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 dev_err(&hdev->dev, 221 "failed to write request output report (%d)\n", 222 ret); 223 goto exit; 224 } 225 226 bytes_read = 0; 227 bytes_needed = len; 228 while (bytes_read < len) { 229 if (!wait_event_timeout(data->wait, 230 test_bit(RMI_READ_DATA_PENDING, &data->flags), 231 msecs_to_jiffies(1000))) { 232 hid_warn(hdev, "%s: timeout elapsed\n", 233 __func__); 234 ret = -EAGAIN; 235 break; 236 } 237 238 read_input_count = data->readReport[1]; 239 memcpy(buf + bytes_read, &data->readReport[2], 240 read_input_count < bytes_needed ? 241 read_input_count : bytes_needed); 242 243 bytes_read += read_input_count; 244 bytes_needed -= read_input_count; 245 clear_bit(RMI_READ_DATA_PENDING, &data->flags); 246 } 247 248 if (ret >= 0) { 249 ret = 0; 250 break; 251 } 252 } 253 254 exit: 255 clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); 256 mutex_unlock(&data->page_mutex); 257 return ret; 258 } 259 260 static int rmi_hid_write_block(struct rmi_transport_dev *xport, u16 addr, 261 const void *buf, size_t len) 262 { 263 struct rmi_data *data = container_of(xport, struct rmi_data, xport); 264 struct hid_device *hdev = data->hdev; 265 int ret; 266 267 mutex_lock(&data->page_mutex); 268 269 if (RMI_PAGE(addr) != data->page) { 270 ret = rmi_set_page(hdev, RMI_PAGE(addr)); 271 if (ret < 0) 272 goto exit; 273 } 274 275 data->writeReport[0] = RMI_WRITE_REPORT_ID; 276 data->writeReport[1] = len; 277 data->writeReport[2] = addr & 0xFF; 278 data->writeReport[3] = (addr >> 8) & 0xFF; 279 memcpy(&data->writeReport[4], buf, len); 280 281 ret = rmi_write_report(hdev, data->writeReport, 282 data->output_report_size); 283 if (ret < 0) { 284 dev_err(&hdev->dev, 285 "failed to write request output report (%d)\n", 286 ret); 287 goto exit; 288 } 289 ret = 0; 290 291 exit: 292 mutex_unlock(&data->page_mutex); 293 return ret; 294 } 295 296 static int rmi_reset_attn_mode(struct hid_device *hdev) 297 { 298 struct rmi_data *data = hid_get_drvdata(hdev); 299 struct rmi_device *rmi_dev = data->xport.rmi_dev; 300 int ret; 301 302 ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); 303 if (ret) 304 return ret; 305 306 if (test_bit(RMI_STARTED, &data->flags)) 307 ret = rmi_dev->driver->reset_handler(rmi_dev); 308 309 return ret; 310 } 311 312 static void rmi_reset_work(struct work_struct *work) 313 { 314 struct rmi_data *hdata = container_of(work, struct rmi_data, 315 reset_work); 316 317 /* switch the device to RMI if we receive a generic mouse report */ 318 rmi_reset_attn_mode(hdata->hdev); 319 } 320 321 static int rmi_input_event(struct hid_device *hdev, u8 *data, int size) 322 { 323 struct rmi_data *hdata = hid_get_drvdata(hdev); 324 struct rmi_device *rmi_dev = hdata->xport.rmi_dev; 325 unsigned long flags; 326 327 if (!(test_bit(RMI_STARTED, &hdata->flags))) 328 return 0; 329 330 local_irq_save(flags); 331 332 rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2); 333 334 generic_handle_irq(hdata->rmi_irq); 335 336 local_irq_restore(flags); 337 338 return 1; 339 } 340 341 static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size) 342 { 343 struct rmi_data *hdata = hid_get_drvdata(hdev); 344 345 if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) { 346 hid_dbg(hdev, "no read request pending\n"); 347 return 0; 348 } 349 350 memcpy(hdata->readReport, data, size < hdata->input_report_size ? 351 size : hdata->input_report_size); 352 set_bit(RMI_READ_DATA_PENDING, &hdata->flags); 353 wake_up(&hdata->wait); 354 355 return 1; 356 } 357 358 static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size) 359 { 360 int valid_size = size; 361 /* 362 * On the Dell XPS 13 9333, the bus sometimes get confused and fills 363 * the report with a sentinel value "ff". Synaptics told us that such 364 * behavior does not comes from the touchpad itself, so we filter out 365 * such reports here. 366 */ 367 368 while ((data[valid_size - 1] == 0xff) && valid_size > 0) 369 valid_size--; 370 371 return valid_size; 372 } 373 374 static int rmi_raw_event(struct hid_device *hdev, 375 struct hid_report *report, u8 *data, int size) 376 { 377 struct rmi_data *hdata = hid_get_drvdata(hdev); 378 379 if (!(hdata->device_flags & RMI_DEVICE)) 380 return 0; 381 382 size = rmi_check_sanity(hdev, data, size); 383 if (size < 2) 384 return 0; 385 386 switch (data[0]) { 387 case RMI_READ_DATA_REPORT_ID: 388 return rmi_read_data_event(hdev, data, size); 389 case RMI_ATTN_REPORT_ID: 390 return rmi_input_event(hdev, data, size); 391 default: 392 return 1; 393 } 394 395 return 0; 396 } 397 398 static int rmi_event(struct hid_device *hdev, struct hid_field *field, 399 struct hid_usage *usage, __s32 value) 400 { 401 struct rmi_data *data = hid_get_drvdata(hdev); 402 403 if ((data->device_flags & RMI_DEVICE) && 404 (field->application == HID_GD_POINTER || 405 field->application == HID_GD_MOUSE)) { 406 if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) { 407 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) 408 return 0; 409 410 if ((usage->hid == HID_GD_X || usage->hid == HID_GD_Y) 411 && !value) 412 return 1; 413 } 414 415 schedule_work(&data->reset_work); 416 return 1; 417 } 418 419 return 0; 420 } 421 422 static void rmi_report(struct hid_device *hid, struct hid_report *report) 423 { 424 struct hid_field *field = report->field[0]; 425 426 if (!(hid->claimed & HID_CLAIMED_INPUT)) 427 return; 428 429 switch (report->id) { 430 case RMI_READ_DATA_REPORT_ID: 431 /* fall-through */ 432 case RMI_ATTN_REPORT_ID: 433 return; 434 } 435 436 if (field && field->hidinput && field->hidinput->input) 437 input_sync(field->hidinput->input); 438 } 439 440 #ifdef CONFIG_PM 441 static int rmi_suspend(struct hid_device *hdev, pm_message_t message) 442 { 443 struct rmi_data *data = hid_get_drvdata(hdev); 444 struct rmi_device *rmi_dev = data->xport.rmi_dev; 445 int ret; 446 447 if (!(data->device_flags & RMI_DEVICE)) 448 return 0; 449 450 ret = rmi_driver_suspend(rmi_dev, false); 451 if (ret) { 452 hid_warn(hdev, "Failed to suspend device: %d\n", ret); 453 return ret; 454 } 455 456 return 0; 457 } 458 459 static int rmi_post_resume(struct hid_device *hdev) 460 { 461 struct rmi_data *data = hid_get_drvdata(hdev); 462 struct rmi_device *rmi_dev = data->xport.rmi_dev; 463 int ret; 464 465 if (!(data->device_flags & RMI_DEVICE)) 466 return 0; 467 468 /* Make sure the HID device is ready to receive events */ 469 ret = hid_hw_open(hdev); 470 if (ret) 471 return ret; 472 473 ret = rmi_reset_attn_mode(hdev); 474 if (ret) 475 goto out; 476 477 ret = rmi_driver_resume(rmi_dev, false); 478 if (ret) { 479 hid_warn(hdev, "Failed to resume device: %d\n", ret); 480 goto out; 481 } 482 483 out: 484 hid_hw_close(hdev); 485 return ret; 486 } 487 #endif /* CONFIG_PM */ 488 489 static int rmi_hid_reset(struct rmi_transport_dev *xport, u16 reset_addr) 490 { 491 struct rmi_data *data = container_of(xport, struct rmi_data, xport); 492 struct hid_device *hdev = data->hdev; 493 494 return rmi_reset_attn_mode(hdev); 495 } 496 497 static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi) 498 { 499 struct rmi_data *data = hid_get_drvdata(hdev); 500 struct input_dev *input = hi->input; 501 int ret = 0; 502 503 if (!(data->device_flags & RMI_DEVICE)) 504 return 0; 505 506 data->xport.input = input; 507 508 hid_dbg(hdev, "Opening low level driver\n"); 509 ret = hid_hw_open(hdev); 510 if (ret) 511 return ret; 512 513 /* Allow incoming hid reports */ 514 hid_device_io_start(hdev); 515 516 ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); 517 if (ret < 0) { 518 dev_err(&hdev->dev, "failed to set rmi mode\n"); 519 goto exit; 520 } 521 522 ret = rmi_set_page(hdev, 0); 523 if (ret < 0) { 524 dev_err(&hdev->dev, "failed to set page select to 0.\n"); 525 goto exit; 526 } 527 528 ret = rmi_register_transport_device(&data->xport); 529 if (ret < 0) { 530 dev_err(&hdev->dev, "failed to register transport driver\n"); 531 goto exit; 532 } 533 534 set_bit(RMI_STARTED, &data->flags); 535 536 exit: 537 hid_device_io_stop(hdev); 538 hid_hw_close(hdev); 539 return ret; 540 } 541 542 static int rmi_input_mapping(struct hid_device *hdev, 543 struct hid_input *hi, struct hid_field *field, 544 struct hid_usage *usage, unsigned long **bit, int *max) 545 { 546 struct rmi_data *data = hid_get_drvdata(hdev); 547 548 /* 549 * we want to make HID ignore the advertised HID collection 550 * for RMI deivces 551 */ 552 if (data->device_flags & RMI_DEVICE) { 553 if ((data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) && 554 ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)) 555 return 0; 556 557 return -1; 558 } 559 560 return 0; 561 } 562 563 static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type, 564 unsigned id, struct hid_report **report) 565 { 566 int i; 567 568 *report = hdev->report_enum[type].report_id_hash[id]; 569 if (*report) { 570 for (i = 0; i < (*report)->maxfield; i++) { 571 unsigned app = (*report)->field[i]->application; 572 if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR) 573 return 1; 574 } 575 } 576 577 return 0; 578 } 579 580 static struct rmi_device_platform_data rmi_hid_pdata = { 581 .sensor_pdata = { 582 .sensor_type = rmi_sensor_touchpad, 583 .axis_align.flip_y = true, 584 .dribble = RMI_REG_STATE_ON, 585 .palm_detect = RMI_REG_STATE_OFF, 586 }, 587 }; 588 589 static const struct rmi_transport_ops hid_rmi_ops = { 590 .write_block = rmi_hid_write_block, 591 .read_block = rmi_hid_read_block, 592 .reset = rmi_hid_reset, 593 }; 594 595 static void rmi_irq_teardown(void *data) 596 { 597 struct rmi_data *hdata = data; 598 struct irq_domain *domain = hdata->domain; 599 600 if (!domain) 601 return; 602 603 irq_dispose_mapping(irq_find_mapping(domain, 0)); 604 605 irq_domain_remove(domain); 606 hdata->domain = NULL; 607 hdata->rmi_irq = 0; 608 } 609 610 static int rmi_irq_map(struct irq_domain *h, unsigned int virq, 611 irq_hw_number_t hw_irq_num) 612 { 613 irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq); 614 615 return 0; 616 } 617 618 static const struct irq_domain_ops rmi_irq_ops = { 619 .map = rmi_irq_map, 620 }; 621 622 static int rmi_setup_irq_domain(struct hid_device *hdev) 623 { 624 struct rmi_data *hdata = hid_get_drvdata(hdev); 625 int ret; 626 627 hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1, 628 &rmi_irq_ops, hdata); 629 if (!hdata->domain) 630 return -ENOMEM; 631 632 ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata); 633 if (ret) 634 return ret; 635 636 hdata->rmi_irq = irq_create_mapping(hdata->domain, 0); 637 if (hdata->rmi_irq <= 0) { 638 hid_err(hdev, "Can't allocate an IRQ\n"); 639 return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO; 640 } 641 642 return 0; 643 } 644 645 static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) 646 { 647 struct rmi_data *data = NULL; 648 int ret; 649 size_t alloc_size; 650 struct hid_report *input_report; 651 struct hid_report *output_report; 652 struct hid_report *feature_report; 653 654 data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL); 655 if (!data) 656 return -ENOMEM; 657 658 INIT_WORK(&data->reset_work, rmi_reset_work); 659 data->hdev = hdev; 660 661 hid_set_drvdata(hdev, data); 662 663 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; 664 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC; 665 666 ret = hid_parse(hdev); 667 if (ret) { 668 hid_err(hdev, "parse failed\n"); 669 return ret; 670 } 671 672 if (id->driver_data) 673 data->device_flags = id->driver_data; 674 675 /* 676 * Check for the RMI specific report ids. If they are misisng 677 * simply return and let the events be processed by hid-input 678 */ 679 if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT, 680 RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) { 681 hid_dbg(hdev, "device does not have set mode feature report\n"); 682 goto start; 683 } 684 685 if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT, 686 RMI_ATTN_REPORT_ID, &input_report)) { 687 hid_dbg(hdev, "device does not have attention input report\n"); 688 goto start; 689 } 690 691 data->input_report_size = hid_report_len(input_report); 692 693 if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT, 694 RMI_WRITE_REPORT_ID, &output_report)) { 695 hid_dbg(hdev, 696 "device does not have rmi write output report\n"); 697 goto start; 698 } 699 700 data->output_report_size = hid_report_len(output_report); 701 702 data->device_flags |= RMI_DEVICE; 703 alloc_size = data->output_report_size + data->input_report_size; 704 705 data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL); 706 if (!data->writeReport) { 707 hid_err(hdev, "failed to allocate buffer for HID reports\n"); 708 return -ENOMEM; 709 } 710 711 data->readReport = data->writeReport + data->output_report_size; 712 713 init_waitqueue_head(&data->wait); 714 715 mutex_init(&data->page_mutex); 716 717 ret = rmi_setup_irq_domain(hdev); 718 if (ret) { 719 hid_err(hdev, "failed to allocate IRQ domain\n"); 720 return ret; 721 } 722 723 if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) 724 rmi_hid_pdata.f30_data.disable = true; 725 726 data->xport.dev = hdev->dev.parent; 727 data->xport.pdata = rmi_hid_pdata; 728 data->xport.pdata.irq = data->rmi_irq; 729 data->xport.proto_name = "hid"; 730 data->xport.ops = &hid_rmi_ops; 731 732 start: 733 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 734 if (ret) { 735 hid_err(hdev, "hw start failed\n"); 736 return ret; 737 } 738 739 return 0; 740 } 741 742 static void rmi_remove(struct hid_device *hdev) 743 { 744 struct rmi_data *hdata = hid_get_drvdata(hdev); 745 746 if ((hdata->device_flags & RMI_DEVICE) 747 && test_bit(RMI_STARTED, &hdata->flags)) { 748 clear_bit(RMI_STARTED, &hdata->flags); 749 cancel_work_sync(&hdata->reset_work); 750 rmi_unregister_transport_device(&hdata->xport); 751 } 752 753 hid_hw_stop(hdev); 754 } 755 756 static const struct hid_device_id rmi_id[] = { 757 { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14), 758 .driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS }, 759 { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) }, 760 { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_REZEL) }, 761 { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5), 762 .driver_data = RMI_DEVICE_OUTPUT_SET_REPORT }, 763 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) }, 764 { } 765 }; 766 MODULE_DEVICE_TABLE(hid, rmi_id); 767 768 static struct hid_driver rmi_driver = { 769 .name = "hid-rmi", 770 .id_table = rmi_id, 771 .probe = rmi_probe, 772 .remove = rmi_remove, 773 .event = rmi_event, 774 .raw_event = rmi_raw_event, 775 .report = rmi_report, 776 .input_mapping = rmi_input_mapping, 777 .input_configured = rmi_input_configured, 778 #ifdef CONFIG_PM 779 .suspend = rmi_suspend, 780 .resume = rmi_post_resume, 781 .reset_resume = rmi_post_resume, 782 #endif 783 }; 784 785 module_hid_driver(rmi_driver); 786 787 MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>"); 788 MODULE_DESCRIPTION("RMI HID driver"); 789 MODULE_LICENSE("GPL"); 790