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] = { 0 };
 103
 104         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 105         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 106         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 107         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 108         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 109
 110         if (param[1] != 0x47)
 111                 return -ENODEV;
 112
 113         if (set_properties) {
 114                 psmouse->vendor = "Synaptics";
 115                 psmouse->name = "TouchPad";
 116         }
 117
 118         return 0;
 119 }
 120
 121 void synaptics_reset(struct psmouse *psmouse)
 122 {
 123         /* reset touchpad back to relative mode, gestures enabled */
 124         synaptics_mode_cmd(psmouse, 0);
 125 }
 126
 127 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
 128     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
 129
 130 /* This list has been kindly provided by Synaptics. */
 131 static const char * const topbuttonpad_pnp_ids[] = {
 132         "LEN0017",
 133         "LEN0018",
 134         "LEN0019",
 135         "LEN0023",
 136         "LEN002A",
 137         "LEN002B",
 138         "LEN002C",
 139         "LEN002D",
 140         "LEN002E",
 141         "LEN0033", /* Helix */
 142         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 143         "LEN0035", /* X240 */
 144         "LEN0036", /* T440 */
 145         "LEN0037", /* X1 Carbon 2nd */
 146         "LEN0038",
 147         "LEN0039", /* T440s */
 148         "LEN0041",
 149         "LEN0042", /* Yoga */
 150         "LEN0045",
 151         "LEN0047",
 152         "LEN2000", /* S540 */
 153         "LEN2001", /* Edge E431 */
 154         "LEN2002", /* Edge E531 */
 155         "LEN2003",
 156         "LEN2004", /* L440 */
 157         "LEN2005",
 158         "LEN2006", /* Edge E440/E540 */
 159         "LEN2007",
 160         "LEN2008",
 161         "LEN2009",
 162         "LEN200A",
 163         "LEN200B",
 164         NULL
 165 };
 166
 167 static const char * const smbus_pnp_ids[] = {
 168         /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
 169         "LEN0048", /* X1 Carbon 3 */
 170         "LEN0046", /* X250 */
 171         "LEN0049", /* Yoga 11e */
 172         "LEN004a", /* W541 */
 173         "LEN005b", /* P50 */
 174         "LEN005e", /* T560 */
 175         "LEN006c", /* T470s */
 176         "LEN007a", /* T470s */
 177         "LEN0071", /* T480 */
 178         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 179         "LEN0073", /* X1 Carbon G5 (Elantech) */
 180         "LEN0091", /* X1 Carbon 6 */
 181         "LEN0092", /* X1 Carbon 6 */
 182         "LEN0093", /* T480 */
 183         "LEN0096", /* X280 */
 184         "LEN0097", /* X280 -> ALPS trackpoint */
 185         "LEN0099", /* X1 Extreme 1st */
 186         "LEN009b", /* T580 */
 187         "LEN200f", /* T450s */
 188         "LEN2044", /* L470  */
 189         "LEN2054", /* E480 */
 190         "LEN2055", /* E580 */
 191         "SYN3052", /* HP EliteBook 840 G4 */
 192         "SYN3221", /* HP 15-ay000 */
 193         "SYN323d", /* HP Spectre X360 13-w013dx */
 194         "SYN3257", /* HP Envy 13-ad105ng */
 195         NULL
 196 };
 197
 198 static const char * const forcepad_pnp_ids[] = {
 199         "SYN300D",
 200         "SYN3014",
 201         NULL
 202 };
 203
 204 /*
 205  * Send a command to the synpatics touchpad by special commands
 206  */
 207 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 208 {
 209         int error;
 210
 211         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 212         if (error)
 213                 return error;
 214
 215         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 216         if (error)
 217                 return error;
 218
 219         return 0;
 220 }
 221
 222 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 223 {
 224         int error;
 225         union {
 226                 __be32 be_val;
 227                 char buf[4];
 228         } resp = { 0 };
 229
 230         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 231         if (error)
 232                 return error;
 233
 234         *val = be32_to_cpu(resp.be_val);
 235         return 0;
 236 }
 237
 238 /*
 239  * Identify Touchpad
 240  * See also the SYN_ID_* macros
 241  */
 242 static int synaptics_identify(struct psmouse *psmouse,
 243                               struct synaptics_device_info *info)
 244 {
 245         int error;
 246
 247         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 248         if (error)
 249                 return error;
 250
 251         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 252 }
 253
 254 /*
 255  * Read the model-id bytes from the touchpad
 256  * see also SYN_MODEL_* macros
 257  */
 258 static int synaptics_model_id(struct psmouse *psmouse,
 259                               struct synaptics_device_info *info)
 260 {
 261         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 262 }
 263
 264 /*
 265  * Read the firmware id from the touchpad
 266  */
 267 static int synaptics_firmware_id(struct psmouse *psmouse,
 268                                  struct synaptics_device_info *info)
 269 {
 270         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 271                                    &info->firmware_id);
 272 }
 273
 274 /*
 275  * Read the board id and the "More Extended Queries" from the touchpad
 276  * The board id is encoded in the "QUERY MODES" response
 277  */
 278 static int synaptics_query_modes(struct psmouse *psmouse,
 279                                  struct synaptics_device_info *info)
 280 {
 281         u8 bid[3];
 282         int error;
 283
 284         /* firmwares prior 7.5 have no board_id encoded */
 285         if (SYN_ID_FULL(info->identity) < 0x705)
 286                 return 0;
 287
 288         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 289         if (error)
 290                 return error;
 291
 292         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 293
 294         if (SYN_MEXT_CAP_BIT(bid[0]))
 295                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 296                                            &info->ext_cap_10);
 297
 298         return 0;
 299 }
 300
 301 /*
 302  * Read the capability-bits from the touchpad
 303  * see also the SYN_CAP_* macros
 304  */
 305 static int synaptics_capability(struct psmouse *psmouse,
 306                                 struct synaptics_device_info *info)
 307 {
 308         int error;
 309
 310         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 311                                     &info->capabilities);
 312         if (error)
 313                 return error;
 314
 315         info->ext_cap = info->ext_cap_0c = 0;
 316
 317         /*
 318          * Older firmwares had submodel ID fixed to 0x47
 319          */
 320         if (SYN_ID_FULL(info->identity) < 0x705 &&
 321             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 322                 return -ENXIO;
 323         }
 324
 325         /*
 326          * Unless capExtended is set the rest of the flags should be ignored
 327          */
 328         if (!SYN_CAP_EXTENDED(info->capabilities))
 329                 info->capabilities = 0;
 330
 331         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 332                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 333                                             &info->ext_cap);
 334                 if (error) {
 335                         psmouse_warn(psmouse,
 336                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 337                 } else {
 338                         /*
 339                          * if nExtBtn is greater than 8 it should be considered
 340                          * invalid and treated as 0
 341                          */
 342                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 343                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 344                 }
 345         }
 346
 347         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 348                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 349                                             &info->ext_cap_0c);
 350                 if (error)
 351                         psmouse_warn(psmouse,
 352                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 353         }
 354
 355         return 0;
 356 }
 357
 358 /*
 359  * Read touchpad resolution and maximum reported coordinates
 360  * Resolution is left zero if touchpad does not support the query
 361  */
 362 static int synaptics_resolution(struct psmouse *psmouse,
 363                                 struct synaptics_device_info *info)
 364 {
 365         u8 resp[3];
 366         int error;
 367
 368         if (SYN_ID_MAJOR(info->identity) < 4)
 369                 return 0;
 370
 371         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 372         if (!error) {
 373                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 374                         info->x_res = resp[0]; /* x resolution in units/mm */
 375                         info->y_res = resp[2]; /* y resolution in units/mm */
 376                 }
 377         }
 378
 379         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 380             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 381                 error = synaptics_send_cmd(psmouse,
 382                                            SYN_QUE_EXT_MAX_COORDS, resp);
 383                 if (error) {
 384                         psmouse_warn(psmouse,
 385                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 386                 } else {
 387                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 388                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 389                         psmouse_info(psmouse,
 390                                      "queried max coordinates: x [..%d], y [..%d]\n",
 391                                      info->x_max, info->y_max);
 392                 }
 393         }
 394
 395         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 396             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 397              /*
 398               * Firmware v8.1 does not report proper number of extended
 399               * capabilities, but has been proven to report correct min
 400               * coordinates.
 401               */
 402              SYN_ID_FULL(info->identity) == 0x801)) {
 403                 error = synaptics_send_cmd(psmouse,
 404                                            SYN_QUE_EXT_MIN_COORDS, resp);
 405                 if (error) {
 406                         psmouse_warn(psmouse,
 407                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 408                 } else {
 409                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 410                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 411                         psmouse_info(psmouse,
 412                                      "queried min coordinates: x [%d..], y [%d..]\n",
 413                                      info->x_min, info->y_min);
 414                 }
 415         }
 416
 417         return 0;
 418 }
 419
 420 static int synaptics_query_hardware(struct psmouse *psmouse,
 421                                     struct synaptics_device_info *info)
 422 {
 423         int error;
 424
 425         memset(info, 0, sizeof(*info));
 426
 427         error = synaptics_identify(psmouse, info);
 428         if (error)
 429                 return error;
 430
 431         error = synaptics_model_id(psmouse, info);
 432         if (error)
 433                 return error;
 434
 435         error = synaptics_firmware_id(psmouse, info);
 436         if (error)
 437                 return error;
 438
 439         error = synaptics_query_modes(psmouse, info);
 440         if (error)
 441                 return error;
 442
 443         error = synaptics_capability(psmouse, info);
 444         if (error)
 445                 return error;
 446
 447         error = synaptics_resolution(psmouse, info);
 448         if (error)
 449                 return error;
 450
 451         return 0;
 452 }
 453
 454 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 455
 456 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 457
 458 static bool cr48_profile_sensor;
 459
 460 #define ANY_BOARD_ID 0
 461 struct min_max_quirk {
 462         const char * const *pnp_ids;
 463         struct {
 464                 u32 min, max;
 465         } board_id;
 466         u32 x_min, x_max, y_min, y_max;
 467 };
 468
 469 static const struct min_max_quirk min_max_pnpid_table[] = {
 470         {
 471                 (const char * const []){"LEN0033", NULL},
 472                 {ANY_BOARD_ID, ANY_BOARD_ID},
 473                 1024, 5052, 2258, 4832
 474         },
 475         {
 476                 (const char * const []){"LEN0042", NULL},
 477                 {ANY_BOARD_ID, ANY_BOARD_ID},
 478                 1232, 5710, 1156, 4696
 479         },
 480         {
 481                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 482                                         "LEN0039", "LEN2002", "LEN2004",
 483                                         NULL},
 484                 {ANY_BOARD_ID, 2961},
 485                 1024, 5112, 2024, 4832
 486         },
 487         {
 488                 (const char * const []){"LEN2000", NULL},
 489                 {ANY_BOARD_ID, ANY_BOARD_ID},
 490                 1024, 5113, 2021, 4832
 491         },
 492         {
 493                 (const char * const []){"LEN2001", NULL},
 494                 {ANY_BOARD_ID, ANY_BOARD_ID},
 495                 1024, 5022, 2508, 4832
 496         },
 497         {
 498                 (const char * const []){"LEN2006", NULL},
 499                 {2691, 2691},
 500                 1024, 5045, 2457, 4832
 501         },
 502         {
 503                 (const char * const []){"LEN2006", NULL},
 504                 {ANY_BOARD_ID, ANY_BOARD_ID},
 505                 1264, 5675, 1171, 4688
 506         },
 507         { }
 508 };
 509
 510 /*****************************************************************************
 511  *      Synaptics communications functions
 512  ****************************************************************************/
 513
 514 /*
 515  * Synaptics touchpads report the y coordinate from bottom to top, which is
 516  * opposite from what userspace expects.
 517  * This function is used to invert y before reporting.
 518  */
 519 static int synaptics_invert_y(int y)
 520 {
 521         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 522 }
 523
 524 /*
 525  * Apply quirk(s) if the hardware matches
 526  */
 527 static void synaptics_apply_quirks(struct psmouse *psmouse,
 528                                    struct synaptics_device_info *info)
 529 {
 530         int i;
 531
 532         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 533                 if (!psmouse_matches_pnp_id(psmouse,
 534                                             min_max_pnpid_table[i].pnp_ids))
 535                         continue;
 536
 537                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 538                     info->board_id < min_max_pnpid_table[i].board_id.min)
 539                         continue;
 540
 541                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 542                     info->board_id > min_max_pnpid_table[i].board_id.max)
 543                         continue;
 544
 545                 info->x_min = min_max_pnpid_table[i].x_min;
 546                 info->x_max = min_max_pnpid_table[i].x_max;
 547                 info->y_min = min_max_pnpid_table[i].y_min;
 548                 info->y_max = min_max_pnpid_table[i].y_max;
 549                 psmouse_info(psmouse,
 550                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 551                              info->x_min, info->x_max,
 552                              info->y_min, info->y_max);
 553                 break;
 554         }
 555 }
 556
 557 static bool synaptics_has_agm(struct synaptics_data *priv)
 558 {
 559         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 560                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 561 }
 562
 563 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 564 {
 565         static u8 param = 0xc8;
 566         int error;
 567
 568         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 569         if (error)
 570                 return error;
 571
 572         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 573         if (error)
 574                 return error;
 575
 576         return 0;
 577 }
 578
 579 static int synaptics_set_mode(struct psmouse *psmouse)
 580 {
 581         struct synaptics_data *priv = psmouse->private;
 582         int error;
 583
 584         priv->mode = 0;
 585         if (priv->absolute_mode)
 586                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 587         if (priv->disable_gesture)
 588                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 589         if (psmouse->rate >= 80)
 590                 priv->mode |= SYN_BIT_HIGH_RATE;
 591         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 592                 priv->mode |= SYN_BIT_W_MODE;
 593
 594         error = synaptics_mode_cmd(psmouse, priv->mode);
 595         if (error)
 596                 return error;
 597
 598         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 599                 error = synaptics_set_advanced_gesture_mode(psmouse);
 600                 if (error) {
 601                         psmouse_err(psmouse,
 602                                     "Advanced gesture mode init failed: %d\n",
 603                                     error);
 604                         return error;
 605                 }
 606         }
 607
 608         return 0;
 609 }
 610
 611 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 612 {
 613         struct synaptics_data *priv = psmouse->private;
 614
 615         if (rate >= 80) {
 616                 priv->mode |= SYN_BIT_HIGH_RATE;
 617                 psmouse->rate = 80;
 618         } else {
 619                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 620                 psmouse->rate = 40;
 621         }
 622
 623         synaptics_mode_cmd(psmouse, priv->mode);
 624 }
 625
 626 /*****************************************************************************
 627  *      Synaptics pass-through PS/2 port support
 628  ****************************************************************************/
 629 static int synaptics_pt_write(struct serio *serio, u8 c)
 630 {
 631         struct psmouse *parent = serio_get_drvdata(serio->parent);
 632         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 633         int error;
 634
 635         error = ps2_sliced_command(&parent->ps2dev, c);
 636         if (error)
 637                 return error;
 638
 639         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 640         if (error)
 641                 return error;
 642
 643         return 0;
 644 }
 645
 646 static int synaptics_pt_start(struct serio *serio)
 647 {
 648         struct psmouse *parent = serio_get_drvdata(serio->parent);
 649         struct synaptics_data *priv = parent->private;
 650
 651         serio_pause_rx(parent->ps2dev.serio);
 652         priv->pt_port = serio;
 653         serio_continue_rx(parent->ps2dev.serio);
 654
 655         return 0;
 656 }
 657
 658 static void synaptics_pt_stop(struct serio *serio)
 659 {
 660         struct psmouse *parent = serio_get_drvdata(serio->parent);
 661         struct synaptics_data *priv = parent->private;
 662
 663         serio_pause_rx(parent->ps2dev.serio);
 664         priv->pt_port = NULL;
 665         serio_continue_rx(parent->ps2dev.serio);
 666 }
 667
 668 static int synaptics_is_pt_packet(u8 *buf)
 669 {
 670         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 671 }
 672
 673 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 674 {
 675         struct psmouse *child = serio_get_drvdata(ptport);
 676
 677         if (child && child->state == PSMOUSE_ACTIVATED) {
 678                 serio_interrupt(ptport, packet[1], 0);
 679                 serio_interrupt(ptport, packet[4], 0);
 680                 serio_interrupt(ptport, packet[5], 0);
 681                 if (child->pktsize == 4)
 682                         serio_interrupt(ptport, packet[2], 0);
 683         } else {
 684                 serio_interrupt(ptport, packet[1], 0);
 685         }
 686 }
 687
 688 static void synaptics_pt_activate(struct psmouse *psmouse)
 689 {
 690         struct synaptics_data *priv = psmouse->private;
 691         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 692
 693         /* adjust the touchpad to child's choice of protocol */
 694         if (child) {
 695                 if (child->pktsize == 4)
 696                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 697                 else
 698                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 699
 700                 if (synaptics_mode_cmd(psmouse, priv->mode))
 701                         psmouse_warn(psmouse,
 702                                      "failed to switch guest protocol\n");
 703         }
 704 }
 705
 706 static void synaptics_pt_create(struct psmouse *psmouse)
 707 {
 708         struct serio *serio;
 709
 710         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 711         if (!serio) {
 712                 psmouse_err(psmouse,
 713                             "not enough memory for pass-through port\n");
 714                 return;
 715         }
 716
 717         serio->id.type = SERIO_PS_PSTHRU;
 718         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 719         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 720         serio->write = synaptics_pt_write;
 721         serio->start = synaptics_pt_start;
 722         serio->stop = synaptics_pt_stop;
 723         serio->parent = psmouse->ps2dev.serio;
 724
 725         psmouse->pt_activate = synaptics_pt_activate;
 726
 727         psmouse_info(psmouse, "serio: %s port at %s\n",
 728                      serio->name, psmouse->phys);
 729         serio_register_port(serio);
 730 }
 731
 732 /*****************************************************************************
 733  *      Functions to interpret the absolute mode packets
 734  ****************************************************************************/
 735
 736 static void synaptics_parse_agm(const u8 buf[],
 737                                 struct synaptics_data *priv,
 738                                 struct synaptics_hw_state *hw)
 739 {
 740         struct synaptics_hw_state *agm = &priv->agm;
 741         int agm_packet_type;
 742
 743         agm_packet_type = (buf[5] & 0x30) >> 4;
 744         switch (agm_packet_type) {
 745         case 1:
 746                 /* Gesture packet: (x, y, z) half resolution */
 747                 agm->w = hw->w;
 748                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 749                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 750                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 751                 break;
 752
 753         case 2:
 754                 /* AGM-CONTACT packet: we are only interested in the count */
 755                 priv->agm_count = buf[1];
 756                 break;
 757
 758         default:
 759                 break;
 760         }
 761 }
 762
 763 static void synaptics_parse_ext_buttons(const u8 buf[],
 764                                         struct synaptics_data *priv,
 765                                         struct synaptics_hw_state *hw)
 766 {
 767         unsigned int ext_bits =
 768                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 769         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 770
 771         hw->ext_buttons = buf[4] & ext_mask;
 772         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 773 }
 774
 775 static int synaptics_parse_hw_state(const u8 buf[],
 776                                     struct synaptics_data *priv,
 777                                     struct synaptics_hw_state *hw)
 778 {
 779         memset(hw, 0, sizeof(struct synaptics_hw_state));
 780
 781         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 782                 hw->w = (((buf[0] & 0x30) >> 2) |
 783                          ((buf[0] & 0x04) >> 1) |
 784                          ((buf[3] & 0x04) >> 2));
 785
 786                 if (synaptics_has_agm(priv) && hw->w == 2) {
 787                         synaptics_parse_agm(buf, priv, hw);
 788                         return 1;
 789                 }
 790
 791                 hw->x = (((buf[3] & 0x10) << 8) |
 792                          ((buf[1] & 0x0f) << 8) |
 793                          buf[4]);
 794                 hw->y = (((buf[3] & 0x20) << 7) |
 795                          ((buf[1] & 0xf0) << 4) |
 796                          buf[5]);
 797                 hw->z = buf[2];
 798
 799                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 800                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 801
 802                 if (priv->is_forcepad) {
 803                         /*
 804                          * ForcePads, like Clickpads, use middle button
 805                          * bits to report primary button clicks.
 806                          * Unfortunately they report primary button not
 807                          * only when user presses on the pad above certain
 808                          * threshold, but also when there are more than one
 809                          * finger on the touchpad, which interferes with
 810                          * out multi-finger gestures.
 811                          */
 812                         if (hw->z == 0) {
 813                                 /* No contacts */
 814                                 priv->press = priv->report_press = false;
 815                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 816                                 /*
 817                                  * Single-finger touch with pressure above
 818                                  * the threshold. If pressure stays long
 819                                  * enough, we'll start reporting primary
 820                                  * button. We rely on the device continuing
 821                                  * sending data even if finger does not
 822                                  * move.
 823                                  */
 824                                 if  (!priv->press) {
 825                                         priv->press_start = jiffies;
 826                                         priv->press = true;
 827                                 } else if (time_after(jiffies,
 828                                                 priv->press_start +
 829                                                         msecs_to_jiffies(50))) {
 830                                         priv->report_press = true;
 831                                 }
 832                         } else {
 833                                 priv->press = false;
 834                         }
 835
 836                         hw->left = priv->report_press;
 837
 838                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 839                         /*
 840                          * Clickpad's button is transmitted as middle button,
 841                          * however, since it is primary button, we will report
 842                          * it as BTN_LEFT.
 843                          */
 844                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 845
 846                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 847                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 848                         if (hw->w == 2)
 849                                 hw->scroll = (s8)buf[1];
 850                 }
 851
 852                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 853                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 854                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 855                 }
 856
 857                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 858                     ((buf[0] ^ buf[3]) & 0x02)) {
 859                         synaptics_parse_ext_buttons(buf, priv, hw);
 860                 }
 861         } else {
 862                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 863                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 864
 865                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 866                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 867
 868                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 869                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 870         }
 871
 872         /*
 873          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 874          * is used by some firmware to indicate a finger at the edge of
 875          * the touchpad whose precise position cannot be determined, so
 876          * convert these values to the maximum axis value.
 877          */
 878         if (hw->x > X_MAX_POSITIVE)
 879                 hw->x -= 1 << ABS_POS_BITS;
 880         else if (hw->x == X_MAX_POSITIVE)
 881                 hw->x = XMAX;
 882
 883         if (hw->y > Y_MAX_POSITIVE)
 884                 hw->y -= 1 << ABS_POS_BITS;
 885         else if (hw->y == Y_MAX_POSITIVE)
 886                 hw->y = YMAX;
 887
 888         return 0;
 889 }
 890
 891 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 892                                           bool active, int x, int y)
 893 {
 894         input_mt_slot(dev, slot);
 895         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 896         if (active) {
 897                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 898                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 899         }
 900 }
 901
 902 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 903                                           const struct synaptics_hw_state *a,
 904                                           const struct synaptics_hw_state *b,
 905                                           int num_fingers)
 906 {
 907         if (num_fingers >= 2) {
 908                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 909                                               min(a->y, b->y));
 910                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 911                                               max(a->y, b->y));
 912         } else if (num_fingers == 1) {
 913                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 914                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 915         } else {
 916                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 917                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 918         }
 919 }
 920
 921 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 922                                          const struct synaptics_hw_state *hw)
 923 {
 924         struct input_dev *dev = psmouse->dev;
 925         struct synaptics_data *priv = psmouse->private;
 926         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 927         int i;
 928
 929         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 930                 return;
 931
 932         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 933         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 934              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 935             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 936                 return;
 937
 938         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 939                 for (i = 0; i < ext_bits; i++) {
 940                         input_report_key(dev, BTN_0 + 2 * i,
 941                                 hw->ext_buttons & BIT(i));
 942                         input_report_key(dev, BTN_1 + 2 * i,
 943                                 hw->ext_buttons & BIT(i + ext_bits));
 944                 }
 945                 return;
 946         }
 947
 948         /*
 949          * This generation of touchpads has the trackstick buttons
 950          * physically wired to the touchpad. Re-route them through
 951          * the pass-through interface.
 952          */
 953         if (priv->pt_port) {
 954                 u8 pt_buttons;
 955
 956                 /* The trackstick expects at most 3 buttons */
 957                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 958                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 959                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 960
 961                 serio_interrupt(priv->pt_port,
 962                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 963                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 964         }
 965 }
 966
 967 static void synaptics_report_buttons(struct psmouse *psmouse,
 968                                      const struct synaptics_hw_state *hw)
 969 {
 970         struct input_dev *dev = psmouse->dev;
 971         struct synaptics_data *priv = psmouse->private;
 972
 973         input_report_key(dev, BTN_LEFT, hw->left);
 974         input_report_key(dev, BTN_RIGHT, hw->right);
 975
 976         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 977                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 978
 979         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 980                 input_report_key(dev, BTN_FORWARD, hw->up);
 981                 input_report_key(dev, BTN_BACK, hw->down);
 982         }
 983
 984         synaptics_report_ext_buttons(psmouse, hw);
 985 }
 986
 987 static void synaptics_report_mt_data(struct psmouse *psmouse,
 988                                      const struct synaptics_hw_state *sgm,
 989                                      int num_fingers)
 990 {
 991         struct input_dev *dev = psmouse->dev;
 992         struct synaptics_data *priv = psmouse->private;
 993         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 994         struct input_mt_pos pos[2];
 995         int slot[2], nsemi, i;
 996
 997         nsemi = clamp_val(num_fingers, 0, 2);
 998
 999         for (i = 0; i < nsemi; i++) {
1000                 pos[i].x = hw[i]->x;
1001                 pos[i].y = synaptics_invert_y(hw[i]->y);
1002         }
1003
1004         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1005
1006         for (i = 0; i < nsemi; i++) {
1007                 input_mt_slot(dev, slot[i]);
1008                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1009                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1010                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1011                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1012         }
1013
1014         input_mt_drop_unused(dev);
1015
1016         /* Don't use active slot count to generate BTN_TOOL events. */
1017         input_mt_report_pointer_emulation(dev, false);
1018
1019         /* Send the number of fingers reported by touchpad itself. */
1020         input_mt_report_finger_count(dev, num_fingers);
1021
1022         synaptics_report_buttons(psmouse, sgm);
1023
1024         input_sync(dev);
1025 }
1026
1027 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1028                                            struct synaptics_hw_state *sgm)
1029 {
1030         struct synaptics_data *priv = psmouse->private;
1031         int num_fingers;
1032
1033         /*
1034          * Update mt_state using the new finger count and current mt_state.
1035          */
1036         if (sgm->z == 0)
1037                 num_fingers = 0;
1038         else if (sgm->w >= 4)
1039                 num_fingers = 1;
1040         else if (sgm->w == 0)
1041                 num_fingers = 2;
1042         else if (sgm->w == 1)
1043                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1044         else
1045                 num_fingers = 4;
1046
1047         /* Send resulting input events to user space */
1048         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1049 }
1050
1051 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1052 {
1053         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1054                 return true;
1055
1056         /* Advanced gesture mode also sends multi finger data */
1057         return synaptics_has_agm(priv);
1058 }
1059
1060 /*
1061  *  called for each full received packet from the touchpad
1062  */
1063 static void synaptics_process_packet(struct psmouse *psmouse)
1064 {
1065         struct input_dev *dev = psmouse->dev;
1066         struct synaptics_data *priv = psmouse->private;
1067         struct synaptics_device_info *info = &priv->info;
1068         struct synaptics_hw_state hw;
1069         int num_fingers;
1070         int finger_width;
1071
1072         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1073                 return;
1074
1075         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1076                 synaptics_image_sensor_process(psmouse, &hw);
1077                 return;
1078         }
1079
1080         if (hw.scroll) {
1081                 priv->scroll += hw.scroll;
1082
1083                 while (priv->scroll >= 4) {
1084                         input_report_key(dev, BTN_BACK, !hw.down);
1085                         input_sync(dev);
1086                         input_report_key(dev, BTN_BACK, hw.down);
1087                         input_sync(dev);
1088                         priv->scroll -= 4;
1089                 }
1090                 while (priv->scroll <= -4) {
1091                         input_report_key(dev, BTN_FORWARD, !hw.up);
1092                         input_sync(dev);
1093                         input_report_key(dev, BTN_FORWARD, hw.up);
1094                         input_sync(dev);
1095                         priv->scroll += 4;
1096                 }
1097                 return;
1098         }
1099
1100         if (hw.z > 0 && hw.x > 1) {
1101                 num_fingers = 1;
1102                 finger_width = 5;
1103                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1104                         switch (hw.w) {
1105                         case 0 ... 1:
1106                                 if (synaptics_has_multifinger(priv))
1107                                         num_fingers = hw.w + 2;
1108                                 break;
1109                         case 2:
1110                                 if (SYN_MODEL_PEN(info->model_id))
1111                                         ;   /* Nothing, treat a pen as a single finger */
1112                                 break;
1113                         case 4 ... 15:
1114                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1115                                         finger_width = hw.w;
1116                                 break;
1117                         }
1118                 }
1119         } else {
1120                 num_fingers = 0;
1121                 finger_width = 0;
1122         }
1123
1124         if (cr48_profile_sensor) {
1125                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1126                 return;
1127         }
1128
1129         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1130                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1131                                               num_fingers);
1132
1133         /* Post events
1134          * BTN_TOUCH has to be first as mousedev relies on it when doing
1135          * absolute -> relative conversion
1136          */
1137         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1138         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1139
1140         if (num_fingers > 0) {
1141                 input_report_abs(dev, ABS_X, hw.x);
1142                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1143         }
1144         input_report_abs(dev, ABS_PRESSURE, hw.z);
1145
1146         if (SYN_CAP_PALMDETECT(info->capabilities))
1147                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1148
1149         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1150         if (synaptics_has_multifinger(priv)) {
1151                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1152                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1153         }
1154
1155         synaptics_report_buttons(psmouse, &hw);
1156
1157         input_sync(dev);
1158 }
1159
1160 static bool synaptics_validate_byte(struct psmouse *psmouse,
1161                                     int idx, enum synaptics_pkt_type pkt_type)
1162 {
1163         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1164         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1165         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1166         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1167         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1168         const u8 *packet = psmouse->packet;
1169
1170         if (idx < 0 || idx > 4)
1171                 return false;
1172
1173         switch (pkt_type) {
1174
1175         case SYN_NEWABS:
1176         case SYN_NEWABS_RELAXED:
1177                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1178
1179         case SYN_NEWABS_STRICT:
1180                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1181
1182         case SYN_OLDABS:
1183                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1184
1185         default:
1186                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1187                 return false;
1188         }
1189 }
1190
1191 static enum synaptics_pkt_type
1192 synaptics_detect_pkt_type(struct psmouse *psmouse)
1193 {
1194         int i;
1195
1196         for (i = 0; i < 5; i++) {
1197                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1198                         psmouse_info(psmouse, "using relaxed packet validation\n");
1199                         return SYN_NEWABS_RELAXED;
1200                 }
1201         }
1202
1203         return SYN_NEWABS_STRICT;
1204 }
1205
1206 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1207 {
1208         struct synaptics_data *priv = psmouse->private;
1209
1210         if (psmouse->pktcnt >= 6) { /* Full packet received */
1211                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1212                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1213
1214                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1215                     synaptics_is_pt_packet(psmouse->packet)) {
1216                         if (priv->pt_port)
1217                                 synaptics_pass_pt_packet(priv->pt_port,
1218                                                          psmouse->packet);
1219                 } else
1220                         synaptics_process_packet(psmouse);
1221
1222                 return PSMOUSE_FULL_PACKET;
1223         }
1224
1225         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1226                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1227 }
1228
1229 /*****************************************************************************
1230  *      Driver initialization/cleanup functions
1231  ****************************************************************************/
1232 static void set_abs_position_params(struct input_dev *dev,
1233                                     struct synaptics_device_info *info,
1234                                     int x_code, int y_code)
1235 {
1236         int x_min = info->x_min ?: XMIN_NOMINAL;
1237         int x_max = info->x_max ?: XMAX_NOMINAL;
1238         int y_min = info->y_min ?: YMIN_NOMINAL;
1239         int y_max = info->y_max ?: YMAX_NOMINAL;
1240         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1241                         SYN_REDUCED_FILTER_FUZZ : 0;
1242
1243         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1244         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1245         input_abs_set_res(dev, x_code, info->x_res);
1246         input_abs_set_res(dev, y_code, info->y_res);
1247 }
1248
1249 static int set_input_params(struct psmouse *psmouse,
1250                             struct synaptics_data *priv)
1251 {
1252         struct input_dev *dev = psmouse->dev;
1253         struct synaptics_device_info *info = &priv->info;
1254         int i;
1255         int error;
1256
1257         /* Reset default psmouse capabilities */
1258         __clear_bit(EV_REL, dev->evbit);
1259         bitmap_zero(dev->relbit, REL_CNT);
1260         bitmap_zero(dev->keybit, KEY_CNT);
1261
1262         /* Things that apply to both modes */
1263         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1264
1265         input_set_capability(dev, EV_KEY, BTN_LEFT);
1266
1267         /* Clickpads report only left button */
1268         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1269                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1270                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1271                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1272         }
1273
1274         if (!priv->absolute_mode) {
1275                 /* Relative mode */
1276                 input_set_capability(dev, EV_REL, REL_X);
1277                 input_set_capability(dev, EV_REL, REL_Y);
1278                 return 0;
1279         }
1280
1281         /* Absolute mode */
1282         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1283         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1284
1285         if (cr48_profile_sensor)
1286                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1287
1288         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1289                 set_abs_position_params(dev, info,
1290                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1291                 /* Image sensors can report per-contact pressure */
1292                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1293
1294                 error = input_mt_init_slots(dev, 2,
1295                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1296                 if (error)
1297                         return error;
1298
1299                 /* Image sensors can signal 4 and 5 finger clicks */
1300                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1301                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1302         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1303                 set_abs_position_params(dev, info,
1304                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1305                 /*
1306                  * Profile sensor in CR-48 tracks contacts reasonably well,
1307                  * other non-image sensors with AGM use semi-mt.
1308                  */
1309                 error = input_mt_init_slots(dev, 2,
1310                                             INPUT_MT_POINTER |
1311                                              (cr48_profile_sensor ?
1312                                               INPUT_MT_TRACK :
1313                                               INPUT_MT_SEMI_MT));
1314                 if (error)
1315                         return error;
1316
1317                 /*
1318                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1319                  * input_mt_report_pointer_emulation. But
1320                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1321                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1322                  * position. Let's re-initialize ABS_X/Y here.
1323                  */
1324                 if (!cr48_profile_sensor)
1325                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1326         }
1327
1328         if (SYN_CAP_PALMDETECT(info->capabilities))
1329                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1330
1331         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1332         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1333
1334         if (synaptics_has_multifinger(priv)) {
1335                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1336                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1337         }
1338
1339         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1340             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1341                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1342                 input_set_capability(dev, EV_KEY, BTN_BACK);
1343         }
1344
1345         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1346                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1347                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1348
1349         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1350                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1351                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1352                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1353                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1354         }
1355
1356         return 0;
1357 }
1358
1359 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1360                                               void *data, char *buf)
1361 {
1362         struct synaptics_data *priv = psmouse->private;
1363
1364         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1365 }
1366
1367 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1368                                              void *data, const char *buf,
1369                                              size_t len)
1370 {
1371         struct synaptics_data *priv = psmouse->private;
1372         unsigned int value;
1373         int err;
1374
1375         err = kstrtouint(buf, 10, &value);
1376         if (err)
1377                 return err;
1378
1379         if (value > 1)
1380                 return -EINVAL;
1381
1382         if (value == priv->disable_gesture)
1383                 return len;
1384
1385         priv->disable_gesture = value;
1386         if (value)
1387                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1388         else
1389                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1390
1391         if (synaptics_mode_cmd(psmouse, priv->mode))
1392                 return -EIO;
1393
1394         return len;
1395 }
1396
1397 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1398                     synaptics_show_disable_gesture,
1399                     synaptics_set_disable_gesture);
1400
1401 static void synaptics_disconnect(struct psmouse *psmouse)
1402 {
1403         struct synaptics_data *priv = psmouse->private;
1404
1405         /*
1406          * We might have left a breadcrumb when trying to
1407          * set up SMbus companion.
1408          */
1409         psmouse_smbus_cleanup(psmouse);
1410
1411         if (!priv->absolute_mode &&
1412                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1413                 device_remove_file(&psmouse->ps2dev.serio->dev,
1414                                    &psmouse_attr_disable_gesture.dattr);
1415
1416         synaptics_reset(psmouse);
1417         kfree(priv);
1418         psmouse->private = NULL;
1419 }
1420
1421 static int synaptics_reconnect(struct psmouse *psmouse)
1422 {
1423         struct synaptics_data *priv = psmouse->private;
1424         struct synaptics_device_info info;
1425         u8 param[2];
1426         int retry = 0;
1427         int error;
1428
1429         do {
1430                 psmouse_reset(psmouse);
1431                 if (retry) {
1432                         /*
1433                          * On some boxes, right after resuming, the touchpad
1434                          * needs some time to finish initializing (I assume
1435                          * it needs time to calibrate) and start responding
1436                          * to Synaptics-specific queries, so let's wait a
1437                          * bit.
1438                          */
1439                         ssleep(1);
1440                 }
1441                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1442                 error = synaptics_detect(psmouse, 0);
1443         } while (error && ++retry < 3);
1444
1445         if (error)
1446                 return error;
1447
1448         if (retry > 1)
1449                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1450
1451         error = synaptics_query_hardware(psmouse, &info);
1452         if (error) {
1453                 psmouse_err(psmouse, "Unable to query device.\n");
1454                 return error;
1455         }
1456
1457         error = synaptics_set_mode(psmouse);
1458         if (error) {
1459                 psmouse_err(psmouse, "Unable to initialize device.\n");
1460                 return error;
1461         }
1462
1463         if (info.identity != priv->info.identity ||
1464             info.model_id != priv->info.model_id ||
1465             info.capabilities != priv->info.capabilities ||
1466             info.ext_cap != priv->info.ext_cap) {
1467                 psmouse_err(psmouse,
1468                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1469                             priv->info.identity, info.identity,
1470                             priv->info.model_id, info.model_id,
1471                             priv->info.capabilities, info.capabilities,
1472                             priv->info.ext_cap, info.ext_cap);
1473                 return -ENXIO;
1474         }
1475
1476         return 0;
1477 }
1478
1479 static bool impaired_toshiba_kbc;
1480
1481 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1482 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1483         {
1484                 /* Toshiba Satellite */
1485                 .matches = {
1486                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1487                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1488                 },
1489         },
1490         {
1491                 /* Toshiba Dynabook */
1492                 .matches = {
1493                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1494                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1495                 },
1496         },
1497         {
1498                 /* Toshiba Portege M300 */
1499                 .matches = {
1500                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1501                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1502                 },
1503
1504         },
1505         {
1506                 /* Toshiba Portege M300 */
1507                 .matches = {
1508                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1509                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1510                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1511                 },
1512
1513         },
1514 #endif
1515         { }
1516 };
1517
1518 static bool broken_olpc_ec;
1519
1520 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1521 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1522         {
1523                 /* OLPC XO-1 or XO-1.5 */
1524                 .matches = {
1525                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1526                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1527                 },
1528         },
1529 #endif
1530         { }
1531 };
1532
1533 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1534 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1535         {
1536                 /* Cr-48 Chromebook (Codename Mario) */
1537                 .matches = {
1538                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1539                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1540                 },
1541         },
1542 #endif
1543         { }
1544 };
1545
1546 void __init synaptics_module_init(void)
1547 {
1548         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1549         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1550         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1551 }
1552
1553 static int synaptics_init_ps2(struct psmouse *psmouse,
1554                               struct synaptics_device_info *info,
1555                               bool absolute_mode)
1556 {
1557         struct synaptics_data *priv;
1558         int err;
1559
1560         synaptics_apply_quirks(psmouse, info);
1561
1562         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1563         if (!priv)
1564                 return -ENOMEM;
1565
1566         priv->info = *info;
1567         priv->absolute_mode = absolute_mode;
1568         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1569                 priv->disable_gesture = true;
1570
1571         /*
1572          * Unfortunately ForcePad capability is not exported over PS/2,
1573          * so we have to resort to checking PNP IDs.
1574          */
1575         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1576
1577         err = synaptics_set_mode(psmouse);
1578         if (err) {
1579                 psmouse_err(psmouse, "Unable to initialize device.\n");
1580                 goto init_fail;
1581         }
1582
1583         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1584                                         SYN_NEWABS : SYN_OLDABS;
1585
1586         psmouse_info(psmouse,
1587                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1588                      SYN_ID_MODEL(info->identity),
1589                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1590                      info->model_id,
1591                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1592                      info->ext_cap_10, info->board_id, info->firmware_id);
1593
1594         err = set_input_params(psmouse, priv);
1595         if (err) {
1596                 psmouse_err(psmouse,
1597                             "failed to set up capabilities: %d\n", err);
1598                 goto init_fail;
1599         }
1600
1601         /*
1602          * Encode touchpad model so that it can be used to set
1603          * input device->id.version and be visible to userspace.
1604          * Because version is __u16 we have to drop something.
1605          * Hardware info bits seem to be good candidates as they
1606          * are documented to be for Synaptics corp. internal use.
1607          */
1608         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1609                           (info->model_id & 0x000000ff);
1610
1611         if (absolute_mode) {
1612                 psmouse->protocol_handler = synaptics_process_byte;
1613                 psmouse->pktsize = 6;
1614         } else {
1615                 /* Relative mode follows standard PS/2 mouse protocol */
1616                 psmouse->protocol_handler = psmouse_process_byte;
1617                 psmouse->pktsize = 3;
1618         }
1619
1620         psmouse->set_rate = synaptics_set_rate;
1621         psmouse->disconnect = synaptics_disconnect;
1622         psmouse->reconnect = synaptics_reconnect;
1623         psmouse->cleanup = synaptics_reset;
1624         /* Synaptics can usually stay in sync without extra help */
1625         psmouse->resync_time = 0;
1626
1627         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1628                 synaptics_pt_create(psmouse);
1629
1630         /*
1631          * Toshiba's KBC seems to have trouble handling data from
1632          * Synaptics at full rate.  Switch to a lower rate (roughly
1633          * the same rate as a standard PS/2 mouse).
1634          */
1635         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1636                 psmouse_info(psmouse,
1637                              "Toshiba %s detected, limiting rate to 40pps.\n",
1638                              dmi_get_system_info(DMI_PRODUCT_NAME));
1639                 psmouse->rate = 40;
1640         }
1641
1642         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1643                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1644                                          &psmouse_attr_disable_gesture.dattr);
1645                 if (err) {
1646                         psmouse_err(psmouse,
1647                                     "Failed to create disable_gesture attribute (%d)",
1648                                     err);
1649                         goto init_fail;
1650                 }
1651         }
1652
1653         return 0;
1654
1655  init_fail:
1656         kfree(priv);
1657         return err;
1658 }
1659
1660 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1661 {
1662         struct synaptics_device_info info;
1663         int error;
1664
1665         psmouse_reset(psmouse);
1666
1667         error = synaptics_query_hardware(psmouse, &info);
1668         if (error) {
1669                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1670                 return error;
1671         }
1672
1673         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1674 }
1675
1676 int synaptics_init_absolute(struct psmouse *psmouse)
1677 {
1678         return __synaptics_init(psmouse, true);
1679 }
1680
1681 int synaptics_init_relative(struct psmouse *psmouse)
1682 {
1683         return __synaptics_init(psmouse, false);
1684 }
1685
1686 static int synaptics_setup_ps2(struct psmouse *psmouse,
1687                                struct synaptics_device_info *info)
1688 {
1689         bool absolute_mode = true;
1690         int error;
1691
1692         /*
1693          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1694          * packet spew overloads the EC such that key presses on the keyboard
1695          * are missed.  Given that, don't even attempt to use Absolute mode.
1696          * Relative mode seems to work just fine.
1697          */
1698         if (broken_olpc_ec) {
1699                 psmouse_info(psmouse,
1700                              "OLPC XO detected, forcing relative protocol.\n");
1701                 absolute_mode = false;
1702         }
1703
1704         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1705         if (error)
1706                 return error;
1707
1708         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1709 }
1710
1711 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1712
1713 void __init synaptics_module_init(void)
1714 {
1715 }
1716
1717 static int __maybe_unused
1718 synaptics_setup_ps2(struct psmouse *psmouse,
1719                     struct synaptics_device_info *info)
1720 {
1721         return -ENOSYS;
1722 }
1723
1724 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1725
1726 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1727
1728 /*
1729  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1730  * provides a better bandwidth and allow a better control of the touchpads.
1731  * This is used to decide if we need to use this bus or not.
1732  */
1733 enum {
1734         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1735         SYNAPTICS_INTERTOUCH_OFF,
1736         SYNAPTICS_INTERTOUCH_ON,
1737 };
1738
1739 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1740                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1741 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1742 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1743
1744 static int synaptics_create_intertouch(struct psmouse *psmouse,
1745                                        struct synaptics_device_info *info,
1746                                        bool leave_breadcrumbs)
1747 {
1748         bool topbuttonpad =
1749                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1750                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1751         const struct rmi_device_platform_data pdata = {
1752                 .sensor_pdata = {
1753                         .sensor_type = rmi_sensor_touchpad,
1754                         .axis_align.flip_y = true,
1755                         .kernel_tracking = false,
1756                         .topbuttonpad = topbuttonpad,
1757                 },
1758                 .f30_data = {
1759                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1760                         .trackstick_buttons =
1761                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1762                 },
1763         };
1764         const struct i2c_board_info intertouch_board = {
1765                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1766                 .flags = I2C_CLIENT_HOST_NOTIFY,
1767         };
1768
1769         return psmouse_smbus_init(psmouse, &intertouch_board,
1770                                   &pdata, sizeof(pdata), true,
1771                                   leave_breadcrumbs);
1772 }
1773
1774 /**
1775  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1776  * and decides to instantiate a SMBus InterTouch device.
1777  */
1778 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1779                                       struct synaptics_device_info *info,
1780                                       bool leave_breadcrumbs)
1781 {
1782         int error;
1783
1784         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1785                 return -ENXIO;
1786
1787         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1788                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1789                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1790
1791                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1792                                 psmouse_info(psmouse,
1793                                              "Your touchpad (%s) says it can support a different bus. "
1794                                              "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",
1795                                              psmouse->ps2dev.serio->firmware_id);
1796
1797                         return -ENXIO;
1798                 }
1799         }
1800
1801         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1802
1803         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1804         if (error) {
1805                 if (error == -EAGAIN)
1806                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1807                 else
1808                         psmouse_err(psmouse, "unable to create intertouch device\n");
1809
1810                 return error;
1811         }
1812
1813         return 0;
1814 }
1815
1816 int synaptics_init_smbus(struct psmouse *psmouse)
1817 {
1818         struct synaptics_device_info info;
1819         int error;
1820
1821         psmouse_reset(psmouse);
1822
1823         error = synaptics_query_hardware(psmouse, &info);
1824         if (error) {
1825                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1826                 return error;
1827         }
1828
1829         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1830                 return -ENXIO;
1831
1832         return synaptics_create_intertouch(psmouse, &info, false);
1833 }
1834
1835 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1836
1837 static int __maybe_unused
1838 synaptics_setup_intertouch(struct psmouse *psmouse,
1839                            struct synaptics_device_info *info,
1840                            bool leave_breadcrumbs)
1841 {
1842         return -ENOSYS;
1843 }
1844
1845 int synaptics_init_smbus(struct psmouse *psmouse)
1846 {
1847         return -ENOSYS;
1848 }
1849
1850 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1851
1852 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1853     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1854
1855 int synaptics_init(struct psmouse *psmouse)
1856 {
1857         struct synaptics_device_info info;
1858         int error;
1859         int retval;
1860
1861         psmouse_reset(psmouse);
1862
1863         error = synaptics_query_hardware(psmouse, &info);
1864         if (error) {
1865                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1866                 return error;
1867         }
1868
1869         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1870                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1871                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1872                     /* Forcepads need F21, which is not ready */
1873                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1874                         psmouse_warn(psmouse,
1875                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1876                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1877                 }
1878
1879                 error = synaptics_setup_intertouch(psmouse, &info, true);
1880                 if (!error)
1881                         return PSMOUSE_SYNAPTICS_SMBUS;
1882         }
1883
1884         retval = synaptics_setup_ps2(psmouse, &info);
1885         if (retval < 0) {
1886                 /*
1887                  * Not using any flavor of Synaptics support, so clean up
1888                  * SMbus breadcrumbs, if any.
1889                  */
1890                 psmouse_smbus_cleanup(psmouse);
1891         }
1892
1893         return retval;
1894 }
1895
1896 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1897
1898 int synaptics_init(struct psmouse *psmouse)
1899 {
1900         return -ENOSYS;
1901 }
1902
1903 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */