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 int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 539 {
 540         static u8 param = 0xc8;
 541         struct synaptics_data *priv = psmouse->private;
 542         int error;
 543
 544         if (!(SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 545               SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)))
 546                 return 0;
 547
 548         error = psmouse_sliced_command(psmouse, SYN_QUE_MODEL);
 549         if (error)
 550                 return error;
 551
 552         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 553         if (error)
 554                 return error;
 555
 556         /* Advanced gesture mode also sends multi finger data */
 557         priv->info.capabilities |= BIT(1);
 558
 559         return 0;
 560 }
 561
 562 static int synaptics_set_mode(struct psmouse *psmouse)
 563 {
 564         struct synaptics_data *priv = psmouse->private;
 565         int error;
 566
 567         priv->mode = 0;
 568         if (priv->absolute_mode)
 569                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 570         if (priv->disable_gesture)
 571                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 572         if (psmouse->rate >= 80)
 573                 priv->mode |= SYN_BIT_HIGH_RATE;
 574         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 575                 priv->mode |= SYN_BIT_W_MODE;
 576
 577         error = synaptics_mode_cmd(psmouse, priv->mode);
 578         if (error)
 579                 return error;
 580
 581         if (priv->absolute_mode) {
 582                 error = synaptics_set_advanced_gesture_mode(psmouse);
 583                 if (error) {
 584                         psmouse_err(psmouse,
 585                                     "Advanced gesture mode init failed: %d\n",
 586                                     error);
 587                         return error;
 588                 }
 589         }
 590
 591         return 0;
 592 }
 593
 594 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 595 {
 596         struct synaptics_data *priv = psmouse->private;
 597
 598         if (rate >= 80) {
 599                 priv->mode |= SYN_BIT_HIGH_RATE;
 600                 psmouse->rate = 80;
 601         } else {
 602                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 603                 psmouse->rate = 40;
 604         }
 605
 606         synaptics_mode_cmd(psmouse, priv->mode);
 607 }
 608
 609 /*****************************************************************************
 610  *      Synaptics pass-through PS/2 port support
 611  ****************************************************************************/
 612 static int synaptics_pt_write(struct serio *serio, u8 c)
 613 {
 614         struct psmouse *parent = serio_get_drvdata(serio->parent);
 615         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 616         int error;
 617
 618         error = psmouse_sliced_command(parent, c);
 619         if (error)
 620                 return error;
 621
 622         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 623         if (error)
 624                 return error;
 625
 626         return 0;
 627 }
 628
 629 static int synaptics_pt_start(struct serio *serio)
 630 {
 631         struct psmouse *parent = serio_get_drvdata(serio->parent);
 632         struct synaptics_data *priv = parent->private;
 633
 634         serio_pause_rx(parent->ps2dev.serio);
 635         priv->pt_port = serio;
 636         serio_continue_rx(parent->ps2dev.serio);
 637
 638         return 0;
 639 }
 640
 641 static void synaptics_pt_stop(struct serio *serio)
 642 {
 643         struct psmouse *parent = serio_get_drvdata(serio->parent);
 644         struct synaptics_data *priv = parent->private;
 645
 646         serio_pause_rx(parent->ps2dev.serio);
 647         priv->pt_port = NULL;
 648         serio_continue_rx(parent->ps2dev.serio);
 649 }
 650
 651 static int synaptics_is_pt_packet(u8 *buf)
 652 {
 653         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 654 }
 655
 656 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 657 {
 658         struct psmouse *child = serio_get_drvdata(ptport);
 659
 660         if (child && child->state == PSMOUSE_ACTIVATED) {
 661                 serio_interrupt(ptport, packet[1], 0);
 662                 serio_interrupt(ptport, packet[4], 0);
 663                 serio_interrupt(ptport, packet[5], 0);
 664                 if (child->pktsize == 4)
 665                         serio_interrupt(ptport, packet[2], 0);
 666         } else {
 667                 serio_interrupt(ptport, packet[1], 0);
 668         }
 669 }
 670
 671 static void synaptics_pt_activate(struct psmouse *psmouse)
 672 {
 673         struct synaptics_data *priv = psmouse->private;
 674         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 675
 676         /* adjust the touchpad to child's choice of protocol */
 677         if (child) {
 678                 if (child->pktsize == 4)
 679                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 680                 else
 681                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 682
 683                 if (synaptics_mode_cmd(psmouse, priv->mode))
 684                         psmouse_warn(psmouse,
 685                                      "failed to switch guest protocol\n");
 686         }
 687 }
 688
 689 static void synaptics_pt_create(struct psmouse *psmouse)
 690 {
 691         struct serio *serio;
 692
 693         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 694         if (!serio) {
 695                 psmouse_err(psmouse,
 696                             "not enough memory for pass-through port\n");
 697                 return;
 698         }
 699
 700         serio->id.type = SERIO_PS_PSTHRU;
 701         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 702         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 703         serio->write = synaptics_pt_write;
 704         serio->start = synaptics_pt_start;
 705         serio->stop = synaptics_pt_stop;
 706         serio->parent = psmouse->ps2dev.serio;
 707
 708         psmouse->pt_activate = synaptics_pt_activate;
 709
 710         psmouse_info(psmouse, "serio: %s port at %s\n",
 711                      serio->name, psmouse->phys);
 712         serio_register_port(serio);
 713 }
 714
 715 /*****************************************************************************
 716  *      Functions to interpret the absolute mode packets
 717  ****************************************************************************/
 718
 719 static void synaptics_parse_agm(const u8 buf[],
 720                                 struct synaptics_data *priv,
 721                                 struct synaptics_hw_state *hw)
 722 {
 723         struct synaptics_hw_state *agm = &priv->agm;
 724         int agm_packet_type;
 725
 726         agm_packet_type = (buf[5] & 0x30) >> 4;
 727         switch (agm_packet_type) {
 728         case 1:
 729                 /* Gesture packet: (x, y, z) half resolution */
 730                 agm->w = hw->w;
 731                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 732                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 733                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 734                 break;
 735
 736         case 2:
 737                 /* AGM-CONTACT packet: we are only interested in the count */
 738                 priv->agm_count = buf[1];
 739                 break;
 740
 741         default:
 742                 break;
 743         }
 744 }
 745
 746 static void synaptics_parse_ext_buttons(const u8 buf[],
 747                                         struct synaptics_data *priv,
 748                                         struct synaptics_hw_state *hw)
 749 {
 750         unsigned int ext_bits =
 751                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 752         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 753
 754         hw->ext_buttons = buf[4] & ext_mask;
 755         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 756 }
 757
 758 static int synaptics_parse_hw_state(const u8 buf[],
 759                                     struct synaptics_data *priv,
 760                                     struct synaptics_hw_state *hw)
 761 {
 762         memset(hw, 0, sizeof(struct synaptics_hw_state));
 763
 764         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 765                 hw->w = (((buf[0] & 0x30) >> 2) |
 766                          ((buf[0] & 0x04) >> 1) |
 767                          ((buf[3] & 0x04) >> 2));
 768
 769                 if ((SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 770                         SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)) &&
 771                     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 /*
1037  *  called for each full received packet from the touchpad
1038  */
1039 static void synaptics_process_packet(struct psmouse *psmouse)
1040 {
1041         struct input_dev *dev = psmouse->dev;
1042         struct synaptics_data *priv = psmouse->private;
1043         struct synaptics_device_info *info = &priv->info;
1044         struct synaptics_hw_state hw;
1045         int num_fingers;
1046         int finger_width;
1047
1048         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1049                 return;
1050
1051         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1052                 synaptics_image_sensor_process(psmouse, &hw);
1053                 return;
1054         }
1055
1056         if (hw.scroll) {
1057                 priv->scroll += hw.scroll;
1058
1059                 while (priv->scroll >= 4) {
1060                         input_report_key(dev, BTN_BACK, !hw.down);
1061                         input_sync(dev);
1062                         input_report_key(dev, BTN_BACK, hw.down);
1063                         input_sync(dev);
1064                         priv->scroll -= 4;
1065                 }
1066                 while (priv->scroll <= -4) {
1067                         input_report_key(dev, BTN_FORWARD, !hw.up);
1068                         input_sync(dev);
1069                         input_report_key(dev, BTN_FORWARD, hw.up);
1070                         input_sync(dev);
1071                         priv->scroll += 4;
1072                 }
1073                 return;
1074         }
1075
1076         if (hw.z > 0 && hw.x > 1) {
1077                 num_fingers = 1;
1078                 finger_width = 5;
1079                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1080                         switch (hw.w) {
1081                         case 0 ... 1:
1082                                 if (SYN_CAP_MULTIFINGER(info->capabilities))
1083                                         num_fingers = hw.w + 2;
1084                                 break;
1085                         case 2:
1086                                 if (SYN_MODEL_PEN(info->model_id))
1087                                         ;   /* Nothing, treat a pen as a single finger */
1088                                 break;
1089                         case 4 ... 15:
1090                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1091                                         finger_width = hw.w;
1092                                 break;
1093                         }
1094                 }
1095         } else {
1096                 num_fingers = 0;
1097                 finger_width = 0;
1098         }
1099
1100         if (cr48_profile_sensor) {
1101                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1102                 return;
1103         }
1104
1105         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1106                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1107                                               num_fingers);
1108
1109         /* Post events
1110          * BTN_TOUCH has to be first as mousedev relies on it when doing
1111          * absolute -> relative conversion
1112          */
1113         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1114         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1115
1116         if (num_fingers > 0) {
1117                 input_report_abs(dev, ABS_X, hw.x);
1118                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1119         }
1120         input_report_abs(dev, ABS_PRESSURE, hw.z);
1121
1122         if (SYN_CAP_PALMDETECT(info->capabilities))
1123                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1124
1125         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1126         if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1127                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1128                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1129         }
1130
1131         synaptics_report_buttons(psmouse, &hw);
1132
1133         input_sync(dev);
1134 }
1135
1136 static bool synaptics_validate_byte(struct psmouse *psmouse,
1137                                     int idx, enum synaptics_pkt_type pkt_type)
1138 {
1139         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1140         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1141         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1142         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1143         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1144         const u8 *packet = psmouse->packet;
1145
1146         if (idx < 0 || idx > 4)
1147                 return false;
1148
1149         switch (pkt_type) {
1150
1151         case SYN_NEWABS:
1152         case SYN_NEWABS_RELAXED:
1153                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1154
1155         case SYN_NEWABS_STRICT:
1156                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1157
1158         case SYN_OLDABS:
1159                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1160
1161         default:
1162                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1163                 return false;
1164         }
1165 }
1166
1167 static enum synaptics_pkt_type
1168 synaptics_detect_pkt_type(struct psmouse *psmouse)
1169 {
1170         int i;
1171
1172         for (i = 0; i < 5; i++) {
1173                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1174                         psmouse_info(psmouse, "using relaxed packet validation\n");
1175                         return SYN_NEWABS_RELAXED;
1176                 }
1177         }
1178
1179         return SYN_NEWABS_STRICT;
1180 }
1181
1182 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1183 {
1184         struct synaptics_data *priv = psmouse->private;
1185
1186         if (psmouse->pktcnt >= 6) { /* Full packet received */
1187                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1188                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1189
1190                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1191                     synaptics_is_pt_packet(psmouse->packet)) {
1192                         if (priv->pt_port)
1193                                 synaptics_pass_pt_packet(priv->pt_port,
1194                                                          psmouse->packet);
1195                 } else
1196                         synaptics_process_packet(psmouse);
1197
1198                 return PSMOUSE_FULL_PACKET;
1199         }
1200
1201         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1202                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1203 }
1204
1205 /*****************************************************************************
1206  *      Driver initialization/cleanup functions
1207  ****************************************************************************/
1208 static void set_abs_position_params(struct input_dev *dev,
1209                                     struct synaptics_device_info *info,
1210                                     int x_code, int y_code)
1211 {
1212         int x_min = info->x_min ?: XMIN_NOMINAL;
1213         int x_max = info->x_max ?: XMAX_NOMINAL;
1214         int y_min = info->y_min ?: YMIN_NOMINAL;
1215         int y_max = info->y_max ?: YMAX_NOMINAL;
1216         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1217                         SYN_REDUCED_FILTER_FUZZ : 0;
1218
1219         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1220         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1221         input_abs_set_res(dev, x_code, info->x_res);
1222         input_abs_set_res(dev, y_code, info->y_res);
1223 }
1224
1225 static void set_input_params(struct psmouse *psmouse,
1226                              struct synaptics_data *priv)
1227 {
1228         struct input_dev *dev = psmouse->dev;
1229         struct synaptics_device_info *info = &priv->info;
1230         int i;
1231
1232         /* Things that apply to both modes */
1233         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1234         __set_bit(EV_KEY, dev->evbit);
1235         __set_bit(BTN_LEFT, dev->keybit);
1236         __set_bit(BTN_RIGHT, dev->keybit);
1237
1238         if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1239                 __set_bit(BTN_MIDDLE, dev->keybit);
1240
1241         if (!priv->absolute_mode) {
1242                 /* Relative mode */
1243                 __set_bit(EV_REL, dev->evbit);
1244                 __set_bit(REL_X, dev->relbit);
1245                 __set_bit(REL_Y, dev->relbit);
1246                 return;
1247         }
1248
1249         /* Absolute mode */
1250         __set_bit(EV_ABS, dev->evbit);
1251         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1252         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1253
1254         if (cr48_profile_sensor)
1255                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1256
1257         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1258                 set_abs_position_params(dev, info,
1259                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1260                 /* Image sensors can report per-contact pressure */
1261                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1262                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1263
1264                 /* Image sensors can signal 4 and 5 finger clicks */
1265                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1266                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1267         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1268                 set_abs_position_params(dev, info,
1269                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1270                 /*
1271                  * Profile sensor in CR-48 tracks contacts reasonably well,
1272                  * other non-image sensors with AGM use semi-mt.
1273                  */
1274                 input_mt_init_slots(dev, 2,
1275                                     INPUT_MT_POINTER |
1276                                     (cr48_profile_sensor ?
1277                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1278         }
1279
1280         if (SYN_CAP_PALMDETECT(info->capabilities))
1281                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1282
1283         __set_bit(BTN_TOUCH, dev->keybit);
1284         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1285
1286         if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1287                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1288                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1289         }
1290
1291         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1292             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1293                 __set_bit(BTN_FORWARD, dev->keybit);
1294                 __set_bit(BTN_BACK, dev->keybit);
1295         }
1296
1297         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1298                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1299                         __set_bit(BTN_0 + i, dev->keybit);
1300
1301         __clear_bit(EV_REL, dev->evbit);
1302         __clear_bit(REL_X, dev->relbit);
1303         __clear_bit(REL_Y, dev->relbit);
1304
1305         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1306                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1307                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1308                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1309                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1310                 /* Clickpads report only left button */
1311                 __clear_bit(BTN_RIGHT, dev->keybit);
1312                 __clear_bit(BTN_MIDDLE, dev->keybit);
1313         }
1314 }
1315
1316 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1317                                               void *data, char *buf)
1318 {
1319         struct synaptics_data *priv = psmouse->private;
1320
1321         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1322 }
1323
1324 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1325                                              void *data, const char *buf,
1326                                              size_t len)
1327 {
1328         struct synaptics_data *priv = psmouse->private;
1329         unsigned int value;
1330         int err;
1331
1332         err = kstrtouint(buf, 10, &value);
1333         if (err)
1334                 return err;
1335
1336         if (value > 1)
1337                 return -EINVAL;
1338
1339         if (value == priv->disable_gesture)
1340                 return len;
1341
1342         priv->disable_gesture = value;
1343         if (value)
1344                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1345         else
1346                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1347
1348         if (synaptics_mode_cmd(psmouse, priv->mode))
1349                 return -EIO;
1350
1351         return len;
1352 }
1353
1354 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1355                     synaptics_show_disable_gesture,
1356                     synaptics_set_disable_gesture);
1357
1358 static void synaptics_disconnect(struct psmouse *psmouse)
1359 {
1360         struct synaptics_data *priv = psmouse->private;
1361
1362         /*
1363          * We might have left a breadcrumb when trying to
1364          * set up SMbus companion.
1365          */
1366         psmouse_smbus_cleanup(psmouse);
1367
1368         if (!priv->absolute_mode &&
1369                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1370                 device_remove_file(&psmouse->ps2dev.serio->dev,
1371                                    &psmouse_attr_disable_gesture.dattr);
1372
1373         synaptics_reset(psmouse);
1374         kfree(priv);
1375         psmouse->private = NULL;
1376 }
1377
1378 static int synaptics_reconnect(struct psmouse *psmouse)
1379 {
1380         struct synaptics_data *priv = psmouse->private;
1381         struct synaptics_device_info info;
1382         u8 param[2];
1383         int retry = 0;
1384         int error;
1385
1386         do {
1387                 psmouse_reset(psmouse);
1388                 if (retry) {
1389                         /*
1390                          * On some boxes, right after resuming, the touchpad
1391                          * needs some time to finish initializing (I assume
1392                          * it needs time to calibrate) and start responding
1393                          * to Synaptics-specific queries, so let's wait a
1394                          * bit.
1395                          */
1396                         ssleep(1);
1397                 }
1398                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1399                 error = synaptics_detect(psmouse, 0);
1400         } while (error && ++retry < 3);
1401
1402         if (error)
1403                 return error;
1404
1405         if (retry > 1)
1406                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1407
1408         error = synaptics_query_hardware(psmouse, &info);
1409         if (error) {
1410                 psmouse_err(psmouse, "Unable to query device.\n");
1411                 return error;
1412         }
1413
1414         error = synaptics_set_mode(psmouse);
1415         if (error) {
1416                 psmouse_err(psmouse, "Unable to initialize device.\n");
1417                 return error;
1418         }
1419
1420         if (info.identity != priv->info.identity ||
1421             info.model_id != priv->info.model_id ||
1422             info.capabilities != priv->info.capabilities ||
1423             info.ext_cap != priv->info.ext_cap) {
1424                 psmouse_err(psmouse,
1425                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1426                             priv->info.identity, info.identity,
1427                             priv->info.model_id, info.model_id,
1428                             priv->info.capabilities, info.capabilities,
1429                             priv->info.ext_cap, info.ext_cap);
1430                 return -ENXIO;
1431         }
1432
1433         return 0;
1434 }
1435
1436 static bool impaired_toshiba_kbc;
1437
1438 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1439 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1440         {
1441                 /* Toshiba Satellite */
1442                 .matches = {
1443                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1444                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1445                 },
1446         },
1447         {
1448                 /* Toshiba Dynabook */
1449                 .matches = {
1450                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1451                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1452                 },
1453         },
1454         {
1455                 /* Toshiba Portege M300 */
1456                 .matches = {
1457                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1458                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1459                 },
1460
1461         },
1462         {
1463                 /* Toshiba Portege M300 */
1464                 .matches = {
1465                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1466                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1467                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1468                 },
1469
1470         },
1471 #endif
1472         { }
1473 };
1474
1475 static bool broken_olpc_ec;
1476
1477 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1478 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1479         {
1480                 /* OLPC XO-1 or XO-1.5 */
1481                 .matches = {
1482                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1483                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1484                 },
1485         },
1486 #endif
1487         { }
1488 };
1489
1490 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1491 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1492         {
1493                 /* Cr-48 Chromebook (Codename Mario) */
1494                 .matches = {
1495                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1496                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1497                 },
1498         },
1499 #endif
1500         { }
1501 };
1502
1503 void __init synaptics_module_init(void)
1504 {
1505         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1506         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1507         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1508 }
1509
1510 static int synaptics_init_ps2(struct psmouse *psmouse,
1511                               struct synaptics_device_info *info,
1512                               bool absolute_mode)
1513 {
1514         struct synaptics_data *priv;
1515         int err;
1516
1517         synaptics_apply_quirks(psmouse, info);
1518
1519         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1520         if (!priv)
1521                 return -ENOMEM;
1522
1523         priv->info = *info;
1524         priv->absolute_mode = absolute_mode;
1525         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1526                 priv->disable_gesture = true;
1527
1528         /*
1529          * Unfortunately ForcePad capability is not exported over PS/2,
1530          * so we have to resort to checking PNP IDs.
1531          */
1532         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1533
1534         err = synaptics_set_mode(psmouse);
1535         if (err) {
1536                 psmouse_err(psmouse, "Unable to initialize device.\n");
1537                 goto init_fail;
1538         }
1539
1540         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1541                                         SYN_NEWABS : SYN_OLDABS;
1542
1543         psmouse_info(psmouse,
1544                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1545                      SYN_ID_MODEL(info->identity),
1546                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1547                      info->model_id,
1548                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1549                      info->ext_cap_10, info->board_id, info->firmware_id);
1550
1551         set_input_params(psmouse, priv);
1552
1553         /*
1554          * Encode touchpad model so that it can be used to set
1555          * input device->id.version and be visible to userspace.
1556          * Because version is __u16 we have to drop something.
1557          * Hardware info bits seem to be good candidates as they
1558          * are documented to be for Synaptics corp. internal use.
1559          */
1560         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1561                           (info->model_id & 0x000000ff);
1562
1563         if (absolute_mode) {
1564                 psmouse->protocol_handler = synaptics_process_byte;
1565                 psmouse->pktsize = 6;
1566         } else {
1567                 /* Relative mode follows standard PS/2 mouse protocol */
1568                 psmouse->protocol_handler = psmouse_process_byte;
1569                 psmouse->pktsize = 3;
1570         }
1571
1572         psmouse->set_rate = synaptics_set_rate;
1573         psmouse->disconnect = synaptics_disconnect;
1574         psmouse->reconnect = synaptics_reconnect;
1575         psmouse->cleanup = synaptics_reset;
1576         /* Synaptics can usually stay in sync without extra help */
1577         psmouse->resync_time = 0;
1578
1579         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1580                 synaptics_pt_create(psmouse);
1581
1582         /*
1583          * Toshiba's KBC seems to have trouble handling data from
1584          * Synaptics at full rate.  Switch to a lower rate (roughly
1585          * the same rate as a standard PS/2 mouse).
1586          */
1587         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1588                 psmouse_info(psmouse,
1589                              "Toshiba %s detected, limiting rate to 40pps.\n",
1590                              dmi_get_system_info(DMI_PRODUCT_NAME));
1591                 psmouse->rate = 40;
1592         }
1593
1594         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1595                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1596                                          &psmouse_attr_disable_gesture.dattr);
1597                 if (err) {
1598                         psmouse_err(psmouse,
1599                                     "Failed to create disable_gesture attribute (%d)",
1600                                     err);
1601                         goto init_fail;
1602                 }
1603         }
1604
1605         return 0;
1606
1607  init_fail:
1608         kfree(priv);
1609         return err;
1610 }
1611
1612 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1613 {
1614         struct synaptics_device_info info;
1615         int error;
1616
1617         psmouse_reset(psmouse);
1618
1619         error = synaptics_query_hardware(psmouse, &info);
1620         if (error) {
1621                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1622                 return error;
1623         }
1624
1625         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1626 }
1627
1628 int synaptics_init_absolute(struct psmouse *psmouse)
1629 {
1630         return __synaptics_init(psmouse, true);
1631 }
1632
1633 int synaptics_init_relative(struct psmouse *psmouse)
1634 {
1635         return __synaptics_init(psmouse, false);
1636 }
1637
1638 static int synaptics_setup_ps2(struct psmouse *psmouse,
1639                                struct synaptics_device_info *info)
1640 {
1641         bool absolute_mode = true;
1642         int error;
1643
1644         /*
1645          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1646          * packet spew overloads the EC such that key presses on the keyboard
1647          * are missed.  Given that, don't even attempt to use Absolute mode.
1648          * Relative mode seems to work just fine.
1649          */
1650         if (broken_olpc_ec) {
1651                 psmouse_info(psmouse,
1652                              "OLPC XO detected, forcing relative protocol.\n");
1653                 absolute_mode = false;
1654         }
1655
1656         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1657         if (error)
1658                 return error;
1659
1660         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1661 }
1662
1663 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1664
1665 void __init synaptics_module_init(void)
1666 {
1667 }
1668
1669 static int __maybe_unused
1670 synaptics_setup_ps2(struct psmouse *psmouse,
1671                     struct synaptics_device_info *info)
1672 {
1673         return -ENOSYS;
1674 }
1675
1676 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1677
1678 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1679
1680 /*
1681  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1682  * provides a better bandwidth and allow a better control of the touchpads.
1683  * This is used to decide if we need to use this bus or not.
1684  */
1685 enum {
1686         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1687         SYNAPTICS_INTERTOUCH_OFF,
1688         SYNAPTICS_INTERTOUCH_ON,
1689 };
1690
1691 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1692                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1693 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1694 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1695
1696 static int synaptics_create_intertouch(struct psmouse *psmouse,
1697                                        struct synaptics_device_info *info,
1698                                        bool leave_breadcrumbs)
1699 {
1700         bool topbuttonpad =
1701                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1702                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1703         const struct rmi_device_platform_data pdata = {
1704                 .sensor_pdata = {
1705                         .sensor_type = rmi_sensor_touchpad,
1706                         .axis_align.flip_y = true,
1707                         /* to prevent cursors jumps: */
1708                         .kernel_tracking = true,
1709                         .topbuttonpad = topbuttonpad,
1710                 },
1711                 .f30_data = {
1712                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1713                         .trackstick_buttons =
1714                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1715                 },
1716         };
1717         const struct i2c_board_info intertouch_board = {
1718                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1719                 .flags = I2C_CLIENT_HOST_NOTIFY,
1720         };
1721
1722         return psmouse_smbus_init(psmouse, &intertouch_board,
1723                                   &pdata, sizeof(pdata),
1724                                   leave_breadcrumbs);
1725 }
1726
1727 /**
1728  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1729  * and decides to instantiate a SMBus InterTouch device.
1730  */
1731 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1732                                       struct synaptics_device_info *info,
1733                                       bool leave_breadcrumbs)
1734 {
1735         int error;
1736
1737         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1738                 return -ENXIO;
1739
1740         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1741                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1742                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1743
1744                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1745                                 psmouse_info(psmouse,
1746                                              "Your touchpad (%s) says it can support a different bus. "
1747                                              "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",
1748                                              psmouse->ps2dev.serio->firmware_id);
1749
1750                         return -ENXIO;
1751                 }
1752         }
1753
1754         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1755
1756         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1757         if (error) {
1758                 if (error == -EAGAIN)
1759                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1760                 else
1761                         psmouse_err(psmouse, "unable to create intertouch device\n");
1762
1763                 return error;
1764         }
1765
1766         return 0;
1767 }
1768
1769 int synaptics_init_smbus(struct psmouse *psmouse)
1770 {
1771         struct synaptics_device_info info;
1772         int error;
1773
1774         psmouse_reset(psmouse);
1775
1776         error = synaptics_query_hardware(psmouse, &info);
1777         if (error) {
1778                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1779                 return error;
1780         }
1781
1782         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1783                 return -ENXIO;
1784
1785         return synaptics_create_intertouch(psmouse, &info, false);
1786 }
1787
1788 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1789
1790 static int __maybe_unused
1791 synaptics_setup_intertouch(struct psmouse *psmouse,
1792                            struct synaptics_device_info *info,
1793                            bool leave_breadcrumbs)
1794 {
1795         return -ENOSYS;
1796 }
1797
1798 int synaptics_init_smbus(struct psmouse *psmouse)
1799 {
1800         return -ENOSYS;
1801 }
1802
1803 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1804
1805 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1806     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1807
1808 int synaptics_init(struct psmouse *psmouse)
1809 {
1810         struct synaptics_device_info info;
1811         int error;
1812         int retval;
1813
1814         psmouse_reset(psmouse);
1815
1816         error = synaptics_query_hardware(psmouse, &info);
1817         if (error) {
1818                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1819                 return error;
1820         }
1821
1822         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1823                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1824                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1825                     /* Forcepads need F21, which is not ready */
1826                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1827                         psmouse_warn(psmouse,
1828                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1829                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1830                 }
1831
1832                 error = synaptics_setup_intertouch(psmouse, &info, true);
1833                 if (!error)
1834                         return PSMOUSE_SYNAPTICS_SMBUS;
1835         }
1836
1837         retval = synaptics_setup_ps2(psmouse, &info);
1838         if (retval < 0) {
1839                 /*
1840                  * Not using any flavor of Synaptics support, so clean up
1841                  * SMbus breadcrumbs, if any.
1842                  */
1843                 psmouse_smbus_cleanup(psmouse);
1844         }
1845
1846         return retval;
1847 }
1848
1849 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1850
1851 int synaptics_init(struct psmouse *psmouse)
1852 {
1853         return -ENOSYS;
1854 }
1855
1856 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */