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#include <linux/device.h> 20#include <linux/hid.h> 21#include <linux/module.h> 22#include <linux/slab.h> 23#include <linux/mfd/core.h> 24#include <linux/list.h> 25#include <linux/hid-sensor-ids.h> 26#include <linux/hid-sensor-hub.h> 27#include "hid-ids.h" 28 29#define HID_SENSOR_HUB_ENUM_QUIRK 0x01 30 31/** 32 * struct sensor_hub_data - Hold a instance data for a HID hub device 33 * @hsdev: Stored hid instance for current hub device. 34 * @mutex: Mutex to serialize synchronous request. 35 * @lock: Spin lock to protect pending request structure. 36 * @dyn_callback_list: Holds callback function 37 * @dyn_callback_lock: spin lock to protect callback list 38 * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance. 39 * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached). 40 * @ref_cnt: Number of MFD clients have opened this device 41 */ 42struct sensor_hub_data { 43 struct mutex mutex; 44 spinlock_t lock; 45 struct list_head dyn_callback_list; 46 spinlock_t dyn_callback_lock; 47 struct mfd_cell *hid_sensor_hub_client_devs; 48 int hid_sensor_client_cnt; 49 unsigned long quirks; 50 int ref_cnt; 51}; 52 53/** 54 * struct hid_sensor_hub_callbacks_list - Stores callback list 55 * @list: list head. 56 * @usage_id: usage id for a physical device. 57 * @usage_callback: Stores registered callback functions. 58 * @priv: Private data for a physical device. 59 */ 60struct hid_sensor_hub_callbacks_list { 61 struct list_head list; 62 u32 usage_id; 63 struct hid_sensor_hub_device *hsdev; 64 struct hid_sensor_hub_callbacks *usage_callback; 65 void *priv; 66}; 67 68static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev, 69 int dir) 70{ 71 struct hid_report *report; 72 73 list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) { 74 if (report->id == id) 75 return report; 76 } 77 hid_warn(hdev, "No report with id 0x%x found\n", id); 78 79 return NULL; 80} 81 82static int sensor_hub_get_physical_device_count(struct hid_device *hdev) 83{ 84 int i; 85 int count = 0; 86 87 for (i = 0; i < hdev->maxcollection; ++i) { 88 struct hid_collection *collection = &hdev->collection[i]; 89 if (collection->type == HID_COLLECTION_PHYSICAL || 90 collection->type == HID_COLLECTION_APPLICATION) 91 ++count; 92 } 93 94 return count; 95} 96 97static void sensor_hub_fill_attr_info( 98 struct hid_sensor_hub_attribute_info *info, 99 s32 index, s32 report_id, struct hid_field *field) 100{ 101 info->index = index; 102 info->report_id = report_id; 103 info->units = field->unit; 104 info->unit_expo = field->unit_exponent; 105 info->size = (field->report_size * field->report_count)/8; 106 info->logical_minimum = field->logical_minimum; 107 info->logical_maximum = field->logical_maximum; 108} 109 110static struct hid_sensor_hub_callbacks *sensor_hub_get_callback( 111 struct hid_device *hdev, 112 u32 usage_id, 113 int collection_index, 114 struct hid_sensor_hub_device **hsdev, 115 void **priv) 116{ 117 struct hid_sensor_hub_callbacks_list *callback; 118 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 119 unsigned long flags; 120 121 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 122 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 123 if ((callback->usage_id == usage_id || 124 callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && 125 (collection_index >= 126 callback->hsdev->start_collection_index) && 127 (collection_index < 128 callback->hsdev->end_collection_index)) { 129 *priv = callback->priv; 130 *hsdev = callback->hsdev; 131 spin_unlock_irqrestore(&pdata->dyn_callback_lock, 132 flags); 133 return callback->usage_callback; 134 } 135 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 136 137 return NULL; 138} 139 140int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev, 141 u32 usage_id, 142 struct hid_sensor_hub_callbacks *usage_callback) 143{ 144 struct hid_sensor_hub_callbacks_list *callback; 145 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 146 unsigned long flags; 147 148 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 149 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 150 if (callback->usage_id == usage_id && 151 callback->hsdev == hsdev) { 152 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 153 return -EINVAL; 154 } 155 callback = kzalloc(sizeof(*callback), GFP_ATOMIC); 156 if (!callback) { 157 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 158 return -ENOMEM; 159 } 160 callback->hsdev = hsdev; 161 callback->usage_callback = usage_callback; 162 callback->usage_id = usage_id; 163 callback->priv = NULL; 164 /* 165 * If there is a handler registered for the collection type, then 166 * it will handle all reports for sensors in this collection. If 167 * there is also an individual sensor handler registration, then 168 * we want to make sure that the reports are directed to collection 169 * handler, as this may be a fusion sensor. So add collection handlers 170 * to the beginning of the list, so that they are matched first. 171 */ 172 if (usage_id == HID_USAGE_SENSOR_COLLECTION) 173 list_add(&callback->list, &pdata->dyn_callback_list); 174 else 175 list_add_tail(&callback->list, &pdata->dyn_callback_list); 176 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 177 178 return 0; 179} 180EXPORT_SYMBOL_GPL(sensor_hub_register_callback); 181 182int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev, 183 u32 usage_id) 184{ 185 struct hid_sensor_hub_callbacks_list *callback; 186 struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev); 187 unsigned long flags; 188 189 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 190 list_for_each_entry(callback, &pdata->dyn_callback_list, list) 191 if (callback->usage_id == usage_id && 192 callback->hsdev == hsdev) { 193 list_del(&callback->list); 194 kfree(callback); 195 break; 196 } 197 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 198 199 return 0; 200} 201EXPORT_SYMBOL_GPL(sensor_hub_remove_callback); 202 203int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 204 u32 field_index, int buffer_size, void *buffer) 205{ 206 struct hid_report *report; 207 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 208 __s32 *buf32 = buffer; 209 int i = 0; 210 int remaining_bytes; 211 __s32 value; 212 int ret = 0; 213 214 mutex_lock(&data->mutex); 215 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 216 if (!report || (field_index >= report->maxfield)) { 217 ret = -EINVAL; 218 goto done_proc; 219 } 220 221 remaining_bytes = do_div(buffer_size, sizeof(__s32)); 222 if (buffer_size) { 223 for (i = 0; i < buffer_size; ++i) { 224 hid_set_field(report->field[field_index], i, 225 (__force __s32)cpu_to_le32(*buf32)); 226 ++buf32; 227 } 228 } 229 if (remaining_bytes) { 230 value = 0; 231 memcpy(&value, (u8 *)buf32, remaining_bytes); 232 hid_set_field(report->field[field_index], i, 233 (__force __s32)cpu_to_le32(value)); 234 } 235 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); 236 hid_hw_wait(hsdev->hdev); 237 238done_proc: 239 mutex_unlock(&data->mutex); 240 241 return ret; 242} 243EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 244 245int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 246 u32 field_index, int buffer_size, void *buffer) 247{ 248 struct hid_report *report; 249 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 250 int report_size; 251 int ret = 0; 252 253 mutex_lock(&data->mutex); 254 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 255 if (!report || (field_index >= report->maxfield) || 256 report->field[field_index]->report_count < 1) { 257 ret = -EINVAL; 258 goto done_proc; 259 } 260 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 261 hid_hw_wait(hsdev->hdev); 262 263 /* calculate number of bytes required to read this field */ 264 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 265 8) * 266 report->field[field_index]->report_count; 267 if (!report_size) { 268 ret = -EINVAL; 269 goto done_proc; 270 } 271 ret = min(report_size, buffer_size); 272 memcpy(buffer, report->field[field_index]->value, ret); 273 274done_proc: 275 mutex_unlock(&data->mutex); 276 277 return ret; 278} 279EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 280 281 282int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 283 u32 usage_id, 284 u32 attr_usage_id, u32 report_id, 285 enum sensor_hub_read_flags flag) 286{ 287 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 288 unsigned long flags; 289 struct hid_report *report; 290 int ret_val = 0; 291 292 report = sensor_hub_report(report_id, hsdev->hdev, 293 HID_INPUT_REPORT); 294 if (!report) 295 return -EINVAL; 296 297 mutex_lock(hsdev->mutex_ptr); 298 if (flag == SENSOR_HUB_SYNC) { 299 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 300 init_completion(&hsdev->pending.ready); 301 hsdev->pending.usage_id = usage_id; 302 hsdev->pending.attr_usage_id = attr_usage_id; 303 hsdev->pending.raw_size = 0; 304 305 spin_lock_irqsave(&data->lock, flags); 306 hsdev->pending.status = true; 307 spin_unlock_irqrestore(&data->lock, flags); 308 } 309 mutex_lock(&data->mutex); 310 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 311 mutex_unlock(&data->mutex); 312 if (flag == SENSOR_HUB_SYNC) { 313 wait_for_completion_interruptible_timeout( 314 &hsdev->pending.ready, HZ*5); 315 switch (hsdev->pending.raw_size) { 316 case 1: 317 ret_val = *(u8 *)hsdev->pending.raw_data; 318 break; 319 case 2: 320 ret_val = *(u16 *)hsdev->pending.raw_data; 321 break; 322 case 4: 323 ret_val = *(u32 *)hsdev->pending.raw_data; 324 break; 325 default: 326 ret_val = 0; 327 } 328 kfree(hsdev->pending.raw_data); 329 hsdev->pending.status = false; 330 } 331 mutex_unlock(hsdev->mutex_ptr); 332 333 return ret_val; 334} 335EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 336 337int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 338 u32 report_id, int field_index, u32 usage_id) 339{ 340 struct hid_report *report; 341 struct hid_field *field; 342 int i; 343 344 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 345 if (!report || (field_index >= report->maxfield)) 346 goto done_proc; 347 348 field = report->field[field_index]; 349 for (i = 0; i < field->maxusage; ++i) { 350 if (field->usage[i].hid == usage_id) 351 return field->usage[i].usage_index; 352 } 353 354done_proc: 355 return -EINVAL; 356} 357EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 358 359int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 360 u8 type, 361 u32 usage_id, 362 u32 attr_usage_id, 363 struct hid_sensor_hub_attribute_info *info) 364{ 365 int ret = -1; 366 int i; 367 struct hid_report *report; 368 struct hid_field *field; 369 struct hid_report_enum *report_enum; 370 struct hid_device *hdev = hsdev->hdev; 371 372 /* Initialize with defaults */ 373 info->usage_id = usage_id; 374 info->attrib_id = attr_usage_id; 375 info->report_id = -1; 376 info->index = -1; 377 info->units = -1; 378 info->unit_expo = -1; 379 380 report_enum = &hdev->report_enum[type]; 381 list_for_each_entry(report, &report_enum->report_list, list) { 382 for (i = 0; i < report->maxfield; ++i) { 383 field = report->field[i]; 384 if (field->maxusage) { 385 if (field->physical == usage_id && 386 (field->logical == attr_usage_id || 387 field->usage[0].hid == 388 attr_usage_id) && 389 (field->usage[0].collection_index >= 390 hsdev->start_collection_index) && 391 (field->usage[0].collection_index < 392 hsdev->end_collection_index)) { 393 394 sensor_hub_fill_attr_info(info, i, 395 report->id, 396 field); 397 ret = 0; 398 break; 399 } 400 } 401 } 402 403 } 404 405 return ret; 406} 407EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 408 409#ifdef CONFIG_PM 410static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 411{ 412 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 413 struct hid_sensor_hub_callbacks_list *callback; 414 unsigned long flags; 415 416 hid_dbg(hdev, " sensor_hub_suspend\n"); 417 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 418 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 419 if (callback->usage_callback->suspend) 420 callback->usage_callback->suspend( 421 callback->hsdev, callback->priv); 422 } 423 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 424 425 return 0; 426} 427 428static int sensor_hub_resume(struct hid_device *hdev) 429{ 430 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 431 struct hid_sensor_hub_callbacks_list *callback; 432 unsigned long flags; 433 434 hid_dbg(hdev, " sensor_hub_resume\n"); 435 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 436 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 437 if (callback->usage_callback->resume) 438 callback->usage_callback->resume( 439 callback->hsdev, callback->priv); 440 } 441 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 442 443 return 0; 444} 445 446static int sensor_hub_reset_resume(struct hid_device *hdev) 447{ 448 return 0; 449} 450#endif 451 452/* 453 * Handle raw report as sent by device 454 */ 455static int sensor_hub_raw_event(struct hid_device *hdev, 456 struct hid_report *report, u8 *raw_data, int size) 457{ 458 int i; 459 u8 *ptr; 460 int sz; 461 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 462 unsigned long flags; 463 struct hid_sensor_hub_callbacks *callback = NULL; 464 struct hid_collection *collection = NULL; 465 void *priv = NULL; 466 struct hid_sensor_hub_device *hsdev = NULL; 467 468 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 469 report->id, size, report->type); 470 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 471 if (report->type != HID_INPUT_REPORT) 472 return 1; 473 474 ptr = raw_data; 475 ptr++; /* Skip report id */ 476 477 spin_lock_irqsave(&pdata->lock, flags); 478 479 for (i = 0; i < report->maxfield; ++i) { 480 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 481 i, report->field[i]->usage->collection_index, 482 report->field[i]->usage->hid, 483 (report->field[i]->report_size * 484 report->field[i]->report_count)/8); 485 sz = (report->field[i]->report_size * 486 report->field[i]->report_count)/8; 487 collection = &hdev->collection[ 488 report->field[i]->usage->collection_index]; 489 hid_dbg(hdev, "collection->usage %x\n", 490 collection->usage); 491 492 callback = sensor_hub_get_callback(hdev, 493 report->field[i]->physical, 494 report->field[i]->usage[0].collection_index, 495 &hsdev, &priv); 496 if (!callback) { 497 ptr += sz; 498 continue; 499 } 500 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 501 report->field[i]->usage->hid || 502 hsdev->pending.attr_usage_id == 503 report->field[i]->logical)) { 504 hid_dbg(hdev, "data was pending ...\n"); 505 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 506 if (hsdev->pending.raw_data) 507 hsdev->pending.raw_size = sz; 508 else 509 hsdev->pending.raw_size = 0; 510 complete(&hsdev->pending.ready); 511 } 512 if (callback->capture_sample) { 513 if (report->field[i]->logical) 514 callback->capture_sample(hsdev, 515 report->field[i]->logical, sz, ptr, 516 callback->pdev); 517 else 518 callback->capture_sample(hsdev, 519 report->field[i]->usage->hid, sz, ptr, 520 callback->pdev); 521 } 522 ptr += sz; 523 } 524 if (callback && collection && callback->send_event) 525 callback->send_event(hsdev, collection->usage, 526 callback->pdev); 527 spin_unlock_irqrestore(&pdata->lock, flags); 528 529 return 1; 530} 531 532int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 533{ 534 int ret = 0; 535 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 536 537 mutex_lock(&data->mutex); 538 if (!data->ref_cnt) { 539 ret = hid_hw_open(hsdev->hdev); 540 if (ret) { 541 hid_err(hsdev->hdev, "failed to open hid device\n"); 542 mutex_unlock(&data->mutex); 543 return ret; 544 } 545 } 546 data->ref_cnt++; 547 mutex_unlock(&data->mutex); 548 549 return ret; 550} 551EXPORT_SYMBOL_GPL(sensor_hub_device_open); 552 553void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 554{ 555 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 556 557 mutex_lock(&data->mutex); 558 data->ref_cnt--; 559 if (!data->ref_cnt) 560 hid_hw_close(hsdev->hdev); 561 mutex_unlock(&data->mutex); 562} 563EXPORT_SYMBOL_GPL(sensor_hub_device_close); 564 565static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 566 unsigned int *rsize) 567{ 568 int index; 569 struct sensor_hub_data *sd = hid_get_drvdata(hdev); 570 unsigned char report_block[] = { 571 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05}; 572 unsigned char power_block[] = { 573 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05}; 574 575 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) { 576 hid_dbg(hdev, "No Enum quirks\n"); 577 return rdesc; 578 } 579 580 /* Looks for power and report state usage id and force to 1 */ 581 for (index = 0; index < *rsize; ++index) { 582 if (((*rsize - index) > sizeof(report_block)) && 583 !memcmp(&rdesc[index], report_block, 584 sizeof(report_block))) { 585 rdesc[index + 4] = 0x01; 586 index += sizeof(report_block); 587 } 588 if (((*rsize - index) > sizeof(power_block)) && 589 !memcmp(&rdesc[index], power_block, 590 sizeof(power_block))) { 591 rdesc[index + 4] = 0x01; 592 index += sizeof(power_block); 593 } 594 } 595 596 /* Checks if the report descriptor of Thinkpad Helix 2 has a logical 597 * minimum for magnetic flux axis greater than the maximum */ 598 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 599 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 600 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 601 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 602 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 603 /* Sets negative logical minimum for mag x, y and z */ 604 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 605 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 606 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 607 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 608 } 609 610 return rdesc; 611} 612 613static int sensor_hub_probe(struct hid_device *hdev, 614 const struct hid_device_id *id) 615{ 616 int ret; 617 struct sensor_hub_data *sd; 618 int i; 619 char *name; 620 int dev_cnt; 621 struct hid_sensor_hub_device *hsdev; 622 struct hid_sensor_hub_device *last_hsdev = NULL; 623 struct hid_sensor_hub_device *collection_hsdev = NULL; 624 625 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 626 if (!sd) { 627 hid_err(hdev, "cannot allocate Sensor data\n"); 628 return -ENOMEM; 629 } 630 631 hid_set_drvdata(hdev, sd); 632 sd->quirks = id->driver_data; 633 634 spin_lock_init(&sd->lock); 635 spin_lock_init(&sd->dyn_callback_lock); 636 mutex_init(&sd->mutex); 637 ret = hid_parse(hdev); 638 if (ret) { 639 hid_err(hdev, "parse failed\n"); 640 return ret; 641 } 642 INIT_LIST_HEAD(&hdev->inputs); 643 644 ret = hid_hw_start(hdev, 0); 645 if (ret) { 646 hid_err(hdev, "hw start failed\n"); 647 return ret; 648 } 649 INIT_LIST_HEAD(&sd->dyn_callback_list); 650 sd->hid_sensor_client_cnt = 0; 651 652 dev_cnt = sensor_hub_get_physical_device_count(hdev); 653 if (dev_cnt > HID_MAX_PHY_DEVICES) { 654 hid_err(hdev, "Invalid Physical device count\n"); 655 ret = -EINVAL; 656 goto err_stop_hw; 657 } 658 sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt * 659 sizeof(struct mfd_cell), 660 GFP_KERNEL); 661 if (sd->hid_sensor_hub_client_devs == NULL) { 662 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 663 ret = -ENOMEM; 664 goto err_stop_hw; 665 } 666 667 for (i = 0; i < hdev->maxcollection; ++i) { 668 struct hid_collection *collection = &hdev->collection[i]; 669 670 if (collection->type == HID_COLLECTION_PHYSICAL || 671 collection->type == HID_COLLECTION_APPLICATION) { 672 673 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 674 GFP_KERNEL); 675 if (!hsdev) { 676 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 677 ret = -ENOMEM; 678 goto err_stop_hw; 679 } 680 hsdev->hdev = hdev; 681 hsdev->vendor_id = hdev->vendor; 682 hsdev->product_id = hdev->product; 683 hsdev->usage = collection->usage; 684 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 685 sizeof(struct mutex), 686 GFP_KERNEL); 687 if (!hsdev->mutex_ptr) { 688 ret = -ENOMEM; 689 goto err_stop_hw; 690 } 691 mutex_init(hsdev->mutex_ptr); 692 hsdev->start_collection_index = i; 693 if (last_hsdev) 694 last_hsdev->end_collection_index = i; 695 last_hsdev = hsdev; 696 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 697 "HID-SENSOR-%x", 698 collection->usage); 699 if (name == NULL) { 700 hid_err(hdev, "Failed MFD device name\n"); 701 ret = -ENOMEM; 702 goto err_stop_hw; 703 } 704 sd->hid_sensor_hub_client_devs[ 705 sd->hid_sensor_client_cnt].name = name; 706 sd->hid_sensor_hub_client_devs[ 707 sd->hid_sensor_client_cnt].platform_data = 708 hsdev; 709 sd->hid_sensor_hub_client_devs[ 710 sd->hid_sensor_client_cnt].pdata_size = 711 sizeof(*hsdev); 712 hid_dbg(hdev, "Adding %s:%d\n", name, 713 hsdev->start_collection_index); 714 sd->hid_sensor_client_cnt++; 715 if (collection_hsdev) 716 collection_hsdev->end_collection_index = i; 717 if (collection->type == HID_COLLECTION_APPLICATION && 718 collection->usage == HID_USAGE_SENSOR_COLLECTION) 719 collection_hsdev = hsdev; 720 } 721 } 722 if (last_hsdev) 723 last_hsdev->end_collection_index = i; 724 if (collection_hsdev) 725 collection_hsdev->end_collection_index = i; 726 727 ret = mfd_add_hotplug_devices(&hdev->dev, 728 sd->hid_sensor_hub_client_devs, 729 sd->hid_sensor_client_cnt); 730 if (ret < 0) 731 goto err_stop_hw; 732 733 return ret; 734 735err_stop_hw: 736 hid_hw_stop(hdev); 737 738 return ret; 739} 740 741static void sensor_hub_remove(struct hid_device *hdev) 742{ 743 struct sensor_hub_data *data = hid_get_drvdata(hdev); 744 unsigned long flags; 745 int i; 746 747 hid_dbg(hdev, " hardware removed\n"); 748 hid_hw_close(hdev); 749 hid_hw_stop(hdev); 750 spin_lock_irqsave(&data->lock, flags); 751 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 752 struct hid_sensor_hub_device *hsdev = 753 data->hid_sensor_hub_client_devs[i].platform_data; 754 if (hsdev->pending.status) 755 complete(&hsdev->pending.ready); 756 } 757 spin_unlock_irqrestore(&data->lock, flags); 758 mfd_remove_devices(&hdev->dev); 759 hid_set_drvdata(hdev, NULL); 760 mutex_destroy(&data->mutex); 761} 762 763static const struct hid_device_id sensor_hub_devices[] = { 764 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 765 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 766 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 767 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 768 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 769 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 770 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 771 USB_DEVICE_ID_INTEL_HID_SENSOR_1), 772 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 773 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 774 USB_DEVICE_ID_MS_SURFACE_PRO_2), 775 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 776 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 777 USB_DEVICE_ID_MS_TOUCH_COVER_2), 778 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 779 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 780 USB_DEVICE_ID_MS_TYPE_COVER_2), 781 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 782 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 783 USB_DEVICE_ID_STM_HID_SENSOR), 784 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 785 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 786 USB_DEVICE_ID_STM_HID_SENSOR_1), 787 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 788 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS, 789 USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA), 790 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 791 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 792 USB_DEVICE_ID_ITE_LENOVO_YOGA), 793 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 794 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 795 USB_DEVICE_ID_ITE_LENOVO_YOGA2), 796 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 797 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 798 HID_ANY_ID) }, 799 { } 800}; 801MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 802 803static struct hid_driver sensor_hub_driver = { 804 .name = "hid-sensor-hub", 805 .id_table = sensor_hub_devices, 806 .probe = sensor_hub_probe, 807 .remove = sensor_hub_remove, 808 .raw_event = sensor_hub_raw_event, 809 .report_fixup = sensor_hub_report_fixup, 810#ifdef CONFIG_PM 811 .suspend = sensor_hub_suspend, 812 .resume = sensor_hub_resume, 813 .reset_resume = sensor_hub_reset_resume, 814#endif 815}; 816module_hid_driver(sensor_hub_driver); 817 818MODULE_DESCRIPTION("HID Sensor Hub driver"); 819MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 820MODULE_LICENSE("GPL"); 821