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; 254 255 mutex_lock(&data->mutex); 256 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 257 if (!report || (field_index >= report->maxfield) || 258 report->field[field_index]->report_count < 1) { 259 ret = -EINVAL; 260 goto done_proc; 261 } 262 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 263 hid_hw_wait(hsdev->hdev); 264 265 /* calculate number of bytes required to read this field */ 266 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 267 8) * 268 report->field[field_index]->report_count; 269 if (!report_size) { 270 ret = -EINVAL; 271 goto done_proc; 272 } 273 ret = min(report_size, buffer_size); 274 memcpy(buffer, report->field[field_index]->value, ret); 275 276 done_proc: 277 mutex_unlock(&data->mutex); 278 279 return ret; 280 } 281 EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 282 283 284 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 285 u32 usage_id, 286 u32 attr_usage_id, u32 report_id, 287 enum sensor_hub_read_flags flag) 288 { 289 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 290 unsigned long flags; 291 struct hid_report *report; 292 int ret_val = 0; 293 294 report = sensor_hub_report(report_id, hsdev->hdev, 295 HID_INPUT_REPORT); 296 if (!report) 297 return -EINVAL; 298 299 mutex_lock(hsdev->mutex_ptr); 300 if (flag == SENSOR_HUB_SYNC) { 301 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 302 init_completion(&hsdev->pending.ready); 303 hsdev->pending.usage_id = usage_id; 304 hsdev->pending.attr_usage_id = attr_usage_id; 305 hsdev->pending.raw_size = 0; 306 307 spin_lock_irqsave(&data->lock, flags); 308 hsdev->pending.status = true; 309 spin_unlock_irqrestore(&data->lock, flags); 310 } 311 mutex_lock(&data->mutex); 312 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 313 mutex_unlock(&data->mutex); 314 if (flag == SENSOR_HUB_SYNC) { 315 wait_for_completion_interruptible_timeout( 316 &hsdev->pending.ready, HZ*5); 317 switch (hsdev->pending.raw_size) { 318 case 1: 319 ret_val = *(u8 *)hsdev->pending.raw_data; 320 break; 321 case 2: 322 ret_val = *(u16 *)hsdev->pending.raw_data; 323 break; 324 case 4: 325 ret_val = *(u32 *)hsdev->pending.raw_data; 326 break; 327 default: 328 ret_val = 0; 329 } 330 kfree(hsdev->pending.raw_data); 331 hsdev->pending.status = false; 332 } 333 mutex_unlock(hsdev->mutex_ptr); 334 335 return ret_val; 336 } 337 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 338 339 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 340 u32 report_id, int field_index, u32 usage_id) 341 { 342 struct hid_report *report; 343 struct hid_field *field; 344 int i; 345 346 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 347 if (!report || (field_index >= report->maxfield)) 348 goto done_proc; 349 350 field = report->field[field_index]; 351 for (i = 0; i < field->maxusage; ++i) { 352 if (field->usage[i].hid == usage_id) 353 return field->usage[i].usage_index; 354 } 355 356 done_proc: 357 return -EINVAL; 358 } 359 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 360 361 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 362 u8 type, 363 u32 usage_id, 364 u32 attr_usage_id, 365 struct hid_sensor_hub_attribute_info *info) 366 { 367 int ret = -1; 368 int i; 369 struct hid_report *report; 370 struct hid_field *field; 371 struct hid_report_enum *report_enum; 372 struct hid_device *hdev = hsdev->hdev; 373 374 /* Initialize with defaults */ 375 info->usage_id = usage_id; 376 info->attrib_id = attr_usage_id; 377 info->report_id = -1; 378 info->index = -1; 379 info->units = -1; 380 info->unit_expo = -1; 381 382 report_enum = &hdev->report_enum[type]; 383 list_for_each_entry(report, &report_enum->report_list, list) { 384 for (i = 0; i < report->maxfield; ++i) { 385 field = report->field[i]; 386 if (field->maxusage) { 387 if (field->physical == usage_id && 388 (field->logical == attr_usage_id || 389 field->usage[0].hid == 390 attr_usage_id) && 391 (field->usage[0].collection_index >= 392 hsdev->start_collection_index) && 393 (field->usage[0].collection_index < 394 hsdev->end_collection_index)) { 395 396 sensor_hub_fill_attr_info(info, i, 397 report->id, 398 field); 399 ret = 0; 400 break; 401 } 402 } 403 } 404 405 } 406 407 return ret; 408 } 409 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 410 411 #ifdef CONFIG_PM 412 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 413 { 414 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 415 struct hid_sensor_hub_callbacks_list *callback; 416 unsigned long flags; 417 418 hid_dbg(hdev, " sensor_hub_suspend\n"); 419 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 420 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 421 if (callback->usage_callback->suspend) 422 callback->usage_callback->suspend( 423 callback->hsdev, callback->priv); 424 } 425 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 426 427 return 0; 428 } 429 430 static int sensor_hub_resume(struct hid_device *hdev) 431 { 432 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 433 struct hid_sensor_hub_callbacks_list *callback; 434 unsigned long flags; 435 436 hid_dbg(hdev, " sensor_hub_resume\n"); 437 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 438 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 439 if (callback->usage_callback->resume) 440 callback->usage_callback->resume( 441 callback->hsdev, callback->priv); 442 } 443 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 444 445 return 0; 446 } 447 448 static int sensor_hub_reset_resume(struct hid_device *hdev) 449 { 450 return 0; 451 } 452 #endif 453 454 /* 455 * Handle raw report as sent by device 456 */ 457 static int sensor_hub_raw_event(struct hid_device *hdev, 458 struct hid_report *report, u8 *raw_data, int size) 459 { 460 int i; 461 u8 *ptr; 462 int sz; 463 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 464 unsigned long flags; 465 struct hid_sensor_hub_callbacks *callback = NULL; 466 struct hid_collection *collection = NULL; 467 void *priv = NULL; 468 struct hid_sensor_hub_device *hsdev = NULL; 469 470 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 471 report->id, size, report->type); 472 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 473 if (report->type != HID_INPUT_REPORT) 474 return 1; 475 476 ptr = raw_data; 477 ptr++; /* Skip report id */ 478 479 spin_lock_irqsave(&pdata->lock, flags); 480 481 for (i = 0; i < report->maxfield; ++i) { 482 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 483 i, report->field[i]->usage->collection_index, 484 report->field[i]->usage->hid, 485 (report->field[i]->report_size * 486 report->field[i]->report_count)/8); 487 sz = (report->field[i]->report_size * 488 report->field[i]->report_count)/8; 489 collection = &hdev->collection[ 490 report->field[i]->usage->collection_index]; 491 hid_dbg(hdev, "collection->usage %x\n", 492 collection->usage); 493 494 callback = sensor_hub_get_callback(hdev, 495 report->field[i]->physical, 496 report->field[i]->usage[0].collection_index, 497 &hsdev, &priv); 498 if (!callback) { 499 ptr += sz; 500 continue; 501 } 502 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 503 report->field[i]->usage->hid || 504 hsdev->pending.attr_usage_id == 505 report->field[i]->logical)) { 506 hid_dbg(hdev, "data was pending ...\n"); 507 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 508 if (hsdev->pending.raw_data) 509 hsdev->pending.raw_size = sz; 510 else 511 hsdev->pending.raw_size = 0; 512 complete(&hsdev->pending.ready); 513 } 514 if (callback->capture_sample) { 515 if (report->field[i]->logical) 516 callback->capture_sample(hsdev, 517 report->field[i]->logical, sz, ptr, 518 callback->pdev); 519 else 520 callback->capture_sample(hsdev, 521 report->field[i]->usage->hid, sz, ptr, 522 callback->pdev); 523 } 524 ptr += sz; 525 } 526 if (callback && collection && callback->send_event) 527 callback->send_event(hsdev, collection->usage, 528 callback->pdev); 529 spin_unlock_irqrestore(&pdata->lock, flags); 530 531 return 1; 532 } 533 534 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 535 { 536 int ret = 0; 537 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 538 539 mutex_lock(&data->mutex); 540 if (!data->ref_cnt) { 541 ret = hid_hw_open(hsdev->hdev); 542 if (ret) { 543 hid_err(hsdev->hdev, "failed to open hid device\n"); 544 mutex_unlock(&data->mutex); 545 return ret; 546 } 547 } 548 data->ref_cnt++; 549 mutex_unlock(&data->mutex); 550 551 return ret; 552 } 553 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 554 555 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 556 { 557 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 558 559 mutex_lock(&data->mutex); 560 data->ref_cnt--; 561 if (!data->ref_cnt) 562 hid_hw_close(hsdev->hdev); 563 mutex_unlock(&data->mutex); 564 } 565 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 566 567 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 568 unsigned int *rsize) 569 { 570 int index; 571 struct sensor_hub_data *sd = hid_get_drvdata(hdev); 572 unsigned char report_block[] = { 573 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05}; 574 unsigned char power_block[] = { 575 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05}; 576 577 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) { 578 hid_dbg(hdev, "No Enum quirks\n"); 579 return rdesc; 580 } 581 582 /* Looks for power and report state usage id and force to 1 */ 583 for (index = 0; index < *rsize; ++index) { 584 if (((*rsize - index) > sizeof(report_block)) && 585 !memcmp(&rdesc[index], report_block, 586 sizeof(report_block))) { 587 rdesc[index + 4] = 0x01; 588 index += sizeof(report_block); 589 } 590 if (((*rsize - index) > sizeof(power_block)) && 591 !memcmp(&rdesc[index], power_block, 592 sizeof(power_block))) { 593 rdesc[index + 4] = 0x01; 594 index += sizeof(power_block); 595 } 596 } 597 598 /* Checks if the report descriptor of Thinkpad Helix 2 has a logical 599 * minimum for magnetic flux axis greater than the maximum */ 600 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 601 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 602 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 603 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 604 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 605 /* Sets negative logical minimum for mag x, y and z */ 606 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 607 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 608 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 609 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 610 } 611 612 return rdesc; 613 } 614 615 static int sensor_hub_probe(struct hid_device *hdev, 616 const struct hid_device_id *id) 617 { 618 int ret; 619 struct sensor_hub_data *sd; 620 int i; 621 char *name; 622 int dev_cnt; 623 struct hid_sensor_hub_device *hsdev; 624 struct hid_sensor_hub_device *last_hsdev = NULL; 625 struct hid_sensor_hub_device *collection_hsdev = NULL; 626 627 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 628 if (!sd) { 629 hid_err(hdev, "cannot allocate Sensor data\n"); 630 return -ENOMEM; 631 } 632 633 hid_set_drvdata(hdev, sd); 634 sd->quirks = id->driver_data; 635 636 spin_lock_init(&sd->lock); 637 spin_lock_init(&sd->dyn_callback_lock); 638 mutex_init(&sd->mutex); 639 ret = hid_parse(hdev); 640 if (ret) { 641 hid_err(hdev, "parse failed\n"); 642 return ret; 643 } 644 INIT_LIST_HEAD(&hdev->inputs); 645 646 ret = hid_hw_start(hdev, 0); 647 if (ret) { 648 hid_err(hdev, "hw start failed\n"); 649 return ret; 650 } 651 INIT_LIST_HEAD(&sd->dyn_callback_list); 652 sd->hid_sensor_client_cnt = 0; 653 654 dev_cnt = sensor_hub_get_physical_device_count(hdev); 655 if (dev_cnt > HID_MAX_PHY_DEVICES) { 656 hid_err(hdev, "Invalid Physical device count\n"); 657 ret = -EINVAL; 658 goto err_stop_hw; 659 } 660 sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt * 661 sizeof(struct mfd_cell), 662 GFP_KERNEL); 663 if (sd->hid_sensor_hub_client_devs == NULL) { 664 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 665 ret = -ENOMEM; 666 goto err_stop_hw; 667 } 668 669 for (i = 0; i < hdev->maxcollection; ++i) { 670 struct hid_collection *collection = &hdev->collection[i]; 671 672 if (collection->type == HID_COLLECTION_PHYSICAL || 673 collection->type == HID_COLLECTION_APPLICATION) { 674 675 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 676 GFP_KERNEL); 677 if (!hsdev) { 678 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 679 ret = -ENOMEM; 680 goto err_stop_hw; 681 } 682 hsdev->hdev = hdev; 683 hsdev->vendor_id = hdev->vendor; 684 hsdev->product_id = hdev->product; 685 hsdev->usage = collection->usage; 686 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 687 sizeof(struct mutex), 688 GFP_KERNEL); 689 if (!hsdev->mutex_ptr) { 690 ret = -ENOMEM; 691 goto err_stop_hw; 692 } 693 mutex_init(hsdev->mutex_ptr); 694 hsdev->start_collection_index = i; 695 if (last_hsdev) 696 last_hsdev->end_collection_index = i; 697 last_hsdev = hsdev; 698 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 699 "HID-SENSOR-%x", 700 collection->usage); 701 if (name == NULL) { 702 hid_err(hdev, "Failed MFD device name\n"); 703 ret = -ENOMEM; 704 goto err_stop_hw; 705 } 706 sd->hid_sensor_hub_client_devs[ 707 sd->hid_sensor_client_cnt].name = name; 708 sd->hid_sensor_hub_client_devs[ 709 sd->hid_sensor_client_cnt].platform_data = 710 hsdev; 711 sd->hid_sensor_hub_client_devs[ 712 sd->hid_sensor_client_cnt].pdata_size = 713 sizeof(*hsdev); 714 hid_dbg(hdev, "Adding %s:%d\n", name, 715 hsdev->start_collection_index); 716 sd->hid_sensor_client_cnt++; 717 if (collection_hsdev) 718 collection_hsdev->end_collection_index = i; 719 if (collection->type == HID_COLLECTION_APPLICATION && 720 collection->usage == HID_USAGE_SENSOR_COLLECTION) 721 collection_hsdev = hsdev; 722 } 723 } 724 if (last_hsdev) 725 last_hsdev->end_collection_index = i; 726 if (collection_hsdev) 727 collection_hsdev->end_collection_index = i; 728 729 ret = mfd_add_hotplug_devices(&hdev->dev, 730 sd->hid_sensor_hub_client_devs, 731 sd->hid_sensor_client_cnt); 732 if (ret < 0) 733 goto err_stop_hw; 734 735 return ret; 736 737 err_stop_hw: 738 hid_hw_stop(hdev); 739 740 return ret; 741 } 742 743 static void sensor_hub_remove(struct hid_device *hdev) 744 { 745 struct sensor_hub_data *data = hid_get_drvdata(hdev); 746 unsigned long flags; 747 int i; 748 749 hid_dbg(hdev, " hardware removed\n"); 750 hid_hw_close(hdev); 751 hid_hw_stop(hdev); 752 spin_lock_irqsave(&data->lock, flags); 753 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 754 struct hid_sensor_hub_device *hsdev = 755 data->hid_sensor_hub_client_devs[i].platform_data; 756 if (hsdev->pending.status) 757 complete(&hsdev->pending.ready); 758 } 759 spin_unlock_irqrestore(&data->lock, flags); 760 mfd_remove_devices(&hdev->dev); 761 hid_set_drvdata(hdev, NULL); 762 mutex_destroy(&data->mutex); 763 } 764 765 static const struct hid_device_id sensor_hub_devices[] = { 766 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 767 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 768 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 769 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 770 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 771 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 772 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 773 USB_DEVICE_ID_INTEL_HID_SENSOR_1), 774 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 775 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 776 USB_DEVICE_ID_MS_SURFACE_PRO_2), 777 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 778 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 779 USB_DEVICE_ID_MS_TOUCH_COVER_2), 780 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 781 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 782 USB_DEVICE_ID_MS_TYPE_COVER_2), 783 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 784 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 785 USB_DEVICE_ID_STM_HID_SENSOR), 786 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 787 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 788 USB_DEVICE_ID_STM_HID_SENSOR_1), 789 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 790 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS, 791 USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA), 792 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 793 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 794 USB_DEVICE_ID_ITE_LENOVO_YOGA), 795 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 796 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 797 USB_DEVICE_ID_ITE_LENOVO_YOGA2), 798 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 799 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 800 USB_DEVICE_ID_ITE_LENOVO_YOGA900), 801 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 802 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 803 0x22D8), 804 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 805 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 806 HID_ANY_ID) }, 807 { } 808 }; 809 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 810 811 static struct hid_driver sensor_hub_driver = { 812 .name = "hid-sensor-hub", 813 .id_table = sensor_hub_devices, 814 .probe = sensor_hub_probe, 815 .remove = sensor_hub_remove, 816 .raw_event = sensor_hub_raw_event, 817 .report_fixup = sensor_hub_report_fixup, 818 #ifdef CONFIG_PM 819 .suspend = sensor_hub_suspend, 820 .resume = sensor_hub_resume, 821 .reset_resume = sensor_hub_reset_resume, 822 #endif 823 }; 824 module_hid_driver(sensor_hub_driver); 825 826 MODULE_DESCRIPTION("HID Sensor Hub driver"); 827 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 828 MODULE_LICENSE("GPL"); 829