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