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_obj(*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 int sensor_hub_input_attr_read_values(struct hid_sensor_hub_device *hsdev, 290 u32 usage_id, u32 attr_usage_id, 291 u32 report_id, 292 enum sensor_hub_read_flags flag, 293 u32 buffer_size, u8 *buffer) 294 { 295 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 296 struct hid_report *report; 297 unsigned long flags; 298 long cycles; 299 int ret; 300 301 report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT); 302 if (!report) 303 return -EINVAL; 304 305 mutex_lock(hsdev->mutex_ptr); 306 if (flag == SENSOR_HUB_SYNC) { 307 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 308 init_completion(&hsdev->pending.ready); 309 hsdev->pending.usage_id = usage_id; 310 hsdev->pending.attr_usage_id = attr_usage_id; 311 hsdev->pending.max_raw_size = buffer_size; 312 hsdev->pending.raw_data = buffer; 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 ret = 0; 322 if (flag == SENSOR_HUB_SYNC) { 323 cycles = wait_for_completion_interruptible_timeout(&hsdev->pending.ready, 324 HZ * 5); 325 if (cycles == 0) 326 ret = -ETIMEDOUT; 327 else if (cycles < 0) 328 ret = cycles; 329 330 hsdev->pending.status = false; 331 } 332 mutex_unlock(hsdev->mutex_ptr); 333 334 return ret; 335 } 336 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_read_values); 337 338 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 339 u32 usage_id, 340 u32 attr_usage_id, u32 report_id, 341 enum sensor_hub_read_flags flag, 342 bool is_signed) 343 { 344 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 345 unsigned long flags; 346 struct hid_report *report; 347 int ret_val = 0; 348 349 report = sensor_hub_report(report_id, hsdev->hdev, 350 HID_INPUT_REPORT); 351 if (!report) 352 return -EINVAL; 353 354 mutex_lock(hsdev->mutex_ptr); 355 if (flag == SENSOR_HUB_SYNC) { 356 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 357 init_completion(&hsdev->pending.ready); 358 hsdev->pending.usage_id = usage_id; 359 hsdev->pending.attr_usage_id = attr_usage_id; 360 hsdev->pending.raw_size = 0; 361 362 spin_lock_irqsave(&data->lock, flags); 363 hsdev->pending.status = true; 364 spin_unlock_irqrestore(&data->lock, flags); 365 } 366 mutex_lock(&data->mutex); 367 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 368 mutex_unlock(&data->mutex); 369 if (flag == SENSOR_HUB_SYNC) { 370 wait_for_completion_interruptible_timeout( 371 &hsdev->pending.ready, HZ*5); 372 switch (hsdev->pending.raw_size) { 373 case 1: 374 if (is_signed) 375 ret_val = *(s8 *)hsdev->pending.raw_data; 376 else 377 ret_val = *(u8 *)hsdev->pending.raw_data; 378 break; 379 case 2: 380 if (is_signed) 381 ret_val = *(s16 *)hsdev->pending.raw_data; 382 else 383 ret_val = *(u16 *)hsdev->pending.raw_data; 384 break; 385 case 4: 386 ret_val = *(u32 *)hsdev->pending.raw_data; 387 break; 388 default: 389 ret_val = 0; 390 } 391 kfree(hsdev->pending.raw_data); 392 hsdev->pending.status = false; 393 } 394 mutex_unlock(hsdev->mutex_ptr); 395 396 return ret_val; 397 } 398 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 399 400 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 401 u32 report_id, int field_index, u32 usage_id) 402 { 403 struct hid_report *report; 404 struct hid_field *field; 405 int i; 406 407 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 408 if (!report || (field_index >= report->maxfield)) 409 goto done_proc; 410 411 field = report->field[field_index]; 412 for (i = 0; i < field->maxusage; ++i) { 413 if (field->usage[i].hid == usage_id) 414 return field->usage[i].usage_index; 415 } 416 417 done_proc: 418 return -EINVAL; 419 } 420 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 421 422 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 423 u8 type, 424 u32 usage_id, 425 u32 attr_usage_id, 426 struct hid_sensor_hub_attribute_info *info) 427 { 428 int ret = -1; 429 int i; 430 struct hid_report *report; 431 struct hid_field *field; 432 struct hid_report_enum *report_enum; 433 struct hid_device *hdev = hsdev->hdev; 434 435 /* Initialize with defaults */ 436 info->usage_id = usage_id; 437 info->attrib_id = attr_usage_id; 438 info->report_id = -1; 439 info->index = -1; 440 info->units = -1; 441 info->unit_expo = -1; 442 443 report_enum = &hdev->report_enum[type]; 444 list_for_each_entry(report, &report_enum->report_list, list) { 445 for (i = 0; i < report->maxfield; ++i) { 446 field = report->field[i]; 447 if (field->maxusage) { 448 if ((field->physical == usage_id || 449 field->application == usage_id) && 450 (field->logical == attr_usage_id || 451 field->usage[0].hid == 452 attr_usage_id) && 453 (field->usage[0].collection_index >= 454 hsdev->start_collection_index) && 455 (field->usage[0].collection_index < 456 hsdev->end_collection_index)) { 457 458 sensor_hub_fill_attr_info(info, i, 459 report->id, 460 field); 461 ret = 0; 462 break; 463 } 464 } 465 } 466 467 } 468 469 return ret; 470 } 471 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 472 473 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 474 { 475 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 476 struct hid_sensor_hub_callbacks_list *callback; 477 unsigned long flags; 478 479 hid_dbg(hdev, " sensor_hub_suspend\n"); 480 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 481 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 482 if (callback->usage_callback->suspend) 483 callback->usage_callback->suspend( 484 callback->hsdev, callback->priv); 485 } 486 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 487 488 return 0; 489 } 490 491 static int sensor_hub_resume(struct hid_device *hdev) 492 { 493 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 494 struct hid_sensor_hub_callbacks_list *callback; 495 unsigned long flags; 496 497 hid_dbg(hdev, " sensor_hub_resume\n"); 498 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 499 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 500 if (callback->usage_callback->resume) 501 callback->usage_callback->resume( 502 callback->hsdev, callback->priv); 503 } 504 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 505 506 return 0; 507 } 508 509 static int sensor_hub_reset_resume(struct hid_device *hdev) 510 { 511 return 0; 512 } 513 514 /* 515 * Handle raw report as sent by device 516 */ 517 static int sensor_hub_raw_event(struct hid_device *hdev, 518 struct hid_report *report, u8 *raw_data, int size) 519 { 520 int i; 521 u8 *ptr; 522 int sz; 523 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 524 unsigned long flags; 525 struct hid_sensor_hub_callbacks *callback = NULL; 526 struct hid_collection *collection = NULL; 527 void *priv = NULL; 528 struct hid_sensor_hub_device *hsdev = NULL; 529 u32 copy_size; 530 u32 avail; 531 532 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 533 report->id, size, report->type); 534 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 535 if (report->type != HID_INPUT_REPORT) 536 return 1; 537 538 ptr = raw_data; 539 if (report->id) 540 ptr++; /* Skip report id */ 541 542 spin_lock_irqsave(&pdata->lock, flags); 543 544 for (i = 0; i < report->maxfield; ++i) { 545 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 546 i, report->field[i]->usage->collection_index, 547 report->field[i]->usage->hid, 548 (report->field[i]->report_size * 549 report->field[i]->report_count)/8); 550 sz = (report->field[i]->report_size * 551 report->field[i]->report_count)/8; 552 collection = &hdev->collection[ 553 report->field[i]->usage->collection_index]; 554 hid_dbg(hdev, "collection->usage %x\n", 555 collection->usage); 556 557 callback = sensor_hub_get_callback(hdev, 558 report->field[i]->physical ? report->field[i]->physical : 559 report->field[i]->application, 560 report->field[i]->usage[0].collection_index, 561 &hsdev, &priv); 562 if (!callback) { 563 ptr += sz; 564 continue; 565 } 566 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 567 report->field[i]->usage->hid || 568 hsdev->pending.attr_usage_id == 569 report->field[i]->logical)) { 570 hid_dbg(hdev, "data was pending ...\n"); 571 if (hsdev->pending.max_raw_size) { 572 if (hsdev->pending.index < hsdev->pending.max_raw_size) { 573 avail = hsdev->pending.max_raw_size - hsdev->pending.index; 574 copy_size = clamp(sz, 0U, avail); 575 576 memcpy(hsdev->pending.raw_data + hsdev->pending.index, 577 ptr, copy_size); 578 hsdev->pending.index += copy_size; 579 if (hsdev->pending.index >= hsdev->pending.max_raw_size) { 580 hsdev->pending.raw_size = hsdev->pending.index; 581 complete(&hsdev->pending.ready); 582 } 583 } 584 } else { 585 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 586 if (hsdev->pending.raw_data) 587 hsdev->pending.raw_size = sz; 588 else 589 hsdev->pending.raw_size = 0; 590 complete(&hsdev->pending.ready); 591 } 592 } 593 if (callback->capture_sample) { 594 if (report->field[i]->logical) 595 callback->capture_sample(hsdev, 596 report->field[i]->logical, sz, ptr, 597 callback->pdev); 598 else 599 callback->capture_sample(hsdev, 600 report->field[i]->usage->hid, sz, ptr, 601 callback->pdev); 602 } 603 ptr += sz; 604 } 605 if (callback && collection && callback->send_event) 606 callback->send_event(hsdev, collection->usage, 607 callback->pdev); 608 spin_unlock_irqrestore(&pdata->lock, flags); 609 610 return 1; 611 } 612 613 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 614 { 615 int ret = 0; 616 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 617 618 mutex_lock(&data->mutex); 619 if (!data->ref_cnt) { 620 ret = hid_hw_open(hsdev->hdev); 621 if (ret) { 622 hid_err(hsdev->hdev, "failed to open hid device\n"); 623 mutex_unlock(&data->mutex); 624 return ret; 625 } 626 } 627 data->ref_cnt++; 628 mutex_unlock(&data->mutex); 629 630 return ret; 631 } 632 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 633 634 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 635 { 636 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 637 638 mutex_lock(&data->mutex); 639 data->ref_cnt--; 640 if (!data->ref_cnt) 641 hid_hw_close(hsdev->hdev); 642 mutex_unlock(&data->mutex); 643 } 644 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 645 646 static const __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 647 unsigned int *rsize) 648 { 649 /* 650 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 651 * minimum for magnetic flux axis greater than the maximum. 652 */ 653 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 654 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 655 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 656 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 657 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 658 /* Sets negative logical minimum for mag x, y and z */ 659 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 660 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 661 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 662 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 663 } 664 665 return rdesc; 666 } 667 668 static int sensor_hub_probe(struct hid_device *hdev, 669 const struct hid_device_id *id) 670 { 671 int ret; 672 struct sensor_hub_data *sd; 673 int i; 674 char *name; 675 int dev_cnt; 676 struct hid_sensor_hub_device *hsdev; 677 struct hid_sensor_hub_device *last_hsdev = NULL; 678 struct hid_sensor_hub_device *collection_hsdev = NULL; 679 680 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 681 if (!sd) { 682 hid_err(hdev, "cannot allocate Sensor data\n"); 683 return -ENOMEM; 684 } 685 686 hid_set_drvdata(hdev, sd); 687 688 spin_lock_init(&sd->lock); 689 spin_lock_init(&sd->dyn_callback_lock); 690 mutex_init(&sd->mutex); 691 ret = hid_parse(hdev); 692 if (ret) { 693 hid_err(hdev, "parse failed\n"); 694 return ret; 695 } 696 INIT_LIST_HEAD(&hdev->inputs); 697 698 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT | HID_CONNECT_DRIVER); 699 if (ret) { 700 hid_err(hdev, "hw start failed\n"); 701 return ret; 702 } 703 INIT_LIST_HEAD(&sd->dyn_callback_list); 704 sd->hid_sensor_client_cnt = 0; 705 706 dev_cnt = sensor_hub_get_physical_device_count(hdev); 707 if (dev_cnt > HID_MAX_PHY_DEVICES) { 708 hid_err(hdev, "Invalid Physical device count\n"); 709 ret = -EINVAL; 710 goto err_stop_hw; 711 } 712 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 713 dev_cnt, 714 sizeof(struct mfd_cell), 715 GFP_KERNEL); 716 if (sd->hid_sensor_hub_client_devs == NULL) { 717 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 718 ret = -ENOMEM; 719 goto err_stop_hw; 720 } 721 722 for (i = 0; i < hdev->maxcollection; ++i) { 723 struct hid_collection *collection = &hdev->collection[i]; 724 725 if (collection->type == HID_COLLECTION_PHYSICAL || 726 collection->type == HID_COLLECTION_APPLICATION) { 727 728 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 729 GFP_KERNEL); 730 if (!hsdev) { 731 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 732 ret = -ENOMEM; 733 goto err_stop_hw; 734 } 735 hsdev->hdev = hdev; 736 hsdev->vendor_id = hdev->vendor; 737 hsdev->product_id = hdev->product; 738 hsdev->usage = collection->usage; 739 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 740 sizeof(struct mutex), 741 GFP_KERNEL); 742 if (!hsdev->mutex_ptr) { 743 ret = -ENOMEM; 744 goto err_stop_hw; 745 } 746 mutex_init(hsdev->mutex_ptr); 747 hsdev->start_collection_index = i; 748 if (last_hsdev) 749 last_hsdev->end_collection_index = i; 750 last_hsdev = hsdev; 751 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 752 "HID-SENSOR-%x", 753 collection->usage); 754 if (name == NULL) { 755 hid_err(hdev, "Failed MFD device name\n"); 756 ret = -ENOMEM; 757 goto err_stop_hw; 758 } 759 sd->hid_sensor_hub_client_devs[ 760 sd->hid_sensor_client_cnt].name = name; 761 sd->hid_sensor_hub_client_devs[ 762 sd->hid_sensor_client_cnt].platform_data = 763 hsdev; 764 sd->hid_sensor_hub_client_devs[ 765 sd->hid_sensor_client_cnt].pdata_size = 766 sizeof(*hsdev); 767 hid_dbg(hdev, "Adding %s:%d\n", name, 768 hsdev->start_collection_index); 769 sd->hid_sensor_client_cnt++; 770 if (collection_hsdev) 771 collection_hsdev->end_collection_index = i; 772 if (collection->type == HID_COLLECTION_APPLICATION && 773 collection->usage == HID_USAGE_SENSOR_COLLECTION) 774 collection_hsdev = hsdev; 775 } 776 } 777 if (last_hsdev) 778 last_hsdev->end_collection_index = i; 779 if (collection_hsdev) 780 collection_hsdev->end_collection_index = i; 781 782 ret = mfd_add_hotplug_devices(&hdev->dev, 783 sd->hid_sensor_hub_client_devs, 784 sd->hid_sensor_client_cnt); 785 if (ret < 0) 786 goto err_stop_hw; 787 788 return ret; 789 790 err_stop_hw: 791 hid_hw_stop(hdev); 792 793 return ret; 794 } 795 796 static int sensor_hub_finalize_pending_fn(struct device *dev, void *data) 797 { 798 struct hid_sensor_hub_device *hsdev = dev->platform_data; 799 800 if (hsdev->pending.status) 801 complete(&hsdev->pending.ready); 802 803 return 0; 804 } 805 806 static void sensor_hub_remove(struct hid_device *hdev) 807 { 808 struct sensor_hub_data *data = hid_get_drvdata(hdev); 809 unsigned long flags; 810 811 hid_dbg(hdev, " hardware removed\n"); 812 hid_hw_close(hdev); 813 hid_hw_stop(hdev); 814 815 spin_lock_irqsave(&data->lock, flags); 816 device_for_each_child(&hdev->dev, NULL, 817 sensor_hub_finalize_pending_fn); 818 spin_unlock_irqrestore(&data->lock, flags); 819 820 mfd_remove_devices(&hdev->dev); 821 mutex_destroy(&data->mutex); 822 } 823 824 static const struct hid_device_id sensor_hub_devices[] = { 825 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 826 HID_ANY_ID) }, 827 { } 828 }; 829 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 830 831 static struct hid_driver sensor_hub_driver = { 832 .name = "hid-sensor-hub", 833 .id_table = sensor_hub_devices, 834 .probe = sensor_hub_probe, 835 .remove = sensor_hub_remove, 836 .raw_event = sensor_hub_raw_event, 837 .report_fixup = sensor_hub_report_fixup, 838 .suspend = pm_ptr(sensor_hub_suspend), 839 .resume = pm_ptr(sensor_hub_resume), 840 .reset_resume = pm_ptr(sensor_hub_reset_resume), 841 }; 842 module_hid_driver(sensor_hub_driver); 843 844 MODULE_DESCRIPTION("HID Sensor Hub driver"); 845 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 846 MODULE_LICENSE("GPL"); 847