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 memset(buffer, 0, buffer_size); 216 mutex_lock(&data->mutex); 217 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 218 if (!report || (field_index >= report->maxfield)) { 219 ret = -EINVAL; 220 goto done_proc; 221 } 222 223 remaining_bytes = buffer_size % sizeof(__s32); 224 buffer_size = buffer_size / sizeof(__s32); 225 if (buffer_size) { 226 for (i = 0; i < buffer_size; ++i) { 227 hid_set_field(report->field[field_index], i, 228 (__force __s32)cpu_to_le32(*buf32)); 229 ++buf32; 230 } 231 } 232 if (remaining_bytes) { 233 value = 0; 234 memcpy(&value, (u8 *)buf32, remaining_bytes); 235 hid_set_field(report->field[field_index], i, 236 (__force __s32)cpu_to_le32(value)); 237 } 238 hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT); 239 hid_hw_wait(hsdev->hdev); 240 241 done_proc: 242 mutex_unlock(&data->mutex); 243 244 return ret; 245 } 246 EXPORT_SYMBOL_GPL(sensor_hub_set_feature); 247 248 int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id, 249 u32 field_index, int buffer_size, void *buffer) 250 { 251 struct hid_report *report; 252 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 253 int report_size; 254 int ret = 0; 255 u8 *val_ptr; 256 int buffer_index = 0; 257 int i; 258 259 mutex_lock(&data->mutex); 260 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 261 if (!report || (field_index >= report->maxfield) || 262 report->field[field_index]->report_count < 1) { 263 ret = -EINVAL; 264 goto done_proc; 265 } 266 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 267 hid_hw_wait(hsdev->hdev); 268 269 /* calculate number of bytes required to read this field */ 270 report_size = DIV_ROUND_UP(report->field[field_index]->report_size, 271 8) * 272 report->field[field_index]->report_count; 273 if (!report_size) { 274 ret = -EINVAL; 275 goto done_proc; 276 } 277 ret = min(report_size, buffer_size); 278 279 val_ptr = (u8 *)report->field[field_index]->value; 280 for (i = 0; i < report->field[field_index]->report_count; ++i) { 281 if (buffer_index >= ret) 282 break; 283 284 memcpy(&((u8 *)buffer)[buffer_index], val_ptr, 285 report->field[field_index]->report_size / 8); 286 val_ptr += sizeof(__s32); 287 buffer_index += (report->field[field_index]->report_size / 8); 288 } 289 290 done_proc: 291 mutex_unlock(&data->mutex); 292 293 return ret; 294 } 295 EXPORT_SYMBOL_GPL(sensor_hub_get_feature); 296 297 298 int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev, 299 u32 usage_id, 300 u32 attr_usage_id, u32 report_id, 301 enum sensor_hub_read_flags flag) 302 { 303 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 304 unsigned long flags; 305 struct hid_report *report; 306 int ret_val = 0; 307 308 report = sensor_hub_report(report_id, hsdev->hdev, 309 HID_INPUT_REPORT); 310 if (!report) 311 return -EINVAL; 312 313 mutex_lock(hsdev->mutex_ptr); 314 if (flag == SENSOR_HUB_SYNC) { 315 memset(&hsdev->pending, 0, sizeof(hsdev->pending)); 316 init_completion(&hsdev->pending.ready); 317 hsdev->pending.usage_id = usage_id; 318 hsdev->pending.attr_usage_id = attr_usage_id; 319 hsdev->pending.raw_size = 0; 320 321 spin_lock_irqsave(&data->lock, flags); 322 hsdev->pending.status = true; 323 spin_unlock_irqrestore(&data->lock, flags); 324 } 325 mutex_lock(&data->mutex); 326 hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); 327 mutex_unlock(&data->mutex); 328 if (flag == SENSOR_HUB_SYNC) { 329 wait_for_completion_interruptible_timeout( 330 &hsdev->pending.ready, HZ*5); 331 switch (hsdev->pending.raw_size) { 332 case 1: 333 ret_val = *(u8 *)hsdev->pending.raw_data; 334 break; 335 case 2: 336 ret_val = *(u16 *)hsdev->pending.raw_data; 337 break; 338 case 4: 339 ret_val = *(u32 *)hsdev->pending.raw_data; 340 break; 341 default: 342 ret_val = 0; 343 } 344 kfree(hsdev->pending.raw_data); 345 hsdev->pending.status = false; 346 } 347 mutex_unlock(hsdev->mutex_ptr); 348 349 return ret_val; 350 } 351 EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); 352 353 int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, 354 u32 report_id, int field_index, u32 usage_id) 355 { 356 struct hid_report *report; 357 struct hid_field *field; 358 int i; 359 360 report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); 361 if (!report || (field_index >= report->maxfield)) 362 goto done_proc; 363 364 field = report->field[field_index]; 365 for (i = 0; i < field->maxusage; ++i) { 366 if (field->usage[i].hid == usage_id) 367 return field->usage[i].usage_index; 368 } 369 370 done_proc: 371 return -EINVAL; 372 } 373 EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); 374 375 int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev, 376 u8 type, 377 u32 usage_id, 378 u32 attr_usage_id, 379 struct hid_sensor_hub_attribute_info *info) 380 { 381 int ret = -1; 382 int i; 383 struct hid_report *report; 384 struct hid_field *field; 385 struct hid_report_enum *report_enum; 386 struct hid_device *hdev = hsdev->hdev; 387 388 /* Initialize with defaults */ 389 info->usage_id = usage_id; 390 info->attrib_id = attr_usage_id; 391 info->report_id = -1; 392 info->index = -1; 393 info->units = -1; 394 info->unit_expo = -1; 395 396 report_enum = &hdev->report_enum[type]; 397 list_for_each_entry(report, &report_enum->report_list, list) { 398 for (i = 0; i < report->maxfield; ++i) { 399 field = report->field[i]; 400 if (field->maxusage) { 401 if (field->physical == usage_id && 402 (field->logical == attr_usage_id || 403 field->usage[0].hid == 404 attr_usage_id) && 405 (field->usage[0].collection_index >= 406 hsdev->start_collection_index) && 407 (field->usage[0].collection_index < 408 hsdev->end_collection_index)) { 409 410 sensor_hub_fill_attr_info(info, i, 411 report->id, 412 field); 413 ret = 0; 414 break; 415 } 416 } 417 } 418 419 } 420 421 return ret; 422 } 423 EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info); 424 425 #ifdef CONFIG_PM 426 static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message) 427 { 428 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 429 struct hid_sensor_hub_callbacks_list *callback; 430 unsigned long flags; 431 432 hid_dbg(hdev, " sensor_hub_suspend\n"); 433 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 434 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 435 if (callback->usage_callback->suspend) 436 callback->usage_callback->suspend( 437 callback->hsdev, callback->priv); 438 } 439 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 440 441 return 0; 442 } 443 444 static int sensor_hub_resume(struct hid_device *hdev) 445 { 446 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 447 struct hid_sensor_hub_callbacks_list *callback; 448 unsigned long flags; 449 450 hid_dbg(hdev, " sensor_hub_resume\n"); 451 spin_lock_irqsave(&pdata->dyn_callback_lock, flags); 452 list_for_each_entry(callback, &pdata->dyn_callback_list, list) { 453 if (callback->usage_callback->resume) 454 callback->usage_callback->resume( 455 callback->hsdev, callback->priv); 456 } 457 spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); 458 459 return 0; 460 } 461 462 static int sensor_hub_reset_resume(struct hid_device *hdev) 463 { 464 return 0; 465 } 466 #endif 467 468 /* 469 * Handle raw report as sent by device 470 */ 471 static int sensor_hub_raw_event(struct hid_device *hdev, 472 struct hid_report *report, u8 *raw_data, int size) 473 { 474 int i; 475 u8 *ptr; 476 int sz; 477 struct sensor_hub_data *pdata = hid_get_drvdata(hdev); 478 unsigned long flags; 479 struct hid_sensor_hub_callbacks *callback = NULL; 480 struct hid_collection *collection = NULL; 481 void *priv = NULL; 482 struct hid_sensor_hub_device *hsdev = NULL; 483 484 hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n", 485 report->id, size, report->type); 486 hid_dbg(hdev, "maxfield:%d\n", report->maxfield); 487 if (report->type != HID_INPUT_REPORT) 488 return 1; 489 490 ptr = raw_data; 491 ptr++; /* Skip report id */ 492 493 spin_lock_irqsave(&pdata->lock, flags); 494 495 for (i = 0; i < report->maxfield; ++i) { 496 hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n", 497 i, report->field[i]->usage->collection_index, 498 report->field[i]->usage->hid, 499 (report->field[i]->report_size * 500 report->field[i]->report_count)/8); 501 sz = (report->field[i]->report_size * 502 report->field[i]->report_count)/8; 503 collection = &hdev->collection[ 504 report->field[i]->usage->collection_index]; 505 hid_dbg(hdev, "collection->usage %x\n", 506 collection->usage); 507 508 callback = sensor_hub_get_callback(hdev, 509 report->field[i]->physical, 510 report->field[i]->usage[0].collection_index, 511 &hsdev, &priv); 512 if (!callback) { 513 ptr += sz; 514 continue; 515 } 516 if (hsdev->pending.status && (hsdev->pending.attr_usage_id == 517 report->field[i]->usage->hid || 518 hsdev->pending.attr_usage_id == 519 report->field[i]->logical)) { 520 hid_dbg(hdev, "data was pending ...\n"); 521 hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC); 522 if (hsdev->pending.raw_data) 523 hsdev->pending.raw_size = sz; 524 else 525 hsdev->pending.raw_size = 0; 526 complete(&hsdev->pending.ready); 527 } 528 if (callback->capture_sample) { 529 if (report->field[i]->logical) 530 callback->capture_sample(hsdev, 531 report->field[i]->logical, sz, ptr, 532 callback->pdev); 533 else 534 callback->capture_sample(hsdev, 535 report->field[i]->usage->hid, sz, ptr, 536 callback->pdev); 537 } 538 ptr += sz; 539 } 540 if (callback && collection && callback->send_event) 541 callback->send_event(hsdev, collection->usage, 542 callback->pdev); 543 spin_unlock_irqrestore(&pdata->lock, flags); 544 545 return 1; 546 } 547 548 int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev) 549 { 550 int ret = 0; 551 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 552 553 mutex_lock(&data->mutex); 554 if (!data->ref_cnt) { 555 ret = hid_hw_open(hsdev->hdev); 556 if (ret) { 557 hid_err(hsdev->hdev, "failed to open hid device\n"); 558 mutex_unlock(&data->mutex); 559 return ret; 560 } 561 } 562 data->ref_cnt++; 563 mutex_unlock(&data->mutex); 564 565 return ret; 566 } 567 EXPORT_SYMBOL_GPL(sensor_hub_device_open); 568 569 void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev) 570 { 571 struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); 572 573 mutex_lock(&data->mutex); 574 data->ref_cnt--; 575 if (!data->ref_cnt) 576 hid_hw_close(hsdev->hdev); 577 mutex_unlock(&data->mutex); 578 } 579 EXPORT_SYMBOL_GPL(sensor_hub_device_close); 580 581 static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc, 582 unsigned int *rsize) 583 { 584 int index; 585 struct sensor_hub_data *sd = hid_get_drvdata(hdev); 586 unsigned char report_block[] = { 587 0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05}; 588 unsigned char power_block[] = { 589 0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05}; 590 591 if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) { 592 hid_dbg(hdev, "No Enum quirks\n"); 593 return rdesc; 594 } 595 596 /* Looks for power and report state usage id and force to 1 */ 597 for (index = 0; index < *rsize; ++index) { 598 if (((*rsize - index) > sizeof(report_block)) && 599 !memcmp(&rdesc[index], report_block, 600 sizeof(report_block))) { 601 rdesc[index + 4] = 0x01; 602 index += sizeof(report_block); 603 } 604 if (((*rsize - index) > sizeof(power_block)) && 605 !memcmp(&rdesc[index], power_block, 606 sizeof(power_block))) { 607 rdesc[index + 4] = 0x01; 608 index += sizeof(power_block); 609 } 610 } 611 612 /* Checks if the report descriptor of Thinkpad Helix 2 has a logical 613 * minimum for magnetic flux axis greater than the maximum */ 614 if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA && 615 *rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 && 616 rdesc[915] == 0x81 && rdesc[916] == 0x08 && 617 rdesc[917] == 0x00 && rdesc[918] == 0x27 && 618 rdesc[921] == 0x07 && rdesc[922] == 0x00) { 619 /* Sets negative logical minimum for mag x, y and z */ 620 rdesc[914] = rdesc[935] = rdesc[956] = 0xc0; 621 rdesc[915] = rdesc[936] = rdesc[957] = 0x7e; 622 rdesc[916] = rdesc[937] = rdesc[958] = 0xf7; 623 rdesc[917] = rdesc[938] = rdesc[959] = 0xff; 624 } 625 626 return rdesc; 627 } 628 629 static int sensor_hub_probe(struct hid_device *hdev, 630 const struct hid_device_id *id) 631 { 632 int ret; 633 struct sensor_hub_data *sd; 634 int i; 635 char *name; 636 int dev_cnt; 637 struct hid_sensor_hub_device *hsdev; 638 struct hid_sensor_hub_device *last_hsdev = NULL; 639 struct hid_sensor_hub_device *collection_hsdev = NULL; 640 641 sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL); 642 if (!sd) { 643 hid_err(hdev, "cannot allocate Sensor data\n"); 644 return -ENOMEM; 645 } 646 647 hid_set_drvdata(hdev, sd); 648 sd->quirks = id->driver_data; 649 650 spin_lock_init(&sd->lock); 651 spin_lock_init(&sd->dyn_callback_lock); 652 mutex_init(&sd->mutex); 653 ret = hid_parse(hdev); 654 if (ret) { 655 hid_err(hdev, "parse failed\n"); 656 return ret; 657 } 658 INIT_LIST_HEAD(&hdev->inputs); 659 660 ret = hid_hw_start(hdev, 0); 661 if (ret) { 662 hid_err(hdev, "hw start failed\n"); 663 return ret; 664 } 665 INIT_LIST_HEAD(&sd->dyn_callback_list); 666 sd->hid_sensor_client_cnt = 0; 667 668 dev_cnt = sensor_hub_get_physical_device_count(hdev); 669 if (dev_cnt > HID_MAX_PHY_DEVICES) { 670 hid_err(hdev, "Invalid Physical device count\n"); 671 ret = -EINVAL; 672 goto err_stop_hw; 673 } 674 sd->hid_sensor_hub_client_devs = devm_kzalloc(&hdev->dev, dev_cnt * 675 sizeof(struct mfd_cell), 676 GFP_KERNEL); 677 if (sd->hid_sensor_hub_client_devs == NULL) { 678 hid_err(hdev, "Failed to allocate memory for mfd cells\n"); 679 ret = -ENOMEM; 680 goto err_stop_hw; 681 } 682 683 for (i = 0; i < hdev->maxcollection; ++i) { 684 struct hid_collection *collection = &hdev->collection[i]; 685 686 if (collection->type == HID_COLLECTION_PHYSICAL || 687 collection->type == HID_COLLECTION_APPLICATION) { 688 689 hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev), 690 GFP_KERNEL); 691 if (!hsdev) { 692 hid_err(hdev, "cannot allocate hid_sensor_hub_device\n"); 693 ret = -ENOMEM; 694 goto err_stop_hw; 695 } 696 hsdev->hdev = hdev; 697 hsdev->vendor_id = hdev->vendor; 698 hsdev->product_id = hdev->product; 699 hsdev->usage = collection->usage; 700 hsdev->mutex_ptr = devm_kzalloc(&hdev->dev, 701 sizeof(struct mutex), 702 GFP_KERNEL); 703 if (!hsdev->mutex_ptr) { 704 ret = -ENOMEM; 705 goto err_stop_hw; 706 } 707 mutex_init(hsdev->mutex_ptr); 708 hsdev->start_collection_index = i; 709 if (last_hsdev) 710 last_hsdev->end_collection_index = i; 711 last_hsdev = hsdev; 712 name = devm_kasprintf(&hdev->dev, GFP_KERNEL, 713 "HID-SENSOR-%x", 714 collection->usage); 715 if (name == NULL) { 716 hid_err(hdev, "Failed MFD device name\n"); 717 ret = -ENOMEM; 718 goto err_stop_hw; 719 } 720 sd->hid_sensor_hub_client_devs[ 721 sd->hid_sensor_client_cnt].name = name; 722 sd->hid_sensor_hub_client_devs[ 723 sd->hid_sensor_client_cnt].platform_data = 724 hsdev; 725 sd->hid_sensor_hub_client_devs[ 726 sd->hid_sensor_client_cnt].pdata_size = 727 sizeof(*hsdev); 728 hid_dbg(hdev, "Adding %s:%d\n", name, 729 hsdev->start_collection_index); 730 sd->hid_sensor_client_cnt++; 731 if (collection_hsdev) 732 collection_hsdev->end_collection_index = i; 733 if (collection->type == HID_COLLECTION_APPLICATION && 734 collection->usage == HID_USAGE_SENSOR_COLLECTION) 735 collection_hsdev = hsdev; 736 } 737 } 738 if (last_hsdev) 739 last_hsdev->end_collection_index = i; 740 if (collection_hsdev) 741 collection_hsdev->end_collection_index = i; 742 743 ret = mfd_add_hotplug_devices(&hdev->dev, 744 sd->hid_sensor_hub_client_devs, 745 sd->hid_sensor_client_cnt); 746 if (ret < 0) 747 goto err_stop_hw; 748 749 return ret; 750 751 err_stop_hw: 752 hid_hw_stop(hdev); 753 754 return ret; 755 } 756 757 static void sensor_hub_remove(struct hid_device *hdev) 758 { 759 struct sensor_hub_data *data = hid_get_drvdata(hdev); 760 unsigned long flags; 761 int i; 762 763 hid_dbg(hdev, " hardware removed\n"); 764 hid_hw_close(hdev); 765 hid_hw_stop(hdev); 766 spin_lock_irqsave(&data->lock, flags); 767 for (i = 0; i < data->hid_sensor_client_cnt; ++i) { 768 struct hid_sensor_hub_device *hsdev = 769 data->hid_sensor_hub_client_devs[i].platform_data; 770 if (hsdev->pending.status) 771 complete(&hsdev->pending.ready); 772 } 773 spin_unlock_irqrestore(&data->lock, flags); 774 mfd_remove_devices(&hdev->dev); 775 hid_set_drvdata(hdev, NULL); 776 mutex_destroy(&data->mutex); 777 } 778 779 static const struct hid_device_id sensor_hub_devices[] = { 780 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 781 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 782 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 783 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 784 USB_DEVICE_ID_INTEL_HID_SENSOR_0), 785 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 786 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1, 787 USB_DEVICE_ID_INTEL_HID_SENSOR_1), 788 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 789 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 790 USB_DEVICE_ID_MS_SURFACE_PRO_2), 791 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 792 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 793 USB_DEVICE_ID_MS_TOUCH_COVER_2), 794 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 795 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_MICROSOFT, 796 USB_DEVICE_ID_MS_TYPE_COVER_2), 797 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 798 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 799 USB_DEVICE_ID_STM_HID_SENSOR), 800 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 801 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_STM_0, 802 USB_DEVICE_ID_STM_HID_SENSOR_1), 803 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 804 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_TEXAS_INSTRUMENTS, 805 USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA), 806 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 807 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 808 USB_DEVICE_ID_ITE_LENOVO_YOGA), 809 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 810 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 811 USB_DEVICE_ID_ITE_LENOVO_YOGA2), 812 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 813 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_ITE, 814 USB_DEVICE_ID_ITE_LENOVO_YOGA900), 815 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 816 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0, 817 0x22D8), 818 .driver_data = HID_SENSOR_HUB_ENUM_QUIRK}, 819 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID, 820 HID_ANY_ID) }, 821 { } 822 }; 823 MODULE_DEVICE_TABLE(hid, sensor_hub_devices); 824 825 static struct hid_driver sensor_hub_driver = { 826 .name = "hid-sensor-hub", 827 .id_table = sensor_hub_devices, 828 .probe = sensor_hub_probe, 829 .remove = sensor_hub_remove, 830 .raw_event = sensor_hub_raw_event, 831 .report_fixup = sensor_hub_report_fixup, 832 #ifdef CONFIG_PM 833 .suspend = sensor_hub_suspend, 834 .resume = sensor_hub_resume, 835 .reset_resume = sensor_hub_reset_resume, 836 #endif 837 }; 838 module_hid_driver(sensor_hub_driver); 839 840 MODULE_DESCRIPTION("HID Sensor Hub driver"); 841 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>"); 842 MODULE_LICENSE("GPL"); 843