1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com> 4 * Copyright (c) 2013 Synaptics Incorporated 5 * Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com> 6 * Copyright (c) 2014 Red Hat, Inc 7 */ 8 9 #include <linux/kernel.h> 10 #include <linux/hid.h> 11 #include <linux/input.h> 12 #include <linux/input/mt.h> 13 #include <linux/irq.h> 14 #include <linux/irqdomain.h> 15 #include <linux/module.h> 16 #include <linux/pm.h> 17 #include <linux/slab.h> 18 #include <linux/wait.h> 19 #include <linux/sched.h> 20 #include <linux/rmi.h> 21 #include "hid-ids.h" 22 23 #define RMI_MOUSE_REPORT_ID 0x01 /* Mouse emulation Report */ 24 #define RMI_WRITE_REPORT_ID 0x09 /* Output Report */ 25 #define RMI_READ_ADDR_REPORT_ID 0x0a /* Output Report */ 26 #define RMI_READ_DATA_REPORT_ID 0x0b /* Input Report */ 27 #define RMI_ATTN_REPORT_ID 0x0c /* Input Report */ 28 #define RMI_SET_RMI_MODE_REPORT_ID 0x0f /* Feature Report */ 29 30 /* flags */ 31 #define RMI_READ_REQUEST_PENDING 0 32 #define RMI_READ_DATA_PENDING 1 33 #define RMI_STARTED 2 34 35 /* device flags */ 36 #define RMI_DEVICE BIT(0) 37 #define RMI_DEVICE_HAS_PHYS_BUTTONS BIT(1) 38 #define RMI_DEVICE_OUTPUT_SET_REPORT BIT(2) 39 40 /* 41 * retrieve the ctrl registers 42 * the ctrl register has a size of 20 but a fw bug split it into 16 + 4, 43 * and there is no way to know if the first 20 bytes are here or not. 44 * We use only the first 12 bytes, so get only them. 45 */ 46 #define RMI_F11_CTRL_REG_COUNT 12 47 48 enum rmi_mode_type { 49 RMI_MODE_OFF = 0, 50 RMI_MODE_ATTN_REPORTS = 1, 51 RMI_MODE_NO_PACKED_ATTN_REPORTS = 2, 52 }; 53 54 /** 55 * struct rmi_data - stores information for hid communication 56 * 57 * @page_mutex: Locks current page to avoid changing pages in unexpected ways. 58 * @page: Keeps track of the current virtual page 59 * @xport: transport device to be registered with the RMI4 core. 60 * 61 * @wait: Used for waiting for read data 62 * 63 * @writeReport: output buffer when writing RMI registers 64 * @readReport: input buffer when reading RMI registers 65 * 66 * @input_report_size: size of an input report (advertised by HID) 67 * @output_report_size: size of an output report (advertised by HID) 68 * 69 * @flags: flags for the current device (started, reading, etc...) 70 * 71 * @reset_work: worker which will be called in case of a mouse report 72 * @hdev: pointer to the struct hid_device 73 * 74 * @device_flags: flags which describe the device 75 * 76 * @domain: the IRQ domain allocated for this RMI4 device 77 * @rmi_irq: the irq that will be used to generate events to rmi-core 78 */ 79 struct rmi_data { 80 struct mutex page_mutex; 81 int page; 82 struct rmi_transport_dev xport; 83 84 wait_queue_head_t wait; 85 86 u8 *writeReport; 87 u8 *readReport; 88 89 u32 input_report_size; 90 u32 output_report_size; 91 92 unsigned long flags; 93 94 struct work_struct reset_work; 95 struct hid_device *hdev; 96 97 unsigned long device_flags; 98 99 struct irq_domain *domain; 100 int rmi_irq; 101 }; 102 103 #define RMI_PAGE(addr) (((addr) >> 8) & 0xff) 104 105 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len); 106 107 /** 108 * rmi_set_page - Set RMI page 109 * @hdev: The pointer to the hid_device struct 110 * @page: The new page address. 111 * 112 * RMI devices have 16-bit addressing, but some of the physical 113 * implementations (like SMBus) only have 8-bit addressing. So RMI implements 114 * a page address at 0xff of every page so we can reliable page addresses 115 * every 256 registers. 116 * 117 * The page_mutex lock must be held when this function is entered. 118 * 119 * Returns zero on success, non-zero on failure. 120 */ 121 static int rmi_set_page(struct hid_device *hdev, u8 page) 122 { 123 struct rmi_data *data = hid_get_drvdata(hdev); 124 int retval; 125 126 data->writeReport[0] = RMI_WRITE_REPORT_ID; 127 data->writeReport[1] = 1; 128 data->writeReport[2] = 0xFF; 129 data->writeReport[4] = page; 130 131 retval = rmi_write_report(hdev, data->writeReport, 132 data->output_report_size); 133 if (retval != data->output_report_size) { 134 dev_err(&hdev->dev, 135 "%s: set page failed: %d.", __func__, retval); 136 return retval; 137 } 138 139 data->page = page; 140 return 0; 141 } 142 143 static int rmi_set_mode(struct hid_device *hdev, u8 mode) 144 { 145 int ret; 146 const u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode}; 147 u8 *buf; 148 149 buf = kmemdup(txbuf, sizeof(txbuf), GFP_KERNEL); 150 if (!buf) 151 return -ENOMEM; 152 153 ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, buf, 154 sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT); 155 kfree(buf); 156 if (ret < 0) { 157 dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode, 158 ret); 159 return ret; 160 } 161 162 return 0; 163 } 164 165 static int rmi_write_report(struct hid_device *hdev, u8 *report, int len) 166 { 167 struct rmi_data *data = hid_get_drvdata(hdev); 168 int ret; 169 170 if (data->device_flags & RMI_DEVICE_OUTPUT_SET_REPORT) { 171 /* 172 * Talk to device by using SET_REPORT requests instead. 173 */ 174 ret = hid_hw_raw_request(hdev, report[0], report, 175 len, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT); 176 } else { 177 ret = hid_hw_output_report(hdev, (void *)report, len); 178 } 179 180 if (ret < 0) { 181 dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret); 182 return ret; 183 } 184 185 return ret; 186 } 187 188 static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr, 189 void *buf, size_t len) 190 { 191 struct rmi_data *data = container_of(xport, struct rmi_data, xport); 192 struct hid_device *hdev = data->hdev; 193 int ret; 194 int bytes_read; 195 int bytes_needed; 196 int retries; 197 int read_input_count; 198 199 mutex_lock(&data->page_mutex); 200 201 if (RMI_PAGE(addr) != data->page) { 202 ret = rmi_set_page(hdev, RMI_PAGE(addr)); 203 if (ret < 0) 204 goto exit; 205 } 206 207 for (retries = 5; retries > 0; retries--) { 208 data->writeReport[0] = RMI_READ_ADDR_REPORT_ID; 209 data->writeReport[1] = 0; /* old 1 byte read count */ 210 data->writeReport[2] = addr & 0xFF; 211 data->writeReport[3] = (addr >> 8) & 0xFF; 212 data->writeReport[4] = len & 0xFF; 213 data->writeReport[5] = (len >> 8) & 0xFF; 214 215 set_bit(RMI_READ_REQUEST_PENDING, &data->flags); 216 217 ret = rmi_write_report(hdev, data->writeReport, 218 data->output_report_size); 219 if (ret != data->output_report_size) { 220 clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); 221 dev_err(&hdev->dev, 222 "failed to write request output report (%d)\n", 223 ret); 224 goto exit; 225 } 226 227 bytes_read = 0; 228 bytes_needed = len; 229 while (bytes_read < len) { 230 if (!wait_event_timeout(data->wait, 231 test_bit(RMI_READ_DATA_PENDING, &data->flags), 232 msecs_to_jiffies(1000))) { 233 hid_warn(hdev, "%s: timeout elapsed\n", 234 __func__); 235 ret = -EAGAIN; 236 break; 237 } 238 239 read_input_count = data->readReport[1]; 240 memcpy(buf + bytes_read, &data->readReport[2], 241 read_input_count < bytes_needed ? 242 read_input_count : bytes_needed); 243 244 bytes_read += read_input_count; 245 bytes_needed -= read_input_count; 246 clear_bit(RMI_READ_DATA_PENDING, &data->flags); 247 } 248 249 if (ret >= 0) { 250 ret = 0; 251 break; 252 } 253 } 254 255 exit: 256 clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); 257 mutex_unlock(&data->page_mutex); 258 return ret; 259 } 260 261 static int rmi_hid_write_block(struct rmi_transport_dev *xport, u16 addr, 262 const void *buf, size_t len) 263 { 264 struct rmi_data *data = container_of(xport, struct rmi_data, xport); 265 struct hid_device *hdev = data->hdev; 266 int ret; 267 268 mutex_lock(&data->page_mutex); 269 270 if (RMI_PAGE(addr) != data->page) { 271 ret = rmi_set_page(hdev, RMI_PAGE(addr)); 272 if (ret < 0) 273 goto exit; 274 } 275 276 data->writeReport[0] = RMI_WRITE_REPORT_ID; 277 data->writeReport[1] = len; 278 data->writeReport[2] = addr & 0xFF; 279 data->writeReport[3] = (addr >> 8) & 0xFF; 280 memcpy(&data->writeReport[4], buf, len); 281 282 ret = rmi_write_report(hdev, data->writeReport, 283 data->output_report_size); 284 if (ret < 0) { 285 dev_err(&hdev->dev, 286 "failed to write request output report (%d)\n", 287 ret); 288 goto exit; 289 } 290 ret = 0; 291 292 exit: 293 mutex_unlock(&data->page_mutex); 294 return ret; 295 } 296 297 static int rmi_reset_attn_mode(struct hid_device *hdev) 298 { 299 struct rmi_data *data = hid_get_drvdata(hdev); 300 struct rmi_device *rmi_dev = data->xport.rmi_dev; 301 int ret; 302 303 ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); 304 if (ret) 305 return ret; 306 307 if (test_bit(RMI_STARTED, &data->flags)) 308 ret = rmi_dev->driver->reset_handler(rmi_dev); 309 310 return ret; 311 } 312 313 static void rmi_reset_work(struct work_struct *work) 314 { 315 struct rmi_data *hdata = container_of(work, struct rmi_data, 316 reset_work); 317 318 /* switch the device to RMI if we receive a generic mouse report */ 319 rmi_reset_attn_mode(hdata->hdev); 320 } 321 322 static int rmi_input_event(struct hid_device *hdev, u8 *data, int size) 323 { 324 struct rmi_data *hdata = hid_get_drvdata(hdev); 325 struct rmi_device *rmi_dev = hdata->xport.rmi_dev; 326 unsigned long flags; 327 328 if (!(test_bit(RMI_STARTED, &hdata->flags))) 329 return 0; 330 331 local_irq_save(flags); 332 333 rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2); 334 335 generic_handle_irq(hdata->rmi_irq); 336 337 local_irq_restore(flags); 338 339 return 1; 340 } 341 342 static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size) 343 { 344 struct rmi_data *hdata = hid_get_drvdata(hdev); 345 346 if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) { 347 hid_dbg(hdev, "no read request pending\n"); 348 return 0; 349 } 350 351 memcpy(hdata->readReport, data, size < hdata->input_report_size ? 352 size : hdata->input_report_size); 353 set_bit(RMI_READ_DATA_PENDING, &hdata->flags); 354 wake_up(&hdata->wait); 355 356 return 1; 357 } 358 359 static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size) 360 { 361 int valid_size = size; 362 /* 363 * On the Dell XPS 13 9333, the bus sometimes get confused and fills 364 * the report with a sentinel value "ff". Synaptics told us that such 365 * behavior does not comes from the touchpad itself, so we filter out 366 * such reports here. 367 */ 368 369 while ((data[valid_size - 1] == 0xff) && valid_size > 0) 370 valid_size--; 371 372 return valid_size; 373 } 374 375 static int rmi_raw_event(struct hid_device *hdev, 376 struct hid_report *report, u8 *data, int size) 377 { 378 struct rmi_data *hdata = hid_get_drvdata(hdev); 379 380 if (!(hdata->device_flags & RMI_DEVICE)) 381 return 0; 382 383 size = rmi_check_sanity(hdev, data, size); 384 if (size < 2) 385 return 0; 386 387 switch (data[0]) { 388 case RMI_READ_DATA_REPORT_ID: 389 return rmi_read_data_event(hdev, data, size); 390 case RMI_ATTN_REPORT_ID: 391 return rmi_input_event(hdev, data, size); 392 default: 393 return 1; 394 } 395 396 return 0; 397 } 398 399 static int rmi_event(struct hid_device *hdev, struct hid_field *field, 400 struct hid_usage *usage, __s32 value) 401 { 402 struct rmi_data *data = hid_get_drvdata(hdev); 403 404 if ((data->device_flags & RMI_DEVICE) && 405 (field->application == HID_GD_POINTER || 406 field->application == HID_GD_MOUSE)) { 407 if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) { 408 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) 409 return 0; 410 411 if ((usage->hid == HID_GD_X || usage->hid == HID_GD_Y) 412 && !value) 413 return 1; 414 } 415 416 schedule_work(&data->reset_work); 417 return 1; 418 } 419 420 return 0; 421 } 422 423 static void rmi_report(struct hid_device *hid, struct hid_report *report) 424 { 425 struct hid_field *field = report->field[0]; 426 427 if (!(hid->claimed & HID_CLAIMED_INPUT)) 428 return; 429 430 switch (report->id) { 431 case RMI_READ_DATA_REPORT_ID: 432 /* fall-through */ 433 case RMI_ATTN_REPORT_ID: 434 return; 435 } 436 437 if (field && field->hidinput && field->hidinput->input) 438 input_sync(field->hidinput->input); 439 } 440 441 #ifdef CONFIG_PM 442 static int rmi_suspend(struct hid_device *hdev, pm_message_t message) 443 { 444 struct rmi_data *data = hid_get_drvdata(hdev); 445 struct rmi_device *rmi_dev = data->xport.rmi_dev; 446 int ret; 447 448 if (!(data->device_flags & RMI_DEVICE)) 449 return 0; 450 451 ret = rmi_driver_suspend(rmi_dev, false); 452 if (ret) { 453 hid_warn(hdev, "Failed to suspend device: %d\n", ret); 454 return ret; 455 } 456 457 return 0; 458 } 459 460 static int rmi_post_resume(struct hid_device *hdev) 461 { 462 struct rmi_data *data = hid_get_drvdata(hdev); 463 struct rmi_device *rmi_dev = data->xport.rmi_dev; 464 int ret; 465 466 if (!(data->device_flags & RMI_DEVICE)) 467 return 0; 468 469 /* Make sure the HID device is ready to receive events */ 470 ret = hid_hw_open(hdev); 471 if (ret) 472 return ret; 473 474 ret = rmi_reset_attn_mode(hdev); 475 if (ret) 476 goto out; 477 478 ret = rmi_driver_resume(rmi_dev, false); 479 if (ret) { 480 hid_warn(hdev, "Failed to resume device: %d\n", ret); 481 goto out; 482 } 483 484 out: 485 hid_hw_close(hdev); 486 return ret; 487 } 488 #endif /* CONFIG_PM */ 489 490 static int rmi_hid_reset(struct rmi_transport_dev *xport, u16 reset_addr) 491 { 492 struct rmi_data *data = container_of(xport, struct rmi_data, xport); 493 struct hid_device *hdev = data->hdev; 494 495 return rmi_reset_attn_mode(hdev); 496 } 497 498 static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi) 499 { 500 struct rmi_data *data = hid_get_drvdata(hdev); 501 struct input_dev *input = hi->input; 502 int ret = 0; 503 504 if (!(data->device_flags & RMI_DEVICE)) 505 return 0; 506 507 data->xport.input = input; 508 509 hid_dbg(hdev, "Opening low level driver\n"); 510 ret = hid_hw_open(hdev); 511 if (ret) 512 return ret; 513 514 /* Allow incoming hid reports */ 515 hid_device_io_start(hdev); 516 517 ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); 518 if (ret < 0) { 519 dev_err(&hdev->dev, "failed to set rmi mode\n"); 520 goto exit; 521 } 522 523 ret = rmi_set_page(hdev, 0); 524 if (ret < 0) { 525 dev_err(&hdev->dev, "failed to set page select to 0.\n"); 526 goto exit; 527 } 528 529 ret = rmi_register_transport_device(&data->xport); 530 if (ret < 0) { 531 dev_err(&hdev->dev, "failed to register transport driver\n"); 532 goto exit; 533 } 534 535 set_bit(RMI_STARTED, &data->flags); 536 537 exit: 538 hid_device_io_stop(hdev); 539 hid_hw_close(hdev); 540 return ret; 541 } 542 543 static int rmi_input_mapping(struct hid_device *hdev, 544 struct hid_input *hi, struct hid_field *field, 545 struct hid_usage *usage, unsigned long **bit, int *max) 546 { 547 struct rmi_data *data = hid_get_drvdata(hdev); 548 549 /* 550 * we want to make HID ignore the advertised HID collection 551 * for RMI deivces 552 */ 553 if (data->device_flags & RMI_DEVICE) { 554 if ((data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) && 555 ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)) 556 return 0; 557 558 return -1; 559 } 560 561 return 0; 562 } 563 564 static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type, 565 unsigned id, struct hid_report **report) 566 { 567 int i; 568 569 *report = hdev->report_enum[type].report_id_hash[id]; 570 if (*report) { 571 for (i = 0; i < (*report)->maxfield; i++) { 572 unsigned app = (*report)->field[i]->application; 573 if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR) 574 return 1; 575 } 576 } 577 578 return 0; 579 } 580 581 static struct rmi_device_platform_data rmi_hid_pdata = { 582 .sensor_pdata = { 583 .sensor_type = rmi_sensor_touchpad, 584 .axis_align.flip_y = true, 585 .dribble = RMI_REG_STATE_ON, 586 .palm_detect = RMI_REG_STATE_OFF, 587 }, 588 }; 589 590 static const struct rmi_transport_ops hid_rmi_ops = { 591 .write_block = rmi_hid_write_block, 592 .read_block = rmi_hid_read_block, 593 .reset = rmi_hid_reset, 594 }; 595 596 static void rmi_irq_teardown(void *data) 597 { 598 struct rmi_data *hdata = data; 599 struct irq_domain *domain = hdata->domain; 600 601 if (!domain) 602 return; 603 604 irq_dispose_mapping(irq_find_mapping(domain, 0)); 605 606 irq_domain_remove(domain); 607 hdata->domain = NULL; 608 hdata->rmi_irq = 0; 609 } 610 611 static int rmi_irq_map(struct irq_domain *h, unsigned int virq, 612 irq_hw_number_t hw_irq_num) 613 { 614 irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq); 615 616 return 0; 617 } 618 619 static const struct irq_domain_ops rmi_irq_ops = { 620 .map = rmi_irq_map, 621 }; 622 623 static int rmi_setup_irq_domain(struct hid_device *hdev) 624 { 625 struct rmi_data *hdata = hid_get_drvdata(hdev); 626 int ret; 627 628 hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1, 629 &rmi_irq_ops, hdata); 630 if (!hdata->domain) 631 return -ENOMEM; 632 633 ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata); 634 if (ret) 635 return ret; 636 637 hdata->rmi_irq = irq_create_mapping(hdata->domain, 0); 638 if (hdata->rmi_irq <= 0) { 639 hid_err(hdev, "Can't allocate an IRQ\n"); 640 return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO; 641 } 642 643 return 0; 644 } 645 646 static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) 647 { 648 struct rmi_data *data = NULL; 649 int ret; 650 size_t alloc_size; 651 struct hid_report *input_report; 652 struct hid_report *output_report; 653 struct hid_report *feature_report; 654 655 data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL); 656 if (!data) 657 return -ENOMEM; 658 659 INIT_WORK(&data->reset_work, rmi_reset_work); 660 data->hdev = hdev; 661 662 hid_set_drvdata(hdev, data); 663 664 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 665 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC; 666 667 ret = hid_parse(hdev); 668 if (ret) { 669 hid_err(hdev, "parse failed\n"); 670 return ret; 671 } 672 673 if (id->driver_data) 674 data->device_flags = id->driver_data; 675 676 /* 677 * Check for the RMI specific report ids. If they are misisng 678 * simply return and let the events be processed by hid-input 679 */ 680 if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT, 681 RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) { 682 hid_dbg(hdev, "device does not have set mode feature report\n"); 683 goto start; 684 } 685 686 if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT, 687 RMI_ATTN_REPORT_ID, &input_report)) { 688 hid_dbg(hdev, "device does not have attention input report\n"); 689 goto start; 690 } 691 692 data->input_report_size = hid_report_len(input_report); 693 694 if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT, 695 RMI_WRITE_REPORT_ID, &output_report)) { 696 hid_dbg(hdev, 697 "device does not have rmi write output report\n"); 698 goto start; 699 } 700 701 data->output_report_size = hid_report_len(output_report); 702 703 data->device_flags |= RMI_DEVICE; 704 alloc_size = data->output_report_size + data->input_report_size; 705 706 data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL); 707 if (!data->writeReport) { 708 hid_err(hdev, "failed to allocate buffer for HID reports\n"); 709 return -ENOMEM; 710 } 711 712 data->readReport = data->writeReport + data->output_report_size; 713 714 init_waitqueue_head(&data->wait); 715 716 mutex_init(&data->page_mutex); 717 718 ret = rmi_setup_irq_domain(hdev); 719 if (ret) { 720 hid_err(hdev, "failed to allocate IRQ domain\n"); 721 return ret; 722 } 723 724 if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) 725 rmi_hid_pdata.f30_data.disable = true; 726 727 data->xport.dev = hdev->dev.parent; 728 data->xport.pdata = rmi_hid_pdata; 729 data->xport.pdata.irq = data->rmi_irq; 730 data->xport.proto_name = "hid"; 731 data->xport.ops = &hid_rmi_ops; 732 733 start: 734 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 735 if (ret) { 736 hid_err(hdev, "hw start failed\n"); 737 return ret; 738 } 739 740 return 0; 741 } 742 743 static void rmi_remove(struct hid_device *hdev) 744 { 745 struct rmi_data *hdata = hid_get_drvdata(hdev); 746 747 if ((hdata->device_flags & RMI_DEVICE) 748 && test_bit(RMI_STARTED, &hdata->flags)) { 749 clear_bit(RMI_STARTED, &hdata->flags); 750 cancel_work_sync(&hdata->reset_work); 751 rmi_unregister_transport_device(&hdata->xport); 752 } 753 754 hid_hw_stop(hdev); 755 } 756 757 static const struct hid_device_id rmi_id[] = { 758 { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14), 759 .driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS }, 760 { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) }, 761 { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_REZEL) }, 762 { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5), 763 .driver_data = RMI_DEVICE_OUTPUT_SET_REPORT }, 764 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) }, 765 { } 766 }; 767 MODULE_DEVICE_TABLE(hid, rmi_id); 768 769 static struct hid_driver rmi_driver = { 770 .name = "hid-rmi", 771 .id_table = rmi_id, 772 .probe = rmi_probe, 773 .remove = rmi_remove, 774 .event = rmi_event, 775 .raw_event = rmi_raw_event, 776 .report = rmi_report, 777 .input_mapping = rmi_input_mapping, 778 .input_configured = rmi_input_configured, 779 #ifdef CONFIG_PM 780 .suspend = rmi_suspend, 781 .resume = rmi_post_resume, 782 .reset_resume = rmi_post_resume, 783 #endif 784 }; 785 786 module_hid_driver(rmi_driver); 787 788 MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>"); 789 MODULE_DESCRIPTION("RMI HID driver"); 790 MODULE_LICENSE("GPL"); 791