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 */ 30 struct 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 */ 48 struct 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 56 static 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 70 static 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 85 static 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 98 static 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 } 127 128 int 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 } 168 EXPORT_SYMBOL_GPL(sensor_hub_register_callback); 169 170 int 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 } 189 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); 190 191 int 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 hid_set_field(report->field[field_index], i, 214 (__force __s32)cpu_to_le32(*buf32)); 215 ++buf32; 216 } 217 } 218 if (remaining_bytes) { 219 value = 0; 220 memcpy(&value, (u8 *)buf32, remaining_bytes); 221 hid_set_field(report->field[field_index], i, 222 (__force __s32)cpu_to_le32(value)); 223 } 224 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); 225 hid_hw_wait(hsdev->hdev); 226 227 done_proc: 228 mutex_unlock(&data->mutex); 229 230 return ret; 231 } 232 EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 233 234 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 235 u32 field_index, int buffer_size, void *buffer) 236 { 237 struct hid_report *report; 238 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 239 int report_size; 240 int ret = 0; 241 u8 *val_ptr; 242 int buffer_index = 0; 243 int i; 244 245 memset(buffer, 0, buffer_size); 246 247 mutex_lock(&data->mutex); 248 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 249 if (!report || (field_index >= report->maxfield) || 250 report->field[field_index]->report_count < 1) { 251 ret = -EINVAL; 252 goto done_proc; 253 } 254 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 255 hid_hw_wait(hsdev->hdev); 256 257 /* calculate number of bytes required to read this field */ 258 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 259 8) * 260 report->field[field_index]->report_count; 261 if (!report_size) { 262 ret = -EINVAL; 263 goto done_proc; 264 } 265 ret = min(report_size, buffer_size); 266 267 val_ptr = (u8 *)report->field[field_index]->value; 268 for (i = 0; i < report->field[field_index]->report_count; ++i) { 269 if (buffer_index >= ret) 270 break; 271 272 memcpy(&((u8 *)buffer)[buffer_index], val_ptr, 273 report->field[field_index]->report_size / 8); 274 val_ptr += sizeof(__s32); 275 buffer_index += (report->field[field_index]->report_size / 8); 276 } 277 278 done_proc: 279 mutex_unlock(&data->mutex); 280 281 return ret; 282 } 283 EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 284 285 286 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 287 u32 usage_id, 288 u32 attr_usage_id, u32 report_id, 289 enum sensor_hub_read_flags flag, 290 bool is_signed) 291 { 292 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 293 unsigned long flags; 294 struct hid_report *report; 295 int ret_val = 0; 296 297 report = sensor_hub_report(report_id, hsdev->hdev, 298 HID_INPUT_REPORT); 299 if (!report) 300 return -EINVAL; 301 302 mutex_lock(hsdev->mutex_ptr); 303 if (flag == SENSOR_HUB_SYNC) { 304 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 305 init_completion(&hsdev->pending.ready); 306 hsdev->pending.usage_id = usage_id; 307 hsdev->pending.attr_usage_id = attr_usage_id; 308 hsdev->pending.raw_size = 0; 309 310 spin_lock_irqsave(&data->lock, flags); 311 hsdev->pending.status = true; 312 spin_unlock_irqrestore(&data->lock, flags); 313 } 314 mutex_lock(&data->mutex); 315 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 316 mutex_unlock(&data->mutex); 317 if (flag == SENSOR_HUB_SYNC) { 318 wait_for_completion_interruptible_timeout( 319 &hsdev->pending.ready, HZ*5); 320 switch (hsdev->pending.raw_size) { 321 case 1: 322 if (is_signed) 323 ret_val = *(s8 *)hsdev->pending.raw_data; 324 else 325 ret_val = *(u8 *)hsdev->pending.raw_data; 326 break; 327 case 2: 328 if (is_signed) 329 ret_val = *(s16 *)hsdev->pending.raw_data; 330 else 331 ret_val = *(u16 *)hsdev->pending.raw_data; 332 break; 333 case 4: 334 ret_val = *(u32 *)hsdev->pending.raw_data; 335 break; 336 default: 337 ret_val = 0; 338 } 339 kfree(hsdev->pending.raw_data); 340 hsdev->pending.status = false; 341 } 342 mutex_unlock(hsdev->mutex_ptr); 343 344 return ret_val; 345 } 346 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 347 348 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 349 u32 report_id, int field_index, u32 usage_id) 350 { 351 struct hid_report *report; 352 struct hid_field *field; 353 int i; 354 355 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 356 if (!report || (field_index >= report->maxfield)) 357 goto done_proc; 358 359 field = report->field[field_index]; 360 for (i = 0; i < field->maxusage; ++i) { 361 if (field->usage[i].hid == usage_id) 362 return field->usage[i].usage_index; 363 } 364 365 done_proc: 366 return -EINVAL; 367 } 368 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 369 370 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 371 u8 type, 372 u32 usage_id, 373 u32 attr_usage_id, 374 struct hid_sensor_hub_attribute_info *info) 375 { 376 int ret = -1; 377 int i; 378 struct hid_report *report; 379 struct hid_field *field; 380 struct hid_report_enum *report_enum; 381 struct hid_device *hdev = hsdev->hdev; 382 383 /* Initialize with defaults */ 384 info->usage_id = usage_id; 385 info->attrib_id = attr_usage_id; 386 info->report_id = -1; 387 info->index = -1; 388 info->units = -1; 389 info->unit_expo = -1; 390 391 report_enum = &hdev->report_enum[type]; 392 list_for_each_entry(report, &report_enum->report_list, list) { 393 for (i = 0; i < report->maxfield; ++i) { 394 field = report->field[i]; 395 if (field->maxusage) { 396 if (field->physical == usage_id && 397 (field->logical == attr_usage_id || 398 field->usage[0].hid == 399 attr_usage_id) && 400 (field->usage[0].collection_index >= 401 hsdev->start_collection_index) && 402 (field->usage[0].collection_index < 403 hsdev->end_collection_index)) { 404 405 sensor_hub_fill_attr_info(info, i, 406 report->id, 407 field); 408 ret = 0; 409 break; 410 } 411 } 412 } 413 414 } 415 416 return ret; 417 } 418 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 419 420 #ifdef CONFIG_PM 421 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 422 { 423 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 424 struct hid_sensor_hub_callbacks_list *callback; 425 unsigned long flags; 426 427 hid_dbg(hdev, " sensor_hub_suspend\n"); 428 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 429 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 430 if (callback->usage_callback->suspend) 431 callback->usage_callback->suspend( 432 callback->hsdev, callback->priv); 433 } 434 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 435 436 return 0; 437 } 438 439 static int sensor_hub_resume(struct hid_device *hdev) 440 { 441 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 442 struct hid_sensor_hub_callbacks_list *callback; 443 unsigned long flags; 444 445 hid_dbg(hdev, " sensor_hub_resume\n"); 446 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 447 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 448 if (callback->usage_callback->resume) 449 callback->usage_callback->resume( 450 callback->hsdev, callback->priv); 451 } 452 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 453 454 return 0; 455 } 456 457 static int sensor_hub_reset_resume(struct hid_device *hdev) 458 { 459 return 0; 460 } 461 #endif 462 463 /* 464 * Handle raw report as sent by device 465 */ 466 static int sensor_hub_raw_event(struct hid_device *hdev, 467 struct hid_report *report, u8 *raw_data, int size) 468 { 469 int i; 470 u8 *ptr; 471 int sz; 472 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 473 unsigned long flags; 474 struct hid_sensor_hub_callbacks *callback = NULL; 475 struct hid_collection *collection = NULL; 476 void *priv = NULL; 477 struct hid_sensor_hub_device *hsdev = NULL; 478 479 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 480 report->id, size, report->type); 481 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 482 if (report->type != HID_INPUT_REPORT) 483 return 1; 484 485 ptr = raw_data; 486 ptr++; /* Skip report id */ 487 488 spin_lock_irqsave(&pdata->lock, flags); 489 490 for (i = 0; i < report->maxfield; ++i) { 491 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 492 i, report->field[i]->usage->collection_index, 493 report->field[i]->usage->hid, 494 (report->field[i]->report_size * 495 report->field[i]->report_count)/8); 496 sz = (report->field[i]->report_size * 497 report->field[i]->report_count)/8; 498 collection = &hdev->collection[ 499 report->field[i]->usage->collection_index]; 500 hid_dbg(hdev, "collection->usage %x\n", 501 collection->usage); 502 503 callback = sensor_hub_get_callback(hdev, 504 report->field[i]->physical, 505 report->field[i]->usage[0].collection_index, 506 &hsdev, &priv); 507 if (!callback) { 508 ptr += sz; 509 continue; 510 } 511 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 512 report->field[i]->usage->hid || 513 hsdev->pending.attr_usage_id == 514 report->field[i]->logical)) { 515 hid_dbg(hdev, "data was pending ...\n"); 516 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 517 if (hsdev->pending.raw_data) 518 hsdev->pending.raw_size = sz; 519 else 520 hsdev->pending.raw_size = 0; 521 complete(&hsdev->pending.ready); 522 } 523 if (callback->capture_sample) { 524 if (report->field[i]->logical) 525 callback->capture_sample(hsdev, 526 report->field[i]->logical, sz, ptr, 527 callback->pdev); 528 else 529 callback->capture_sample(hsdev, 530 report->field[i]->usage->hid, sz, ptr, 531 callback->pdev); 532 } 533 ptr += sz; 534 } 535 if (callback && collection && callback->send_event) 536 callback->send_event(hsdev, collection->usage, 537 callback->pdev); 538 spin_unlock_irqrestore(&pdata->lock, flags); 539 540 return 1; 541 } 542 543 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 544 { 545 int ret = 0; 546 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 547 548 mutex_lock(&data->mutex); 549 if (!data->ref_cnt) { 550 ret = hid_hw_open(hsdev->hdev); 551 if (ret) { 552 hid_err(hsdev->hdev, "failed to open hid device\n"); 553 mutex_unlock(&data->mutex); 554 return ret; 555 } 556 } 557 data->ref_cnt++; 558 mutex_unlock(&data->mutex); 559 560 return ret; 561 } 562 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 563 564 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 565 { 566 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 567 568 mutex_lock(&data->mutex); 569 data->ref_cnt--; 570 if (!data->ref_cnt) 571 hid_hw_close(hsdev->hdev); 572 mutex_unlock(&data->mutex); 573 } 574 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 575 576 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 577 unsigned int *rsize) 578 { 579 /* 580 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 581 * minimum for magnetic flux axis greater than the maximum. 582 */ 583 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 584 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 585 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 586 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 587 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 588 /* Sets negative logical minimum for mag x, y and z */ 589 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 590 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 591 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 592 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 593 } 594 595 return rdesc; 596 } 597 598 static int sensor_hub_probe(struct hid_device *hdev, 599 const struct hid_device_id *id) 600 { 601 int ret; 602 struct sensor_hub_data *sd; 603 int i; 604 char *name; 605 int dev_cnt; 606 struct hid_sensor_hub_device *hsdev; 607 struct hid_sensor_hub_device *last_hsdev = NULL; 608 struct hid_sensor_hub_device *collection_hsdev = NULL; 609 610 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 611 if (!sd) { 612 hid_err(hdev, "cannot allocate Sensor data\n"); 613 return -ENOMEM; 614 } 615 616 hid_set_drvdata(hdev, sd); 617 sd->quirks = id->driver_data; 618 619 spin_lock_init(&sd->lock); 620 spin_lock_init(&sd->dyn_callback_lock); 621 mutex_init(&sd->mutex); 622 ret = hid_parse(hdev); 623 if (ret) { 624 hid_err(hdev, "parse failed\n"); 625 return ret; 626 } 627 INIT_LIST_HEAD(&hdev->inputs); 628 629 ret = hid_hw_start(hdev, 0); 630 if (ret) { 631 hid_err(hdev, "hw start failed\n"); 632 return ret; 633 } 634 INIT_LIST_HEAD(&sd->dyn_callback_list); 635 sd->hid_sensor_client_cnt = 0; 636 637 dev_cnt = sensor_hub_get_physical_device_count(hdev); 638 if (dev_cnt > HID_MAX_PHY_DEVICES) { 639 hid_err(hdev, "Invalid Physical device count\n"); 640 ret = -EINVAL; 641 goto err_stop_hw; 642 } 643 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 644 dev_cnt, 645 sizeof(struct mfd_cell), 646 GFP_KERNEL); 647 if (sd->hid_sensor_hub_client_devs == NULL) { 648 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 649 ret = -ENOMEM; 650 goto err_stop_hw; 651 } 652 653 for (i = 0; i < hdev->maxcollection; ++i) { 654 struct hid_collection *collection = &hdev->collection[i]; 655 656 if (collection->type == HID_COLLECTION_PHYSICAL || 657 collection->type == HID_COLLECTION_APPLICATION) { 658 659 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 660 GFP_KERNEL); 661 if (!hsdev) { 662 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 663 ret = -ENOMEM; 664 goto err_stop_hw; 665 } 666 hsdev->hdev = hdev; 667 hsdev->vendor_id = hdev->vendor; 668 hsdev->product_id = hdev->product; 669 hsdev->usage = collection->usage; 670 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 671 sizeof(struct mutex), 672 GFP_KERNEL); 673 if (!hsdev->mutex_ptr) { 674 ret = -ENOMEM; 675 goto err_stop_hw; 676 } 677 mutex_init(hsdev->mutex_ptr); 678 hsdev->start_collection_index = i; 679 if (last_hsdev) 680 last_hsdev->end_collection_index = i; 681 last_hsdev = hsdev; 682 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 683 "HID-SENSOR-%x", 684 collection->usage); 685 if (name == NULL) { 686 hid_err(hdev, "Failed MFD device name\n"); 687 ret = -ENOMEM; 688 goto err_stop_hw; 689 } 690 sd->hid_sensor_hub_client_devs[ 691 sd->hid_sensor_client_cnt].name = name; 692 sd->hid_sensor_hub_client_devs[ 693 sd->hid_sensor_client_cnt].platform_data = 694 hsdev; 695 sd->hid_sensor_hub_client_devs[ 696 sd->hid_sensor_client_cnt].pdata_size = 697 sizeof(*hsdev); 698 hid_dbg(hdev, "Adding %s:%d\n", name, 699 hsdev->start_collection_index); 700 sd->hid_sensor_client_cnt++; 701 if (collection_hsdev) 702 collection_hsdev->end_collection_index = i; 703 if (collection->type == HID_COLLECTION_APPLICATION && 704 collection->usage == HID_USAGE_SENSOR_COLLECTION) 705 collection_hsdev = hsdev; 706 } 707 } 708 if (last_hsdev) 709 last_hsdev->end_collection_index = i; 710 if (collection_hsdev) 711 collection_hsdev->end_collection_index = i; 712 713 ret = mfd_add_hotplug_devices(&hdev->dev, 714 sd->hid_sensor_hub_client_devs, 715 sd->hid_sensor_client_cnt); 716 if (ret < 0) 717 goto err_stop_hw; 718 719 return ret; 720 721 err_stop_hw: 722 hid_hw_stop(hdev); 723 724 return ret; 725 } 726 727 static void sensor_hub_remove(struct hid_device *hdev) 728 { 729 struct sensor_hub_data *data = hid_get_drvdata(hdev); 730 unsigned long flags; 731 int i; 732 733 hid_dbg(hdev, " hardware removed\n"); 734 hid_hw_close(hdev); 735 hid_hw_stop(hdev); 736 spin_lock_irqsave(&data->lock, flags); 737 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 738 struct hid_sensor_hub_device *hsdev = 739 data->hid_sensor_hub_client_devs[i].platform_data; 740 if (hsdev->pending.status) 741 complete(&hsdev->pending.ready); 742 } 743 spin_unlock_irqrestore(&data->lock, flags); 744 mfd_remove_devices(&hdev->dev); 745 mutex_destroy(&data->mutex); 746 } 747 748 static const struct hid_device_id sensor_hub_devices[] = { 749 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 750 HID_ANY_ID) }, 751 { } 752 }; 753 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 754 755 static struct hid_driver sensor_hub_driver = { 756 .name = "hid-sensor-hub", 757 .id_table = sensor_hub_devices, 758 .probe = sensor_hub_probe, 759 .remove = sensor_hub_remove, 760 .raw_event = sensor_hub_raw_event, 761 .report_fixup = sensor_hub_report_fixup, 762 #ifdef CONFIG_PM 763 .suspend = sensor_hub_suspend, 764 .resume = sensor_hub_resume, 765 .reset_resume = sensor_hub_reset_resume, 766 #endif 767 }; 768 module_hid_driver(sensor_hub_driver); 769 770 MODULE_DESCRIPTION("HID Sensor Hub driver"); 771 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 772 MODULE_LICENSE("GPL"); 773