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 * @mutex: Mutex to serialize synchronous request. 22 * @lock: Spin lock to protect pending request structure. 23 * @dyn_callback_list: Holds callback function 24 * @dyn_callback_lock: spin lock to protect callback list 25 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. 26 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). 27 * @ref_cnt: Number of MFD clients have opened this device 28 */ 29struct sensor_hub_data { 30 struct mutex mutex; 31 spinlock_t lock; 32 struct list_head dyn_callback_list; 33 spinlock_t dyn_callback_lock; 34 struct mfd_cell *hid_sensor_hub_client_devs; 35 int hid_sensor_client_cnt; 36 int ref_cnt; 37}; 38 39/** 40 * struct hid_sensor_hub_callbacks_list - Stores callback list 41 * @list: list head. 42 * @usage_id: usage id for a physical device. 43 * @hsdev: Stored hid instance for current hub device. 44 * @usage_callback: Stores registered callback functions. 45 * @priv: Private data for a physical device. 46 */ 47struct hid_sensor_hub_callbacks_list { 48 struct list_head list; 49 u32 usage_id; 50 struct hid_sensor_hub_device *hsdev; 51 struct hid_sensor_hub_callbacks *usage_callback; 52 void *priv; 53}; 54 55static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, 56 int dir) 57{ 58 struct hid_report *report; 59 60 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { 61 if (report->id == id) 62 return report; 63 } 64 hid_warn(hdev, "No report with id 0x%x found\n", id); 65 66 return NULL; 67} 68 69static int sensor_hub_get_physical_device_count(struct hid_device *hdev) 70{ 71 int i; 72 int count = 0; 73 74 for (i = 0; i < hdev->maxcollection; ++i) { 75 struct hid_collection *collection = &hdev->collection[i]; 76 if (collection->type == HID_COLLECTION_PHYSICAL || 77 collection->type == HID_COLLECTION_APPLICATION) 78 ++count; 79 } 80 81 return count; 82} 83 84static void sensor_hub_fill_attr_info( 85 struct hid_sensor_hub_attribute_info *info, 86 s32 index, s32 report_id, struct hid_field *field) 87{ 88 info->index = index; 89 info->report_id = report_id; 90 info->units = field->unit; 91 info->unit_expo = field->unit_exponent; 92 info->size = (field->report_size * field->report_count)/8; 93 info->logical_minimum = field->logical_minimum; 94 info->logical_maximum = field->logical_maximum; 95} 96 97static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( 98 struct hid_device *hdev, 99 u32 usage_id, 100 int collection_index, 101 struct hid_sensor_hub_device **hsdev, 102 void **priv) 103{ 104 struct hid_sensor_hub_callbacks_list *callback; 105 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 106 unsigned long flags; 107 108 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 109 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 110 if ((callback->usage_id == usage_id || 111 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && 112 (collection_index >= 113 callback->hsdev->start_collection_index) && 114 (collection_index < 115 callback->hsdev->end_collection_index)) { 116 *priv = callback->priv; 117 *hsdev = callback->hsdev; 118 spin_unlock_irqrestore(&pdata->dyn_callback_lock, 119 flags); 120 return callback->usage_callback; 121 } 122 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 123 124 return NULL; 125} 126 127int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, 128 u32 usage_id, 129 struct hid_sensor_hub_callbacks *usage_callback) 130{ 131 struct hid_sensor_hub_callbacks_list *callback; 132 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 133 unsigned long flags; 134 135 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 136 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 137 if (callback->usage_id == usage_id && 138 callback->hsdev == hsdev) { 139 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 140 return -EINVAL; 141 } 142 callback = kzalloc(sizeof(*callback), GFP_ATOMIC); 143 if (!callback) { 144 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 145 return -ENOMEM; 146 } 147 callback->hsdev = hsdev; 148 callback->usage_callback = usage_callback; 149 callback->usage_id = usage_id; 150 callback->priv = NULL; 151 /* 152 * If there is a handler registered for the collection type, then 153 * it will handle all reports for sensors in this collection. If 154 * there is also an individual sensor handler registration, then 155 * we want to make sure that the reports are directed to collection 156 * handler, as this may be a fusion sensor. So add collection handlers 157 * to the beginning of the list, so that they are matched first. 158 */ 159 if (usage_id == HID_USAGE_SENSOR_COLLECTION) 160 list_add(&callback->list, &pdata->dyn_callback_list); 161 else 162 list_add_tail(&callback->list, &pdata->dyn_callback_list); 163 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 164 165 return 0; 166} 167EXPORT_SYMBOL_GPL(sensor_hub_register_callback); 168 169int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, 170 u32 usage_id) 171{ 172 struct hid_sensor_hub_callbacks_list *callback; 173 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 174 unsigned long flags; 175 176 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 177 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 178 if (callback->usage_id == usage_id && 179 callback->hsdev == hsdev) { 180 list_del(&callback->list); 181 kfree(callback); 182 break; 183 } 184 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 185 186 return 0; 187} 188EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); 189 190int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 191 u32 field_index, int buffer_size, void *buffer) 192{ 193 struct hid_report *report; 194 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 195 __s32 *buf32 = buffer; 196 int i = 0; 197 int remaining_bytes; 198 __s32 value; 199 int ret = 0; 200 201 mutex_lock(&data->mutex); 202 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 203 if (!report || (field_index >= report->maxfield)) { 204 ret = -EINVAL; 205 goto done_proc; 206 } 207 208 remaining_bytes = buffer_size % sizeof(__s32); 209 buffer_size = buffer_size / sizeof(__s32); 210 if (buffer_size) { 211 for (i = 0; i < buffer_size; ++i) { 212 ret = hid_set_field(report->field[field_index], i, 213 (__force __s32)cpu_to_le32(*buf32)); 214 if (ret) 215 goto done_proc; 216 217 ++buf32; 218 } 219 } 220 if (remaining_bytes) { 221 value = 0; 222 memcpy(&value, (u8 *)buf32, remaining_bytes); 223 ret = hid_set_field(report->field[field_index], i, 224 (__force __s32)cpu_to_le32(value)); 225 if (ret) 226 goto done_proc; 227 } 228 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); 229 hid_hw_wait(hsdev->hdev); 230 231done_proc: 232 mutex_unlock(&data->mutex); 233 234 return ret; 235} 236EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 237 238int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 239 u32 field_index, int buffer_size, void *buffer) 240{ 241 struct hid_report *report; 242 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 243 int report_size; 244 int ret = 0; 245 u8 *val_ptr; 246 int buffer_index = 0; 247 int i; 248 249 memset(buffer, 0, buffer_size); 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); 270 271 val_ptr = (u8 *)report->field[field_index]->value; 272 for (i = 0; i < report->field[field_index]->report_count; ++i) { 273 if (buffer_index >= ret) 274 break; 275 276 memcpy(&((u8 *)buffer)[buffer_index], val_ptr, 277 report->field[field_index]->report_size / 8); 278 val_ptr += sizeof(__s32); 279 buffer_index += (report->field[field_index]->report_size / 8); 280 } 281 282done_proc: 283 mutex_unlock(&data->mutex); 284 285 return ret; 286} 287EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 288 289 290int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 291 u32 usage_id, 292 u32 attr_usage_id, u32 report_id, 293 enum sensor_hub_read_flags flag, 294 bool is_signed) 295{ 296 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 297 unsigned long flags; 298 struct hid_report *report; 299 int ret_val = 0; 300 301 report = sensor_hub_report(report_id, hsdev->hdev, 302 HID_INPUT_REPORT); 303 if (!report) 304 return -EINVAL; 305 306 mutex_lock(hsdev->mutex_ptr); 307 if (flag == SENSOR_HUB_SYNC) { 308 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 309 init_completion(&hsdev->pending.ready); 310 hsdev->pending.usage_id = usage_id; 311 hsdev->pending.attr_usage_id = attr_usage_id; 312 hsdev->pending.raw_size = 0; 313 314 spin_lock_irqsave(&data->lock, flags); 315 hsdev->pending.status = true; 316 spin_unlock_irqrestore(&data->lock, flags); 317 } 318 mutex_lock(&data->mutex); 319 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 320 mutex_unlock(&data->mutex); 321 if (flag == SENSOR_HUB_SYNC) { 322 wait_for_completion_interruptible_timeout( 323 &hsdev->pending.ready, HZ*5); 324 switch (hsdev->pending.raw_size) { 325 case 1: 326 if (is_signed) 327 ret_val = *(s8 *)hsdev->pending.raw_data; 328 else 329 ret_val = *(u8 *)hsdev->pending.raw_data; 330 break; 331 case 2: 332 if (is_signed) 333 ret_val = *(s16 *)hsdev->pending.raw_data; 334 else 335 ret_val = *(u16 *)hsdev->pending.raw_data; 336 break; 337 case 4: 338 ret_val = *(u32 *)hsdev->pending.raw_data; 339 break; 340 default: 341 ret_val = 0; 342 } 343 kfree(hsdev->pending.raw_data); 344 hsdev->pending.status = false; 345 } 346 mutex_unlock(hsdev->mutex_ptr); 347 348 return ret_val; 349} 350EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 351 352int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 353 u32 report_id, int field_index, u32 usage_id) 354{ 355 struct hid_report *report; 356 struct hid_field *field; 357 int i; 358 359 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 360 if (!report || (field_index >= report->maxfield)) 361 goto done_proc; 362 363 field = report->field[field_index]; 364 for (i = 0; i < field->maxusage; ++i) { 365 if (field->usage[i].hid == usage_id) 366 return field->usage[i].usage_index; 367 } 368 369done_proc: 370 return -EINVAL; 371} 372EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 373 374int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 375 u8 type, 376 u32 usage_id, 377 u32 attr_usage_id, 378 struct hid_sensor_hub_attribute_info *info) 379{ 380 int ret = -1; 381 int i; 382 struct hid_report *report; 383 struct hid_field *field; 384 struct hid_report_enum *report_enum; 385 struct hid_device *hdev = hsdev->hdev; 386 387 /* Initialize with defaults */ 388 info->usage_id = usage_id; 389 info->attrib_id = attr_usage_id; 390 info->report_id = -1; 391 info->index = -1; 392 info->units = -1; 393 info->unit_expo = -1; 394 395 report_enum = &hdev->report_enum[type]; 396 list_for_each_entry(report, &report_enum->report_list, list) { 397 for (i = 0; i < report->maxfield; ++i) { 398 field = report->field[i]; 399 if (field->maxusage) { 400 if ((field->physical == usage_id || 401 field->application == 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 ? report->field[i]->physical : 511 report->field[i]->application, 512 report->field[i]->usage[0].collection_index, 513 &hsdev, &priv); 514 if (!callback) { 515 ptr += sz; 516 continue; 517 } 518 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 519 report->field[i]->usage->hid || 520 hsdev->pending.attr_usage_id == 521 report->field[i]->logical)) { 522 hid_dbg(hdev, "data was pending ...\n"); 523 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 524 if (hsdev->pending.raw_data) 525 hsdev->pending.raw_size = sz; 526 else 527 hsdev->pending.raw_size = 0; 528 complete(&hsdev->pending.ready); 529 } 530 if (callback->capture_sample) { 531 if (report->field[i]->logical) 532 callback->capture_sample(hsdev, 533 report->field[i]->logical, sz, ptr, 534 callback->pdev); 535 else 536 callback->capture_sample(hsdev, 537 report->field[i]->usage->hid, sz, ptr, 538 callback->pdev); 539 } 540 ptr += sz; 541 } 542 if (callback && collection && callback->send_event) 543 callback->send_event(hsdev, collection->usage, 544 callback->pdev); 545 spin_unlock_irqrestore(&pdata->lock, flags); 546 547 return 1; 548} 549 550int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 551{ 552 int ret = 0; 553 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 554 555 mutex_lock(&data->mutex); 556 if (!data->ref_cnt) { 557 ret = hid_hw_open(hsdev->hdev); 558 if (ret) { 559 hid_err(hsdev->hdev, "failed to open hid device\n"); 560 mutex_unlock(&data->mutex); 561 return ret; 562 } 563 } 564 data->ref_cnt++; 565 mutex_unlock(&data->mutex); 566 567 return ret; 568} 569EXPORT_SYMBOL_GPL(sensor_hub_device_open); 570 571void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 572{ 573 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 574 575 mutex_lock(&data->mutex); 576 data->ref_cnt--; 577 if (!data->ref_cnt) 578 hid_hw_close(hsdev->hdev); 579 mutex_unlock(&data->mutex); 580} 581EXPORT_SYMBOL_GPL(sensor_hub_device_close); 582 583static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 584 unsigned int *rsize) 585{ 586 /* 587 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 588 * minimum for magnetic flux axis greater than the maximum. 589 */ 590 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 591 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 592 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 593 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 594 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 595 /* Sets negative logical minimum for mag x, y and z */ 596 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 597 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 598 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 599 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 600 } 601 602 return rdesc; 603} 604 605static int sensor_hub_probe(struct hid_device *hdev, 606 const struct hid_device_id *id) 607{ 608 int ret; 609 struct sensor_hub_data *sd; 610 int i; 611 char *name; 612 int dev_cnt; 613 struct hid_sensor_hub_device *hsdev; 614 struct hid_sensor_hub_device *last_hsdev = NULL; 615 struct hid_sensor_hub_device *collection_hsdev = NULL; 616 617 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 618 if (!sd) { 619 hid_err(hdev, "cannot allocate Sensor data\n"); 620 return -ENOMEM; 621 } 622 623 hid_set_drvdata(hdev, sd); 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, HID_CONNECT_DEFAULT | HID_CONNECT_DRIVER); 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