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/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /*****************************************************************************
  71  *      Stuff we need even when we do not want native Synaptics support
  72  ****************************************************************************/
  73
  74 /*
  75  * Set the synaptics touchpad mode byte by special commands
  76  */
  77 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  78 {
  79         unsigned char param[1];
  80
  81         if (psmouse_sliced_command(psmouse, mode))
  82                 return -1;
  83         param[0] = SYN_PS_SET_MODE2;
  84         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  85                 return -1;
  86         return 0;
  87 }
  88
  89 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  90 {
  91         struct ps2dev *ps2dev = &psmouse->ps2dev;
  92         unsigned char param[4];
  93
  94         param[0] = 0;
  95
  96         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  97         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  98         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 101
 102         if (param[1] != 0x47)
 103                 return -ENODEV;
 104
 105         if (set_properties) {
 106                 psmouse->vendor = "Synaptics";
 107                 psmouse->name = "TouchPad";
 108         }
 109
 110         return 0;
 111 }
 112
 113 void synaptics_reset(struct psmouse *psmouse)
 114 {
 115         /* reset touchpad back to relative mode, gestures enabled */
 116         synaptics_mode_cmd(psmouse, 0);
 117 }
 118
 119 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 120
 121 static bool cr48_profile_sensor;
 122
 123 struct min_max_quirk {
 124         const char * const *pnp_ids;
 125         int x_min, x_max, y_min, y_max;
 126 };
 127
 128 static const struct min_max_quirk min_max_pnpid_table[] = {
 129         {
 130                 (const char * const []){"LEN0033", NULL},
 131                 1024, 5052, 2258, 4832
 132         },
 133         {
 134                 (const char * const []){"LEN0035", "LEN0042", NULL},
 135                 1232, 5710, 1156, 4696
 136         },
 137         {
 138                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 139                                         "LEN0039", "LEN2002", "LEN2004",
 140                                         NULL},
 141                 1024, 5112, 2024, 4832
 142         },
 143         {
 144                 (const char * const []){"LEN2001", NULL},
 145                 1024, 5022, 2508, 4832
 146         },
 147         {
 148                 (const char * const []){"LEN2006", NULL},
 149                 1264, 5675, 1171, 4688
 150         },
 151         { }
 152 };
 153
 154 /* This list has been kindly provided by Synaptics. */
 155 static const char * const topbuttonpad_pnp_ids[] = {
 156         "LEN0017",
 157         "LEN0018",
 158         "LEN0019",
 159         "LEN0023",
 160         "LEN002A",
 161         "LEN002B",
 162         "LEN002C",
 163         "LEN002D",
 164         "LEN002E",
 165         "LEN0033", /* Helix */
 166         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 167         "LEN0035", /* X240 */
 168         "LEN0036", /* T440 */
 169         "LEN0037", /* X1 Carbon 2nd */
 170         "LEN0038",
 171         "LEN0039", /* T440s */
 172         "LEN0041",
 173         "LEN0042", /* Yoga */
 174         "LEN0045",
 175         "LEN0046",
 176         "LEN0047",
 177         "LEN0048",
 178         "LEN0049",
 179         "LEN2000",
 180         "LEN2001", /* Edge E431 */
 181         "LEN2002", /* Edge E531 */
 182         "LEN2003",
 183         "LEN2004", /* L440 */
 184         "LEN2005",
 185         "LEN2006",
 186         "LEN2007",
 187         "LEN2008",
 188         "LEN2009",
 189         "LEN200A",
 190         "LEN200B",
 191         NULL
 192 };
 193
 194 /*****************************************************************************
 195  *      Synaptics communications functions
 196  ****************************************************************************/
 197
 198 /*
 199  * Synaptics touchpads report the y coordinate from bottom to top, which is
 200  * opposite from what userspace expects.
 201  * This function is used to invert y before reporting.
 202  */
 203 static int synaptics_invert_y(int y)
 204 {
 205         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 206 }
 207
 208 /*
 209  * Send a command to the synpatics touchpad by special commands
 210  */
 211 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 212 {
 213         if (psmouse_sliced_command(psmouse, c))
 214                 return -1;
 215         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 216                 return -1;
 217         return 0;
 218 }
 219
 220 /*
 221  * Read the model-id bytes from the touchpad
 222  * see also SYN_MODEL_* macros
 223  */
 224 static int synaptics_model_id(struct psmouse *psmouse)
 225 {
 226         struct synaptics_data *priv = psmouse->private;
 227         unsigned char mi[3];
 228
 229         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 230                 return -1;
 231         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 232         return 0;
 233 }
 234
 235 /*
 236  * Read the board id from the touchpad
 237  * The board id is encoded in the "QUERY MODES" response
 238  */
 239 static int synaptics_board_id(struct psmouse *psmouse)
 240 {
 241         struct synaptics_data *priv = psmouse->private;
 242         unsigned char bid[3];
 243
 244         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 245                 return -1;
 246         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 247         return 0;
 248 }
 249
 250 /*
 251  * Read the firmware id from the touchpad
 252  */
 253 static int synaptics_firmware_id(struct psmouse *psmouse)
 254 {
 255         struct synaptics_data *priv = psmouse->private;
 256         unsigned char fwid[3];
 257
 258         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 259                 return -1;
 260         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 261         return 0;
 262 }
 263
 264 /*
 265  * Read the capability-bits from the touchpad
 266  * see also the SYN_CAP_* macros
 267  */
 268 static int synaptics_capability(struct psmouse *psmouse)
 269 {
 270         struct synaptics_data *priv = psmouse->private;
 271         unsigned char cap[3];
 272
 273         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 274                 return -1;
 275         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 276         priv->ext_cap = priv->ext_cap_0c = 0;
 277
 278         /*
 279          * Older firmwares had submodel ID fixed to 0x47
 280          */
 281         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 282             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 283                 return -1;
 284         }
 285
 286         /*
 287          * Unless capExtended is set the rest of the flags should be ignored
 288          */
 289         if (!SYN_CAP_EXTENDED(priv->capabilities))
 290                 priv->capabilities = 0;
 291
 292         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 293                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 294                         psmouse_warn(psmouse,
 295                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 296                 } else {
 297                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 298
 299                         /*
 300                          * if nExtBtn is greater than 8 it should be considered
 301                          * invalid and treated as 0
 302                          */
 303                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 304                                 priv->ext_cap &= 0xff0fff;
 305                 }
 306         }
 307
 308         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 309                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 310                         psmouse_warn(psmouse,
 311                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 312                 } else {
 313                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 314                 }
 315         }
 316
 317         return 0;
 318 }
 319
 320 /*
 321  * Identify Touchpad
 322  * See also the SYN_ID_* macros
 323  */
 324 static int synaptics_identify(struct psmouse *psmouse)
 325 {
 326         struct synaptics_data *priv = psmouse->private;
 327         unsigned char id[3];
 328
 329         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 330                 return -1;
 331         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 332         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 333                 return 0;
 334         return -1;
 335 }
 336
 337 /*
 338  * Read touchpad resolution and maximum reported coordinates
 339  * Resolution is left zero if touchpad does not support the query
 340  */
 341
 342 static int synaptics_resolution(struct psmouse *psmouse)
 343 {
 344         struct synaptics_data *priv = psmouse->private;
 345         unsigned char resp[3];
 346
 347         if (SYN_ID_MAJOR(priv->identity) < 4)
 348                 return 0;
 349
 350         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 351                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 352                         priv->x_res = resp[0]; /* x resolution in units/mm */
 353                         priv->y_res = resp[2]; /* y resolution in units/mm */
 354                 }
 355         }
 356
 357         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 358             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 359                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 360                         psmouse_warn(psmouse,
 361                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 362                 } else {
 363                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 364                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 365                         psmouse_info(psmouse,
 366                                      "queried max coordinates: x [..%d], y [..%d]\n",
 367                                      priv->x_max, priv->y_max);
 368                 }
 369         }
 370
 371         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 372             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 373                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 374                         psmouse_warn(psmouse,
 375                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 376                 } else {
 377                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 378                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 379                         psmouse_info(psmouse,
 380                                      "queried min coordinates: x [%d..], y [%d..]\n",
 381                                      priv->x_min, priv->y_min);
 382                 }
 383         }
 384
 385         return 0;
 386 }
 387
 388 /*
 389  * Apply quirk(s) if the hardware matches
 390  */
 391
 392 static void synaptics_apply_quirks(struct psmouse *psmouse)
 393 {
 394         struct synaptics_data *priv = psmouse->private;
 395         int i;
 396
 397         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 398                 if (psmouse_matches_pnp_id(psmouse,
 399                                            min_max_pnpid_table[i].pnp_ids)) {
 400                         priv->x_min = min_max_pnpid_table[i].x_min;
 401                         priv->x_max = min_max_pnpid_table[i].x_max;
 402                         priv->y_min = min_max_pnpid_table[i].y_min;
 403                         priv->y_max = min_max_pnpid_table[i].y_max;
 404                         psmouse_info(psmouse,
 405                                      "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 406                                      priv->x_min, priv->x_max,
 407                                      priv->y_min, priv->y_max);
 408                         break;
 409                 }
 410         }
 411 }
 412
 413 static int synaptics_query_hardware(struct psmouse *psmouse)
 414 {
 415         if (synaptics_identify(psmouse))
 416                 return -1;
 417         if (synaptics_model_id(psmouse))
 418                 return -1;
 419         if (synaptics_firmware_id(psmouse))
 420                 return -1;
 421         if (synaptics_board_id(psmouse))
 422                 return -1;
 423         if (synaptics_capability(psmouse))
 424                 return -1;
 425         if (synaptics_resolution(psmouse))
 426                 return -1;
 427
 428         synaptics_apply_quirks(psmouse);
 429
 430         return 0;
 431 }
 432
 433 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 434 {
 435         static unsigned char param = 0xc8;
 436         struct synaptics_data *priv = psmouse->private;
 437
 438         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 439               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 440                 return 0;
 441
 442         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 443                 return -1;
 444
 445         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 446                 return -1;
 447
 448         /* Advanced gesture mode also sends multi finger data */
 449         priv->capabilities |= BIT(1);
 450
 451         return 0;
 452 }
 453
 454 static int synaptics_set_mode(struct psmouse *psmouse)
 455 {
 456         struct synaptics_data *priv = psmouse->private;
 457
 458         priv->mode = 0;
 459         if (priv->absolute_mode)
 460                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 461         if (priv->disable_gesture)
 462                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 463         if (psmouse->rate >= 80)
 464                 priv->mode |= SYN_BIT_HIGH_RATE;
 465         if (SYN_CAP_EXTENDED(priv->capabilities))
 466                 priv->mode |= SYN_BIT_W_MODE;
 467
 468         if (synaptics_mode_cmd(psmouse, priv->mode))
 469                 return -1;
 470
 471         if (priv->absolute_mode &&
 472             synaptics_set_advanced_gesture_mode(psmouse)) {
 473                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 474                 return -1;
 475         }
 476
 477         return 0;
 478 }
 479
 480 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 481 {
 482         struct synaptics_data *priv = psmouse->private;
 483
 484         if (rate >= 80) {
 485                 priv->mode |= SYN_BIT_HIGH_RATE;
 486                 psmouse->rate = 80;
 487         } else {
 488                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 489                 psmouse->rate = 40;
 490         }
 491
 492         synaptics_mode_cmd(psmouse, priv->mode);
 493 }
 494
 495 /*****************************************************************************
 496  *      Synaptics pass-through PS/2 port support
 497  ****************************************************************************/
 498 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 499 {
 500         struct psmouse *parent = serio_get_drvdata(serio->parent);
 501         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 502
 503         if (psmouse_sliced_command(parent, c))
 504                 return -1;
 505         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 506                 return -1;
 507         return 0;
 508 }
 509
 510 static int synaptics_pt_start(struct serio *serio)
 511 {
 512         struct psmouse *parent = serio_get_drvdata(serio->parent);
 513         struct synaptics_data *priv = parent->private;
 514
 515         serio_pause_rx(parent->ps2dev.serio);
 516         priv->pt_port = serio;
 517         serio_continue_rx(parent->ps2dev.serio);
 518
 519         return 0;
 520 }
 521
 522 static void synaptics_pt_stop(struct serio *serio)
 523 {
 524         struct psmouse *parent = serio_get_drvdata(serio->parent);
 525         struct synaptics_data *priv = parent->private;
 526
 527         serio_pause_rx(parent->ps2dev.serio);
 528         priv->pt_port = NULL;
 529         serio_continue_rx(parent->ps2dev.serio);
 530 }
 531
 532 static int synaptics_is_pt_packet(unsigned char *buf)
 533 {
 534         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 535 }
 536
 537 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 538 {
 539         struct psmouse *child = serio_get_drvdata(ptport);
 540
 541         if (child && child->state == PSMOUSE_ACTIVATED) {
 542                 serio_interrupt(ptport, packet[1], 0);
 543                 serio_interrupt(ptport, packet[4], 0);
 544                 serio_interrupt(ptport, packet[5], 0);
 545                 if (child->pktsize == 4)
 546                         serio_interrupt(ptport, packet[2], 0);
 547         } else
 548                 serio_interrupt(ptport, packet[1], 0);
 549 }
 550
 551 static void synaptics_pt_activate(struct psmouse *psmouse)
 552 {
 553         struct synaptics_data *priv = psmouse->private;
 554         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 555
 556         /* adjust the touchpad to child's choice of protocol */
 557         if (child) {
 558                 if (child->pktsize == 4)
 559                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 560                 else
 561                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 562
 563                 if (synaptics_mode_cmd(psmouse, priv->mode))
 564                         psmouse_warn(psmouse,
 565                                      "failed to switch guest protocol\n");
 566         }
 567 }
 568
 569 static void synaptics_pt_create(struct psmouse *psmouse)
 570 {
 571         struct serio *serio;
 572
 573         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 574         if (!serio) {
 575                 psmouse_err(psmouse,
 576                             "not enough memory for pass-through port\n");
 577                 return;
 578         }
 579
 580         serio->id.type = SERIO_PS_PSTHRU;
 581         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 582         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 583         serio->write = synaptics_pt_write;
 584         serio->start = synaptics_pt_start;
 585         serio->stop = synaptics_pt_stop;
 586         serio->parent = psmouse->ps2dev.serio;
 587
 588         psmouse->pt_activate = synaptics_pt_activate;
 589
 590         psmouse_info(psmouse, "serio: %s port at %s\n",
 591                      serio->name, psmouse->phys);
 592         serio_register_port(serio);
 593 }
 594
 595 /*****************************************************************************
 596  *      Functions to interpret the absolute mode packets
 597  ****************************************************************************/
 598
 599 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 600                                    int sgm, int agm)
 601 {
 602         state->count = count;
 603         state->sgm = sgm;
 604         state->agm = agm;
 605 }
 606
 607 static void synaptics_parse_agm(const unsigned char buf[],
 608                                 struct synaptics_data *priv,
 609                                 struct synaptics_hw_state *hw)
 610 {
 611         struct synaptics_hw_state *agm = &priv->agm;
 612         int agm_packet_type;
 613
 614         agm_packet_type = (buf[5] & 0x30) >> 4;
 615         switch (agm_packet_type) {
 616         case 1:
 617                 /* Gesture packet: (x, y, z) half resolution */
 618                 agm->w = hw->w;
 619                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 620                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 621                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 622                 break;
 623
 624         case 2:
 625                 /* AGM-CONTACT packet: (count, sgm, agm) */
 626                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 627                 break;
 628
 629         default:
 630                 break;
 631         }
 632
 633         /* Record that at least one AGM has been received since last SGM */
 634         priv->agm_pending = true;
 635 }
 636
 637 static bool is_forcepad;
 638
 639 static int synaptics_parse_hw_state(const unsigned char buf[],
 640                                     struct synaptics_data *priv,
 641                                     struct synaptics_hw_state *hw)
 642 {
 643         memset(hw, 0, sizeof(struct synaptics_hw_state));
 644
 645         if (SYN_MODEL_NEWABS(priv->model_id)) {
 646                 hw->w = (((buf[0] & 0x30) >> 2) |
 647                          ((buf[0] & 0x04) >> 1) |
 648                          ((buf[3] & 0x04) >> 2));
 649
 650                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 651                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 652                     hw->w == 2) {
 653                         synaptics_parse_agm(buf, priv, hw);
 654                         return 1;
 655                 }
 656
 657                 hw->x = (((buf[3] & 0x10) << 8) |
 658                          ((buf[1] & 0x0f) << 8) |
 659                          buf[4]);
 660                 hw->y = (((buf[3] & 0x20) << 7) |
 661                          ((buf[1] & 0xf0) << 4) |
 662                          buf[5]);
 663                 hw->z = buf[2];
 664
 665                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 666                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 667
 668                 if (is_forcepad) {
 669                         /*
 670                          * ForcePads, like Clickpads, use middle button
 671                          * bits to report primary button clicks.
 672                          * Unfortunately they report primary button not
 673                          * only when user presses on the pad above certain
 674                          * threshold, but also when there are more than one
 675                          * finger on the touchpad, which interferes with
 676                          * out multi-finger gestures.
 677                          */
 678                         if (hw->z == 0) {
 679                                 /* No contacts */
 680                                 priv->press = priv->report_press = false;
 681                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 682                                 /*
 683                                  * Single-finger touch with pressure above
 684                                  * the threshold. If pressure stays long
 685                                  * enough, we'll start reporting primary
 686                                  * button. We rely on the device continuing
 687                                  * sending data even if finger does not
 688                                  * move.
 689                                  */
 690                                 if  (!priv->press) {
 691                                         priv->press_start = jiffies;
 692                                         priv->press = true;
 693                                 } else if (time_after(jiffies,
 694                                                 priv->press_start +
 695                                                         msecs_to_jiffies(50))) {
 696                                         priv->report_press = true;
 697                                 }
 698                         } else {
 699                                 priv->press = false;
 700                         }
 701
 702                         hw->left = priv->report_press;
 703
 704                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 705                         /*
 706                          * Clickpad's button is transmitted as middle button,
 707                          * however, since it is primary button, we will report
 708                          * it as BTN_LEFT.
 709                          */
 710                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 711
 712                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 713                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 714                         if (hw->w == 2)
 715                                 hw->scroll = (signed char)(buf[1]);
 716                 }
 717
 718                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 719                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 720                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 721                 }
 722
 723                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 724                     ((buf[0] ^ buf[3]) & 0x02)) {
 725                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 726                         default:
 727                                 /*
 728                                  * if nExtBtn is greater than 8 it should be
 729                                  * considered invalid and treated as 0
 730                                  */
 731                                 break;
 732                         case 8:
 733                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 734                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 735                         case 6:
 736                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 737                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 738                         case 4:
 739                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 740                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 741                         case 2:
 742                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 743                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 744                         }
 745                 }
 746         } else {
 747                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 748                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 749
 750                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 751                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 752
 753                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 754                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 755         }
 756
 757         /*
 758          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 759          * is used by some firmware to indicate a finger at the edge of
 760          * the touchpad whose precise position cannot be determined, so
 761          * convert these values to the maximum axis value.
 762          */
 763         if (hw->x > X_MAX_POSITIVE)
 764                 hw->x -= 1 << ABS_POS_BITS;
 765         else if (hw->x == X_MAX_POSITIVE)
 766                 hw->x = XMAX;
 767
 768         if (hw->y > Y_MAX_POSITIVE)
 769                 hw->y -= 1 << ABS_POS_BITS;
 770         else if (hw->y == Y_MAX_POSITIVE)
 771                 hw->y = YMAX;
 772
 773         return 0;
 774 }
 775
 776 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 777                                           bool active, int x, int y)
 778 {
 779         input_mt_slot(dev, slot);
 780         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 781         if (active) {
 782                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 783                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 784         }
 785 }
 786
 787 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 788                                           const struct synaptics_hw_state *a,
 789                                           const struct synaptics_hw_state *b,
 790                                           int num_fingers)
 791 {
 792         if (num_fingers >= 2) {
 793                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 794                                               min(a->y, b->y));
 795                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 796                                               max(a->y, b->y));
 797         } else if (num_fingers == 1) {
 798                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 799                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 800         } else {
 801                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 802                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 803         }
 804 }
 805
 806 static void synaptics_report_buttons(struct psmouse *psmouse,
 807                                      const struct synaptics_hw_state *hw)
 808 {
 809         struct input_dev *dev = psmouse->dev;
 810         struct synaptics_data *priv = psmouse->private;
 811         int i;
 812
 813         input_report_key(dev, BTN_LEFT, hw->left);
 814         input_report_key(dev, BTN_RIGHT, hw->right);
 815
 816         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 817                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 818
 819         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 820                 input_report_key(dev, BTN_FORWARD, hw->up);
 821                 input_report_key(dev, BTN_BACK, hw->down);
 822         }
 823
 824         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 825                 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
 826 }
 827
 828 static void synaptics_report_slot(struct input_dev *dev, int slot,
 829                                   const struct synaptics_hw_state *hw)
 830 {
 831         input_mt_slot(dev, slot);
 832         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 833         if (!hw)
 834                 return;
 835
 836         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 837         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 838         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 839 }
 840
 841 static void synaptics_report_mt_data(struct psmouse *psmouse,
 842                                      struct synaptics_mt_state *mt_state,
 843                                      const struct synaptics_hw_state *sgm)
 844 {
 845         struct input_dev *dev = psmouse->dev;
 846         struct synaptics_data *priv = psmouse->private;
 847         struct synaptics_hw_state *agm = &priv->agm;
 848         struct synaptics_mt_state *old = &priv->mt_state;
 849
 850         switch (mt_state->count) {
 851         case 0:
 852                 synaptics_report_slot(dev, 0, NULL);
 853                 synaptics_report_slot(dev, 1, NULL);
 854                 break;
 855         case 1:
 856                 if (mt_state->sgm == -1) {
 857                         synaptics_report_slot(dev, 0, NULL);
 858                         synaptics_report_slot(dev, 1, NULL);
 859                 } else if (mt_state->sgm == 0) {
 860                         synaptics_report_slot(dev, 0, sgm);
 861                         synaptics_report_slot(dev, 1, NULL);
 862                 } else {
 863                         synaptics_report_slot(dev, 0, NULL);
 864                         synaptics_report_slot(dev, 1, sgm);
 865                 }
 866                 break;
 867         default:
 868                 /*
 869                  * If the finger slot contained in SGM is valid, and either
 870                  * hasn't changed, or is new, or the old SGM has now moved to
 871                  * AGM, then report SGM in MTB slot 0.
 872                  * Otherwise, empty MTB slot 0.
 873                  */
 874                 if (mt_state->sgm != -1 &&
 875                     (mt_state->sgm == old->sgm ||
 876                      old->sgm == -1 || mt_state->agm == old->sgm))
 877                         synaptics_report_slot(dev, 0, sgm);
 878                 else
 879                         synaptics_report_slot(dev, 0, NULL);
 880
 881                 /*
 882                  * If the finger slot contained in AGM is valid, and either
 883                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 884                  * Otherwise, empty MTB slot 1.
 885                  *
 886                  * However, in the case where the AGM is new, make sure that
 887                  * that it is either the same as the old SGM, or there was no
 888                  * SGM.
 889                  *
 890                  * Otherwise, if the SGM was just 1, and the new AGM is 2, then
 891                  * the new AGM will keep the old SGM's tracking ID, which can
 892                  * cause apparent drumroll.  This happens if in the following
 893                  * valid finger sequence:
 894                  *
 895                  *  Action                 SGM  AGM (MTB slot:Contact)
 896                  *  1. Touch contact 0    (0:0)
 897                  *  2. Touch contact 1    (0:0, 1:1)
 898                  *  3. Lift  contact 0    (1:1)
 899                  *  4. Touch contacts 2,3 (0:2, 1:3)
 900                  *
 901                  * In step 4, contact 3, in AGM must not be given the same
 902                  * tracking ID as contact 1 had in step 3.  To avoid this,
 903                  * the first agm with contact 3 is dropped and slot 1 is
 904                  * invalidated (tracking ID = -1).
 905                  */
 906                 if (mt_state->agm != -1 &&
 907                     (mt_state->agm == old->agm ||
 908                      (old->agm == -1 &&
 909                       (old->sgm == -1 || mt_state->agm == old->sgm))))
 910                         synaptics_report_slot(dev, 1, agm);
 911                 else
 912                         synaptics_report_slot(dev, 1, NULL);
 913                 break;
 914         }
 915
 916         /* Don't use active slot count to generate BTN_TOOL events. */
 917         input_mt_report_pointer_emulation(dev, false);
 918
 919         /* Send the number of fingers reported by touchpad itself. */
 920         input_mt_report_finger_count(dev, mt_state->count);
 921
 922         synaptics_report_buttons(psmouse, sgm);
 923
 924         input_sync(dev);
 925 }
 926
 927 /* Handle case where mt_state->count = 0 */
 928 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
 929                                       struct synaptics_mt_state *mt_state)
 930 {
 931         synaptics_mt_state_set(mt_state, 0, -1, -1);
 932         priv->mt_state_lost = false;
 933 }
 934
 935 /* Handle case where mt_state->count = 1 */
 936 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
 937                                       struct synaptics_mt_state *mt_state)
 938 {
 939         struct synaptics_hw_state *agm = &priv->agm;
 940         struct synaptics_mt_state *old = &priv->mt_state;
 941
 942         /*
 943          * If the last AGM was (0,0,0), and there is only one finger left,
 944          * then we absolutely know that SGM contains slot 0, and all other
 945          * fingers have been removed.
 946          */
 947         if (priv->agm_pending && agm->z == 0) {
 948                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 949                 priv->mt_state_lost = false;
 950                 return;
 951         }
 952
 953         switch (old->count) {
 954         case 0:
 955                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 956                 break;
 957         case 1:
 958                 /*
 959                  * If mt_state_lost, then the previous transition was 3->1,
 960                  * and SGM now contains either slot 0 or 1, but we don't know
 961                  * which.  So, we just assume that the SGM now contains slot 1.
 962                  *
 963                  * If pending AGM and either:
 964                  *   (a) the previous SGM slot contains slot 0, or
 965                  *   (b) there was no SGM slot
 966                  * then, the SGM now contains slot 1
 967                  *
 968                  * Case (a) happens with very rapid "drum roll" gestures, where
 969                  * slot 0 finger is lifted and a new slot 1 finger touches
 970                  * within one reporting interval.
 971                  *
 972                  * Case (b) happens if initially two or more fingers tap
 973                  * briefly, and all but one lift before the end of the first
 974                  * reporting interval.
 975                  *
 976                  * (In both these cases, slot 0 will becomes empty, so SGM
 977                  * contains slot 1 with the new finger)
 978                  *
 979                  * Else, if there was no previous SGM, it now contains slot 0.
 980                  *
 981                  * Otherwise, SGM still contains the same slot.
 982                  */
 983                 if (priv->mt_state_lost ||
 984                     (priv->agm_pending && old->sgm <= 0))
 985                         synaptics_mt_state_set(mt_state, 1, 1, -1);
 986                 else if (old->sgm == -1)
 987                         synaptics_mt_state_set(mt_state, 1, 0, -1);
 988                 break;
 989         case 2:
 990                 /*
 991                  * If mt_state_lost, we don't know which finger SGM contains.
 992                  *
 993                  * So, report 1 finger, but with both slots empty.
 994                  * We will use slot 1 on subsequent 1->1
 995                  */
 996                 if (priv->mt_state_lost) {
 997                         synaptics_mt_state_set(mt_state, 1, -1, -1);
 998                         break;
 999                 }
1000                 /*
1001                  * Since the last AGM was NOT (0,0,0), it was the finger in
1002                  * slot 0 that has been removed.
1003                  * So, SGM now contains previous AGM's slot, and AGM is now
1004                  * empty.
1005                  */
1006                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
1007                 break;
1008         case 3:
1009                 /*
1010                  * Since last AGM was not (0,0,0), we don't know which finger
1011                  * is left.
1012                  *
1013                  * So, report 1 finger, but with both slots empty.
1014                  * We will use slot 1 on subsequent 1->1
1015                  */
1016                 synaptics_mt_state_set(mt_state, 1, -1, -1);
1017                 priv->mt_state_lost = true;
1018                 break;
1019         case 4:
1020         case 5:
1021                 /* mt_state was updated by AGM-CONTACT packet */
1022                 break;
1023         }
1024 }
1025
1026 /* Handle case where mt_state->count = 2 */
1027 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1028                                       struct synaptics_mt_state *mt_state)
1029 {
1030         struct synaptics_mt_state *old = &priv->mt_state;
1031
1032         switch (old->count) {
1033         case 0:
1034                 synaptics_mt_state_set(mt_state, 2, 0, 1);
1035                 break;
1036         case 1:
1037                 /*
1038                  * If previous SGM contained slot 1 or higher, SGM now contains
1039                  * slot 0 (the newly touching finger) and AGM contains SGM's
1040                  * previous slot.
1041                  *
1042                  * Otherwise, SGM still contains slot 0 and AGM now contains
1043                  * slot 1.
1044                  */
1045                 if (old->sgm >= 1)
1046                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1047                 else
1048                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1049                 break;
1050         case 2:
1051                 /*
1052                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
1053                  * we don't know which.
1054                  * So, we just assume that the SGM contains slot 0 and AGM 1.
1055                  */
1056                 if (priv->mt_state_lost)
1057                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1058                 /*
1059                  * Otherwise, use the same mt_state, since it either hasn't
1060                  * changed, or was updated by a recently received AGM-CONTACT
1061                  * packet.
1062                  */
1063                 break;
1064         case 3:
1065                 /*
1066                  * 3->2 transitions have two unsolvable problems:
1067                  *  1) no indication is given which finger was removed
1068                  *  2) no way to tell if agm packet was for finger 3
1069                  *     before 3->2, or finger 2 after 3->2.
1070                  *
1071                  * So, report 2 fingers, but empty all slots.
1072                  * We will guess slots [0,1] on subsequent 2->2.
1073                  */
1074                 synaptics_mt_state_set(mt_state, 2, -1, -1);
1075                 priv->mt_state_lost = true;
1076                 break;
1077         case 4:
1078         case 5:
1079                 /* mt_state was updated by AGM-CONTACT packet */
1080                 break;
1081         }
1082 }
1083
1084 /* Handle case where mt_state->count = 3 */
1085 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1086                                       struct synaptics_mt_state *mt_state)
1087 {
1088         struct synaptics_mt_state *old = &priv->mt_state;
1089
1090         switch (old->count) {
1091         case 0:
1092                 synaptics_mt_state_set(mt_state, 3, 0, 2);
1093                 break;
1094         case 1:
1095                 /*
1096                  * If previous SGM contained slot 2 or higher, SGM now contains
1097                  * slot 0 (one of the newly touching fingers) and AGM contains
1098                  * SGM's previous slot.
1099                  *
1100                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1101                  */
1102                 if (old->sgm >= 2)
1103                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1104                 else
1105                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1106                 break;
1107         case 2:
1108                 /*
1109                  * If the AGM previously contained slot 3 or higher, then the
1110                  * newly touching finger is in the lowest available slot.
1111                  *
1112                  * If SGM was previously 1 or higher, then the new SGM is
1113                  * now slot 0 (with a new finger), otherwise, the new finger
1114                  * is now in a hidden slot between 0 and AGM's slot.
1115                  *
1116                  * In all such cases, the SGM now contains slot 0, and the AGM
1117                  * continues to contain the same slot as before.
1118                  */
1119                 if (old->agm >= 3) {
1120                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1121                         break;
1122                 }
1123
1124                 /*
1125                  * After some 3->1 and all 3->2 transitions, we lose track
1126                  * of which slot is reported by SGM and AGM.
1127                  *
1128                  * For 2->3 in this state, report 3 fingers, but empty all
1129                  * slots, and we will guess (0,2) on a subsequent 0->3.
1130                  *
1131                  * To userspace, the resulting transition will look like:
1132                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1133                  */
1134                 if (priv->mt_state_lost) {
1135                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1136                         break;
1137                 }
1138
1139                 /*
1140                  * If the (SGM,AGM) really previously contained slots (0, 1),
1141                  * then we cannot know what slot was just reported by the AGM,
1142                  * because the 2->3 transition can occur either before or after
1143                  * the AGM packet. Thus, this most recent AGM could contain
1144                  * either the same old slot 1 or the new slot 2.
1145                  * Subsequent AGMs will be reporting slot 2.
1146                  *
1147                  * To userspace, the resulting transition will look like:
1148                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1149                  */
1150                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1151                 break;
1152         case 3:
1153                 /*
1154                  * If, for whatever reason, the previous agm was invalid,
1155                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1156                  */
1157                 if (old->agm <= 2)
1158                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1159                 /*
1160                  * mt_state either hasn't changed, or was updated by a recently
1161                  * received AGM-CONTACT packet.
1162                  */
1163                 break;
1164
1165         case 4:
1166         case 5:
1167                 /* mt_state was updated by AGM-CONTACT packet */
1168                 break;
1169         }
1170 }
1171
1172 /* Handle case where mt_state->count = 4, or = 5 */
1173 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1174                                        struct synaptics_mt_state *mt_state)
1175 {
1176         /* mt_state was updated correctly by AGM-CONTACT packet */
1177         priv->mt_state_lost = false;
1178 }
1179
1180 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1181                                            struct synaptics_hw_state *sgm)
1182 {
1183         struct synaptics_data *priv = psmouse->private;
1184         struct synaptics_hw_state *agm = &priv->agm;
1185         struct synaptics_mt_state mt_state;
1186
1187         /* Initialize using current mt_state (as updated by last agm) */
1188         mt_state = agm->mt_state;
1189
1190         /*
1191          * Update mt_state using the new finger count and current mt_state.
1192          */
1193         if (sgm->z == 0)
1194                 synaptics_image_sensor_0f(priv, &mt_state);
1195         else if (sgm->w >= 4)
1196                 synaptics_image_sensor_1f(priv, &mt_state);
1197         else if (sgm->w == 0)
1198                 synaptics_image_sensor_2f(priv, &mt_state);
1199         else if (sgm->w == 1 && mt_state.count <= 3)
1200                 synaptics_image_sensor_3f(priv, &mt_state);
1201         else
1202                 synaptics_image_sensor_45f(priv, &mt_state);
1203
1204         /* Send resulting input events to user space */
1205         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1206
1207         /* Store updated mt_state */
1208         priv->mt_state = agm->mt_state = mt_state;
1209         priv->agm_pending = false;
1210 }
1211
1212 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1213                                              struct synaptics_hw_state *sgm,
1214                                              int num_fingers)
1215 {
1216         struct input_dev *dev = psmouse->dev;
1217         struct synaptics_data *priv = psmouse->private;
1218         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1219         struct input_mt_pos pos[2];
1220         int slot[2], nsemi, i;
1221
1222         nsemi = clamp_val(num_fingers, 0, 2);
1223
1224         for (i = 0; i < nsemi; i++) {
1225                 pos[i].x = hw[i]->x;
1226                 pos[i].y = synaptics_invert_y(hw[i]->y);
1227         }
1228
1229         input_mt_assign_slots(dev, slot, pos, nsemi);
1230
1231         for (i = 0; i < nsemi; i++) {
1232                 input_mt_slot(dev, slot[i]);
1233                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1234                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1235                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1236                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1237         }
1238
1239         input_mt_drop_unused(dev);
1240         input_mt_report_pointer_emulation(dev, false);
1241         input_mt_report_finger_count(dev, num_fingers);
1242
1243         synaptics_report_buttons(psmouse, sgm);
1244
1245         input_sync(dev);
1246 }
1247
1248 /*
1249  *  called for each full received packet from the touchpad
1250  */
1251 static void synaptics_process_packet(struct psmouse *psmouse)
1252 {
1253         struct input_dev *dev = psmouse->dev;
1254         struct synaptics_data *priv = psmouse->private;
1255         struct synaptics_hw_state hw;
1256         int num_fingers;
1257         int finger_width;
1258
1259         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1260                 return;
1261
1262         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1263                 synaptics_image_sensor_process(psmouse, &hw);
1264                 return;
1265         }
1266
1267         if (hw.scroll) {
1268                 priv->scroll += hw.scroll;
1269
1270                 while (priv->scroll >= 4) {
1271                         input_report_key(dev, BTN_BACK, !hw.down);
1272                         input_sync(dev);
1273                         input_report_key(dev, BTN_BACK, hw.down);
1274                         input_sync(dev);
1275                         priv->scroll -= 4;
1276                 }
1277                 while (priv->scroll <= -4) {
1278                         input_report_key(dev, BTN_FORWARD, !hw.up);
1279                         input_sync(dev);
1280                         input_report_key(dev, BTN_FORWARD, hw.up);
1281                         input_sync(dev);
1282                         priv->scroll += 4;
1283                 }
1284                 return;
1285         }
1286
1287         if (hw.z > 0 && hw.x > 1) {
1288                 num_fingers = 1;
1289                 finger_width = 5;
1290                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1291                         switch (hw.w) {
1292                         case 0 ... 1:
1293                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1294                                         num_fingers = hw.w + 2;
1295                                 break;
1296                         case 2:
1297                                 if (SYN_MODEL_PEN(priv->model_id))
1298                                         ;   /* Nothing, treat a pen as a single finger */
1299                                 break;
1300                         case 4 ... 15:
1301                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1302                                         finger_width = hw.w;
1303                                 break;
1304                         }
1305                 }
1306         } else {
1307                 num_fingers = 0;
1308                 finger_width = 0;
1309         }
1310
1311         if (cr48_profile_sensor) {
1312                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1313                 return;
1314         }
1315
1316         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1317                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1318                                               num_fingers);
1319
1320         /* Post events
1321          * BTN_TOUCH has to be first as mousedev relies on it when doing
1322          * absolute -> relative conversion
1323          */
1324         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1325         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1326
1327         if (num_fingers > 0) {
1328                 input_report_abs(dev, ABS_X, hw.x);
1329                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1330         }
1331         input_report_abs(dev, ABS_PRESSURE, hw.z);
1332
1333         if (SYN_CAP_PALMDETECT(priv->capabilities))
1334                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1335
1336         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1337         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1338                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1339                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1340         }
1341
1342         synaptics_report_buttons(psmouse, &hw);
1343
1344         input_sync(dev);
1345 }
1346
1347 static int synaptics_validate_byte(struct psmouse *psmouse,
1348                                    int idx, unsigned char pkt_type)
1349 {
1350         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1351         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1352         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1353         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1354         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1355         const char *packet = psmouse->packet;
1356
1357         if (idx < 0 || idx > 4)
1358                 return 0;
1359
1360         switch (pkt_type) {
1361
1362         case SYN_NEWABS:
1363         case SYN_NEWABS_RELAXED:
1364                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1365
1366         case SYN_NEWABS_STRICT:
1367                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1368
1369         case SYN_OLDABS:
1370                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1371
1372         default:
1373                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1374                 return 0;
1375         }
1376 }
1377
1378 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1379 {
1380         int i;
1381
1382         for (i = 0; i < 5; i++)
1383                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1384                         psmouse_info(psmouse, "using relaxed packet validation\n");
1385                         return SYN_NEWABS_RELAXED;
1386                 }
1387
1388         return SYN_NEWABS_STRICT;
1389 }
1390
1391 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1392 {
1393         struct synaptics_data *priv = psmouse->private;
1394
1395         if (psmouse->pktcnt >= 6) { /* Full packet received */
1396                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1397                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1398
1399                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1400                     synaptics_is_pt_packet(psmouse->packet)) {
1401                         if (priv->pt_port)
1402                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1403                 } else
1404                         synaptics_process_packet(psmouse);
1405
1406                 return PSMOUSE_FULL_PACKET;
1407         }
1408
1409         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1410                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1411 }
1412
1413 /*****************************************************************************
1414  *      Driver initialization/cleanup functions
1415  ****************************************************************************/
1416 static void set_abs_position_params(struct input_dev *dev,
1417                                     struct synaptics_data *priv, int x_code,
1418                                     int y_code)
1419 {
1420         int x_min = priv->x_min ?: XMIN_NOMINAL;
1421         int x_max = priv->x_max ?: XMAX_NOMINAL;
1422         int y_min = priv->y_min ?: YMIN_NOMINAL;
1423         int y_max = priv->y_max ?: YMAX_NOMINAL;
1424         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1425                         SYN_REDUCED_FILTER_FUZZ : 0;
1426
1427         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1428         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1429         input_abs_set_res(dev, x_code, priv->x_res);
1430         input_abs_set_res(dev, y_code, priv->y_res);
1431 }
1432
1433 static void set_input_params(struct psmouse *psmouse,
1434                              struct synaptics_data *priv)
1435 {
1436         struct input_dev *dev = psmouse->dev;
1437         int i;
1438
1439         /* Things that apply to both modes */
1440         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1441         __set_bit(EV_KEY, dev->evbit);
1442         __set_bit(BTN_LEFT, dev->keybit);
1443         __set_bit(BTN_RIGHT, dev->keybit);
1444
1445         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1446                 __set_bit(BTN_MIDDLE, dev->keybit);
1447
1448         if (!priv->absolute_mode) {
1449                 /* Relative mode */
1450                 __set_bit(EV_REL, dev->evbit);
1451                 __set_bit(REL_X, dev->relbit);
1452                 __set_bit(REL_Y, dev->relbit);
1453                 return;
1454         }
1455
1456         /* Absolute mode */
1457         __set_bit(EV_ABS, dev->evbit);
1458         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1459         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1460
1461         if (cr48_profile_sensor)
1462                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1463
1464         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1465                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1466                                         ABS_MT_POSITION_Y);
1467                 /* Image sensors can report per-contact pressure */
1468                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1469                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1470
1471                 /* Image sensors can signal 4 and 5 finger clicks */
1472                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1473                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1474         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1475                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1476                                         ABS_MT_POSITION_Y);
1477                 /*
1478                  * Profile sensor in CR-48 tracks contacts reasonably well,
1479                  * other non-image sensors with AGM use semi-mt.
1480                  */
1481                 input_mt_init_slots(dev, 2,
1482                                     INPUT_MT_POINTER |
1483                                     (cr48_profile_sensor ?
1484                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1485         }
1486
1487         if (SYN_CAP_PALMDETECT(priv->capabilities))
1488                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1489
1490         __set_bit(BTN_TOUCH, dev->keybit);
1491         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1492
1493         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1494                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1495                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1496         }
1497
1498         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1499             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1500                 __set_bit(BTN_FORWARD, dev->keybit);
1501                 __set_bit(BTN_BACK, dev->keybit);
1502         }
1503
1504         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1505                 __set_bit(BTN_0 + i, dev->keybit);
1506
1507         __clear_bit(EV_REL, dev->evbit);
1508         __clear_bit(REL_X, dev->relbit);
1509         __clear_bit(REL_Y, dev->relbit);
1510
1511         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1512                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1513                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1514                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1515                 /* Clickpads report only left button */
1516                 __clear_bit(BTN_RIGHT, dev->keybit);
1517                 __clear_bit(BTN_MIDDLE, dev->keybit);
1518         }
1519 }
1520
1521 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1522                                               void *data, char *buf)
1523 {
1524         struct synaptics_data *priv = psmouse->private;
1525
1526         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1527 }
1528
1529 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1530                                              void *data, const char *buf,
1531                                              size_t len)
1532 {
1533         struct synaptics_data *priv = psmouse->private;
1534         unsigned int value;
1535         int err;
1536
1537         err = kstrtouint(buf, 10, &value);
1538         if (err)
1539                 return err;
1540
1541         if (value > 1)
1542                 return -EINVAL;
1543
1544         if (value == priv->disable_gesture)
1545                 return len;
1546
1547         priv->disable_gesture = value;
1548         if (value)
1549                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1550         else
1551                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1552
1553         if (synaptics_mode_cmd(psmouse, priv->mode))
1554                 return -EIO;
1555
1556         return len;
1557 }
1558
1559 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1560                     synaptics_show_disable_gesture,
1561                     synaptics_set_disable_gesture);
1562
1563 static void synaptics_disconnect(struct psmouse *psmouse)
1564 {
1565         struct synaptics_data *priv = psmouse->private;
1566
1567         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1568                 device_remove_file(&psmouse->ps2dev.serio->dev,
1569                                    &psmouse_attr_disable_gesture.dattr);
1570
1571         synaptics_reset(psmouse);
1572         kfree(priv);
1573         psmouse->private = NULL;
1574 }
1575
1576 static int synaptics_reconnect(struct psmouse *psmouse)
1577 {
1578         struct synaptics_data *priv = psmouse->private;
1579         struct synaptics_data old_priv = *priv;
1580         unsigned char param[2];
1581         int retry = 0;
1582         int error;
1583
1584         do {
1585                 psmouse_reset(psmouse);
1586                 if (retry) {
1587                         /*
1588                          * On some boxes, right after resuming, the touchpad
1589                          * needs some time to finish initializing (I assume
1590                          * it needs time to calibrate) and start responding
1591                          * to Synaptics-specific queries, so let's wait a
1592                          * bit.
1593                          */
1594                         ssleep(1);
1595                 }
1596                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1597                 error = synaptics_detect(psmouse, 0);
1598         } while (error && ++retry < 3);
1599
1600         if (error)
1601                 return -1;
1602
1603         if (retry > 1)
1604                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1605
1606         if (synaptics_query_hardware(psmouse)) {
1607                 psmouse_err(psmouse, "Unable to query device.\n");
1608                 return -1;
1609         }
1610
1611         if (synaptics_set_mode(psmouse)) {
1612                 psmouse_err(psmouse, "Unable to initialize device.\n");
1613                 return -1;
1614         }
1615
1616         if (old_priv.identity != priv->identity ||
1617             old_priv.model_id != priv->model_id ||
1618             old_priv.capabilities != priv->capabilities ||
1619             old_priv.ext_cap != priv->ext_cap) {
1620                 psmouse_err(psmouse,
1621                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1622                             old_priv.identity, priv->identity,
1623                             old_priv.model_id, priv->model_id,
1624                             old_priv.capabilities, priv->capabilities,
1625                             old_priv.ext_cap, priv->ext_cap);
1626                 return -1;
1627         }
1628
1629         return 0;
1630 }
1631
1632 static bool impaired_toshiba_kbc;
1633
1634 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1635 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1636         {
1637                 /* Toshiba Satellite */
1638                 .matches = {
1639                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1640                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1641                 },
1642         },
1643         {
1644                 /* Toshiba Dynabook */
1645                 .matches = {
1646                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1647                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1648                 },
1649         },
1650         {
1651                 /* Toshiba Portege M300 */
1652                 .matches = {
1653                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1654                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1655                 },
1656
1657         },
1658         {
1659                 /* Toshiba Portege M300 */
1660                 .matches = {
1661                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1662                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1663                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1664                 },
1665
1666         },
1667 #endif
1668         { }
1669 };
1670
1671 static bool broken_olpc_ec;
1672
1673 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1674 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1675         {
1676                 /* OLPC XO-1 or XO-1.5 */
1677                 .matches = {
1678                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1679                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1680                 },
1681         },
1682 #endif
1683         { }
1684 };
1685
1686 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1687 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1688         {
1689                 /* Cr-48 Chromebook (Codename Mario) */
1690                 .matches = {
1691                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1692                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1693                 },
1694         },
1695 #endif
1696         { }
1697 };
1698
1699 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1700 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1701         {
1702                 .matches = {
1703                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1704                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1705                 },
1706         },
1707 #endif
1708         { }
1709 };
1710
1711 void __init synaptics_module_init(void)
1712 {
1713         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1714         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1715         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1716
1717         /*
1718          * Unfortunately ForcePad capability is not exported over PS/2,
1719          * so we have to resort to checking DMI.
1720          */
1721         is_forcepad = dmi_check_system(forcepad_dmi_table);
1722 }
1723
1724 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1725 {
1726         struct synaptics_data *priv;
1727         int err = -1;
1728
1729         /*
1730          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1731          * packet spew overloads the EC such that key presses on the keyboard
1732          * are missed.  Given that, don't even attempt to use Absolute mode.
1733          * Relative mode seems to work just fine.
1734          */
1735         if (absolute_mode && broken_olpc_ec) {
1736                 psmouse_info(psmouse,
1737                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1738                 return -ENODEV;
1739         }
1740
1741         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1742         if (!priv)
1743                 return -ENOMEM;
1744
1745         psmouse_reset(psmouse);
1746
1747         if (synaptics_query_hardware(psmouse)) {
1748                 psmouse_err(psmouse, "Unable to query device.\n");
1749                 goto init_fail;
1750         }
1751
1752         priv->absolute_mode = absolute_mode;
1753         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1754                 priv->disable_gesture = true;
1755
1756         if (synaptics_set_mode(psmouse)) {
1757                 psmouse_err(psmouse, "Unable to initialize device.\n");
1758                 goto init_fail;
1759         }
1760
1761         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1762
1763         psmouse_info(psmouse,
1764                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1765                      SYN_ID_MODEL(priv->identity),
1766                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1767                      priv->model_id,
1768                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1769                      priv->board_id, priv->firmware_id);
1770
1771         set_input_params(psmouse, priv);
1772
1773         /*
1774          * Encode touchpad model so that it can be used to set
1775          * input device->id.version and be visible to userspace.
1776          * Because version is __u16 we have to drop something.
1777          * Hardware info bits seem to be good candidates as they
1778          * are documented to be for Synaptics corp. internal use.
1779          */
1780         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1781                           (priv->model_id & 0x000000ff);
1782
1783         if (absolute_mode) {
1784                 psmouse->protocol_handler = synaptics_process_byte;
1785                 psmouse->pktsize = 6;
1786         } else {
1787                 /* Relative mode follows standard PS/2 mouse protocol */
1788                 psmouse->protocol_handler = psmouse_process_byte;
1789                 psmouse->pktsize = 3;
1790         }
1791
1792         psmouse->set_rate = synaptics_set_rate;
1793         psmouse->disconnect = synaptics_disconnect;
1794         psmouse->reconnect = synaptics_reconnect;
1795         psmouse->cleanup = synaptics_reset;
1796         /* Synaptics can usually stay in sync without extra help */
1797         psmouse->resync_time = 0;
1798
1799         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1800                 synaptics_pt_create(psmouse);
1801
1802         /*
1803          * Toshiba's KBC seems to have trouble handling data from
1804          * Synaptics at full rate.  Switch to a lower rate (roughly
1805          * the same rate as a standard PS/2 mouse).
1806          */
1807         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1808                 psmouse_info(psmouse,
1809                              "Toshiba %s detected, limiting rate to 40pps.\n",
1810                              dmi_get_system_info(DMI_PRODUCT_NAME));
1811                 psmouse->rate = 40;
1812         }
1813
1814         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1815                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1816                                          &psmouse_attr_disable_gesture.dattr);
1817                 if (err) {
1818                         psmouse_err(psmouse,
1819                                     "Failed to create disable_gesture attribute (%d)",
1820                                     err);
1821                         goto init_fail;
1822                 }
1823         }
1824
1825         return 0;
1826
1827  init_fail:
1828         kfree(priv);
1829         return err;
1830 }
1831
1832 int synaptics_init(struct psmouse *psmouse)
1833 {
1834         return __synaptics_init(psmouse, true);
1835 }
1836
1837 int synaptics_init_relative(struct psmouse *psmouse)
1838 {
1839         return __synaptics_init(psmouse, false);
1840 }
1841
1842 bool synaptics_supported(void)
1843 {
1844         return true;
1845 }
1846
1847 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1848
1849 void __init synaptics_module_init(void)
1850 {
1851 }
1852
1853 int synaptics_init(struct psmouse *psmouse)
1854 {
1855         return -ENOSYS;
1856 }
1857
1858 bool synaptics_supported(void)
1859 {
1860         return false;
1861 }
1862
1863 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */