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