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 mutex_lock(&data->mutex); 259 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 260 if (!report || (field_index >= report->maxfield) || 261 report->field[field_index]->report_count < 1) { 262 ret = -EINVAL; 263 goto done_proc; 264 } 265 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 266 hid_hw_wait(hsdev->hdev); 267 268 /* calculate number of bytes required to read this field */ 269 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 270 8) * 271 report->field[field_index]->report_count; 272 if (!report_size) { 273 ret = -EINVAL; 274 goto done_proc; 275 } 276 ret = min(report_size, buffer_size); 277 278 val_ptr = (u8 *)report->field[field_index]->value; 279 for (i = 0; i < report->field[field_index]->report_count; ++i) { 280 if (buffer_index >= ret) 281 break; 282 283 memcpy(&((u8 *)buffer)[buffer_index], val_ptr, 284 report->field[field_index]->report_size / 8); 285 val_ptr += sizeof(__s32); 286 buffer_index += (report->field[field_index]->report_size / 8); 287 } 288 289 done_proc: 290 mutex_unlock(&data->mutex); 291 292 return ret; 293 } 294 EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 295 296 297 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 298 u32 usage_id, 299 u32 attr_usage_id, u32 report_id, 300 enum sensor_hub_read_flags flag) 301 { 302 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 303 unsigned long flags; 304 struct hid_report *report; 305 int ret_val = 0; 306 307 report = sensor_hub_report(report_id, hsdev->hdev, 308 HID_INPUT_REPORT); 309 if (!report) 310 return -EINVAL; 311 312 mutex_lock(hsdev->mutex_ptr); 313 if (flag == SENSOR_HUB_SYNC) { 314 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 315 init_completion(&hsdev->pending.ready); 316 hsdev->pending.usage_id = usage_id; 317 hsdev->pending.attr_usage_id = attr_usage_id; 318 hsdev->pending.raw_size = 0; 319 320 spin_lock_irqsave(&data->lock, flags); 321 hsdev->pending.status = true; 322 spin_unlock_irqrestore(&data->lock, flags); 323 } 324 mutex_lock(&data->mutex); 325 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 326 mutex_unlock(&data->mutex); 327 if (flag == SENSOR_HUB_SYNC) { 328 wait_for_completion_interruptible_timeout( 329 &hsdev->pending.ready, HZ*5); 330 switch (hsdev->pending.raw_size) { 331 case 1: 332 ret_val = *(u8 *)hsdev->pending.raw_data; 333 break; 334 case 2: 335 ret_val = *(u16 *)hsdev->pending.raw_data; 336 break; 337 case 4: 338 ret_val = *(u32 *)hsdev->pending.raw_data; 339 break; 340 default: 341 ret_val = 0; 342 } 343 kfree(hsdev->pending.raw_data); 344 hsdev->pending.status = false; 345 } 346 mutex_unlock(hsdev->mutex_ptr); 347 348 return ret_val; 349 } 350 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 351 352 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 353 u32 report_id, int field_index, u32 usage_id) 354 { 355 struct hid_report *report; 356 struct hid_field *field; 357 int i; 358 359 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 360 if (!report || (field_index >= report->maxfield)) 361 goto done_proc; 362 363 field = report->field[field_index]; 364 for (i = 0; i < field->maxusage; ++i) { 365 if (field->usage[i].hid == usage_id) 366 return field->usage[i].usage_index; 367 } 368 369 done_proc: 370 return -EINVAL; 371 } 372 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 373 374 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 375 u8 type, 376 u32 usage_id, 377 u32 attr_usage_id, 378 struct hid_sensor_hub_attribute_info *info) 379 { 380 int ret = -1; 381 int i; 382 struct hid_report *report; 383 struct hid_field *field; 384 struct hid_report_enum *report_enum; 385 struct hid_device *hdev = hsdev->hdev; 386 387 /* Initialize with defaults */ 388 info->usage_id = usage_id; 389 info->attrib_id = attr_usage_id; 390 info->report_id = -1; 391 info->index = -1; 392 info->units = -1; 393 info->unit_expo = -1; 394 395 report_enum = &hdev->report_enum[type]; 396 list_for_each_entry(report, &report_enum->report_list, list) { 397 for (i = 0; i < report->maxfield; ++i) { 398 field = report->field[i]; 399 if (field->maxusage) { 400 if (field->physical == usage_id && 401 (field->logical == attr_usage_id || 402 field->usage[0].hid == 403 attr_usage_id) && 404 (field->usage[0].collection_index >= 405 hsdev->start_collection_index) && 406 (field->usage[0].collection_index < 407 hsdev->end_collection_index)) { 408 409 sensor_hub_fill_attr_info(info, i, 410 report->id, 411 field); 412 ret = 0; 413 break; 414 } 415 } 416 } 417 418 } 419 420 return ret; 421 } 422 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 423 424 #ifdef CONFIG_PM 425 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 426 { 427 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 428 struct hid_sensor_hub_callbacks_list *callback; 429 unsigned long flags; 430 431 hid_dbg(hdev, " sensor_hub_suspend\n"); 432 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 433 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 434 if (callback->usage_callback->suspend) 435 callback->usage_callback->suspend( 436 callback->hsdev, callback->priv); 437 } 438 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 439 440 return 0; 441 } 442 443 static int sensor_hub_resume(struct hid_device *hdev) 444 { 445 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 446 struct hid_sensor_hub_callbacks_list *callback; 447 unsigned long flags; 448 449 hid_dbg(hdev, " sensor_hub_resume\n"); 450 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 451 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 452 if (callback->usage_callback->resume) 453 callback->usage_callback->resume( 454 callback->hsdev, callback->priv); 455 } 456 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 457 458 return 0; 459 } 460 461 static int sensor_hub_reset_resume(struct hid_device *hdev) 462 { 463 return 0; 464 } 465 #endif 466 467 /* 468 * Handle raw report as sent by device 469 */ 470 static int sensor_hub_raw_event(struct hid_device *hdev, 471 struct hid_report *report, u8 *raw_data, int size) 472 { 473 int i; 474 u8 *ptr; 475 int sz; 476 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 477 unsigned long flags; 478 struct hid_sensor_hub_callbacks *callback = NULL; 479 struct hid_collection *collection = NULL; 480 void *priv = NULL; 481 struct hid_sensor_hub_device *hsdev = NULL; 482 483 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 484 report->id, size, report->type); 485 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 486 if (report->type != HID_INPUT_REPORT) 487 return 1; 488 489 ptr = raw_data; 490 ptr++; /* Skip report id */ 491 492 spin_lock_irqsave(&pdata->lock, flags); 493 494 for (i = 0; i < report->maxfield; ++i) { 495 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 496 i, report->field[i]->usage->collection_index, 497 report->field[i]->usage->hid, 498 (report->field[i]->report_size * 499 report->field[i]->report_count)/8); 500 sz = (report->field[i]->report_size * 501 report->field[i]->report_count)/8; 502 collection = &hdev->collection[ 503 report->field[i]->usage->collection_index]; 504 hid_dbg(hdev, "collection->usage %x\n", 505 collection->usage); 506 507 callback = sensor_hub_get_callback(hdev, 508 report->field[i]->physical, 509 report->field[i]->usage[0].collection_index, 510 &hsdev, &priv); 511 if (!callback) { 512 ptr += sz; 513 continue; 514 } 515 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 516 report->field[i]->usage->hid || 517 hsdev->pending.attr_usage_id == 518 report->field[i]->logical)) { 519 hid_dbg(hdev, "data was pending ...\n"); 520 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 521 if (hsdev->pending.raw_data) 522 hsdev->pending.raw_size = sz; 523 else 524 hsdev->pending.raw_size = 0; 525 complete(&hsdev->pending.ready); 526 } 527 if (callback->capture_sample) { 528 if (report->field[i]->logical) 529 callback->capture_sample(hsdev, 530 report->field[i]->logical, sz, ptr, 531 callback->pdev); 532 else 533 callback->capture_sample(hsdev, 534 report->field[i]->usage->hid, sz, ptr, 535 callback->pdev); 536 } 537 ptr += sz; 538 } 539 if (callback && collection && callback->send_event) 540 callback->send_event(hsdev, collection->usage, 541 callback->pdev); 542 spin_unlock_irqrestore(&pdata->lock, flags); 543 544 return 1; 545 } 546 547 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 548 { 549 int ret = 0; 550 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 551 552 mutex_lock(&data->mutex); 553 if (!data->ref_cnt) { 554 ret = hid_hw_open(hsdev->hdev); 555 if (ret) { 556 hid_err(hsdev->hdev, "failed to open hid device\n"); 557 mutex_unlock(&data->mutex); 558 return ret; 559 } 560 } 561 data->ref_cnt++; 562 mutex_unlock(&data->mutex); 563 564 return ret; 565 } 566 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 567 568 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 569 { 570 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 571 572 mutex_lock(&data->mutex); 573 data->ref_cnt--; 574 if (!data->ref_cnt) 575 hid_hw_close(hsdev->hdev); 576 mutex_unlock(&data->mutex); 577 } 578 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 579 580 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 581 unsigned int *rsize) 582 { 583 int index; 584 struct sensor_hub_data *sd = hid_get_drvdata(hdev); 585 unsigned char report_block[] = { 586 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05}; 587 unsigned char power_block[] = { 588 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05}; 589 590 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) { 591 hid_dbg(hdev, "No Enum quirks\n"); 592 return rdesc; 593 } 594 595 /* Looks for power and report state usage id and force to 1 */ 596 for (index = 0; index < *rsize; ++index) { 597 if (((*rsize - index) > sizeof(report_block)) && 598 !memcmp(&rdesc[index], report_block, 599 sizeof(report_block))) { 600 rdesc[index + 4] = 0x01; 601 index += sizeof(report_block); 602 } 603 if (((*rsize - index) > sizeof(power_block)) && 604 !memcmp(&rdesc[index], power_block, 605 sizeof(power_block))) { 606 rdesc[index + 4] = 0x01; 607 index += sizeof(power_block); 608 } 609 } 610 611 /* Checks if the report descriptor of Thinkpad Helix 2 has a logical 612 * minimum for magnetic flux axis greater than the maximum */ 613 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 614 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 615 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 616 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 617 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 618 /* Sets negative logical minimum for mag x, y and z */ 619 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 620 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 621 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 622 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 623 } 624 625 return rdesc; 626 } 627 628 static int sensor_hub_probe(struct hid_device *hdev, 629 const struct hid_device_id *id) 630 { 631 int ret; 632 struct sensor_hub_data *sd; 633 int i; 634 char *name; 635 int dev_cnt; 636 struct hid_sensor_hub_device *hsdev; 637 struct hid_sensor_hub_device *last_hsdev = NULL; 638 struct hid_sensor_hub_device *collection_hsdev = NULL; 639 640 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 641 if (!sd) { 642 hid_err(hdev, "cannot allocate Sensor data\n"); 643 return -ENOMEM; 644 } 645 646 hid_set_drvdata(hdev, sd); 647 sd->quirks = id->driver_data; 648 649 spin_lock_init(&sd->lock); 650 spin_lock_init(&sd->dyn_callback_lock); 651 mutex_init(&sd->mutex); 652 ret = hid_parse(hdev); 653 if (ret) { 654 hid_err(hdev, "parse failed\n"); 655 return ret; 656 } 657 INIT_LIST_HEAD(&hdev->inputs); 658 659 ret = hid_hw_start(hdev, 0); 660 if (ret) { 661 hid_err(hdev, "hw start failed\n"); 662 return ret; 663 } 664 INIT_LIST_HEAD(&sd->dyn_callback_list); 665 sd->hid_sensor_client_cnt = 0; 666 667 dev_cnt = sensor_hub_get_physical_device_count(hdev); 668 if (dev_cnt > HID_MAX_PHY_DEVICES) { 669 hid_err(hdev, "Invalid Physical device count\n"); 670 ret = -EINVAL; 671 goto err_stop_hw; 672 } 673 sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt * 674 sizeof(struct mfd_cell), 675 GFP_KERNEL); 676 if (sd->hid_sensor_hub_client_devs == NULL) { 677 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 678 ret = -ENOMEM; 679 goto err_stop_hw; 680 } 681 682 for (i = 0; i < hdev->maxcollection; ++i) { 683 struct hid_collection *collection = &hdev->collection[i]; 684 685 if (collection->type == HID_COLLECTION_PHYSICAL || 686 collection->type == HID_COLLECTION_APPLICATION) { 687 688 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 689 GFP_KERNEL); 690 if (!hsdev) { 691 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 692 ret = -ENOMEM; 693 goto err_stop_hw; 694 } 695 hsdev->hdev = hdev; 696 hsdev->vendor_id = hdev->vendor; 697 hsdev->product_id = hdev->product; 698 hsdev->usage = collection->usage; 699 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 700 sizeof(struct mutex), 701 GFP_KERNEL); 702 if (!hsdev->mutex_ptr) { 703 ret = -ENOMEM; 704 goto err_stop_hw; 705 } 706 mutex_init(hsdev->mutex_ptr); 707 hsdev->start_collection_index = i; 708 if (last_hsdev) 709 last_hsdev->end_collection_index = i; 710 last_hsdev = hsdev; 711 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 712 "HID-SENSOR-%x", 713 collection->usage); 714 if (name == NULL) { 715 hid_err(hdev, "Failed MFD device name\n"); 716 ret = -ENOMEM; 717 goto err_stop_hw; 718 } 719 sd->hid_sensor_hub_client_devs[ 720 sd->hid_sensor_client_cnt].name = name; 721 sd->hid_sensor_hub_client_devs[ 722 sd->hid_sensor_client_cnt].platform_data = 723 hsdev; 724 sd->hid_sensor_hub_client_devs[ 725 sd->hid_sensor_client_cnt].pdata_size = 726 sizeof(*hsdev); 727 hid_dbg(hdev, "Adding %s:%d\n", name, 728 hsdev->start_collection_index); 729 sd->hid_sensor_client_cnt++; 730 if (collection_hsdev) 731 collection_hsdev->end_collection_index = i; 732 if (collection->type == HID_COLLECTION_APPLICATION && 733 collection->usage == HID_USAGE_SENSOR_COLLECTION) 734 collection_hsdev = hsdev; 735 } 736 } 737 if (last_hsdev) 738 last_hsdev->end_collection_index = i; 739 if (collection_hsdev) 740 collection_hsdev->end_collection_index = i; 741 742 ret = mfd_add_hotplug_devices(&hdev->dev, 743 sd->hid_sensor_hub_client_devs, 744 sd->hid_sensor_client_cnt); 745 if (ret < 0) 746 goto err_stop_hw; 747 748 return ret; 749 750 err_stop_hw: 751 hid_hw_stop(hdev); 752 753 return ret; 754 } 755 756 static void sensor_hub_remove(struct hid_device *hdev) 757 { 758 struct sensor_hub_data *data = hid_get_drvdata(hdev); 759 unsigned long flags; 760 int i; 761 762 hid_dbg(hdev, " hardware removed\n"); 763 hid_hw_close(hdev); 764 hid_hw_stop(hdev); 765 spin_lock_irqsave(&data->lock, flags); 766 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 767 struct hid_sensor_hub_device *hsdev = 768 data->hid_sensor_hub_client_devs[i].platform_data; 769 if (hsdev->pending.status) 770 complete(&hsdev->pending.ready); 771 } 772 spin_unlock_irqrestore(&data->lock, flags); 773 mfd_remove_devices(&hdev->dev); 774 hid_set_drvdata(hdev, NULL); 775 mutex_destroy(&data->mutex); 776 } 777 778 static const struct hid_device_id sensor_hub_devices[] = { 779 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 780 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 781 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 782 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 783 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 784 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 785 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 786 USB_DEVICE_ID_INTEL_HID_SENSOR_1), 787 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 788 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 789 USB_DEVICE_ID_MS_SURFACE_PRO_2), 790 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 791 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 792 USB_DEVICE_ID_MS_TOUCH_COVER_2), 793 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 794 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 795 USB_DEVICE_ID_MS_TYPE_COVER_2), 796 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 797 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 798 USB_DEVICE_ID_STM_HID_SENSOR), 799 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 800 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 801 USB_DEVICE_ID_STM_HID_SENSOR_1), 802 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 803 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS, 804 USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA), 805 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 806 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 807 USB_DEVICE_ID_ITE_LENOVO_YOGA), 808 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 809 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 810 USB_DEVICE_ID_ITE_LENOVO_YOGA2), 811 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 812 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 813 USB_DEVICE_ID_ITE_LENOVO_YOGA900), 814 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 815 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 816 0x22D8), 817 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 818 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 819 HID_ANY_ID) }, 820 { } 821 }; 822 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 823 824 static struct hid_driver sensor_hub_driver = { 825 .name = "hid-sensor-hub", 826 .id_table = sensor_hub_devices, 827 .probe = sensor_hub_probe, 828 .remove = sensor_hub_remove, 829 .raw_event = sensor_hub_raw_event, 830 .report_fixup = sensor_hub_report_fixup, 831 #ifdef CONFIG_PM 832 .suspend = sensor_hub_suspend, 833 .resume = sensor_hub_resume, 834 .reset_resume = sensor_hub_reset_resume, 835 #endif 836 }; 837 module_hid_driver(sensor_hub_driver); 838 839 MODULE_DESCRIPTION("HID Sensor Hub driver"); 840 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 841 MODULE_LICENSE("GPL"); 842