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 */ 29 struct 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 */ 47 struct 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 55 static 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 69 static 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 84 static 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 97 static 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 } 126 127 int 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 } 167 EXPORT_SYMBOL_GPL(sensor_hub_register_callback); 168 169 int 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 } 188 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); 189 190 int 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); 230 231 done_proc: 232 mutex_unlock(&data->mutex); 233 234 return ret; 235 } 236 EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 237 238 int 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 } 281 282 done_proc: 283 mutex_unlock(&data->mutex); 284 285 return ret; 286 } 287 EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 288 289 290 int 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 } 350 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 351 352 int 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 } 368 369 done_proc: 370 return -EINVAL; 371 } 372 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 373 374 int 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->logical == attr_usage_id || 402 field->usage[0].hid == 403 attr_usage_id) && 404 (field->usage[0].collection_index >= 405 hsdev->start_collection_index) && 406 (field->usage[0].collection_index < 407 hsdev->end_collection_index)) { 408 409 sensor_hub_fill_attr_info(info, i, 410 report->id, 411 field); 412 ret = 0; 413 break; 414 } 415 } 416 } 417 418 } 419 420 return ret; 421 } 422 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 423 424 #ifdef CONFIG_PM 425 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 426 { 427 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 428 struct hid_sensor_hub_callbacks_list *callback; 429 unsigned long flags; 430 431 hid_dbg(hdev, " sensor_hub_suspend\n"); 432 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 433 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 434 if (callback->usage_callback->suspend) 435 callback->usage_callback->suspend( 436 callback->hsdev, callback->priv); 437 } 438 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 439 440 return 0; 441 } 442 443 static int sensor_hub_resume(struct hid_device *hdev) 444 { 445 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 446 struct hid_sensor_hub_callbacks_list *callback; 447 unsigned long flags; 448 449 hid_dbg(hdev, " sensor_hub_resume\n"); 450 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 451 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 452 if (callback->usage_callback->resume) 453 callback->usage_callback->resume( 454 callback->hsdev, callback->priv); 455 } 456 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 457 458 return 0; 459 } 460 461 static int sensor_hub_reset_resume(struct hid_device *hdev) 462 { 463 return 0; 464 } 465 #endif 466 467 /* 468 * Handle raw report as sent by device 469 */ 470 static int sensor_hub_raw_event(struct hid_device *hdev, 471 struct hid_report *report, u8 *raw_data, int size) 472 { 473 int i; 474 u8 *ptr; 475 int sz; 476 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 477 unsigned long flags; 478 struct hid_sensor_hub_callbacks *callback = NULL; 479 struct hid_collection *collection = NULL; 480 void *priv = NULL; 481 struct hid_sensor_hub_device *hsdev = NULL; 482 483 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 484 report->id, size, report->type); 485 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 486 if (report->type != HID_INPUT_REPORT) 487 return 1; 488 489 ptr = raw_data; 490 if (report->id) 491 ptr++; /* Skip report id */ 492 493 spin_lock_irqsave(&pdata->lock, flags); 494 495 for (i = 0; i < report->maxfield; ++i) { 496 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 497 i, report->field[i]->usage->collection_index, 498 report->field[i]->usage->hid, 499 (report->field[i]->report_size * 500 report->field[i]->report_count)/8); 501 sz = (report->field[i]->report_size * 502 report->field[i]->report_count)/8; 503 collection = &hdev->collection[ 504 report->field[i]->usage->collection_index]; 505 hid_dbg(hdev, "collection->usage %x\n", 506 collection->usage); 507 508 callback = sensor_hub_get_callback(hdev, 509 report->field[i]->physical, 510 report->field[i]->usage[0].collection_index, 511 &hsdev, &priv); 512 if (!callback) { 513 ptr += sz; 514 continue; 515 } 516 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 517 report->field[i]->usage->hid || 518 hsdev->pending.attr_usage_id == 519 report->field[i]->logical)) { 520 hid_dbg(hdev, "data was pending ...\n"); 521 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 522 if (hsdev->pending.raw_data) 523 hsdev->pending.raw_size = sz; 524 else 525 hsdev->pending.raw_size = 0; 526 complete(&hsdev->pending.ready); 527 } 528 if (callback->capture_sample) { 529 if (report->field[i]->logical) 530 callback->capture_sample(hsdev, 531 report->field[i]->logical, sz, ptr, 532 callback->pdev); 533 else 534 callback->capture_sample(hsdev, 535 report->field[i]->usage->hid, sz, ptr, 536 callback->pdev); 537 } 538 ptr += sz; 539 } 540 if (callback && collection && callback->send_event) 541 callback->send_event(hsdev, collection->usage, 542 callback->pdev); 543 spin_unlock_irqrestore(&pdata->lock, flags); 544 545 return 1; 546 } 547 548 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 549 { 550 int ret = 0; 551 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 552 553 mutex_lock(&data->mutex); 554 if (!data->ref_cnt) { 555 ret = hid_hw_open(hsdev->hdev); 556 if (ret) { 557 hid_err(hsdev->hdev, "failed to open hid device\n"); 558 mutex_unlock(&data->mutex); 559 return ret; 560 } 561 } 562 data->ref_cnt++; 563 mutex_unlock(&data->mutex); 564 565 return ret; 566 } 567 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 568 569 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 570 { 571 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 572 573 mutex_lock(&data->mutex); 574 data->ref_cnt--; 575 if (!data->ref_cnt) 576 hid_hw_close(hsdev->hdev); 577 mutex_unlock(&data->mutex); 578 } 579 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 580 581 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 582 unsigned int *rsize) 583 { 584 /* 585 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 586 * minimum for magnetic flux axis greater than the maximum. 587 */ 588 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 589 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 590 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 591 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 592 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 593 /* Sets negative logical minimum for mag x, y and z */ 594 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 595 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 596 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 597 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 598 } 599 600 return rdesc; 601 } 602 603 static int sensor_hub_probe(struct hid_device *hdev, 604 const struct hid_device_id *id) 605 { 606 int ret; 607 struct sensor_hub_data *sd; 608 int i; 609 char *name; 610 int dev_cnt; 611 struct hid_sensor_hub_device *hsdev; 612 struct hid_sensor_hub_device *last_hsdev = NULL; 613 struct hid_sensor_hub_device *collection_hsdev = NULL; 614 615 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 616 if (!sd) { 617 hid_err(hdev, "cannot allocate Sensor data\n"); 618 return -ENOMEM; 619 } 620 621 hid_set_drvdata(hdev, sd); 622 623 spin_lock_init(&sd->lock); 624 spin_lock_init(&sd->dyn_callback_lock); 625 mutex_init(&sd->mutex); 626 ret = hid_parse(hdev); 627 if (ret) { 628 hid_err(hdev, "parse failed\n"); 629 return ret; 630 } 631 INIT_LIST_HEAD(&hdev->inputs); 632 633 ret = hid_hw_start(hdev, 0); 634 if (ret) { 635 hid_err(hdev, "hw start failed\n"); 636 return ret; 637 } 638 INIT_LIST_HEAD(&sd->dyn_callback_list); 639 sd->hid_sensor_client_cnt = 0; 640 641 dev_cnt = sensor_hub_get_physical_device_count(hdev); 642 if (dev_cnt > HID_MAX_PHY_DEVICES) { 643 hid_err(hdev, "Invalid Physical device count\n"); 644 ret = -EINVAL; 645 goto err_stop_hw; 646 } 647 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 648 dev_cnt, 649 sizeof(struct mfd_cell), 650 GFP_KERNEL); 651 if (sd->hid_sensor_hub_client_devs == NULL) { 652 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 653 ret = -ENOMEM; 654 goto err_stop_hw; 655 } 656 657 for (i = 0; i < hdev->maxcollection; ++i) { 658 struct hid_collection *collection = &hdev->collection[i]; 659 660 if (collection->type == HID_COLLECTION_PHYSICAL || 661 collection->type == HID_COLLECTION_APPLICATION) { 662 663 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 664 GFP_KERNEL); 665 if (!hsdev) { 666 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 667 ret = -ENOMEM; 668 goto err_stop_hw; 669 } 670 hsdev->hdev = hdev; 671 hsdev->vendor_id = hdev->vendor; 672 hsdev->product_id = hdev->product; 673 hsdev->usage = collection->usage; 674 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 675 sizeof(struct mutex), 676 GFP_KERNEL); 677 if (!hsdev->mutex_ptr) { 678 ret = -ENOMEM; 679 goto err_stop_hw; 680 } 681 mutex_init(hsdev->mutex_ptr); 682 hsdev->start_collection_index = i; 683 if (last_hsdev) 684 last_hsdev->end_collection_index = i; 685 last_hsdev = hsdev; 686 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 687 "HID-SENSOR-%x", 688 collection->usage); 689 if (name == NULL) { 690 hid_err(hdev, "Failed MFD device name\n"); 691 ret = -ENOMEM; 692 goto err_stop_hw; 693 } 694 sd->hid_sensor_hub_client_devs[ 695 sd->hid_sensor_client_cnt].name = name; 696 sd->hid_sensor_hub_client_devs[ 697 sd->hid_sensor_client_cnt].platform_data = 698 hsdev; 699 sd->hid_sensor_hub_client_devs[ 700 sd->hid_sensor_client_cnt].pdata_size = 701 sizeof(*hsdev); 702 hid_dbg(hdev, "Adding %s:%d\n", name, 703 hsdev->start_collection_index); 704 sd->hid_sensor_client_cnt++; 705 if (collection_hsdev) 706 collection_hsdev->end_collection_index = i; 707 if (collection->type == HID_COLLECTION_APPLICATION && 708 collection->usage == HID_USAGE_SENSOR_COLLECTION) 709 collection_hsdev = hsdev; 710 } 711 } 712 if (last_hsdev) 713 last_hsdev->end_collection_index = i; 714 if (collection_hsdev) 715 collection_hsdev->end_collection_index = i; 716 717 ret = mfd_add_hotplug_devices(&hdev->dev, 718 sd->hid_sensor_hub_client_devs, 719 sd->hid_sensor_client_cnt); 720 if (ret < 0) 721 goto err_stop_hw; 722 723 return ret; 724 725 err_stop_hw: 726 hid_hw_stop(hdev); 727 728 return ret; 729 } 730 731 static void sensor_hub_remove(struct hid_device *hdev) 732 { 733 struct sensor_hub_data *data = hid_get_drvdata(hdev); 734 unsigned long flags; 735 int i; 736 737 hid_dbg(hdev, " hardware removed\n"); 738 hid_hw_close(hdev); 739 hid_hw_stop(hdev); 740 spin_lock_irqsave(&data->lock, flags); 741 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 742 struct hid_sensor_hub_device *hsdev = 743 data->hid_sensor_hub_client_devs[i].platform_data; 744 if (hsdev->pending.status) 745 complete(&hsdev->pending.ready); 746 } 747 spin_unlock_irqrestore(&data->lock, flags); 748 mfd_remove_devices(&hdev->dev); 749 mutex_destroy(&data->mutex); 750 } 751 752 static const struct hid_device_id sensor_hub_devices[] = { 753 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 754 HID_ANY_ID) }, 755 { } 756 }; 757 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 758 759 static struct hid_driver sensor_hub_driver = { 760 .name = "hid-sensor-hub", 761 .id_table = sensor_hub_devices, 762 .probe = sensor_hub_probe, 763 .remove = sensor_hub_remove, 764 .raw_event = sensor_hub_raw_event, 765 .report_fixup = sensor_hub_report_fixup, 766 #ifdef CONFIG_PM 767 .suspend = sensor_hub_suspend, 768 .resume = sensor_hub_resume, 769 .reset_resume = sensor_hub_reset_resume, 770 #endif 771 }; 772 module_hid_driver(sensor_hub_driver); 773 774 MODULE_DESCRIPTION("HID Sensor Hub driver"); 775 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 776 MODULE_LICENSE("GPL"); 777