drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/rmi.h>
  33 #include <linux/i2c.h>
  34 #include <linux/slab.h>
  35 #include "psmouse.h"
  36 #include "synaptics.h"
  37
  38 /*
  39  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  40  * section 2.3.2, which says that they should be valid regardless of the
  41  * actual size of the sensor.
  42  * Note that newer firmware allows querying device for maximum useable
  43  * coordinates.
  44  */
  45 #define XMIN 0
  46 #define XMAX 6143
  47 #define YMIN 0
  48 #define YMAX 6143
  49 #define XMIN_NOMINAL 1472
  50 #define XMAX_NOMINAL 5472
  51 #define YMIN_NOMINAL 1408
  52 #define YMAX_NOMINAL 4448
  53
  54 /* Size in bits of absolute position values reported by the hardware */
  55 #define ABS_POS_BITS 13
  56
  57 /*
  58  * These values should represent the absolute maximum value that will
  59  * be reported for a positive position value. Some Synaptics firmware
  60  * uses this value to indicate a finger near the edge of the touchpad
  61  * whose precise position cannot be determined.
  62  *
  63  * At least one touchpad is known to report positions in excess of this
  64  * value which are actually negative values truncated to the 13-bit
  65  * reporting range. These values have never been observed to be lower
  66  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  67  * negative and any other value as positive.
  68  */
  69 #define X_MAX_POSITIVE 8176
  70 #define Y_MAX_POSITIVE 8176
  71
  72 /* maximum ABS_MT_POSITION displacement (in mm) */
  73 #define DMAX 10
  74
  75 /*****************************************************************************
  76  *      Stuff we need even when we do not want native Synaptics support
  77  ****************************************************************************/
  78
  79 /*
  80  * Set the synaptics touchpad mode byte by special commands
  81  */
  82 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
  83 {
  84         u8 param[1];
  85         int error;
  86
  87         error = ps2_sliced_command(&psmouse->ps2dev, mode);
  88         if (error)
  89                 return error;
  90
  91         param[0] = SYN_PS_SET_MODE2;
  92         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
  93         if (error)
  94                 return error;
  95
  96         return 0;
  97 }
  98
  99 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
 100 {
 101         struct ps2dev *ps2dev = &psmouse->ps2dev;
 102         u8 param[4];
 103
 104         param[0] = 0;
 105
 106         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 107         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 108         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 109         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 110         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 111
 112         if (param[1] != 0x47)
 113                 return -ENODEV;
 114
 115         if (set_properties) {
 116                 psmouse->vendor = "Synaptics";
 117                 psmouse->name = "TouchPad";
 118         }
 119
 120         return 0;
 121 }
 122
 123 void synaptics_reset(struct psmouse *psmouse)
 124 {
 125         /* reset touchpad back to relative mode, gestures enabled */
 126         synaptics_mode_cmd(psmouse, 0);
 127 }
 128
 129 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
 130     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
 131
 132 /* This list has been kindly provided by Synaptics. */
 133 static const char * const topbuttonpad_pnp_ids[] = {
 134         "LEN0017",
 135         "LEN0018",
 136         "LEN0019",
 137         "LEN0023",
 138         "LEN002A",
 139         "LEN002B",
 140         "LEN002C",
 141         "LEN002D",
 142         "LEN002E",
 143         "LEN0033", /* Helix */
 144         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 145         "LEN0035", /* X240 */
 146         "LEN0036", /* T440 */
 147         "LEN0037", /* X1 Carbon 2nd */
 148         "LEN0038",
 149         "LEN0039", /* T440s */
 150         "LEN0041",
 151         "LEN0042", /* Yoga */
 152         "LEN0045",
 153         "LEN0047",
 154         "LEN0049",
 155         "LEN2000", /* S540 */
 156         "LEN2001", /* Edge E431 */
 157         "LEN2002", /* Edge E531 */
 158         "LEN2003",
 159         "LEN2004", /* L440 */
 160         "LEN2005",
 161         "LEN2006", /* Edge E440/E540 */
 162         "LEN2007",
 163         "LEN2008",
 164         "LEN2009",
 165         "LEN200A",
 166         "LEN200B",
 167         NULL
 168 };
 169
 170 static const char * const smbus_pnp_ids[] = {
 171         /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
 172         "LEN0048", /* X1 Carbon 3 */
 173         "LEN0046", /* X250 */
 174         "LEN004a", /* W541 */
 175         "LEN0071", /* T480 */
 176         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 177         "LEN0073", /* X1 Carbon G5 (Elantech) */
 178         "LEN0092", /* X1 Carbon 6 */
 179         "LEN0096", /* X280 */
 180         "LEN0097", /* X280 -> ALPS trackpoint */
 181         "LEN200f", /* T450s */
 182         NULL
 183 };
 184
 185 static const char * const forcepad_pnp_ids[] = {
 186         "SYN300D",
 187         "SYN3014",
 188         NULL
 189 };
 190
 191 /*
 192  * Send a command to the synpatics touchpad by special commands
 193  */
 194 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 195 {
 196         int error;
 197
 198         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 199         if (error)
 200                 return error;
 201
 202         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 203         if (error)
 204                 return error;
 205
 206         return 0;
 207 }
 208
 209 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 210 {
 211         int error;
 212         union {
 213                 __be32 be_val;
 214                 char buf[4];
 215         } resp = { 0 };
 216
 217         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 218         if (error)
 219                 return error;
 220
 221         *val = be32_to_cpu(resp.be_val);
 222         return 0;
 223 }
 224
 225 /*
 226  * Identify Touchpad
 227  * See also the SYN_ID_* macros
 228  */
 229 static int synaptics_identify(struct psmouse *psmouse,
 230                               struct synaptics_device_info *info)
 231 {
 232         int error;
 233
 234         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 235         if (error)
 236                 return error;
 237
 238         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 239 }
 240
 241 /*
 242  * Read the model-id bytes from the touchpad
 243  * see also SYN_MODEL_* macros
 244  */
 245 static int synaptics_model_id(struct psmouse *psmouse,
 246                               struct synaptics_device_info *info)
 247 {
 248         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 249 }
 250
 251 /*
 252  * Read the firmware id from the touchpad
 253  */
 254 static int synaptics_firmware_id(struct psmouse *psmouse,
 255                                  struct synaptics_device_info *info)
 256 {
 257         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 258                                    &info->firmware_id);
 259 }
 260
 261 /*
 262  * Read the board id and the "More Extended Queries" from the touchpad
 263  * The board id is encoded in the "QUERY MODES" response
 264  */
 265 static int synaptics_query_modes(struct psmouse *psmouse,
 266                                  struct synaptics_device_info *info)
 267 {
 268         u8 bid[3];
 269         int error;
 270
 271         /* firmwares prior 7.5 have no board_id encoded */
 272         if (SYN_ID_FULL(info->identity) < 0x705)
 273                 return 0;
 274
 275         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 276         if (error)
 277                 return error;
 278
 279         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 280
 281         if (SYN_MEXT_CAP_BIT(bid[0]))
 282                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 283                                            &info->ext_cap_10);
 284
 285         return 0;
 286 }
 287
 288 /*
 289  * Read the capability-bits from the touchpad
 290  * see also the SYN_CAP_* macros
 291  */
 292 static int synaptics_capability(struct psmouse *psmouse,
 293                                 struct synaptics_device_info *info)
 294 {
 295         int error;
 296
 297         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 298                                     &info->capabilities);
 299         if (error)
 300                 return error;
 301
 302         info->ext_cap = info->ext_cap_0c = 0;
 303
 304         /*
 305          * Older firmwares had submodel ID fixed to 0x47
 306          */
 307         if (SYN_ID_FULL(info->identity) < 0x705 &&
 308             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 309                 return -ENXIO;
 310         }
 311
 312         /*
 313          * Unless capExtended is set the rest of the flags should be ignored
 314          */
 315         if (!SYN_CAP_EXTENDED(info->capabilities))
 316                 info->capabilities = 0;
 317
 318         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 319                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 320                                             &info->ext_cap);
 321                 if (error) {
 322                         psmouse_warn(psmouse,
 323                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 324                 } else {
 325                         /*
 326                          * if nExtBtn is greater than 8 it should be considered
 327                          * invalid and treated as 0
 328                          */
 329                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 330                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 331                 }
 332         }
 333
 334         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 335                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 336                                             &info->ext_cap_0c);
 337                 if (error)
 338                         psmouse_warn(psmouse,
 339                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 340         }
 341
 342         return 0;
 343 }
 344
 345 /*
 346  * Read touchpad resolution and maximum reported coordinates
 347  * Resolution is left zero if touchpad does not support the query
 348  */
 349 static int synaptics_resolution(struct psmouse *psmouse,
 350                                 struct synaptics_device_info *info)
 351 {
 352         u8 resp[3];
 353         int error;
 354
 355         if (SYN_ID_MAJOR(info->identity) < 4)
 356                 return 0;
 357
 358         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 359         if (!error) {
 360                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 361                         info->x_res = resp[0]; /* x resolution in units/mm */
 362                         info->y_res = resp[2]; /* y resolution in units/mm */
 363                 }
 364         }
 365
 366         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 367             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 368                 error = synaptics_send_cmd(psmouse,
 369                                            SYN_QUE_EXT_MAX_COORDS, resp);
 370                 if (error) {
 371                         psmouse_warn(psmouse,
 372                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 373                 } else {
 374                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 375                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 376                         psmouse_info(psmouse,
 377                                      "queried max coordinates: x [..%d], y [..%d]\n",
 378                                      info->x_max, info->y_max);
 379                 }
 380         }
 381
 382         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 383             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 384              /*
 385               * Firmware v8.1 does not report proper number of extended
 386               * capabilities, but has been proven to report correct min
 387               * coordinates.
 388               */
 389              SYN_ID_FULL(info->identity) == 0x801)) {
 390                 error = synaptics_send_cmd(psmouse,
 391                                            SYN_QUE_EXT_MIN_COORDS, resp);
 392                 if (error) {
 393                         psmouse_warn(psmouse,
 394                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 395                 } else {
 396                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 397                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 398                         psmouse_info(psmouse,
 399                                      "queried min coordinates: x [%d..], y [%d..]\n",
 400                                      info->x_min, info->y_min);
 401                 }
 402         }
 403
 404         return 0;
 405 }
 406
 407 static int synaptics_query_hardware(struct psmouse *psmouse,
 408                                     struct synaptics_device_info *info)
 409 {
 410         int error;
 411
 412         memset(info, 0, sizeof(*info));
 413
 414         error = synaptics_identify(psmouse, info);
 415         if (error)
 416                 return error;
 417
 418         error = synaptics_model_id(psmouse, info);
 419         if (error)
 420                 return error;
 421
 422         error = synaptics_firmware_id(psmouse, info);
 423         if (error)
 424                 return error;
 425
 426         error = synaptics_query_modes(psmouse, info);
 427         if (error)
 428                 return error;
 429
 430         error = synaptics_capability(psmouse, info);
 431         if (error)
 432                 return error;
 433
 434         error = synaptics_resolution(psmouse, info);
 435         if (error)
 436                 return error;
 437
 438         return 0;
 439 }
 440
 441 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 442
 443 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 444
 445 static bool cr48_profile_sensor;
 446
 447 #define ANY_BOARD_ID 0
 448 struct min_max_quirk {
 449         const char * const *pnp_ids;
 450         struct {
 451                 u32 min, max;
 452         } board_id;
 453         u32 x_min, x_max, y_min, y_max;
 454 };
 455
 456 static const struct min_max_quirk min_max_pnpid_table[] = {
 457         {
 458                 (const char * const []){"LEN0033", NULL},
 459                 {ANY_BOARD_ID, ANY_BOARD_ID},
 460                 1024, 5052, 2258, 4832
 461         },
 462         {
 463                 (const char * const []){"LEN0042", NULL},
 464                 {ANY_BOARD_ID, ANY_BOARD_ID},
 465                 1232, 5710, 1156, 4696
 466         },
 467         {
 468                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 469                                         "LEN0039", "LEN2002", "LEN2004",
 470                                         NULL},
 471                 {ANY_BOARD_ID, 2961},
 472                 1024, 5112, 2024, 4832
 473         },
 474         {
 475                 (const char * const []){"LEN2000", NULL},
 476                 {ANY_BOARD_ID, ANY_BOARD_ID},
 477                 1024, 5113, 2021, 4832
 478         },
 479         {
 480                 (const char * const []){"LEN2001", NULL},
 481                 {ANY_BOARD_ID, ANY_BOARD_ID},
 482                 1024, 5022, 2508, 4832
 483         },
 484         {
 485                 (const char * const []){"LEN2006", NULL},
 486                 {2691, 2691},
 487                 1024, 5045, 2457, 4832
 488         },
 489         {
 490                 (const char * const []){"LEN2006", NULL},
 491                 {ANY_BOARD_ID, ANY_BOARD_ID},
 492                 1264, 5675, 1171, 4688
 493         },
 494         { }
 495 };
 496
 497 /*****************************************************************************
 498  *      Synaptics communications functions
 499  ****************************************************************************/
 500
 501 /*
 502  * Synaptics touchpads report the y coordinate from bottom to top, which is
 503  * opposite from what userspace expects.
 504  * This function is used to invert y before reporting.
 505  */
 506 static int synaptics_invert_y(int y)
 507 {
 508         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 509 }
 510
 511 /*
 512  * Apply quirk(s) if the hardware matches
 513  */
 514 static void synaptics_apply_quirks(struct psmouse *psmouse,
 515                                    struct synaptics_device_info *info)
 516 {
 517         int i;
 518
 519         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 520                 if (!psmouse_matches_pnp_id(psmouse,
 521                                             min_max_pnpid_table[i].pnp_ids))
 522                         continue;
 523
 524                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 525                     info->board_id < min_max_pnpid_table[i].board_id.min)
 526                         continue;
 527
 528                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 529                     info->board_id > min_max_pnpid_table[i].board_id.max)
 530                         continue;
 531
 532                 info->x_min = min_max_pnpid_table[i].x_min;
 533                 info->x_max = min_max_pnpid_table[i].x_max;
 534                 info->y_min = min_max_pnpid_table[i].y_min;
 535                 info->y_max = min_max_pnpid_table[i].y_max;
 536                 psmouse_info(psmouse,
 537                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 538                              info->x_min, info->x_max,
 539                              info->y_min, info->y_max);
 540                 break;
 541         }
 542 }
 543
 544 static bool synaptics_has_agm(struct synaptics_data *priv)
 545 {
 546         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 547                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 548 }
 549
 550 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 551 {
 552         static u8 param = 0xc8;
 553         int error;
 554
 555         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 556         if (error)
 557                 return error;
 558
 559         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 560         if (error)
 561                 return error;
 562
 563         return 0;
 564 }
 565
 566 static int synaptics_set_mode(struct psmouse *psmouse)
 567 {
 568         struct synaptics_data *priv = psmouse->private;
 569         int error;
 570
 571         priv->mode = 0;
 572         if (priv->absolute_mode)
 573                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 574         if (priv->disable_gesture)
 575                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 576         if (psmouse->rate >= 80)
 577                 priv->mode |= SYN_BIT_HIGH_RATE;
 578         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 579                 priv->mode |= SYN_BIT_W_MODE;
 580
 581         error = synaptics_mode_cmd(psmouse, priv->mode);
 582         if (error)
 583                 return error;
 584
 585         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 586                 error = synaptics_set_advanced_gesture_mode(psmouse);
 587                 if (error) {
 588                         psmouse_err(psmouse,
 589                                     "Advanced gesture mode init failed: %d\n",
 590                                     error);
 591                         return error;
 592                 }
 593         }
 594
 595         return 0;
 596 }
 597
 598 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 599 {
 600         struct synaptics_data *priv = psmouse->private;
 601
 602         if (rate >= 80) {
 603                 priv->mode |= SYN_BIT_HIGH_RATE;
 604                 psmouse->rate = 80;
 605         } else {
 606                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 607                 psmouse->rate = 40;
 608         }
 609
 610         synaptics_mode_cmd(psmouse, priv->mode);
 611 }
 612
 613 /*****************************************************************************
 614  *      Synaptics pass-through PS/2 port support
 615  ****************************************************************************/
 616 static int synaptics_pt_write(struct serio *serio, u8 c)
 617 {
 618         struct psmouse *parent = serio_get_drvdata(serio->parent);
 619         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 620         int error;
 621
 622         error = ps2_sliced_command(&parent->ps2dev, c);
 623         if (error)
 624                 return error;
 625
 626         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 627         if (error)
 628                 return error;
 629
 630         return 0;
 631 }
 632
 633 static int synaptics_pt_start(struct serio *serio)
 634 {
 635         struct psmouse *parent = serio_get_drvdata(serio->parent);
 636         struct synaptics_data *priv = parent->private;
 637
 638         serio_pause_rx(parent->ps2dev.serio);
 639         priv->pt_port = serio;
 640         serio_continue_rx(parent->ps2dev.serio);
 641
 642         return 0;
 643 }
 644
 645 static void synaptics_pt_stop(struct serio *serio)
 646 {
 647         struct psmouse *parent = serio_get_drvdata(serio->parent);
 648         struct synaptics_data *priv = parent->private;
 649
 650         serio_pause_rx(parent->ps2dev.serio);
 651         priv->pt_port = NULL;
 652         serio_continue_rx(parent->ps2dev.serio);
 653 }
 654
 655 static int synaptics_is_pt_packet(u8 *buf)
 656 {
 657         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 658 }
 659
 660 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 661 {
 662         struct psmouse *child = serio_get_drvdata(ptport);
 663
 664         if (child && child->state == PSMOUSE_ACTIVATED) {
 665                 serio_interrupt(ptport, packet[1], 0);
 666                 serio_interrupt(ptport, packet[4], 0);
 667                 serio_interrupt(ptport, packet[5], 0);
 668                 if (child->pktsize == 4)
 669                         serio_interrupt(ptport, packet[2], 0);
 670         } else {
 671                 serio_interrupt(ptport, packet[1], 0);
 672         }
 673 }
 674
 675 static void synaptics_pt_activate(struct psmouse *psmouse)
 676 {
 677         struct synaptics_data *priv = psmouse->private;
 678         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 679
 680         /* adjust the touchpad to child's choice of protocol */
 681         if (child) {
 682                 if (child->pktsize == 4)
 683                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 684                 else
 685                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 686
 687                 if (synaptics_mode_cmd(psmouse, priv->mode))
 688                         psmouse_warn(psmouse,
 689                                      "failed to switch guest protocol\n");
 690         }
 691 }
 692
 693 static void synaptics_pt_create(struct psmouse *psmouse)
 694 {
 695         struct serio *serio;
 696
 697         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 698         if (!serio) {
 699                 psmouse_err(psmouse,
 700                             "not enough memory for pass-through port\n");
 701                 return;
 702         }
 703
 704         serio->id.type = SERIO_PS_PSTHRU;
 705         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 706         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 707         serio->write = synaptics_pt_write;
 708         serio->start = synaptics_pt_start;
 709         serio->stop = synaptics_pt_stop;
 710         serio->parent = psmouse->ps2dev.serio;
 711
 712         psmouse->pt_activate = synaptics_pt_activate;
 713
 714         psmouse_info(psmouse, "serio: %s port at %s\n",
 715                      serio->name, psmouse->phys);
 716         serio_register_port(serio);
 717 }
 718
 719 /*****************************************************************************
 720  *      Functions to interpret the absolute mode packets
 721  ****************************************************************************/
 722
 723 static void synaptics_parse_agm(const u8 buf[],
 724                                 struct synaptics_data *priv,
 725                                 struct synaptics_hw_state *hw)
 726 {
 727         struct synaptics_hw_state *agm = &priv->agm;
 728         int agm_packet_type;
 729
 730         agm_packet_type = (buf[5] & 0x30) >> 4;
 731         switch (agm_packet_type) {
 732         case 1:
 733                 /* Gesture packet: (x, y, z) half resolution */
 734                 agm->w = hw->w;
 735                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 736                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 737                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 738                 break;
 739
 740         case 2:
 741                 /* AGM-CONTACT packet: we are only interested in the count */
 742                 priv->agm_count = buf[1];
 743                 break;
 744
 745         default:
 746                 break;
 747         }
 748 }
 749
 750 static void synaptics_parse_ext_buttons(const u8 buf[],
 751                                         struct synaptics_data *priv,
 752                                         struct synaptics_hw_state *hw)
 753 {
 754         unsigned int ext_bits =
 755                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 756         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 757
 758         hw->ext_buttons = buf[4] & ext_mask;
 759         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 760 }
 761
 762 static int synaptics_parse_hw_state(const u8 buf[],
 763                                     struct synaptics_data *priv,
 764                                     struct synaptics_hw_state *hw)
 765 {
 766         memset(hw, 0, sizeof(struct synaptics_hw_state));
 767
 768         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 769                 hw->w = (((buf[0] & 0x30) >> 2) |
 770                          ((buf[0] & 0x04) >> 1) |
 771                          ((buf[3] & 0x04) >> 2));
 772
 773                 if (synaptics_has_agm(priv) && hw->w == 2) {
 774                         synaptics_parse_agm(buf, priv, hw);
 775                         return 1;
 776                 }
 777
 778                 hw->x = (((buf[3] & 0x10) << 8) |
 779                          ((buf[1] & 0x0f) << 8) |
 780                          buf[4]);
 781                 hw->y = (((buf[3] & 0x20) << 7) |
 782                          ((buf[1] & 0xf0) << 4) |
 783                          buf[5]);
 784                 hw->z = buf[2];
 785
 786                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 787                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 788
 789                 if (priv->is_forcepad) {
 790                         /*
 791                          * ForcePads, like Clickpads, use middle button
 792                          * bits to report primary button clicks.
 793                          * Unfortunately they report primary button not
 794                          * only when user presses on the pad above certain
 795                          * threshold, but also when there are more than one
 796                          * finger on the touchpad, which interferes with
 797                          * out multi-finger gestures.
 798                          */
 799                         if (hw->z == 0) {
 800                                 /* No contacts */
 801                                 priv->press = priv->report_press = false;
 802                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 803                                 /*
 804                                  * Single-finger touch with pressure above
 805                                  * the threshold. If pressure stays long
 806                                  * enough, we'll start reporting primary
 807                                  * button. We rely on the device continuing
 808                                  * sending data even if finger does not
 809                                  * move.
 810                                  */
 811                                 if  (!priv->press) {
 812                                         priv->press_start = jiffies;
 813                                         priv->press = true;
 814                                 } else if (time_after(jiffies,
 815                                                 priv->press_start +
 816                                                         msecs_to_jiffies(50))) {
 817                                         priv->report_press = true;
 818                                 }
 819                         } else {
 820                                 priv->press = false;
 821                         }
 822
 823                         hw->left = priv->report_press;
 824
 825                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 826                         /*
 827                          * Clickpad's button is transmitted as middle button,
 828                          * however, since it is primary button, we will report
 829                          * it as BTN_LEFT.
 830                          */
 831                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 832
 833                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 834                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 835                         if (hw->w == 2)
 836                                 hw->scroll = (s8)buf[1];
 837                 }
 838
 839                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 840                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 841                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 842                 }
 843
 844                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 845                     ((buf[0] ^ buf[3]) & 0x02)) {
 846                         synaptics_parse_ext_buttons(buf, priv, hw);
 847                 }
 848         } else {
 849                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 850                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 851
 852                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 853                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 854
 855                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 856                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 857         }
 858
 859         /*
 860          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 861          * is used by some firmware to indicate a finger at the edge of
 862          * the touchpad whose precise position cannot be determined, so
 863          * convert these values to the maximum axis value.
 864          */
 865         if (hw->x > X_MAX_POSITIVE)
 866                 hw->x -= 1 << ABS_POS_BITS;
 867         else if (hw->x == X_MAX_POSITIVE)
 868                 hw->x = XMAX;
 869
 870         if (hw->y > Y_MAX_POSITIVE)
 871                 hw->y -= 1 << ABS_POS_BITS;
 872         else if (hw->y == Y_MAX_POSITIVE)
 873                 hw->y = YMAX;
 874
 875         return 0;
 876 }
 877
 878 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 879                                           bool active, int x, int y)
 880 {
 881         input_mt_slot(dev, slot);
 882         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 883         if (active) {
 884                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 885                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 886         }
 887 }
 888
 889 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 890                                           const struct synaptics_hw_state *a,
 891                                           const struct synaptics_hw_state *b,
 892                                           int num_fingers)
 893 {
 894         if (num_fingers >= 2) {
 895                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 896                                               min(a->y, b->y));
 897                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 898                                               max(a->y, b->y));
 899         } else if (num_fingers == 1) {
 900                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 901                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 902         } else {
 903                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 904                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 905         }
 906 }
 907
 908 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 909                                          const struct synaptics_hw_state *hw)
 910 {
 911         struct input_dev *dev = psmouse->dev;
 912         struct synaptics_data *priv = psmouse->private;
 913         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 914         int i;
 915
 916         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 917                 return;
 918
 919         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 920         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 921              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 922             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 923                 return;
 924
 925         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 926                 for (i = 0; i < ext_bits; i++) {
 927                         input_report_key(dev, BTN_0 + 2 * i,
 928                                 hw->ext_buttons & BIT(i));
 929                         input_report_key(dev, BTN_1 + 2 * i,
 930                                 hw->ext_buttons & BIT(i + ext_bits));
 931                 }
 932                 return;
 933         }
 934
 935         /*
 936          * This generation of touchpads has the trackstick buttons
 937          * physically wired to the touchpad. Re-route them through
 938          * the pass-through interface.
 939          */
 940         if (priv->pt_port) {
 941                 u8 pt_buttons;
 942
 943                 /* The trackstick expects at most 3 buttons */
 944                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 945                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 946                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 947
 948                 serio_interrupt(priv->pt_port,
 949                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 950                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 951         }
 952 }
 953
 954 static void synaptics_report_buttons(struct psmouse *psmouse,
 955                                      const struct synaptics_hw_state *hw)
 956 {
 957         struct input_dev *dev = psmouse->dev;
 958         struct synaptics_data *priv = psmouse->private;
 959
 960         input_report_key(dev, BTN_LEFT, hw->left);
 961         input_report_key(dev, BTN_RIGHT, hw->right);
 962
 963         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 964                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 965
 966         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 967                 input_report_key(dev, BTN_FORWARD, hw->up);
 968                 input_report_key(dev, BTN_BACK, hw->down);
 969         }
 970
 971         synaptics_report_ext_buttons(psmouse, hw);
 972 }
 973
 974 static void synaptics_report_mt_data(struct psmouse *psmouse,
 975                                      const struct synaptics_hw_state *sgm,
 976                                      int num_fingers)
 977 {
 978         struct input_dev *dev = psmouse->dev;
 979         struct synaptics_data *priv = psmouse->private;
 980         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 981         struct input_mt_pos pos[2];
 982         int slot[2], nsemi, i;
 983
 984         nsemi = clamp_val(num_fingers, 0, 2);
 985
 986         for (i = 0; i < nsemi; i++) {
 987                 pos[i].x = hw[i]->x;
 988                 pos[i].y = synaptics_invert_y(hw[i]->y);
 989         }
 990
 991         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
 992
 993         for (i = 0; i < nsemi; i++) {
 994                 input_mt_slot(dev, slot[i]);
 995                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 996                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 997                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 998                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 999         }
1000
1001         input_mt_drop_unused(dev);
1002
1003         /* Don't use active slot count to generate BTN_TOOL events. */
1004         input_mt_report_pointer_emulation(dev, false);
1005
1006         /* Send the number of fingers reported by touchpad itself. */
1007         input_mt_report_finger_count(dev, num_fingers);
1008
1009         synaptics_report_buttons(psmouse, sgm);
1010
1011         input_sync(dev);
1012 }
1013
1014 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1015                                            struct synaptics_hw_state *sgm)
1016 {
1017         struct synaptics_data *priv = psmouse->private;
1018         int num_fingers;
1019
1020         /*
1021          * Update mt_state using the new finger count and current mt_state.
1022          */
1023         if (sgm->z == 0)
1024                 num_fingers = 0;
1025         else if (sgm->w >= 4)
1026                 num_fingers = 1;
1027         else if (sgm->w == 0)
1028                 num_fingers = 2;
1029         else if (sgm->w == 1)
1030                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1031         else
1032                 num_fingers = 4;
1033
1034         /* Send resulting input events to user space */
1035         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1036 }
1037
1038 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1039 {
1040         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1041                 return true;
1042
1043         /* Advanced gesture mode also sends multi finger data */
1044         return synaptics_has_agm(priv);
1045 }
1046
1047 /*
1048  *  called for each full received packet from the touchpad
1049  */
1050 static void synaptics_process_packet(struct psmouse *psmouse)
1051 {
1052         struct input_dev *dev = psmouse->dev;
1053         struct synaptics_data *priv = psmouse->private;
1054         struct synaptics_device_info *info = &priv->info;
1055         struct synaptics_hw_state hw;
1056         int num_fingers;
1057         int finger_width;
1058
1059         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1060                 return;
1061
1062         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1063                 synaptics_image_sensor_process(psmouse, &hw);
1064                 return;
1065         }
1066
1067         if (hw.scroll) {
1068                 priv->scroll += hw.scroll;
1069
1070                 while (priv->scroll >= 4) {
1071                         input_report_key(dev, BTN_BACK, !hw.down);
1072                         input_sync(dev);
1073                         input_report_key(dev, BTN_BACK, hw.down);
1074                         input_sync(dev);
1075                         priv->scroll -= 4;
1076                 }
1077                 while (priv->scroll <= -4) {
1078                         input_report_key(dev, BTN_FORWARD, !hw.up);
1079                         input_sync(dev);
1080                         input_report_key(dev, BTN_FORWARD, hw.up);
1081                         input_sync(dev);
1082                         priv->scroll += 4;
1083                 }
1084                 return;
1085         }
1086
1087         if (hw.z > 0 && hw.x > 1) {
1088                 num_fingers = 1;
1089                 finger_width = 5;
1090                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1091                         switch (hw.w) {
1092                         case 0 ... 1:
1093                                 if (synaptics_has_multifinger(priv))
1094                                         num_fingers = hw.w + 2;
1095                                 break;
1096                         case 2:
1097                                 if (SYN_MODEL_PEN(info->model_id))
1098                                         ;   /* Nothing, treat a pen as a single finger */
1099                                 break;
1100                         case 4 ... 15:
1101                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1102                                         finger_width = hw.w;
1103                                 break;
1104                         }
1105                 }
1106         } else {
1107                 num_fingers = 0;
1108                 finger_width = 0;
1109         }
1110
1111         if (cr48_profile_sensor) {
1112                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1113                 return;
1114         }
1115
1116         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1117                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1118                                               num_fingers);
1119
1120         /* Post events
1121          * BTN_TOUCH has to be first as mousedev relies on it when doing
1122          * absolute -> relative conversion
1123          */
1124         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1125         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1126
1127         if (num_fingers > 0) {
1128                 input_report_abs(dev, ABS_X, hw.x);
1129                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1130         }
1131         input_report_abs(dev, ABS_PRESSURE, hw.z);
1132
1133         if (SYN_CAP_PALMDETECT(info->capabilities))
1134                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1135
1136         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1137         if (synaptics_has_multifinger(priv)) {
1138                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1139                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1140         }
1141
1142         synaptics_report_buttons(psmouse, &hw);
1143
1144         input_sync(dev);
1145 }
1146
1147 static bool synaptics_validate_byte(struct psmouse *psmouse,
1148                                     int idx, enum synaptics_pkt_type pkt_type)
1149 {
1150         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1151         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1152         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1153         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1154         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1155         const u8 *packet = psmouse->packet;
1156
1157         if (idx < 0 || idx > 4)
1158                 return false;
1159
1160         switch (pkt_type) {
1161
1162         case SYN_NEWABS:
1163         case SYN_NEWABS_RELAXED:
1164                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1165
1166         case SYN_NEWABS_STRICT:
1167                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1168
1169         case SYN_OLDABS:
1170                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1171
1172         default:
1173                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1174                 return false;
1175         }
1176 }
1177
1178 static enum synaptics_pkt_type
1179 synaptics_detect_pkt_type(struct psmouse *psmouse)
1180 {
1181         int i;
1182
1183         for (i = 0; i < 5; i++) {
1184                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1185                         psmouse_info(psmouse, "using relaxed packet validation\n");
1186                         return SYN_NEWABS_RELAXED;
1187                 }
1188         }
1189
1190         return SYN_NEWABS_STRICT;
1191 }
1192
1193 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1194 {
1195         struct synaptics_data *priv = psmouse->private;
1196
1197         if (psmouse->pktcnt >= 6) { /* Full packet received */
1198                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1199                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1200
1201                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1202                     synaptics_is_pt_packet(psmouse->packet)) {
1203                         if (priv->pt_port)
1204                                 synaptics_pass_pt_packet(priv->pt_port,
1205                                                          psmouse->packet);
1206                 } else
1207                         synaptics_process_packet(psmouse);
1208
1209                 return PSMOUSE_FULL_PACKET;
1210         }
1211
1212         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1213                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1214 }
1215
1216 /*****************************************************************************
1217  *      Driver initialization/cleanup functions
1218  ****************************************************************************/
1219 static void set_abs_position_params(struct input_dev *dev,
1220                                     struct synaptics_device_info *info,
1221                                     int x_code, int y_code)
1222 {
1223         int x_min = info->x_min ?: XMIN_NOMINAL;
1224         int x_max = info->x_max ?: XMAX_NOMINAL;
1225         int y_min = info->y_min ?: YMIN_NOMINAL;
1226         int y_max = info->y_max ?: YMAX_NOMINAL;
1227         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1228                         SYN_REDUCED_FILTER_FUZZ : 0;
1229
1230         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1231         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1232         input_abs_set_res(dev, x_code, info->x_res);
1233         input_abs_set_res(dev, y_code, info->y_res);
1234 }
1235
1236 static int set_input_params(struct psmouse *psmouse,
1237                             struct synaptics_data *priv)
1238 {
1239         struct input_dev *dev = psmouse->dev;
1240         struct synaptics_device_info *info = &priv->info;
1241         int i;
1242         int error;
1243
1244         /* Reset default psmouse capabilities */
1245         __clear_bit(EV_REL, dev->evbit);
1246         bitmap_zero(dev->relbit, REL_CNT);
1247         bitmap_zero(dev->keybit, KEY_CNT);
1248
1249         /* Things that apply to both modes */
1250         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1251
1252         input_set_capability(dev, EV_KEY, BTN_LEFT);
1253
1254         /* Clickpads report only left button */
1255         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1256                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1257                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1258                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1259         }
1260
1261         if (!priv->absolute_mode) {
1262                 /* Relative mode */
1263                 input_set_capability(dev, EV_REL, REL_X);
1264                 input_set_capability(dev, EV_REL, REL_Y);
1265                 return 0;
1266         }
1267
1268         /* Absolute mode */
1269         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1270         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1271
1272         if (cr48_profile_sensor)
1273                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1274
1275         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1276                 set_abs_position_params(dev, info,
1277                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1278                 /* Image sensors can report per-contact pressure */
1279                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1280
1281                 error = input_mt_init_slots(dev, 2,
1282                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1283                 if (error)
1284                         return error;
1285
1286                 /* Image sensors can signal 4 and 5 finger clicks */
1287                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1288                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1289         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1290                 set_abs_position_params(dev, info,
1291                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1292                 /*
1293                  * Profile sensor in CR-48 tracks contacts reasonably well,
1294                  * other non-image sensors with AGM use semi-mt.
1295                  */
1296                 error = input_mt_init_slots(dev, 2,
1297                                             INPUT_MT_POINTER |
1298                                              (cr48_profile_sensor ?
1299                                               INPUT_MT_TRACK :
1300                                               INPUT_MT_SEMI_MT));
1301                 if (error)
1302                         return error;
1303
1304                 /*
1305                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1306                  * input_mt_report_pointer_emulation. But
1307                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1308                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1309                  * position. Let's re-initialize ABS_X/Y here.
1310                  */
1311                 if (!cr48_profile_sensor)
1312                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1313         }
1314
1315         if (SYN_CAP_PALMDETECT(info->capabilities))
1316                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1317
1318         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1319         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1320
1321         if (synaptics_has_multifinger(priv)) {
1322                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1323                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1324         }
1325
1326         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1327             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1328                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1329                 input_set_capability(dev, EV_KEY, BTN_BACK);
1330         }
1331
1332         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1333                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1334                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1335
1336         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1337                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1338                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1339                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1340                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1341         }
1342
1343         return 0;
1344 }
1345
1346 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1347                                               void *data, char *buf)
1348 {
1349         struct synaptics_data *priv = psmouse->private;
1350
1351         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1352 }
1353
1354 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1355                                              void *data, const char *buf,
1356                                              size_t len)
1357 {
1358         struct synaptics_data *priv = psmouse->private;
1359         unsigned int value;
1360         int err;
1361
1362         err = kstrtouint(buf, 10, &value);
1363         if (err)
1364                 return err;
1365
1366         if (value > 1)
1367                 return -EINVAL;
1368
1369         if (value == priv->disable_gesture)
1370                 return len;
1371
1372         priv->disable_gesture = value;
1373         if (value)
1374                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1375         else
1376                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1377
1378         if (synaptics_mode_cmd(psmouse, priv->mode))
1379                 return -EIO;
1380
1381         return len;
1382 }
1383
1384 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1385                     synaptics_show_disable_gesture,
1386                     synaptics_set_disable_gesture);
1387
1388 static void synaptics_disconnect(struct psmouse *psmouse)
1389 {
1390         struct synaptics_data *priv = psmouse->private;
1391
1392         /*
1393          * We might have left a breadcrumb when trying to
1394          * set up SMbus companion.
1395          */
1396         psmouse_smbus_cleanup(psmouse);
1397
1398         if (!priv->absolute_mode &&
1399                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1400                 device_remove_file(&psmouse->ps2dev.serio->dev,
1401                                    &psmouse_attr_disable_gesture.dattr);
1402
1403         synaptics_reset(psmouse);
1404         kfree(priv);
1405         psmouse->private = NULL;
1406 }
1407
1408 static int synaptics_reconnect(struct psmouse *psmouse)
1409 {
1410         struct synaptics_data *priv = psmouse->private;
1411         struct synaptics_device_info info;
1412         u8 param[2];
1413         int retry = 0;
1414         int error;
1415
1416         do {
1417                 psmouse_reset(psmouse);
1418                 if (retry) {
1419                         /*
1420                          * On some boxes, right after resuming, the touchpad
1421                          * needs some time to finish initializing (I assume
1422                          * it needs time to calibrate) and start responding
1423                          * to Synaptics-specific queries, so let's wait a
1424                          * bit.
1425                          */
1426                         ssleep(1);
1427                 }
1428                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1429                 error = synaptics_detect(psmouse, 0);
1430         } while (error && ++retry < 3);
1431
1432         if (error)
1433                 return error;
1434
1435         if (retry > 1)
1436                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1437
1438         error = synaptics_query_hardware(psmouse, &info);
1439         if (error) {
1440                 psmouse_err(psmouse, "Unable to query device.\n");
1441                 return error;
1442         }
1443
1444         error = synaptics_set_mode(psmouse);
1445         if (error) {
1446                 psmouse_err(psmouse, "Unable to initialize device.\n");
1447                 return error;
1448         }
1449
1450         if (info.identity != priv->info.identity ||
1451             info.model_id != priv->info.model_id ||
1452             info.capabilities != priv->info.capabilities ||
1453             info.ext_cap != priv->info.ext_cap) {
1454                 psmouse_err(psmouse,
1455                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1456                             priv->info.identity, info.identity,
1457                             priv->info.model_id, info.model_id,
1458                             priv->info.capabilities, info.capabilities,
1459                             priv->info.ext_cap, info.ext_cap);
1460                 return -ENXIO;
1461         }
1462
1463         return 0;
1464 }
1465
1466 static bool impaired_toshiba_kbc;
1467
1468 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1469 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1470         {
1471                 /* Toshiba Satellite */
1472                 .matches = {
1473                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1474                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1475                 },
1476         },
1477         {
1478                 /* Toshiba Dynabook */
1479                 .matches = {
1480                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1481                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1482                 },
1483         },
1484         {
1485                 /* Toshiba Portege M300 */
1486                 .matches = {
1487                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1488                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1489                 },
1490
1491         },
1492         {
1493                 /* Toshiba Portege M300 */
1494                 .matches = {
1495                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1496                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1497                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1498                 },
1499
1500         },
1501 #endif
1502         { }
1503 };
1504
1505 static bool broken_olpc_ec;
1506
1507 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1508 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1509         {
1510                 /* OLPC XO-1 or XO-1.5 */
1511                 .matches = {
1512                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1513                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1514                 },
1515         },
1516 #endif
1517         { }
1518 };
1519
1520 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1521 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1522         {
1523                 /* Cr-48 Chromebook (Codename Mario) */
1524                 .matches = {
1525                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1526                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1527                 },
1528         },
1529 #endif
1530         { }
1531 };
1532
1533 void __init synaptics_module_init(void)
1534 {
1535         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1536         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1537         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1538 }
1539
1540 static int synaptics_init_ps2(struct psmouse *psmouse,
1541                               struct synaptics_device_info *info,
1542                               bool absolute_mode)
1543 {
1544         struct synaptics_data *priv;
1545         int err;
1546
1547         synaptics_apply_quirks(psmouse, info);
1548
1549         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1550         if (!priv)
1551                 return -ENOMEM;
1552
1553         priv->info = *info;
1554         priv->absolute_mode = absolute_mode;
1555         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1556                 priv->disable_gesture = true;
1557
1558         /*
1559          * Unfortunately ForcePad capability is not exported over PS/2,
1560          * so we have to resort to checking PNP IDs.
1561          */
1562         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1563
1564         err = synaptics_set_mode(psmouse);
1565         if (err) {
1566                 psmouse_err(psmouse, "Unable to initialize device.\n");
1567                 goto init_fail;
1568         }
1569
1570         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1571                                         SYN_NEWABS : SYN_OLDABS;
1572
1573         psmouse_info(psmouse,
1574                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1575                      SYN_ID_MODEL(info->identity),
1576                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1577                      info->model_id,
1578                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1579                      info->ext_cap_10, info->board_id, info->firmware_id);
1580
1581         err = set_input_params(psmouse, priv);
1582         if (err) {
1583                 psmouse_err(psmouse,
1584                             "failed to set up capabilities: %d\n", err);
1585                 goto init_fail;
1586         }
1587
1588         /*
1589          * Encode touchpad model so that it can be used to set
1590          * input device->id.version and be visible to userspace.
1591          * Because version is __u16 we have to drop something.
1592          * Hardware info bits seem to be good candidates as they
1593          * are documented to be for Synaptics corp. internal use.
1594          */
1595         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1596                           (info->model_id & 0x000000ff);
1597
1598         if (absolute_mode) {
1599                 psmouse->protocol_handler = synaptics_process_byte;
1600                 psmouse->pktsize = 6;
1601         } else {
1602                 /* Relative mode follows standard PS/2 mouse protocol */
1603                 psmouse->protocol_handler = psmouse_process_byte;
1604                 psmouse->pktsize = 3;
1605         }
1606
1607         psmouse->set_rate = synaptics_set_rate;
1608         psmouse->disconnect = synaptics_disconnect;
1609         psmouse->reconnect = synaptics_reconnect;
1610         psmouse->cleanup = synaptics_reset;
1611         /* Synaptics can usually stay in sync without extra help */
1612         psmouse->resync_time = 0;
1613
1614         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1615                 synaptics_pt_create(psmouse);
1616
1617         /*
1618          * Toshiba's KBC seems to have trouble handling data from
1619          * Synaptics at full rate.  Switch to a lower rate (roughly
1620          * the same rate as a standard PS/2 mouse).
1621          */
1622         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1623                 psmouse_info(psmouse,
1624                              "Toshiba %s detected, limiting rate to 40pps.\n",
1625                              dmi_get_system_info(DMI_PRODUCT_NAME));
1626                 psmouse->rate = 40;
1627         }
1628
1629         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1630                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1631                                          &psmouse_attr_disable_gesture.dattr);
1632                 if (err) {
1633                         psmouse_err(psmouse,
1634                                     "Failed to create disable_gesture attribute (%d)",
1635                                     err);
1636                         goto init_fail;
1637                 }
1638         }
1639
1640         return 0;
1641
1642  init_fail:
1643         kfree(priv);
1644         return err;
1645 }
1646
1647 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1648 {
1649         struct synaptics_device_info info;
1650         int error;
1651
1652         psmouse_reset(psmouse);
1653
1654         error = synaptics_query_hardware(psmouse, &info);
1655         if (error) {
1656                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1657                 return error;
1658         }
1659
1660         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1661 }
1662
1663 int synaptics_init_absolute(struct psmouse *psmouse)
1664 {
1665         return __synaptics_init(psmouse, true);
1666 }
1667
1668 int synaptics_init_relative(struct psmouse *psmouse)
1669 {
1670         return __synaptics_init(psmouse, false);
1671 }
1672
1673 static int synaptics_setup_ps2(struct psmouse *psmouse,
1674                                struct synaptics_device_info *info)
1675 {
1676         bool absolute_mode = true;
1677         int error;
1678
1679         /*
1680          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1681          * packet spew overloads the EC such that key presses on the keyboard
1682          * are missed.  Given that, don't even attempt to use Absolute mode.
1683          * Relative mode seems to work just fine.
1684          */
1685         if (broken_olpc_ec) {
1686                 psmouse_info(psmouse,
1687                              "OLPC XO detected, forcing relative protocol.\n");
1688                 absolute_mode = false;
1689         }
1690
1691         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1692         if (error)
1693                 return error;
1694
1695         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1696 }
1697
1698 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1699
1700 void __init synaptics_module_init(void)
1701 {
1702 }
1703
1704 static int __maybe_unused
1705 synaptics_setup_ps2(struct psmouse *psmouse,
1706                     struct synaptics_device_info *info)
1707 {
1708         return -ENOSYS;
1709 }
1710
1711 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1712
1713 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1714
1715 /*
1716  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1717  * provides a better bandwidth and allow a better control of the touchpads.
1718  * This is used to decide if we need to use this bus or not.
1719  */
1720 enum {
1721         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1722         SYNAPTICS_INTERTOUCH_OFF,
1723         SYNAPTICS_INTERTOUCH_ON,
1724 };
1725
1726 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1727                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1728 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1729 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1730
1731 static int synaptics_create_intertouch(struct psmouse *psmouse,
1732                                        struct synaptics_device_info *info,
1733                                        bool leave_breadcrumbs)
1734 {
1735         bool topbuttonpad =
1736                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1737                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1738         const struct rmi_device_platform_data pdata = {
1739                 .sensor_pdata = {
1740                         .sensor_type = rmi_sensor_touchpad,
1741                         .axis_align.flip_y = true,
1742                         .kernel_tracking = false,
1743                         .topbuttonpad = topbuttonpad,
1744                 },
1745                 .f30_data = {
1746                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1747                         .trackstick_buttons =
1748                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1749                 },
1750         };
1751         const struct i2c_board_info intertouch_board = {
1752                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1753                 .flags = I2C_CLIENT_HOST_NOTIFY,
1754         };
1755
1756         return psmouse_smbus_init(psmouse, &intertouch_board,
1757                                   &pdata, sizeof(pdata), true,
1758                                   leave_breadcrumbs);
1759 }
1760
1761 /**
1762  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1763  * and decides to instantiate a SMBus InterTouch device.
1764  */
1765 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1766                                       struct synaptics_device_info *info,
1767                                       bool leave_breadcrumbs)
1768 {
1769         int error;
1770
1771         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1772                 return -ENXIO;
1773
1774         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1775                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1776                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1777
1778                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1779                                 psmouse_info(psmouse,
1780                                              "Your touchpad (%s) says it can support a different bus. "
1781                                              "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.\n",
1782                                              psmouse->ps2dev.serio->firmware_id);
1783
1784                         return -ENXIO;
1785                 }
1786         }
1787
1788         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1789
1790         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1791         if (error) {
1792                 if (error == -EAGAIN)
1793                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1794                 else
1795                         psmouse_err(psmouse, "unable to create intertouch device\n");
1796
1797                 return error;
1798         }
1799
1800         return 0;
1801 }
1802
1803 int synaptics_init_smbus(struct psmouse *psmouse)
1804 {
1805         struct synaptics_device_info info;
1806         int error;
1807
1808         psmouse_reset(psmouse);
1809
1810         error = synaptics_query_hardware(psmouse, &info);
1811         if (error) {
1812                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1813                 return error;
1814         }
1815
1816         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1817                 return -ENXIO;
1818
1819         return synaptics_create_intertouch(psmouse, &info, false);
1820 }
1821
1822 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1823
1824 static int __maybe_unused
1825 synaptics_setup_intertouch(struct psmouse *psmouse,
1826                            struct synaptics_device_info *info,
1827                            bool leave_breadcrumbs)
1828 {
1829         return -ENOSYS;
1830 }
1831
1832 int synaptics_init_smbus(struct psmouse *psmouse)
1833 {
1834         return -ENOSYS;
1835 }
1836
1837 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1838
1839 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1840     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1841
1842 int synaptics_init(struct psmouse *psmouse)
1843 {
1844         struct synaptics_device_info info;
1845         int error;
1846         int retval;
1847
1848         psmouse_reset(psmouse);
1849
1850         error = synaptics_query_hardware(psmouse, &info);
1851         if (error) {
1852                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1853                 return error;
1854         }
1855
1856         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1857                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1858                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1859                     /* Forcepads need F21, which is not ready */
1860                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1861                         psmouse_warn(psmouse,
1862                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1863                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1864                 }
1865
1866                 error = synaptics_setup_intertouch(psmouse, &info, true);
1867                 if (!error)
1868                         return PSMOUSE_SYNAPTICS_SMBUS;
1869         }
1870
1871         retval = synaptics_setup_ps2(psmouse, &info);
1872         if (retval < 0) {
1873                 /*
1874                  * Not using any flavor of Synaptics support, so clean up
1875                  * SMbus breadcrumbs, if any.
1876                  */
1877                 psmouse_smbus_cleanup(psmouse);
1878         }
1879
1880         return retval;
1881 }
1882
1883 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1884
1885 int synaptics_init(struct psmouse *psmouse)
1886 {
1887         return -ENOSYS;
1888 }
1889
1890 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */