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 <[email protected]>
   6  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   7  *     for explaining various Synaptics quirks.
   8  *
   9  *   2003 Peter Osterlund <[email protected]>
  10  *     Ported to 2.5 input device infrastructure.
  11  *
  12  *   Copyright (C) 2001 Stefan Gmeiner <[email protected]>
  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 <[email protected]>
  17  *   Copyright (c) 1998-2000 Bruce Kalk <[email protected]>
  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         "LEN007a", /* T470s */
 174         "LEN0071", /* T480 */
 175         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 176         "LEN0073", /* X1 Carbon G5 (Elantech) */
 177         "LEN0091", /* X1 Carbon 6 */
 178         "LEN0092", /* X1 Carbon 6 */
 179         "LEN0093", /* T480 */
 180         "LEN0096", /* X280 */
 181         "LEN0097", /* X280 -> ALPS trackpoint */
 182         "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
 183         "LEN009b", /* T580 */
 184         "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
 185         "LEN040f", /* P1 Gen 3 */
 186         "LEN0411", /* L14 Gen 1 */
 187         "LEN200f", /* T450s */
 188         "LEN2044", /* L470  */
 189         "LEN2054", /* E480 */
 190         "LEN2055", /* E580 */
 191         "LEN2068", /* T14 Gen 1 */
 192         "SYN3015", /* HP EliteBook 840 G2 */
 193         "SYN3052", /* HP EliteBook 840 G4 */
 194         "SYN3221", /* HP 15-ay000 */
 195         "SYN323d", /* HP Spectre X360 13-w013dx */
 196         "SYN3257", /* HP Envy 13-ad105ng */
 197         NULL
 198 };
 199
 200 static const char * const forcepad_pnp_ids[] = {
 201         "SYN300D",
 202         "SYN3014",
 203         NULL
 204 };
 205
 206 /*
 207  * Send a command to the synaptics touchpad by special commands
 208  */
 209 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 210 {
 211         int error;
 212
 213         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 214         if (error)
 215                 return error;
 216
 217         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 218         if (error)
 219                 return error;
 220
 221         return 0;
 222 }
 223
 224 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 225 {
 226         int error;
 227         union {
 228                 __be32 be_val;
 229                 char buf[4];
 230         } resp = { 0 };
 231
 232         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 233         if (error)
 234                 return error;
 235
 236         *val = be32_to_cpu(resp.be_val);
 237         return 0;
 238 }
 239
 240 /*
 241  * Identify Touchpad
 242  * See also the SYN_ID_* macros
 243  */
 244 static int synaptics_identify(struct psmouse *psmouse,
 245                               struct synaptics_device_info *info)
 246 {
 247         int error;
 248
 249         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 250         if (error)
 251                 return error;
 252
 253         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 254 }
 255
 256 /*
 257  * Read the model-id bytes from the touchpad
 258  * see also SYN_MODEL_* macros
 259  */
 260 static int synaptics_model_id(struct psmouse *psmouse,
 261                               struct synaptics_device_info *info)
 262 {
 263         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 264 }
 265
 266 /*
 267  * Read the firmware id from the touchpad
 268  */
 269 static int synaptics_firmware_id(struct psmouse *psmouse,
 270                                  struct synaptics_device_info *info)
 271 {
 272         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 273                                    &info->firmware_id);
 274 }
 275
 276 /*
 277  * Read the board id and the "More Extended Queries" from the touchpad
 278  * The board id is encoded in the "QUERY MODES" response
 279  */
 280 static int synaptics_query_modes(struct psmouse *psmouse,
 281                                  struct synaptics_device_info *info)
 282 {
 283         u8 bid[3];
 284         int error;
 285
 286         /* firmwares prior 7.5 have no board_id encoded */
 287         if (SYN_ID_FULL(info->identity) < 0x705)
 288                 return 0;
 289
 290         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 291         if (error)
 292                 return error;
 293
 294         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 295
 296         if (SYN_MEXT_CAP_BIT(bid[0]))
 297                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 298                                            &info->ext_cap_10);
 299
 300         return 0;
 301 }
 302
 303 /*
 304  * Read the capability-bits from the touchpad
 305  * see also the SYN_CAP_* macros
 306  */
 307 static int synaptics_capability(struct psmouse *psmouse,
 308                                 struct synaptics_device_info *info)
 309 {
 310         int error;
 311
 312         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 313                                     &info->capabilities);
 314         if (error)
 315                 return error;
 316
 317         info->ext_cap = info->ext_cap_0c = 0;
 318
 319         /*
 320          * Older firmwares had submodel ID fixed to 0x47
 321          */
 322         if (SYN_ID_FULL(info->identity) < 0x705 &&
 323             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 324                 return -ENXIO;
 325         }
 326
 327         /*
 328          * Unless capExtended is set the rest of the flags should be ignored
 329          */
 330         if (!SYN_CAP_EXTENDED(info->capabilities))
 331                 info->capabilities = 0;
 332
 333         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 334                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 335                                             &info->ext_cap);
 336                 if (error) {
 337                         psmouse_warn(psmouse,
 338                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 339                 } else {
 340                         /*
 341                          * if nExtBtn is greater than 8 it should be considered
 342                          * invalid and treated as 0
 343                          */
 344                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 345                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 346                 }
 347         }
 348
 349         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 350                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 351                                             &info->ext_cap_0c);
 352                 if (error)
 353                         psmouse_warn(psmouse,
 354                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 355         }
 356
 357         return 0;
 358 }
 359
 360 /*
 361  * Read touchpad resolution and maximum reported coordinates
 362  * Resolution is left zero if touchpad does not support the query
 363  */
 364 static int synaptics_resolution(struct psmouse *psmouse,
 365                                 struct synaptics_device_info *info)
 366 {
 367         u8 resp[3];
 368         int error;
 369
 370         if (SYN_ID_MAJOR(info->identity) < 4)
 371                 return 0;
 372
 373         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 374         if (!error) {
 375                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 376                         info->x_res = resp[0]; /* x resolution in units/mm */
 377                         info->y_res = resp[2]; /* y resolution in units/mm */
 378                 }
 379         }
 380
 381         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 382             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 383                 error = synaptics_send_cmd(psmouse,
 384                                            SYN_QUE_EXT_MAX_COORDS, resp);
 385                 if (error) {
 386                         psmouse_warn(psmouse,
 387                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 388                 } else {
 389                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 390                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 391                         psmouse_info(psmouse,
 392                                      "queried max coordinates: x [..%d], y [..%d]\n",
 393                                      info->x_max, info->y_max);
 394                 }
 395         }
 396
 397         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 398             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 399              /*
 400               * Firmware v8.1 does not report proper number of extended
 401               * capabilities, but has been proven to report correct min
 402               * coordinates.
 403               */
 404              SYN_ID_FULL(info->identity) == 0x801)) {
 405                 error = synaptics_send_cmd(psmouse,
 406                                            SYN_QUE_EXT_MIN_COORDS, resp);
 407                 if (error) {
 408                         psmouse_warn(psmouse,
 409                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 410                 } else {
 411                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 412                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 413                         psmouse_info(psmouse,
 414                                      "queried min coordinates: x [%d..], y [%d..]\n",
 415                                      info->x_min, info->y_min);
 416                 }
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int synaptics_query_hardware(struct psmouse *psmouse,
 423                                     struct synaptics_device_info *info)
 424 {
 425         int error;
 426
 427         memset(info, 0, sizeof(*info));
 428
 429         error = synaptics_identify(psmouse, info);
 430         if (error)
 431                 return error;
 432
 433         error = synaptics_model_id(psmouse, info);
 434         if (error)
 435                 return error;
 436
 437         error = synaptics_firmware_id(psmouse, info);
 438         if (error)
 439                 return error;
 440
 441         error = synaptics_query_modes(psmouse, info);
 442         if (error)
 443                 return error;
 444
 445         error = synaptics_capability(psmouse, info);
 446         if (error)
 447                 return error;
 448
 449         error = synaptics_resolution(psmouse, info);
 450         if (error)
 451                 return error;
 452
 453         return 0;
 454 }
 455
 456 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 457
 458 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 459
 460 static bool cr48_profile_sensor;
 461
 462 #define ANY_BOARD_ID 0
 463 struct min_max_quirk {
 464         const char * const *pnp_ids;
 465         struct {
 466                 u32 min, max;
 467         } board_id;
 468         u32 x_min, x_max, y_min, y_max;
 469 };
 470
 471 static const struct min_max_quirk min_max_pnpid_table[] = {
 472         {
 473                 (const char * const []){"LEN0033", NULL},
 474                 {ANY_BOARD_ID, ANY_BOARD_ID},
 475                 1024, 5052, 2258, 4832
 476         },
 477         {
 478                 (const char * const []){"LEN0042", NULL},
 479                 {ANY_BOARD_ID, ANY_BOARD_ID},
 480                 1232, 5710, 1156, 4696
 481         },
 482         {
 483                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 484                                         "LEN0039", "LEN2002", "LEN2004",
 485                                         NULL},
 486                 {ANY_BOARD_ID, 2961},
 487                 1024, 5112, 2024, 4832
 488         },
 489         {
 490                 (const char * const []){"LEN2000", NULL},
 491                 {ANY_BOARD_ID, ANY_BOARD_ID},
 492                 1024, 5113, 2021, 4832
 493         },
 494         {
 495                 (const char * const []){"LEN2001", NULL},
 496                 {ANY_BOARD_ID, ANY_BOARD_ID},
 497                 1024, 5022, 2508, 4832
 498         },
 499         {
 500                 (const char * const []){"LEN2006", NULL},
 501                 {2691, 2691},
 502                 1024, 5045, 2457, 4832
 503         },
 504         {
 505                 (const char * const []){"LEN2006", NULL},
 506                 {ANY_BOARD_ID, ANY_BOARD_ID},
 507                 1264, 5675, 1171, 4688
 508         },
 509         { }
 510 };
 511
 512 /*****************************************************************************
 513  *      Synaptics communications functions
 514  ****************************************************************************/
 515
 516 /*
 517  * Synaptics touchpads report the y coordinate from bottom to top, which is
 518  * opposite from what userspace expects.
 519  * This function is used to invert y before reporting.
 520  */
 521 static int synaptics_invert_y(int y)
 522 {
 523         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 524 }
 525
 526 /*
 527  * Apply quirk(s) if the hardware matches
 528  */
 529 static void synaptics_apply_quirks(struct psmouse *psmouse,
 530                                    struct synaptics_device_info *info)
 531 {
 532         int i;
 533
 534         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 535                 if (!psmouse_matches_pnp_id(psmouse,
 536                                             min_max_pnpid_table[i].pnp_ids))
 537                         continue;
 538
 539                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 540                     info->board_id < min_max_pnpid_table[i].board_id.min)
 541                         continue;
 542
 543                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 544                     info->board_id > min_max_pnpid_table[i].board_id.max)
 545                         continue;
 546
 547                 info->x_min = min_max_pnpid_table[i].x_min;
 548                 info->x_max = min_max_pnpid_table[i].x_max;
 549                 info->y_min = min_max_pnpid_table[i].y_min;
 550                 info->y_max = min_max_pnpid_table[i].y_max;
 551                 psmouse_info(psmouse,
 552                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 553                              info->x_min, info->x_max,
 554                              info->y_min, info->y_max);
 555                 break;
 556         }
 557 }
 558
 559 static bool synaptics_has_agm(struct synaptics_data *priv)
 560 {
 561         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 562                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 563 }
 564
 565 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 566 {
 567         static u8 param = 0xc8;
 568         int error;
 569
 570         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 571         if (error)
 572                 return error;
 573
 574         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 575         if (error)
 576                 return error;
 577
 578         return 0;
 579 }
 580
 581 static int synaptics_set_mode(struct psmouse *psmouse)
 582 {
 583         struct synaptics_data *priv = psmouse->private;
 584         int error;
 585
 586         priv->mode = 0;
 587         if (priv->absolute_mode)
 588                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 589         if (priv->disable_gesture)
 590                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 591         if (psmouse->rate >= 80)
 592                 priv->mode |= SYN_BIT_HIGH_RATE;
 593         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 594                 priv->mode |= SYN_BIT_W_MODE;
 595
 596         error = synaptics_mode_cmd(psmouse, priv->mode);
 597         if (error)
 598                 return error;
 599
 600         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 601                 error = synaptics_set_advanced_gesture_mode(psmouse);
 602                 if (error) {
 603                         psmouse_err(psmouse,
 604                                     "Advanced gesture mode init failed: %d\n",
 605                                     error);
 606                         return error;
 607                 }
 608         }
 609
 610         return 0;
 611 }
 612
 613 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 614 {
 615         struct synaptics_data *priv = psmouse->private;
 616
 617         if (rate >= 80) {
 618                 priv->mode |= SYN_BIT_HIGH_RATE;
 619                 psmouse->rate = 80;
 620         } else {
 621                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 622                 psmouse->rate = 40;
 623         }
 624
 625         synaptics_mode_cmd(psmouse, priv->mode);
 626 }
 627
 628 /*****************************************************************************
 629  *      Synaptics pass-through PS/2 port support
 630  ****************************************************************************/
 631 static int synaptics_pt_write(struct serio *serio, u8 c)
 632 {
 633         struct psmouse *parent = psmouse_from_serio(serio->parent);
 634         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 635         int error;
 636
 637         error = ps2_sliced_command(&parent->ps2dev, c);
 638         if (error)
 639                 return error;
 640
 641         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 642         if (error)
 643                 return error;
 644
 645         return 0;
 646 }
 647
 648 static int synaptics_pt_start(struct serio *serio)
 649 {
 650         struct psmouse *parent = psmouse_from_serio(serio->parent);
 651         struct synaptics_data *priv = parent->private;
 652
 653         guard(serio_pause_rx)(parent->ps2dev.serio);
 654         priv->pt_port = serio;
 655
 656         return 0;
 657 }
 658
 659 static void synaptics_pt_stop(struct serio *serio)
 660 {
 661         struct psmouse *parent = psmouse_from_serio(serio->parent);
 662         struct synaptics_data *priv = parent->private;
 663
 664         guard(serio_pause_rx)(parent->ps2dev.serio);
 665         priv->pt_port = NULL;
 666 }
 667
 668 static int synaptics_pt_open(struct serio *serio)
 669 {
 670         struct psmouse *parent = psmouse_from_serio(serio->parent);
 671         struct synaptics_data *priv = parent->private;
 672
 673         guard(serio_pause_rx)(parent->ps2dev.serio);
 674         priv->pt_port_open = true;
 675
 676         return 0;
 677 }
 678
 679 static void synaptics_pt_close(struct serio *serio)
 680 {
 681         struct psmouse *parent = psmouse_from_serio(serio->parent);
 682         struct synaptics_data *priv = parent->private;
 683
 684         guard(serio_pause_rx)(parent->ps2dev.serio);
 685         priv->pt_port_open = false;
 686 }
 687
 688 static int synaptics_is_pt_packet(u8 *buf)
 689 {
 690         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 691 }
 692
 693 static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet)
 694 {
 695         struct serio *ptport;
 696
 697         ptport = priv->pt_port;
 698         if (!ptport)
 699                 return;
 700
 701         serio_interrupt(ptport, packet[1], 0);
 702
 703         if (priv->pt_port_open) {
 704                 struct psmouse *child = psmouse_from_serio(ptport);
 705
 706                 if (child->state == PSMOUSE_ACTIVATED) {
 707                         serio_interrupt(ptport, packet[4], 0);
 708                         serio_interrupt(ptport, packet[5], 0);
 709                         if (child->pktsize == 4)
 710                                 serio_interrupt(ptport, packet[2], 0);
 711                 }
 712         }
 713 }
 714
 715 static void synaptics_pt_activate(struct psmouse *psmouse)
 716 {
 717         struct synaptics_data *priv = psmouse->private;
 718         struct psmouse *child = psmouse_from_serio(priv->pt_port);
 719
 720         /* adjust the touchpad to child's choice of protocol */
 721         if (child) {
 722                 if (child->pktsize == 4)
 723                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 724                 else
 725                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 726
 727                 if (synaptics_mode_cmd(psmouse, priv->mode))
 728                         psmouse_warn(psmouse,
 729                                      "failed to switch guest protocol\n");
 730         }
 731 }
 732
 733 static void synaptics_pt_create(struct psmouse *psmouse)
 734 {
 735         struct serio *serio;
 736
 737         serio = kzalloc(sizeof(*serio), GFP_KERNEL);
 738         if (!serio) {
 739                 psmouse_err(psmouse,
 740                             "not enough memory for pass-through port\n");
 741                 return;
 742         }
 743
 744         serio->id.type = SERIO_PS_PSTHRU;
 745         strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 746         strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
 747         serio->write = synaptics_pt_write;
 748         serio->start = synaptics_pt_start;
 749         serio->stop = synaptics_pt_stop;
 750         serio->open = synaptics_pt_open;
 751         serio->close = synaptics_pt_close;
 752         serio->parent = psmouse->ps2dev.serio;
 753
 754         psmouse->pt_activate = synaptics_pt_activate;
 755
 756         psmouse_info(psmouse, "serio: %s port at %s\n",
 757                      serio->name, psmouse->phys);
 758         serio_register_port(serio);
 759 }
 760
 761 /*****************************************************************************
 762  *      Functions to interpret the absolute mode packets
 763  ****************************************************************************/
 764
 765 static void synaptics_parse_agm(const u8 buf[],
 766                                 struct synaptics_data *priv,
 767                                 struct synaptics_hw_state *hw)
 768 {
 769         struct synaptics_hw_state *agm = &priv->agm;
 770         int agm_packet_type;
 771
 772         agm_packet_type = (buf[5] & 0x30) >> 4;
 773         switch (agm_packet_type) {
 774         case 1:
 775                 /* Gesture packet: (x, y, z) half resolution */
 776                 agm->w = hw->w;
 777                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 778                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 779                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 780                 break;
 781
 782         case 2:
 783                 /* AGM-CONTACT packet: we are only interested in the count */
 784                 priv->agm_count = buf[1];
 785                 break;
 786
 787         default:
 788                 break;
 789         }
 790 }
 791
 792 static void synaptics_parse_ext_buttons(const u8 buf[],
 793                                         struct synaptics_data *priv,
 794                                         struct synaptics_hw_state *hw)
 795 {
 796         unsigned int ext_bits =
 797                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 798         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 799
 800         hw->ext_buttons = buf[4] & ext_mask;
 801         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 802 }
 803
 804 static int synaptics_parse_hw_state(const u8 buf[],
 805                                     struct synaptics_data *priv,
 806                                     struct synaptics_hw_state *hw)
 807 {
 808         memset(hw, 0, sizeof(struct synaptics_hw_state));
 809
 810         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 811                 hw->w = (((buf[0] & 0x30) >> 2) |
 812                          ((buf[0] & 0x04) >> 1) |
 813                          ((buf[3] & 0x04) >> 2));
 814
 815                 if (synaptics_has_agm(priv) && hw->w == 2) {
 816                         synaptics_parse_agm(buf, priv, hw);
 817                         return 1;
 818                 }
 819
 820                 hw->x = (((buf[3] & 0x10) << 8) |
 821                          ((buf[1] & 0x0f) << 8) |
 822                          buf[4]);
 823                 hw->y = (((buf[3] & 0x20) << 7) |
 824                          ((buf[1] & 0xf0) << 4) |
 825                          buf[5]);
 826                 hw->z = buf[2];
 827
 828                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 829                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 830
 831                 if (priv->is_forcepad) {
 832                         /*
 833                          * ForcePads, like Clickpads, use middle button
 834                          * bits to report primary button clicks.
 835                          * Unfortunately they report primary button not
 836                          * only when user presses on the pad above certain
 837                          * threshold, but also when there are more than one
 838                          * finger on the touchpad, which interferes with
 839                          * out multi-finger gestures.
 840                          */
 841                         if (hw->z == 0) {
 842                                 /* No contacts */
 843                                 priv->press = priv->report_press = false;
 844                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 845                                 /*
 846                                  * Single-finger touch with pressure above
 847                                  * the threshold. If pressure stays long
 848                                  * enough, we'll start reporting primary
 849                                  * button. We rely on the device continuing
 850                                  * sending data even if finger does not
 851                                  * move.
 852                                  */
 853                                 if  (!priv->press) {
 854                                         priv->press_start = jiffies;
 855                                         priv->press = true;
 856                                 } else if (time_after(jiffies,
 857                                                 priv->press_start +
 858                                                         msecs_to_jiffies(50))) {
 859                                         priv->report_press = true;
 860                                 }
 861                         } else {
 862                                 priv->press = false;
 863                         }
 864
 865                         hw->left = priv->report_press;
 866
 867                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 868                         /*
 869                          * Clickpad's button is transmitted as middle button,
 870                          * however, since it is primary button, we will report
 871                          * it as BTN_LEFT.
 872                          */
 873                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 874
 875                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 876                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 877                         if (hw->w == 2)
 878                                 hw->scroll = (s8)buf[1];
 879                 }
 880
 881                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 882                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 883                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 884                 }
 885
 886                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 887                     ((buf[0] ^ buf[3]) & 0x02)) {
 888                         synaptics_parse_ext_buttons(buf, priv, hw);
 889                 }
 890         } else {
 891                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 892                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 893
 894                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 895                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 896
 897                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 898                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 899         }
 900
 901         /*
 902          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 903          * is used by some firmware to indicate a finger at the edge of
 904          * the touchpad whose precise position cannot be determined, so
 905          * convert these values to the maximum axis value.
 906          */
 907         if (hw->x > X_MAX_POSITIVE)
 908                 hw->x -= 1 << ABS_POS_BITS;
 909         else if (hw->x == X_MAX_POSITIVE)
 910                 hw->x = XMAX;
 911
 912         if (hw->y > Y_MAX_POSITIVE)
 913                 hw->y -= 1 << ABS_POS_BITS;
 914         else if (hw->y == Y_MAX_POSITIVE)
 915                 hw->y = YMAX;
 916
 917         return 0;
 918 }
 919
 920 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 921                                           bool active, int x, int y)
 922 {
 923         input_mt_slot(dev, slot);
 924         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 925         if (active) {
 926                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 927                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 928         }
 929 }
 930
 931 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 932                                           const struct synaptics_hw_state *a,
 933                                           const struct synaptics_hw_state *b,
 934                                           int num_fingers)
 935 {
 936         if (num_fingers >= 2) {
 937                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 938                                               min(a->y, b->y));
 939                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 940                                               max(a->y, b->y));
 941         } else if (num_fingers == 1) {
 942                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 943                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 944         } else {
 945                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 946                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 947         }
 948 }
 949
 950 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 951                                          const struct synaptics_hw_state *hw)
 952 {
 953         struct input_dev *dev = psmouse->dev;
 954         struct synaptics_data *priv = psmouse->private;
 955         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 956         int i;
 957
 958         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 959                 return;
 960
 961         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 962         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 963              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 964             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 965                 return;
 966
 967         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 968                 for (i = 0; i < ext_bits; i++) {
 969                         input_report_key(dev, BTN_0 + 2 * i,
 970                                 hw->ext_buttons & BIT(i));
 971                         input_report_key(dev, BTN_1 + 2 * i,
 972                                 hw->ext_buttons & BIT(i + ext_bits));
 973                 }
 974                 return;
 975         }
 976
 977         /*
 978          * This generation of touchpads has the trackstick buttons
 979          * physically wired to the touchpad. Re-route them through
 980          * the pass-through interface.
 981          */
 982         if (priv->pt_port) {
 983                 u8 pt_buttons;
 984
 985                 /* The trackstick expects at most 3 buttons */
 986                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 987                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 988                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 989
 990                 serio_interrupt(priv->pt_port,
 991                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 992                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 993         }
 994 }
 995
 996 static void synaptics_report_buttons(struct psmouse *psmouse,
 997                                      const struct synaptics_hw_state *hw)
 998 {
 999         struct input_dev *dev = psmouse->dev;
1000         struct synaptics_data *priv = psmouse->private;
1001
1002         input_report_key(dev, BTN_LEFT, hw->left);
1003         input_report_key(dev, BTN_RIGHT, hw->right);
1004
1005         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
1006                 input_report_key(dev, BTN_MIDDLE, hw->middle);
1007
1008         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
1009                 input_report_key(dev, BTN_FORWARD, hw->up);
1010                 input_report_key(dev, BTN_BACK, hw->down);
1011         }
1012
1013         synaptics_report_ext_buttons(psmouse, hw);
1014 }
1015
1016 static void synaptics_report_mt_data(struct psmouse *psmouse,
1017                                      const struct synaptics_hw_state *sgm,
1018                                      int num_fingers)
1019 {
1020         struct input_dev *dev = psmouse->dev;
1021         struct synaptics_data *priv = psmouse->private;
1022         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1023         struct input_mt_pos pos[2];
1024         int slot[2], nsemi, i;
1025
1026         nsemi = clamp_val(num_fingers, 0, 2);
1027
1028         for (i = 0; i < nsemi; i++) {
1029                 pos[i].x = hw[i]->x;
1030                 pos[i].y = synaptics_invert_y(hw[i]->y);
1031         }
1032
1033         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1034
1035         for (i = 0; i < nsemi; i++) {
1036                 input_mt_slot(dev, slot[i]);
1037                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1038                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1039                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1040                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1041         }
1042
1043         input_mt_drop_unused(dev);
1044
1045         /* Don't use active slot count to generate BTN_TOOL events. */
1046         input_mt_report_pointer_emulation(dev, false);
1047
1048         /* Send the number of fingers reported by touchpad itself. */
1049         input_mt_report_finger_count(dev, num_fingers);
1050
1051         synaptics_report_buttons(psmouse, sgm);
1052
1053         input_sync(dev);
1054 }
1055
1056 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1057                                            struct synaptics_hw_state *sgm)
1058 {
1059         struct synaptics_data *priv = psmouse->private;
1060         int num_fingers;
1061
1062         /*
1063          * Update mt_state using the new finger count and current mt_state.
1064          */
1065         if (sgm->z == 0)
1066                 num_fingers = 0;
1067         else if (sgm->w >= 4)
1068                 num_fingers = 1;
1069         else if (sgm->w == 0)
1070                 num_fingers = 2;
1071         else if (sgm->w == 1)
1072                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1073         else
1074                 num_fingers = 4;
1075
1076         /* Send resulting input events to user space */
1077         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1078 }
1079
1080 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1081 {
1082         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1083                 return true;
1084
1085         /* Advanced gesture mode also sends multi finger data */
1086         return synaptics_has_agm(priv);
1087 }
1088
1089 /*
1090  *  called for each full received packet from the touchpad
1091  */
1092 static void synaptics_process_packet(struct psmouse *psmouse)
1093 {
1094         struct input_dev *dev = psmouse->dev;
1095         struct synaptics_data *priv = psmouse->private;
1096         struct synaptics_device_info *info = &priv->info;
1097         struct synaptics_hw_state hw;
1098         int num_fingers;
1099         int finger_width;
1100
1101         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1102                 return;
1103
1104         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1105                 synaptics_image_sensor_process(psmouse, &hw);
1106                 return;
1107         }
1108
1109         if (hw.scroll) {
1110                 priv->scroll += hw.scroll;
1111
1112                 while (priv->scroll >= 4) {
1113                         input_report_key(dev, BTN_BACK, !hw.down);
1114                         input_sync(dev);
1115                         input_report_key(dev, BTN_BACK, hw.down);
1116                         input_sync(dev);
1117                         priv->scroll -= 4;
1118                 }
1119                 while (priv->scroll <= -4) {
1120                         input_report_key(dev, BTN_FORWARD, !hw.up);
1121                         input_sync(dev);
1122                         input_report_key(dev, BTN_FORWARD, hw.up);
1123                         input_sync(dev);
1124                         priv->scroll += 4;
1125                 }
1126                 return;
1127         }
1128
1129         if (hw.z > 0 && hw.x > 1) {
1130                 num_fingers = 1;
1131                 finger_width = 5;
1132                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1133                         switch (hw.w) {
1134                         case 0 ... 1:
1135                                 if (synaptics_has_multifinger(priv))
1136                                         num_fingers = hw.w + 2;
1137                                 break;
1138                         case 2:
1139                                 /*
1140                                  * SYN_MODEL_PEN(info->model_id): even if
1141                                  * the device supports pen, we treat it as
1142                                  * a single finger.
1143                                  */
1144                                 break;
1145                         case 4 ... 15:
1146                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1147                                         finger_width = hw.w;
1148                                 break;
1149                         }
1150                 }
1151         } else {
1152                 num_fingers = 0;
1153                 finger_width = 0;
1154         }
1155
1156         if (cr48_profile_sensor) {
1157                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1158                 return;
1159         }
1160
1161         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1162                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1163                                               num_fingers);
1164
1165         /* Post events
1166          * BTN_TOUCH has to be first as mousedev relies on it when doing
1167          * absolute -> relative conversion
1168          */
1169         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1170         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1171
1172         if (num_fingers > 0) {
1173                 input_report_abs(dev, ABS_X, hw.x);
1174                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1175         }
1176         input_report_abs(dev, ABS_PRESSURE, hw.z);
1177
1178         if (SYN_CAP_PALMDETECT(info->capabilities))
1179                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1180
1181         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1182         if (synaptics_has_multifinger(priv)) {
1183                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1184                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1185         }
1186
1187         synaptics_report_buttons(psmouse, &hw);
1188
1189         input_sync(dev);
1190 }
1191
1192 static bool synaptics_validate_byte(struct psmouse *psmouse,
1193                                     int idx, enum synaptics_pkt_type pkt_type)
1194 {
1195         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1196         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1197         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1198         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1199         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1200         const u8 *packet = psmouse->packet;
1201
1202         if (idx < 0 || idx > 4)
1203                 return false;
1204
1205         switch (pkt_type) {
1206
1207         case SYN_NEWABS:
1208         case SYN_NEWABS_RELAXED:
1209                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1210
1211         case SYN_NEWABS_STRICT:
1212                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1213
1214         case SYN_OLDABS:
1215                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1216
1217         default:
1218                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1219                 return false;
1220         }
1221 }
1222
1223 static enum synaptics_pkt_type
1224 synaptics_detect_pkt_type(struct psmouse *psmouse)
1225 {
1226         int i;
1227
1228         for (i = 0; i < 5; i++) {
1229                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1230                         psmouse_info(psmouse, "using relaxed packet validation\n");
1231                         return SYN_NEWABS_RELAXED;
1232                 }
1233         }
1234
1235         return SYN_NEWABS_STRICT;
1236 }
1237
1238 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1239 {
1240         struct synaptics_data *priv = psmouse->private;
1241
1242         if (psmouse->pktcnt >= 6) { /* Full packet received */
1243                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1244                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1245
1246                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1247                     synaptics_is_pt_packet(psmouse->packet)) {
1248                         synaptics_pass_pt_packet(priv, psmouse->packet);
1249                 } else {
1250                         synaptics_process_packet(psmouse);
1251                 }
1252
1253                 return PSMOUSE_FULL_PACKET;
1254         }
1255
1256         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1257                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1258 }
1259
1260 /*****************************************************************************
1261  *      Driver initialization/cleanup functions
1262  ****************************************************************************/
1263 static void set_abs_position_params(struct input_dev *dev,
1264                                     struct synaptics_device_info *info,
1265                                     int x_code, int y_code)
1266 {
1267         int x_min = info->x_min ?: XMIN_NOMINAL;
1268         int x_max = info->x_max ?: XMAX_NOMINAL;
1269         int y_min = info->y_min ?: YMIN_NOMINAL;
1270         int y_max = info->y_max ?: YMAX_NOMINAL;
1271         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1272                         SYN_REDUCED_FILTER_FUZZ : 0;
1273
1274         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1275         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1276         input_abs_set_res(dev, x_code, info->x_res);
1277         input_abs_set_res(dev, y_code, info->y_res);
1278 }
1279
1280 static int set_input_params(struct psmouse *psmouse,
1281                             struct synaptics_data *priv)
1282 {
1283         struct input_dev *dev = psmouse->dev;
1284         struct synaptics_device_info *info = &priv->info;
1285         int i;
1286         int error;
1287
1288         /* Reset default psmouse capabilities */
1289         __clear_bit(EV_REL, dev->evbit);
1290         bitmap_zero(dev->relbit, REL_CNT);
1291         bitmap_zero(dev->keybit, KEY_CNT);
1292
1293         /* Things that apply to both modes */
1294         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1295
1296         input_set_capability(dev, EV_KEY, BTN_LEFT);
1297
1298         /* Clickpads report only left button */
1299         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1300                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1301                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1302                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1303         }
1304
1305         if (!priv->absolute_mode) {
1306                 /* Relative mode */
1307                 input_set_capability(dev, EV_REL, REL_X);
1308                 input_set_capability(dev, EV_REL, REL_Y);
1309                 return 0;
1310         }
1311
1312         /* Absolute mode */
1313         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1314         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1315
1316         if (cr48_profile_sensor)
1317                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1318
1319         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1320                 set_abs_position_params(dev, info,
1321                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1322                 /* Image sensors can report per-contact pressure */
1323                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1324
1325                 error = input_mt_init_slots(dev, 2,
1326                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1327                 if (error)
1328                         return error;
1329
1330                 /* Image sensors can signal 4 and 5 finger clicks */
1331                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1332                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1333         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1334                 set_abs_position_params(dev, info,
1335                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1336                 /*
1337                  * Profile sensor in CR-48 tracks contacts reasonably well,
1338                  * other non-image sensors with AGM use semi-mt.
1339                  */
1340                 error = input_mt_init_slots(dev, 2,
1341                                             INPUT_MT_POINTER |
1342                                              (cr48_profile_sensor ?
1343                                               INPUT_MT_TRACK :
1344                                               INPUT_MT_SEMI_MT));
1345                 if (error)
1346                         return error;
1347
1348                 /*
1349                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1350                  * input_mt_report_pointer_emulation. But
1351                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1352                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1353                  * position. Let's re-initialize ABS_X/Y here.
1354                  */
1355                 if (!cr48_profile_sensor)
1356                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1357         }
1358
1359         if (SYN_CAP_PALMDETECT(info->capabilities))
1360                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1361
1362         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1363         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1364
1365         if (synaptics_has_multifinger(priv)) {
1366                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1367                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1368         }
1369
1370         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1371             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1372                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1373                 input_set_capability(dev, EV_KEY, BTN_BACK);
1374         }
1375
1376         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1377                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1378                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1379
1380         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1381                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1382                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1383                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1384                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1385         }
1386
1387         return 0;
1388 }
1389
1390 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1391                                               void *data, char *buf)
1392 {
1393         struct synaptics_data *priv = psmouse->private;
1394
1395         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1396 }
1397
1398 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1399                                              void *data, const char *buf,
1400                                              size_t len)
1401 {
1402         struct synaptics_data *priv = psmouse->private;
1403         unsigned int value;
1404         int err;
1405
1406         err = kstrtouint(buf, 10, &value);
1407         if (err)
1408                 return err;
1409
1410         if (value > 1)
1411                 return -EINVAL;
1412
1413         if (value == priv->disable_gesture)
1414                 return len;
1415
1416         priv->disable_gesture = value;
1417         if (value)
1418                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1419         else
1420                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1421
1422         if (synaptics_mode_cmd(psmouse, priv->mode))
1423                 return -EIO;
1424
1425         return len;
1426 }
1427
1428 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1429                     synaptics_show_disable_gesture,
1430                     synaptics_set_disable_gesture);
1431
1432 static void synaptics_disconnect(struct psmouse *psmouse)
1433 {
1434         struct synaptics_data *priv = psmouse->private;
1435
1436         /*
1437          * We might have left a breadcrumb when trying to
1438          * set up SMbus companion.
1439          */
1440         psmouse_smbus_cleanup(psmouse);
1441
1442         if (!priv->absolute_mode &&
1443                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1444                 device_remove_file(&psmouse->ps2dev.serio->dev,
1445                                    &psmouse_attr_disable_gesture.dattr);
1446
1447         synaptics_reset(psmouse);
1448         kfree(priv);
1449         psmouse->private = NULL;
1450 }
1451
1452 static int synaptics_reconnect(struct psmouse *psmouse)
1453 {
1454         struct synaptics_data *priv = psmouse->private;
1455         struct synaptics_device_info info;
1456         u8 param[2];
1457         int retry = 0;
1458         int error;
1459
1460         do {
1461                 psmouse_reset(psmouse);
1462                 if (retry) {
1463                         /*
1464                          * On some boxes, right after resuming, the touchpad
1465                          * needs some time to finish initializing (I assume
1466                          * it needs time to calibrate) and start responding
1467                          * to Synaptics-specific queries, so let's wait a
1468                          * bit.
1469                          */
1470                         ssleep(1);
1471                 }
1472                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1473                 error = synaptics_detect(psmouse, 0);
1474         } while (error && ++retry < 3);
1475
1476         if (error)
1477                 return error;
1478
1479         if (retry > 1)
1480                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1481
1482         error = synaptics_query_hardware(psmouse, &info);
1483         if (error) {
1484                 psmouse_err(psmouse, "Unable to query device.\n");
1485                 return error;
1486         }
1487
1488         error = synaptics_set_mode(psmouse);
1489         if (error) {
1490                 psmouse_err(psmouse, "Unable to initialize device.\n");
1491                 return error;
1492         }
1493
1494         if (info.identity != priv->info.identity ||
1495             info.model_id != priv->info.model_id ||
1496             info.capabilities != priv->info.capabilities ||
1497             info.ext_cap != priv->info.ext_cap) {
1498                 psmouse_err(psmouse,
1499                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1500                             priv->info.identity, info.identity,
1501                             priv->info.model_id, info.model_id,
1502                             priv->info.capabilities, info.capabilities,
1503                             priv->info.ext_cap, info.ext_cap);
1504                 return -ENXIO;
1505         }
1506
1507         return 0;
1508 }
1509
1510 static bool impaired_toshiba_kbc;
1511
1512 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1513 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1514         {
1515                 /* Toshiba Satellite */
1516                 .matches = {
1517                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1518                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1519                 },
1520         },
1521         {
1522                 /* Toshiba Dynabook */
1523                 .matches = {
1524                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1525                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1526                 },
1527         },
1528         {
1529                 /* Toshiba Portege M300 */
1530                 .matches = {
1531                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1532                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1533                 },
1534
1535         },
1536         {
1537                 /* Toshiba Portege M300 */
1538                 .matches = {
1539                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1540                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1541                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1542                 },
1543
1544         },
1545 #endif
1546         { }
1547 };
1548
1549 static bool broken_olpc_ec;
1550
1551 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1552 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1553         {
1554                 /* OLPC XO-1 or XO-1.5 */
1555                 .matches = {
1556                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1557                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1558                 },
1559         },
1560 #endif
1561         { }
1562 };
1563
1564 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1565 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1566         {
1567                 /* Cr-48 Chromebook (Codename Mario) */
1568                 .matches = {
1569                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1570                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1571                 },
1572         },
1573 #endif
1574         { }
1575 };
1576
1577 void __init synaptics_module_init(void)
1578 {
1579         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1580         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1581         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1582 }
1583
1584 static int synaptics_init_ps2(struct psmouse *psmouse,
1585                               struct synaptics_device_info *info,
1586                               bool absolute_mode)
1587 {
1588         struct synaptics_data *priv;
1589         int err;
1590
1591         synaptics_apply_quirks(psmouse, info);
1592
1593         psmouse->private = priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1594         if (!priv)
1595                 return -ENOMEM;
1596
1597         priv->info = *info;
1598         priv->absolute_mode = absolute_mode;
1599         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1600                 priv->disable_gesture = true;
1601
1602         /*
1603          * Unfortunately ForcePad capability is not exported over PS/2,
1604          * so we have to resort to checking PNP IDs.
1605          */
1606         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1607
1608         err = synaptics_set_mode(psmouse);
1609         if (err) {
1610                 psmouse_err(psmouse, "Unable to initialize device.\n");
1611                 goto init_fail;
1612         }
1613
1614         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1615                                         SYN_NEWABS : SYN_OLDABS;
1616
1617         psmouse_info(psmouse,
1618                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1619                      SYN_ID_MODEL(info->identity),
1620                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1621                      info->model_id,
1622                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1623                      info->ext_cap_10, info->board_id, info->firmware_id);
1624
1625         err = set_input_params(psmouse, priv);
1626         if (err) {
1627                 psmouse_err(psmouse,
1628                             "failed to set up capabilities: %d\n", err);
1629                 goto init_fail;
1630         }
1631
1632         /*
1633          * Encode touchpad model so that it can be used to set
1634          * input device->id.version and be visible to userspace.
1635          * Because version is __u16 we have to drop something.
1636          * Hardware info bits seem to be good candidates as they
1637          * are documented to be for Synaptics corp. internal use.
1638          */
1639         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1640                           (info->model_id & 0x000000ff);
1641
1642         if (absolute_mode) {
1643                 psmouse->protocol_handler = synaptics_process_byte;
1644                 psmouse->pktsize = 6;
1645         } else {
1646                 /* Relative mode follows standard PS/2 mouse protocol */
1647                 psmouse->protocol_handler = psmouse_process_byte;
1648                 psmouse->pktsize = 3;
1649         }
1650
1651         psmouse->set_rate = synaptics_set_rate;
1652         psmouse->disconnect = synaptics_disconnect;
1653         psmouse->reconnect = synaptics_reconnect;
1654         psmouse->fast_reconnect = NULL;
1655         psmouse->cleanup = synaptics_reset;
1656         /* Synaptics can usually stay in sync without extra help */
1657         psmouse->resync_time = 0;
1658
1659         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1660                 synaptics_pt_create(psmouse);
1661
1662         /*
1663          * Toshiba's KBC seems to have trouble handling data from
1664          * Synaptics at full rate.  Switch to a lower rate (roughly
1665          * the same rate as a standard PS/2 mouse).
1666          */
1667         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1668                 psmouse_info(psmouse,
1669                              "Toshiba %s detected, limiting rate to 40pps.\n",
1670                              dmi_get_system_info(DMI_PRODUCT_NAME));
1671                 psmouse->rate = 40;
1672         }
1673
1674         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1675                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1676                                          &psmouse_attr_disable_gesture.dattr);
1677                 if (err) {
1678                         psmouse_err(psmouse,
1679                                     "Failed to create disable_gesture attribute (%d)",
1680                                     err);
1681                         goto init_fail;
1682                 }
1683         }
1684
1685         return 0;
1686
1687  init_fail:
1688         kfree(priv);
1689         return err;
1690 }
1691
1692 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1693 {
1694         struct synaptics_device_info info;
1695         int error;
1696
1697         psmouse_reset(psmouse);
1698
1699         error = synaptics_query_hardware(psmouse, &info);
1700         if (error) {
1701                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1702                 return error;
1703         }
1704
1705         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1706 }
1707
1708 int synaptics_init_absolute(struct psmouse *psmouse)
1709 {
1710         return __synaptics_init(psmouse, true);
1711 }
1712
1713 int synaptics_init_relative(struct psmouse *psmouse)
1714 {
1715         return __synaptics_init(psmouse, false);
1716 }
1717
1718 static int synaptics_setup_ps2(struct psmouse *psmouse,
1719                                struct synaptics_device_info *info)
1720 {
1721         bool absolute_mode = true;
1722         int error;
1723
1724         /*
1725          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1726          * packet spew overloads the EC such that key presses on the keyboard
1727          * are missed.  Given that, don't even attempt to use Absolute mode.
1728          * Relative mode seems to work just fine.
1729          */
1730         if (broken_olpc_ec) {
1731                 psmouse_info(psmouse,
1732                              "OLPC XO detected, forcing relative protocol.\n");
1733                 absolute_mode = false;
1734         }
1735
1736         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1737         if (error)
1738                 return error;
1739
1740         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1741 }
1742
1743 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1744
1745 void __init synaptics_module_init(void)
1746 {
1747 }
1748
1749 static int __maybe_unused
1750 synaptics_setup_ps2(struct psmouse *psmouse,
1751                     struct synaptics_device_info *info)
1752 {
1753         return -ENOSYS;
1754 }
1755
1756 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1757
1758 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1759
1760 /*
1761  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1762  * provides a better bandwidth and allow a better control of the touchpads.
1763  * This is used to decide if we need to use this bus or not.
1764  */
1765 enum {
1766         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1767         SYNAPTICS_INTERTOUCH_OFF,
1768         SYNAPTICS_INTERTOUCH_ON,
1769 };
1770
1771 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1772                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1773 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1774 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1775
1776 static int synaptics_create_intertouch(struct psmouse *psmouse,
1777                                        struct synaptics_device_info *info,
1778                                        bool leave_breadcrumbs)
1779 {
1780         bool topbuttonpad =
1781                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1782                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1783         const struct rmi_device_platform_data pdata = {
1784                 .reset_delay_ms = 30,
1785                 .sensor_pdata = {
1786                         .sensor_type = rmi_sensor_touchpad,
1787                         .axis_align.flip_y = true,
1788                         .kernel_tracking = false,
1789                         .topbuttonpad = topbuttonpad,
1790                 },
1791                 .gpio_data = {
1792                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1793                         .trackstick_buttons =
1794                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1795                 },
1796         };
1797         const struct i2c_board_info intertouch_board = {
1798                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1799                 .flags = I2C_CLIENT_HOST_NOTIFY,
1800         };
1801
1802         return psmouse_smbus_init(psmouse, &intertouch_board,
1803                                   &pdata, sizeof(pdata), true,
1804                                   leave_breadcrumbs);
1805 }
1806
1807 /*
1808  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1809  * and decides to instantiate a SMBus InterTouch device.
1810  */
1811 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1812                                       struct synaptics_device_info *info,
1813                                       bool leave_breadcrumbs)
1814 {
1815         int error;
1816
1817         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1818                 return -ENXIO;
1819
1820         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1821                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1822                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1823
1824                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1825                                 psmouse_info(psmouse,
1826                                              "Your touchpad (%s) says it can support a different bus. "
1827                                              "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to [email protected].\n",
1828                                              psmouse->ps2dev.serio->firmware_id);
1829
1830                         return -ENXIO;
1831                 }
1832         }
1833
1834         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1835
1836         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1837         if (error) {
1838                 if (error == -EAGAIN)
1839                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1840                 else
1841                         psmouse_err(psmouse, "unable to create intertouch device\n");
1842
1843                 return error;
1844         }
1845
1846         return 0;
1847 }
1848
1849 int synaptics_init_smbus(struct psmouse *psmouse)
1850 {
1851         struct synaptics_device_info info;
1852         int error;
1853
1854         psmouse_reset(psmouse);
1855
1856         error = synaptics_query_hardware(psmouse, &info);
1857         if (error) {
1858                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1859                 return error;
1860         }
1861
1862         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1863                 return -ENXIO;
1864
1865         return synaptics_create_intertouch(psmouse, &info, false);
1866 }
1867
1868 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1869
1870 static int __maybe_unused
1871 synaptics_setup_intertouch(struct psmouse *psmouse,
1872                            struct synaptics_device_info *info,
1873                            bool leave_breadcrumbs)
1874 {
1875         return -ENOSYS;
1876 }
1877
1878 int synaptics_init_smbus(struct psmouse *psmouse)
1879 {
1880         return -ENOSYS;
1881 }
1882
1883 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1884
1885 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1886     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1887
1888 int synaptics_init(struct psmouse *psmouse)
1889 {
1890         struct synaptics_device_info info;
1891         int error;
1892         int retval;
1893
1894         psmouse_reset(psmouse);
1895
1896         error = synaptics_query_hardware(psmouse, &info);
1897         if (error) {
1898                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1899                 return error;
1900         }
1901
1902         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1903                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1904                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1905                     /* Forcepads need F21, which is not ready */
1906                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1907                         psmouse_warn(psmouse,
1908                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1909                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1910                 }
1911
1912                 error = synaptics_setup_intertouch(psmouse, &info, true);
1913                 if (!error)
1914                         return PSMOUSE_SYNAPTICS_SMBUS;
1915         }
1916
1917         retval = synaptics_setup_ps2(psmouse, &info);
1918         if (retval < 0) {
1919                 /*
1920                  * Not using any flavor of Synaptics support, so clean up
1921                  * SMbus breadcrumbs, if any.
1922                  */
1923                 psmouse_smbus_cleanup(psmouse);
1924         }
1925
1926         return retval;
1927 }
1928
1929 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1930
1931 int synaptics_init(struct psmouse *psmouse)
1932 {
1933         return -ENOSYS;
1934 }
1935
1936 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */