1 /* 2 * HID Sensors Driver 3 * Copyright (c) 2012, Intel Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 */ 19 20 #include <linux/device.h> 21 #include <linux/hid.h> 22 #include <linux/module.h> 23 #include <linux/slab.h> 24 #include <linux/mfd/core.h> 25 #include <linux/list.h> 26 #include <linux/hid-sensor-ids.h> 27 #include <linux/hid-sensor-hub.h> 28 #include "hid-ids.h" 29 30 #define HID_SENSOR_HUB_ENUM_QUIRK 0x01 31 32 /** 33 * struct sensor_hub_data - Hold a instance data for a HID hub device 34 * @hsdev: Stored hid instance for current hub device. 35 * @mutex: Mutex to serialize synchronous request. 36 * @lock: Spin lock to protect pending request structure. 37 * @dyn_callback_list: Holds callback function 38 * @dyn_callback_lock: spin lock to protect callback list 39 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. 40 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). 41 * @ref_cnt: Number of MFD clients have opened this device 42 */ 43 struct sensor_hub_data { 44 struct mutex mutex; 45 spinlock_t lock; 46 struct list_head dyn_callback_list; 47 spinlock_t dyn_callback_lock; 48 struct mfd_cell *hid_sensor_hub_client_devs; 49 int hid_sensor_client_cnt; 50 unsigned long quirks; 51 int ref_cnt; 52 }; 53 54 /** 55 * struct hid_sensor_hub_callbacks_list - Stores callback list 56 * @list: list head. 57 * @usage_id: usage id for a physical device. 58 * @usage_callback: Stores registered callback functions. 59 * @priv: Private data for a physical device. 60 */ 61 struct hid_sensor_hub_callbacks_list { 62 struct list_head list; 63 u32 usage_id; 64 struct hid_sensor_hub_device *hsdev; 65 struct hid_sensor_hub_callbacks *usage_callback; 66 void *priv; 67 }; 68 69 static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, 70 int dir) 71 { 72 struct hid_report *report; 73 74 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { 75 if (report->id == id) 76 return report; 77 } 78 hid_warn(hdev, "No report with id 0x%x found\n", id); 79 80 return NULL; 81 } 82 83 static int sensor_hub_get_physical_device_count(struct hid_device *hdev) 84 { 85 int i; 86 int count = 0; 87 88 for (i = 0; i < hdev->maxcollection; ++i) { 89 struct hid_collection *collection = &hdev->collection[i]; 90 if (collection->type == HID_COLLECTION_PHYSICAL || 91 collection->type == HID_COLLECTION_APPLICATION) 92 ++count; 93 } 94 95 return count; 96 } 97 98 static void sensor_hub_fill_attr_info( 99 struct hid_sensor_hub_attribute_info *info, 100 s32 index, s32 report_id, struct hid_field *field) 101 { 102 info->index = index; 103 info->report_id = report_id; 104 info->units = field->unit; 105 info->unit_expo = field->unit_exponent; 106 info->size = (field->report_size * field->report_count)/8; 107 info->logical_minimum = field->logical_minimum; 108 info->logical_maximum = field->logical_maximum; 109 } 110 111 static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( 112 struct hid_device *hdev, 113 u32 usage_id, 114 int collection_index, 115 struct hid_sensor_hub_device **hsdev, 116 void **priv) 117 { 118 struct hid_sensor_hub_callbacks_list *callback; 119 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 120 unsigned long flags; 121 122 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 123 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 124 if ((callback->usage_id == usage_id || 125 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && 126 (collection_index >= 127 callback->hsdev->start_collection_index) && 128 (collection_index < 129 callback->hsdev->end_collection_index)) { 130 *priv = callback->priv; 131 *hsdev = callback->hsdev; 132 spin_unlock_irqrestore(&pdata->dyn_callback_lock, 133 flags); 134 return callback->usage_callback; 135 } 136 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 137 138 return NULL; 139 } 140 141 int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, 142 u32 usage_id, 143 struct hid_sensor_hub_callbacks *usage_callback) 144 { 145 struct hid_sensor_hub_callbacks_list *callback; 146 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 147 unsigned long flags; 148 149 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 150 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 151 if (callback->usage_id == usage_id && 152 callback->hsdev == hsdev) { 153 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 154 return -EINVAL; 155 } 156 callback = kzalloc(sizeof(*callback), GFP_ATOMIC); 157 if (!callback) { 158 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 159 return -ENOMEM; 160 } 161 callback->hsdev = hsdev; 162 callback->usage_callback = usage_callback; 163 callback->usage_id = usage_id; 164 callback->priv = NULL; 165 /* 166 * If there is a handler registered for the collection type, then 167 * it will handle all reports for sensors in this collection. If 168 * there is also an individual sensor handler registration, then 169 * we want to make sure that the reports are directed to collection 170 * handler, as this may be a fusion sensor. So add collection handlers 171 * to the beginning of the list, so that they are matched first. 172 */ 173 if (usage_id == HID_USAGE_SENSOR_COLLECTION) 174 list_add(&callback->list, &pdata->dyn_callback_list); 175 else 176 list_add_tail(&callback->list, &pdata->dyn_callback_list); 177 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 178 179 return 0; 180 } 181 EXPORT_SYMBOL_GPL(sensor_hub_register_callback); 182 183 int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, 184 u32 usage_id) 185 { 186 struct hid_sensor_hub_callbacks_list *callback; 187 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 188 unsigned long flags; 189 190 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 191 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 192 if (callback->usage_id == usage_id && 193 callback->hsdev == hsdev) { 194 list_del(&callback->list); 195 kfree(callback); 196 break; 197 } 198 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 199 200 return 0; 201 } 202 EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); 203 204 int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 205 u32 field_index, int buffer_size, void *buffer) 206 { 207 struct hid_report *report; 208 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 209 __s32 *buf32 = buffer; 210 int i = 0; 211 int remaining_bytes; 212 __s32 value; 213 int ret = 0; 214 215 mutex_lock(&data->mutex); 216 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 217 if (!report || (field_index >= report->maxfield)) { 218 ret = -EINVAL; 219 goto done_proc; 220 } 221 222 remaining_bytes = buffer_size % sizeof(__s32); 223 buffer_size = buffer_size / sizeof(__s32); 224 if (buffer_size) { 225 for (i = 0; i < buffer_size; ++i) { 226 hid_set_field(report->field[field_index], i, 227 (__force __s32)cpu_to_le32(*buf32)); 228 ++buf32; 229 } 230 } 231 if (remaining_bytes) { 232 value = 0; 233 memcpy(&value, (u8 *)buf32, remaining_bytes); 234 hid_set_field(report->field[field_index], i, 235 (__force __s32)cpu_to_le32(value)); 236 } 237 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); 238 hid_hw_wait(hsdev->hdev); 239 240 done_proc: 241 mutex_unlock(&data->mutex); 242 243 return ret; 244 } 245 EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 246 247 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 248 u32 field_index, int buffer_size, void *buffer) 249 { 250 struct hid_report *report; 251 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 252 int report_size; 253 int ret = 0; 254 u8 *val_ptr; 255 int buffer_index = 0; 256 int i; 257 258 memset(buffer, 0, buffer_size); 259 260 mutex_lock(&data->mutex); 261 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 262 if (!report || (field_index >= report->maxfield) || 263 report->field[field_index]->report_count < 1) { 264 ret = -EINVAL; 265 goto done_proc; 266 } 267 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 268 hid_hw_wait(hsdev->hdev); 269 270 /* calculate number of bytes required to read this field */ 271 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 272 8) * 273 report->field[field_index]->report_count; 274 if (!report_size) { 275 ret = -EINVAL; 276 goto done_proc; 277 } 278 ret = min(report_size, buffer_size); 279 280 val_ptr = (u8 *)report->field[field_index]->value; 281 for (i = 0; i < report->field[field_index]->report_count; ++i) { 282 if (buffer_index >= ret) 283 break; 284 285 memcpy(&((u8 *)buffer)[buffer_index], val_ptr, 286 report->field[field_index]->report_size / 8); 287 val_ptr += sizeof(__s32); 288 buffer_index += (report->field[field_index]->report_size / 8); 289 } 290 291 done_proc: 292 mutex_unlock(&data->mutex); 293 294 return ret; 295 } 296 EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 297 298 299 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 300 u32 usage_id, 301 u32 attr_usage_id, u32 report_id, 302 enum sensor_hub_read_flags flag) 303 { 304 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 305 unsigned long flags; 306 struct hid_report *report; 307 int ret_val = 0; 308 309 report = sensor_hub_report(report_id, hsdev->hdev, 310 HID_INPUT_REPORT); 311 if (!report) 312 return -EINVAL; 313 314 mutex_lock(hsdev->mutex_ptr); 315 if (flag == SENSOR_HUB_SYNC) { 316 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 317 init_completion(&hsdev->pending.ready); 318 hsdev->pending.usage_id = usage_id; 319 hsdev->pending.attr_usage_id = attr_usage_id; 320 hsdev->pending.raw_size = 0; 321 322 spin_lock_irqsave(&data->lock, flags); 323 hsdev->pending.status = true; 324 spin_unlock_irqrestore(&data->lock, flags); 325 } 326 mutex_lock(&data->mutex); 327 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 328 mutex_unlock(&data->mutex); 329 if (flag == SENSOR_HUB_SYNC) { 330 wait_for_completion_interruptible_timeout( 331 &hsdev->pending.ready, HZ*5); 332 switch (hsdev->pending.raw_size) { 333 case 1: 334 ret_val = *(u8 *)hsdev->pending.raw_data; 335 break; 336 case 2: 337 ret_val = *(u16 *)hsdev->pending.raw_data; 338 break; 339 case 4: 340 ret_val = *(u32 *)hsdev->pending.raw_data; 341 break; 342 default: 343 ret_val = 0; 344 } 345 kfree(hsdev->pending.raw_data); 346 hsdev->pending.status = false; 347 } 348 mutex_unlock(hsdev->mutex_ptr); 349 350 return ret_val; 351 } 352 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 353 354 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 355 u32 report_id, int field_index, u32 usage_id) 356 { 357 struct hid_report *report; 358 struct hid_field *field; 359 int i; 360 361 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 362 if (!report || (field_index >= report->maxfield)) 363 goto done_proc; 364 365 field = report->field[field_index]; 366 for (i = 0; i < field->maxusage; ++i) { 367 if (field->usage[i].hid == usage_id) 368 return field->usage[i].usage_index; 369 } 370 371 done_proc: 372 return -EINVAL; 373 } 374 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 375 376 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 377 u8 type, 378 u32 usage_id, 379 u32 attr_usage_id, 380 struct hid_sensor_hub_attribute_info *info) 381 { 382 int ret = -1; 383 int i; 384 struct hid_report *report; 385 struct hid_field *field; 386 struct hid_report_enum *report_enum; 387 struct hid_device *hdev = hsdev->hdev; 388 389 /* Initialize with defaults */ 390 info->usage_id = usage_id; 391 info->attrib_id = attr_usage_id; 392 info->report_id = -1; 393 info->index = -1; 394 info->units = -1; 395 info->unit_expo = -1; 396 397 report_enum = &hdev->report_enum[type]; 398 list_for_each_entry(report, &report_enum->report_list, list) { 399 for (i = 0; i < report->maxfield; ++i) { 400 field = report->field[i]; 401 if (field->maxusage) { 402 if (field->physical == usage_id && 403 (field->logical == attr_usage_id || 404 field->usage[0].hid == 405 attr_usage_id) && 406 (field->usage[0].collection_index >= 407 hsdev->start_collection_index) && 408 (field->usage[0].collection_index < 409 hsdev->end_collection_index)) { 410 411 sensor_hub_fill_attr_info(info, i, 412 report->id, 413 field); 414 ret = 0; 415 break; 416 } 417 } 418 } 419 420 } 421 422 return ret; 423 } 424 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 425 426 #ifdef CONFIG_PM 427 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 428 { 429 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 430 struct hid_sensor_hub_callbacks_list *callback; 431 unsigned long flags; 432 433 hid_dbg(hdev, " sensor_hub_suspend\n"); 434 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 435 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 436 if (callback->usage_callback->suspend) 437 callback->usage_callback->suspend( 438 callback->hsdev, callback->priv); 439 } 440 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 441 442 return 0; 443 } 444 445 static int sensor_hub_resume(struct hid_device *hdev) 446 { 447 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 448 struct hid_sensor_hub_callbacks_list *callback; 449 unsigned long flags; 450 451 hid_dbg(hdev, " sensor_hub_resume\n"); 452 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 453 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 454 if (callback->usage_callback->resume) 455 callback->usage_callback->resume( 456 callback->hsdev, callback->priv); 457 } 458 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 459 460 return 0; 461 } 462 463 static int sensor_hub_reset_resume(struct hid_device *hdev) 464 { 465 return 0; 466 } 467 #endif 468 469 /* 470 * Handle raw report as sent by device 471 */ 472 static int sensor_hub_raw_event(struct hid_device *hdev, 473 struct hid_report *report, u8 *raw_data, int size) 474 { 475 int i; 476 u8 *ptr; 477 int sz; 478 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 479 unsigned long flags; 480 struct hid_sensor_hub_callbacks *callback = NULL; 481 struct hid_collection *collection = NULL; 482 void *priv = NULL; 483 struct hid_sensor_hub_device *hsdev = NULL; 484 485 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 486 report->id, size, report->type); 487 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 488 if (report->type != HID_INPUT_REPORT) 489 return 1; 490 491 ptr = raw_data; 492 ptr++; /* Skip report id */ 493 494 spin_lock_irqsave(&pdata->lock, flags); 495 496 for (i = 0; i < report->maxfield; ++i) { 497 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 498 i, report->field[i]->usage->collection_index, 499 report->field[i]->usage->hid, 500 (report->field[i]->report_size * 501 report->field[i]->report_count)/8); 502 sz = (report->field[i]->report_size * 503 report->field[i]->report_count)/8; 504 collection = &hdev->collection[ 505 report->field[i]->usage->collection_index]; 506 hid_dbg(hdev, "collection->usage %x\n", 507 collection->usage); 508 509 callback = sensor_hub_get_callback(hdev, 510 report->field[i]->physical, 511 report->field[i]->usage[0].collection_index, 512 &hsdev, &priv); 513 if (!callback) { 514 ptr += sz; 515 continue; 516 } 517 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 518 report->field[i]->usage->hid || 519 hsdev->pending.attr_usage_id == 520 report->field[i]->logical)) { 521 hid_dbg(hdev, "data was pending ...\n"); 522 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 523 if (hsdev->pending.raw_data) 524 hsdev->pending.raw_size = sz; 525 else 526 hsdev->pending.raw_size = 0; 527 complete(&hsdev->pending.ready); 528 } 529 if (callback->capture_sample) { 530 if (report->field[i]->logical) 531 callback->capture_sample(hsdev, 532 report->field[i]->logical, sz, ptr, 533 callback->pdev); 534 else 535 callback->capture_sample(hsdev, 536 report->field[i]->usage->hid, sz, ptr, 537 callback->pdev); 538 } 539 ptr += sz; 540 } 541 if (callback && collection && callback->send_event) 542 callback->send_event(hsdev, collection->usage, 543 callback->pdev); 544 spin_unlock_irqrestore(&pdata->lock, flags); 545 546 return 1; 547 } 548 549 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 550 { 551 int ret = 0; 552 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 553 554 mutex_lock(&data->mutex); 555 if (!data->ref_cnt) { 556 ret = hid_hw_open(hsdev->hdev); 557 if (ret) { 558 hid_err(hsdev->hdev, "failed to open hid device\n"); 559 mutex_unlock(&data->mutex); 560 return ret; 561 } 562 } 563 data->ref_cnt++; 564 mutex_unlock(&data->mutex); 565 566 return ret; 567 } 568 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 569 570 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 571 { 572 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 573 574 mutex_lock(&data->mutex); 575 data->ref_cnt--; 576 if (!data->ref_cnt) 577 hid_hw_close(hsdev->hdev); 578 mutex_unlock(&data->mutex); 579 } 580 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 581 582 static int sensor_hub_probe(struct hid_device *hdev, 583 const struct hid_device_id *id) 584 { 585 int ret; 586 struct sensor_hub_data *sd; 587 int i; 588 char *name; 589 int dev_cnt; 590 struct hid_sensor_hub_device *hsdev; 591 struct hid_sensor_hub_device *last_hsdev = NULL; 592 struct hid_sensor_hub_device *collection_hsdev = NULL; 593 594 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 595 if (!sd) { 596 hid_err(hdev, "cannot allocate Sensor data\n"); 597 return -ENOMEM; 598 } 599 600 hid_set_drvdata(hdev, sd); 601 sd->quirks = id->driver_data; 602 603 spin_lock_init(&sd->lock); 604 spin_lock_init(&sd->dyn_callback_lock); 605 mutex_init(&sd->mutex); 606 ret = hid_parse(hdev); 607 if (ret) { 608 hid_err(hdev, "parse failed\n"); 609 return ret; 610 } 611 INIT_LIST_HEAD(&hdev->inputs); 612 613 ret = hid_hw_start(hdev, 0); 614 if (ret) { 615 hid_err(hdev, "hw start failed\n"); 616 return ret; 617 } 618 INIT_LIST_HEAD(&sd->dyn_callback_list); 619 sd->hid_sensor_client_cnt = 0; 620 621 dev_cnt = sensor_hub_get_physical_device_count(hdev); 622 if (dev_cnt > HID_MAX_PHY_DEVICES) { 623 hid_err(hdev, "Invalid Physical device count\n"); 624 ret = -EINVAL; 625 goto err_stop_hw; 626 } 627 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 628 dev_cnt, 629 sizeof(struct mfd_cell), 630 GFP_KERNEL); 631 if (sd->hid_sensor_hub_client_devs == NULL) { 632 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 633 ret = -ENOMEM; 634 goto err_stop_hw; 635 } 636 637 for (i = 0; i < hdev->maxcollection; ++i) { 638 struct hid_collection *collection = &hdev->collection[i]; 639 640 if (collection->type == HID_COLLECTION_PHYSICAL || 641 collection->type == HID_COLLECTION_APPLICATION) { 642 643 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 644 GFP_KERNEL); 645 if (!hsdev) { 646 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 647 ret = -ENOMEM; 648 goto err_stop_hw; 649 } 650 hsdev->hdev = hdev; 651 hsdev->vendor_id = hdev->vendor; 652 hsdev->product_id = hdev->product; 653 hsdev->usage = collection->usage; 654 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 655 sizeof(struct mutex), 656 GFP_KERNEL); 657 if (!hsdev->mutex_ptr) { 658 ret = -ENOMEM; 659 goto err_stop_hw; 660 } 661 mutex_init(hsdev->mutex_ptr); 662 hsdev->start_collection_index = i; 663 if (last_hsdev) 664 last_hsdev->end_collection_index = i; 665 last_hsdev = hsdev; 666 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 667 "HID-SENSOR-%x", 668 collection->usage); 669 if (name == NULL) { 670 hid_err(hdev, "Failed MFD device name\n"); 671 ret = -ENOMEM; 672 goto err_stop_hw; 673 } 674 sd->hid_sensor_hub_client_devs[ 675 sd->hid_sensor_client_cnt].name = name; 676 sd->hid_sensor_hub_client_devs[ 677 sd->hid_sensor_client_cnt].platform_data = 678 hsdev; 679 sd->hid_sensor_hub_client_devs[ 680 sd->hid_sensor_client_cnt].pdata_size = 681 sizeof(*hsdev); 682 hid_dbg(hdev, "Adding %s:%d\n", name, 683 hsdev->start_collection_index); 684 sd->hid_sensor_client_cnt++; 685 if (collection_hsdev) 686 collection_hsdev->end_collection_index = i; 687 if (collection->type == HID_COLLECTION_APPLICATION && 688 collection->usage == HID_USAGE_SENSOR_COLLECTION) 689 collection_hsdev = hsdev; 690 } 691 } 692 if (last_hsdev) 693 last_hsdev->end_collection_index = i; 694 if (collection_hsdev) 695 collection_hsdev->end_collection_index = i; 696 697 ret = mfd_add_hotplug_devices(&hdev->dev, 698 sd->hid_sensor_hub_client_devs, 699 sd->hid_sensor_client_cnt); 700 if (ret < 0) 701 goto err_stop_hw; 702 703 return ret; 704 705 err_stop_hw: 706 hid_hw_stop(hdev); 707 708 return ret; 709 } 710 711 static void sensor_hub_remove(struct hid_device *hdev) 712 { 713 struct sensor_hub_data *data = hid_get_drvdata(hdev); 714 unsigned long flags; 715 int i; 716 717 hid_dbg(hdev, " hardware removed\n"); 718 hid_hw_close(hdev); 719 hid_hw_stop(hdev); 720 spin_lock_irqsave(&data->lock, flags); 721 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 722 struct hid_sensor_hub_device *hsdev = 723 data->hid_sensor_hub_client_devs[i].platform_data; 724 if (hsdev->pending.status) 725 complete(&hsdev->pending.ready); 726 } 727 spin_unlock_irqrestore(&data->lock, flags); 728 mfd_remove_devices(&hdev->dev); 729 hid_set_drvdata(hdev, NULL); 730 mutex_destroy(&data->mutex); 731 } 732 733 static const struct hid_device_id sensor_hub_devices[] = { 734 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 735 HID_ANY_ID) }, 736 { } 737 }; 738 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 739 740 static struct hid_driver sensor_hub_driver = { 741 .name = "hid-sensor-hub", 742 .id_table = sensor_hub_devices, 743 .probe = sensor_hub_probe, 744 .remove = sensor_hub_remove, 745 .raw_event = sensor_hub_raw_event, 746 #ifdef CONFIG_PM 747 .suspend = sensor_hub_suspend, 748 .resume = sensor_hub_resume, 749 .reset_resume = sensor_hub_reset_resume, 750 #endif 751 }; 752 module_hid_driver(sensor_hub_driver); 753 754 MODULE_DESCRIPTION("HID Sensor Hub driver"); 755 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 756 MODULE_LICENSE("GPL"); 757