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