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 = psmouse_sliced_command(psmouse, 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 = psmouse_sliced_command(psmouse, 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 = psmouse_sliced_command(psmouse, 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 = psmouse_sliced_command(parent, 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 void 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
1237         /* Things that apply to both modes */
1238         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1239         __set_bit(EV_KEY, dev->evbit);
1240         __set_bit(BTN_LEFT, dev->keybit);
1241         __set_bit(BTN_RIGHT, dev->keybit);
1242
1243         if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1244                 __set_bit(BTN_MIDDLE, dev->keybit);
1245
1246         if (!priv->absolute_mode) {
1247                 /* Relative mode */
1248                 __set_bit(EV_REL, dev->evbit);
1249                 __set_bit(REL_X, dev->relbit);
1250                 __set_bit(REL_Y, dev->relbit);
1251                 return;
1252         }
1253
1254         /* Absolute mode */
1255         __set_bit(EV_ABS, dev->evbit);
1256         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1257         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1258
1259         if (cr48_profile_sensor)
1260                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1261
1262         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1263                 set_abs_position_params(dev, info,
1264                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1265                 /* Image sensors can report per-contact pressure */
1266                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1267                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1268
1269                 /* Image sensors can signal 4 and 5 finger clicks */
1270                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1271                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1272         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1273                 set_abs_position_params(dev, info,
1274                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1275                 /*
1276                  * Profile sensor in CR-48 tracks contacts reasonably well,
1277                  * other non-image sensors with AGM use semi-mt.
1278                  */
1279                 input_mt_init_slots(dev, 2,
1280                                     INPUT_MT_POINTER |
1281                                     (cr48_profile_sensor ?
1282                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1283         }
1284
1285         if (SYN_CAP_PALMDETECT(info->capabilities))
1286                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1287
1288         __set_bit(BTN_TOUCH, dev->keybit);
1289         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1290
1291         if (synaptics_has_multifinger(priv)) {
1292                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1293                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1294         }
1295
1296         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1297             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1298                 __set_bit(BTN_FORWARD, dev->keybit);
1299                 __set_bit(BTN_BACK, dev->keybit);
1300         }
1301
1302         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1303                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1304                         __set_bit(BTN_0 + i, dev->keybit);
1305
1306         __clear_bit(EV_REL, dev->evbit);
1307         __clear_bit(REL_X, dev->relbit);
1308         __clear_bit(REL_Y, dev->relbit);
1309
1310         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1311                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1312                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1313                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1314                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1315                 /* Clickpads report only left button */
1316                 __clear_bit(BTN_RIGHT, dev->keybit);
1317                 __clear_bit(BTN_MIDDLE, dev->keybit);
1318         }
1319 }
1320
1321 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1322                                               void *data, char *buf)
1323 {
1324         struct synaptics_data *priv = psmouse->private;
1325
1326         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1327 }
1328
1329 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1330                                              void *data, const char *buf,
1331                                              size_t len)
1332 {
1333         struct synaptics_data *priv = psmouse->private;
1334         unsigned int value;
1335         int err;
1336
1337         err = kstrtouint(buf, 10, &value);
1338         if (err)
1339                 return err;
1340
1341         if (value > 1)
1342                 return -EINVAL;
1343
1344         if (value == priv->disable_gesture)
1345                 return len;
1346
1347         priv->disable_gesture = value;
1348         if (value)
1349                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1350         else
1351                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1352
1353         if (synaptics_mode_cmd(psmouse, priv->mode))
1354                 return -EIO;
1355
1356         return len;
1357 }
1358
1359 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1360                     synaptics_show_disable_gesture,
1361                     synaptics_set_disable_gesture);
1362
1363 static void synaptics_disconnect(struct psmouse *psmouse)
1364 {
1365         struct synaptics_data *priv = psmouse->private;
1366
1367         /*
1368          * We might have left a breadcrumb when trying to
1369          * set up SMbus companion.
1370          */
1371         psmouse_smbus_cleanup(psmouse);
1372
1373         if (!priv->absolute_mode &&
1374                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1375                 device_remove_file(&psmouse->ps2dev.serio->dev,
1376                                    &psmouse_attr_disable_gesture.dattr);
1377
1378         synaptics_reset(psmouse);
1379         kfree(priv);
1380         psmouse->private = NULL;
1381 }
1382
1383 static int synaptics_reconnect(struct psmouse *psmouse)
1384 {
1385         struct synaptics_data *priv = psmouse->private;
1386         struct synaptics_device_info info;
1387         u8 param[2];
1388         int retry = 0;
1389         int error;
1390
1391         do {
1392                 psmouse_reset(psmouse);
1393                 if (retry) {
1394                         /*
1395                          * On some boxes, right after resuming, the touchpad
1396                          * needs some time to finish initializing (I assume
1397                          * it needs time to calibrate) and start responding
1398                          * to Synaptics-specific queries, so let's wait a
1399                          * bit.
1400                          */
1401                         ssleep(1);
1402                 }
1403                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1404                 error = synaptics_detect(psmouse, 0);
1405         } while (error && ++retry < 3);
1406
1407         if (error)
1408                 return error;
1409
1410         if (retry > 1)
1411                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1412
1413         error = synaptics_query_hardware(psmouse, &info);
1414         if (error) {
1415                 psmouse_err(psmouse, "Unable to query device.\n");
1416                 return error;
1417         }
1418
1419         error = synaptics_set_mode(psmouse);
1420         if (error) {
1421                 psmouse_err(psmouse, "Unable to initialize device.\n");
1422                 return error;
1423         }
1424
1425         if (info.identity != priv->info.identity ||
1426             info.model_id != priv->info.model_id ||
1427             info.capabilities != priv->info.capabilities ||
1428             info.ext_cap != priv->info.ext_cap) {
1429                 psmouse_err(psmouse,
1430                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1431                             priv->info.identity, info.identity,
1432                             priv->info.model_id, info.model_id,
1433                             priv->info.capabilities, info.capabilities,
1434                             priv->info.ext_cap, info.ext_cap);
1435                 return -ENXIO;
1436         }
1437
1438         return 0;
1439 }
1440
1441 static bool impaired_toshiba_kbc;
1442
1443 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1444 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1445         {
1446                 /* Toshiba Satellite */
1447                 .matches = {
1448                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1449                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1450                 },
1451         },
1452         {
1453                 /* Toshiba Dynabook */
1454                 .matches = {
1455                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1456                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1457                 },
1458         },
1459         {
1460                 /* Toshiba Portege M300 */
1461                 .matches = {
1462                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1463                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1464                 },
1465
1466         },
1467         {
1468                 /* Toshiba Portege M300 */
1469                 .matches = {
1470                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1471                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1472                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1473                 },
1474
1475         },
1476 #endif
1477         { }
1478 };
1479
1480 static bool broken_olpc_ec;
1481
1482 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1483 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1484         {
1485                 /* OLPC XO-1 or XO-1.5 */
1486                 .matches = {
1487                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1488                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1489                 },
1490         },
1491 #endif
1492         { }
1493 };
1494
1495 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1496 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1497         {
1498                 /* Cr-48 Chromebook (Codename Mario) */
1499                 .matches = {
1500                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1501                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1502                 },
1503         },
1504 #endif
1505         { }
1506 };
1507
1508 void __init synaptics_module_init(void)
1509 {
1510         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1511         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1512         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1513 }
1514
1515 static int synaptics_init_ps2(struct psmouse *psmouse,
1516                               struct synaptics_device_info *info,
1517                               bool absolute_mode)
1518 {
1519         struct synaptics_data *priv;
1520         int err;
1521
1522         synaptics_apply_quirks(psmouse, info);
1523
1524         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1525         if (!priv)
1526                 return -ENOMEM;
1527
1528         priv->info = *info;
1529         priv->absolute_mode = absolute_mode;
1530         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1531                 priv->disable_gesture = true;
1532
1533         /*
1534          * Unfortunately ForcePad capability is not exported over PS/2,
1535          * so we have to resort to checking PNP IDs.
1536          */
1537         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1538
1539         err = synaptics_set_mode(psmouse);
1540         if (err) {
1541                 psmouse_err(psmouse, "Unable to initialize device.\n");
1542                 goto init_fail;
1543         }
1544
1545         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1546                                         SYN_NEWABS : SYN_OLDABS;
1547
1548         psmouse_info(psmouse,
1549                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1550                      SYN_ID_MODEL(info->identity),
1551                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1552                      info->model_id,
1553                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1554                      info->ext_cap_10, info->board_id, info->firmware_id);
1555
1556         set_input_params(psmouse, priv);
1557
1558         /*
1559          * Encode touchpad model so that it can be used to set
1560          * input device->id.version and be visible to userspace.
1561          * Because version is __u16 we have to drop something.
1562          * Hardware info bits seem to be good candidates as they
1563          * are documented to be for Synaptics corp. internal use.
1564          */
1565         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1566                           (info->model_id & 0x000000ff);
1567
1568         if (absolute_mode) {
1569                 psmouse->protocol_handler = synaptics_process_byte;
1570                 psmouse->pktsize = 6;
1571         } else {
1572                 /* Relative mode follows standard PS/2 mouse protocol */
1573                 psmouse->protocol_handler = psmouse_process_byte;
1574                 psmouse->pktsize = 3;
1575         }
1576
1577         psmouse->set_rate = synaptics_set_rate;
1578         psmouse->disconnect = synaptics_disconnect;
1579         psmouse->reconnect = synaptics_reconnect;
1580         psmouse->cleanup = synaptics_reset;
1581         /* Synaptics can usually stay in sync without extra help */
1582         psmouse->resync_time = 0;
1583
1584         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1585                 synaptics_pt_create(psmouse);
1586
1587         /*
1588          * Toshiba's KBC seems to have trouble handling data from
1589          * Synaptics at full rate.  Switch to a lower rate (roughly
1590          * the same rate as a standard PS/2 mouse).
1591          */
1592         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1593                 psmouse_info(psmouse,
1594                              "Toshiba %s detected, limiting rate to 40pps.\n",
1595                              dmi_get_system_info(DMI_PRODUCT_NAME));
1596                 psmouse->rate = 40;
1597         }
1598
1599         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1600                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1601                                          &psmouse_attr_disable_gesture.dattr);
1602                 if (err) {
1603                         psmouse_err(psmouse,
1604                                     "Failed to create disable_gesture attribute (%d)",
1605                                     err);
1606                         goto init_fail;
1607                 }
1608         }
1609
1610         return 0;
1611
1612  init_fail:
1613         kfree(priv);
1614         return err;
1615 }
1616
1617 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1618 {
1619         struct synaptics_device_info info;
1620         int error;
1621
1622         psmouse_reset(psmouse);
1623
1624         error = synaptics_query_hardware(psmouse, &info);
1625         if (error) {
1626                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1627                 return error;
1628         }
1629
1630         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1631 }
1632
1633 int synaptics_init_absolute(struct psmouse *psmouse)
1634 {
1635         return __synaptics_init(psmouse, true);
1636 }
1637
1638 int synaptics_init_relative(struct psmouse *psmouse)
1639 {
1640         return __synaptics_init(psmouse, false);
1641 }
1642
1643 static int synaptics_setup_ps2(struct psmouse *psmouse,
1644                                struct synaptics_device_info *info)
1645 {
1646         bool absolute_mode = true;
1647         int error;
1648
1649         /*
1650          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1651          * packet spew overloads the EC such that key presses on the keyboard
1652          * are missed.  Given that, don't even attempt to use Absolute mode.
1653          * Relative mode seems to work just fine.
1654          */
1655         if (broken_olpc_ec) {
1656                 psmouse_info(psmouse,
1657                              "OLPC XO detected, forcing relative protocol.\n");
1658                 absolute_mode = false;
1659         }
1660
1661         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1662         if (error)
1663                 return error;
1664
1665         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1666 }
1667
1668 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1669
1670 void __init synaptics_module_init(void)
1671 {
1672 }
1673
1674 static int __maybe_unused
1675 synaptics_setup_ps2(struct psmouse *psmouse,
1676                     struct synaptics_device_info *info)
1677 {
1678         return -ENOSYS;
1679 }
1680
1681 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1682
1683 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1684
1685 /*
1686  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1687  * provides a better bandwidth and allow a better control of the touchpads.
1688  * This is used to decide if we need to use this bus or not.
1689  */
1690 enum {
1691         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1692         SYNAPTICS_INTERTOUCH_OFF,
1693         SYNAPTICS_INTERTOUCH_ON,
1694 };
1695
1696 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1697                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1698 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1699 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1700
1701 static int synaptics_create_intertouch(struct psmouse *psmouse,
1702                                        struct synaptics_device_info *info,
1703                                        bool leave_breadcrumbs)
1704 {
1705         bool topbuttonpad =
1706                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1707                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1708         const struct rmi_device_platform_data pdata = {
1709                 .sensor_pdata = {
1710                         .sensor_type = rmi_sensor_touchpad,
1711                         .axis_align.flip_y = true,
1712                         /* to prevent cursors jumps: */
1713                         .kernel_tracking = true,
1714                         .topbuttonpad = topbuttonpad,
1715                 },
1716                 .f30_data = {
1717                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1718                         .trackstick_buttons =
1719                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1720                 },
1721         };
1722         const struct i2c_board_info intertouch_board = {
1723                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1724                 .flags = I2C_CLIENT_HOST_NOTIFY,
1725         };
1726
1727         return psmouse_smbus_init(psmouse, &intertouch_board,
1728                                   &pdata, sizeof(pdata),
1729                                   leave_breadcrumbs);
1730 }
1731
1732 /**
1733  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1734  * and decides to instantiate a SMBus InterTouch device.
1735  */
1736 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1737                                       struct synaptics_device_info *info,
1738                                       bool leave_breadcrumbs)
1739 {
1740         int error;
1741
1742         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1743                 return -ENXIO;
1744
1745         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1746                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1747                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1748
1749                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1750                                 psmouse_info(psmouse,
1751                                              "Your touchpad (%s) says it can support a different bus. "
1752                                              "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",
1753                                              psmouse->ps2dev.serio->firmware_id);
1754
1755                         return -ENXIO;
1756                 }
1757         }
1758
1759         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1760
1761         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1762         if (error) {
1763                 if (error == -EAGAIN)
1764                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1765                 else
1766                         psmouse_err(psmouse, "unable to create intertouch device\n");
1767
1768                 return error;
1769         }
1770
1771         return 0;
1772 }
1773
1774 int synaptics_init_smbus(struct psmouse *psmouse)
1775 {
1776         struct synaptics_device_info info;
1777         int error;
1778
1779         psmouse_reset(psmouse);
1780
1781         error = synaptics_query_hardware(psmouse, &info);
1782         if (error) {
1783                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1784                 return error;
1785         }
1786
1787         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1788                 return -ENXIO;
1789
1790         return synaptics_create_intertouch(psmouse, &info, false);
1791 }
1792
1793 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1794
1795 static int __maybe_unused
1796 synaptics_setup_intertouch(struct psmouse *psmouse,
1797                            struct synaptics_device_info *info,
1798                            bool leave_breadcrumbs)
1799 {
1800         return -ENOSYS;
1801 }
1802
1803 int synaptics_init_smbus(struct psmouse *psmouse)
1804 {
1805         return -ENOSYS;
1806 }
1807
1808 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1809
1810 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1811     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1812
1813 int synaptics_init(struct psmouse *psmouse)
1814 {
1815         struct synaptics_device_info info;
1816         int error;
1817         int retval;
1818
1819         psmouse_reset(psmouse);
1820
1821         error = synaptics_query_hardware(psmouse, &info);
1822         if (error) {
1823                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1824                 return error;
1825         }
1826
1827         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1828                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1829                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1830                     /* Forcepads need F21, which is not ready */
1831                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1832                         psmouse_warn(psmouse,
1833                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1834                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1835                 }
1836
1837                 error = synaptics_setup_intertouch(psmouse, &info, true);
1838                 if (!error)
1839                         return PSMOUSE_SYNAPTICS_SMBUS;
1840         }
1841
1842         retval = synaptics_setup_ps2(psmouse, &info);
1843         if (retval < 0) {
1844                 /*
1845                  * Not using any flavor of Synaptics support, so clean up
1846                  * SMbus breadcrumbs, if any.
1847                  */
1848                 psmouse_smbus_cleanup(psmouse);
1849         }
1850
1851         return retval;
1852 }
1853
1854 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1855
1856 int synaptics_init(struct psmouse *psmouse)
1857 {
1858         return -ENOSYS;
1859 }
1860
1861 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */