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 if (report->id) 487 ptr++; /* Skip report id */ 488 489 spin_lock_irqsave(&pdata->lock, flags); 490 491 for (i = 0; i < report->maxfield; ++i) { 492 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 493 i, report->field[i]->usage->collection_index, 494 report->field[i]->usage->hid, 495 (report->field[i]->report_size * 496 report->field[i]->report_count)/8); 497 sz = (report->field[i]->report_size * 498 report->field[i]->report_count)/8; 499 collection = &hdev->collection[ 500 report->field[i]->usage->collection_index]; 501 hid_dbg(hdev, "collection->usage %x\n", 502 collection->usage); 503 504 callback = sensor_hub_get_callback(hdev, 505 report->field[i]->physical, 506 report->field[i]->usage[0].collection_index, 507 &hsdev, &priv); 508 if (!callback) { 509 ptr += sz; 510 continue; 511 } 512 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 513 report->field[i]->usage->hid || 514 hsdev->pending.attr_usage_id == 515 report->field[i]->logical)) { 516 hid_dbg(hdev, "data was pending ...\n"); 517 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 518 if (hsdev->pending.raw_data) 519 hsdev->pending.raw_size = sz; 520 else 521 hsdev->pending.raw_size = 0; 522 complete(&hsdev->pending.ready); 523 } 524 if (callback->capture_sample) { 525 if (report->field[i]->logical) 526 callback->capture_sample(hsdev, 527 report->field[i]->logical, sz, ptr, 528 callback->pdev); 529 else 530 callback->capture_sample(hsdev, 531 report->field[i]->usage->hid, sz, ptr, 532 callback->pdev); 533 } 534 ptr += sz; 535 } 536 if (callback && collection && callback->send_event) 537 callback->send_event(hsdev, collection->usage, 538 callback->pdev); 539 spin_unlock_irqrestore(&pdata->lock, flags); 540 541 return 1; 542 } 543 544 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 545 { 546 int ret = 0; 547 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 548 549 mutex_lock(&data->mutex); 550 if (!data->ref_cnt) { 551 ret = hid_hw_open(hsdev->hdev); 552 if (ret) { 553 hid_err(hsdev->hdev, "failed to open hid device\n"); 554 mutex_unlock(&data->mutex); 555 return ret; 556 } 557 } 558 data->ref_cnt++; 559 mutex_unlock(&data->mutex); 560 561 return ret; 562 } 563 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 564 565 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 566 { 567 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 568 569 mutex_lock(&data->mutex); 570 data->ref_cnt--; 571 if (!data->ref_cnt) 572 hid_hw_close(hsdev->hdev); 573 mutex_unlock(&data->mutex); 574 } 575 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 576 577 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 578 unsigned int *rsize) 579 { 580 /* 581 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 582 * minimum for magnetic flux axis greater than the maximum. 583 */ 584 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 585 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 586 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 587 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 588 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 589 /* Sets negative logical minimum for mag x, y and z */ 590 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 591 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 592 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 593 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 594 } 595 596 return rdesc; 597 } 598 599 static int sensor_hub_probe(struct hid_device *hdev, 600 const struct hid_device_id *id) 601 { 602 int ret; 603 struct sensor_hub_data *sd; 604 int i; 605 char *name; 606 int dev_cnt; 607 struct hid_sensor_hub_device *hsdev; 608 struct hid_sensor_hub_device *last_hsdev = NULL; 609 struct hid_sensor_hub_device *collection_hsdev = NULL; 610 611 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 612 if (!sd) { 613 hid_err(hdev, "cannot allocate Sensor data\n"); 614 return -ENOMEM; 615 } 616 617 hid_set_drvdata(hdev, sd); 618 sd->quirks = id->driver_data; 619 620 spin_lock_init(&sd->lock); 621 spin_lock_init(&sd->dyn_callback_lock); 622 mutex_init(&sd->mutex); 623 ret = hid_parse(hdev); 624 if (ret) { 625 hid_err(hdev, "parse failed\n"); 626 return ret; 627 } 628 INIT_LIST_HEAD(&hdev->inputs); 629 630 ret = hid_hw_start(hdev, 0); 631 if (ret) { 632 hid_err(hdev, "hw start failed\n"); 633 return ret; 634 } 635 INIT_LIST_HEAD(&sd->dyn_callback_list); 636 sd->hid_sensor_client_cnt = 0; 637 638 dev_cnt = sensor_hub_get_physical_device_count(hdev); 639 if (dev_cnt > HID_MAX_PHY_DEVICES) { 640 hid_err(hdev, "Invalid Physical device count\n"); 641 ret = -EINVAL; 642 goto err_stop_hw; 643 } 644 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 645 dev_cnt, 646 sizeof(struct mfd_cell), 647 GFP_KERNEL); 648 if (sd->hid_sensor_hub_client_devs == NULL) { 649 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 650 ret = -ENOMEM; 651 goto err_stop_hw; 652 } 653 654 for (i = 0; i < hdev->maxcollection; ++i) { 655 struct hid_collection *collection = &hdev->collection[i]; 656 657 if (collection->type == HID_COLLECTION_PHYSICAL || 658 collection->type == HID_COLLECTION_APPLICATION) { 659 660 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 661 GFP_KERNEL); 662 if (!hsdev) { 663 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 664 ret = -ENOMEM; 665 goto err_stop_hw; 666 } 667 hsdev->hdev = hdev; 668 hsdev->vendor_id = hdev->vendor; 669 hsdev->product_id = hdev->product; 670 hsdev->usage = collection->usage; 671 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 672 sizeof(struct mutex), 673 GFP_KERNEL); 674 if (!hsdev->mutex_ptr) { 675 ret = -ENOMEM; 676 goto err_stop_hw; 677 } 678 mutex_init(hsdev->mutex_ptr); 679 hsdev->start_collection_index = i; 680 if (last_hsdev) 681 last_hsdev->end_collection_index = i; 682 last_hsdev = hsdev; 683 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 684 "HID-SENSOR-%x", 685 collection->usage); 686 if (name == NULL) { 687 hid_err(hdev, "Failed MFD device name\n"); 688 ret = -ENOMEM; 689 goto err_stop_hw; 690 } 691 sd->hid_sensor_hub_client_devs[ 692 sd->hid_sensor_client_cnt].name = name; 693 sd->hid_sensor_hub_client_devs[ 694 sd->hid_sensor_client_cnt].platform_data = 695 hsdev; 696 sd->hid_sensor_hub_client_devs[ 697 sd->hid_sensor_client_cnt].pdata_size = 698 sizeof(*hsdev); 699 hid_dbg(hdev, "Adding %s:%d\n", name, 700 hsdev->start_collection_index); 701 sd->hid_sensor_client_cnt++; 702 if (collection_hsdev) 703 collection_hsdev->end_collection_index = i; 704 if (collection->type == HID_COLLECTION_APPLICATION && 705 collection->usage == HID_USAGE_SENSOR_COLLECTION) 706 collection_hsdev = hsdev; 707 } 708 } 709 if (last_hsdev) 710 last_hsdev->end_collection_index = i; 711 if (collection_hsdev) 712 collection_hsdev->end_collection_index = i; 713 714 ret = mfd_add_hotplug_devices(&hdev->dev, 715 sd->hid_sensor_hub_client_devs, 716 sd->hid_sensor_client_cnt); 717 if (ret < 0) 718 goto err_stop_hw; 719 720 return ret; 721 722 err_stop_hw: 723 hid_hw_stop(hdev); 724 725 return ret; 726 } 727 728 static void sensor_hub_remove(struct hid_device *hdev) 729 { 730 struct sensor_hub_data *data = hid_get_drvdata(hdev); 731 unsigned long flags; 732 int i; 733 734 hid_dbg(hdev, " hardware removed\n"); 735 hid_hw_close(hdev); 736 hid_hw_stop(hdev); 737 spin_lock_irqsave(&data->lock, flags); 738 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 739 struct hid_sensor_hub_device *hsdev = 740 data->hid_sensor_hub_client_devs[i].platform_data; 741 if (hsdev->pending.status) 742 complete(&hsdev->pending.ready); 743 } 744 spin_unlock_irqrestore(&data->lock, flags); 745 mfd_remove_devices(&hdev->dev); 746 mutex_destroy(&data->mutex); 747 } 748 749 static const struct hid_device_id sensor_hub_devices[] = { 750 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 751 HID_ANY_ID) }, 752 { } 753 }; 754 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 755 756 static struct hid_driver sensor_hub_driver = { 757 .name = "hid-sensor-hub", 758 .id_table = sensor_hub_devices, 759 .probe = sensor_hub_probe, 760 .remove = sensor_hub_remove, 761 .raw_event = sensor_hub_raw_event, 762 .report_fixup = sensor_hub_report_fixup, 763 #ifdef CONFIG_PM 764 .suspend = sensor_hub_suspend, 765 .resume = sensor_hub_resume, 766 .reset_resume = sensor_hub_reset_resume, 767 #endif 768 }; 769 module_hid_driver(sensor_hub_driver); 770 771 MODULE_DESCRIPTION("HID Sensor Hub driver"); 772 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 773 MODULE_LICENSE("GPL"); 774