207 } 208 209 remaining_bytes = buffer_size % sizeof(__s32); 210 buffer_size = buffer_size / sizeof(__s32); 211 if (buffer_size) { 212 for (i = 0; i < buffer_size; ++i) { 213 ret = hid_set_field(report->field[field_index], i, 214 (__force __s32)cpu_to_le32(*buf32)); 215 if (ret) 216 goto done_proc; 217 218 ++buf32; 219 } 220 } 221 if (remaining_bytes) { 222 value = 0; 223 memcpy(&value, (u8 *)buf32, remaining_bytes); 224 ret = hid_set_field(report->field[field_index], i, 225 (__force __s32)cpu_to_le32(value)); 226 if (ret) 227 goto done_proc; 228 } 229 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); 230 hid_hw_wait(hsdev->hdev); 231 232done_proc: 233 mutex_unlock(&data->mutex); 234 235 return ret; 236} 237EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 238 239int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 240 u32 field_index, int buffer_size, void *buffer) 241{ 242 struct hid_report *report; 243 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 244 int report_size; 245 int ret = 0; 246 u8 *val_ptr; 247 int buffer_index = 0; 248 int i; 249 250 memset(buffer, 0, buffer_size); 251 252 mutex_lock(&data->mutex); 253 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 254 if (!report || (field_index >= report->maxfield) || 255 report->field[field_index]->report_count < 1) { 256 ret = -EINVAL; 257 goto done_proc; 258 } 259 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 260 hid_hw_wait(hsdev->hdev); 261 262 /* calculate number of bytes required to read this field */ 263 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 264 8) * 265 report->field[field_index]->report_count; 266 if (!report_size) { 267 ret = -EINVAL; 268 goto done_proc; 269 } 270 ret = min(report_size, buffer_size); 271 272 val_ptr = (u8 *)report->field[field_index]->value; 273 for (i = 0; i < report->field[field_index]->report_count; ++i) { 274 if (buffer_index >= ret) 275 break; 276 277 memcpy(&((u8 *)buffer)[buffer_index], val_ptr, 278 report->field[field_index]->report_size / 8); 279 val_ptr += sizeof(__s32); 280 buffer_index += (report->field[field_index]->report_size / 8); 281 } 282 283done_proc: 284 mutex_unlock(&data->mutex); 285 286 return ret; 287} 288EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 289 290 291int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 292 u32 usage_id, 293 u32 attr_usage_id, u32 report_id, 294 enum sensor_hub_read_flags flag, 295 bool is_signed) 296{ 297 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 298 unsigned long flags; 299 struct hid_report *report; 300 int ret_val = 0; 301 302 report = sensor_hub_report(report_id, hsdev->hdev, 303 HID_INPUT_REPORT); 304 if (!report) 305 return -EINVAL; 306 307 mutex_lock(hsdev->mutex_ptr); 308 if (flag == SENSOR_HUB_SYNC) { 309 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 310 init_completion(&hsdev->pending.ready); 311 hsdev->pending.usage_id = usage_id; 312 hsdev->pending.attr_usage_id = attr_usage_id; 313 hsdev->pending.raw_size = 0; 314 315 spin_lock_irqsave(&data->lock, flags); 316 hsdev->pending.status = true; 317 spin_unlock_irqrestore(&data->lock, flags); 318 } 319 mutex_lock(&data->mutex); 320 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 321 mutex_unlock(&data->mutex); 322 if (flag == SENSOR_HUB_SYNC) { 323 wait_for_completion_interruptible_timeout( 324 &hsdev->pending.ready, HZ*5); 325 switch (hsdev->pending.raw_size) { 326 case 1: 327 if (is_signed) 328 ret_val = *(s8 *)hsdev->pending.raw_data; 329 else 330 ret_val = *(u8 *)hsdev->pending.raw_data; 331 break; 332 case 2: 333 if (is_signed) 334 ret_val = *(s16 *)hsdev->pending.raw_data; 335 else 336 ret_val = *(u16 *)hsdev->pending.raw_data; 337 break; 338 case 4: 339 ret_val = *(u32 *)hsdev->pending.raw_data; 340 break; 341 default: 342 ret_val = 0; 343 } 344 kfree(hsdev->pending.raw_data); 345 hsdev->pending.status = false; 346 } 347 mutex_unlock(hsdev->mutex_ptr); 348 349 return ret_val; 350} 351EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 352 353int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 354 u32 report_id, int field_index, u32 usage_id) 355{ 356 struct hid_report *report; 357 struct hid_field *field; 358 int i; 359 360 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 361 if (!report || (field_index >= report->maxfield)) 362 goto done_proc; 363 364 field = report->field[field_index]; 365 for (i = 0; i < field->maxusage; ++i) { 366 if (field->usage[i].hid == usage_id) 367 return field->usage[i].usage_index; 368 } 369 370done_proc: 371 return -EINVAL; 372} 373EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 374 375int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 376 u8 type, 377 u32 usage_id, 378 u32 attr_usage_id, 379 struct hid_sensor_hub_attribute_info *info) 380{ 381 int ret = -1; 382 int i; 383 struct hid_report *report; 384 struct hid_field *field; 385 struct hid_report_enum *report_enum; 386 struct hid_device *hdev = hsdev->hdev; 387 388 /* Initialize with defaults */ 389 info->usage_id = usage_id; 390 info->attrib_id = attr_usage_id; 391 info->report_id = -1; 392 info->index = -1; 393 info->units = -1; 394 info->unit_expo = -1; 395 396 report_enum = &hdev->report_enum[type]; 397 list_for_each_entry(report, &report_enum->report_list, list) { 398 for (i = 0; i < report->maxfield; ++i) { 399 field = report->field[i]; 400 if (field->maxusage) { 401 if (field->physical == usage_id && 402 (field->logical == attr_usage_id || 403 field->usage[0].hid == 404 attr_usage_id) && 405 (field->usage[0].collection_index >= 406 hsdev->start_collection_index) && 407 (field->usage[0].collection_index < 408 hsdev->end_collection_index)) { 409 410 sensor_hub_fill_attr_info(info, i, 411 report->id, 412 field); 413 ret = 0; 414 break; 415 } 416 } 417 } 418 419 } 420 421 return ret; 422} 423EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 424 425#ifdef CONFIG_PM 426static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 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_suspend\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->suspend) 436 callback->usage_callback->suspend( 437 callback->hsdev, callback->priv); 438 } 439 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 440 441 return 0; 442} 443 444static int sensor_hub_resume(struct hid_device *hdev) 445{ 446 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 447 struct hid_sensor_hub_callbacks_list *callback; 448 unsigned long flags; 449 450 hid_dbg(hdev, " sensor_hub_resume\n"); 451 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 452 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 453 if (callback->usage_callback->resume) 454 callback->usage_callback->resume( 455 callback->hsdev, callback->priv); 456 } 457 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 458 459 return 0; 460} 461 462static int sensor_hub_reset_resume(struct hid_device *hdev) 463{ 464 return 0; 465} 466#endif 467 468/* 469 * Handle raw report as sent by device 470 */ 471static int sensor_hub_raw_event(struct hid_device *hdev, 472 struct hid_report *report, u8 *raw_data, int size) 473{ 474 int i; 475 u8 *ptr; 476 int sz; 477 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 478 unsigned long flags; 479 struct hid_sensor_hub_callbacks *callback = NULL; 480 struct hid_collection *collection = NULL; 481 void *priv = NULL; 482 struct hid_sensor_hub_device *hsdev = NULL; 483 484 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 485 report->id, size, report->type); 486 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 487 if (report->type != HID_INPUT_REPORT) 488 return 1; 489 490 ptr = raw_data; 491 if (report->id) 492 ptr++; /* Skip report id */ 493 494 spin_lock_irqsave(&pdata->lock, flags); 495 496 for (i = 0; i < report->maxfield; ++i) { 497 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 498 i, report->field[i]->usage->collection_index, 499 report->field[i]->usage->hid, 500 (report->field[i]->report_size * 501 report->field[i]->report_count)/8); 502 sz = (report->field[i]->report_size * 503 report->field[i]->report_count)/8; 504 collection = &hdev->collection[ 505 report->field[i]->usage->collection_index]; 506 hid_dbg(hdev, "collection->usage %x\n", 507 collection->usage); 508 509 callback = sensor_hub_get_callback(hdev, 510 report->field[i]->physical, 511 report->field[i]->usage[0].collection_index, 512 &hsdev, &priv); 513 if (!callback) { 514 ptr += sz; 515 continue; 516 } 517 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 518 report->field[i]->usage->hid || 519 hsdev->pending.attr_usage_id == 520 report->field[i]->logical)) { 521 hid_dbg(hdev, "data was pending ...\n"); 522 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 523 if (hsdev->pending.raw_data) 524 hsdev->pending.raw_size = sz; 525 else 526 hsdev->pending.raw_size = 0; 527 complete(&hsdev->pending.ready); 528 } 529 if (callback->capture_sample) { 530 if (report->field[i]->logical) 531 callback->capture_sample(hsdev, 532 report->field[i]->logical, sz, ptr, 533 callback->pdev); 534 else 535 callback->capture_sample(hsdev, 536 report->field[i]->usage->hid, sz, ptr, 537 callback->pdev); 538 } 539 ptr += sz; 540 } 541 if (callback && collection && callback->send_event) 542 callback->send_event(hsdev, collection->usage, 543 callback->pdev); 544 spin_unlock_irqrestore(&pdata->lock, flags); 545 546 return 1; 547} 548 549int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 550{ 551 int ret = 0; 552 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 553 554 mutex_lock(&data->mutex); 555 if (!data->ref_cnt) { 556 ret = hid_hw_open(hsdev->hdev); 557 if (ret) { 558 hid_err(hsdev->hdev, "failed to open hid device\n"); 559 mutex_unlock(&data->mutex); 560 return ret; 561 } 562 } 563 data->ref_cnt++; 564 mutex_unlock(&data->mutex); 565 566 return ret; 567} 568EXPORT_SYMBOL_GPL(sensor_hub_device_open); 569 570void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 571{ 572 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 573 574 mutex_lock(&data->mutex); 575 data->ref_cnt--; 576 if (!data->ref_cnt) 577 hid_hw_close(hsdev->hdev); 578 mutex_unlock(&data->mutex); 579} 580EXPORT_SYMBOL_GPL(sensor_hub_device_close); 581 582static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 583 unsigned int *rsize) 584{ 585 /* 586 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 587 * minimum for magnetic flux axis greater than the maximum. 588 */ 589 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 590 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 591 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 592 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 593 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 594 /* Sets negative logical minimum for mag x, y and z */ 595 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 596 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 597 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 598 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 599 } 600 601 return rdesc; 602} 603 604static int sensor_hub_probe(struct hid_device *hdev, 605 const struct hid_device_id *id) 606{ 607 int ret; 608 struct sensor_hub_data *sd; 609 int i; 610 char *name; 611 int dev_cnt; 612 struct hid_sensor_hub_device *hsdev; 613 struct hid_sensor_hub_device *last_hsdev = NULL; 614 struct hid_sensor_hub_device *collection_hsdev = NULL; 615 616 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 617 if (!sd) { 618 hid_err(hdev, "cannot allocate Sensor data\n"); 619 return -ENOMEM; 620 } 621 622 hid_set_drvdata(hdev, sd); 623 sd->quirks = id->driver_data; 624 625 spin_lock_init(&sd->lock); 626 spin_lock_init(&sd->dyn_callback_lock); 627 mutex_init(&sd->mutex); 628 ret = hid_parse(hdev); 629 if (ret) { 630 hid_err(hdev, "parse failed\n"); 631 return ret; 632 } 633 INIT_LIST_HEAD(&hdev->inputs); 634 635 ret = hid_hw_start(hdev, 0); 636 if (ret) { 637 hid_err(hdev, "hw start failed\n"); 638 return ret; 639 } 640 INIT_LIST_HEAD(&sd->dyn_callback_list); 641 sd->hid_sensor_client_cnt = 0; 642 643 dev_cnt = sensor_hub_get_physical_device_count(hdev); 644 if (dev_cnt > HID_MAX_PHY_DEVICES) { 645 hid_err(hdev, "Invalid Physical device count\n"); 646 ret = -EINVAL; 647 goto err_stop_hw; 648 } 649 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 650 dev_cnt, 651 sizeof(struct mfd_cell), 652 GFP_KERNEL); 653 if (sd->hid_sensor_hub_client_devs == NULL) { 654 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 655 ret = -ENOMEM; 656 goto err_stop_hw; 657 } 658 659 for (i = 0; i < hdev->maxcollection; ++i) { 660 struct hid_collection *collection = &hdev->collection[i]; 661 662 if (collection->type == HID_COLLECTION_PHYSICAL || 663 collection->type == HID_COLLECTION_APPLICATION) { 664 665 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 666 GFP_KERNEL); 667 if (!hsdev) { 668 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 669 ret = -ENOMEM; 670 goto err_stop_hw; 671 } 672 hsdev->hdev = hdev; 673 hsdev->vendor_id = hdev->vendor; 674 hsdev->product_id = hdev->product; 675 hsdev->usage = collection->usage; 676 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 677 sizeof(struct mutex), 678 GFP_KERNEL); 679 if (!hsdev->mutex_ptr) { 680 ret = -ENOMEM; 681 goto err_stop_hw; 682 } 683 mutex_init(hsdev->mutex_ptr); 684 hsdev->start_collection_index = i; 685 if (last_hsdev) 686 last_hsdev->end_collection_index = i; 687 last_hsdev = hsdev; 688 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 689 "HID-SENSOR-%x", 690 collection->usage); 691 if (name == NULL) { 692 hid_err(hdev, "Failed MFD device name\n"); 693 ret = -ENOMEM; 694 goto err_stop_hw; 695 } 696 sd->hid_sensor_hub_client_devs[ 697 sd->hid_sensor_client_cnt].name = name; 698 sd->hid_sensor_hub_client_devs[ 699 sd->hid_sensor_client_cnt].platform_data = 700 hsdev; 701 sd->hid_sensor_hub_client_devs[ 702 sd->hid_sensor_client_cnt].pdata_size = 703 sizeof(*hsdev); 704 hid_dbg(hdev, "Adding %s:%d\n", name, 705 hsdev->start_collection_index); 706 sd->hid_sensor_client_cnt++; 707 if (collection_hsdev) 708 collection_hsdev->end_collection_index = i; 709 if (collection->type == HID_COLLECTION_APPLICATION && 710 collection->usage == HID_USAGE_SENSOR_COLLECTION) 711 collection_hsdev = hsdev; 712 } 713 } 714 if (last_hsdev) 715 last_hsdev->end_collection_index = i; 716 if (collection_hsdev) 717 collection_hsdev->end_collection_index = i; 718 719 ret = mfd_add_hotplug_devices(&hdev->dev, 720 sd->hid_sensor_hub_client_devs, 721 sd->hid_sensor_client_cnt); 722 if (ret < 0) 723 goto err_stop_hw; 724 725 return ret; 726 727err_stop_hw: 728 hid_hw_stop(hdev); 729 730 return ret; 731} 732 733static void sensor_hub_remove(struct hid_device *hdev) 734{ 735 struct sensor_hub_data *data = hid_get_drvdata(hdev); 736 unsigned long flags; 737 int i; 738 739 hid_dbg(hdev, " hardware removed\n"); 740 hid_hw_close(hdev); 741 hid_hw_stop(hdev); 742 spin_lock_irqsave(&data->lock, flags); 743 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 744 struct hid_sensor_hub_device *hsdev = 745 data->hid_sensor_hub_client_devs[i].platform_data; 746 if (hsdev->pending.status) 747 complete(&hsdev->pending.ready); 748 } 749 spin_unlock_irqrestore(&data->lock, flags); 750 mfd_remove_devices(&hdev->dev); 751 mutex_destroy(&data->mutex); 752} 753 754static const struct hid_device_id sensor_hub_devices[] = { 755 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 756 HID_ANY_ID) }, 757 { } 758}; 759MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 760 761static struct hid_driver sensor_hub_driver = { 762 .name = "hid-sensor-hub", 763 .id_table = sensor_hub_devices, 764 .probe = sensor_hub_probe, 765 .remove = sensor_hub_remove, 766 .raw_event = sensor_hub_raw_event, 767 .report_fixup = sensor_hub_report_fixup, 768#ifdef CONFIG_PM 769 .suspend = sensor_hub_suspend, 770 .resume = sensor_hub_resume, 771 .reset_resume = sensor_hub_reset_resume, 772#endif 773}; 774module_hid_driver(sensor_hub_driver); 775 776MODULE_DESCRIPTION("HID Sensor Hub driver"); 777MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 778MODULE_LICENSE("GPL"); 779