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