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 bool is_signed) 304 { 305 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 306 unsigned long flags; 307 struct hid_report *report; 308 int ret_val = 0; 309 310 report = sensor_hub_report(report_id, hsdev->hdev, 311 HID_INPUT_REPORT); 312 if (!report) 313 return -EINVAL; 314 315 mutex_lock(hsdev->mutex_ptr); 316 if (flag == SENSOR_HUB_SYNC) { 317 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 318 init_completion(&hsdev->pending.ready); 319 hsdev->pending.usage_id = usage_id; 320 hsdev->pending.attr_usage_id = attr_usage_id; 321 hsdev->pending.raw_size = 0; 322 323 spin_lock_irqsave(&data->lock, flags); 324 hsdev->pending.status = true; 325 spin_unlock_irqrestore(&data->lock, flags); 326 } 327 mutex_lock(&data->mutex); 328 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 329 mutex_unlock(&data->mutex); 330 if (flag == SENSOR_HUB_SYNC) { 331 wait_for_completion_interruptible_timeout( 332 &hsdev->pending.ready, HZ*5); 333 switch (hsdev->pending.raw_size) { 334 case 1: 335 if (is_signed) 336 ret_val = *(s8 *)hsdev->pending.raw_data; 337 else 338 ret_val = *(u8 *)hsdev->pending.raw_data; 339 break; 340 case 2: 341 if (is_signed) 342 ret_val = *(s16 *)hsdev->pending.raw_data; 343 else 344 ret_val = *(u16 *)hsdev->pending.raw_data; 345 break; 346 case 4: 347 ret_val = *(u32 *)hsdev->pending.raw_data; 348 break; 349 default: 350 ret_val = 0; 351 } 352 kfree(hsdev->pending.raw_data); 353 hsdev->pending.status = false; 354 } 355 mutex_unlock(hsdev->mutex_ptr); 356 357 return ret_val; 358 } 359 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 360 361 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 362 u32 report_id, int field_index, u32 usage_id) 363 { 364 struct hid_report *report; 365 struct hid_field *field; 366 int i; 367 368 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 369 if (!report || (field_index >= report->maxfield)) 370 goto done_proc; 371 372 field = report->field[field_index]; 373 for (i = 0; i < field->maxusage; ++i) { 374 if (field->usage[i].hid == usage_id) 375 return field->usage[i].usage_index; 376 } 377 378 done_proc: 379 return -EINVAL; 380 } 381 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 382 383 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 384 u8 type, 385 u32 usage_id, 386 u32 attr_usage_id, 387 struct hid_sensor_hub_attribute_info *info) 388 { 389 int ret = -1; 390 int i; 391 struct hid_report *report; 392 struct hid_field *field; 393 struct hid_report_enum *report_enum; 394 struct hid_device *hdev = hsdev->hdev; 395 396 /* Initialize with defaults */ 397 info->usage_id = usage_id; 398 info->attrib_id = attr_usage_id; 399 info->report_id = -1; 400 info->index = -1; 401 info->units = -1; 402 info->unit_expo = -1; 403 404 report_enum = &hdev->report_enum[type]; 405 list_for_each_entry(report, &report_enum->report_list, list) { 406 for (i = 0; i < report->maxfield; ++i) { 407 field = report->field[i]; 408 if (field->maxusage) { 409 if (field->physical == usage_id && 410 (field->logical == attr_usage_id || 411 field->usage[0].hid == 412 attr_usage_id) && 413 (field->usage[0].collection_index >= 414 hsdev->start_collection_index) && 415 (field->usage[0].collection_index < 416 hsdev->end_collection_index)) { 417 418 sensor_hub_fill_attr_info(info, i, 419 report->id, 420 field); 421 ret = 0; 422 break; 423 } 424 } 425 } 426 427 } 428 429 return ret; 430 } 431 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 432 433 #ifdef CONFIG_PM 434 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 435 { 436 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 437 struct hid_sensor_hub_callbacks_list *callback; 438 unsigned long flags; 439 440 hid_dbg(hdev, " sensor_hub_suspend\n"); 441 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 442 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 443 if (callback->usage_callback->suspend) 444 callback->usage_callback->suspend( 445 callback->hsdev, callback->priv); 446 } 447 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 448 449 return 0; 450 } 451 452 static int sensor_hub_resume(struct hid_device *hdev) 453 { 454 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 455 struct hid_sensor_hub_callbacks_list *callback; 456 unsigned long flags; 457 458 hid_dbg(hdev, " sensor_hub_resume\n"); 459 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 460 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 461 if (callback->usage_callback->resume) 462 callback->usage_callback->resume( 463 callback->hsdev, callback->priv); 464 } 465 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 466 467 return 0; 468 } 469 470 static int sensor_hub_reset_resume(struct hid_device *hdev) 471 { 472 return 0; 473 } 474 #endif 475 476 /* 477 * Handle raw report as sent by device 478 */ 479 static int sensor_hub_raw_event(struct hid_device *hdev, 480 struct hid_report *report, u8 *raw_data, int size) 481 { 482 int i; 483 u8 *ptr; 484 int sz; 485 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 486 unsigned long flags; 487 struct hid_sensor_hub_callbacks *callback = NULL; 488 struct hid_collection *collection = NULL; 489 void *priv = NULL; 490 struct hid_sensor_hub_device *hsdev = NULL; 491 492 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 493 report->id, size, report->type); 494 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 495 if (report->type != HID_INPUT_REPORT) 496 return 1; 497 498 ptr = raw_data; 499 ptr++; /* Skip report id */ 500 501 spin_lock_irqsave(&pdata->lock, flags); 502 503 for (i = 0; i < report->maxfield; ++i) { 504 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 505 i, report->field[i]->usage->collection_index, 506 report->field[i]->usage->hid, 507 (report->field[i]->report_size * 508 report->field[i]->report_count)/8); 509 sz = (report->field[i]->report_size * 510 report->field[i]->report_count)/8; 511 collection = &hdev->collection[ 512 report->field[i]->usage->collection_index]; 513 hid_dbg(hdev, "collection->usage %x\n", 514 collection->usage); 515 516 callback = sensor_hub_get_callback(hdev, 517 report->field[i]->physical, 518 report->field[i]->usage[0].collection_index, 519 &hsdev, &priv); 520 if (!callback) { 521 ptr += sz; 522 continue; 523 } 524 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 525 report->field[i]->usage->hid || 526 hsdev->pending.attr_usage_id == 527 report->field[i]->logical)) { 528 hid_dbg(hdev, "data was pending ...\n"); 529 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 530 if (hsdev->pending.raw_data) 531 hsdev->pending.raw_size = sz; 532 else 533 hsdev->pending.raw_size = 0; 534 complete(&hsdev->pending.ready); 535 } 536 if (callback->capture_sample) { 537 if (report->field[i]->logical) 538 callback->capture_sample(hsdev, 539 report->field[i]->logical, sz, ptr, 540 callback->pdev); 541 else 542 callback->capture_sample(hsdev, 543 report->field[i]->usage->hid, sz, ptr, 544 callback->pdev); 545 } 546 ptr += sz; 547 } 548 if (callback && collection && callback->send_event) 549 callback->send_event(hsdev, collection->usage, 550 callback->pdev); 551 spin_unlock_irqrestore(&pdata->lock, flags); 552 553 return 1; 554 } 555 556 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 557 { 558 int ret = 0; 559 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 560 561 mutex_lock(&data->mutex); 562 if (!data->ref_cnt) { 563 ret = hid_hw_open(hsdev->hdev); 564 if (ret) { 565 hid_err(hsdev->hdev, "failed to open hid device\n"); 566 mutex_unlock(&data->mutex); 567 return ret; 568 } 569 } 570 data->ref_cnt++; 571 mutex_unlock(&data->mutex); 572 573 return ret; 574 } 575 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 576 577 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 578 { 579 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 580 581 mutex_lock(&data->mutex); 582 data->ref_cnt--; 583 if (!data->ref_cnt) 584 hid_hw_close(hsdev->hdev); 585 mutex_unlock(&data->mutex); 586 } 587 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 588 589 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 590 unsigned int *rsize) 591 { 592 /* 593 * Checks if the report descriptor of Thinkpad Helix 2 has a logical 594 * minimum for magnetic flux axis greater than the maximum. 595 */ 596 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 597 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 598 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 599 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 600 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 601 /* Sets negative logical minimum for mag x, y and z */ 602 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 603 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 604 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 605 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 606 } 607 608 return rdesc; 609 } 610 611 static int sensor_hub_probe(struct hid_device *hdev, 612 const struct hid_device_id *id) 613 { 614 int ret; 615 struct sensor_hub_data *sd; 616 int i; 617 char *name; 618 int dev_cnt; 619 struct hid_sensor_hub_device *hsdev; 620 struct hid_sensor_hub_device *last_hsdev = NULL; 621 struct hid_sensor_hub_device *collection_hsdev = NULL; 622 623 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 624 if (!sd) { 625 hid_err(hdev, "cannot allocate Sensor data\n"); 626 return -ENOMEM; 627 } 628 629 hid_set_drvdata(hdev, sd); 630 sd->quirks = id->driver_data; 631 632 spin_lock_init(&sd->lock); 633 spin_lock_init(&sd->dyn_callback_lock); 634 mutex_init(&sd->mutex); 635 ret = hid_parse(hdev); 636 if (ret) { 637 hid_err(hdev, "parse failed\n"); 638 return ret; 639 } 640 INIT_LIST_HEAD(&hdev->inputs); 641 642 ret = hid_hw_start(hdev, 0); 643 if (ret) { 644 hid_err(hdev, "hw start failed\n"); 645 return ret; 646 } 647 INIT_LIST_HEAD(&sd->dyn_callback_list); 648 sd->hid_sensor_client_cnt = 0; 649 650 dev_cnt = sensor_hub_get_physical_device_count(hdev); 651 if (dev_cnt > HID_MAX_PHY_DEVICES) { 652 hid_err(hdev, "Invalid Physical device count\n"); 653 ret = -EINVAL; 654 goto err_stop_hw; 655 } 656 sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev, 657 dev_cnt, 658 sizeof(struct mfd_cell), 659 GFP_KERNEL); 660 if (sd->hid_sensor_hub_client_devs == NULL) { 661 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 662 ret = -ENOMEM; 663 goto err_stop_hw; 664 } 665 666 for (i = 0; i < hdev->maxcollection; ++i) { 667 struct hid_collection *collection = &hdev->collection[i]; 668 669 if (collection->type == HID_COLLECTION_PHYSICAL || 670 collection->type == HID_COLLECTION_APPLICATION) { 671 672 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 673 GFP_KERNEL); 674 if (!hsdev) { 675 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 676 ret = -ENOMEM; 677 goto err_stop_hw; 678 } 679 hsdev->hdev = hdev; 680 hsdev->vendor_id = hdev->vendor; 681 hsdev->product_id = hdev->product; 682 hsdev->usage = collection->usage; 683 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 684 sizeof(struct mutex), 685 GFP_KERNEL); 686 if (!hsdev->mutex_ptr) { 687 ret = -ENOMEM; 688 goto err_stop_hw; 689 } 690 mutex_init(hsdev->mutex_ptr); 691 hsdev->start_collection_index = i; 692 if (last_hsdev) 693 last_hsdev->end_collection_index = i; 694 last_hsdev = hsdev; 695 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 696 "HID-SENSOR-%x", 697 collection->usage); 698 if (name == NULL) { 699 hid_err(hdev, "Failed MFD device name\n"); 700 ret = -ENOMEM; 701 goto err_stop_hw; 702 } 703 sd->hid_sensor_hub_client_devs[ 704 sd->hid_sensor_client_cnt].name = name; 705 sd->hid_sensor_hub_client_devs[ 706 sd->hid_sensor_client_cnt].platform_data = 707 hsdev; 708 sd->hid_sensor_hub_client_devs[ 709 sd->hid_sensor_client_cnt].pdata_size = 710 sizeof(*hsdev); 711 hid_dbg(hdev, "Adding %s:%d\n", name, 712 hsdev->start_collection_index); 713 sd->hid_sensor_client_cnt++; 714 if (collection_hsdev) 715 collection_hsdev->end_collection_index = i; 716 if (collection->type == HID_COLLECTION_APPLICATION && 717 collection->usage == HID_USAGE_SENSOR_COLLECTION) 718 collection_hsdev = hsdev; 719 } 720 } 721 if (last_hsdev) 722 last_hsdev->end_collection_index = i; 723 if (collection_hsdev) 724 collection_hsdev->end_collection_index = i; 725 726 ret = mfd_add_hotplug_devices(&hdev->dev, 727 sd->hid_sensor_hub_client_devs, 728 sd->hid_sensor_client_cnt); 729 if (ret < 0) 730 goto err_stop_hw; 731 732 return ret; 733 734 err_stop_hw: 735 hid_hw_stop(hdev); 736 737 return ret; 738 } 739 740 static void sensor_hub_remove(struct hid_device *hdev) 741 { 742 struct sensor_hub_data *data = hid_get_drvdata(hdev); 743 unsigned long flags; 744 int i; 745 746 hid_dbg(hdev, " hardware removed\n"); 747 hid_hw_close(hdev); 748 hid_hw_stop(hdev); 749 spin_lock_irqsave(&data->lock, flags); 750 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 751 struct hid_sensor_hub_device *hsdev = 752 data->hid_sensor_hub_client_devs[i].platform_data; 753 if (hsdev->pending.status) 754 complete(&hsdev->pending.ready); 755 } 756 spin_unlock_irqrestore(&data->lock, flags); 757 mfd_remove_devices(&hdev->dev); 758 hid_set_drvdata(hdev, NULL); 759 mutex_destroy(&data->mutex); 760 } 761 762 static const struct hid_device_id sensor_hub_devices[] = { 763 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 764 HID_ANY_ID) }, 765 { } 766 }; 767 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 768 769 static struct hid_driver sensor_hub_driver = { 770 .name = "hid-sensor-hub", 771 .id_table = sensor_hub_devices, 772 .probe = sensor_hub_probe, 773 .remove = sensor_hub_remove, 774 .raw_event = sensor_hub_raw_event, 775 .report_fixup = sensor_hub_report_fixup, 776 #ifdef CONFIG_PM 777 .suspend = sensor_hub_suspend, 778 .resume = sensor_hub_resume, 779 .reset_resume = sensor_hub_reset_resume, 780 #endif 781 }; 782 module_hid_driver(sensor_hub_driver); 783 784 MODULE_DESCRIPTION("HID Sensor Hub driver"); 785 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 786 MODULE_LICENSE("GPL"); 787