drivers/input/mouse/synaptics.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Synaptics TouchPad PS/2 mouse driver
   4  *
   5  *   2003 Dmitry Torokhov <dtor@mail.ru>
   6  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   7  *     for explaining various Synaptics quirks.
   8  *
   9  *   2003 Peter Osterlund <petero2@telia.com>
  10  *     Ported to 2.5 input device infrastructure.
  11  *
  12  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  13  *     start merging tpconfig and gpm code to a xfree-input module
  14  *     adding some changes and extensions (ex. 3rd and 4th button)
  15  *
  16  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  17  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  18  *     code for the special synaptics commands (from the tpconfig-source)
  19  *
  20  * Trademarks are the property of their respective owners.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/delay.h>
  25 #include <linux/dmi.h>
  26 #include <linux/input/mt.h>
  27 #include <linux/serio.h>
  28 #include <linux/libps2.h>
  29 #include <linux/rmi.h>
  30 #include <linux/i2c.h>
  31 #include <linux/slab.h>
  32 #include "psmouse.h"
  33 #include "synaptics.h"
  34
  35 /*
  36  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  37  * section 2.3.2, which says that they should be valid regardless of the
  38  * actual size of the sensor.
  39  * Note that newer firmware allows querying device for maximum useable
  40  * coordinates.
  41  */
  42 #define XMIN 0
  43 #define XMAX 6143
  44 #define YMIN 0
  45 #define YMAX 6143
  46 #define XMIN_NOMINAL 1472
  47 #define XMAX_NOMINAL 5472
  48 #define YMIN_NOMINAL 1408
  49 #define YMAX_NOMINAL 4448
  50
  51 /* Size in bits of absolute position values reported by the hardware */
  52 #define ABS_POS_BITS 13
  53
  54 /*
  55  * These values should represent the absolute maximum value that will
  56  * be reported for a positive position value. Some Synaptics firmware
  57  * uses this value to indicate a finger near the edge of the touchpad
  58  * whose precise position cannot be determined.
  59  *
  60  * At least one touchpad is known to report positions in excess of this
  61  * value which are actually negative values truncated to the 13-bit
  62  * reporting range. These values have never been observed to be lower
  63  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  64  * negative and any other value as positive.
  65  */
  66 #define X_MAX_POSITIVE 8176
  67 #define Y_MAX_POSITIVE 8176
  68
  69 /* maximum ABS_MT_POSITION displacement (in mm) */
  70 #define DMAX 10
  71
  72 /*****************************************************************************
  73  *      Stuff we need even when we do not want native Synaptics support
  74  ****************************************************************************/
  75
  76 /*
  77  * Set the synaptics touchpad mode byte by special commands
  78  */
  79 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
  80 {
  81         u8 param[1];
  82         int error;
  83
  84         error = ps2_sliced_command(&psmouse->ps2dev, mode);
  85         if (error)
  86                 return error;
  87
  88         param[0] = SYN_PS_SET_MODE2;
  89         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
  90         if (error)
  91                 return error;
  92
  93         return 0;
  94 }
  95
  96 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  97 {
  98         struct ps2dev *ps2dev = &psmouse->ps2dev;
  99         u8 param[4] = { 0 };
 100
 101         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 104         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 105         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 106
 107         if (param[1] != 0x47)
 108                 return -ENODEV;
 109
 110         if (set_properties) {
 111                 psmouse->vendor = "Synaptics";
 112                 psmouse->name = "TouchPad";
 113         }
 114
 115         return 0;
 116 }
 117
 118 void synaptics_reset(struct psmouse *psmouse)
 119 {
 120         /* reset touchpad back to relative mode, gestures enabled */
 121         synaptics_mode_cmd(psmouse, 0);
 122 }
 123
 124 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
 125     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
 126
 127 /* This list has been kindly provided by Synaptics. */
 128 static const char * const topbuttonpad_pnp_ids[] = {
 129         "LEN0017",
 130         "LEN0018",
 131         "LEN0019",
 132         "LEN0023",
 133         "LEN002A",
 134         "LEN002B",
 135         "LEN002C",
 136         "LEN002D",
 137         "LEN002E",
 138         "LEN0033", /* Helix */
 139         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 140         "LEN0035", /* X240 */
 141         "LEN0036", /* T440 */
 142         "LEN0037", /* X1 Carbon 2nd */
 143         "LEN0038",
 144         "LEN0039", /* T440s */
 145         "LEN0041",
 146         "LEN0042", /* Yoga */
 147         "LEN0045",
 148         "LEN0047",
 149         "LEN2000", /* S540 */
 150         "LEN2001", /* Edge E431 */
 151         "LEN2002", /* Edge E531 */
 152         "LEN2003",
 153         "LEN2004", /* L440 */
 154         "LEN2005",
 155         "LEN2006", /* Edge E440/E540 */
 156         "LEN2007",
 157         "LEN2008",
 158         "LEN2009",
 159         "LEN200A",
 160         "LEN200B",
 161         NULL
 162 };
 163
 164 static const char * const smbus_pnp_ids[] = {
 165         /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
 166         "LEN0048", /* X1 Carbon 3 */
 167         "LEN0046", /* X250 */
 168         "LEN0049", /* Yoga 11e */
 169         "LEN004a", /* W541 */
 170         "LEN005b", /* P50 */
 171         "LEN005e", /* T560 */
 172         "LEN006c", /* T470s */
 173         "LEN0071", /* T480 */
 174         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 175         "LEN0073", /* X1 Carbon G5 (Elantech) */
 176         "LEN0091", /* X1 Carbon 6 */
 177         "LEN0092", /* X1 Carbon 6 */
 178         "LEN0093", /* T480 */
 179         "LEN0096", /* X280 */
 180         "LEN0097", /* X280 -> ALPS trackpoint */
 181         "LEN009b", /* T580 */
 182         "LEN200f", /* T450s */
 183         "LEN2044", /* L470  */
 184         "LEN2054", /* E480 */
 185         "LEN2055", /* E580 */
 186         "SYN3052", /* HP EliteBook 840 G4 */
 187         "SYN3221", /* HP 15-ay000 */
 188         "SYN323d", /* HP Spectre X360 13-w013dx */
 189         "SYN3257", /* HP Envy 13-ad105ng */
 190         NULL
 191 };
 192
 193 static const char * const forcepad_pnp_ids[] = {
 194         "SYN300D",
 195         "SYN3014",
 196         NULL
 197 };
 198
 199 /*
 200  * Send a command to the synaptics touchpad by special commands
 201  */
 202 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 203 {
 204         int error;
 205
 206         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 207         if (error)
 208                 return error;
 209
 210         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 211         if (error)
 212                 return error;
 213
 214         return 0;
 215 }
 216
 217 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 218 {
 219         int error;
 220         union {
 221                 __be32 be_val;
 222                 char buf[4];
 223         } resp = { 0 };
 224
 225         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 226         if (error)
 227                 return error;
 228
 229         *val = be32_to_cpu(resp.be_val);
 230         return 0;
 231 }
 232
 233 /*
 234  * Identify Touchpad
 235  * See also the SYN_ID_* macros
 236  */
 237 static int synaptics_identify(struct psmouse *psmouse,
 238                               struct synaptics_device_info *info)
 239 {
 240         int error;
 241
 242         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 243         if (error)
 244                 return error;
 245
 246         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 247 }
 248
 249 /*
 250  * Read the model-id bytes from the touchpad
 251  * see also SYN_MODEL_* macros
 252  */
 253 static int synaptics_model_id(struct psmouse *psmouse,
 254                               struct synaptics_device_info *info)
 255 {
 256         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 257 }
 258
 259 /*
 260  * Read the firmware id from the touchpad
 261  */
 262 static int synaptics_firmware_id(struct psmouse *psmouse,
 263                                  struct synaptics_device_info *info)
 264 {
 265         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 266                                    &info->firmware_id);
 267 }
 268
 269 /*
 270  * Read the board id and the "More Extended Queries" from the touchpad
 271  * The board id is encoded in the "QUERY MODES" response
 272  */
 273 static int synaptics_query_modes(struct psmouse *psmouse,
 274                                  struct synaptics_device_info *info)
 275 {
 276         u8 bid[3];
 277         int error;
 278
 279         /* firmwares prior 7.5 have no board_id encoded */
 280         if (SYN_ID_FULL(info->identity) < 0x705)
 281                 return 0;
 282
 283         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 284         if (error)
 285                 return error;
 286
 287         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 288
 289         if (SYN_MEXT_CAP_BIT(bid[0]))
 290                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 291                                            &info->ext_cap_10);
 292
 293         return 0;
 294 }
 295
 296 /*
 297  * Read the capability-bits from the touchpad
 298  * see also the SYN_CAP_* macros
 299  */
 300 static int synaptics_capability(struct psmouse *psmouse,
 301                                 struct synaptics_device_info *info)
 302 {
 303         int error;
 304
 305         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 306                                     &info->capabilities);
 307         if (error)
 308                 return error;
 309
 310         info->ext_cap = info->ext_cap_0c = 0;
 311
 312         /*
 313          * Older firmwares had submodel ID fixed to 0x47
 314          */
 315         if (SYN_ID_FULL(info->identity) < 0x705 &&
 316             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 317                 return -ENXIO;
 318         }
 319
 320         /*
 321          * Unless capExtended is set the rest of the flags should be ignored
 322          */
 323         if (!SYN_CAP_EXTENDED(info->capabilities))
 324                 info->capabilities = 0;
 325
 326         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 327                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 328                                             &info->ext_cap);
 329                 if (error) {
 330                         psmouse_warn(psmouse,
 331                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 332                 } else {
 333                         /*
 334                          * if nExtBtn is greater than 8 it should be considered
 335                          * invalid and treated as 0
 336                          */
 337                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 338                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 339                 }
 340         }
 341
 342         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 343                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 344                                             &info->ext_cap_0c);
 345                 if (error)
 346                         psmouse_warn(psmouse,
 347                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 348         }
 349
 350         return 0;
 351 }
 352
 353 /*
 354  * Read touchpad resolution and maximum reported coordinates
 355  * Resolution is left zero if touchpad does not support the query
 356  */
 357 static int synaptics_resolution(struct psmouse *psmouse,
 358                                 struct synaptics_device_info *info)
 359 {
 360         u8 resp[3];
 361         int error;
 362
 363         if (SYN_ID_MAJOR(info->identity) < 4)
 364                 return 0;
 365
 366         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 367         if (!error) {
 368                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 369                         info->x_res = resp[0]; /* x resolution in units/mm */
 370                         info->y_res = resp[2]; /* y resolution in units/mm */
 371                 }
 372         }
 373
 374         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 375             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 376                 error = synaptics_send_cmd(psmouse,
 377                                            SYN_QUE_EXT_MAX_COORDS, resp);
 378                 if (error) {
 379                         psmouse_warn(psmouse,
 380                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 381                 } else {
 382                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 383                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 384                         psmouse_info(psmouse,
 385                                      "queried max coordinates: x [..%d], y [..%d]\n",
 386                                      info->x_max, info->y_max);
 387                 }
 388         }
 389
 390         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 391             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 392              /*
 393               * Firmware v8.1 does not report proper number of extended
 394               * capabilities, but has been proven to report correct min
 395               * coordinates.
 396               */
 397              SYN_ID_FULL(info->identity) == 0x801)) {
 398                 error = synaptics_send_cmd(psmouse,
 399                                            SYN_QUE_EXT_MIN_COORDS, resp);
 400                 if (error) {
 401                         psmouse_warn(psmouse,
 402                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 403                 } else {
 404                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 405                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 406                         psmouse_info(psmouse,
 407                                      "queried min coordinates: x [%d..], y [%d..]\n",
 408                                      info->x_min, info->y_min);
 409                 }
 410         }
 411
 412         return 0;
 413 }
 414
 415 static int synaptics_query_hardware(struct psmouse *psmouse,
 416                                     struct synaptics_device_info *info)
 417 {
 418         int error;
 419
 420         memset(info, 0, sizeof(*info));
 421
 422         error = synaptics_identify(psmouse, info);
 423         if (error)
 424                 return error;
 425
 426         error = synaptics_model_id(psmouse, info);
 427         if (error)
 428                 return error;
 429
 430         error = synaptics_firmware_id(psmouse, info);
 431         if (error)
 432                 return error;
 433
 434         error = synaptics_query_modes(psmouse, info);
 435         if (error)
 436                 return error;
 437
 438         error = synaptics_capability(psmouse, info);
 439         if (error)
 440                 return error;
 441
 442         error = synaptics_resolution(psmouse, info);
 443         if (error)
 444                 return error;
 445
 446         return 0;
 447 }
 448
 449 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 450
 451 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 452
 453 static bool cr48_profile_sensor;
 454
 455 #define ANY_BOARD_ID 0
 456 struct min_max_quirk {
 457         const char * const *pnp_ids;
 458         struct {
 459                 u32 min, max;
 460         } board_id;
 461         u32 x_min, x_max, y_min, y_max;
 462 };
 463
 464 static const struct min_max_quirk min_max_pnpid_table[] = {
 465         {
 466                 (const char * const []){"LEN0033", NULL},
 467                 {ANY_BOARD_ID, ANY_BOARD_ID},
 468                 1024, 5052, 2258, 4832
 469         },
 470         {
 471                 (const char * const []){"LEN0042", NULL},
 472                 {ANY_BOARD_ID, ANY_BOARD_ID},
 473                 1232, 5710, 1156, 4696
 474         },
 475         {
 476                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 477                                         "LEN0039", "LEN2002", "LEN2004",
 478                                         NULL},
 479                 {ANY_BOARD_ID, 2961},
 480                 1024, 5112, 2024, 4832
 481         },
 482         {
 483                 (const char * const []){"LEN2000", NULL},
 484                 {ANY_BOARD_ID, ANY_BOARD_ID},
 485                 1024, 5113, 2021, 4832
 486         },
 487         {
 488                 (const char * const []){"LEN2001", NULL},
 489                 {ANY_BOARD_ID, ANY_BOARD_ID},
 490                 1024, 5022, 2508, 4832
 491         },
 492         {
 493                 (const char * const []){"LEN2006", NULL},
 494                 {2691, 2691},
 495                 1024, 5045, 2457, 4832
 496         },
 497         {
 498                 (const char * const []){"LEN2006", NULL},
 499                 {ANY_BOARD_ID, ANY_BOARD_ID},
 500                 1264, 5675, 1171, 4688
 501         },
 502         { }
 503 };
 504
 505 /*****************************************************************************
 506  *      Synaptics communications functions
 507  ****************************************************************************/
 508
 509 /*
 510  * Synaptics touchpads report the y coordinate from bottom to top, which is
 511  * opposite from what userspace expects.
 512  * This function is used to invert y before reporting.
 513  */
 514 static int synaptics_invert_y(int y)
 515 {
 516         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 517 }
 518
 519 /*
 520  * Apply quirk(s) if the hardware matches
 521  */
 522 static void synaptics_apply_quirks(struct psmouse *psmouse,
 523                                    struct synaptics_device_info *info)
 524 {
 525         int i;
 526
 527         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 528                 if (!psmouse_matches_pnp_id(psmouse,
 529                                             min_max_pnpid_table[i].pnp_ids))
 530                         continue;
 531
 532                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 533                     info->board_id < min_max_pnpid_table[i].board_id.min)
 534                         continue;
 535
 536                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 537                     info->board_id > min_max_pnpid_table[i].board_id.max)
 538                         continue;
 539
 540                 info->x_min = min_max_pnpid_table[i].x_min;
 541                 info->x_max = min_max_pnpid_table[i].x_max;
 542                 info->y_min = min_max_pnpid_table[i].y_min;
 543                 info->y_max = min_max_pnpid_table[i].y_max;
 544                 psmouse_info(psmouse,
 545                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 546                              info->x_min, info->x_max,
 547                              info->y_min, info->y_max);
 548                 break;
 549         }
 550 }
 551
 552 static bool synaptics_has_agm(struct synaptics_data *priv)
 553 {
 554         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 555                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 556 }
 557
 558 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 559 {
 560         static u8 param = 0xc8;
 561         int error;
 562
 563         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 564         if (error)
 565                 return error;
 566
 567         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 568         if (error)
 569                 return error;
 570
 571         return 0;
 572 }
 573
 574 static int synaptics_set_mode(struct psmouse *psmouse)
 575 {
 576         struct synaptics_data *priv = psmouse->private;
 577         int error;
 578
 579         priv->mode = 0;
 580         if (priv->absolute_mode)
 581                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 582         if (priv->disable_gesture)
 583                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 584         if (psmouse->rate >= 80)
 585                 priv->mode |= SYN_BIT_HIGH_RATE;
 586         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 587                 priv->mode |= SYN_BIT_W_MODE;
 588
 589         error = synaptics_mode_cmd(psmouse, priv->mode);
 590         if (error)
 591                 return error;
 592
 593         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 594                 error = synaptics_set_advanced_gesture_mode(psmouse);
 595                 if (error) {
 596                         psmouse_err(psmouse,
 597                                     "Advanced gesture mode init failed: %d\n",
 598                                     error);
 599                         return error;
 600                 }
 601         }
 602
 603         return 0;
 604 }
 605
 606 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 607 {
 608         struct synaptics_data *priv = psmouse->private;
 609
 610         if (rate >= 80) {
 611                 priv->mode |= SYN_BIT_HIGH_RATE;
 612                 psmouse->rate = 80;
 613         } else {
 614                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 615                 psmouse->rate = 40;
 616         }
 617
 618         synaptics_mode_cmd(psmouse, priv->mode);
 619 }
 620
 621 /*****************************************************************************
 622  *      Synaptics pass-through PS/2 port support
 623  ****************************************************************************/
 624 static int synaptics_pt_write(struct serio *serio, u8 c)
 625 {
 626         struct psmouse *parent = serio_get_drvdata(serio->parent);
 627         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 628         int error;
 629
 630         error = ps2_sliced_command(&parent->ps2dev, c);
 631         if (error)
 632                 return error;
 633
 634         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 635         if (error)
 636                 return error;
 637
 638         return 0;
 639 }
 640
 641 static int synaptics_pt_start(struct serio *serio)
 642 {
 643         struct psmouse *parent = serio_get_drvdata(serio->parent);
 644         struct synaptics_data *priv = parent->private;
 645
 646         serio_pause_rx(parent->ps2dev.serio);
 647         priv->pt_port = serio;
 648         serio_continue_rx(parent->ps2dev.serio);
 649
 650         return 0;
 651 }
 652
 653 static void synaptics_pt_stop(struct serio *serio)
 654 {
 655         struct psmouse *parent = serio_get_drvdata(serio->parent);
 656         struct synaptics_data *priv = parent->private;
 657
 658         serio_pause_rx(parent->ps2dev.serio);
 659         priv->pt_port = NULL;
 660         serio_continue_rx(parent->ps2dev.serio);
 661 }
 662
 663 static int synaptics_is_pt_packet(u8 *buf)
 664 {
 665         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 666 }
 667
 668 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 669 {
 670         struct psmouse *child = serio_get_drvdata(ptport);
 671
 672         if (child && child->state == PSMOUSE_ACTIVATED) {
 673                 serio_interrupt(ptport, packet[1], 0);
 674                 serio_interrupt(ptport, packet[4], 0);
 675                 serio_interrupt(ptport, packet[5], 0);
 676                 if (child->pktsize == 4)
 677                         serio_interrupt(ptport, packet[2], 0);
 678         } else {
 679                 serio_interrupt(ptport, packet[1], 0);
 680         }
 681 }
 682
 683 static void synaptics_pt_activate(struct psmouse *psmouse)
 684 {
 685         struct synaptics_data *priv = psmouse->private;
 686         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 687
 688         /* adjust the touchpad to child's choice of protocol */
 689         if (child) {
 690                 if (child->pktsize == 4)
 691                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 692                 else
 693                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 694
 695                 if (synaptics_mode_cmd(psmouse, priv->mode))
 696                         psmouse_warn(psmouse,
 697                                      "failed to switch guest protocol\n");
 698         }
 699 }
 700
 701 static void synaptics_pt_create(struct psmouse *psmouse)
 702 {
 703         struct serio *serio;
 704
 705         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 706         if (!serio) {
 707                 psmouse_err(psmouse,
 708                             "not enough memory for pass-through port\n");
 709                 return;
 710         }
 711
 712         serio->id.type = SERIO_PS_PSTHRU;
 713         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 714         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
 715         serio->write = synaptics_pt_write;
 716         serio->start = synaptics_pt_start;
 717         serio->stop = synaptics_pt_stop;
 718         serio->parent = psmouse->ps2dev.serio;
 719
 720         psmouse->pt_activate = synaptics_pt_activate;
 721
 722         psmouse_info(psmouse, "serio: %s port at %s\n",
 723                      serio->name, psmouse->phys);
 724         serio_register_port(serio);
 725 }
 726
 727 /*****************************************************************************
 728  *      Functions to interpret the absolute mode packets
 729  ****************************************************************************/
 730
 731 static void synaptics_parse_agm(const u8 buf[],
 732                                 struct synaptics_data *priv,
 733                                 struct synaptics_hw_state *hw)
 734 {
 735         struct synaptics_hw_state *agm = &priv->agm;
 736         int agm_packet_type;
 737
 738         agm_packet_type = (buf[5] & 0x30) >> 4;
 739         switch (agm_packet_type) {
 740         case 1:
 741                 /* Gesture packet: (x, y, z) half resolution */
 742                 agm->w = hw->w;
 743                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 744                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 745                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 746                 break;
 747
 748         case 2:
 749                 /* AGM-CONTACT packet: we are only interested in the count */
 750                 priv->agm_count = buf[1];
 751                 break;
 752
 753         default:
 754                 break;
 755         }
 756 }
 757
 758 static void synaptics_parse_ext_buttons(const u8 buf[],
 759                                         struct synaptics_data *priv,
 760                                         struct synaptics_hw_state *hw)
 761 {
 762         unsigned int ext_bits =
 763                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 764         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 765
 766         hw->ext_buttons = buf[4] & ext_mask;
 767         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 768 }
 769
 770 static int synaptics_parse_hw_state(const u8 buf[],
 771                                     struct synaptics_data *priv,
 772                                     struct synaptics_hw_state *hw)
 773 {
 774         memset(hw, 0, sizeof(struct synaptics_hw_state));
 775
 776         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 777                 hw->w = (((buf[0] & 0x30) >> 2) |
 778                          ((buf[0] & 0x04) >> 1) |
 779                          ((buf[3] & 0x04) >> 2));
 780
 781                 if (synaptics_has_agm(priv) && hw->w == 2) {
 782                         synaptics_parse_agm(buf, priv, hw);
 783                         return 1;
 784                 }
 785
 786                 hw->x = (((buf[3] & 0x10) << 8) |
 787                          ((buf[1] & 0x0f) << 8) |
 788                          buf[4]);
 789                 hw->y = (((buf[3] & 0x20) << 7) |
 790                          ((buf[1] & 0xf0) << 4) |
 791                          buf[5]);
 792                 hw->z = buf[2];
 793
 794                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 795                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 796
 797                 if (priv->is_forcepad) {
 798                         /*
 799                          * ForcePads, like Clickpads, use middle button
 800                          * bits to report primary button clicks.
 801                          * Unfortunately they report primary button not
 802                          * only when user presses on the pad above certain
 803                          * threshold, but also when there are more than one
 804                          * finger on the touchpad, which interferes with
 805                          * out multi-finger gestures.
 806                          */
 807                         if (hw->z == 0) {
 808                                 /* No contacts */
 809                                 priv->press = priv->report_press = false;
 810                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 811                                 /*
 812                                  * Single-finger touch with pressure above
 813                                  * the threshold. If pressure stays long
 814                                  * enough, we'll start reporting primary
 815                                  * button. We rely on the device continuing
 816                                  * sending data even if finger does not
 817                                  * move.
 818                                  */
 819                                 if  (!priv->press) {
 820                                         priv->press_start = jiffies;
 821                                         priv->press = true;
 822                                 } else if (time_after(jiffies,
 823                                                 priv->press_start +
 824                                                         msecs_to_jiffies(50))) {
 825                                         priv->report_press = true;
 826                                 }
 827                         } else {
 828                                 priv->press = false;
 829                         }
 830
 831                         hw->left = priv->report_press;
 832
 833                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 834                         /*
 835                          * Clickpad's button is transmitted as middle button,
 836                          * however, since it is primary button, we will report
 837                          * it as BTN_LEFT.
 838                          */
 839                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 840
 841                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 842                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 843                         if (hw->w == 2)
 844                                 hw->scroll = (s8)buf[1];
 845                 }
 846
 847                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 848                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 849                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 850                 }
 851
 852                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 853                     ((buf[0] ^ buf[3]) & 0x02)) {
 854                         synaptics_parse_ext_buttons(buf, priv, hw);
 855                 }
 856         } else {
 857                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 858                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 859
 860                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 861                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 862
 863                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 864                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 865         }
 866
 867         /*
 868          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 869          * is used by some firmware to indicate a finger at the edge of
 870          * the touchpad whose precise position cannot be determined, so
 871          * convert these values to the maximum axis value.
 872          */
 873         if (hw->x > X_MAX_POSITIVE)
 874                 hw->x -= 1 << ABS_POS_BITS;
 875         else if (hw->x == X_MAX_POSITIVE)
 876                 hw->x = XMAX;
 877
 878         if (hw->y > Y_MAX_POSITIVE)
 879                 hw->y -= 1 << ABS_POS_BITS;
 880         else if (hw->y == Y_MAX_POSITIVE)
 881                 hw->y = YMAX;
 882
 883         return 0;
 884 }
 885
 886 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 887                                           bool active, int x, int y)
 888 {
 889         input_mt_slot(dev, slot);
 890         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 891         if (active) {
 892                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 893                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 894         }
 895 }
 896
 897 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 898                                           const struct synaptics_hw_state *a,
 899                                           const struct synaptics_hw_state *b,
 900                                           int num_fingers)
 901 {
 902         if (num_fingers >= 2) {
 903                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 904                                               min(a->y, b->y));
 905                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 906                                               max(a->y, b->y));
 907         } else if (num_fingers == 1) {
 908                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 909                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 910         } else {
 911                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 912                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 913         }
 914 }
 915
 916 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 917                                          const struct synaptics_hw_state *hw)
 918 {
 919         struct input_dev *dev = psmouse->dev;
 920         struct synaptics_data *priv = psmouse->private;
 921         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 922         int i;
 923
 924         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 925                 return;
 926
 927         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 928         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 929              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 930             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 931                 return;
 932
 933         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 934                 for (i = 0; i < ext_bits; i++) {
 935                         input_report_key(dev, BTN_0 + 2 * i,
 936                                 hw->ext_buttons & BIT(i));
 937                         input_report_key(dev, BTN_1 + 2 * i,
 938                                 hw->ext_buttons & BIT(i + ext_bits));
 939                 }
 940                 return;
 941         }
 942
 943         /*
 944          * This generation of touchpads has the trackstick buttons
 945          * physically wired to the touchpad. Re-route them through
 946          * the pass-through interface.
 947          */
 948         if (priv->pt_port) {
 949                 u8 pt_buttons;
 950
 951                 /* The trackstick expects at most 3 buttons */
 952                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 953                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 954                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 955
 956                 serio_interrupt(priv->pt_port,
 957                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 958                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 959         }
 960 }
 961
 962 static void synaptics_report_buttons(struct psmouse *psmouse,
 963                                      const struct synaptics_hw_state *hw)
 964 {
 965         struct input_dev *dev = psmouse->dev;
 966         struct synaptics_data *priv = psmouse->private;
 967
 968         input_report_key(dev, BTN_LEFT, hw->left);
 969         input_report_key(dev, BTN_RIGHT, hw->right);
 970
 971         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 972                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 973
 974         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 975                 input_report_key(dev, BTN_FORWARD, hw->up);
 976                 input_report_key(dev, BTN_BACK, hw->down);
 977         }
 978
 979         synaptics_report_ext_buttons(psmouse, hw);
 980 }
 981
 982 static void synaptics_report_mt_data(struct psmouse *psmouse,
 983                                      const struct synaptics_hw_state *sgm,
 984                                      int num_fingers)
 985 {
 986         struct input_dev *dev = psmouse->dev;
 987         struct synaptics_data *priv = psmouse->private;
 988         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 989         struct input_mt_pos pos[2];
 990         int slot[2], nsemi, i;
 991
 992         nsemi = clamp_val(num_fingers, 0, 2);
 993
 994         for (i = 0; i < nsemi; i++) {
 995                 pos[i].x = hw[i]->x;
 996                 pos[i].y = synaptics_invert_y(hw[i]->y);
 997         }
 998
 999         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1000
1001         for (i = 0; i < nsemi; i++) {
1002                 input_mt_slot(dev, slot[i]);
1003                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1004                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1005                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1006                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1007         }
1008
1009         input_mt_drop_unused(dev);
1010
1011         /* Don't use active slot count to generate BTN_TOOL events. */
1012         input_mt_report_pointer_emulation(dev, false);
1013
1014         /* Send the number of fingers reported by touchpad itself. */
1015         input_mt_report_finger_count(dev, num_fingers);
1016
1017         synaptics_report_buttons(psmouse, sgm);
1018
1019         input_sync(dev);
1020 }
1021
1022 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1023                                            struct synaptics_hw_state *sgm)
1024 {
1025         struct synaptics_data *priv = psmouse->private;
1026         int num_fingers;
1027
1028         /*
1029          * Update mt_state using the new finger count and current mt_state.
1030          */
1031         if (sgm->z == 0)
1032                 num_fingers = 0;
1033         else if (sgm->w >= 4)
1034                 num_fingers = 1;
1035         else if (sgm->w == 0)
1036                 num_fingers = 2;
1037         else if (sgm->w == 1)
1038                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1039         else
1040                 num_fingers = 4;
1041
1042         /* Send resulting input events to user space */
1043         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1044 }
1045
1046 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1047 {
1048         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1049                 return true;
1050
1051         /* Advanced gesture mode also sends multi finger data */
1052         return synaptics_has_agm(priv);
1053 }
1054
1055 /*
1056  *  called for each full received packet from the touchpad
1057  */
1058 static void synaptics_process_packet(struct psmouse *psmouse)
1059 {
1060         struct input_dev *dev = psmouse->dev;
1061         struct synaptics_data *priv = psmouse->private;
1062         struct synaptics_device_info *info = &priv->info;
1063         struct synaptics_hw_state hw;
1064         int num_fingers;
1065         int finger_width;
1066
1067         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1068                 return;
1069
1070         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1071                 synaptics_image_sensor_process(psmouse, &hw);
1072                 return;
1073         }
1074
1075         if (hw.scroll) {
1076                 priv->scroll += hw.scroll;
1077
1078                 while (priv->scroll >= 4) {
1079                         input_report_key(dev, BTN_BACK, !hw.down);
1080                         input_sync(dev);
1081                         input_report_key(dev, BTN_BACK, hw.down);
1082                         input_sync(dev);
1083                         priv->scroll -= 4;
1084                 }
1085                 while (priv->scroll <= -4) {
1086                         input_report_key(dev, BTN_FORWARD, !hw.up);
1087                         input_sync(dev);
1088                         input_report_key(dev, BTN_FORWARD, hw.up);
1089                         input_sync(dev);
1090                         priv->scroll += 4;
1091                 }
1092                 return;
1093         }
1094
1095         if (hw.z > 0 && hw.x > 1) {
1096                 num_fingers = 1;
1097                 finger_width = 5;
1098                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1099                         switch (hw.w) {
1100                         case 0 ... 1:
1101                                 if (synaptics_has_multifinger(priv))
1102                                         num_fingers = hw.w + 2;
1103                                 break;
1104                         case 2:
1105                                 if (SYN_MODEL_PEN(info->model_id))
1106                                         ;   /* Nothing, treat a pen as a single finger */
1107                                 break;
1108                         case 4 ... 15:
1109                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1110                                         finger_width = hw.w;
1111                                 break;
1112                         }
1113                 }
1114         } else {
1115                 num_fingers = 0;
1116                 finger_width = 0;
1117         }
1118
1119         if (cr48_profile_sensor) {
1120                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1121                 return;
1122         }
1123
1124         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1125                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1126                                               num_fingers);
1127
1128         /* Post events
1129          * BTN_TOUCH has to be first as mousedev relies on it when doing
1130          * absolute -> relative conversion
1131          */
1132         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1133         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1134
1135         if (num_fingers > 0) {
1136                 input_report_abs(dev, ABS_X, hw.x);
1137                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1138         }
1139         input_report_abs(dev, ABS_PRESSURE, hw.z);
1140
1141         if (SYN_CAP_PALMDETECT(info->capabilities))
1142                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1143
1144         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1145         if (synaptics_has_multifinger(priv)) {
1146                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1147                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1148         }
1149
1150         synaptics_report_buttons(psmouse, &hw);
1151
1152         input_sync(dev);
1153 }
1154
1155 static bool synaptics_validate_byte(struct psmouse *psmouse,
1156                                     int idx, enum synaptics_pkt_type pkt_type)
1157 {
1158         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1159         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1160         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1161         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1162         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1163         const u8 *packet = psmouse->packet;
1164
1165         if (idx < 0 || idx > 4)
1166                 return false;
1167
1168         switch (pkt_type) {
1169
1170         case SYN_NEWABS:
1171         case SYN_NEWABS_RELAXED:
1172                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1173
1174         case SYN_NEWABS_STRICT:
1175                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1176
1177         case SYN_OLDABS:
1178                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1179
1180         default:
1181                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1182                 return false;
1183         }
1184 }
1185
1186 static enum synaptics_pkt_type
1187 synaptics_detect_pkt_type(struct psmouse *psmouse)
1188 {
1189         int i;
1190
1191         for (i = 0; i < 5; i++) {
1192                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1193                         psmouse_info(psmouse, "using relaxed packet validation\n");
1194                         return SYN_NEWABS_RELAXED;
1195                 }
1196         }
1197
1198         return SYN_NEWABS_STRICT;
1199 }
1200
1201 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1202 {
1203         struct synaptics_data *priv = psmouse->private;
1204
1205         if (psmouse->pktcnt >= 6) { /* Full packet received */
1206                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1207                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1208
1209                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1210                     synaptics_is_pt_packet(psmouse->packet)) {
1211                         if (priv->pt_port)
1212                                 synaptics_pass_pt_packet(priv->pt_port,
1213                                                          psmouse->packet);
1214                 } else
1215                         synaptics_process_packet(psmouse);
1216
1217                 return PSMOUSE_FULL_PACKET;
1218         }
1219
1220         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1221                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1222 }
1223
1224 /*****************************************************************************
1225  *      Driver initialization/cleanup functions
1226  ****************************************************************************/
1227 static void set_abs_position_params(struct input_dev *dev,
1228                                     struct synaptics_device_info *info,
1229                                     int x_code, int y_code)
1230 {
1231         int x_min = info->x_min ?: XMIN_NOMINAL;
1232         int x_max = info->x_max ?: XMAX_NOMINAL;
1233         int y_min = info->y_min ?: YMIN_NOMINAL;
1234         int y_max = info->y_max ?: YMAX_NOMINAL;
1235         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1236                         SYN_REDUCED_FILTER_FUZZ : 0;
1237
1238         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1239         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1240         input_abs_set_res(dev, x_code, info->x_res);
1241         input_abs_set_res(dev, y_code, info->y_res);
1242 }
1243
1244 static int set_input_params(struct psmouse *psmouse,
1245                             struct synaptics_data *priv)
1246 {
1247         struct input_dev *dev = psmouse->dev;
1248         struct synaptics_device_info *info = &priv->info;
1249         int i;
1250         int error;
1251
1252         /* Reset default psmouse capabilities */
1253         __clear_bit(EV_REL, dev->evbit);
1254         bitmap_zero(dev->relbit, REL_CNT);
1255         bitmap_zero(dev->keybit, KEY_CNT);
1256
1257         /* Things that apply to both modes */
1258         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1259
1260         input_set_capability(dev, EV_KEY, BTN_LEFT);
1261
1262         /* Clickpads report only left button */
1263         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1264                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1265                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1266                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1267         }
1268
1269         if (!priv->absolute_mode) {
1270                 /* Relative mode */
1271                 input_set_capability(dev, EV_REL, REL_X);
1272                 input_set_capability(dev, EV_REL, REL_Y);
1273                 return 0;
1274         }
1275
1276         /* Absolute mode */
1277         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1278         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1279
1280         if (cr48_profile_sensor)
1281                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1282
1283         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1284                 set_abs_position_params(dev, info,
1285                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1286                 /* Image sensors can report per-contact pressure */
1287                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1288
1289                 error = input_mt_init_slots(dev, 2,
1290                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1291                 if (error)
1292                         return error;
1293
1294                 /* Image sensors can signal 4 and 5 finger clicks */
1295                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1296                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1297         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1298                 set_abs_position_params(dev, info,
1299                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1300                 /*
1301                  * Profile sensor in CR-48 tracks contacts reasonably well,
1302                  * other non-image sensors with AGM use semi-mt.
1303                  */
1304                 error = input_mt_init_slots(dev, 2,
1305                                             INPUT_MT_POINTER |
1306                                              (cr48_profile_sensor ?
1307                                               INPUT_MT_TRACK :
1308                                               INPUT_MT_SEMI_MT));
1309                 if (error)
1310                         return error;
1311
1312                 /*
1313                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1314                  * input_mt_report_pointer_emulation. But
1315                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1316                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1317                  * position. Let's re-initialize ABS_X/Y here.
1318                  */
1319                 if (!cr48_profile_sensor)
1320                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1321         }
1322
1323         if (SYN_CAP_PALMDETECT(info->capabilities))
1324                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1325
1326         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1327         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1328
1329         if (synaptics_has_multifinger(priv)) {
1330                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1331                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1332         }
1333
1334         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1335             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1336                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1337                 input_set_capability(dev, EV_KEY, BTN_BACK);
1338         }
1339
1340         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1341                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1342                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1343
1344         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1345                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1346                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1347                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1348                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1349         }
1350
1351         return 0;
1352 }
1353
1354 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1355                                               void *data, char *buf)
1356 {
1357         struct synaptics_data *priv = psmouse->private;
1358
1359         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1360 }
1361
1362 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1363                                              void *data, const char *buf,
1364                                              size_t len)
1365 {
1366         struct synaptics_data *priv = psmouse->private;
1367         unsigned int value;
1368         int err;
1369
1370         err = kstrtouint(buf, 10, &value);
1371         if (err)
1372                 return err;
1373
1374         if (value > 1)
1375                 return -EINVAL;
1376
1377         if (value == priv->disable_gesture)
1378                 return len;
1379
1380         priv->disable_gesture = value;
1381         if (value)
1382                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1383         else
1384                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1385
1386         if (synaptics_mode_cmd(psmouse, priv->mode))
1387                 return -EIO;
1388
1389         return len;
1390 }
1391
1392 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1393                     synaptics_show_disable_gesture,
1394                     synaptics_set_disable_gesture);
1395
1396 static void synaptics_disconnect(struct psmouse *psmouse)
1397 {
1398         struct synaptics_data *priv = psmouse->private;
1399
1400         /*
1401          * We might have left a breadcrumb when trying to
1402          * set up SMbus companion.
1403          */
1404         psmouse_smbus_cleanup(psmouse);
1405
1406         if (!priv->absolute_mode &&
1407                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1408                 device_remove_file(&psmouse->ps2dev.serio->dev,
1409                                    &psmouse_attr_disable_gesture.dattr);
1410
1411         synaptics_reset(psmouse);
1412         kfree(priv);
1413         psmouse->private = NULL;
1414 }
1415
1416 static int synaptics_reconnect(struct psmouse *psmouse)
1417 {
1418         struct synaptics_data *priv = psmouse->private;
1419         struct synaptics_device_info info;
1420         u8 param[2];
1421         int retry = 0;
1422         int error;
1423
1424         do {
1425                 psmouse_reset(psmouse);
1426                 if (retry) {
1427                         /*
1428                          * On some boxes, right after resuming, the touchpad
1429                          * needs some time to finish initializing (I assume
1430                          * it needs time to calibrate) and start responding
1431                          * to Synaptics-specific queries, so let's wait a
1432                          * bit.
1433                          */
1434                         ssleep(1);
1435                 }
1436                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1437                 error = synaptics_detect(psmouse, 0);
1438         } while (error && ++retry < 3);
1439
1440         if (error)
1441                 return error;
1442
1443         if (retry > 1)
1444                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1445
1446         error = synaptics_query_hardware(psmouse, &info);
1447         if (error) {
1448                 psmouse_err(psmouse, "Unable to query device.\n");
1449                 return error;
1450         }
1451
1452         error = synaptics_set_mode(psmouse);
1453         if (error) {
1454                 psmouse_err(psmouse, "Unable to initialize device.\n");
1455                 return error;
1456         }
1457
1458         if (info.identity != priv->info.identity ||
1459             info.model_id != priv->info.model_id ||
1460             info.capabilities != priv->info.capabilities ||
1461             info.ext_cap != priv->info.ext_cap) {
1462                 psmouse_err(psmouse,
1463                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1464                             priv->info.identity, info.identity,
1465                             priv->info.model_id, info.model_id,
1466                             priv->info.capabilities, info.capabilities,
1467                             priv->info.ext_cap, info.ext_cap);
1468                 return -ENXIO;
1469         }
1470
1471         return 0;
1472 }
1473
1474 static bool impaired_toshiba_kbc;
1475
1476 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1477 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1478         {
1479                 /* Toshiba Satellite */
1480                 .matches = {
1481                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1482                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1483                 },
1484         },
1485         {
1486                 /* Toshiba Dynabook */
1487                 .matches = {
1488                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1489                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1490                 },
1491         },
1492         {
1493                 /* Toshiba Portege M300 */
1494                 .matches = {
1495                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1496                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1497                 },
1498
1499         },
1500         {
1501                 /* Toshiba Portege M300 */
1502                 .matches = {
1503                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1504                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1505                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1506                 },
1507
1508         },
1509 #endif
1510         { }
1511 };
1512
1513 static bool broken_olpc_ec;
1514
1515 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1516 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1517         {
1518                 /* OLPC XO-1 or XO-1.5 */
1519                 .matches = {
1520                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1521                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1522                 },
1523         },
1524 #endif
1525         { }
1526 };
1527
1528 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1529 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1530         {
1531                 /* Cr-48 Chromebook (Codename Mario) */
1532                 .matches = {
1533                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1534                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1535                 },
1536         },
1537 #endif
1538         { }
1539 };
1540
1541 void __init synaptics_module_init(void)
1542 {
1543         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1544         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1545         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1546 }
1547
1548 static int synaptics_init_ps2(struct psmouse *psmouse,
1549                               struct synaptics_device_info *info,
1550                               bool absolute_mode)
1551 {
1552         struct synaptics_data *priv;
1553         int err;
1554
1555         synaptics_apply_quirks(psmouse, info);
1556
1557         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1558         if (!priv)
1559                 return -ENOMEM;
1560
1561         priv->info = *info;
1562         priv->absolute_mode = absolute_mode;
1563         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1564                 priv->disable_gesture = true;
1565
1566         /*
1567          * Unfortunately ForcePad capability is not exported over PS/2,
1568          * so we have to resort to checking PNP IDs.
1569          */
1570         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1571
1572         err = synaptics_set_mode(psmouse);
1573         if (err) {
1574                 psmouse_err(psmouse, "Unable to initialize device.\n");
1575                 goto init_fail;
1576         }
1577
1578         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1579                                         SYN_NEWABS : SYN_OLDABS;
1580
1581         psmouse_info(psmouse,
1582                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1583                      SYN_ID_MODEL(info->identity),
1584                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1585                      info->model_id,
1586                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1587                      info->ext_cap_10, info->board_id, info->firmware_id);
1588
1589         err = set_input_params(psmouse, priv);
1590         if (err) {
1591                 psmouse_err(psmouse,
1592                             "failed to set up capabilities: %d\n", err);
1593                 goto init_fail;
1594         }
1595
1596         /*
1597          * Encode touchpad model so that it can be used to set
1598          * input device->id.version and be visible to userspace.
1599          * Because version is __u16 we have to drop something.
1600          * Hardware info bits seem to be good candidates as they
1601          * are documented to be for Synaptics corp. internal use.
1602          */
1603         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1604                           (info->model_id & 0x000000ff);
1605
1606         if (absolute_mode) {
1607                 psmouse->protocol_handler = synaptics_process_byte;
1608                 psmouse->pktsize = 6;
1609         } else {
1610                 /* Relative mode follows standard PS/2 mouse protocol */
1611                 psmouse->protocol_handler = psmouse_process_byte;
1612                 psmouse->pktsize = 3;
1613         }
1614
1615         psmouse->set_rate = synaptics_set_rate;
1616         psmouse->disconnect = synaptics_disconnect;
1617         psmouse->reconnect = synaptics_reconnect;
1618         psmouse->cleanup = synaptics_reset;
1619         /* Synaptics can usually stay in sync without extra help */
1620         psmouse->resync_time = 0;
1621
1622         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1623                 synaptics_pt_create(psmouse);
1624
1625         /*
1626          * Toshiba's KBC seems to have trouble handling data from
1627          * Synaptics at full rate.  Switch to a lower rate (roughly
1628          * the same rate as a standard PS/2 mouse).
1629          */
1630         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1631                 psmouse_info(psmouse,
1632                              "Toshiba %s detected, limiting rate to 40pps.\n",
1633                              dmi_get_system_info(DMI_PRODUCT_NAME));
1634                 psmouse->rate = 40;
1635         }
1636
1637         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1638                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1639                                          &psmouse_attr_disable_gesture.dattr);
1640                 if (err) {
1641                         psmouse_err(psmouse,
1642                                     "Failed to create disable_gesture attribute (%d)",
1643                                     err);
1644                         goto init_fail;
1645                 }
1646         }
1647
1648         return 0;
1649
1650  init_fail:
1651         kfree(priv);
1652         return err;
1653 }
1654
1655 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1656 {
1657         struct synaptics_device_info info;
1658         int error;
1659
1660         psmouse_reset(psmouse);
1661
1662         error = synaptics_query_hardware(psmouse, &info);
1663         if (error) {
1664                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1665                 return error;
1666         }
1667
1668         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1669 }
1670
1671 int synaptics_init_absolute(struct psmouse *psmouse)
1672 {
1673         return __synaptics_init(psmouse, true);
1674 }
1675
1676 int synaptics_init_relative(struct psmouse *psmouse)
1677 {
1678         return __synaptics_init(psmouse, false);
1679 }
1680
1681 static int synaptics_setup_ps2(struct psmouse *psmouse,
1682                                struct synaptics_device_info *info)
1683 {
1684         bool absolute_mode = true;
1685         int error;
1686
1687         /*
1688          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1689          * packet spew overloads the EC such that key presses on the keyboard
1690          * are missed.  Given that, don't even attempt to use Absolute mode.
1691          * Relative mode seems to work just fine.
1692          */
1693         if (broken_olpc_ec) {
1694                 psmouse_info(psmouse,
1695                              "OLPC XO detected, forcing relative protocol.\n");
1696                 absolute_mode = false;
1697         }
1698
1699         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1700         if (error)
1701                 return error;
1702
1703         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1704 }
1705
1706 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1707
1708 void __init synaptics_module_init(void)
1709 {
1710 }
1711
1712 static int __maybe_unused
1713 synaptics_setup_ps2(struct psmouse *psmouse,
1714                     struct synaptics_device_info *info)
1715 {
1716         return -ENOSYS;
1717 }
1718
1719 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1720
1721 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1722
1723 /*
1724  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1725  * provides a better bandwidth and allow a better control of the touchpads.
1726  * This is used to decide if we need to use this bus or not.
1727  */
1728 enum {
1729         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1730         SYNAPTICS_INTERTOUCH_OFF,
1731         SYNAPTICS_INTERTOUCH_ON,
1732 };
1733
1734 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1735                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1736 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1737 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1738
1739 static int synaptics_create_intertouch(struct psmouse *psmouse,
1740                                        struct synaptics_device_info *info,
1741                                        bool leave_breadcrumbs)
1742 {
1743         bool topbuttonpad =
1744                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1745                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1746         const struct rmi_device_platform_data pdata = {
1747                 .sensor_pdata = {
1748                         .sensor_type = rmi_sensor_touchpad,
1749                         .axis_align.flip_y = true,
1750                         .kernel_tracking = false,
1751                         .topbuttonpad = topbuttonpad,
1752                 },
1753                 .f30_data = {
1754                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1755                         .trackstick_buttons =
1756                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1757                 },
1758         };
1759         const struct i2c_board_info intertouch_board = {
1760                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1761                 .flags = I2C_CLIENT_HOST_NOTIFY,
1762         };
1763
1764         return psmouse_smbus_init(psmouse, &intertouch_board,
1765                                   &pdata, sizeof(pdata), true,
1766                                   leave_breadcrumbs);
1767 }
1768
1769 /**
1770  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1771  * and decides to instantiate a SMBus InterTouch device.
1772  */
1773 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1774                                       struct synaptics_device_info *info,
1775                                       bool leave_breadcrumbs)
1776 {
1777         int error;
1778
1779         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1780                 return -ENXIO;
1781
1782         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1783                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1784                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1785
1786                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1787                                 psmouse_info(psmouse,
1788                                              "Your touchpad (%s) says it can support a different bus. "
1789                                              "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",
1790                                              psmouse->ps2dev.serio->firmware_id);
1791
1792                         return -ENXIO;
1793                 }
1794         }
1795
1796         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1797
1798         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1799         if (error) {
1800                 if (error == -EAGAIN)
1801                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1802                 else
1803                         psmouse_err(psmouse, "unable to create intertouch device\n");
1804
1805                 return error;
1806         }
1807
1808         return 0;
1809 }
1810
1811 int synaptics_init_smbus(struct psmouse *psmouse)
1812 {
1813         struct synaptics_device_info info;
1814         int error;
1815
1816         psmouse_reset(psmouse);
1817
1818         error = synaptics_query_hardware(psmouse, &info);
1819         if (error) {
1820                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1821                 return error;
1822         }
1823
1824         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1825                 return -ENXIO;
1826
1827         return synaptics_create_intertouch(psmouse, &info, false);
1828 }
1829
1830 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1831
1832 static int __maybe_unused
1833 synaptics_setup_intertouch(struct psmouse *psmouse,
1834                            struct synaptics_device_info *info,
1835                            bool leave_breadcrumbs)
1836 {
1837         return -ENOSYS;
1838 }
1839
1840 int synaptics_init_smbus(struct psmouse *psmouse)
1841 {
1842         return -ENOSYS;
1843 }
1844
1845 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1846
1847 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1848     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1849
1850 int synaptics_init(struct psmouse *psmouse)
1851 {
1852         struct synaptics_device_info info;
1853         int error;
1854         int retval;
1855
1856         psmouse_reset(psmouse);
1857
1858         error = synaptics_query_hardware(psmouse, &info);
1859         if (error) {
1860                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1861                 return error;
1862         }
1863
1864         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1865                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1866                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1867                     /* Forcepads need F21, which is not ready */
1868                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1869                         psmouse_warn(psmouse,
1870                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1871                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1872                 }
1873
1874                 error = synaptics_setup_intertouch(psmouse, &info, true);
1875                 if (!error)
1876                         return PSMOUSE_SYNAPTICS_SMBUS;
1877         }
1878
1879         retval = synaptics_setup_ps2(psmouse, &info);
1880         if (retval < 0) {
1881                 /*
1882                  * Not using any flavor of Synaptics support, so clean up
1883                  * SMbus breadcrumbs, if any.
1884                  */
1885                 psmouse_smbus_cleanup(psmouse);
1886         }
1887
1888         return retval;
1889 }
1890
1891 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1892
1893 int synaptics_init(struct psmouse *psmouse)
1894 {
1895         return -ENOSYS;
1896 }
1897
1898 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */