drivers/input/mouse/synaptics.c

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