drivers/hid/hid-rmi.c

   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");