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         "LEN0049",
 187         "LEN2000",
 188         "LEN2001", /* Edge E431 */
 189         "LEN2002", /* Edge E531 */
 190         "LEN2003",
 191         "LEN2004", /* L440 */
 192         "LEN2005",
 193         "LEN2006",
 194         "LEN2007",
 195         "LEN2008",
 196         "LEN2009",
 197         "LEN200A",
 198         "LEN200B",
 199         NULL
 200 };
 201
 202 /*****************************************************************************
 203  *      Synaptics communications functions
 204  ****************************************************************************/
 205
 206 /*
 207  * Synaptics touchpads report the y coordinate from bottom to top, which is
 208  * opposite from what userspace expects.
 209  * This function is used to invert y before reporting.
 210  */
 211 static int synaptics_invert_y(int y)
 212 {
 213         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 214 }
 215
 216 /*
 217  * Send a command to the synpatics touchpad by special commands
 218  */
 219 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 220 {
 221         if (psmouse_sliced_command(psmouse, c))
 222                 return -1;
 223         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 224                 return -1;
 225         return 0;
 226 }
 227
 228 /*
 229  * Read the model-id bytes from the touchpad
 230  * see also SYN_MODEL_* macros
 231  */
 232 static int synaptics_model_id(struct psmouse *psmouse)
 233 {
 234         struct synaptics_data *priv = psmouse->private;
 235         unsigned char mi[3];
 236
 237         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 238                 return -1;
 239         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 240         return 0;
 241 }
 242
 243 static int synaptics_more_extended_queries(struct psmouse *psmouse)
 244 {
 245         struct synaptics_data *priv = psmouse->private;
 246         unsigned char buf[3];
 247
 248         if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
 249                 return -1;
 250
 251         priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];
 252
 253         return 0;
 254 }
 255
 256 /*
 257  * Read the board id and the "More Extended Queries" from the touchpad
 258  * The board id is encoded in the "QUERY MODES" response
 259  */
 260 static int synaptics_query_modes(struct psmouse *psmouse)
 261 {
 262         struct synaptics_data *priv = psmouse->private;
 263         unsigned char bid[3];
 264
 265         /* firmwares prior 7.5 have no board_id encoded */
 266         if (SYN_ID_FULL(priv->identity) < 0x705)
 267                 return 0;
 268
 269         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 270                 return -1;
 271         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 272
 273         if (SYN_MEXT_CAP_BIT(bid[0]))
 274                 return synaptics_more_extended_queries(psmouse);
 275
 276         return 0;
 277 }
 278
 279 /*
 280  * Read the firmware id from the touchpad
 281  */
 282 static int synaptics_firmware_id(struct psmouse *psmouse)
 283 {
 284         struct synaptics_data *priv = psmouse->private;
 285         unsigned char fwid[3];
 286
 287         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 288                 return -1;
 289         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 290         return 0;
 291 }
 292
 293 /*
 294  * Read the capability-bits from the touchpad
 295  * see also the SYN_CAP_* macros
 296  */
 297 static int synaptics_capability(struct psmouse *psmouse)
 298 {
 299         struct synaptics_data *priv = psmouse->private;
 300         unsigned char cap[3];
 301
 302         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 303                 return -1;
 304         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 305         priv->ext_cap = priv->ext_cap_0c = 0;
 306
 307         /*
 308          * Older firmwares had submodel ID fixed to 0x47
 309          */
 310         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 311             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 312                 return -1;
 313         }
 314
 315         /*
 316          * Unless capExtended is set the rest of the flags should be ignored
 317          */
 318         if (!SYN_CAP_EXTENDED(priv->capabilities))
 319                 priv->capabilities = 0;
 320
 321         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 322                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 323                         psmouse_warn(psmouse,
 324                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 325                 } else {
 326                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 327
 328                         /*
 329                          * if nExtBtn is greater than 8 it should be considered
 330                          * invalid and treated as 0
 331                          */
 332                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 333                                 priv->ext_cap &= 0xff0fff;
 334                 }
 335         }
 336
 337         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 338                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 339                         psmouse_warn(psmouse,
 340                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 341                 } else {
 342                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 343                 }
 344         }
 345
 346         return 0;
 347 }
 348
 349 /*
 350  * Identify Touchpad
 351  * See also the SYN_ID_* macros
 352  */
 353 static int synaptics_identify(struct psmouse *psmouse)
 354 {
 355         struct synaptics_data *priv = psmouse->private;
 356         unsigned char id[3];
 357
 358         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 359                 return -1;
 360         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 361         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 362                 return 0;
 363         return -1;
 364 }
 365
 366 /*
 367  * Read touchpad resolution and maximum reported coordinates
 368  * Resolution is left zero if touchpad does not support the query
 369  */
 370
 371 static int synaptics_resolution(struct psmouse *psmouse)
 372 {
 373         struct synaptics_data *priv = psmouse->private;
 374         unsigned char resp[3];
 375
 376         if (SYN_ID_MAJOR(priv->identity) < 4)
 377                 return 0;
 378
 379         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 380                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 381                         priv->x_res = resp[0]; /* x resolution in units/mm */
 382                         priv->y_res = resp[2]; /* y resolution in units/mm */
 383                 }
 384         }
 385
 386         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 387             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 388                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 389                         psmouse_warn(psmouse,
 390                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 391                 } else {
 392                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 393                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 394                         psmouse_info(psmouse,
 395                                      "queried max coordinates: x [..%d], y [..%d]\n",
 396                                      priv->x_max, priv->y_max);
 397                 }
 398         }
 399
 400         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 401             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 402              /*
 403               * Firmware v8.1 does not report proper number of extended
 404               * capabilities, but has been proven to report correct min
 405               * coordinates.
 406               */
 407              SYN_ID_FULL(priv->identity) == 0x801)) {
 408                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 409                         psmouse_warn(psmouse,
 410                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 411                 } else {
 412                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 413                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 414                         psmouse_info(psmouse,
 415                                      "queried min coordinates: x [%d..], y [%d..]\n",
 416                                      priv->x_min, priv->y_min);
 417                 }
 418         }
 419
 420         return 0;
 421 }
 422
 423 /*
 424  * Apply quirk(s) if the hardware matches
 425  */
 426
 427 static void synaptics_apply_quirks(struct psmouse *psmouse)
 428 {
 429         struct synaptics_data *priv = psmouse->private;
 430         int i;
 431
 432         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 433                 if (!psmouse_matches_pnp_id(psmouse,
 434                                             min_max_pnpid_table[i].pnp_ids))
 435                         continue;
 436
 437                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 438                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 439                         continue;
 440
 441                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 442                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 443                         continue;
 444
 445                 priv->x_min = min_max_pnpid_table[i].x_min;
 446                 priv->x_max = min_max_pnpid_table[i].x_max;
 447                 priv->y_min = min_max_pnpid_table[i].y_min;
 448                 priv->y_max = min_max_pnpid_table[i].y_max;
 449                 psmouse_info(psmouse,
 450                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 451                              priv->x_min, priv->x_max,
 452                              priv->y_min, priv->y_max);
 453                 break;
 454         }
 455 }
 456
 457 static int synaptics_query_hardware(struct psmouse *psmouse)
 458 {
 459         if (synaptics_identify(psmouse))
 460                 return -1;
 461         if (synaptics_model_id(psmouse))
 462                 return -1;
 463         if (synaptics_firmware_id(psmouse))
 464                 return -1;
 465         if (synaptics_query_modes(psmouse))
 466                 return -1;
 467         if (synaptics_capability(psmouse))
 468                 return -1;
 469         if (synaptics_resolution(psmouse))
 470                 return -1;
 471
 472         synaptics_apply_quirks(psmouse);
 473
 474         return 0;
 475 }
 476
 477 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 478 {
 479         static unsigned char param = 0xc8;
 480         struct synaptics_data *priv = psmouse->private;
 481
 482         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 483               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 484                 return 0;
 485
 486         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 487                 return -1;
 488
 489         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 490                 return -1;
 491
 492         /* Advanced gesture mode also sends multi finger data */
 493         priv->capabilities |= BIT(1);
 494
 495         return 0;
 496 }
 497
 498 static int synaptics_set_mode(struct psmouse *psmouse)
 499 {
 500         struct synaptics_data *priv = psmouse->private;
 501
 502         priv->mode = 0;
 503         if (priv->absolute_mode)
 504                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 505         if (priv->disable_gesture)
 506                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 507         if (psmouse->rate >= 80)
 508                 priv->mode |= SYN_BIT_HIGH_RATE;
 509         if (SYN_CAP_EXTENDED(priv->capabilities))
 510                 priv->mode |= SYN_BIT_W_MODE;
 511
 512         if (synaptics_mode_cmd(psmouse, priv->mode))
 513                 return -1;
 514
 515         if (priv->absolute_mode &&
 516             synaptics_set_advanced_gesture_mode(psmouse)) {
 517                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 518                 return -1;
 519         }
 520
 521         return 0;
 522 }
 523
 524 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 525 {
 526         struct synaptics_data *priv = psmouse->private;
 527
 528         if (rate >= 80) {
 529                 priv->mode |= SYN_BIT_HIGH_RATE;
 530                 psmouse->rate = 80;
 531         } else {
 532                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 533                 psmouse->rate = 40;
 534         }
 535
 536         synaptics_mode_cmd(psmouse, priv->mode);
 537 }
 538
 539 /*****************************************************************************
 540  *      Synaptics pass-through PS/2 port support
 541  ****************************************************************************/
 542 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 543 {
 544         struct psmouse *parent = serio_get_drvdata(serio->parent);
 545         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 546
 547         if (psmouse_sliced_command(parent, c))
 548                 return -1;
 549         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 550                 return -1;
 551         return 0;
 552 }
 553
 554 static int synaptics_pt_start(struct serio *serio)
 555 {
 556         struct psmouse *parent = serio_get_drvdata(serio->parent);
 557         struct synaptics_data *priv = parent->private;
 558
 559         serio_pause_rx(parent->ps2dev.serio);
 560         priv->pt_port = serio;
 561         serio_continue_rx(parent->ps2dev.serio);
 562
 563         return 0;
 564 }
 565
 566 static void synaptics_pt_stop(struct serio *serio)
 567 {
 568         struct psmouse *parent = serio_get_drvdata(serio->parent);
 569         struct synaptics_data *priv = parent->private;
 570
 571         serio_pause_rx(parent->ps2dev.serio);
 572         priv->pt_port = NULL;
 573         serio_continue_rx(parent->ps2dev.serio);
 574 }
 575
 576 static int synaptics_is_pt_packet(unsigned char *buf)
 577 {
 578         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 579 }
 580
 581 static void synaptics_pass_pt_packet(struct psmouse *psmouse,
 582                                      struct serio *ptport,
 583                                      unsigned char *packet)
 584 {
 585         struct synaptics_data *priv = psmouse->private;
 586         struct psmouse *child = serio_get_drvdata(ptport);
 587
 588         if (child && child->state == PSMOUSE_ACTIVATED) {
 589                 serio_interrupt(ptport, packet[1] | priv->pt_buttons, 0);
 590                 serio_interrupt(ptport, packet[4], 0);
 591                 serio_interrupt(ptport, packet[5], 0);
 592                 if (child->pktsize == 4)
 593                         serio_interrupt(ptport, packet[2], 0);
 594         } else {
 595                 serio_interrupt(ptport, packet[1], 0);
 596         }
 597 }
 598
 599 static void synaptics_pt_activate(struct psmouse *psmouse)
 600 {
 601         struct synaptics_data *priv = psmouse->private;
 602         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 603
 604         /* adjust the touchpad to child's choice of protocol */
 605         if (child) {
 606                 if (child->pktsize == 4)
 607                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 608                 else
 609                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 610
 611                 if (synaptics_mode_cmd(psmouse, priv->mode))
 612                         psmouse_warn(psmouse,
 613                                      "failed to switch guest protocol\n");
 614         }
 615 }
 616
 617 static void synaptics_pt_create(struct psmouse *psmouse)
 618 {
 619         struct serio *serio;
 620
 621         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 622         if (!serio) {
 623                 psmouse_err(psmouse,
 624                             "not enough memory for pass-through port\n");
 625                 return;
 626         }
 627
 628         serio->id.type = SERIO_PS_PSTHRU;
 629         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 630         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 631         serio->write = synaptics_pt_write;
 632         serio->start = synaptics_pt_start;
 633         serio->stop = synaptics_pt_stop;
 634         serio->parent = psmouse->ps2dev.serio;
 635
 636         psmouse->pt_activate = synaptics_pt_activate;
 637
 638         psmouse_info(psmouse, "serio: %s port at %s\n",
 639                      serio->name, psmouse->phys);
 640         serio_register_port(serio);
 641 }
 642
 643 /*****************************************************************************
 644  *      Functions to interpret the absolute mode packets
 645  ****************************************************************************/
 646
 647 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 648                                    int sgm, int agm)
 649 {
 650         state->count = count;
 651         state->sgm = sgm;
 652         state->agm = agm;
 653 }
 654
 655 static void synaptics_parse_agm(const unsigned char buf[],
 656                                 struct synaptics_data *priv,
 657                                 struct synaptics_hw_state *hw)
 658 {
 659         struct synaptics_hw_state *agm = &priv->agm;
 660         int agm_packet_type;
 661
 662         agm_packet_type = (buf[5] & 0x30) >> 4;
 663         switch (agm_packet_type) {
 664         case 1:
 665                 /* Gesture packet: (x, y, z) half resolution */
 666                 agm->w = hw->w;
 667                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 668                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 669                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 670                 break;
 671
 672         case 2:
 673                 /* AGM-CONTACT packet: (count, sgm, agm) */
 674                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 675                 break;
 676
 677         default:
 678                 break;
 679         }
 680
 681         /* Record that at least one AGM has been received since last SGM */
 682         priv->agm_pending = true;
 683 }
 684
 685 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 686                                         struct synaptics_data *priv,
 687                                         struct synaptics_hw_state *hw)
 688 {
 689         unsigned int ext_bits =
 690                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 691         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 692
 693         hw->ext_buttons = buf[4] & ext_mask;
 694         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 695 }
 696
 697 static bool is_forcepad;
 698
 699 static int synaptics_parse_hw_state(const unsigned char buf[],
 700                                     struct synaptics_data *priv,
 701                                     struct synaptics_hw_state *hw)
 702 {
 703         memset(hw, 0, sizeof(struct synaptics_hw_state));
 704
 705         if (SYN_MODEL_NEWABS(priv->model_id)) {
 706                 hw->w = (((buf[0] & 0x30) >> 2) |
 707                          ((buf[0] & 0x04) >> 1) |
 708                          ((buf[3] & 0x04) >> 2));
 709
 710                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 711                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 712                     hw->w == 2) {
 713                         synaptics_parse_agm(buf, priv, hw);
 714                         return 1;
 715                 }
 716
 717                 hw->x = (((buf[3] & 0x10) << 8) |
 718                          ((buf[1] & 0x0f) << 8) |
 719                          buf[4]);
 720                 hw->y = (((buf[3] & 0x20) << 7) |
 721                          ((buf[1] & 0xf0) << 4) |
 722                          buf[5]);
 723                 hw->z = buf[2];
 724
 725                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 726                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 727
 728                 if (is_forcepad) {
 729                         /*
 730                          * ForcePads, like Clickpads, use middle button
 731                          * bits to report primary button clicks.
 732                          * Unfortunately they report primary button not
 733                          * only when user presses on the pad above certain
 734                          * threshold, but also when there are more than one
 735                          * finger on the touchpad, which interferes with
 736                          * out multi-finger gestures.
 737                          */
 738                         if (hw->z == 0) {
 739                                 /* No contacts */
 740                                 priv->press = priv->report_press = false;
 741                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 742                                 /*
 743                                  * Single-finger touch with pressure above
 744                                  * the threshold. If pressure stays long
 745                                  * enough, we'll start reporting primary
 746                                  * button. We rely on the device continuing
 747                                  * sending data even if finger does not
 748                                  * move.
 749                                  */
 750                                 if  (!priv->press) {
 751                                         priv->press_start = jiffies;
 752                                         priv->press = true;
 753                                 } else if (time_after(jiffies,
 754                                                 priv->press_start +
 755                                                         msecs_to_jiffies(50))) {
 756                                         priv->report_press = true;
 757                                 }
 758                         } else {
 759                                 priv->press = false;
 760                         }
 761
 762                         hw->left = priv->report_press;
 763
 764                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 765                         /*
 766                          * Clickpad's button is transmitted as middle button,
 767                          * however, since it is primary button, we will report
 768                          * it as BTN_LEFT.
 769                          */
 770                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 771
 772                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 773                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 774                         if (hw->w == 2)
 775                                 hw->scroll = (signed char)(buf[1]);
 776                 }
 777
 778                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 779                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 780                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 781                 }
 782
 783                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 784                     ((buf[0] ^ buf[3]) & 0x02)) {
 785                         synaptics_parse_ext_buttons(buf, priv, hw);
 786                 }
 787         } else {
 788                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 789                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 790
 791                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 792                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 793
 794                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 795                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 796         }
 797
 798         /*
 799          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 800          * is used by some firmware to indicate a finger at the edge of
 801          * the touchpad whose precise position cannot be determined, so
 802          * convert these values to the maximum axis value.
 803          */
 804         if (hw->x > X_MAX_POSITIVE)
 805                 hw->x -= 1 << ABS_POS_BITS;
 806         else if (hw->x == X_MAX_POSITIVE)
 807                 hw->x = XMAX;
 808
 809         if (hw->y > Y_MAX_POSITIVE)
 810                 hw->y -= 1 << ABS_POS_BITS;
 811         else if (hw->y == Y_MAX_POSITIVE)
 812                 hw->y = YMAX;
 813
 814         return 0;
 815 }
 816
 817 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 818                                           bool active, int x, int y)
 819 {
 820         input_mt_slot(dev, slot);
 821         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 822         if (active) {
 823                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 824                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 825         }
 826 }
 827
 828 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 829                                           const struct synaptics_hw_state *a,
 830                                           const struct synaptics_hw_state *b,
 831                                           int num_fingers)
 832 {
 833         if (num_fingers >= 2) {
 834                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 835                                               min(a->y, b->y));
 836                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 837                                               max(a->y, b->y));
 838         } else if (num_fingers == 1) {
 839                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 840                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 841         } else {
 842                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 843                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 844         }
 845 }
 846
 847 static void synaptics_report_ext_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         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 853         char buf[6] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 854         int i;
 855
 856         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 857                 return;
 858
 859         /* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
 860         if (SYN_ID_FULL(priv->identity) == 0x801 &&
 861             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 862                 return;
 863
 864         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10)) {
 865                 for (i = 0; i < ext_bits; i++) {
 866                         input_report_key(dev, BTN_0 + 2 * i,
 867                                 hw->ext_buttons & (1 << i));
 868                         input_report_key(dev, BTN_1 + 2 * i,
 869                                 hw->ext_buttons & (1 << (i + ext_bits)));
 870                 }
 871                 return;
 872         }
 873
 874         /*
 875          * This generation of touchpads has the trackstick buttons
 876          * physically wired to the touchpad. Re-route them through
 877          * the pass-through interface.
 878          */
 879         if (!priv->pt_port)
 880                 return;
 881
 882         /* The trackstick expects at most 3 buttons */
 883         priv->pt_buttons = SYN_CAP_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 884                            SYN_CAP_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 885                            SYN_CAP_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 886
 887         synaptics_pass_pt_packet(psmouse, priv->pt_port, buf);
 888 }
 889
 890 static void synaptics_report_buttons(struct psmouse *psmouse,
 891                                      const struct synaptics_hw_state *hw)
 892 {
 893         struct input_dev *dev = psmouse->dev;
 894         struct synaptics_data *priv = psmouse->private;
 895
 896         input_report_key(dev, BTN_LEFT, hw->left);
 897         input_report_key(dev, BTN_RIGHT, hw->right);
 898
 899         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 900                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 901
 902         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 903                 input_report_key(dev, BTN_FORWARD, hw->up);
 904                 input_report_key(dev, BTN_BACK, hw->down);
 905         }
 906
 907         synaptics_report_ext_buttons(psmouse, hw);
 908 }
 909
 910 static void synaptics_report_slot(struct input_dev *dev, int slot,
 911                                   const struct synaptics_hw_state *hw)
 912 {
 913         input_mt_slot(dev, slot);
 914         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 915         if (!hw)
 916                 return;
 917
 918         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 919         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 920         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 921 }
 922
 923 static void synaptics_report_mt_data(struct psmouse *psmouse,
 924                                      struct synaptics_mt_state *mt_state,
 925                                      const struct synaptics_hw_state *sgm)
 926 {
 927         struct input_dev *dev = psmouse->dev;
 928         struct synaptics_data *priv = psmouse->private;
 929         struct synaptics_hw_state *agm = &priv->agm;
 930         struct synaptics_mt_state *old = &priv->mt_state;
 931
 932         switch (mt_state->count) {
 933         case 0:
 934                 synaptics_report_slot(dev, 0, NULL);
 935                 synaptics_report_slot(dev, 1, NULL);
 936                 break;
 937         case 1:
 938                 if (mt_state->sgm == -1) {
 939                         synaptics_report_slot(dev, 0, NULL);
 940                         synaptics_report_slot(dev, 1, NULL);
 941                 } else if (mt_state->sgm == 0) {
 942                         synaptics_report_slot(dev, 0, sgm);
 943                         synaptics_report_slot(dev, 1, NULL);
 944                 } else {
 945                         synaptics_report_slot(dev, 0, NULL);
 946                         synaptics_report_slot(dev, 1, sgm);
 947                 }
 948                 break;
 949         default:
 950                 /*
 951                  * If the finger slot contained in SGM is valid, and either
 952                  * hasn't changed, or is new, or the old SGM has now moved to
 953                  * AGM, then report SGM in MTB slot 0.
 954                  * Otherwise, empty MTB slot 0.
 955                  */
 956                 if (mt_state->sgm != -1 &&
 957                     (mt_state->sgm == old->sgm ||
 958                      old->sgm == -1 || mt_state->agm == old->sgm))
 959                         synaptics_report_slot(dev, 0, sgm);
 960                 else
 961                         synaptics_report_slot(dev, 0, NULL);
 962
 963                 /*
 964                  * If the finger slot contained in AGM is valid, and either
 965                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 966                  * Otherwise, empty MTB slot 1.
 967                  *
 968                  * However, in the case where the AGM is new, make sure that
 969                  * that it is either the same as the old SGM, or there was no
 970                  * SGM.
 971                  *
 972                  * Otherwise, if the SGM was just 1, and the new AGM is 2, then
 973                  * the new AGM will keep the old SGM's tracking ID, which can
 974                  * cause apparent drumroll.  This happens if in the following
 975                  * valid finger sequence:
 976                  *
 977                  *  Action                 SGM  AGM (MTB slot:Contact)
 978                  *  1. Touch contact 0    (0:0)
 979                  *  2. Touch contact 1    (0:0, 1:1)
 980                  *  3. Lift  contact 0    (1:1)
 981                  *  4. Touch contacts 2,3 (0:2, 1:3)
 982                  *
 983                  * In step 4, contact 3, in AGM must not be given the same
 984                  * tracking ID as contact 1 had in step 3.  To avoid this,
 985                  * the first agm with contact 3 is dropped and slot 1 is
 986                  * invalidated (tracking ID = -1).
 987                  */
 988                 if (mt_state->agm != -1 &&
 989                     (mt_state->agm == old->agm ||
 990                      (old->agm == -1 &&
 991                       (old->sgm == -1 || mt_state->agm == old->sgm))))
 992                         synaptics_report_slot(dev, 1, agm);
 993                 else
 994                         synaptics_report_slot(dev, 1, NULL);
 995                 break;
 996         }
 997
 998         /* Don't use active slot count to generate BTN_TOOL events. */
 999         input_mt_report_pointer_emulation(dev, false);
1000
1001         /* Send the number of fingers reported by touchpad itself. */
1002         input_mt_report_finger_count(dev, mt_state->count);
1003
1004         synaptics_report_buttons(psmouse, sgm);
1005
1006         input_sync(dev);
1007 }
1008
1009 /* Handle case where mt_state->count = 0 */
1010 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
1011                                       struct synaptics_mt_state *mt_state)
1012 {
1013         synaptics_mt_state_set(mt_state, 0, -1, -1);
1014         priv->mt_state_lost = false;
1015 }
1016
1017 /* Handle case where mt_state->count = 1 */
1018 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
1019                                       struct synaptics_mt_state *mt_state)
1020 {
1021         struct synaptics_hw_state *agm = &priv->agm;
1022         struct synaptics_mt_state *old = &priv->mt_state;
1023
1024         /*
1025          * If the last AGM was (0,0,0), and there is only one finger left,
1026          * then we absolutely know that SGM contains slot 0, and all other
1027          * fingers have been removed.
1028          */
1029         if (priv->agm_pending && agm->z == 0) {
1030                 synaptics_mt_state_set(mt_state, 1, 0, -1);
1031                 priv->mt_state_lost = false;
1032                 return;
1033         }
1034
1035         switch (old->count) {
1036         case 0:
1037                 synaptics_mt_state_set(mt_state, 1, 0, -1);
1038                 break;
1039         case 1:
1040                 /*
1041                  * If mt_state_lost, then the previous transition was 3->1,
1042                  * and SGM now contains either slot 0 or 1, but we don't know
1043                  * which.  So, we just assume that the SGM now contains slot 1.
1044                  *
1045                  * If pending AGM and either:
1046                  *   (a) the previous SGM slot contains slot 0, or
1047                  *   (b) there was no SGM slot
1048                  * then, the SGM now contains slot 1
1049                  *
1050                  * Case (a) happens with very rapid "drum roll" gestures, where
1051                  * slot 0 finger is lifted and a new slot 1 finger touches
1052                  * within one reporting interval.
1053                  *
1054                  * Case (b) happens if initially two or more fingers tap
1055                  * briefly, and all but one lift before the end of the first
1056                  * reporting interval.
1057                  *
1058                  * (In both these cases, slot 0 will becomes empty, so SGM
1059                  * contains slot 1 with the new finger)
1060                  *
1061                  * Else, if there was no previous SGM, it now contains slot 0.
1062                  *
1063                  * Otherwise, SGM still contains the same slot.
1064                  */
1065                 if (priv->mt_state_lost ||
1066                     (priv->agm_pending && old->sgm <= 0))
1067                         synaptics_mt_state_set(mt_state, 1, 1, -1);
1068                 else if (old->sgm == -1)
1069                         synaptics_mt_state_set(mt_state, 1, 0, -1);
1070                 break;
1071         case 2:
1072                 /*
1073                  * If mt_state_lost, we don't know which finger SGM contains.
1074                  *
1075                  * So, report 1 finger, but with both slots empty.
1076                  * We will use slot 1 on subsequent 1->1
1077                  */
1078                 if (priv->mt_state_lost) {
1079                         synaptics_mt_state_set(mt_state, 1, -1, -1);
1080                         break;
1081                 }
1082                 /*
1083                  * Since the last AGM was NOT (0,0,0), it was the finger in
1084                  * slot 0 that has been removed.
1085                  * So, SGM now contains previous AGM's slot, and AGM is now
1086                  * empty.
1087                  */
1088                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
1089                 break;
1090         case 3:
1091                 /*
1092                  * Since last AGM was not (0,0,0), we don't know which finger
1093                  * is left.
1094                  *
1095                  * So, report 1 finger, but with both slots empty.
1096                  * We will use slot 1 on subsequent 1->1
1097                  */
1098                 synaptics_mt_state_set(mt_state, 1, -1, -1);
1099                 priv->mt_state_lost = true;
1100                 break;
1101         case 4:
1102         case 5:
1103                 /* mt_state was updated by AGM-CONTACT packet */
1104                 break;
1105         }
1106 }
1107
1108 /* Handle case where mt_state->count = 2 */
1109 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1110                                       struct synaptics_mt_state *mt_state)
1111 {
1112         struct synaptics_mt_state *old = &priv->mt_state;
1113
1114         switch (old->count) {
1115         case 0:
1116                 synaptics_mt_state_set(mt_state, 2, 0, 1);
1117                 break;
1118         case 1:
1119                 /*
1120                  * If previous SGM contained slot 1 or higher, SGM now contains
1121                  * slot 0 (the newly touching finger) and AGM contains SGM's
1122                  * previous slot.
1123                  *
1124                  * Otherwise, SGM still contains slot 0 and AGM now contains
1125                  * slot 1.
1126                  */
1127                 if (old->sgm >= 1)
1128                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1129                 else
1130                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1131                 break;
1132         case 2:
1133                 /*
1134                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
1135                  * we don't know which.
1136                  * So, we just assume that the SGM contains slot 0 and AGM 1.
1137                  */
1138                 if (priv->mt_state_lost)
1139                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1140                 /*
1141                  * Otherwise, use the same mt_state, since it either hasn't
1142                  * changed, or was updated by a recently received AGM-CONTACT
1143                  * packet.
1144                  */
1145                 break;
1146         case 3:
1147                 /*
1148                  * 3->2 transitions have two unsolvable problems:
1149                  *  1) no indication is given which finger was removed
1150                  *  2) no way to tell if agm packet was for finger 3
1151                  *     before 3->2, or finger 2 after 3->2.
1152                  *
1153                  * So, report 2 fingers, but empty all slots.
1154                  * We will guess slots [0,1] on subsequent 2->2.
1155                  */
1156                 synaptics_mt_state_set(mt_state, 2, -1, -1);
1157                 priv->mt_state_lost = true;
1158                 break;
1159         case 4:
1160         case 5:
1161                 /* mt_state was updated by AGM-CONTACT packet */
1162                 break;
1163         }
1164 }
1165
1166 /* Handle case where mt_state->count = 3 */
1167 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1168                                       struct synaptics_mt_state *mt_state)
1169 {
1170         struct synaptics_mt_state *old = &priv->mt_state;
1171
1172         switch (old->count) {
1173         case 0:
1174                 synaptics_mt_state_set(mt_state, 3, 0, 2);
1175                 break;
1176         case 1:
1177                 /*
1178                  * If previous SGM contained slot 2 or higher, SGM now contains
1179                  * slot 0 (one of the newly touching fingers) and AGM contains
1180                  * SGM's previous slot.
1181                  *
1182                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1183                  */
1184                 if (old->sgm >= 2)
1185                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1186                 else
1187                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1188                 break;
1189         case 2:
1190                 /*
1191                  * If the AGM previously contained slot 3 or higher, then the
1192                  * newly touching finger is in the lowest available slot.
1193                  *
1194                  * If SGM was previously 1 or higher, then the new SGM is
1195                  * now slot 0 (with a new finger), otherwise, the new finger
1196                  * is now in a hidden slot between 0 and AGM's slot.
1197                  *
1198                  * In all such cases, the SGM now contains slot 0, and the AGM
1199                  * continues to contain the same slot as before.
1200                  */
1201                 if (old->agm >= 3) {
1202                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1203                         break;
1204                 }
1205
1206                 /*
1207                  * After some 3->1 and all 3->2 transitions, we lose track
1208                  * of which slot is reported by SGM and AGM.
1209                  *
1210                  * For 2->3 in this state, report 3 fingers, but empty all
1211                  * slots, and we will guess (0,2) on a subsequent 0->3.
1212                  *
1213                  * To userspace, the resulting transition will look like:
1214                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1215                  */
1216                 if (priv->mt_state_lost) {
1217                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1218                         break;
1219                 }
1220
1221                 /*
1222                  * If the (SGM,AGM) really previously contained slots (0, 1),
1223                  * then we cannot know what slot was just reported by the AGM,
1224                  * because the 2->3 transition can occur either before or after
1225                  * the AGM packet. Thus, this most recent AGM could contain
1226                  * either the same old slot 1 or the new slot 2.
1227                  * Subsequent AGMs will be reporting slot 2.
1228                  *
1229                  * To userspace, the resulting transition will look like:
1230                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1231                  */
1232                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1233                 break;
1234         case 3:
1235                 /*
1236                  * If, for whatever reason, the previous agm was invalid,
1237                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1238                  */
1239                 if (old->agm <= 2)
1240                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1241                 /*
1242                  * mt_state either hasn't changed, or was updated by a recently
1243                  * received AGM-CONTACT packet.
1244                  */
1245                 break;
1246
1247         case 4:
1248         case 5:
1249                 /* mt_state was updated by AGM-CONTACT packet */
1250                 break;
1251         }
1252 }
1253
1254 /* Handle case where mt_state->count = 4, or = 5 */
1255 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1256                                        struct synaptics_mt_state *mt_state)
1257 {
1258         /* mt_state was updated correctly by AGM-CONTACT packet */
1259         priv->mt_state_lost = false;
1260 }
1261
1262 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1263                                            struct synaptics_hw_state *sgm)
1264 {
1265         struct synaptics_data *priv = psmouse->private;
1266         struct synaptics_hw_state *agm = &priv->agm;
1267         struct synaptics_mt_state mt_state;
1268
1269         /* Initialize using current mt_state (as updated by last agm) */
1270         mt_state = agm->mt_state;
1271
1272         /*
1273          * Update mt_state using the new finger count and current mt_state.
1274          */
1275         if (sgm->z == 0)
1276                 synaptics_image_sensor_0f(priv, &mt_state);
1277         else if (sgm->w >= 4)
1278                 synaptics_image_sensor_1f(priv, &mt_state);
1279         else if (sgm->w == 0)
1280                 synaptics_image_sensor_2f(priv, &mt_state);
1281         else if (sgm->w == 1 && mt_state.count <= 3)
1282                 synaptics_image_sensor_3f(priv, &mt_state);
1283         else
1284                 synaptics_image_sensor_45f(priv, &mt_state);
1285
1286         /* Send resulting input events to user space */
1287         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1288
1289         /* Store updated mt_state */
1290         priv->mt_state = agm->mt_state = mt_state;
1291         priv->agm_pending = false;
1292 }
1293
1294 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1295                                              struct synaptics_hw_state *sgm,
1296                                              int num_fingers)
1297 {
1298         struct input_dev *dev = psmouse->dev;
1299         struct synaptics_data *priv = psmouse->private;
1300         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1301         struct input_mt_pos pos[2];
1302         int slot[2], nsemi, i;
1303
1304         nsemi = clamp_val(num_fingers, 0, 2);
1305
1306         for (i = 0; i < nsemi; i++) {
1307                 pos[i].x = hw[i]->x;
1308                 pos[i].y = synaptics_invert_y(hw[i]->y);
1309         }
1310
1311         input_mt_assign_slots(dev, slot, pos, nsemi);
1312
1313         for (i = 0; i < nsemi; i++) {
1314                 input_mt_slot(dev, slot[i]);
1315                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1316                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1317                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1318                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1319         }
1320
1321         input_mt_drop_unused(dev);
1322         input_mt_report_pointer_emulation(dev, false);
1323         input_mt_report_finger_count(dev, num_fingers);
1324
1325         synaptics_report_buttons(psmouse, sgm);
1326
1327         input_sync(dev);
1328 }
1329
1330 /*
1331  *  called for each full received packet from the touchpad
1332  */
1333 static void synaptics_process_packet(struct psmouse *psmouse)
1334 {
1335         struct input_dev *dev = psmouse->dev;
1336         struct synaptics_data *priv = psmouse->private;
1337         struct synaptics_hw_state hw;
1338         int num_fingers;
1339         int finger_width;
1340
1341         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1342                 return;
1343
1344         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1345                 synaptics_image_sensor_process(psmouse, &hw);
1346                 return;
1347         }
1348
1349         if (hw.scroll) {
1350                 priv->scroll += hw.scroll;
1351
1352                 while (priv->scroll >= 4) {
1353                         input_report_key(dev, BTN_BACK, !hw.down);
1354                         input_sync(dev);
1355                         input_report_key(dev, BTN_BACK, hw.down);
1356                         input_sync(dev);
1357                         priv->scroll -= 4;
1358                 }
1359                 while (priv->scroll <= -4) {
1360                         input_report_key(dev, BTN_FORWARD, !hw.up);
1361                         input_sync(dev);
1362                         input_report_key(dev, BTN_FORWARD, hw.up);
1363                         input_sync(dev);
1364                         priv->scroll += 4;
1365                 }
1366                 return;
1367         }
1368
1369         if (hw.z > 0 && hw.x > 1) {
1370                 num_fingers = 1;
1371                 finger_width = 5;
1372                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1373                         switch (hw.w) {
1374                         case 0 ... 1:
1375                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1376                                         num_fingers = hw.w + 2;
1377                                 break;
1378                         case 2:
1379                                 if (SYN_MODEL_PEN(priv->model_id))
1380                                         ;   /* Nothing, treat a pen as a single finger */
1381                                 break;
1382                         case 4 ... 15:
1383                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1384                                         finger_width = hw.w;
1385                                 break;
1386                         }
1387                 }
1388         } else {
1389                 num_fingers = 0;
1390                 finger_width = 0;
1391         }
1392
1393         if (cr48_profile_sensor) {
1394                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1395                 return;
1396         }
1397
1398         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1399                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1400                                               num_fingers);
1401
1402         /* Post events
1403          * BTN_TOUCH has to be first as mousedev relies on it when doing
1404          * absolute -> relative conversion
1405          */
1406         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1407         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1408
1409         if (num_fingers > 0) {
1410                 input_report_abs(dev, ABS_X, hw.x);
1411                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1412         }
1413         input_report_abs(dev, ABS_PRESSURE, hw.z);
1414
1415         if (SYN_CAP_PALMDETECT(priv->capabilities))
1416                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1417
1418         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1419         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1420                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1421                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1422         }
1423
1424         synaptics_report_buttons(psmouse, &hw);
1425
1426         input_sync(dev);
1427 }
1428
1429 static int synaptics_validate_byte(struct psmouse *psmouse,
1430                                    int idx, unsigned char pkt_type)
1431 {
1432         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1433         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1434         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1435         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1436         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1437         const char *packet = psmouse->packet;
1438
1439         if (idx < 0 || idx > 4)
1440                 return 0;
1441
1442         switch (pkt_type) {
1443
1444         case SYN_NEWABS:
1445         case SYN_NEWABS_RELAXED:
1446                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1447
1448         case SYN_NEWABS_STRICT:
1449                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1450
1451         case SYN_OLDABS:
1452                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1453
1454         default:
1455                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1456                 return 0;
1457         }
1458 }
1459
1460 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1461 {
1462         int i;
1463
1464         for (i = 0; i < 5; i++)
1465                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1466                         psmouse_info(psmouse, "using relaxed packet validation\n");
1467                         return SYN_NEWABS_RELAXED;
1468                 }
1469
1470         return SYN_NEWABS_STRICT;
1471 }
1472
1473 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1474 {
1475         struct synaptics_data *priv = psmouse->private;
1476
1477         if (psmouse->pktcnt >= 6) { /* Full packet received */
1478                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1479                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1480
1481                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1482                     synaptics_is_pt_packet(psmouse->packet)) {
1483                         if (priv->pt_port)
1484                                 synaptics_pass_pt_packet(psmouse, priv->pt_port,
1485                                                          psmouse->packet);
1486                 } else
1487                         synaptics_process_packet(psmouse);
1488
1489                 return PSMOUSE_FULL_PACKET;
1490         }
1491
1492         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1493                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1494 }
1495
1496 /*****************************************************************************
1497  *      Driver initialization/cleanup functions
1498  ****************************************************************************/
1499 static void set_abs_position_params(struct input_dev *dev,
1500                                     struct synaptics_data *priv, int x_code,
1501                                     int y_code)
1502 {
1503         int x_min = priv->x_min ?: XMIN_NOMINAL;
1504         int x_max = priv->x_max ?: XMAX_NOMINAL;
1505         int y_min = priv->y_min ?: YMIN_NOMINAL;
1506         int y_max = priv->y_max ?: YMAX_NOMINAL;
1507         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1508                         SYN_REDUCED_FILTER_FUZZ : 0;
1509
1510         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1511         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1512         input_abs_set_res(dev, x_code, priv->x_res);
1513         input_abs_set_res(dev, y_code, priv->y_res);
1514 }
1515
1516 static void set_input_params(struct psmouse *psmouse,
1517                              struct synaptics_data *priv)
1518 {
1519         struct input_dev *dev = psmouse->dev;
1520         int i;
1521
1522         /* Things that apply to both modes */
1523         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1524         __set_bit(EV_KEY, dev->evbit);
1525         __set_bit(BTN_LEFT, dev->keybit);
1526         __set_bit(BTN_RIGHT, dev->keybit);
1527
1528         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1529                 __set_bit(BTN_MIDDLE, dev->keybit);
1530
1531         if (!priv->absolute_mode) {
1532                 /* Relative mode */
1533                 __set_bit(EV_REL, dev->evbit);
1534                 __set_bit(REL_X, dev->relbit);
1535                 __set_bit(REL_Y, dev->relbit);
1536                 return;
1537         }
1538
1539         /* Absolute mode */
1540         __set_bit(EV_ABS, dev->evbit);
1541         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1542         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1543
1544         if (cr48_profile_sensor)
1545                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1546
1547         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1548                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1549                                         ABS_MT_POSITION_Y);
1550                 /* Image sensors can report per-contact pressure */
1551                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1552                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1553
1554                 /* Image sensors can signal 4 and 5 finger clicks */
1555                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1556                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1557         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1558                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1559                                         ABS_MT_POSITION_Y);
1560                 /*
1561                  * Profile sensor in CR-48 tracks contacts reasonably well,
1562                  * other non-image sensors with AGM use semi-mt.
1563                  */
1564                 input_mt_init_slots(dev, 2,
1565                                     INPUT_MT_POINTER |
1566                                     (cr48_profile_sensor ?
1567                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1568         }
1569
1570         if (SYN_CAP_PALMDETECT(priv->capabilities))
1571                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1572
1573         __set_bit(BTN_TOUCH, dev->keybit);
1574         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1575
1576         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1577                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1578                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1579         }
1580
1581         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1582             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1583                 __set_bit(BTN_FORWARD, dev->keybit);
1584                 __set_bit(BTN_BACK, dev->keybit);
1585         }
1586
1587         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1588                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1589                         __set_bit(BTN_0 + i, dev->keybit);
1590
1591         __clear_bit(EV_REL, dev->evbit);
1592         __clear_bit(REL_X, dev->relbit);
1593         __clear_bit(REL_Y, dev->relbit);
1594
1595         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1596                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1597                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1598                     !SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1599                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1600                 /* Clickpads report only left button */
1601                 __clear_bit(BTN_RIGHT, dev->keybit);
1602                 __clear_bit(BTN_MIDDLE, dev->keybit);
1603         }
1604 }
1605
1606 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1607                                               void *data, char *buf)
1608 {
1609         struct synaptics_data *priv = psmouse->private;
1610
1611         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1612 }
1613
1614 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1615                                              void *data, const char *buf,
1616                                              size_t len)
1617 {
1618         struct synaptics_data *priv = psmouse->private;
1619         unsigned int value;
1620         int err;
1621
1622         err = kstrtouint(buf, 10, &value);
1623         if (err)
1624                 return err;
1625
1626         if (value > 1)
1627                 return -EINVAL;
1628
1629         if (value == priv->disable_gesture)
1630                 return len;
1631
1632         priv->disable_gesture = value;
1633         if (value)
1634                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1635         else
1636                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1637
1638         if (synaptics_mode_cmd(psmouse, priv->mode))
1639                 return -EIO;
1640
1641         return len;
1642 }
1643
1644 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1645                     synaptics_show_disable_gesture,
1646                     synaptics_set_disable_gesture);
1647
1648 static void synaptics_disconnect(struct psmouse *psmouse)
1649 {
1650         struct synaptics_data *priv = psmouse->private;
1651
1652         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1653                 device_remove_file(&psmouse->ps2dev.serio->dev,
1654                                    &psmouse_attr_disable_gesture.dattr);
1655
1656         synaptics_reset(psmouse);
1657         kfree(priv);
1658         psmouse->private = NULL;
1659 }
1660
1661 static int synaptics_reconnect(struct psmouse *psmouse)
1662 {
1663         struct synaptics_data *priv = psmouse->private;
1664         struct synaptics_data old_priv = *priv;
1665         unsigned char param[2];
1666         int retry = 0;
1667         int error;
1668
1669         do {
1670                 psmouse_reset(psmouse);
1671                 if (retry) {
1672                         /*
1673                          * On some boxes, right after resuming, the touchpad
1674                          * needs some time to finish initializing (I assume
1675                          * it needs time to calibrate) and start responding
1676                          * to Synaptics-specific queries, so let's wait a
1677                          * bit.
1678                          */
1679                         ssleep(1);
1680                 }
1681                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1682                 error = synaptics_detect(psmouse, 0);
1683         } while (error && ++retry < 3);
1684
1685         if (error)
1686                 return -1;
1687
1688         if (retry > 1)
1689                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1690
1691         if (synaptics_query_hardware(psmouse)) {
1692                 psmouse_err(psmouse, "Unable to query device.\n");
1693                 return -1;
1694         }
1695
1696         if (synaptics_set_mode(psmouse)) {
1697                 psmouse_err(psmouse, "Unable to initialize device.\n");
1698                 return -1;
1699         }
1700
1701         if (old_priv.identity != priv->identity ||
1702             old_priv.model_id != priv->model_id ||
1703             old_priv.capabilities != priv->capabilities ||
1704             old_priv.ext_cap != priv->ext_cap) {
1705                 psmouse_err(psmouse,
1706                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1707                             old_priv.identity, priv->identity,
1708                             old_priv.model_id, priv->model_id,
1709                             old_priv.capabilities, priv->capabilities,
1710                             old_priv.ext_cap, priv->ext_cap);
1711                 return -1;
1712         }
1713
1714         return 0;
1715 }
1716
1717 static bool impaired_toshiba_kbc;
1718
1719 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1720 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1721         {
1722                 /* Toshiba Satellite */
1723                 .matches = {
1724                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1725                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1726                 },
1727         },
1728         {
1729                 /* Toshiba Dynabook */
1730                 .matches = {
1731                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1732                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1733                 },
1734         },
1735         {
1736                 /* Toshiba Portege M300 */
1737                 .matches = {
1738                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1739                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1740                 },
1741
1742         },
1743         {
1744                 /* Toshiba Portege M300 */
1745                 .matches = {
1746                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1747                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1748                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1749                 },
1750
1751         },
1752 #endif
1753         { }
1754 };
1755
1756 static bool broken_olpc_ec;
1757
1758 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1759 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1760         {
1761                 /* OLPC XO-1 or XO-1.5 */
1762                 .matches = {
1763                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1764                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1765                 },
1766         },
1767 #endif
1768         { }
1769 };
1770
1771 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1772 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1773         {
1774                 /* Cr-48 Chromebook (Codename Mario) */
1775                 .matches = {
1776                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1777                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1778                 },
1779         },
1780 #endif
1781         { }
1782 };
1783
1784 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1785 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1786         {
1787                 .matches = {
1788                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1789                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1790                 },
1791         },
1792 #endif
1793         { }
1794 };
1795
1796 void __init synaptics_module_init(void)
1797 {
1798         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1799         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1800         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1801
1802         /*
1803          * Unfortunately ForcePad capability is not exported over PS/2,
1804          * so we have to resort to checking DMI.
1805          */
1806         is_forcepad = dmi_check_system(forcepad_dmi_table);
1807 }
1808
1809 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1810 {
1811         struct synaptics_data *priv;
1812         int err = -1;
1813
1814         /*
1815          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1816          * packet spew overloads the EC such that key presses on the keyboard
1817          * are missed.  Given that, don't even attempt to use Absolute mode.
1818          * Relative mode seems to work just fine.
1819          */
1820         if (absolute_mode && broken_olpc_ec) {
1821                 psmouse_info(psmouse,
1822                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1823                 return -ENODEV;
1824         }
1825
1826         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1827         if (!priv)
1828                 return -ENOMEM;
1829
1830         psmouse_reset(psmouse);
1831
1832         if (synaptics_query_hardware(psmouse)) {
1833                 psmouse_err(psmouse, "Unable to query device.\n");
1834                 goto init_fail;
1835         }
1836
1837         priv->absolute_mode = absolute_mode;
1838         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1839                 priv->disable_gesture = true;
1840
1841         if (synaptics_set_mode(psmouse)) {
1842                 psmouse_err(psmouse, "Unable to initialize device.\n");
1843                 goto init_fail;
1844         }
1845
1846         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1847
1848         psmouse_info(psmouse,
1849                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1850                      SYN_ID_MODEL(priv->identity),
1851                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1852                      priv->model_id,
1853                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1854                      priv->board_id, priv->firmware_id);
1855
1856         set_input_params(psmouse, priv);
1857
1858         /*
1859          * Encode touchpad model so that it can be used to set
1860          * input device->id.version and be visible to userspace.
1861          * Because version is __u16 we have to drop something.
1862          * Hardware info bits seem to be good candidates as they
1863          * are documented to be for Synaptics corp. internal use.
1864          */
1865         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1866                           (priv->model_id & 0x000000ff);
1867
1868         if (absolute_mode) {
1869                 psmouse->protocol_handler = synaptics_process_byte;
1870                 psmouse->pktsize = 6;
1871         } else {
1872                 /* Relative mode follows standard PS/2 mouse protocol */
1873                 psmouse->protocol_handler = psmouse_process_byte;
1874                 psmouse->pktsize = 3;
1875         }
1876
1877         psmouse->set_rate = synaptics_set_rate;
1878         psmouse->disconnect = synaptics_disconnect;
1879         psmouse->reconnect = synaptics_reconnect;
1880         psmouse->cleanup = synaptics_reset;
1881         /* Synaptics can usually stay in sync without extra help */
1882         psmouse->resync_time = 0;
1883
1884         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1885                 synaptics_pt_create(psmouse);
1886
1887         /*
1888          * Toshiba's KBC seems to have trouble handling data from
1889          * Synaptics at full rate.  Switch to a lower rate (roughly
1890          * the same rate as a standard PS/2 mouse).
1891          */
1892         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1893                 psmouse_info(psmouse,
1894                              "Toshiba %s detected, limiting rate to 40pps.\n",
1895                              dmi_get_system_info(DMI_PRODUCT_NAME));
1896                 psmouse->rate = 40;
1897         }
1898
1899         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1900                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1901                                          &psmouse_attr_disable_gesture.dattr);
1902                 if (err) {
1903                         psmouse_err(psmouse,
1904                                     "Failed to create disable_gesture attribute (%d)",
1905                                     err);
1906                         goto init_fail;
1907                 }
1908         }
1909
1910         return 0;
1911
1912  init_fail:
1913         kfree(priv);
1914         return err;
1915 }
1916
1917 int synaptics_init(struct psmouse *psmouse)
1918 {
1919         return __synaptics_init(psmouse, true);
1920 }
1921
1922 int synaptics_init_relative(struct psmouse *psmouse)
1923 {
1924         return __synaptics_init(psmouse, false);
1925 }
1926
1927 bool synaptics_supported(void)
1928 {
1929         return true;
1930 }
1931
1932 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1933
1934 void __init synaptics_module_init(void)
1935 {
1936 }
1937
1938 int synaptics_init(struct psmouse *psmouse)
1939 {
1940         return -ENOSYS;
1941 }
1942
1943 bool synaptics_supported(void)
1944 {
1945         return false;
1946 }
1947
1948 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */