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