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 #define ANY_BOARD_ID 0
 124 struct min_max_quirk {
 125         const char * const *pnp_ids;
 126         struct {
 127                 unsigned long int min, max;
 128         } board_id;
 129         int x_min, x_max, y_min, y_max;
 130 };
 131
 132 static const struct min_max_quirk min_max_pnpid_table[] = {
 133         {
 134                 (const char * const []){"LEN0033", NULL},
 135                 {ANY_BOARD_ID, ANY_BOARD_ID},
 136                 1024, 5052, 2258, 4832
 137         },
 138         {
 139                 (const char * const []){"LEN0042", NULL},
 140                 {ANY_BOARD_ID, ANY_BOARD_ID},
 141                 1232, 5710, 1156, 4696
 142         },
 143         {
 144                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 145                                         "LEN0039", "LEN2002", "LEN2004",
 146                                         NULL},
 147                 {ANY_BOARD_ID, 2961},
 148                 1024, 5112, 2024, 4832
 149         },
 150         {
 151                 (const char * const []){"LEN2001", NULL},
 152                 {ANY_BOARD_ID, ANY_BOARD_ID},
 153                 1024, 5022, 2508, 4832
 154         },
 155         {
 156                 (const char * const []){"LEN2006", NULL},
 157                 {ANY_BOARD_ID, ANY_BOARD_ID},
 158                 1264, 5675, 1171, 4688
 159         },
 160         { }
 161 };
 162
 163 /* This list has been kindly provided by Synaptics. */
 164 static const char * const topbuttonpad_pnp_ids[] = {
 165         "LEN0017",
 166         "LEN0018",
 167         "LEN0019",
 168         "LEN0023",
 169         "LEN002A",
 170         "LEN002B",
 171         "LEN002C",
 172         "LEN002D",
 173         "LEN002E",
 174         "LEN0033", /* Helix */
 175         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 176         "LEN0035", /* X240 */
 177         "LEN0036", /* T440 */
 178         "LEN0037", /* X1 Carbon 2nd */
 179         "LEN0038",
 180         "LEN0039", /* T440s */
 181         "LEN0041",
 182         "LEN0042", /* Yoga */
 183         "LEN0045",
 184         "LEN0046",
 185         "LEN0047",
 186         "LEN0048",
 187         "LEN0049",
 188         "LEN2000",
 189         "LEN2001", /* Edge E431 */
 190         "LEN2002", /* Edge E531 */
 191         "LEN2003",
 192         "LEN2004", /* L440 */
 193         "LEN2005",
 194         "LEN2006",
 195         "LEN2007",
 196         "LEN2008",
 197         "LEN2009",
 198         "LEN200A",
 199         "LEN200B",
 200         NULL
 201 };
 202
 203 /*****************************************************************************
 204  *      Synaptics communications functions
 205  ****************************************************************************/
 206
 207 /*
 208  * Synaptics touchpads report the y coordinate from bottom to top, which is
 209  * opposite from what userspace expects.
 210  * This function is used to invert y before reporting.
 211  */
 212 static int synaptics_invert_y(int y)
 213 {
 214         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 215 }
 216
 217 /*
 218  * Send a command to the synpatics touchpad by special commands
 219  */
 220 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 221 {
 222         if (psmouse_sliced_command(psmouse, c))
 223                 return -1;
 224         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 225                 return -1;
 226         return 0;
 227 }
 228
 229 /*
 230  * Read the model-id bytes from the touchpad
 231  * see also SYN_MODEL_* macros
 232  */
 233 static int synaptics_model_id(struct psmouse *psmouse)
 234 {
 235         struct synaptics_data *priv = psmouse->private;
 236         unsigned char mi[3];
 237
 238         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 239                 return -1;
 240         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 241         return 0;
 242 }
 243
 244 /*
 245  * Read the board id from the touchpad
 246  * The board id is encoded in the "QUERY MODES" response
 247  */
 248 static int synaptics_board_id(struct psmouse *psmouse)
 249 {
 250         struct synaptics_data *priv = psmouse->private;
 251         unsigned char bid[3];
 252
 253         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 254                 return -1;
 255         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 256         return 0;
 257 }
 258
 259 /*
 260  * Read the firmware id from the touchpad
 261  */
 262 static int synaptics_firmware_id(struct psmouse *psmouse)
 263 {
 264         struct synaptics_data *priv = psmouse->private;
 265         unsigned char fwid[3];
 266
 267         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 268                 return -1;
 269         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 270         return 0;
 271 }
 272
 273 /*
 274  * Read the capability-bits from the touchpad
 275  * see also the SYN_CAP_* macros
 276  */
 277 static int synaptics_capability(struct psmouse *psmouse)
 278 {
 279         struct synaptics_data *priv = psmouse->private;
 280         unsigned char cap[3];
 281
 282         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 283                 return -1;
 284         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 285         priv->ext_cap = priv->ext_cap_0c = 0;
 286
 287         /*
 288          * Older firmwares had submodel ID fixed to 0x47
 289          */
 290         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 291             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 292                 return -1;
 293         }
 294
 295         /*
 296          * Unless capExtended is set the rest of the flags should be ignored
 297          */
 298         if (!SYN_CAP_EXTENDED(priv->capabilities))
 299                 priv->capabilities = 0;
 300
 301         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 302                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 303                         psmouse_warn(psmouse,
 304                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 305                 } else {
 306                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 307
 308                         /*
 309                          * if nExtBtn is greater than 8 it should be considered
 310                          * invalid and treated as 0
 311                          */
 312                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 313                                 priv->ext_cap &= 0xff0fff;
 314                 }
 315         }
 316
 317         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 318                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 319                         psmouse_warn(psmouse,
 320                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 321                 } else {
 322                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 323                 }
 324         }
 325
 326         return 0;
 327 }
 328
 329 /*
 330  * Identify Touchpad
 331  * See also the SYN_ID_* macros
 332  */
 333 static int synaptics_identify(struct psmouse *psmouse)
 334 {
 335         struct synaptics_data *priv = psmouse->private;
 336         unsigned char id[3];
 337
 338         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 339                 return -1;
 340         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 341         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 342                 return 0;
 343         return -1;
 344 }
 345
 346 /*
 347  * Read touchpad resolution and maximum reported coordinates
 348  * Resolution is left zero if touchpad does not support the query
 349  */
 350
 351 static int synaptics_resolution(struct psmouse *psmouse)
 352 {
 353         struct synaptics_data *priv = psmouse->private;
 354         unsigned char resp[3];
 355
 356         if (SYN_ID_MAJOR(priv->identity) < 4)
 357                 return 0;
 358
 359         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 360                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 361                         priv->x_res = resp[0]; /* x resolution in units/mm */
 362                         priv->y_res = resp[2]; /* y resolution in units/mm */
 363                 }
 364         }
 365
 366         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 367             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 368                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 369                         psmouse_warn(psmouse,
 370                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 371                 } else {
 372                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 373                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 374                         psmouse_info(psmouse,
 375                                      "queried max coordinates: x [..%d], y [..%d]\n",
 376                                      priv->x_max, priv->y_max);
 377                 }
 378         }
 379
 380         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 381             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 382              /*
 383               * Firmware v8.1 does not report proper number of extended
 384               * capabilities, but has been proven to report correct min
 385               * coordinates.
 386               */
 387              SYN_ID_FULL(priv->identity) == 0x801)) {
 388                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 389                         psmouse_warn(psmouse,
 390                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 391                 } else {
 392                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 393                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 394                         psmouse_info(psmouse,
 395                                      "queried min coordinates: x [%d..], y [%d..]\n",
 396                                      priv->x_min, priv->y_min);
 397                 }
 398         }
 399
 400         return 0;
 401 }
 402
 403 /*
 404  * Apply quirk(s) if the hardware matches
 405  */
 406
 407 static void synaptics_apply_quirks(struct psmouse *psmouse)
 408 {
 409         struct synaptics_data *priv = psmouse->private;
 410         int i;
 411
 412         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 413                 if (!psmouse_matches_pnp_id(psmouse,
 414                                             min_max_pnpid_table[i].pnp_ids))
 415                         continue;
 416
 417                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 418                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 419                         continue;
 420
 421                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 422                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 423                         continue;
 424
 425                 priv->x_min = min_max_pnpid_table[i].x_min;
 426                 priv->x_max = min_max_pnpid_table[i].x_max;
 427                 priv->y_min = min_max_pnpid_table[i].y_min;
 428                 priv->y_max = min_max_pnpid_table[i].y_max;
 429                 psmouse_info(psmouse,
 430                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 431                              priv->x_min, priv->x_max,
 432                              priv->y_min, priv->y_max);
 433                 break;
 434         }
 435 }
 436
 437 static int synaptics_query_hardware(struct psmouse *psmouse)
 438 {
 439         if (synaptics_identify(psmouse))
 440                 return -1;
 441         if (synaptics_model_id(psmouse))
 442                 return -1;
 443         if (synaptics_firmware_id(psmouse))
 444                 return -1;
 445         if (synaptics_board_id(psmouse))
 446                 return -1;
 447         if (synaptics_capability(psmouse))
 448                 return -1;
 449         if (synaptics_resolution(psmouse))
 450                 return -1;
 451
 452         synaptics_apply_quirks(psmouse);
 453
 454         return 0;
 455 }
 456
 457 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 458 {
 459         static unsigned char param = 0xc8;
 460         struct synaptics_data *priv = psmouse->private;
 461
 462         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 463               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 464                 return 0;
 465
 466         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 467                 return -1;
 468
 469         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 470                 return -1;
 471
 472         /* Advanced gesture mode also sends multi finger data */
 473         priv->capabilities |= BIT(1);
 474
 475         return 0;
 476 }
 477
 478 static int synaptics_set_mode(struct psmouse *psmouse)
 479 {
 480         struct synaptics_data *priv = psmouse->private;
 481
 482         priv->mode = 0;
 483         if (priv->absolute_mode)
 484                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 485         if (priv->disable_gesture)
 486                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 487         if (psmouse->rate >= 80)
 488                 priv->mode |= SYN_BIT_HIGH_RATE;
 489         if (SYN_CAP_EXTENDED(priv->capabilities))
 490                 priv->mode |= SYN_BIT_W_MODE;
 491
 492         if (synaptics_mode_cmd(psmouse, priv->mode))
 493                 return -1;
 494
 495         if (priv->absolute_mode &&
 496             synaptics_set_advanced_gesture_mode(psmouse)) {
 497                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 498                 return -1;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 505 {
 506         struct synaptics_data *priv = psmouse->private;
 507
 508         if (rate >= 80) {
 509                 priv->mode |= SYN_BIT_HIGH_RATE;
 510                 psmouse->rate = 80;
 511         } else {
 512                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 513                 psmouse->rate = 40;
 514         }
 515
 516         synaptics_mode_cmd(psmouse, priv->mode);
 517 }
 518
 519 /*****************************************************************************
 520  *      Synaptics pass-through PS/2 port support
 521  ****************************************************************************/
 522 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 523 {
 524         struct psmouse *parent = serio_get_drvdata(serio->parent);
 525         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 526
 527         if (psmouse_sliced_command(parent, c))
 528                 return -1;
 529         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 530                 return -1;
 531         return 0;
 532 }
 533
 534 static int synaptics_pt_start(struct serio *serio)
 535 {
 536         struct psmouse *parent = serio_get_drvdata(serio->parent);
 537         struct synaptics_data *priv = parent->private;
 538
 539         serio_pause_rx(parent->ps2dev.serio);
 540         priv->pt_port = serio;
 541         serio_continue_rx(parent->ps2dev.serio);
 542
 543         return 0;
 544 }
 545
 546 static void synaptics_pt_stop(struct serio *serio)
 547 {
 548         struct psmouse *parent = serio_get_drvdata(serio->parent);
 549         struct synaptics_data *priv = parent->private;
 550
 551         serio_pause_rx(parent->ps2dev.serio);
 552         priv->pt_port = NULL;
 553         serio_continue_rx(parent->ps2dev.serio);
 554 }
 555
 556 static int synaptics_is_pt_packet(unsigned char *buf)
 557 {
 558         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 559 }
 560
 561 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 562 {
 563         struct psmouse *child = serio_get_drvdata(ptport);
 564
 565         if (child && child->state == PSMOUSE_ACTIVATED) {
 566                 serio_interrupt(ptport, packet[1], 0);
 567                 serio_interrupt(ptport, packet[4], 0);
 568                 serio_interrupt(ptport, packet[5], 0);
 569                 if (child->pktsize == 4)
 570                         serio_interrupt(ptport, packet[2], 0);
 571         } else
 572                 serio_interrupt(ptport, packet[1], 0);
 573 }
 574
 575 static void synaptics_pt_activate(struct psmouse *psmouse)
 576 {
 577         struct synaptics_data *priv = psmouse->private;
 578         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 579
 580         /* adjust the touchpad to child's choice of protocol */
 581         if (child) {
 582                 if (child->pktsize == 4)
 583                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 584                 else
 585                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 586
 587                 if (synaptics_mode_cmd(psmouse, priv->mode))
 588                         psmouse_warn(psmouse,
 589                                      "failed to switch guest protocol\n");
 590         }
 591 }
 592
 593 static void synaptics_pt_create(struct psmouse *psmouse)
 594 {
 595         struct serio *serio;
 596
 597         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 598         if (!serio) {
 599                 psmouse_err(psmouse,
 600                             "not enough memory for pass-through port\n");
 601                 return;
 602         }
 603
 604         serio->id.type = SERIO_PS_PSTHRU;
 605         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 606         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 607         serio->write = synaptics_pt_write;
 608         serio->start = synaptics_pt_start;
 609         serio->stop = synaptics_pt_stop;
 610         serio->parent = psmouse->ps2dev.serio;
 611
 612         psmouse->pt_activate = synaptics_pt_activate;
 613
 614         psmouse_info(psmouse, "serio: %s port at %s\n",
 615                      serio->name, psmouse->phys);
 616         serio_register_port(serio);
 617 }
 618
 619 /*****************************************************************************
 620  *      Functions to interpret the absolute mode packets
 621  ****************************************************************************/
 622
 623 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 624                                    int sgm, int agm)
 625 {
 626         state->count = count;
 627         state->sgm = sgm;
 628         state->agm = agm;
 629 }
 630
 631 static void synaptics_parse_agm(const unsigned char buf[],
 632                                 struct synaptics_data *priv,
 633                                 struct synaptics_hw_state *hw)
 634 {
 635         struct synaptics_hw_state *agm = &priv->agm;
 636         int agm_packet_type;
 637
 638         agm_packet_type = (buf[5] & 0x30) >> 4;
 639         switch (agm_packet_type) {
 640         case 1:
 641                 /* Gesture packet: (x, y, z) half resolution */
 642                 agm->w = hw->w;
 643                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 644                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 645                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 646                 break;
 647
 648         case 2:
 649                 /* AGM-CONTACT packet: (count, sgm, agm) */
 650                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 651                 break;
 652
 653         default:
 654                 break;
 655         }
 656
 657         /* Record that at least one AGM has been received since last SGM */
 658         priv->agm_pending = true;
 659 }
 660
 661 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 662                                         struct synaptics_data *priv,
 663                                         struct synaptics_hw_state *hw)
 664 {
 665         unsigned int ext_bits =
 666                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 667         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 668
 669         hw->ext_buttons = buf[4] & ext_mask;
 670         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 671 }
 672
 673 static bool is_forcepad;
 674
 675 static int synaptics_parse_hw_state(const unsigned char buf[],
 676                                     struct synaptics_data *priv,
 677                                     struct synaptics_hw_state *hw)
 678 {
 679         memset(hw, 0, sizeof(struct synaptics_hw_state));
 680
 681         if (SYN_MODEL_NEWABS(priv->model_id)) {
 682                 hw->w = (((buf[0] & 0x30) >> 2) |
 683                          ((buf[0] & 0x04) >> 1) |
 684                          ((buf[3] & 0x04) >> 2));
 685
 686                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 687                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 688                     hw->w == 2) {
 689                         synaptics_parse_agm(buf, priv, hw);
 690                         return 1;
 691                 }
 692
 693                 hw->x = (((buf[3] & 0x10) << 8) |
 694                          ((buf[1] & 0x0f) << 8) |
 695                          buf[4]);
 696                 hw->y = (((buf[3] & 0x20) << 7) |
 697                          ((buf[1] & 0xf0) << 4) |
 698                          buf[5]);
 699                 hw->z = buf[2];
 700
 701                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 702                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 703
 704                 if (is_forcepad) {
 705                         /*
 706                          * ForcePads, like Clickpads, use middle button
 707                          * bits to report primary button clicks.
 708                          * Unfortunately they report primary button not
 709                          * only when user presses on the pad above certain
 710                          * threshold, but also when there are more than one
 711                          * finger on the touchpad, which interferes with
 712                          * out multi-finger gestures.
 713                          */
 714                         if (hw->z == 0) {
 715                                 /* No contacts */
 716                                 priv->press = priv->report_press = false;
 717                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 718                                 /*
 719                                  * Single-finger touch with pressure above
 720                                  * the threshold. If pressure stays long
 721                                  * enough, we'll start reporting primary
 722                                  * button. We rely on the device continuing
 723                                  * sending data even if finger does not
 724                                  * move.
 725                                  */
 726                                 if  (!priv->press) {
 727                                         priv->press_start = jiffies;
 728                                         priv->press = true;
 729                                 } else if (time_after(jiffies,
 730                                                 priv->press_start +
 731                                                         msecs_to_jiffies(50))) {
 732                                         priv->report_press = true;
 733                                 }
 734                         } else {
 735                                 priv->press = false;
 736                         }
 737
 738                         hw->left = priv->report_press;
 739
 740                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 741                         /*
 742                          * Clickpad's button is transmitted as middle button,
 743                          * however, since it is primary button, we will report
 744                          * it as BTN_LEFT.
 745                          */
 746                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 747
 748                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 749                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 750                         if (hw->w == 2)
 751                                 hw->scroll = (signed char)(buf[1]);
 752                 }
 753
 754                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 755                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 756                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 757                 }
 758
 759                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 760                     ((buf[0] ^ buf[3]) & 0x02)) {
 761                         synaptics_parse_ext_buttons(buf, priv, hw);
 762                 }
 763         } else {
 764                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 765                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 766
 767                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 768                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 769
 770                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 771                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 772         }
 773
 774         /*
 775          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 776          * is used by some firmware to indicate a finger at the edge of
 777          * the touchpad whose precise position cannot be determined, so
 778          * convert these values to the maximum axis value.
 779          */
 780         if (hw->x > X_MAX_POSITIVE)
 781                 hw->x -= 1 << ABS_POS_BITS;
 782         else if (hw->x == X_MAX_POSITIVE)
 783                 hw->x = XMAX;
 784
 785         if (hw->y > Y_MAX_POSITIVE)
 786                 hw->y -= 1 << ABS_POS_BITS;
 787         else if (hw->y == Y_MAX_POSITIVE)
 788                 hw->y = YMAX;
 789
 790         return 0;
 791 }
 792
 793 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 794                                           bool active, int x, int y)
 795 {
 796         input_mt_slot(dev, slot);
 797         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 798         if (active) {
 799                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 800                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 801         }
 802 }
 803
 804 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 805                                           const struct synaptics_hw_state *a,
 806                                           const struct synaptics_hw_state *b,
 807                                           int num_fingers)
 808 {
 809         if (num_fingers >= 2) {
 810                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 811                                               min(a->y, b->y));
 812                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 813                                               max(a->y, b->y));
 814         } else if (num_fingers == 1) {
 815                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 816                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 817         } else {
 818                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 819                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 820         }
 821 }
 822
 823 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 824                                          const struct synaptics_hw_state *hw)
 825 {
 826         struct input_dev *dev = psmouse->dev;
 827         struct synaptics_data *priv = psmouse->private;
 828         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 829         int i;
 830
 831         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 832                 return;
 833
 834         /* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
 835         if (SYN_ID_FULL(priv->identity) == 0x801 &&
 836             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 837                 return;
 838
 839         for (i = 0; i < ext_bits; i++) {
 840                 input_report_key(dev, BTN_0 + 2 * i,
 841                         hw->ext_buttons & (1 << i));
 842                 input_report_key(dev, BTN_1 + 2 * i,
 843                         hw->ext_buttons & (1 << (i + ext_bits)));
 844         }
 845 }
 846
 847 static void synaptics_report_buttons(struct psmouse *psmouse,
 848                                      const struct synaptics_hw_state *hw)
 849 {
 850         struct input_dev *dev = psmouse->dev;
 851         struct synaptics_data *priv = psmouse->private;
 852
 853         input_report_key(dev, BTN_LEFT, hw->left);
 854         input_report_key(dev, BTN_RIGHT, hw->right);
 855
 856         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 857                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 858
 859         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 860                 input_report_key(dev, BTN_FORWARD, hw->up);
 861                 input_report_key(dev, BTN_BACK, hw->down);
 862         }
 863
 864         synaptics_report_ext_buttons(psmouse, hw);
 865 }
 866
 867 static void synaptics_report_slot(struct input_dev *dev, int slot,
 868                                   const struct synaptics_hw_state *hw)
 869 {
 870         input_mt_slot(dev, slot);
 871         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 872         if (!hw)
 873                 return;
 874
 875         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 876         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 877         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 878 }
 879
 880 static void synaptics_report_mt_data(struct psmouse *psmouse,
 881                                      struct synaptics_mt_state *mt_state,
 882                                      const struct synaptics_hw_state *sgm)
 883 {
 884         struct input_dev *dev = psmouse->dev;
 885         struct synaptics_data *priv = psmouse->private;
 886         struct synaptics_hw_state *agm = &priv->agm;
 887         struct synaptics_mt_state *old = &priv->mt_state;
 888
 889         switch (mt_state->count) {
 890         case 0:
 891                 synaptics_report_slot(dev, 0, NULL);
 892                 synaptics_report_slot(dev, 1, NULL);
 893                 break;
 894         case 1:
 895                 if (mt_state->sgm == -1) {
 896                         synaptics_report_slot(dev, 0, NULL);
 897                         synaptics_report_slot(dev, 1, NULL);
 898                 } else if (mt_state->sgm == 0) {
 899                         synaptics_report_slot(dev, 0, sgm);
 900                         synaptics_report_slot(dev, 1, NULL);
 901                 } else {
 902                         synaptics_report_slot(dev, 0, NULL);
 903                         synaptics_report_slot(dev, 1, sgm);
 904                 }
 905                 break;
 906         default:
 907                 /*
 908                  * If the finger slot contained in SGM is valid, and either
 909                  * hasn't changed, or is new, or the old SGM has now moved to
 910                  * AGM, then report SGM in MTB slot 0.
 911                  * Otherwise, empty MTB slot 0.
 912                  */
 913                 if (mt_state->sgm != -1 &&
 914                     (mt_state->sgm == old->sgm ||
 915                      old->sgm == -1 || mt_state->agm == old->sgm))
 916                         synaptics_report_slot(dev, 0, sgm);
 917                 else
 918                         synaptics_report_slot(dev, 0, NULL);
 919
 920                 /*
 921                  * If the finger slot contained in AGM is valid, and either
 922                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 923                  * Otherwise, empty MTB slot 1.
 924                  *
 925                  * However, in the case where the AGM is new, make sure that
 926                  * that it is either the same as the old SGM, or there was no
 927                  * SGM.
 928                  *
 929                  * Otherwise, if the SGM was just 1, and the new AGM is 2, then
 930                  * the new AGM will keep the old SGM's tracking ID, which can
 931                  * cause apparent drumroll.  This happens if in the following
 932                  * valid finger sequence:
 933                  *
 934                  *  Action                 SGM  AGM (MTB slot:Contact)
 935                  *  1. Touch contact 0    (0:0)
 936                  *  2. Touch contact 1    (0:0, 1:1)
 937                  *  3. Lift  contact 0    (1:1)
 938                  *  4. Touch contacts 2,3 (0:2, 1:3)
 939                  *
 940                  * In step 4, contact 3, in AGM must not be given the same
 941                  * tracking ID as contact 1 had in step 3.  To avoid this,
 942                  * the first agm with contact 3 is dropped and slot 1 is
 943                  * invalidated (tracking ID = -1).
 944                  */
 945                 if (mt_state->agm != -1 &&
 946                     (mt_state->agm == old->agm ||
 947                      (old->agm == -1 &&
 948                       (old->sgm == -1 || mt_state->agm == old->sgm))))
 949                         synaptics_report_slot(dev, 1, agm);
 950                 else
 951                         synaptics_report_slot(dev, 1, NULL);
 952                 break;
 953         }
 954
 955         /* Don't use active slot count to generate BTN_TOOL events. */
 956         input_mt_report_pointer_emulation(dev, false);
 957
 958         /* Send the number of fingers reported by touchpad itself. */
 959         input_mt_report_finger_count(dev, mt_state->count);
 960
 961         synaptics_report_buttons(psmouse, sgm);
 962
 963         input_sync(dev);
 964 }
 965
 966 /* Handle case where mt_state->count = 0 */
 967 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
 968                                       struct synaptics_mt_state *mt_state)
 969 {
 970         synaptics_mt_state_set(mt_state, 0, -1, -1);
 971         priv->mt_state_lost = false;
 972 }
 973
 974 /* Handle case where mt_state->count = 1 */
 975 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
 976                                       struct synaptics_mt_state *mt_state)
 977 {
 978         struct synaptics_hw_state *agm = &priv->agm;
 979         struct synaptics_mt_state *old = &priv->mt_state;
 980
 981         /*
 982          * If the last AGM was (0,0,0), and there is only one finger left,
 983          * then we absolutely know that SGM contains slot 0, and all other
 984          * fingers have been removed.
 985          */
 986         if (priv->agm_pending && agm->z == 0) {
 987                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 988                 priv->mt_state_lost = false;
 989                 return;
 990         }
 991
 992         switch (old->count) {
 993         case 0:
 994                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 995                 break;
 996         case 1:
 997                 /*
 998                  * If mt_state_lost, then the previous transition was 3->1,
 999                  * and SGM now contains either slot 0 or 1, but we don't know
1000                  * which.  So, we just assume that the SGM now contains slot 1.
1001                  *
1002                  * If pending AGM and either:
1003                  *   (a) the previous SGM slot contains slot 0, or
1004                  *   (b) there was no SGM slot
1005                  * then, the SGM now contains slot 1
1006                  *
1007                  * Case (a) happens with very rapid "drum roll" gestures, where
1008                  * slot 0 finger is lifted and a new slot 1 finger touches
1009                  * within one reporting interval.
1010                  *
1011                  * Case (b) happens if initially two or more fingers tap
1012                  * briefly, and all but one lift before the end of the first
1013                  * reporting interval.
1014                  *
1015                  * (In both these cases, slot 0 will becomes empty, so SGM
1016                  * contains slot 1 with the new finger)
1017                  *
1018                  * Else, if there was no previous SGM, it now contains slot 0.
1019                  *
1020                  * Otherwise, SGM still contains the same slot.
1021                  */
1022                 if (priv->mt_state_lost ||
1023                     (priv->agm_pending && old->sgm <= 0))
1024                         synaptics_mt_state_set(mt_state, 1, 1, -1);
1025                 else if (old->sgm == -1)
1026                         synaptics_mt_state_set(mt_state, 1, 0, -1);
1027                 break;
1028         case 2:
1029                 /*
1030                  * If mt_state_lost, we don't know which finger SGM contains.
1031                  *
1032                  * So, report 1 finger, but with both slots empty.
1033                  * We will use slot 1 on subsequent 1->1
1034                  */
1035                 if (priv->mt_state_lost) {
1036                         synaptics_mt_state_set(mt_state, 1, -1, -1);
1037                         break;
1038                 }
1039                 /*
1040                  * Since the last AGM was NOT (0,0,0), it was the finger in
1041                  * slot 0 that has been removed.
1042                  * So, SGM now contains previous AGM's slot, and AGM is now
1043                  * empty.
1044                  */
1045                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
1046                 break;
1047         case 3:
1048                 /*
1049                  * Since last AGM was not (0,0,0), we don't know which finger
1050                  * is left.
1051                  *
1052                  * So, report 1 finger, but with both slots empty.
1053                  * We will use slot 1 on subsequent 1->1
1054                  */
1055                 synaptics_mt_state_set(mt_state, 1, -1, -1);
1056                 priv->mt_state_lost = true;
1057                 break;
1058         case 4:
1059         case 5:
1060                 /* mt_state was updated by AGM-CONTACT packet */
1061                 break;
1062         }
1063 }
1064
1065 /* Handle case where mt_state->count = 2 */
1066 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1067                                       struct synaptics_mt_state *mt_state)
1068 {
1069         struct synaptics_mt_state *old = &priv->mt_state;
1070
1071         switch (old->count) {
1072         case 0:
1073                 synaptics_mt_state_set(mt_state, 2, 0, 1);
1074                 break;
1075         case 1:
1076                 /*
1077                  * If previous SGM contained slot 1 or higher, SGM now contains
1078                  * slot 0 (the newly touching finger) and AGM contains SGM's
1079                  * previous slot.
1080                  *
1081                  * Otherwise, SGM still contains slot 0 and AGM now contains
1082                  * slot 1.
1083                  */
1084                 if (old->sgm >= 1)
1085                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1086                 else
1087                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1088                 break;
1089         case 2:
1090                 /*
1091                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
1092                  * we don't know which.
1093                  * So, we just assume that the SGM contains slot 0 and AGM 1.
1094                  */
1095                 if (priv->mt_state_lost)
1096                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1097                 /*
1098                  * Otherwise, use the same mt_state, since it either hasn't
1099                  * changed, or was updated by a recently received AGM-CONTACT
1100                  * packet.
1101                  */
1102                 break;
1103         case 3:
1104                 /*
1105                  * 3->2 transitions have two unsolvable problems:
1106                  *  1) no indication is given which finger was removed
1107                  *  2) no way to tell if agm packet was for finger 3
1108                  *     before 3->2, or finger 2 after 3->2.
1109                  *
1110                  * So, report 2 fingers, but empty all slots.
1111                  * We will guess slots [0,1] on subsequent 2->2.
1112                  */
1113                 synaptics_mt_state_set(mt_state, 2, -1, -1);
1114                 priv->mt_state_lost = true;
1115                 break;
1116         case 4:
1117         case 5:
1118                 /* mt_state was updated by AGM-CONTACT packet */
1119                 break;
1120         }
1121 }
1122
1123 /* Handle case where mt_state->count = 3 */
1124 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1125                                       struct synaptics_mt_state *mt_state)
1126 {
1127         struct synaptics_mt_state *old = &priv->mt_state;
1128
1129         switch (old->count) {
1130         case 0:
1131                 synaptics_mt_state_set(mt_state, 3, 0, 2);
1132                 break;
1133         case 1:
1134                 /*
1135                  * If previous SGM contained slot 2 or higher, SGM now contains
1136                  * slot 0 (one of the newly touching fingers) and AGM contains
1137                  * SGM's previous slot.
1138                  *
1139                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1140                  */
1141                 if (old->sgm >= 2)
1142                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1143                 else
1144                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1145                 break;
1146         case 2:
1147                 /*
1148                  * If the AGM previously contained slot 3 or higher, then the
1149                  * newly touching finger is in the lowest available slot.
1150                  *
1151                  * If SGM was previously 1 or higher, then the new SGM is
1152                  * now slot 0 (with a new finger), otherwise, the new finger
1153                  * is now in a hidden slot between 0 and AGM's slot.
1154                  *
1155                  * In all such cases, the SGM now contains slot 0, and the AGM
1156                  * continues to contain the same slot as before.
1157                  */
1158                 if (old->agm >= 3) {
1159                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1160                         break;
1161                 }
1162
1163                 /*
1164                  * After some 3->1 and all 3->2 transitions, we lose track
1165                  * of which slot is reported by SGM and AGM.
1166                  *
1167                  * For 2->3 in this state, report 3 fingers, but empty all
1168                  * slots, and we will guess (0,2) on a subsequent 0->3.
1169                  *
1170                  * To userspace, the resulting transition will look like:
1171                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1172                  */
1173                 if (priv->mt_state_lost) {
1174                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1175                         break;
1176                 }
1177
1178                 /*
1179                  * If the (SGM,AGM) really previously contained slots (0, 1),
1180                  * then we cannot know what slot was just reported by the AGM,
1181                  * because the 2->3 transition can occur either before or after
1182                  * the AGM packet. Thus, this most recent AGM could contain
1183                  * either the same old slot 1 or the new slot 2.
1184                  * Subsequent AGMs will be reporting slot 2.
1185                  *
1186                  * To userspace, the resulting transition will look like:
1187                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1188                  */
1189                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1190                 break;
1191         case 3:
1192                 /*
1193                  * If, for whatever reason, the previous agm was invalid,
1194                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1195                  */
1196                 if (old->agm <= 2)
1197                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1198                 /*
1199                  * mt_state either hasn't changed, or was updated by a recently
1200                  * received AGM-CONTACT packet.
1201                  */
1202                 break;
1203
1204         case 4:
1205         case 5:
1206                 /* mt_state was updated by AGM-CONTACT packet */
1207                 break;
1208         }
1209 }
1210
1211 /* Handle case where mt_state->count = 4, or = 5 */
1212 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1213                                        struct synaptics_mt_state *mt_state)
1214 {
1215         /* mt_state was updated correctly by AGM-CONTACT packet */
1216         priv->mt_state_lost = false;
1217 }
1218
1219 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1220                                            struct synaptics_hw_state *sgm)
1221 {
1222         struct synaptics_data *priv = psmouse->private;
1223         struct synaptics_hw_state *agm = &priv->agm;
1224         struct synaptics_mt_state mt_state;
1225
1226         /* Initialize using current mt_state (as updated by last agm) */
1227         mt_state = agm->mt_state;
1228
1229         /*
1230          * Update mt_state using the new finger count and current mt_state.
1231          */
1232         if (sgm->z == 0)
1233                 synaptics_image_sensor_0f(priv, &mt_state);
1234         else if (sgm->w >= 4)
1235                 synaptics_image_sensor_1f(priv, &mt_state);
1236         else if (sgm->w == 0)
1237                 synaptics_image_sensor_2f(priv, &mt_state);
1238         else if (sgm->w == 1 && mt_state.count <= 3)
1239                 synaptics_image_sensor_3f(priv, &mt_state);
1240         else
1241                 synaptics_image_sensor_45f(priv, &mt_state);
1242
1243         /* Send resulting input events to user space */
1244         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1245
1246         /* Store updated mt_state */
1247         priv->mt_state = agm->mt_state = mt_state;
1248         priv->agm_pending = false;
1249 }
1250
1251 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1252                                              struct synaptics_hw_state *sgm,
1253                                              int num_fingers)
1254 {
1255         struct input_dev *dev = psmouse->dev;
1256         struct synaptics_data *priv = psmouse->private;
1257         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1258         struct input_mt_pos pos[2];
1259         int slot[2], nsemi, i;
1260
1261         nsemi = clamp_val(num_fingers, 0, 2);
1262
1263         for (i = 0; i < nsemi; i++) {
1264                 pos[i].x = hw[i]->x;
1265                 pos[i].y = synaptics_invert_y(hw[i]->y);
1266         }
1267
1268         input_mt_assign_slots(dev, slot, pos, nsemi);
1269
1270         for (i = 0; i < nsemi; i++) {
1271                 input_mt_slot(dev, slot[i]);
1272                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1273                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1274                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1275                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1276         }
1277
1278         input_mt_drop_unused(dev);
1279         input_mt_report_pointer_emulation(dev, false);
1280         input_mt_report_finger_count(dev, num_fingers);
1281
1282         synaptics_report_buttons(psmouse, sgm);
1283
1284         input_sync(dev);
1285 }
1286
1287 /*
1288  *  called for each full received packet from the touchpad
1289  */
1290 static void synaptics_process_packet(struct psmouse *psmouse)
1291 {
1292         struct input_dev *dev = psmouse->dev;
1293         struct synaptics_data *priv = psmouse->private;
1294         struct synaptics_hw_state hw;
1295         int num_fingers;
1296         int finger_width;
1297
1298         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1299                 return;
1300
1301         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1302                 synaptics_image_sensor_process(psmouse, &hw);
1303                 return;
1304         }
1305
1306         if (hw.scroll) {
1307                 priv->scroll += hw.scroll;
1308
1309                 while (priv->scroll >= 4) {
1310                         input_report_key(dev, BTN_BACK, !hw.down);
1311                         input_sync(dev);
1312                         input_report_key(dev, BTN_BACK, hw.down);
1313                         input_sync(dev);
1314                         priv->scroll -= 4;
1315                 }
1316                 while (priv->scroll <= -4) {
1317                         input_report_key(dev, BTN_FORWARD, !hw.up);
1318                         input_sync(dev);
1319                         input_report_key(dev, BTN_FORWARD, hw.up);
1320                         input_sync(dev);
1321                         priv->scroll += 4;
1322                 }
1323                 return;
1324         }
1325
1326         if (hw.z > 0 && hw.x > 1) {
1327                 num_fingers = 1;
1328                 finger_width = 5;
1329                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1330                         switch (hw.w) {
1331                         case 0 ... 1:
1332                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1333                                         num_fingers = hw.w + 2;
1334                                 break;
1335                         case 2:
1336                                 if (SYN_MODEL_PEN(priv->model_id))
1337                                         ;   /* Nothing, treat a pen as a single finger */
1338                                 break;
1339                         case 4 ... 15:
1340                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1341                                         finger_width = hw.w;
1342                                 break;
1343                         }
1344                 }
1345         } else {
1346                 num_fingers = 0;
1347                 finger_width = 0;
1348         }
1349
1350         if (cr48_profile_sensor) {
1351                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1352                 return;
1353         }
1354
1355         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1356                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1357                                               num_fingers);
1358
1359         /* Post events
1360          * BTN_TOUCH has to be first as mousedev relies on it when doing
1361          * absolute -> relative conversion
1362          */
1363         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1364         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1365
1366         if (num_fingers > 0) {
1367                 input_report_abs(dev, ABS_X, hw.x);
1368                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1369         }
1370         input_report_abs(dev, ABS_PRESSURE, hw.z);
1371
1372         if (SYN_CAP_PALMDETECT(priv->capabilities))
1373                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1374
1375         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1376         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1377                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1378                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1379         }
1380
1381         synaptics_report_buttons(psmouse, &hw);
1382
1383         input_sync(dev);
1384 }
1385
1386 static int synaptics_validate_byte(struct psmouse *psmouse,
1387                                    int idx, unsigned char pkt_type)
1388 {
1389         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1390         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1391         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1392         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1393         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1394         const char *packet = psmouse->packet;
1395
1396         if (idx < 0 || idx > 4)
1397                 return 0;
1398
1399         switch (pkt_type) {
1400
1401         case SYN_NEWABS:
1402         case SYN_NEWABS_RELAXED:
1403                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1404
1405         case SYN_NEWABS_STRICT:
1406                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1407
1408         case SYN_OLDABS:
1409                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1410
1411         default:
1412                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1413                 return 0;
1414         }
1415 }
1416
1417 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1418 {
1419         int i;
1420
1421         for (i = 0; i < 5; i++)
1422                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1423                         psmouse_info(psmouse, "using relaxed packet validation\n");
1424                         return SYN_NEWABS_RELAXED;
1425                 }
1426
1427         return SYN_NEWABS_STRICT;
1428 }
1429
1430 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1431 {
1432         struct synaptics_data *priv = psmouse->private;
1433
1434         if (psmouse->pktcnt >= 6) { /* Full packet received */
1435                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1436                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1437
1438                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1439                     synaptics_is_pt_packet(psmouse->packet)) {
1440                         if (priv->pt_port)
1441                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1442                 } else
1443                         synaptics_process_packet(psmouse);
1444
1445                 return PSMOUSE_FULL_PACKET;
1446         }
1447
1448         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1449                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1450 }
1451
1452 /*****************************************************************************
1453  *      Driver initialization/cleanup functions
1454  ****************************************************************************/
1455 static void set_abs_position_params(struct input_dev *dev,
1456                                     struct synaptics_data *priv, int x_code,
1457                                     int y_code)
1458 {
1459         int x_min = priv->x_min ?: XMIN_NOMINAL;
1460         int x_max = priv->x_max ?: XMAX_NOMINAL;
1461         int y_min = priv->y_min ?: YMIN_NOMINAL;
1462         int y_max = priv->y_max ?: YMAX_NOMINAL;
1463         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1464                         SYN_REDUCED_FILTER_FUZZ : 0;
1465
1466         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1467         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1468         input_abs_set_res(dev, x_code, priv->x_res);
1469         input_abs_set_res(dev, y_code, priv->y_res);
1470 }
1471
1472 static void set_input_params(struct psmouse *psmouse,
1473                              struct synaptics_data *priv)
1474 {
1475         struct input_dev *dev = psmouse->dev;
1476         int i;
1477
1478         /* Things that apply to both modes */
1479         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1480         __set_bit(EV_KEY, dev->evbit);
1481         __set_bit(BTN_LEFT, dev->keybit);
1482         __set_bit(BTN_RIGHT, dev->keybit);
1483
1484         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1485                 __set_bit(BTN_MIDDLE, dev->keybit);
1486
1487         if (!priv->absolute_mode) {
1488                 /* Relative mode */
1489                 __set_bit(EV_REL, dev->evbit);
1490                 __set_bit(REL_X, dev->relbit);
1491                 __set_bit(REL_Y, dev->relbit);
1492                 return;
1493         }
1494
1495         /* Absolute mode */
1496         __set_bit(EV_ABS, dev->evbit);
1497         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1498         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1499
1500         if (cr48_profile_sensor)
1501                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1502
1503         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1504                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1505                                         ABS_MT_POSITION_Y);
1506                 /* Image sensors can report per-contact pressure */
1507                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1508                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1509
1510                 /* Image sensors can signal 4 and 5 finger clicks */
1511                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1512                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1513         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1514                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1515                                         ABS_MT_POSITION_Y);
1516                 /*
1517                  * Profile sensor in CR-48 tracks contacts reasonably well,
1518                  * other non-image sensors with AGM use semi-mt.
1519                  */
1520                 input_mt_init_slots(dev, 2,
1521                                     INPUT_MT_POINTER |
1522                                     (cr48_profile_sensor ?
1523                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1524         }
1525
1526         if (SYN_CAP_PALMDETECT(priv->capabilities))
1527                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1528
1529         __set_bit(BTN_TOUCH, dev->keybit);
1530         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1531
1532         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1533                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1534                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1535         }
1536
1537         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1538             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1539                 __set_bit(BTN_FORWARD, dev->keybit);
1540                 __set_bit(BTN_BACK, dev->keybit);
1541         }
1542
1543         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1544                 __set_bit(BTN_0 + i, dev->keybit);
1545
1546         __clear_bit(EV_REL, dev->evbit);
1547         __clear_bit(REL_X, dev->relbit);
1548         __clear_bit(REL_Y, dev->relbit);
1549
1550         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1551                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1552                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1553                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1554                 /* Clickpads report only left button */
1555                 __clear_bit(BTN_RIGHT, dev->keybit);
1556                 __clear_bit(BTN_MIDDLE, dev->keybit);
1557         }
1558 }
1559
1560 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1561                                               void *data, char *buf)
1562 {
1563         struct synaptics_data *priv = psmouse->private;
1564
1565         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1566 }
1567
1568 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1569                                              void *data, const char *buf,
1570                                              size_t len)
1571 {
1572         struct synaptics_data *priv = psmouse->private;
1573         unsigned int value;
1574         int err;
1575
1576         err = kstrtouint(buf, 10, &value);
1577         if (err)
1578                 return err;
1579
1580         if (value > 1)
1581                 return -EINVAL;
1582
1583         if (value == priv->disable_gesture)
1584                 return len;
1585
1586         priv->disable_gesture = value;
1587         if (value)
1588                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1589         else
1590                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1591
1592         if (synaptics_mode_cmd(psmouse, priv->mode))
1593                 return -EIO;
1594
1595         return len;
1596 }
1597
1598 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1599                     synaptics_show_disable_gesture,
1600                     synaptics_set_disable_gesture);
1601
1602 static void synaptics_disconnect(struct psmouse *psmouse)
1603 {
1604         struct synaptics_data *priv = psmouse->private;
1605
1606         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1607                 device_remove_file(&psmouse->ps2dev.serio->dev,
1608                                    &psmouse_attr_disable_gesture.dattr);
1609
1610         synaptics_reset(psmouse);
1611         kfree(priv);
1612         psmouse->private = NULL;
1613 }
1614
1615 static int synaptics_reconnect(struct psmouse *psmouse)
1616 {
1617         struct synaptics_data *priv = psmouse->private;
1618         struct synaptics_data old_priv = *priv;
1619         unsigned char param[2];
1620         int retry = 0;
1621         int error;
1622
1623         do {
1624                 psmouse_reset(psmouse);
1625                 if (retry) {
1626                         /*
1627                          * On some boxes, right after resuming, the touchpad
1628                          * needs some time to finish initializing (I assume
1629                          * it needs time to calibrate) and start responding
1630                          * to Synaptics-specific queries, so let's wait a
1631                          * bit.
1632                          */
1633                         ssleep(1);
1634                 }
1635                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1636                 error = synaptics_detect(psmouse, 0);
1637         } while (error && ++retry < 3);
1638
1639         if (error)
1640                 return -1;
1641
1642         if (retry > 1)
1643                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1644
1645         if (synaptics_query_hardware(psmouse)) {
1646                 psmouse_err(psmouse, "Unable to query device.\n");
1647                 return -1;
1648         }
1649
1650         if (synaptics_set_mode(psmouse)) {
1651                 psmouse_err(psmouse, "Unable to initialize device.\n");
1652                 return -1;
1653         }
1654
1655         if (old_priv.identity != priv->identity ||
1656             old_priv.model_id != priv->model_id ||
1657             old_priv.capabilities != priv->capabilities ||
1658             old_priv.ext_cap != priv->ext_cap) {
1659                 psmouse_err(psmouse,
1660                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1661                             old_priv.identity, priv->identity,
1662                             old_priv.model_id, priv->model_id,
1663                             old_priv.capabilities, priv->capabilities,
1664                             old_priv.ext_cap, priv->ext_cap);
1665                 return -1;
1666         }
1667
1668         return 0;
1669 }
1670
1671 static bool impaired_toshiba_kbc;
1672
1673 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1674 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1675         {
1676                 /* Toshiba Satellite */
1677                 .matches = {
1678                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1679                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1680                 },
1681         },
1682         {
1683                 /* Toshiba Dynabook */
1684                 .matches = {
1685                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1686                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1687                 },
1688         },
1689         {
1690                 /* Toshiba Portege M300 */
1691                 .matches = {
1692                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1693                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1694                 },
1695
1696         },
1697         {
1698                 /* Toshiba Portege M300 */
1699                 .matches = {
1700                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1701                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1702                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1703                 },
1704
1705         },
1706 #endif
1707         { }
1708 };
1709
1710 static bool broken_olpc_ec;
1711
1712 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1713 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1714         {
1715                 /* OLPC XO-1 or XO-1.5 */
1716                 .matches = {
1717                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1718                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1719                 },
1720         },
1721 #endif
1722         { }
1723 };
1724
1725 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1726 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1727         {
1728                 /* Cr-48 Chromebook (Codename Mario) */
1729                 .matches = {
1730                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1731                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1732                 },
1733         },
1734 #endif
1735         { }
1736 };
1737
1738 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1739 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1740         {
1741                 .matches = {
1742                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1743                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1744                 },
1745         },
1746 #endif
1747         { }
1748 };
1749
1750 void __init synaptics_module_init(void)
1751 {
1752         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1753         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1754         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1755
1756         /*
1757          * Unfortunately ForcePad capability is not exported over PS/2,
1758          * so we have to resort to checking DMI.
1759          */
1760         is_forcepad = dmi_check_system(forcepad_dmi_table);
1761 }
1762
1763 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1764 {
1765         struct synaptics_data *priv;
1766         int err = -1;
1767
1768         /*
1769          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1770          * packet spew overloads the EC such that key presses on the keyboard
1771          * are missed.  Given that, don't even attempt to use Absolute mode.
1772          * Relative mode seems to work just fine.
1773          */
1774         if (absolute_mode && broken_olpc_ec) {
1775                 psmouse_info(psmouse,
1776                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1777                 return -ENODEV;
1778         }
1779
1780         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1781         if (!priv)
1782                 return -ENOMEM;
1783
1784         psmouse_reset(psmouse);
1785
1786         if (synaptics_query_hardware(psmouse)) {
1787                 psmouse_err(psmouse, "Unable to query device.\n");
1788                 goto init_fail;
1789         }
1790
1791         priv->absolute_mode = absolute_mode;
1792         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1793                 priv->disable_gesture = true;
1794
1795         if (synaptics_set_mode(psmouse)) {
1796                 psmouse_err(psmouse, "Unable to initialize device.\n");
1797                 goto init_fail;
1798         }
1799
1800         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1801
1802         psmouse_info(psmouse,
1803                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1804                      SYN_ID_MODEL(priv->identity),
1805                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1806                      priv->model_id,
1807                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1808                      priv->board_id, priv->firmware_id);
1809
1810         set_input_params(psmouse, priv);
1811
1812         /*
1813          * Encode touchpad model so that it can be used to set
1814          * input device->id.version and be visible to userspace.
1815          * Because version is __u16 we have to drop something.
1816          * Hardware info bits seem to be good candidates as they
1817          * are documented to be for Synaptics corp. internal use.
1818          */
1819         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1820                           (priv->model_id & 0x000000ff);
1821
1822         if (absolute_mode) {
1823                 psmouse->protocol_handler = synaptics_process_byte;
1824                 psmouse->pktsize = 6;
1825         } else {
1826                 /* Relative mode follows standard PS/2 mouse protocol */
1827                 psmouse->protocol_handler = psmouse_process_byte;
1828                 psmouse->pktsize = 3;
1829         }
1830
1831         psmouse->set_rate = synaptics_set_rate;
1832         psmouse->disconnect = synaptics_disconnect;
1833         psmouse->reconnect = synaptics_reconnect;
1834         psmouse->cleanup = synaptics_reset;
1835         /* Synaptics can usually stay in sync without extra help */
1836         psmouse->resync_time = 0;
1837
1838         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1839                 synaptics_pt_create(psmouse);
1840
1841         /*
1842          * Toshiba's KBC seems to have trouble handling data from
1843          * Synaptics at full rate.  Switch to a lower rate (roughly
1844          * the same rate as a standard PS/2 mouse).
1845          */
1846         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1847                 psmouse_info(psmouse,
1848                              "Toshiba %s detected, limiting rate to 40pps.\n",
1849                              dmi_get_system_info(DMI_PRODUCT_NAME));
1850                 psmouse->rate = 40;
1851         }
1852
1853         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1854                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1855                                          &psmouse_attr_disable_gesture.dattr);
1856                 if (err) {
1857                         psmouse_err(psmouse,
1858                                     "Failed to create disable_gesture attribute (%d)",
1859                                     err);
1860                         goto init_fail;
1861                 }
1862         }
1863
1864         return 0;
1865
1866  init_fail:
1867         kfree(priv);
1868         return err;
1869 }
1870
1871 int synaptics_init(struct psmouse *psmouse)
1872 {
1873         return __synaptics_init(psmouse, true);
1874 }
1875
1876 int synaptics_init_relative(struct psmouse *psmouse)
1877 {
1878         return __synaptics_init(psmouse, false);
1879 }
1880
1881 bool synaptics_supported(void)
1882 {
1883         return true;
1884 }
1885
1886 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1887
1888 void __init synaptics_module_init(void)
1889 {
1890 }
1891
1892 int synaptics_init(struct psmouse *psmouse)
1893 {
1894         return -ENOSYS;
1895 }
1896
1897 bool synaptics_supported(void)
1898 {
1899         return false;
1900 }
1901
1902 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */