drivers/hid/hid-logitech-hidpp.c

   1 /*
   2  *  HIDPP protocol for Logitech Unifying receivers
   3  *
   4  *  Copyright (c) 2011 Logitech (c)
   5  *  Copyright (c) 2012-2013 Google (c)
   6  *  Copyright (c) 2013-2014 Red Hat Inc.
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU General Public License as published by the Free
  12  * Software Foundation; version 2 of the License.
  13  */
  14
  15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  16
  17 #include <linux/device.h>
  18 #include <linux/hid.h>
  19 #include <linux/module.h>
  20 #include <linux/slab.h>
  21 #include <linux/sched.h>
  22 #include <linux/kfifo.h>
  23 #include <linux/input/mt.h>
  24 #include <asm/unaligned.h>
  25 #include "hid-ids.h"
  26
  27 MODULE_LICENSE("GPL");
  28 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  29 MODULE_AUTHOR("Nestor Lopez Casado <nlopezcasad@logitech.com>");
  30
  31 static bool disable_raw_mode;
  32 module_param(disable_raw_mode, bool, 0644);
  33 MODULE_PARM_DESC(disable_raw_mode,
  34         "Disable Raw mode reporting for touchpads and keep firmware gestures.");
  35
  36 #define REPORT_ID_HIDPP_SHORT                   0x10
  37 #define REPORT_ID_HIDPP_LONG                    0x11
  38
  39 #define HIDPP_REPORT_SHORT_LENGTH               7
  40 #define HIDPP_REPORT_LONG_LENGTH                20
  41
  42 #define HIDPP_QUIRK_CLASS_WTP                   BIT(0)
  43
  44 /* bits 1..20 are reserved for classes */
  45 #define HIDPP_QUIRK_DELAYED_INIT                BIT(21)
  46 #define HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS        BIT(22)
  47 #define HIDPP_QUIRK_MULTI_INPUT                 BIT(23)
  48
  49 /*
  50  * There are two hidpp protocols in use, the first version hidpp10 is known
  51  * as register access protocol or RAP, the second version hidpp20 is known as
  52  * feature access protocol or FAP
  53  *
  54  * Most older devices (including the Unifying usb receiver) use the RAP protocol
  55  * where as most newer devices use the FAP protocol. Both protocols are
  56  * compatible with the underlying transport, which could be usb, Unifiying, or
  57  * bluetooth. The message lengths are defined by the hid vendor specific report
  58  * descriptor for the HIDPP_SHORT report type (total message lenth 7 bytes) and
  59  * the HIDPP_LONG report type (total message length 20 bytes)
  60  *
  61  * The RAP protocol uses both report types, whereas the FAP only uses HIDPP_LONG
  62  * messages. The Unifying receiver itself responds to RAP messages (device index
  63  * is 0xFF for the receiver), and all messages (short or long) with a device
  64  * index between 1 and 6 are passed untouched to the corresponding paired
  65  * Unifying device.
  66  *
  67  * The paired device can be RAP or FAP, it will receive the message untouched
  68  * from the Unifiying receiver.
  69  */
  70
  71 struct fap {
  72         u8 feature_index;
  73         u8 funcindex_clientid;
  74         u8 params[HIDPP_REPORT_LONG_LENGTH - 4U];
  75 };
  76
  77 struct rap {
  78         u8 sub_id;
  79         u8 reg_address;
  80         u8 params[HIDPP_REPORT_LONG_LENGTH - 4U];
  81 };
  82
  83 struct hidpp_report {
  84         u8 report_id;
  85         u8 device_index;
  86         union {
  87                 struct fap fap;
  88                 struct rap rap;
  89                 u8 rawbytes[sizeof(struct fap)];
  90         };
  91 } __packed;
  92
  93 struct hidpp_device {
  94         struct hid_device *hid_dev;
  95         struct mutex send_mutex;
  96         void *send_receive_buf;
  97         char *name;             /* will never be NULL and should not be freed */
  98         wait_queue_head_t wait;
  99         bool answer_available;
 100         u8 protocol_major;
 101         u8 protocol_minor;
 102
 103         void *private_data;
 104
 105         struct work_struct work;
 106         struct kfifo delayed_work_fifo;
 107         atomic_t connected;
 108         struct input_dev *delayed_input;
 109
 110         unsigned long quirks;
 111 };
 112
 113
 114 /* HID++ 1.0 error codes */
 115 #define HIDPP_ERROR                             0x8f
 116 #define HIDPP_ERROR_SUCCESS                     0x00
 117 #define HIDPP_ERROR_INVALID_SUBID               0x01
 118 #define HIDPP_ERROR_INVALID_ADRESS              0x02
 119 #define HIDPP_ERROR_INVALID_VALUE               0x03
 120 #define HIDPP_ERROR_CONNECT_FAIL                0x04
 121 #define HIDPP_ERROR_TOO_MANY_DEVICES            0x05
 122 #define HIDPP_ERROR_ALREADY_EXISTS              0x06
 123 #define HIDPP_ERROR_BUSY                        0x07
 124 #define HIDPP_ERROR_UNKNOWN_DEVICE              0x08
 125 #define HIDPP_ERROR_RESOURCE_ERROR              0x09
 126 #define HIDPP_ERROR_REQUEST_UNAVAILABLE         0x0a
 127 #define HIDPP_ERROR_INVALID_PARAM_VALUE         0x0b
 128 #define HIDPP_ERROR_WRONG_PIN_CODE              0x0c
 129 /* HID++ 2.0 error codes */
 130 #define HIDPP20_ERROR                           0xff
 131
 132 static void hidpp_connect_event(struct hidpp_device *hidpp_dev);
 133
 134 static int __hidpp_send_report(struct hid_device *hdev,
 135                                 struct hidpp_report *hidpp_report)
 136 {
 137         int fields_count, ret;
 138
 139         switch (hidpp_report->report_id) {
 140         case REPORT_ID_HIDPP_SHORT:
 141                 fields_count = HIDPP_REPORT_SHORT_LENGTH;
 142                 break;
 143         case REPORT_ID_HIDPP_LONG:
 144                 fields_count = HIDPP_REPORT_LONG_LENGTH;
 145                 break;
 146         default:
 147                 return -ENODEV;
 148         }
 149
 150         /*
 151          * set the device_index as the receiver, it will be overwritten by
 152          * hid_hw_request if needed
 153          */
 154         hidpp_report->device_index = 0xff;
 155
 156         ret = hid_hw_raw_request(hdev, hidpp_report->report_id,
 157                 (u8 *)hidpp_report, fields_count, HID_OUTPUT_REPORT,
 158                 HID_REQ_SET_REPORT);
 159
 160         return ret == fields_count ? 0 : -1;
 161 }
 162
 163 /**
 164  * hidpp_send_message_sync() returns 0 in case of success, and something else
 165  * in case of a failure.
 166  * - If ' something else' is positive, that means that an error has been raised
 167  *   by the protocol itself.
 168  * - If ' something else' is negative, that means that we had a classic error
 169  *   (-ENOMEM, -EPIPE, etc...)
 170  */
 171 static int hidpp_send_message_sync(struct hidpp_device *hidpp,
 172         struct hidpp_report *message,
 173         struct hidpp_report *response)
 174 {
 175         int ret;
 176
 177         mutex_lock(&hidpp->send_mutex);
 178
 179         hidpp->send_receive_buf = response;
 180         hidpp->answer_available = false;
 181
 182         /*
 183          * So that we can later validate the answer when it arrives
 184          * in hidpp_raw_event
 185          */
 186         *response = *message;
 187
 188         ret = __hidpp_send_report(hidpp->hid_dev, message);
 189
 190         if (ret) {
 191                 dbg_hid("__hidpp_send_report returned err: %d\n", ret);
 192                 memset(response, 0, sizeof(struct hidpp_report));
 193                 goto exit;
 194         }
 195
 196         if (!wait_event_timeout(hidpp->wait, hidpp->answer_available,
 197                                 5*HZ)) {
 198                 dbg_hid("%s:timeout waiting for response\n", __func__);
 199                 memset(response, 0, sizeof(struct hidpp_report));
 200                 ret = -ETIMEDOUT;
 201         }
 202
 203         if (response->report_id == REPORT_ID_HIDPP_SHORT &&
 204             response->rap.sub_id == HIDPP_ERROR) {
 205                 ret = response->rap.params[1];
 206                 dbg_hid("%s:got hidpp error %02X\n", __func__, ret);
 207                 goto exit;
 208         }
 209
 210         if (response->report_id == REPORT_ID_HIDPP_LONG &&
 211             response->fap.feature_index == HIDPP20_ERROR) {
 212                 ret = response->fap.params[1];
 213                 dbg_hid("%s:got hidpp 2.0 error %02X\n", __func__, ret);
 214                 goto exit;
 215         }
 216
 217 exit:
 218         mutex_unlock(&hidpp->send_mutex);
 219         return ret;
 220
 221 }
 222
 223 static int hidpp_send_fap_command_sync(struct hidpp_device *hidpp,
 224         u8 feat_index, u8 funcindex_clientid, u8 *params, int param_count,
 225         struct hidpp_report *response)
 226 {
 227         struct hidpp_report *message;
 228         int ret;
 229
 230         if (param_count > sizeof(message->fap.params))
 231                 return -EINVAL;
 232
 233         message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
 234         if (!message)
 235                 return -ENOMEM;
 236         message->report_id = REPORT_ID_HIDPP_LONG;
 237         message->fap.feature_index = feat_index;
 238         message->fap.funcindex_clientid = funcindex_clientid;
 239         memcpy(&message->fap.params, params, param_count);
 240
 241         ret = hidpp_send_message_sync(hidpp, message, response);
 242         kfree(message);
 243         return ret;
 244 }
 245
 246 static int hidpp_send_rap_command_sync(struct hidpp_device *hidpp_dev,
 247         u8 report_id, u8 sub_id, u8 reg_address, u8 *params, int param_count,
 248         struct hidpp_report *response)
 249 {
 250         struct hidpp_report *message;
 251         int ret;
 252
 253         if ((report_id != REPORT_ID_HIDPP_SHORT) &&
 254             (report_id != REPORT_ID_HIDPP_LONG))
 255                 return -EINVAL;
 256
 257         if (param_count > sizeof(message->rap.params))
 258                 return -EINVAL;
 259
 260         message = kzalloc(sizeof(struct hidpp_report), GFP_KERNEL);
 261         if (!message)
 262                 return -ENOMEM;
 263         message->report_id = report_id;
 264         message->rap.sub_id = sub_id;
 265         message->rap.reg_address = reg_address;
 266         memcpy(&message->rap.params, params, param_count);
 267
 268         ret = hidpp_send_message_sync(hidpp_dev, message, response);
 269         kfree(message);
 270         return ret;
 271 }
 272
 273 static void delayed_work_cb(struct work_struct *work)
 274 {
 275         struct hidpp_device *hidpp = container_of(work, struct hidpp_device,
 276                                                         work);
 277         hidpp_connect_event(hidpp);
 278 }
 279
 280 static inline bool hidpp_match_answer(struct hidpp_report *question,
 281                 struct hidpp_report *answer)
 282 {
 283         return (answer->fap.feature_index == question->fap.feature_index) &&
 284            (answer->fap.funcindex_clientid == question->fap.funcindex_clientid);
 285 }
 286
 287 static inline bool hidpp_match_error(struct hidpp_report *question,
 288                 struct hidpp_report *answer)
 289 {
 290         return ((answer->rap.sub_id == HIDPP_ERROR) ||
 291             (answer->fap.feature_index == HIDPP20_ERROR)) &&
 292             (answer->fap.funcindex_clientid == question->fap.feature_index) &&
 293             (answer->fap.params[0] == question->fap.funcindex_clientid);
 294 }
 295
 296 static inline bool hidpp_report_is_connect_event(struct hidpp_report *report)
 297 {
 298         return (report->report_id == REPORT_ID_HIDPP_SHORT) &&
 299                 (report->rap.sub_id == 0x41);
 300 }
 301
 302 /**
 303  * hidpp_prefix_name() prefixes the current given name with "Logitech ".
 304  */
 305 static void hidpp_prefix_name(char **name, int name_length)
 306 {
 307 #define PREFIX_LENGTH 9 /* "Logitech " */
 308
 309         int new_length;
 310         char *new_name;
 311
 312         if (name_length > PREFIX_LENGTH &&
 313             strncmp(*name, "Logitech ", PREFIX_LENGTH) == 0)
 314                 /* The prefix has is already in the name */
 315                 return;
 316
 317         new_length = PREFIX_LENGTH + name_length;
 318         new_name = kzalloc(new_length, GFP_KERNEL);
 319         if (!new_name)
 320                 return;
 321
 322         snprintf(new_name, new_length, "Logitech %s", *name);
 323
 324         kfree(*name);
 325
 326         *name = new_name;
 327 }
 328
 329 /* -------------------------------------------------------------------------- */
 330 /* HIDP++ 1.0 commands                                                        */
 331 /* -------------------------------------------------------------------------- */
 332
 333 #define HIDPP_SET_REGISTER                              0x80
 334 #define HIDPP_GET_REGISTER                              0x81
 335 #define HIDPP_SET_LONG_REGISTER                         0x82
 336 #define HIDPP_GET_LONG_REGISTER                         0x83
 337
 338 #define HIDPP_REG_PAIRING_INFORMATION                   0xB5
 339 #define DEVICE_NAME                                     0x40
 340
 341 static char *hidpp_get_unifying_name(struct hidpp_device *hidpp_dev)
 342 {
 343         struct hidpp_report response;
 344         int ret;
 345         /* hid-logitech-dj is in charge of setting the right device index */
 346         u8 params[1] = { DEVICE_NAME };
 347         char *name;
 348         int len;
 349
 350         ret = hidpp_send_rap_command_sync(hidpp_dev,
 351                                         REPORT_ID_HIDPP_SHORT,
 352                                         HIDPP_GET_LONG_REGISTER,
 353                                         HIDPP_REG_PAIRING_INFORMATION,
 354                                         params, 1, &response);
 355         if (ret)
 356                 return NULL;
 357
 358         len = response.rap.params[1];
 359
 360         if (2 + len > sizeof(response.rap.params))
 361                 return NULL;
 362
 363         name = kzalloc(len + 1, GFP_KERNEL);
 364         if (!name)
 365                 return NULL;
 366
 367         memcpy(name, &response.rap.params[2], len);
 368
 369         /* include the terminating '\0' */
 370         hidpp_prefix_name(&name, len + 1);
 371
 372         return name;
 373 }
 374
 375 /* -------------------------------------------------------------------------- */
 376 /* 0x0000: Root                                                               */
 377 /* -------------------------------------------------------------------------- */
 378
 379 #define HIDPP_PAGE_ROOT                                 0x0000
 380 #define HIDPP_PAGE_ROOT_IDX                             0x00
 381
 382 #define CMD_ROOT_GET_FEATURE                            0x01
 383 #define CMD_ROOT_GET_PROTOCOL_VERSION                   0x11
 384
 385 static int hidpp_root_get_feature(struct hidpp_device *hidpp, u16 feature,
 386         u8 *feature_index, u8 *feature_type)
 387 {
 388         struct hidpp_report response;
 389         int ret;
 390         u8 params[2] = { feature >> 8, feature & 0x00FF };
 391
 392         ret = hidpp_send_fap_command_sync(hidpp,
 393                         HIDPP_PAGE_ROOT_IDX,
 394                         CMD_ROOT_GET_FEATURE,
 395                         params, 2, &response);
 396         if (ret)
 397                 return ret;
 398
 399         *feature_index = response.fap.params[0];
 400         *feature_type = response.fap.params[1];
 401
 402         return ret;
 403 }
 404
 405 static int hidpp_root_get_protocol_version(struct hidpp_device *hidpp)
 406 {
 407         struct hidpp_report response;
 408         int ret;
 409
 410         ret = hidpp_send_fap_command_sync(hidpp,
 411                         HIDPP_PAGE_ROOT_IDX,
 412                         CMD_ROOT_GET_PROTOCOL_VERSION,
 413                         NULL, 0, &response);
 414
 415         if (ret == HIDPP_ERROR_INVALID_SUBID) {
 416                 hidpp->protocol_major = 1;
 417                 hidpp->protocol_minor = 0;
 418                 return 0;
 419         }
 420
 421         /* the device might not be connected */
 422         if (ret == HIDPP_ERROR_RESOURCE_ERROR)
 423                 return -EIO;
 424
 425         if (ret > 0) {
 426                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 427                         __func__, ret);
 428                 return -EPROTO;
 429         }
 430         if (ret)
 431                 return ret;
 432
 433         hidpp->protocol_major = response.fap.params[0];
 434         hidpp->protocol_minor = response.fap.params[1];
 435
 436         return ret;
 437 }
 438
 439 static bool hidpp_is_connected(struct hidpp_device *hidpp)
 440 {
 441         int ret;
 442
 443         ret = hidpp_root_get_protocol_version(hidpp);
 444         if (!ret)
 445                 hid_dbg(hidpp->hid_dev, "HID++ %u.%u device connected.\n",
 446                         hidpp->protocol_major, hidpp->protocol_minor);
 447         return ret == 0;
 448 }
 449
 450 /* -------------------------------------------------------------------------- */
 451 /* 0x0005: GetDeviceNameType                                                  */
 452 /* -------------------------------------------------------------------------- */
 453
 454 #define HIDPP_PAGE_GET_DEVICE_NAME_TYPE                 0x0005
 455
 456 #define CMD_GET_DEVICE_NAME_TYPE_GET_COUNT              0x01
 457 #define CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME        0x11
 458 #define CMD_GET_DEVICE_NAME_TYPE_GET_TYPE               0x21
 459
 460 static int hidpp_devicenametype_get_count(struct hidpp_device *hidpp,
 461         u8 feature_index, u8 *nameLength)
 462 {
 463         struct hidpp_report response;
 464         int ret;
 465
 466         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
 467                 CMD_GET_DEVICE_NAME_TYPE_GET_COUNT, NULL, 0, &response);
 468
 469         if (ret > 0) {
 470                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 471                         __func__, ret);
 472                 return -EPROTO;
 473         }
 474         if (ret)
 475                 return ret;
 476
 477         *nameLength = response.fap.params[0];
 478
 479         return ret;
 480 }
 481
 482 static int hidpp_devicenametype_get_device_name(struct hidpp_device *hidpp,
 483         u8 feature_index, u8 char_index, char *device_name, int len_buf)
 484 {
 485         struct hidpp_report response;
 486         int ret, i;
 487         int count;
 488
 489         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
 490                 CMD_GET_DEVICE_NAME_TYPE_GET_DEVICE_NAME, &char_index, 1,
 491                 &response);
 492
 493         if (ret > 0) {
 494                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 495                         __func__, ret);
 496                 return -EPROTO;
 497         }
 498         if (ret)
 499                 return ret;
 500
 501         if (response.report_id == REPORT_ID_HIDPP_LONG)
 502                 count = HIDPP_REPORT_LONG_LENGTH - 4;
 503         else
 504                 count = HIDPP_REPORT_SHORT_LENGTH - 4;
 505
 506         if (len_buf < count)
 507                 count = len_buf;
 508
 509         for (i = 0; i < count; i++)
 510                 device_name[i] = response.fap.params[i];
 511
 512         return count;
 513 }
 514
 515 static char *hidpp_get_device_name(struct hidpp_device *hidpp)
 516 {
 517         u8 feature_type;
 518         u8 feature_index;
 519         u8 __name_length;
 520         char *name;
 521         unsigned index = 0;
 522         int ret;
 523
 524         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_GET_DEVICE_NAME_TYPE,
 525                 &feature_index, &feature_type);
 526         if (ret)
 527                 return NULL;
 528
 529         ret = hidpp_devicenametype_get_count(hidpp, feature_index,
 530                 &__name_length);
 531         if (ret)
 532                 return NULL;
 533
 534         name = kzalloc(__name_length + 1, GFP_KERNEL);
 535         if (!name)
 536                 return NULL;
 537
 538         while (index < __name_length) {
 539                 ret = hidpp_devicenametype_get_device_name(hidpp,
 540                         feature_index, index, name + index,
 541                         __name_length - index);
 542                 if (ret <= 0) {
 543                         kfree(name);
 544                         return NULL;
 545                 }
 546                 index += ret;
 547         }
 548
 549         /* include the terminating '\0' */
 550         hidpp_prefix_name(&name, __name_length + 1);
 551
 552         return name;
 553 }
 554
 555 /* -------------------------------------------------------------------------- */
 556 /* 0x6100: TouchPadRawXY                                                      */
 557 /* -------------------------------------------------------------------------- */
 558
 559 #define HIDPP_PAGE_TOUCHPAD_RAW_XY                      0x6100
 560
 561 #define CMD_TOUCHPAD_GET_RAW_INFO                       0x01
 562 #define CMD_TOUCHPAD_SET_RAW_REPORT_STATE               0x21
 563
 564 #define EVENT_TOUCHPAD_RAW_XY                           0x00
 565
 566 #define TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT               0x01
 567 #define TOUCHPAD_RAW_XY_ORIGIN_UPPER_LEFT               0x03
 568
 569 struct hidpp_touchpad_raw_info {
 570         u16 x_size;
 571         u16 y_size;
 572         u8 z_range;
 573         u8 area_range;
 574         u8 timestamp_unit;
 575         u8 maxcontacts;
 576         u8 origin;
 577         u16 res;
 578 };
 579
 580 struct hidpp_touchpad_raw_xy_finger {
 581         u8 contact_type;
 582         u8 contact_status;
 583         u16 x;
 584         u16 y;
 585         u8 z;
 586         u8 area;
 587         u8 finger_id;
 588 };
 589
 590 struct hidpp_touchpad_raw_xy {
 591         u16 timestamp;
 592         struct hidpp_touchpad_raw_xy_finger fingers[2];
 593         u8 spurious_flag;
 594         u8 end_of_frame;
 595         u8 finger_count;
 596         u8 button;
 597 };
 598
 599 static int hidpp_touchpad_get_raw_info(struct hidpp_device *hidpp,
 600         u8 feature_index, struct hidpp_touchpad_raw_info *raw_info)
 601 {
 602         struct hidpp_report response;
 603         int ret;
 604         u8 *params = (u8 *)response.fap.params;
 605
 606         ret = hidpp_send_fap_command_sync(hidpp, feature_index,
 607                 CMD_TOUCHPAD_GET_RAW_INFO, NULL, 0, &response);
 608
 609         if (ret > 0) {
 610                 hid_err(hidpp->hid_dev, "%s: received protocol error 0x%02x\n",
 611                         __func__, ret);
 612                 return -EPROTO;
 613         }
 614         if (ret)
 615                 return ret;
 616
 617         raw_info->x_size = get_unaligned_be16(&params[0]);
 618         raw_info->y_size = get_unaligned_be16(&params[2]);
 619         raw_info->z_range = params[4];
 620         raw_info->area_range = params[5];
 621         raw_info->maxcontacts = params[7];
 622         raw_info->origin = params[8];
 623         /* res is given in unit per inch */
 624         raw_info->res = get_unaligned_be16(&params[13]) * 2 / 51;
 625
 626         return ret;
 627 }
 628
 629 static int hidpp_touchpad_set_raw_report_state(struct hidpp_device *hidpp_dev,
 630                 u8 feature_index, bool send_raw_reports,
 631                 bool sensor_enhanced_settings)
 632 {
 633         struct hidpp_report response;
 634
 635         /*
 636          * Params:
 637          *   bit 0 - enable raw
 638          *   bit 1 - 16bit Z, no area
 639          *   bit 2 - enhanced sensitivity
 640          *   bit 3 - width, height (4 bits each) instead of area
 641          *   bit 4 - send raw + gestures (degrades smoothness)
 642          *   remaining bits - reserved
 643          */
 644         u8 params = send_raw_reports | (sensor_enhanced_settings << 2);
 645
 646         return hidpp_send_fap_command_sync(hidpp_dev, feature_index,
 647                 CMD_TOUCHPAD_SET_RAW_REPORT_STATE, &params, 1, &response);
 648 }
 649
 650 static void hidpp_touchpad_touch_event(u8 *data,
 651         struct hidpp_touchpad_raw_xy_finger *finger)
 652 {
 653         u8 x_m = data[0] << 2;
 654         u8 y_m = data[2] << 2;
 655
 656         finger->x = x_m << 6 | data[1];
 657         finger->y = y_m << 6 | data[3];
 658
 659         finger->contact_type = data[0] >> 6;
 660         finger->contact_status = data[2] >> 6;
 661
 662         finger->z = data[4];
 663         finger->area = data[5];
 664         finger->finger_id = data[6] >> 4;
 665 }
 666
 667 static void hidpp_touchpad_raw_xy_event(struct hidpp_device *hidpp_dev,
 668                 u8 *data, struct hidpp_touchpad_raw_xy *raw_xy)
 669 {
 670         memset(raw_xy, 0, sizeof(struct hidpp_touchpad_raw_xy));
 671         raw_xy->end_of_frame = data[8] & 0x01;
 672         raw_xy->spurious_flag = (data[8] >> 1) & 0x01;
 673         raw_xy->finger_count = data[15] & 0x0f;
 674         raw_xy->button = (data[8] >> 2) & 0x01;
 675
 676         if (raw_xy->finger_count) {
 677                 hidpp_touchpad_touch_event(&data[2], &raw_xy->fingers[0]);
 678                 hidpp_touchpad_touch_event(&data[9], &raw_xy->fingers[1]);
 679         }
 680 }
 681
 682 /* ************************************************************************** */
 683 /*                                                                            */
 684 /* Device Support                                                             */
 685 /*                                                                            */
 686 /* ************************************************************************** */
 687
 688 /* -------------------------------------------------------------------------- */
 689 /* Touchpad HID++ devices                                                     */
 690 /* -------------------------------------------------------------------------- */
 691
 692 #define WTP_MANUAL_RESOLUTION                           39
 693
 694 struct wtp_data {
 695         struct input_dev *input;
 696         u16 x_size, y_size;
 697         u8 finger_count;
 698         u8 mt_feature_index;
 699         u8 button_feature_index;
 700         u8 maxcontacts;
 701         bool flip_y;
 702         unsigned int resolution;
 703 };
 704
 705 static int wtp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 706                 struct hid_field *field, struct hid_usage *usage,
 707                 unsigned long **bit, int *max)
 708 {
 709         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 710
 711         if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) &&
 712             (field->application == HID_GD_KEYBOARD))
 713                 return 0;
 714
 715         return -1;
 716 }
 717
 718 static void wtp_populate_input(struct hidpp_device *hidpp,
 719                 struct input_dev *input_dev, bool origin_is_hid_core)
 720 {
 721         struct wtp_data *wd = hidpp->private_data;
 722
 723         if ((hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT) && origin_is_hid_core)
 724                 /* this is the generic hid-input call */
 725                 return;
 726
 727         __set_bit(EV_ABS, input_dev->evbit);
 728         __set_bit(EV_KEY, input_dev->evbit);
 729         __clear_bit(EV_REL, input_dev->evbit);
 730         __clear_bit(EV_LED, input_dev->evbit);
 731
 732         input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0, wd->x_size, 0, 0);
 733         input_abs_set_res(input_dev, ABS_MT_POSITION_X, wd->resolution);
 734         input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0, wd->y_size, 0, 0);
 735         input_abs_set_res(input_dev, ABS_MT_POSITION_Y, wd->resolution);
 736
 737         /* Max pressure is not given by the devices, pick one */
 738         input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 50, 0, 0);
 739
 740         input_set_capability(input_dev, EV_KEY, BTN_LEFT);
 741
 742         if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS)
 743                 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
 744         else
 745                 __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
 746
 747         input_mt_init_slots(input_dev, wd->maxcontacts, INPUT_MT_POINTER |
 748                 INPUT_MT_DROP_UNUSED);
 749
 750         wd->input = input_dev;
 751 }
 752
 753 static void wtp_touch_event(struct wtp_data *wd,
 754         struct hidpp_touchpad_raw_xy_finger *touch_report)
 755 {
 756         int slot;
 757
 758         if (!touch_report->finger_id || touch_report->contact_type)
 759                 /* no actual data */
 760                 return;
 761
 762         slot = input_mt_get_slot_by_key(wd->input, touch_report->finger_id);
 763
 764         input_mt_slot(wd->input, slot);
 765         input_mt_report_slot_state(wd->input, MT_TOOL_FINGER,
 766                                         touch_report->contact_status);
 767         if (touch_report->contact_status) {
 768                 input_event(wd->input, EV_ABS, ABS_MT_POSITION_X,
 769                                 touch_report->x);
 770                 input_event(wd->input, EV_ABS, ABS_MT_POSITION_Y,
 771                                 wd->flip_y ? wd->y_size - touch_report->y :
 772                                              touch_report->y);
 773                 input_event(wd->input, EV_ABS, ABS_MT_PRESSURE,
 774                                 touch_report->area);
 775         }
 776 }
 777
 778 static void wtp_send_raw_xy_event(struct hidpp_device *hidpp,
 779                 struct hidpp_touchpad_raw_xy *raw)
 780 {
 781         struct wtp_data *wd = hidpp->private_data;
 782         int i;
 783
 784         for (i = 0; i < 2; i++)
 785                 wtp_touch_event(wd, &(raw->fingers[i]));
 786
 787         if (raw->end_of_frame &&
 788             !(hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS))
 789                 input_event(wd->input, EV_KEY, BTN_LEFT, raw->button);
 790
 791         if (raw->end_of_frame || raw->finger_count <= 2) {
 792                 input_mt_sync_frame(wd->input);
 793                 input_sync(wd->input);
 794         }
 795 }
 796
 797 static int wtp_mouse_raw_xy_event(struct hidpp_device *hidpp, u8 *data)
 798 {
 799         struct wtp_data *wd = hidpp->private_data;
 800         u8 c1_area = ((data[7] & 0xf) * (data[7] & 0xf) +
 801                       (data[7] >> 4) * (data[7] >> 4)) / 2;
 802         u8 c2_area = ((data[13] & 0xf) * (data[13] & 0xf) +
 803                       (data[13] >> 4) * (data[13] >> 4)) / 2;
 804         struct hidpp_touchpad_raw_xy raw = {
 805                 .timestamp = data[1],
 806                 .fingers = {
 807                         {
 808                                 .contact_type = 0,
 809                                 .contact_status = !!data[7],
 810                                 .x = get_unaligned_le16(&data[3]),
 811                                 .y = get_unaligned_le16(&data[5]),
 812                                 .z = c1_area,
 813                                 .area = c1_area,
 814                                 .finger_id = data[2],
 815                         }, {
 816                                 .contact_type = 0,
 817                                 .contact_status = !!data[13],
 818                                 .x = get_unaligned_le16(&data[9]),
 819                                 .y = get_unaligned_le16(&data[11]),
 820                                 .z = c2_area,
 821                                 .area = c2_area,
 822                                 .finger_id = data[8],
 823                         }
 824                 },
 825                 .finger_count = wd->maxcontacts,
 826                 .spurious_flag = 0,
 827                 .end_of_frame = (data[0] >> 7) == 0,
 828                 .button = data[0] & 0x01,
 829         };
 830
 831         wtp_send_raw_xy_event(hidpp, &raw);
 832
 833         return 1;
 834 }
 835
 836 static int wtp_raw_event(struct hid_device *hdev, u8 *data, int size)
 837 {
 838         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 839         struct wtp_data *wd = hidpp->private_data;
 840         struct hidpp_report *report = (struct hidpp_report *)data;
 841         struct hidpp_touchpad_raw_xy raw;
 842
 843         if (!wd || !wd->input)
 844                 return 1;
 845
 846         switch (data[0]) {
 847         case 0x02:
 848                 if (size < 2) {
 849                         hid_err(hdev, "Received HID report of bad size (%d)",
 850                                 size);
 851                         return 1;
 852                 }
 853                 if (hidpp->quirks & HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS) {
 854                         input_event(wd->input, EV_KEY, BTN_LEFT,
 855                                         !!(data[1] & 0x01));
 856                         input_event(wd->input, EV_KEY, BTN_RIGHT,
 857                                         !!(data[1] & 0x02));
 858                         input_sync(wd->input);
 859                         return 0;
 860                 } else {
 861                         if (size < 21)
 862                                 return 1;
 863                         return wtp_mouse_raw_xy_event(hidpp, &data[7]);
 864                 }
 865         case REPORT_ID_HIDPP_LONG:
 866                 /* size is already checked in hidpp_raw_event. */
 867                 if ((report->fap.feature_index != wd->mt_feature_index) ||
 868                     (report->fap.funcindex_clientid != EVENT_TOUCHPAD_RAW_XY))
 869                         return 1;
 870                 hidpp_touchpad_raw_xy_event(hidpp, data + 4, &raw);
 871
 872                 wtp_send_raw_xy_event(hidpp, &raw);
 873                 return 0;
 874         }
 875
 876         return 0;
 877 }
 878
 879 static int wtp_get_config(struct hidpp_device *hidpp)
 880 {
 881         struct wtp_data *wd = hidpp->private_data;
 882         struct hidpp_touchpad_raw_info raw_info = {0};
 883         u8 feature_type;
 884         int ret;
 885
 886         ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_TOUCHPAD_RAW_XY,
 887                 &wd->mt_feature_index, &feature_type);
 888         if (ret)
 889                 /* means that the device is not powered up */
 890                 return ret;
 891
 892         ret = hidpp_touchpad_get_raw_info(hidpp, wd->mt_feature_index,
 893                 &raw_info);
 894         if (ret)
 895                 return ret;
 896
 897         wd->x_size = raw_info.x_size;
 898         wd->y_size = raw_info.y_size;
 899         wd->maxcontacts = raw_info.maxcontacts;
 900         wd->flip_y = raw_info.origin == TOUCHPAD_RAW_XY_ORIGIN_LOWER_LEFT;
 901         wd->resolution = raw_info.res;
 902         if (!wd->resolution)
 903                 wd->resolution = WTP_MANUAL_RESOLUTION;
 904
 905         return 0;
 906 }
 907
 908 static int wtp_allocate(struct hid_device *hdev, const struct hid_device_id *id)
 909 {
 910         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 911         struct wtp_data *wd;
 912
 913         wd = devm_kzalloc(&hdev->dev, sizeof(struct wtp_data),
 914                         GFP_KERNEL);
 915         if (!wd)
 916                 return -ENOMEM;
 917
 918         hidpp->private_data = wd;
 919
 920         return 0;
 921 };
 922
 923 static int wtp_connect(struct hid_device *hdev, bool connected)
 924 {
 925         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 926         struct wtp_data *wd = hidpp->private_data;
 927         int ret;
 928
 929         if (!connected)
 930                 return 0;
 931
 932         if (!wd->x_size) {
 933                 ret = wtp_get_config(hidpp);
 934                 if (ret) {
 935                         hid_err(hdev, "Can not get wtp config: %d\n", ret);
 936                         return ret;
 937                 }
 938         }
 939
 940         return hidpp_touchpad_set_raw_report_state(hidpp, wd->mt_feature_index,
 941                         true, true);
 942 }
 943
 944 /* -------------------------------------------------------------------------- */
 945 /* Generic HID++ devices                                                      */
 946 /* -------------------------------------------------------------------------- */
 947
 948 static int hidpp_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 949                 struct hid_field *field, struct hid_usage *usage,
 950                 unsigned long **bit, int *max)
 951 {
 952         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 953
 954         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
 955                 return wtp_input_mapping(hdev, hi, field, usage, bit, max);
 956
 957         return 0;
 958 }
 959
 960 static void hidpp_populate_input(struct hidpp_device *hidpp,
 961                 struct input_dev *input, bool origin_is_hid_core)
 962 {
 963         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
 964                 wtp_populate_input(hidpp, input, origin_is_hid_core);
 965 }
 966
 967 static void hidpp_input_configured(struct hid_device *hdev,
 968                                 struct hid_input *hidinput)
 969 {
 970         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
 971         struct input_dev *input = hidinput->input;
 972
 973         hidpp_populate_input(hidpp, input, true);
 974 }
 975
 976 static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
 977                 int size)
 978 {
 979         struct hidpp_report *question = hidpp->send_receive_buf;
 980         struct hidpp_report *answer = hidpp->send_receive_buf;
 981         struct hidpp_report *report = (struct hidpp_report *)data;
 982
 983         /*
 984          * If the mutex is locked then we have a pending answer from a
 985          * previously sent command.
 986          */
 987         if (unlikely(mutex_is_locked(&hidpp->send_mutex))) {
 988                 /*
 989                  * Check for a correct hidpp20 answer or the corresponding
 990                  * error
 991                  */
 992                 if (hidpp_match_answer(question, report) ||
 993                                 hidpp_match_error(question, report)) {
 994                         *answer = *report;
 995                         hidpp->answer_available = true;
 996                         wake_up(&hidpp->wait);
 997                         /*
 998                          * This was an answer to a command that this driver sent
 999                          * We return 1 to hid-core to avoid forwarding the
1000                          * command upstream as it has been treated by the driver
1001                          */
1002
1003                         return 1;
1004                 }
1005         }
1006
1007         if (unlikely(hidpp_report_is_connect_event(report))) {
1008                 atomic_set(&hidpp->connected,
1009                                 !(report->rap.params[0] & (1 << 6)));
1010                 if ((hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT) &&
1011                     (schedule_work(&hidpp->work) == 0))
1012                         dbg_hid("%s: connect event already queued\n", __func__);
1013                 return 1;
1014         }
1015
1016         return 0;
1017 }
1018
1019 static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
1020                 u8 *data, int size)
1021 {
1022         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1023         int ret = 0;
1024
1025         /* Generic HID++ processing. */
1026         switch (data[0]) {
1027         case REPORT_ID_HIDPP_LONG:
1028                 if (size != HIDPP_REPORT_LONG_LENGTH) {
1029                         hid_err(hdev, "received hid++ report of bad size (%d)",
1030                                 size);
1031                         return 1;
1032                 }
1033                 ret = hidpp_raw_hidpp_event(hidpp, data, size);
1034                 break;
1035         case REPORT_ID_HIDPP_SHORT:
1036                 if (size != HIDPP_REPORT_SHORT_LENGTH) {
1037                         hid_err(hdev, "received hid++ report of bad size (%d)",
1038                                 size);
1039                         return 1;
1040                 }
1041                 ret = hidpp_raw_hidpp_event(hidpp, data, size);
1042                 break;
1043         }
1044
1045         /* If no report is available for further processing, skip calling
1046          * raw_event of subclasses. */
1047         if (ret != 0)
1048                 return ret;
1049
1050         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)
1051                 return wtp_raw_event(hdev, data, size);
1052
1053         return 0;
1054 }
1055
1056 static void hidpp_overwrite_name(struct hid_device *hdev, bool use_unifying)
1057 {
1058         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1059         char *name;
1060
1061         if (use_unifying)
1062                 /*
1063                  * the device is connected through an Unifying receiver, and
1064                  * might not be already connected.
1065                  * Ask the receiver for its name.
1066                  */
1067                 name = hidpp_get_unifying_name(hidpp);
1068         else
1069                 name = hidpp_get_device_name(hidpp);
1070
1071         if (!name)
1072                 hid_err(hdev, "unable to retrieve the name of the device");
1073         else
1074                 snprintf(hdev->name, sizeof(hdev->name), "%s", name);
1075
1076         kfree(name);
1077 }
1078
1079 static int hidpp_input_open(struct input_dev *dev)
1080 {
1081         struct hid_device *hid = input_get_drvdata(dev);
1082
1083         return hid_hw_open(hid);
1084 }
1085
1086 static void hidpp_input_close(struct input_dev *dev)
1087 {
1088         struct hid_device *hid = input_get_drvdata(dev);
1089
1090         hid_hw_close(hid);
1091 }
1092
1093 static struct input_dev *hidpp_allocate_input(struct hid_device *hdev)
1094 {
1095         struct input_dev *input_dev = devm_input_allocate_device(&hdev->dev);
1096         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1097
1098         if (!input_dev)
1099                 return NULL;
1100
1101         input_set_drvdata(input_dev, hdev);
1102         input_dev->open = hidpp_input_open;
1103         input_dev->close = hidpp_input_close;
1104
1105         input_dev->name = hidpp->name;
1106         input_dev->phys = hdev->phys;
1107         input_dev->uniq = hdev->uniq;
1108         input_dev->id.bustype = hdev->bus;
1109         input_dev->id.vendor  = hdev->vendor;
1110         input_dev->id.product = hdev->product;
1111         input_dev->id.version = hdev->version;
1112         input_dev->dev.parent = &hdev->dev;
1113
1114         return input_dev;
1115 }
1116
1117 static void hidpp_connect_event(struct hidpp_device *hidpp)
1118 {
1119         struct hid_device *hdev = hidpp->hid_dev;
1120         int ret = 0;
1121         bool connected = atomic_read(&hidpp->connected);
1122         struct input_dev *input;
1123         char *name, *devm_name;
1124
1125         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
1126                 ret = wtp_connect(hdev, connected);
1127                 if (ret)
1128                         return;
1129         }
1130
1131         if (!connected || hidpp->delayed_input)
1132                 return;
1133
1134         if (!hidpp->protocol_major) {
1135                 ret = !hidpp_is_connected(hidpp);
1136                 if (ret) {
1137                         hid_err(hdev, "Can not get the protocol version.\n");
1138                         return;
1139                 }
1140         }
1141
1142         /* the device is already connected, we can ask for its name and
1143          * protocol */
1144         hid_info(hdev, "HID++ %u.%u device connected.\n",
1145                  hidpp->protocol_major, hidpp->protocol_minor);
1146
1147         if (!hidpp->name || hidpp->name == hdev->name) {
1148                 name = hidpp_get_device_name(hidpp);
1149                 if (!name) {
1150                         hid_err(hdev,
1151                                 "unable to retrieve the name of the device");
1152                         return;
1153                 }
1154
1155                 devm_name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "%s", name);
1156                 kfree(name);
1157                 if (!devm_name)
1158                         return;
1159
1160                 hidpp->name = devm_name;
1161         }
1162
1163         input = hidpp_allocate_input(hdev);
1164         if (!input) {
1165                 hid_err(hdev, "cannot allocate new input device: %d\n", ret);
1166                 return;
1167         }
1168
1169         hidpp_populate_input(hidpp, input, false);
1170
1171         ret = input_register_device(input);
1172         if (ret)
1173                 input_free_device(input);
1174
1175         hidpp->delayed_input = input;
1176 }
1177
1178 static int hidpp_probe(struct hid_device *hdev, const struct hid_device_id *id)
1179 {
1180         struct hidpp_device *hidpp;
1181         int ret;
1182         bool connected;
1183         unsigned int connect_mask = HID_CONNECT_DEFAULT;
1184
1185         hidpp = devm_kzalloc(&hdev->dev, sizeof(struct hidpp_device),
1186                         GFP_KERNEL);
1187         if (!hidpp)
1188                 return -ENOMEM;
1189
1190         hidpp->hid_dev = hdev;
1191         hidpp->name = hdev->name;
1192         hid_set_drvdata(hdev, hidpp);
1193
1194         hidpp->quirks = id->driver_data;
1195
1196         if (disable_raw_mode) {
1197                 hidpp->quirks &= ~HIDPP_QUIRK_CLASS_WTP;
1198                 hidpp->quirks &= ~HIDPP_QUIRK_DELAYED_INIT;
1199         }
1200
1201         if (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP) {
1202                 ret = wtp_allocate(hdev, id);
1203                 if (ret)
1204                         goto wtp_allocate_fail;
1205         }
1206
1207         INIT_WORK(&hidpp->work, delayed_work_cb);
1208         mutex_init(&hidpp->send_mutex);
1209         init_waitqueue_head(&hidpp->wait);
1210
1211         ret = hid_parse(hdev);
1212         if (ret) {
1213                 hid_err(hdev, "%s:parse failed\n", __func__);
1214                 goto hid_parse_fail;
1215         }
1216
1217         /* Allow incoming packets */
1218         hid_device_io_start(hdev);
1219
1220         connected = hidpp_is_connected(hidpp);
1221         if (id->group != HID_GROUP_LOGITECH_DJ_DEVICE) {
1222                 if (!connected) {
1223                         ret = -ENODEV;
1224                         hid_err(hdev, "Device not connected");
1225                         hid_device_io_stop(hdev);
1226                         goto hid_parse_fail;
1227                 }
1228
1229                 hid_info(hdev, "HID++ %u.%u device connected.\n",
1230                          hidpp->protocol_major, hidpp->protocol_minor);
1231         }
1232
1233         hidpp_overwrite_name(hdev, id->group == HID_GROUP_LOGITECH_DJ_DEVICE);
1234         atomic_set(&hidpp->connected, connected);
1235
1236         if (connected && (hidpp->quirks & HIDPP_QUIRK_CLASS_WTP)) {
1237                 ret = wtp_get_config(hidpp);
1238                 if (ret)
1239                         goto hid_parse_fail;
1240         }
1241
1242         /* Block incoming packets */
1243         hid_device_io_stop(hdev);
1244
1245         if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT)
1246                 connect_mask &= ~HID_CONNECT_HIDINPUT;
1247
1248         /* Re-enable hidinput for multi-input devices */
1249         if (hidpp->quirks & HIDPP_QUIRK_MULTI_INPUT)
1250                 connect_mask |= HID_CONNECT_HIDINPUT;
1251
1252         ret = hid_hw_start(hdev, connect_mask);
1253         if (ret) {
1254                 hid_err(hdev, "%s:hid_hw_start returned error\n", __func__);
1255                 goto hid_hw_start_fail;
1256         }
1257
1258         if (hidpp->quirks & HIDPP_QUIRK_DELAYED_INIT) {
1259                 /* Allow incoming packets */
1260                 hid_device_io_start(hdev);
1261
1262                 hidpp_connect_event(hidpp);
1263         }
1264
1265         return ret;
1266
1267 hid_hw_start_fail:
1268 hid_parse_fail:
1269         cancel_work_sync(&hidpp->work);
1270         mutex_destroy(&hidpp->send_mutex);
1271 wtp_allocate_fail:
1272         hid_set_drvdata(hdev, NULL);
1273         return ret;
1274 }
1275
1276 static void hidpp_remove(struct hid_device *hdev)
1277 {
1278         struct hidpp_device *hidpp = hid_get_drvdata(hdev);
1279
1280         cancel_work_sync(&hidpp->work);
1281         mutex_destroy(&hidpp->send_mutex);
1282         hid_hw_stop(hdev);
1283 }
1284
1285 static const struct hid_device_id hidpp_devices[] = {
1286         { /* wireless touchpad */
1287           HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1288                 USB_VENDOR_ID_LOGITECH, 0x4011),
1289           .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT |
1290                          HIDPP_QUIRK_WTP_PHYSICAL_BUTTONS },
1291         { /* wireless touchpad T650 */
1292           HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1293                 USB_VENDOR_ID_LOGITECH, 0x4101),
1294           .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT },
1295         { /* wireless touchpad T651 */
1296           HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
1297                 USB_DEVICE_ID_LOGITECH_T651),
1298           .driver_data = HIDPP_QUIRK_CLASS_WTP },
1299         { /* Keyboard TK820 */
1300           HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1301                 USB_VENDOR_ID_LOGITECH, 0x4102),
1302           .driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_MULTI_INPUT |
1303                          HIDPP_QUIRK_CLASS_WTP },
1304
1305         { HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
1306                 USB_VENDOR_ID_LOGITECH, HID_ANY_ID)},
1307         {}
1308 };
1309
1310 MODULE_DEVICE_TABLE(hid, hidpp_devices);
1311
1312 static struct hid_driver hidpp_driver = {
1313         .name = "logitech-hidpp-device",
1314         .id_table = hidpp_devices,
1315         .probe = hidpp_probe,
1316         .remove = hidpp_remove,
1317         .raw_event = hidpp_raw_event,
1318         .input_configured = hidpp_input_configured,
1319         .input_mapping = hidpp_input_mapping,
1320 };
1321
1322 module_hid_driver(hidpp_driver);