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 []){"LEN2000", NULL},
 152                 {ANY_BOARD_ID, ANY_BOARD_ID},
 153                 1024, 5113, 2021, 4832
 154         },
 155         {
 156                 (const char * const []){"LEN2001", NULL},
 157                 {ANY_BOARD_ID, ANY_BOARD_ID},
 158                 1024, 5022, 2508, 4832
 159         },
 160         {
 161                 (const char * const []){"LEN2006", NULL},
 162                 {ANY_BOARD_ID, ANY_BOARD_ID},
 163                 1264, 5675, 1171, 4688
 164         },
 165         { }
 166 };
 167
 168 /* This list has been kindly provided by Synaptics. */
 169 static const char * const topbuttonpad_pnp_ids[] = {
 170         "LEN0017",
 171         "LEN0018",
 172         "LEN0019",
 173         "LEN0023",
 174         "LEN002A",
 175         "LEN002B",
 176         "LEN002C",
 177         "LEN002D",
 178         "LEN002E",
 179         "LEN0033", /* Helix */
 180         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 181         "LEN0035", /* X240 */
 182         "LEN0036", /* T440 */
 183         "LEN0037", /* X1 Carbon 2nd */
 184         "LEN0038",
 185         "LEN0039", /* T440s */
 186         "LEN0041",
 187         "LEN0042", /* Yoga */
 188         "LEN0045",
 189         "LEN0046",
 190         "LEN0047",
 191         "LEN0048",
 192         "LEN0049",
 193         "LEN2000", /* S540 */
 194         "LEN2001", /* Edge E431 */
 195         "LEN2002", /* Edge E531 */
 196         "LEN2003",
 197         "LEN2004", /* L440 */
 198         "LEN2005",
 199         "LEN2006",
 200         "LEN2007",
 201         "LEN2008",
 202         "LEN2009",
 203         "LEN200A",
 204         "LEN200B",
 205         NULL
 206 };
 207
 208 /*****************************************************************************
 209  *      Synaptics communications functions
 210  ****************************************************************************/
 211
 212 /*
 213  * Synaptics touchpads report the y coordinate from bottom to top, which is
 214  * opposite from what userspace expects.
 215  * This function is used to invert y before reporting.
 216  */
 217 static int synaptics_invert_y(int y)
 218 {
 219         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 220 }
 221
 222 /*
 223  * Send a command to the synpatics touchpad by special commands
 224  */
 225 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 226 {
 227         if (psmouse_sliced_command(psmouse, c))
 228                 return -1;
 229         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 230                 return -1;
 231         return 0;
 232 }
 233
 234 /*
 235  * Read the model-id bytes from the touchpad
 236  * see also SYN_MODEL_* macros
 237  */
 238 static int synaptics_model_id(struct psmouse *psmouse)
 239 {
 240         struct synaptics_data *priv = psmouse->private;
 241         unsigned char mi[3];
 242
 243         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 244                 return -1;
 245         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 246         return 0;
 247 }
 248
 249 /*
 250  * Read the board id from the touchpad
 251  * The board id is encoded in the "QUERY MODES" response
 252  */
 253 static int synaptics_board_id(struct psmouse *psmouse)
 254 {
 255         struct synaptics_data *priv = psmouse->private;
 256         unsigned char bid[3];
 257
 258         /* firmwares prior 7.5 have no board_id encoded */
 259         if (SYN_ID_FULL(priv->identity) < 0x705)
 260                 return 0;
 261
 262         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 263                 return -1;
 264         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 265         return 0;
 266 }
 267
 268 /*
 269  * Read the firmware id from the touchpad
 270  */
 271 static int synaptics_firmware_id(struct psmouse *psmouse)
 272 {
 273         struct synaptics_data *priv = psmouse->private;
 274         unsigned char fwid[3];
 275
 276         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 277                 return -1;
 278         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 279         return 0;
 280 }
 281
 282 /*
 283  * Read the capability-bits from the touchpad
 284  * see also the SYN_CAP_* macros
 285  */
 286 static int synaptics_capability(struct psmouse *psmouse)
 287 {
 288         struct synaptics_data *priv = psmouse->private;
 289         unsigned char cap[3];
 290
 291         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 292                 return -1;
 293         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 294         priv->ext_cap = priv->ext_cap_0c = 0;
 295
 296         /*
 297          * Older firmwares had submodel ID fixed to 0x47
 298          */
 299         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 300             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 301                 return -1;
 302         }
 303
 304         /*
 305          * Unless capExtended is set the rest of the flags should be ignored
 306          */
 307         if (!SYN_CAP_EXTENDED(priv->capabilities))
 308                 priv->capabilities = 0;
 309
 310         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 311                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 312                         psmouse_warn(psmouse,
 313                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 314                 } else {
 315                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 316
 317                         /*
 318                          * if nExtBtn is greater than 8 it should be considered
 319                          * invalid and treated as 0
 320                          */
 321                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 322                                 priv->ext_cap &= 0xff0fff;
 323                 }
 324         }
 325
 326         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 327                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 328                         psmouse_warn(psmouse,
 329                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 330                 } else {
 331                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 332                 }
 333         }
 334
 335         return 0;
 336 }
 337
 338 /*
 339  * Identify Touchpad
 340  * See also the SYN_ID_* macros
 341  */
 342 static int synaptics_identify(struct psmouse *psmouse)
 343 {
 344         struct synaptics_data *priv = psmouse->private;
 345         unsigned char id[3];
 346
 347         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 348                 return -1;
 349         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 350         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 351                 return 0;
 352         return -1;
 353 }
 354
 355 /*
 356  * Read touchpad resolution and maximum reported coordinates
 357  * Resolution is left zero if touchpad does not support the query
 358  */
 359
 360 static int synaptics_resolution(struct psmouse *psmouse)
 361 {
 362         struct synaptics_data *priv = psmouse->private;
 363         unsigned char resp[3];
 364
 365         if (SYN_ID_MAJOR(priv->identity) < 4)
 366                 return 0;
 367
 368         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 369                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 370                         priv->x_res = resp[0]; /* x resolution in units/mm */
 371                         priv->y_res = resp[2]; /* y resolution in units/mm */
 372                 }
 373         }
 374
 375         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 376             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 377                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 378                         psmouse_warn(psmouse,
 379                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 380                 } else {
 381                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 382                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 383                         psmouse_info(psmouse,
 384                                      "queried max coordinates: x [..%d], y [..%d]\n",
 385                                      priv->x_max, priv->y_max);
 386                 }
 387         }
 388
 389         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 390             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 391              /*
 392               * Firmware v8.1 does not report proper number of extended
 393               * capabilities, but has been proven to report correct min
 394               * coordinates.
 395               */
 396              SYN_ID_FULL(priv->identity) == 0x801)) {
 397                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 398                         psmouse_warn(psmouse,
 399                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 400                 } else {
 401                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 402                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 403                         psmouse_info(psmouse,
 404                                      "queried min coordinates: x [%d..], y [%d..]\n",
 405                                      priv->x_min, priv->y_min);
 406                 }
 407         }
 408
 409         return 0;
 410 }
 411
 412 /*
 413  * Apply quirk(s) if the hardware matches
 414  */
 415
 416 static void synaptics_apply_quirks(struct psmouse *psmouse)
 417 {
 418         struct synaptics_data *priv = psmouse->private;
 419         int i;
 420
 421         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 422                 if (!psmouse_matches_pnp_id(psmouse,
 423                                             min_max_pnpid_table[i].pnp_ids))
 424                         continue;
 425
 426                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 427                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 428                         continue;
 429
 430                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 431                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 432                         continue;
 433
 434                 priv->x_min = min_max_pnpid_table[i].x_min;
 435                 priv->x_max = min_max_pnpid_table[i].x_max;
 436                 priv->y_min = min_max_pnpid_table[i].y_min;
 437                 priv->y_max = min_max_pnpid_table[i].y_max;
 438                 psmouse_info(psmouse,
 439                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 440                              priv->x_min, priv->x_max,
 441                              priv->y_min, priv->y_max);
 442                 break;
 443         }
 444 }
 445
 446 static int synaptics_query_hardware(struct psmouse *psmouse)
 447 {
 448         if (synaptics_identify(psmouse))
 449                 return -1;
 450         if (synaptics_model_id(psmouse))
 451                 return -1;
 452         if (synaptics_firmware_id(psmouse))
 453                 return -1;
 454         if (synaptics_board_id(psmouse))
 455                 return -1;
 456         if (synaptics_capability(psmouse))
 457                 return -1;
 458         if (synaptics_resolution(psmouse))
 459                 return -1;
 460
 461         synaptics_apply_quirks(psmouse);
 462
 463         return 0;
 464 }
 465
 466 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 467 {
 468         static unsigned char param = 0xc8;
 469         struct synaptics_data *priv = psmouse->private;
 470
 471         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 472               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 473                 return 0;
 474
 475         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 476                 return -1;
 477
 478         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 479                 return -1;
 480
 481         /* Advanced gesture mode also sends multi finger data */
 482         priv->capabilities |= BIT(1);
 483
 484         return 0;
 485 }
 486
 487 static int synaptics_set_mode(struct psmouse *psmouse)
 488 {
 489         struct synaptics_data *priv = psmouse->private;
 490
 491         priv->mode = 0;
 492         if (priv->absolute_mode)
 493                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 494         if (priv->disable_gesture)
 495                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 496         if (psmouse->rate >= 80)
 497                 priv->mode |= SYN_BIT_HIGH_RATE;
 498         if (SYN_CAP_EXTENDED(priv->capabilities))
 499                 priv->mode |= SYN_BIT_W_MODE;
 500
 501         if (synaptics_mode_cmd(psmouse, priv->mode))
 502                 return -1;
 503
 504         if (priv->absolute_mode &&
 505             synaptics_set_advanced_gesture_mode(psmouse)) {
 506                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 507                 return -1;
 508         }
 509
 510         return 0;
 511 }
 512
 513 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 514 {
 515         struct synaptics_data *priv = psmouse->private;
 516
 517         if (rate >= 80) {
 518                 priv->mode |= SYN_BIT_HIGH_RATE;
 519                 psmouse->rate = 80;
 520         } else {
 521                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 522                 psmouse->rate = 40;
 523         }
 524
 525         synaptics_mode_cmd(psmouse, priv->mode);
 526 }
 527
 528 /*****************************************************************************
 529  *      Synaptics pass-through PS/2 port support
 530  ****************************************************************************/
 531 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 532 {
 533         struct psmouse *parent = serio_get_drvdata(serio->parent);
 534         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 535
 536         if (psmouse_sliced_command(parent, c))
 537                 return -1;
 538         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 539                 return -1;
 540         return 0;
 541 }
 542
 543 static int synaptics_pt_start(struct serio *serio)
 544 {
 545         struct psmouse *parent = serio_get_drvdata(serio->parent);
 546         struct synaptics_data *priv = parent->private;
 547
 548         serio_pause_rx(parent->ps2dev.serio);
 549         priv->pt_port = serio;
 550         serio_continue_rx(parent->ps2dev.serio);
 551
 552         return 0;
 553 }
 554
 555 static void synaptics_pt_stop(struct serio *serio)
 556 {
 557         struct psmouse *parent = serio_get_drvdata(serio->parent);
 558         struct synaptics_data *priv = parent->private;
 559
 560         serio_pause_rx(parent->ps2dev.serio);
 561         priv->pt_port = NULL;
 562         serio_continue_rx(parent->ps2dev.serio);
 563 }
 564
 565 static int synaptics_is_pt_packet(unsigned char *buf)
 566 {
 567         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 568 }
 569
 570 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 571 {
 572         struct psmouse *child = serio_get_drvdata(ptport);
 573
 574         if (child && child->state == PSMOUSE_ACTIVATED) {
 575                 serio_interrupt(ptport, packet[1], 0);
 576                 serio_interrupt(ptport, packet[4], 0);
 577                 serio_interrupt(ptport, packet[5], 0);
 578                 if (child->pktsize == 4)
 579                         serio_interrupt(ptport, packet[2], 0);
 580         } else
 581                 serio_interrupt(ptport, packet[1], 0);
 582 }
 583
 584 static void synaptics_pt_activate(struct psmouse *psmouse)
 585 {
 586         struct synaptics_data *priv = psmouse->private;
 587         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 588
 589         /* adjust the touchpad to child's choice of protocol */
 590         if (child) {
 591                 if (child->pktsize == 4)
 592                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 593                 else
 594                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 595
 596                 if (synaptics_mode_cmd(psmouse, priv->mode))
 597                         psmouse_warn(psmouse,
 598                                      "failed to switch guest protocol\n");
 599         }
 600 }
 601
 602 static void synaptics_pt_create(struct psmouse *psmouse)
 603 {
 604         struct serio *serio;
 605
 606         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 607         if (!serio) {
 608                 psmouse_err(psmouse,
 609                             "not enough memory for pass-through port\n");
 610                 return;
 611         }
 612
 613         serio->id.type = SERIO_PS_PSTHRU;
 614         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 615         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 616         serio->write = synaptics_pt_write;
 617         serio->start = synaptics_pt_start;
 618         serio->stop = synaptics_pt_stop;
 619         serio->parent = psmouse->ps2dev.serio;
 620
 621         psmouse->pt_activate = synaptics_pt_activate;
 622
 623         psmouse_info(psmouse, "serio: %s port at %s\n",
 624                      serio->name, psmouse->phys);
 625         serio_register_port(serio);
 626 }
 627
 628 /*****************************************************************************
 629  *      Functions to interpret the absolute mode packets
 630  ****************************************************************************/
 631
 632 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 633                                    int sgm, int agm)
 634 {
 635         state->count = count;
 636         state->sgm = sgm;
 637         state->agm = agm;
 638 }
 639
 640 static void synaptics_parse_agm(const unsigned char buf[],
 641                                 struct synaptics_data *priv,
 642                                 struct synaptics_hw_state *hw)
 643 {
 644         struct synaptics_hw_state *agm = &priv->agm;
 645         int agm_packet_type;
 646
 647         agm_packet_type = (buf[5] & 0x30) >> 4;
 648         switch (agm_packet_type) {
 649         case 1:
 650                 /* Gesture packet: (x, y, z) half resolution */
 651                 agm->w = hw->w;
 652                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 653                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 654                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 655                 break;
 656
 657         case 2:
 658                 /* AGM-CONTACT packet: (count, sgm, agm) */
 659                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 660                 break;
 661
 662         default:
 663                 break;
 664         }
 665
 666         /* Record that at least one AGM has been received since last SGM */
 667         priv->agm_pending = true;
 668 }
 669
 670 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 671                                         struct synaptics_data *priv,
 672                                         struct synaptics_hw_state *hw)
 673 {
 674         unsigned int ext_bits =
 675                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 676         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 677
 678         hw->ext_buttons = buf[4] & ext_mask;
 679         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 680 }
 681
 682 static bool is_forcepad;
 683
 684 static int synaptics_parse_hw_state(const unsigned char buf[],
 685                                     struct synaptics_data *priv,
 686                                     struct synaptics_hw_state *hw)
 687 {
 688         memset(hw, 0, sizeof(struct synaptics_hw_state));
 689
 690         if (SYN_MODEL_NEWABS(priv->model_id)) {
 691                 hw->w = (((buf[0] & 0x30) >> 2) |
 692                          ((buf[0] & 0x04) >> 1) |
 693                          ((buf[3] & 0x04) >> 2));
 694
 695                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 696                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 697                     hw->w == 2) {
 698                         synaptics_parse_agm(buf, priv, hw);
 699                         return 1;
 700                 }
 701
 702                 hw->x = (((buf[3] & 0x10) << 8) |
 703                          ((buf[1] & 0x0f) << 8) |
 704                          buf[4]);
 705                 hw->y = (((buf[3] & 0x20) << 7) |
 706                          ((buf[1] & 0xf0) << 4) |
 707                          buf[5]);
 708                 hw->z = buf[2];
 709
 710                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 711                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 712
 713                 if (is_forcepad) {
 714                         /*
 715                          * ForcePads, like Clickpads, use middle button
 716                          * bits to report primary button clicks.
 717                          * Unfortunately they report primary button not
 718                          * only when user presses on the pad above certain
 719                          * threshold, but also when there are more than one
 720                          * finger on the touchpad, which interferes with
 721                          * out multi-finger gestures.
 722                          */
 723                         if (hw->z == 0) {
 724                                 /* No contacts */
 725                                 priv->press = priv->report_press = false;
 726                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 727                                 /*
 728                                  * Single-finger touch with pressure above
 729                                  * the threshold. If pressure stays long
 730                                  * enough, we'll start reporting primary
 731                                  * button. We rely on the device continuing
 732                                  * sending data even if finger does not
 733                                  * move.
 734                                  */
 735                                 if  (!priv->press) {
 736                                         priv->press_start = jiffies;
 737                                         priv->press = true;
 738                                 } else if (time_after(jiffies,
 739                                                 priv->press_start +
 740                                                         msecs_to_jiffies(50))) {
 741                                         priv->report_press = true;
 742                                 }
 743                         } else {
 744                                 priv->press = false;
 745                         }
 746
 747                         hw->left = priv->report_press;
 748
 749                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 750                         /*
 751                          * Clickpad's button is transmitted as middle button,
 752                          * however, since it is primary button, we will report
 753                          * it as BTN_LEFT.
 754                          */
 755                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 756
 757                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 758                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 759                         if (hw->w == 2)
 760                                 hw->scroll = (signed char)(buf[1]);
 761                 }
 762
 763                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 764                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 765                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 766                 }
 767
 768                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 769                     ((buf[0] ^ buf[3]) & 0x02)) {
 770                         synaptics_parse_ext_buttons(buf, priv, hw);
 771                 }
 772         } else {
 773                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 774                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 775
 776                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 777                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 778
 779                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 780                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 781         }
 782
 783         /*
 784          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 785          * is used by some firmware to indicate a finger at the edge of
 786          * the touchpad whose precise position cannot be determined, so
 787          * convert these values to the maximum axis value.
 788          */
 789         if (hw->x > X_MAX_POSITIVE)
 790                 hw->x -= 1 << ABS_POS_BITS;
 791         else if (hw->x == X_MAX_POSITIVE)
 792                 hw->x = XMAX;
 793
 794         if (hw->y > Y_MAX_POSITIVE)
 795                 hw->y -= 1 << ABS_POS_BITS;
 796         else if (hw->y == Y_MAX_POSITIVE)
 797                 hw->y = YMAX;
 798
 799         return 0;
 800 }
 801
 802 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 803                                           bool active, int x, int y)
 804 {
 805         input_mt_slot(dev, slot);
 806         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 807         if (active) {
 808                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 809                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 810         }
 811 }
 812
 813 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 814                                           const struct synaptics_hw_state *a,
 815                                           const struct synaptics_hw_state *b,
 816                                           int num_fingers)
 817 {
 818         if (num_fingers >= 2) {
 819                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 820                                               min(a->y, b->y));
 821                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 822                                               max(a->y, b->y));
 823         } else if (num_fingers == 1) {
 824                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 825                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 826         } else {
 827                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 828                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 829         }
 830 }
 831
 832 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 833                                          const struct synaptics_hw_state *hw)
 834 {
 835         struct input_dev *dev = psmouse->dev;
 836         struct synaptics_data *priv = psmouse->private;
 837         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 838         int i;
 839
 840         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 841                 return;
 842
 843         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 844         if ((SYN_ID_FULL(priv->identity) == 0x801 ||
 845              SYN_ID_FULL(priv->identity) == 0x802) &&
 846             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 847                 return;
 848
 849         for (i = 0; i < ext_bits; i++) {
 850                 input_report_key(dev, BTN_0 + 2 * i,
 851                         hw->ext_buttons & (1 << i));
 852                 input_report_key(dev, BTN_1 + 2 * i,
 853                         hw->ext_buttons & (1 << (i + ext_bits)));
 854         }
 855 }
 856
 857 static void synaptics_report_buttons(struct psmouse *psmouse,
 858                                      const struct synaptics_hw_state *hw)
 859 {
 860         struct input_dev *dev = psmouse->dev;
 861         struct synaptics_data *priv = psmouse->private;
 862
 863         input_report_key(dev, BTN_LEFT, hw->left);
 864         input_report_key(dev, BTN_RIGHT, hw->right);
 865
 866         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 867                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 868
 869         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 870                 input_report_key(dev, BTN_FORWARD, hw->up);
 871                 input_report_key(dev, BTN_BACK, hw->down);
 872         }
 873
 874         synaptics_report_ext_buttons(psmouse, hw);
 875 }
 876
 877 static void synaptics_report_slot(struct input_dev *dev, int slot,
 878                                   const struct synaptics_hw_state *hw)
 879 {
 880         input_mt_slot(dev, slot);
 881         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 882         if (!hw)
 883                 return;
 884
 885         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 886         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 887         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 888 }
 889
 890 static void synaptics_report_mt_data(struct psmouse *psmouse,
 891                                      struct synaptics_mt_state *mt_state,
 892                                      const struct synaptics_hw_state *sgm)
 893 {
 894         struct input_dev *dev = psmouse->dev;
 895         struct synaptics_data *priv = psmouse->private;
 896         struct synaptics_hw_state *agm = &priv->agm;
 897         struct synaptics_mt_state *old = &priv->mt_state;
 898
 899         switch (mt_state->count) {
 900         case 0:
 901                 synaptics_report_slot(dev, 0, NULL);
 902                 synaptics_report_slot(dev, 1, NULL);
 903                 break;
 904         case 1:
 905                 if (mt_state->sgm == -1) {
 906                         synaptics_report_slot(dev, 0, NULL);
 907                         synaptics_report_slot(dev, 1, NULL);
 908                 } else if (mt_state->sgm == 0) {
 909                         synaptics_report_slot(dev, 0, sgm);
 910                         synaptics_report_slot(dev, 1, NULL);
 911                 } else {
 912                         synaptics_report_slot(dev, 0, NULL);
 913                         synaptics_report_slot(dev, 1, sgm);
 914                 }
 915                 break;
 916         default:
 917                 /*
 918                  * If the finger slot contained in SGM is valid, and either
 919                  * hasn't changed, or is new, or the old SGM has now moved to
 920                  * AGM, then report SGM in MTB slot 0.
 921                  * Otherwise, empty MTB slot 0.
 922                  */
 923                 if (mt_state->sgm != -1 &&
 924                     (mt_state->sgm == old->sgm ||
 925                      old->sgm == -1 || mt_state->agm == old->sgm))
 926                         synaptics_report_slot(dev, 0, sgm);
 927                 else
 928                         synaptics_report_slot(dev, 0, NULL);
 929
 930                 /*
 931                  * If the finger slot contained in AGM is valid, and either
 932                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 933                  * Otherwise, empty MTB slot 1.
 934                  *
 935                  * However, in the case where the AGM is new, make sure that
 936                  * that it is either the same as the old SGM, or there was no
 937                  * SGM.
 938                  *
 939                  * Otherwise, if the SGM was just 1, and the new AGM is 2, then
 940                  * the new AGM will keep the old SGM's tracking ID, which can
 941                  * cause apparent drumroll.  This happens if in the following
 942                  * valid finger sequence:
 943                  *
 944                  *  Action                 SGM  AGM (MTB slot:Contact)
 945                  *  1. Touch contact 0    (0:0)
 946                  *  2. Touch contact 1    (0:0, 1:1)
 947                  *  3. Lift  contact 0    (1:1)
 948                  *  4. Touch contacts 2,3 (0:2, 1:3)
 949                  *
 950                  * In step 4, contact 3, in AGM must not be given the same
 951                  * tracking ID as contact 1 had in step 3.  To avoid this,
 952                  * the first agm with contact 3 is dropped and slot 1 is
 953                  * invalidated (tracking ID = -1).
 954                  */
 955                 if (mt_state->agm != -1 &&
 956                     (mt_state->agm == old->agm ||
 957                      (old->agm == -1 &&
 958                       (old->sgm == -1 || mt_state->agm == old->sgm))))
 959                         synaptics_report_slot(dev, 1, agm);
 960                 else
 961                         synaptics_report_slot(dev, 1, NULL);
 962                 break;
 963         }
 964
 965         /* Don't use active slot count to generate BTN_TOOL events. */
 966         input_mt_report_pointer_emulation(dev, false);
 967
 968         /* Send the number of fingers reported by touchpad itself. */
 969         input_mt_report_finger_count(dev, mt_state->count);
 970
 971         synaptics_report_buttons(psmouse, sgm);
 972
 973         input_sync(dev);
 974 }
 975
 976 /* Handle case where mt_state->count = 0 */
 977 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
 978                                       struct synaptics_mt_state *mt_state)
 979 {
 980         synaptics_mt_state_set(mt_state, 0, -1, -1);
 981         priv->mt_state_lost = false;
 982 }
 983
 984 /* Handle case where mt_state->count = 1 */
 985 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
 986                                       struct synaptics_mt_state *mt_state)
 987 {
 988         struct synaptics_hw_state *agm = &priv->agm;
 989         struct synaptics_mt_state *old = &priv->mt_state;
 990
 991         /*
 992          * If the last AGM was (0,0,0), and there is only one finger left,
 993          * then we absolutely know that SGM contains slot 0, and all other
 994          * fingers have been removed.
 995          */
 996         if (priv->agm_pending && agm->z == 0) {
 997                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 998                 priv->mt_state_lost = false;
 999                 return;
1000         }
1001
1002         switch (old->count) {
1003         case 0:
1004                 synaptics_mt_state_set(mt_state, 1, 0, -1);
1005                 break;
1006         case 1:
1007                 /*
1008                  * If mt_state_lost, then the previous transition was 3->1,
1009                  * and SGM now contains either slot 0 or 1, but we don't know
1010                  * which.  So, we just assume that the SGM now contains slot 1.
1011                  *
1012                  * If pending AGM and either:
1013                  *   (a) the previous SGM slot contains slot 0, or
1014                  *   (b) there was no SGM slot
1015                  * then, the SGM now contains slot 1
1016                  *
1017                  * Case (a) happens with very rapid "drum roll" gestures, where
1018                  * slot 0 finger is lifted and a new slot 1 finger touches
1019                  * within one reporting interval.
1020                  *
1021                  * Case (b) happens if initially two or more fingers tap
1022                  * briefly, and all but one lift before the end of the first
1023                  * reporting interval.
1024                  *
1025                  * (In both these cases, slot 0 will becomes empty, so SGM
1026                  * contains slot 1 with the new finger)
1027                  *
1028                  * Else, if there was no previous SGM, it now contains slot 0.
1029                  *
1030                  * Otherwise, SGM still contains the same slot.
1031                  */
1032                 if (priv->mt_state_lost ||
1033                     (priv->agm_pending && old->sgm <= 0))
1034                         synaptics_mt_state_set(mt_state, 1, 1, -1);
1035                 else if (old->sgm == -1)
1036                         synaptics_mt_state_set(mt_state, 1, 0, -1);
1037                 break;
1038         case 2:
1039                 /*
1040                  * If mt_state_lost, we don't know which finger SGM contains.
1041                  *
1042                  * So, report 1 finger, but with both slots empty.
1043                  * We will use slot 1 on subsequent 1->1
1044                  */
1045                 if (priv->mt_state_lost) {
1046                         synaptics_mt_state_set(mt_state, 1, -1, -1);
1047                         break;
1048                 }
1049                 /*
1050                  * Since the last AGM was NOT (0,0,0), it was the finger in
1051                  * slot 0 that has been removed.
1052                  * So, SGM now contains previous AGM's slot, and AGM is now
1053                  * empty.
1054                  */
1055                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
1056                 break;
1057         case 3:
1058                 /*
1059                  * Since last AGM was not (0,0,0), we don't know which finger
1060                  * is left.
1061                  *
1062                  * So, report 1 finger, but with both slots empty.
1063                  * We will use slot 1 on subsequent 1->1
1064                  */
1065                 synaptics_mt_state_set(mt_state, 1, -1, -1);
1066                 priv->mt_state_lost = true;
1067                 break;
1068         case 4:
1069         case 5:
1070                 /* mt_state was updated by AGM-CONTACT packet */
1071                 break;
1072         }
1073 }
1074
1075 /* Handle case where mt_state->count = 2 */
1076 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1077                                       struct synaptics_mt_state *mt_state)
1078 {
1079         struct synaptics_mt_state *old = &priv->mt_state;
1080
1081         switch (old->count) {
1082         case 0:
1083                 synaptics_mt_state_set(mt_state, 2, 0, 1);
1084                 break;
1085         case 1:
1086                 /*
1087                  * If previous SGM contained slot 1 or higher, SGM now contains
1088                  * slot 0 (the newly touching finger) and AGM contains SGM's
1089                  * previous slot.
1090                  *
1091                  * Otherwise, SGM still contains slot 0 and AGM now contains
1092                  * slot 1.
1093                  */
1094                 if (old->sgm >= 1)
1095                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1096                 else
1097                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1098                 break;
1099         case 2:
1100                 /*
1101                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
1102                  * we don't know which.
1103                  * So, we just assume that the SGM contains slot 0 and AGM 1.
1104                  */
1105                 if (priv->mt_state_lost)
1106                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1107                 /*
1108                  * Otherwise, use the same mt_state, since it either hasn't
1109                  * changed, or was updated by a recently received AGM-CONTACT
1110                  * packet.
1111                  */
1112                 break;
1113         case 3:
1114                 /*
1115                  * 3->2 transitions have two unsolvable problems:
1116                  *  1) no indication is given which finger was removed
1117                  *  2) no way to tell if agm packet was for finger 3
1118                  *     before 3->2, or finger 2 after 3->2.
1119                  *
1120                  * So, report 2 fingers, but empty all slots.
1121                  * We will guess slots [0,1] on subsequent 2->2.
1122                  */
1123                 synaptics_mt_state_set(mt_state, 2, -1, -1);
1124                 priv->mt_state_lost = true;
1125                 break;
1126         case 4:
1127         case 5:
1128                 /* mt_state was updated by AGM-CONTACT packet */
1129                 break;
1130         }
1131 }
1132
1133 /* Handle case where mt_state->count = 3 */
1134 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1135                                       struct synaptics_mt_state *mt_state)
1136 {
1137         struct synaptics_mt_state *old = &priv->mt_state;
1138
1139         switch (old->count) {
1140         case 0:
1141                 synaptics_mt_state_set(mt_state, 3, 0, 2);
1142                 break;
1143         case 1:
1144                 /*
1145                  * If previous SGM contained slot 2 or higher, SGM now contains
1146                  * slot 0 (one of the newly touching fingers) and AGM contains
1147                  * SGM's previous slot.
1148                  *
1149                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1150                  */
1151                 if (old->sgm >= 2)
1152                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1153                 else
1154                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1155                 break;
1156         case 2:
1157                 /*
1158                  * If the AGM previously contained slot 3 or higher, then the
1159                  * newly touching finger is in the lowest available slot.
1160                  *
1161                  * If SGM was previously 1 or higher, then the new SGM is
1162                  * now slot 0 (with a new finger), otherwise, the new finger
1163                  * is now in a hidden slot between 0 and AGM's slot.
1164                  *
1165                  * In all such cases, the SGM now contains slot 0, and the AGM
1166                  * continues to contain the same slot as before.
1167                  */
1168                 if (old->agm >= 3) {
1169                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1170                         break;
1171                 }
1172
1173                 /*
1174                  * After some 3->1 and all 3->2 transitions, we lose track
1175                  * of which slot is reported by SGM and AGM.
1176                  *
1177                  * For 2->3 in this state, report 3 fingers, but empty all
1178                  * slots, and we will guess (0,2) on a subsequent 0->3.
1179                  *
1180                  * To userspace, the resulting transition will look like:
1181                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1182                  */
1183                 if (priv->mt_state_lost) {
1184                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1185                         break;
1186                 }
1187
1188                 /*
1189                  * If the (SGM,AGM) really previously contained slots (0, 1),
1190                  * then we cannot know what slot was just reported by the AGM,
1191                  * because the 2->3 transition can occur either before or after
1192                  * the AGM packet. Thus, this most recent AGM could contain
1193                  * either the same old slot 1 or the new slot 2.
1194                  * Subsequent AGMs will be reporting slot 2.
1195                  *
1196                  * To userspace, the resulting transition will look like:
1197                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1198                  */
1199                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1200                 break;
1201         case 3:
1202                 /*
1203                  * If, for whatever reason, the previous agm was invalid,
1204                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1205                  */
1206                 if (old->agm <= 2)
1207                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1208                 /*
1209                  * mt_state either hasn't changed, or was updated by a recently
1210                  * received AGM-CONTACT packet.
1211                  */
1212                 break;
1213
1214         case 4:
1215         case 5:
1216                 /* mt_state was updated by AGM-CONTACT packet */
1217                 break;
1218         }
1219 }
1220
1221 /* Handle case where mt_state->count = 4, or = 5 */
1222 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1223                                        struct synaptics_mt_state *mt_state)
1224 {
1225         /* mt_state was updated correctly by AGM-CONTACT packet */
1226         priv->mt_state_lost = false;
1227 }
1228
1229 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1230                                            struct synaptics_hw_state *sgm)
1231 {
1232         struct synaptics_data *priv = psmouse->private;
1233         struct synaptics_hw_state *agm = &priv->agm;
1234         struct synaptics_mt_state mt_state;
1235
1236         /* Initialize using current mt_state (as updated by last agm) */
1237         mt_state = agm->mt_state;
1238
1239         /*
1240          * Update mt_state using the new finger count and current mt_state.
1241          */
1242         if (sgm->z == 0)
1243                 synaptics_image_sensor_0f(priv, &mt_state);
1244         else if (sgm->w >= 4)
1245                 synaptics_image_sensor_1f(priv, &mt_state);
1246         else if (sgm->w == 0)
1247                 synaptics_image_sensor_2f(priv, &mt_state);
1248         else if (sgm->w == 1 && mt_state.count <= 3)
1249                 synaptics_image_sensor_3f(priv, &mt_state);
1250         else
1251                 synaptics_image_sensor_45f(priv, &mt_state);
1252
1253         /* Send resulting input events to user space */
1254         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1255
1256         /* Store updated mt_state */
1257         priv->mt_state = agm->mt_state = mt_state;
1258         priv->agm_pending = false;
1259 }
1260
1261 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1262                                              struct synaptics_hw_state *sgm,
1263                                              int num_fingers)
1264 {
1265         struct input_dev *dev = psmouse->dev;
1266         struct synaptics_data *priv = psmouse->private;
1267         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1268         struct input_mt_pos pos[2];
1269         int slot[2], nsemi, i;
1270
1271         nsemi = clamp_val(num_fingers, 0, 2);
1272
1273         for (i = 0; i < nsemi; i++) {
1274                 pos[i].x = hw[i]->x;
1275                 pos[i].y = synaptics_invert_y(hw[i]->y);
1276         }
1277
1278         input_mt_assign_slots(dev, slot, pos, nsemi);
1279
1280         for (i = 0; i < nsemi; i++) {
1281                 input_mt_slot(dev, slot[i]);
1282                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1283                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1284                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1285                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1286         }
1287
1288         input_mt_drop_unused(dev);
1289         input_mt_report_pointer_emulation(dev, false);
1290         input_mt_report_finger_count(dev, num_fingers);
1291
1292         synaptics_report_buttons(psmouse, sgm);
1293
1294         input_sync(dev);
1295 }
1296
1297 /*
1298  *  called for each full received packet from the touchpad
1299  */
1300 static void synaptics_process_packet(struct psmouse *psmouse)
1301 {
1302         struct input_dev *dev = psmouse->dev;
1303         struct synaptics_data *priv = psmouse->private;
1304         struct synaptics_hw_state hw;
1305         int num_fingers;
1306         int finger_width;
1307
1308         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1309                 return;
1310
1311         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1312                 synaptics_image_sensor_process(psmouse, &hw);
1313                 return;
1314         }
1315
1316         if (hw.scroll) {
1317                 priv->scroll += hw.scroll;
1318
1319                 while (priv->scroll >= 4) {
1320                         input_report_key(dev, BTN_BACK, !hw.down);
1321                         input_sync(dev);
1322                         input_report_key(dev, BTN_BACK, hw.down);
1323                         input_sync(dev);
1324                         priv->scroll -= 4;
1325                 }
1326                 while (priv->scroll <= -4) {
1327                         input_report_key(dev, BTN_FORWARD, !hw.up);
1328                         input_sync(dev);
1329                         input_report_key(dev, BTN_FORWARD, hw.up);
1330                         input_sync(dev);
1331                         priv->scroll += 4;
1332                 }
1333                 return;
1334         }
1335
1336         if (hw.z > 0 && hw.x > 1) {
1337                 num_fingers = 1;
1338                 finger_width = 5;
1339                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1340                         switch (hw.w) {
1341                         case 0 ... 1:
1342                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1343                                         num_fingers = hw.w + 2;
1344                                 break;
1345                         case 2:
1346                                 if (SYN_MODEL_PEN(priv->model_id))
1347                                         ;   /* Nothing, treat a pen as a single finger */
1348                                 break;
1349                         case 4 ... 15:
1350                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1351                                         finger_width = hw.w;
1352                                 break;
1353                         }
1354                 }
1355         } else {
1356                 num_fingers = 0;
1357                 finger_width = 0;
1358         }
1359
1360         if (cr48_profile_sensor) {
1361                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1362                 return;
1363         }
1364
1365         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1366                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1367                                               num_fingers);
1368
1369         /* Post events
1370          * BTN_TOUCH has to be first as mousedev relies on it when doing
1371          * absolute -> relative conversion
1372          */
1373         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1374         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1375
1376         if (num_fingers > 0) {
1377                 input_report_abs(dev, ABS_X, hw.x);
1378                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1379         }
1380         input_report_abs(dev, ABS_PRESSURE, hw.z);
1381
1382         if (SYN_CAP_PALMDETECT(priv->capabilities))
1383                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1384
1385         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1386         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1387                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1388                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1389         }
1390
1391         synaptics_report_buttons(psmouse, &hw);
1392
1393         input_sync(dev);
1394 }
1395
1396 static int synaptics_validate_byte(struct psmouse *psmouse,
1397                                    int idx, unsigned char pkt_type)
1398 {
1399         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1400         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1401         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1402         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1403         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1404         const char *packet = psmouse->packet;
1405
1406         if (idx < 0 || idx > 4)
1407                 return 0;
1408
1409         switch (pkt_type) {
1410
1411         case SYN_NEWABS:
1412         case SYN_NEWABS_RELAXED:
1413                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1414
1415         case SYN_NEWABS_STRICT:
1416                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1417
1418         case SYN_OLDABS:
1419                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1420
1421         default:
1422                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1423                 return 0;
1424         }
1425 }
1426
1427 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1428 {
1429         int i;
1430
1431         for (i = 0; i < 5; i++)
1432                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1433                         psmouse_info(psmouse, "using relaxed packet validation\n");
1434                         return SYN_NEWABS_RELAXED;
1435                 }
1436
1437         return SYN_NEWABS_STRICT;
1438 }
1439
1440 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1441 {
1442         struct synaptics_data *priv = psmouse->private;
1443
1444         if (psmouse->pktcnt >= 6) { /* Full packet received */
1445                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1446                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1447
1448                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1449                     synaptics_is_pt_packet(psmouse->packet)) {
1450                         if (priv->pt_port)
1451                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1452                 } else
1453                         synaptics_process_packet(psmouse);
1454
1455                 return PSMOUSE_FULL_PACKET;
1456         }
1457
1458         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1459                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1460 }
1461
1462 /*****************************************************************************
1463  *      Driver initialization/cleanup functions
1464  ****************************************************************************/
1465 static void set_abs_position_params(struct input_dev *dev,
1466                                     struct synaptics_data *priv, int x_code,
1467                                     int y_code)
1468 {
1469         int x_min = priv->x_min ?: XMIN_NOMINAL;
1470         int x_max = priv->x_max ?: XMAX_NOMINAL;
1471         int y_min = priv->y_min ?: YMIN_NOMINAL;
1472         int y_max = priv->y_max ?: YMAX_NOMINAL;
1473         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1474                         SYN_REDUCED_FILTER_FUZZ : 0;
1475
1476         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1477         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1478         input_abs_set_res(dev, x_code, priv->x_res);
1479         input_abs_set_res(dev, y_code, priv->y_res);
1480 }
1481
1482 static void set_input_params(struct psmouse *psmouse,
1483                              struct synaptics_data *priv)
1484 {
1485         struct input_dev *dev = psmouse->dev;
1486         int i;
1487
1488         /* Things that apply to both modes */
1489         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1490         __set_bit(EV_KEY, dev->evbit);
1491         __set_bit(BTN_LEFT, dev->keybit);
1492         __set_bit(BTN_RIGHT, dev->keybit);
1493
1494         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1495                 __set_bit(BTN_MIDDLE, dev->keybit);
1496
1497         if (!priv->absolute_mode) {
1498                 /* Relative mode */
1499                 __set_bit(EV_REL, dev->evbit);
1500                 __set_bit(REL_X, dev->relbit);
1501                 __set_bit(REL_Y, dev->relbit);
1502                 return;
1503         }
1504
1505         /* Absolute mode */
1506         __set_bit(EV_ABS, dev->evbit);
1507         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1508         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1509
1510         if (cr48_profile_sensor)
1511                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1512
1513         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1514                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1515                                         ABS_MT_POSITION_Y);
1516                 /* Image sensors can report per-contact pressure */
1517                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1518                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1519
1520                 /* Image sensors can signal 4 and 5 finger clicks */
1521                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1522                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1523         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1524                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1525                                         ABS_MT_POSITION_Y);
1526                 /*
1527                  * Profile sensor in CR-48 tracks contacts reasonably well,
1528                  * other non-image sensors with AGM use semi-mt.
1529                  */
1530                 input_mt_init_slots(dev, 2,
1531                                     INPUT_MT_POINTER |
1532                                     (cr48_profile_sensor ?
1533                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1534         }
1535
1536         if (SYN_CAP_PALMDETECT(priv->capabilities))
1537                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1538
1539         __set_bit(BTN_TOUCH, dev->keybit);
1540         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1541
1542         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1543                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1544                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1545         }
1546
1547         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1548             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1549                 __set_bit(BTN_FORWARD, dev->keybit);
1550                 __set_bit(BTN_BACK, dev->keybit);
1551         }
1552
1553         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1554                 __set_bit(BTN_0 + i, dev->keybit);
1555
1556         __clear_bit(EV_REL, dev->evbit);
1557         __clear_bit(REL_X, dev->relbit);
1558         __clear_bit(REL_Y, dev->relbit);
1559
1560         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1561                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1562                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1563                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1564                 /* Clickpads report only left button */
1565                 __clear_bit(BTN_RIGHT, dev->keybit);
1566                 __clear_bit(BTN_MIDDLE, dev->keybit);
1567         }
1568 }
1569
1570 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1571                                               void *data, char *buf)
1572 {
1573         struct synaptics_data *priv = psmouse->private;
1574
1575         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1576 }
1577
1578 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1579                                              void *data, const char *buf,
1580                                              size_t len)
1581 {
1582         struct synaptics_data *priv = psmouse->private;
1583         unsigned int value;
1584         int err;
1585
1586         err = kstrtouint(buf, 10, &value);
1587         if (err)
1588                 return err;
1589
1590         if (value > 1)
1591                 return -EINVAL;
1592
1593         if (value == priv->disable_gesture)
1594                 return len;
1595
1596         priv->disable_gesture = value;
1597         if (value)
1598                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1599         else
1600                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1601
1602         if (synaptics_mode_cmd(psmouse, priv->mode))
1603                 return -EIO;
1604
1605         return len;
1606 }
1607
1608 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1609                     synaptics_show_disable_gesture,
1610                     synaptics_set_disable_gesture);
1611
1612 static void synaptics_disconnect(struct psmouse *psmouse)
1613 {
1614         struct synaptics_data *priv = psmouse->private;
1615
1616         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1617                 device_remove_file(&psmouse->ps2dev.serio->dev,
1618                                    &psmouse_attr_disable_gesture.dattr);
1619
1620         synaptics_reset(psmouse);
1621         kfree(priv);
1622         psmouse->private = NULL;
1623 }
1624
1625 static int synaptics_reconnect(struct psmouse *psmouse)
1626 {
1627         struct synaptics_data *priv = psmouse->private;
1628         struct synaptics_data old_priv = *priv;
1629         unsigned char param[2];
1630         int retry = 0;
1631         int error;
1632
1633         do {
1634                 psmouse_reset(psmouse);
1635                 if (retry) {
1636                         /*
1637                          * On some boxes, right after resuming, the touchpad
1638                          * needs some time to finish initializing (I assume
1639                          * it needs time to calibrate) and start responding
1640                          * to Synaptics-specific queries, so let's wait a
1641                          * bit.
1642                          */
1643                         ssleep(1);
1644                 }
1645                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1646                 error = synaptics_detect(psmouse, 0);
1647         } while (error && ++retry < 3);
1648
1649         if (error)
1650                 return -1;
1651
1652         if (retry > 1)
1653                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1654
1655         if (synaptics_query_hardware(psmouse)) {
1656                 psmouse_err(psmouse, "Unable to query device.\n");
1657                 return -1;
1658         }
1659
1660         if (synaptics_set_mode(psmouse)) {
1661                 psmouse_err(psmouse, "Unable to initialize device.\n");
1662                 return -1;
1663         }
1664
1665         if (old_priv.identity != priv->identity ||
1666             old_priv.model_id != priv->model_id ||
1667             old_priv.capabilities != priv->capabilities ||
1668             old_priv.ext_cap != priv->ext_cap) {
1669                 psmouse_err(psmouse,
1670                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1671                             old_priv.identity, priv->identity,
1672                             old_priv.model_id, priv->model_id,
1673                             old_priv.capabilities, priv->capabilities,
1674                             old_priv.ext_cap, priv->ext_cap);
1675                 return -1;
1676         }
1677
1678         return 0;
1679 }
1680
1681 static bool impaired_toshiba_kbc;
1682
1683 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1684 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1685         {
1686                 /* Toshiba Satellite */
1687                 .matches = {
1688                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1689                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1690                 },
1691         },
1692         {
1693                 /* Toshiba Dynabook */
1694                 .matches = {
1695                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1696                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1697                 },
1698         },
1699         {
1700                 /* Toshiba Portege M300 */
1701                 .matches = {
1702                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1703                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1704                 },
1705
1706         },
1707         {
1708                 /* Toshiba Portege M300 */
1709                 .matches = {
1710                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1711                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1712                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1713                 },
1714
1715         },
1716 #endif
1717         { }
1718 };
1719
1720 static bool broken_olpc_ec;
1721
1722 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1723 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1724         {
1725                 /* OLPC XO-1 or XO-1.5 */
1726                 .matches = {
1727                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1728                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1729                 },
1730         },
1731 #endif
1732         { }
1733 };
1734
1735 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1736 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1737         {
1738                 /* Cr-48 Chromebook (Codename Mario) */
1739                 .matches = {
1740                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1741                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1742                 },
1743         },
1744 #endif
1745         { }
1746 };
1747
1748 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1749 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1750         {
1751                 .matches = {
1752                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1753                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1754                 },
1755         },
1756 #endif
1757         { }
1758 };
1759
1760 void __init synaptics_module_init(void)
1761 {
1762         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1763         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1764         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1765
1766         /*
1767          * Unfortunately ForcePad capability is not exported over PS/2,
1768          * so we have to resort to checking DMI.
1769          */
1770         is_forcepad = dmi_check_system(forcepad_dmi_table);
1771 }
1772
1773 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1774 {
1775         struct synaptics_data *priv;
1776         int err = -1;
1777
1778         /*
1779          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1780          * packet spew overloads the EC such that key presses on the keyboard
1781          * are missed.  Given that, don't even attempt to use Absolute mode.
1782          * Relative mode seems to work just fine.
1783          */
1784         if (absolute_mode && broken_olpc_ec) {
1785                 psmouse_info(psmouse,
1786                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1787                 return -ENODEV;
1788         }
1789
1790         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1791         if (!priv)
1792                 return -ENOMEM;
1793
1794         psmouse_reset(psmouse);
1795
1796         if (synaptics_query_hardware(psmouse)) {
1797                 psmouse_err(psmouse, "Unable to query device.\n");
1798                 goto init_fail;
1799         }
1800
1801         priv->absolute_mode = absolute_mode;
1802         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1803                 priv->disable_gesture = true;
1804
1805         if (synaptics_set_mode(psmouse)) {
1806                 psmouse_err(psmouse, "Unable to initialize device.\n");
1807                 goto init_fail;
1808         }
1809
1810         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1811
1812         psmouse_info(psmouse,
1813                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1814                      SYN_ID_MODEL(priv->identity),
1815                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1816                      priv->model_id,
1817                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1818                      priv->board_id, priv->firmware_id);
1819
1820         set_input_params(psmouse, priv);
1821
1822         /*
1823          * Encode touchpad model so that it can be used to set
1824          * input device->id.version and be visible to userspace.
1825          * Because version is __u16 we have to drop something.
1826          * Hardware info bits seem to be good candidates as they
1827          * are documented to be for Synaptics corp. internal use.
1828          */
1829         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1830                           (priv->model_id & 0x000000ff);
1831
1832         if (absolute_mode) {
1833                 psmouse->protocol_handler = synaptics_process_byte;
1834                 psmouse->pktsize = 6;
1835         } else {
1836                 /* Relative mode follows standard PS/2 mouse protocol */
1837                 psmouse->protocol_handler = psmouse_process_byte;
1838                 psmouse->pktsize = 3;
1839         }
1840
1841         psmouse->set_rate = synaptics_set_rate;
1842         psmouse->disconnect = synaptics_disconnect;
1843         psmouse->reconnect = synaptics_reconnect;
1844         psmouse->cleanup = synaptics_reset;
1845         /* Synaptics can usually stay in sync without extra help */
1846         psmouse->resync_time = 0;
1847
1848         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1849                 synaptics_pt_create(psmouse);
1850
1851         /*
1852          * Toshiba's KBC seems to have trouble handling data from
1853          * Synaptics at full rate.  Switch to a lower rate (roughly
1854          * the same rate as a standard PS/2 mouse).
1855          */
1856         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1857                 psmouse_info(psmouse,
1858                              "Toshiba %s detected, limiting rate to 40pps.\n",
1859                              dmi_get_system_info(DMI_PRODUCT_NAME));
1860                 psmouse->rate = 40;
1861         }
1862
1863         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1864                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1865                                          &psmouse_attr_disable_gesture.dattr);
1866                 if (err) {
1867                         psmouse_err(psmouse,
1868                                     "Failed to create disable_gesture attribute (%d)",
1869                                     err);
1870                         goto init_fail;
1871                 }
1872         }
1873
1874         return 0;
1875
1876  init_fail:
1877         kfree(priv);
1878         return err;
1879 }
1880
1881 int synaptics_init(struct psmouse *psmouse)
1882 {
1883         return __synaptics_init(psmouse, true);
1884 }
1885
1886 int synaptics_init_relative(struct psmouse *psmouse)
1887 {
1888         return __synaptics_init(psmouse, false);
1889 }
1890
1891 bool synaptics_supported(void)
1892 {
1893         return true;
1894 }
1895
1896 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1897
1898 void __init synaptics_module_init(void)
1899 {
1900 }
1901
1902 int synaptics_init(struct psmouse *psmouse)
1903 {
1904         return -ENOSYS;
1905 }
1906
1907 bool synaptics_supported(void)
1908 {
1909         return false;
1910 }
1911
1912 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */