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