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