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 /* maximum ABS_MT_POSITION displacement (in mm) */
  71 #define DMAX 10
  72
  73 /*****************************************************************************
  74  *      Stuff we need even when we do not want native Synaptics support
  75  ****************************************************************************/
  76
  77 /*
  78  * Set the synaptics touchpad mode byte by special commands
  79  */
  80 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  81 {
  82         unsigned char param[1];
  83
  84         if (psmouse_sliced_command(psmouse, mode))
  85                 return -1;
  86         param[0] = SYN_PS_SET_MODE2;
  87         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  88                 return -1;
  89         return 0;
  90 }
  91
  92 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  93 {
  94         struct ps2dev *ps2dev = &psmouse->ps2dev;
  95         unsigned char param[4];
  96
  97         param[0] = 0;
  98
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 101         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 104
 105         if (param[1] != 0x47)
 106                 return -ENODEV;
 107
 108         if (set_properties) {
 109                 psmouse->vendor = "Synaptics";
 110                 psmouse->name = "TouchPad";
 111         }
 112
 113         return 0;
 114 }
 115
 116 void synaptics_reset(struct psmouse *psmouse)
 117 {
 118         /* reset touchpad back to relative mode, gestures enabled */
 119         synaptics_mode_cmd(psmouse, 0);
 120 }
 121
 122 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 123
 124 static bool cr48_profile_sensor;
 125
 126 #define ANY_BOARD_ID 0
 127 struct min_max_quirk {
 128         const char * const *pnp_ids;
 129         struct {
 130                 unsigned long int min, max;
 131         } board_id;
 132         int x_min, x_max, y_min, y_max;
 133 };
 134
 135 static const struct min_max_quirk min_max_pnpid_table[] = {
 136         {
 137                 (const char * const []){"LEN0033", NULL},
 138                 {ANY_BOARD_ID, ANY_BOARD_ID},
 139                 1024, 5052, 2258, 4832
 140         },
 141         {
 142                 (const char * const []){"LEN0042", NULL},
 143                 {ANY_BOARD_ID, ANY_BOARD_ID},
 144                 1232, 5710, 1156, 4696
 145         },
 146         {
 147                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 148                                         "LEN0039", "LEN2002", "LEN2004",
 149                                         NULL},
 150                 {ANY_BOARD_ID, 2961},
 151                 1024, 5112, 2024, 4832
 152         },
 153         {
 154                 (const char * const []){"LEN2001", NULL},
 155                 {ANY_BOARD_ID, ANY_BOARD_ID},
 156                 1024, 5022, 2508, 4832
 157         },
 158         {
 159                 (const char * const []){"LEN2006", NULL},
 160                 {2691, 2691},
 161                 1024, 5045, 2457, 4832
 162         },
 163         {
 164                 (const char * const []){"LEN2006", NULL},
 165                 {ANY_BOARD_ID, ANY_BOARD_ID},
 166                 1264, 5675, 1171, 4688
 167         },
 168         { }
 169 };
 170
 171 /* This list has been kindly provided by Synaptics. */
 172 static const char * const topbuttonpad_pnp_ids[] = {
 173         "LEN0017",
 174         "LEN0018",
 175         "LEN0019",
 176         "LEN0023",
 177         "LEN002A",
 178         "LEN002B",
 179         "LEN002C",
 180         "LEN002D",
 181         "LEN002E",
 182         "LEN0033", /* Helix */
 183         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 184         "LEN0035", /* X240 */
 185         "LEN0036", /* T440 */
 186         "LEN0037", /* X1 Carbon 2nd */
 187         "LEN0038",
 188         "LEN0039", /* T440s */
 189         "LEN0041",
 190         "LEN0042", /* Yoga */
 191         "LEN0045",
 192         "LEN0047",
 193         "LEN0049",
 194         "LEN2000",
 195         "LEN2001", /* Edge E431 */
 196         "LEN2002", /* Edge E531 */
 197         "LEN2003",
 198         "LEN2004", /* L440 */
 199         "LEN2005",
 200         "LEN2006", /* Edge E440/E540 */
 201         "LEN2007",
 202         "LEN2008",
 203         "LEN2009",
 204         "LEN200A",
 205         "LEN200B",
 206         NULL
 207 };
 208
 209 /* This list has been kindly provided by Synaptics. */
 210 static const char * const forcepad_pnp_ids[] = {
 211         "SYN300D",
 212         "SYN3014",
 213         NULL
 214 };
 215
 216 /*****************************************************************************
 217  *      Synaptics communications functions
 218  ****************************************************************************/
 219
 220 /*
 221  * Synaptics touchpads report the y coordinate from bottom to top, which is
 222  * opposite from what userspace expects.
 223  * This function is used to invert y before reporting.
 224  */
 225 static int synaptics_invert_y(int y)
 226 {
 227         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 228 }
 229
 230 /*
 231  * Send a command to the synpatics touchpad by special commands
 232  */
 233 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 234 {
 235         if (psmouse_sliced_command(psmouse, c))
 236                 return -1;
 237         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 238                 return -1;
 239         return 0;
 240 }
 241
 242 /*
 243  * Read the model-id bytes from the touchpad
 244  * see also SYN_MODEL_* macros
 245  */
 246 static int synaptics_model_id(struct psmouse *psmouse)
 247 {
 248         struct synaptics_data *priv = psmouse->private;
 249         unsigned char mi[3];
 250
 251         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 252                 return -1;
 253         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 254         return 0;
 255 }
 256
 257 static int synaptics_more_extended_queries(struct psmouse *psmouse)
 258 {
 259         struct synaptics_data *priv = psmouse->private;
 260         unsigned char buf[3];
 261
 262         if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
 263                 return -1;
 264
 265         priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];
 266
 267         return 0;
 268 }
 269
 270 /*
 271  * Read the board id and the "More Extended Queries" from the touchpad
 272  * The board id is encoded in the "QUERY MODES" response
 273  */
 274 static int synaptics_query_modes(struct psmouse *psmouse)
 275 {
 276         struct synaptics_data *priv = psmouse->private;
 277         unsigned char bid[3];
 278
 279         /* firmwares prior 7.5 have no board_id encoded */
 280         if (SYN_ID_FULL(priv->identity) < 0x705)
 281                 return 0;
 282
 283         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 284                 return -1;
 285         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 286
 287         if (SYN_MEXT_CAP_BIT(bid[0]))
 288                 return synaptics_more_extended_queries(psmouse);
 289
 290         return 0;
 291 }
 292
 293 /*
 294  * Read the firmware id from the touchpad
 295  */
 296 static int synaptics_firmware_id(struct psmouse *psmouse)
 297 {
 298         struct synaptics_data *priv = psmouse->private;
 299         unsigned char fwid[3];
 300
 301         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 302                 return -1;
 303         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 304         return 0;
 305 }
 306
 307 /*
 308  * Read the capability-bits from the touchpad
 309  * see also the SYN_CAP_* macros
 310  */
 311 static int synaptics_capability(struct psmouse *psmouse)
 312 {
 313         struct synaptics_data *priv = psmouse->private;
 314         unsigned char cap[3];
 315
 316         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 317                 return -1;
 318         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 319         priv->ext_cap = priv->ext_cap_0c = 0;
 320
 321         /*
 322          * Older firmwares had submodel ID fixed to 0x47
 323          */
 324         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 325             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 326                 return -1;
 327         }
 328
 329         /*
 330          * Unless capExtended is set the rest of the flags should be ignored
 331          */
 332         if (!SYN_CAP_EXTENDED(priv->capabilities))
 333                 priv->capabilities = 0;
 334
 335         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 336                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 337                         psmouse_warn(psmouse,
 338                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 339                 } else {
 340                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 341
 342                         /*
 343                          * if nExtBtn is greater than 8 it should be considered
 344                          * invalid and treated as 0
 345                          */
 346                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 347                                 priv->ext_cap &= 0xff0fff;
 348                 }
 349         }
 350
 351         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 352                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 353                         psmouse_warn(psmouse,
 354                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 355                 } else {
 356                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 357                 }
 358         }
 359
 360         return 0;
 361 }
 362
 363 /*
 364  * Identify Touchpad
 365  * See also the SYN_ID_* macros
 366  */
 367 static int synaptics_identify(struct psmouse *psmouse)
 368 {
 369         struct synaptics_data *priv = psmouse->private;
 370         unsigned char id[3];
 371
 372         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 373                 return -1;
 374         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 375         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 376                 return 0;
 377         return -1;
 378 }
 379
 380 /*
 381  * Read touchpad resolution and maximum reported coordinates
 382  * Resolution is left zero if touchpad does not support the query
 383  */
 384
 385 static int synaptics_resolution(struct psmouse *psmouse)
 386 {
 387         struct synaptics_data *priv = psmouse->private;
 388         unsigned char resp[3];
 389
 390         if (SYN_ID_MAJOR(priv->identity) < 4)
 391                 return 0;
 392
 393         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 394                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 395                         priv->x_res = resp[0]; /* x resolution in units/mm */
 396                         priv->y_res = resp[2]; /* y resolution in units/mm */
 397                 }
 398         }
 399
 400         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 401             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 402                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 403                         psmouse_warn(psmouse,
 404                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 405                 } else {
 406                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 407                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 408                         psmouse_info(psmouse,
 409                                      "queried max coordinates: x [..%d], y [..%d]\n",
 410                                      priv->x_max, priv->y_max);
 411                 }
 412         }
 413
 414         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 415             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 416              /*
 417               * Firmware v8.1 does not report proper number of extended
 418               * capabilities, but has been proven to report correct min
 419               * coordinates.
 420               */
 421              SYN_ID_FULL(priv->identity) == 0x801)) {
 422                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 423                         psmouse_warn(psmouse,
 424                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 425                 } else {
 426                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 427                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 428                         psmouse_info(psmouse,
 429                                      "queried min coordinates: x [%d..], y [%d..]\n",
 430                                      priv->x_min, priv->y_min);
 431                 }
 432         }
 433
 434         return 0;
 435 }
 436
 437 /*
 438  * Apply quirk(s) if the hardware matches
 439  */
 440
 441 static void synaptics_apply_quirks(struct psmouse *psmouse)
 442 {
 443         struct synaptics_data *priv = psmouse->private;
 444         int i;
 445
 446         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 447                 if (!psmouse_matches_pnp_id(psmouse,
 448                                             min_max_pnpid_table[i].pnp_ids))
 449                         continue;
 450
 451                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 452                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 453                         continue;
 454
 455                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 456                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 457                         continue;
 458
 459                 priv->x_min = min_max_pnpid_table[i].x_min;
 460                 priv->x_max = min_max_pnpid_table[i].x_max;
 461                 priv->y_min = min_max_pnpid_table[i].y_min;
 462                 priv->y_max = min_max_pnpid_table[i].y_max;
 463                 psmouse_info(psmouse,
 464                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 465                              priv->x_min, priv->x_max,
 466                              priv->y_min, priv->y_max);
 467                 break;
 468         }
 469 }
 470
 471 static int synaptics_query_hardware(struct psmouse *psmouse)
 472 {
 473         if (synaptics_identify(psmouse))
 474                 return -1;
 475         if (synaptics_model_id(psmouse))
 476                 return -1;
 477         if (synaptics_firmware_id(psmouse))
 478                 return -1;
 479         if (synaptics_query_modes(psmouse))
 480                 return -1;
 481         if (synaptics_capability(psmouse))
 482                 return -1;
 483         if (synaptics_resolution(psmouse))
 484                 return -1;
 485
 486         synaptics_apply_quirks(psmouse);
 487
 488         return 0;
 489 }
 490
 491 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 492 {
 493         static unsigned char param = 0xc8;
 494         struct synaptics_data *priv = psmouse->private;
 495
 496         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 497               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 498                 return 0;
 499
 500         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 501                 return -1;
 502
 503         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 504                 return -1;
 505
 506         /* Advanced gesture mode also sends multi finger data */
 507         priv->capabilities |= BIT(1);
 508
 509         return 0;
 510 }
 511
 512 static int synaptics_set_mode(struct psmouse *psmouse)
 513 {
 514         struct synaptics_data *priv = psmouse->private;
 515
 516         priv->mode = 0;
 517         if (priv->absolute_mode)
 518                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 519         if (priv->disable_gesture)
 520                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 521         if (psmouse->rate >= 80)
 522                 priv->mode |= SYN_BIT_HIGH_RATE;
 523         if (SYN_CAP_EXTENDED(priv->capabilities))
 524                 priv->mode |= SYN_BIT_W_MODE;
 525
 526         if (synaptics_mode_cmd(psmouse, priv->mode))
 527                 return -1;
 528
 529         if (priv->absolute_mode &&
 530             synaptics_set_advanced_gesture_mode(psmouse)) {
 531                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 532                 return -1;
 533         }
 534
 535         return 0;
 536 }
 537
 538 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 539 {
 540         struct synaptics_data *priv = psmouse->private;
 541
 542         if (rate >= 80) {
 543                 priv->mode |= SYN_BIT_HIGH_RATE;
 544                 psmouse->rate = 80;
 545         } else {
 546                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 547                 psmouse->rate = 40;
 548         }
 549
 550         synaptics_mode_cmd(psmouse, priv->mode);
 551 }
 552
 553 /*****************************************************************************
 554  *      Synaptics pass-through PS/2 port support
 555  ****************************************************************************/
 556 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 557 {
 558         struct psmouse *parent = serio_get_drvdata(serio->parent);
 559         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 560
 561         if (psmouse_sliced_command(parent, c))
 562                 return -1;
 563         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 564                 return -1;
 565         return 0;
 566 }
 567
 568 static int synaptics_pt_start(struct serio *serio)
 569 {
 570         struct psmouse *parent = serio_get_drvdata(serio->parent);
 571         struct synaptics_data *priv = parent->private;
 572
 573         serio_pause_rx(parent->ps2dev.serio);
 574         priv->pt_port = serio;
 575         serio_continue_rx(parent->ps2dev.serio);
 576
 577         return 0;
 578 }
 579
 580 static void synaptics_pt_stop(struct serio *serio)
 581 {
 582         struct psmouse *parent = serio_get_drvdata(serio->parent);
 583         struct synaptics_data *priv = parent->private;
 584
 585         serio_pause_rx(parent->ps2dev.serio);
 586         priv->pt_port = NULL;
 587         serio_continue_rx(parent->ps2dev.serio);
 588 }
 589
 590 static int synaptics_is_pt_packet(unsigned char *buf)
 591 {
 592         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 593 }
 594
 595 static void synaptics_pass_pt_packet(struct psmouse *psmouse,
 596                                      struct serio *ptport,
 597                                      unsigned char *packet)
 598 {
 599         struct synaptics_data *priv = psmouse->private;
 600         struct psmouse *child = serio_get_drvdata(ptport);
 601
 602         if (child && child->state == PSMOUSE_ACTIVATED) {
 603                 serio_interrupt(ptport, packet[1] | priv->pt_buttons, 0);
 604                 serio_interrupt(ptport, packet[4], 0);
 605                 serio_interrupt(ptport, packet[5], 0);
 606                 if (child->pktsize == 4)
 607                         serio_interrupt(ptport, packet[2], 0);
 608         } else {
 609                 serio_interrupt(ptport, packet[1], 0);
 610         }
 611 }
 612
 613 static void synaptics_pt_activate(struct psmouse *psmouse)
 614 {
 615         struct synaptics_data *priv = psmouse->private;
 616         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 617
 618         /* adjust the touchpad to child's choice of protocol */
 619         if (child) {
 620                 if (child->pktsize == 4)
 621                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 622                 else
 623                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 624
 625                 if (synaptics_mode_cmd(psmouse, priv->mode))
 626                         psmouse_warn(psmouse,
 627                                      "failed to switch guest protocol\n");
 628         }
 629 }
 630
 631 static void synaptics_pt_create(struct psmouse *psmouse)
 632 {
 633         struct serio *serio;
 634
 635         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 636         if (!serio) {
 637                 psmouse_err(psmouse,
 638                             "not enough memory for pass-through port\n");
 639                 return;
 640         }
 641
 642         serio->id.type = SERIO_PS_PSTHRU;
 643         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 644         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 645         serio->write = synaptics_pt_write;
 646         serio->start = synaptics_pt_start;
 647         serio->stop = synaptics_pt_stop;
 648         serio->parent = psmouse->ps2dev.serio;
 649
 650         psmouse->pt_activate = synaptics_pt_activate;
 651
 652         psmouse_info(psmouse, "serio: %s port at %s\n",
 653                      serio->name, psmouse->phys);
 654         serio_register_port(serio);
 655 }
 656
 657 /*****************************************************************************
 658  *      Functions to interpret the absolute mode packets
 659  ****************************************************************************/
 660
 661 static void synaptics_parse_agm(const unsigned char buf[],
 662                                 struct synaptics_data *priv,
 663                                 struct synaptics_hw_state *hw)
 664 {
 665         struct synaptics_hw_state *agm = &priv->agm;
 666         int agm_packet_type;
 667
 668         agm_packet_type = (buf[5] & 0x30) >> 4;
 669         switch (agm_packet_type) {
 670         case 1:
 671                 /* Gesture packet: (x, y, z) half resolution */
 672                 agm->w = hw->w;
 673                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 674                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 675                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 676                 break;
 677
 678         case 2:
 679                 /* AGM-CONTACT packet: we are only interested in the count */
 680                 priv->agm_count = buf[1];
 681                 break;
 682
 683         default:
 684                 break;
 685         }
 686 }
 687
 688 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 689                                         struct synaptics_data *priv,
 690                                         struct synaptics_hw_state *hw)
 691 {
 692         unsigned int ext_bits =
 693                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 694         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 695
 696         hw->ext_buttons = buf[4] & ext_mask;
 697         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 698 }
 699
 700 static int synaptics_parse_hw_state(const unsigned char buf[],
 701                                     struct synaptics_data *priv,
 702                                     struct synaptics_hw_state *hw)
 703 {
 704         memset(hw, 0, sizeof(struct synaptics_hw_state));
 705
 706         if (SYN_MODEL_NEWABS(priv->model_id)) {
 707                 hw->w = (((buf[0] & 0x30) >> 2) |
 708                          ((buf[0] & 0x04) >> 1) |
 709                          ((buf[3] & 0x04) >> 2));
 710
 711                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 712                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 713                     hw->w == 2) {
 714                         synaptics_parse_agm(buf, priv, hw);
 715                         return 1;
 716                 }
 717
 718                 hw->x = (((buf[3] & 0x10) << 8) |
 719                          ((buf[1] & 0x0f) << 8) |
 720                          buf[4]);
 721                 hw->y = (((buf[3] & 0x20) << 7) |
 722                          ((buf[1] & 0xf0) << 4) |
 723                          buf[5]);
 724                 hw->z = buf[2];
 725
 726                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 727                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 728
 729                 if (priv->is_forcepad) {
 730                         /*
 731                          * ForcePads, like Clickpads, use middle button
 732                          * bits to report primary button clicks.
 733                          * Unfortunately they report primary button not
 734                          * only when user presses on the pad above certain
 735                          * threshold, but also when there are more than one
 736                          * finger on the touchpad, which interferes with
 737                          * out multi-finger gestures.
 738                          */
 739                         if (hw->z == 0) {
 740                                 /* No contacts */
 741                                 priv->press = priv->report_press = false;
 742                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 743                                 /*
 744                                  * Single-finger touch with pressure above
 745                                  * the threshold. If pressure stays long
 746                                  * enough, we'll start reporting primary
 747                                  * button. We rely on the device continuing
 748                                  * sending data even if finger does not
 749                                  * move.
 750                                  */
 751                                 if  (!priv->press) {
 752                                         priv->press_start = jiffies;
 753                                         priv->press = true;
 754                                 } else if (time_after(jiffies,
 755                                                 priv->press_start +
 756                                                         msecs_to_jiffies(50))) {
 757                                         priv->report_press = true;
 758                                 }
 759                         } else {
 760                                 priv->press = false;
 761                         }
 762
 763                         hw->left = priv->report_press;
 764
 765                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 766                         /*
 767                          * Clickpad's button is transmitted as middle button,
 768                          * however, since it is primary button, we will report
 769                          * it as BTN_LEFT.
 770                          */
 771                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 772
 773                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 774                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 775                         if (hw->w == 2)
 776                                 hw->scroll = (signed char)(buf[1]);
 777                 }
 778
 779                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 780                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 781                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 782                 }
 783
 784                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 785                     ((buf[0] ^ buf[3]) & 0x02)) {
 786                         synaptics_parse_ext_buttons(buf, priv, hw);
 787                 }
 788         } else {
 789                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 790                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 791
 792                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 793                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 794
 795                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 796                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 797         }
 798
 799         /*
 800          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 801          * is used by some firmware to indicate a finger at the edge of
 802          * the touchpad whose precise position cannot be determined, so
 803          * convert these values to the maximum axis value.
 804          */
 805         if (hw->x > X_MAX_POSITIVE)
 806                 hw->x -= 1 << ABS_POS_BITS;
 807         else if (hw->x == X_MAX_POSITIVE)
 808                 hw->x = XMAX;
 809
 810         if (hw->y > Y_MAX_POSITIVE)
 811                 hw->y -= 1 << ABS_POS_BITS;
 812         else if (hw->y == Y_MAX_POSITIVE)
 813                 hw->y = YMAX;
 814
 815         return 0;
 816 }
 817
 818 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 819                                           bool active, int x, int y)
 820 {
 821         input_mt_slot(dev, slot);
 822         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 823         if (active) {
 824                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 825                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 826         }
 827 }
 828
 829 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 830                                           const struct synaptics_hw_state *a,
 831                                           const struct synaptics_hw_state *b,
 832                                           int num_fingers)
 833 {
 834         if (num_fingers >= 2) {
 835                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 836                                               min(a->y, b->y));
 837                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 838                                               max(a->y, b->y));
 839         } else if (num_fingers == 1) {
 840                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 841                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 842         } else {
 843                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 844                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 845         }
 846 }
 847
 848 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 849                                          const struct synaptics_hw_state *hw)
 850 {
 851         struct input_dev *dev = psmouse->dev;
 852         struct synaptics_data *priv = psmouse->private;
 853         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 854         char buf[6] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 855         int i;
 856
 857         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 858                 return;
 859
 860         /* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
 861         if (SYN_ID_FULL(priv->identity) == 0x801 &&
 862             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 863                 return;
 864
 865         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10)) {
 866                 for (i = 0; i < ext_bits; i++) {
 867                         input_report_key(dev, BTN_0 + 2 * i,
 868                                 hw->ext_buttons & (1 << i));
 869                         input_report_key(dev, BTN_1 + 2 * i,
 870                                 hw->ext_buttons & (1 << (i + ext_bits)));
 871                 }
 872                 return;
 873         }
 874
 875         /*
 876          * This generation of touchpads has the trackstick buttons
 877          * physically wired to the touchpad. Re-route them through
 878          * the pass-through interface.
 879          */
 880         if (!priv->pt_port)
 881                 return;
 882
 883         /* The trackstick expects at most 3 buttons */
 884         priv->pt_buttons = SYN_CAP_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 885                            SYN_CAP_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 886                            SYN_CAP_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 887
 888         synaptics_pass_pt_packet(psmouse, priv->pt_port, buf);
 889 }
 890
 891 static void synaptics_report_buttons(struct psmouse *psmouse,
 892                                      const struct synaptics_hw_state *hw)
 893 {
 894         struct input_dev *dev = psmouse->dev;
 895         struct synaptics_data *priv = psmouse->private;
 896
 897         input_report_key(dev, BTN_LEFT, hw->left);
 898         input_report_key(dev, BTN_RIGHT, hw->right);
 899
 900         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 901                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 902
 903         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 904                 input_report_key(dev, BTN_FORWARD, hw->up);
 905                 input_report_key(dev, BTN_BACK, hw->down);
 906         }
 907
 908         synaptics_report_ext_buttons(psmouse, hw);
 909 }
 910
 911 static void synaptics_report_mt_data(struct psmouse *psmouse,
 912                                      const struct synaptics_hw_state *sgm,
 913                                      int num_fingers)
 914 {
 915         struct input_dev *dev = psmouse->dev;
 916         struct synaptics_data *priv = psmouse->private;
 917         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 918         struct input_mt_pos pos[2];
 919         int slot[2], nsemi, i;
 920
 921         nsemi = clamp_val(num_fingers, 0, 2);
 922
 923         for (i = 0; i < nsemi; i++) {
 924                 pos[i].x = hw[i]->x;
 925                 pos[i].y = synaptics_invert_y(hw[i]->y);
 926         }
 927
 928         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->x_res);
 929
 930         for (i = 0; i < nsemi; i++) {
 931                 input_mt_slot(dev, slot[i]);
 932                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 933                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 934                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 935                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 936         }
 937
 938         input_mt_drop_unused(dev);
 939
 940         /* Don't use active slot count to generate BTN_TOOL events. */
 941         input_mt_report_pointer_emulation(dev, false);
 942
 943         /* Send the number of fingers reported by touchpad itself. */
 944         input_mt_report_finger_count(dev, num_fingers);
 945
 946         synaptics_report_buttons(psmouse, sgm);
 947
 948         input_sync(dev);
 949 }
 950
 951 static void synaptics_image_sensor_process(struct psmouse *psmouse,
 952                                            struct synaptics_hw_state *sgm)
 953 {
 954         struct synaptics_data *priv = psmouse->private;
 955         int num_fingers;
 956
 957         /*
 958          * Update mt_state using the new finger count and current mt_state.
 959          */
 960         if (sgm->z == 0)
 961                 num_fingers = 0;
 962         else if (sgm->w >= 4)
 963                 num_fingers = 1;
 964         else if (sgm->w == 0)
 965                 num_fingers = 2;
 966         else if (sgm->w == 1)
 967                 num_fingers = priv->agm_count ? priv->agm_count : 3;
 968         else
 969                 num_fingers = 4;
 970
 971         /* Send resulting input events to user space */
 972         synaptics_report_mt_data(psmouse, sgm, num_fingers);
 973 }
 974
 975 /*
 976  *  called for each full received packet from the touchpad
 977  */
 978 static void synaptics_process_packet(struct psmouse *psmouse)
 979 {
 980         struct input_dev *dev = psmouse->dev;
 981         struct synaptics_data *priv = psmouse->private;
 982         struct synaptics_hw_state hw;
 983         int num_fingers;
 984         int finger_width;
 985
 986         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 987                 return;
 988
 989         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 990                 synaptics_image_sensor_process(psmouse, &hw);
 991                 return;
 992         }
 993
 994         if (hw.scroll) {
 995                 priv->scroll += hw.scroll;
 996
 997                 while (priv->scroll >= 4) {
 998                         input_report_key(dev, BTN_BACK, !hw.down);
 999                         input_sync(dev);
1000                         input_report_key(dev, BTN_BACK, hw.down);
1001                         input_sync(dev);
1002                         priv->scroll -= 4;
1003                 }
1004                 while (priv->scroll <= -4) {
1005                         input_report_key(dev, BTN_FORWARD, !hw.up);
1006                         input_sync(dev);
1007                         input_report_key(dev, BTN_FORWARD, hw.up);
1008                         input_sync(dev);
1009                         priv->scroll += 4;
1010                 }
1011                 return;
1012         }
1013
1014         if (hw.z > 0 && hw.x > 1) {
1015                 num_fingers = 1;
1016                 finger_width = 5;
1017                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1018                         switch (hw.w) {
1019                         case 0 ... 1:
1020                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1021                                         num_fingers = hw.w + 2;
1022                                 break;
1023                         case 2:
1024                                 if (SYN_MODEL_PEN(priv->model_id))
1025                                         ;   /* Nothing, treat a pen as a single finger */
1026                                 break;
1027                         case 4 ... 15:
1028                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1029                                         finger_width = hw.w;
1030                                 break;
1031                         }
1032                 }
1033         } else {
1034                 num_fingers = 0;
1035                 finger_width = 0;
1036         }
1037
1038         if (cr48_profile_sensor) {
1039                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1040                 return;
1041         }
1042
1043         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1044                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1045                                               num_fingers);
1046
1047         /* Post events
1048          * BTN_TOUCH has to be first as mousedev relies on it when doing
1049          * absolute -> relative conversion
1050          */
1051         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1052         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1053
1054         if (num_fingers > 0) {
1055                 input_report_abs(dev, ABS_X, hw.x);
1056                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1057         }
1058         input_report_abs(dev, ABS_PRESSURE, hw.z);
1059
1060         if (SYN_CAP_PALMDETECT(priv->capabilities))
1061                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1062
1063         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1064         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1065                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1066                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1067         }
1068
1069         synaptics_report_buttons(psmouse, &hw);
1070
1071         input_sync(dev);
1072 }
1073
1074 static int synaptics_validate_byte(struct psmouse *psmouse,
1075                                    int idx, unsigned char pkt_type)
1076 {
1077         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1078         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1079         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1080         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1081         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1082         const char *packet = psmouse->packet;
1083
1084         if (idx < 0 || idx > 4)
1085                 return 0;
1086
1087         switch (pkt_type) {
1088
1089         case SYN_NEWABS:
1090         case SYN_NEWABS_RELAXED:
1091                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1092
1093         case SYN_NEWABS_STRICT:
1094                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1095
1096         case SYN_OLDABS:
1097                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1098
1099         default:
1100                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1101                 return 0;
1102         }
1103 }
1104
1105 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1106 {
1107         int i;
1108
1109         for (i = 0; i < 5; i++)
1110                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1111                         psmouse_info(psmouse, "using relaxed packet validation\n");
1112                         return SYN_NEWABS_RELAXED;
1113                 }
1114
1115         return SYN_NEWABS_STRICT;
1116 }
1117
1118 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1119 {
1120         struct synaptics_data *priv = psmouse->private;
1121
1122         if (psmouse->pktcnt >= 6) { /* Full packet received */
1123                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1124                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1125
1126                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1127                     synaptics_is_pt_packet(psmouse->packet)) {
1128                         if (priv->pt_port)
1129                                 synaptics_pass_pt_packet(psmouse, priv->pt_port,
1130                                                          psmouse->packet);
1131                 } else
1132                         synaptics_process_packet(psmouse);
1133
1134                 return PSMOUSE_FULL_PACKET;
1135         }
1136
1137         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1138                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1139 }
1140
1141 /*****************************************************************************
1142  *      Driver initialization/cleanup functions
1143  ****************************************************************************/
1144 static void set_abs_position_params(struct input_dev *dev,
1145                                     struct synaptics_data *priv, int x_code,
1146                                     int y_code)
1147 {
1148         int x_min = priv->x_min ?: XMIN_NOMINAL;
1149         int x_max = priv->x_max ?: XMAX_NOMINAL;
1150         int y_min = priv->y_min ?: YMIN_NOMINAL;
1151         int y_max = priv->y_max ?: YMAX_NOMINAL;
1152         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1153                         SYN_REDUCED_FILTER_FUZZ : 0;
1154
1155         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1156         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1157         input_abs_set_res(dev, x_code, priv->x_res);
1158         input_abs_set_res(dev, y_code, priv->y_res);
1159 }
1160
1161 static void set_input_params(struct psmouse *psmouse,
1162                              struct synaptics_data *priv)
1163 {
1164         struct input_dev *dev = psmouse->dev;
1165         int i;
1166
1167         /* Things that apply to both modes */
1168         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1169         __set_bit(EV_KEY, dev->evbit);
1170         __set_bit(BTN_LEFT, dev->keybit);
1171         __set_bit(BTN_RIGHT, dev->keybit);
1172
1173         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1174                 __set_bit(BTN_MIDDLE, dev->keybit);
1175
1176         if (!priv->absolute_mode) {
1177                 /* Relative mode */
1178                 __set_bit(EV_REL, dev->evbit);
1179                 __set_bit(REL_X, dev->relbit);
1180                 __set_bit(REL_Y, dev->relbit);
1181                 return;
1182         }
1183
1184         /* Absolute mode */
1185         __set_bit(EV_ABS, dev->evbit);
1186         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1187         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1188
1189         if (cr48_profile_sensor)
1190                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1191
1192         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1193                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1194                                         ABS_MT_POSITION_Y);
1195                 /* Image sensors can report per-contact pressure */
1196                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1197                 input_mt_init_slots(dev, 3, INPUT_MT_POINTER | INPUT_MT_TRACK);
1198
1199                 /* Image sensors can signal 4 and 5 finger clicks */
1200                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1201                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1202         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1203                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1204                                         ABS_MT_POSITION_Y);
1205                 /*
1206                  * Profile sensor in CR-48 tracks contacts reasonably well,
1207                  * other non-image sensors with AGM use semi-mt.
1208                  */
1209                 input_mt_init_slots(dev, 2,
1210                                     INPUT_MT_POINTER |
1211                                     (cr48_profile_sensor ?
1212                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1213         }
1214
1215         if (SYN_CAP_PALMDETECT(priv->capabilities))
1216                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1217
1218         __set_bit(BTN_TOUCH, dev->keybit);
1219         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1220
1221         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1222                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1223                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1224         }
1225
1226         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1227             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1228                 __set_bit(BTN_FORWARD, dev->keybit);
1229                 __set_bit(BTN_BACK, dev->keybit);
1230         }
1231
1232         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1233                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1234                         __set_bit(BTN_0 + i, dev->keybit);
1235
1236         __clear_bit(EV_REL, dev->evbit);
1237         __clear_bit(REL_X, dev->relbit);
1238         __clear_bit(REL_Y, dev->relbit);
1239
1240         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1241                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1242                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1243                     !SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1244                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1245                 /* Clickpads report only left button */
1246                 __clear_bit(BTN_RIGHT, dev->keybit);
1247                 __clear_bit(BTN_MIDDLE, dev->keybit);
1248         }
1249 }
1250
1251 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1252                                               void *data, char *buf)
1253 {
1254         struct synaptics_data *priv = psmouse->private;
1255
1256         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1257 }
1258
1259 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1260                                              void *data, const char *buf,
1261                                              size_t len)
1262 {
1263         struct synaptics_data *priv = psmouse->private;
1264         unsigned int value;
1265         int err;
1266
1267         err = kstrtouint(buf, 10, &value);
1268         if (err)
1269                 return err;
1270
1271         if (value > 1)
1272                 return -EINVAL;
1273
1274         if (value == priv->disable_gesture)
1275                 return len;
1276
1277         priv->disable_gesture = value;
1278         if (value)
1279                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1280         else
1281                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1282
1283         if (synaptics_mode_cmd(psmouse, priv->mode))
1284                 return -EIO;
1285
1286         return len;
1287 }
1288
1289 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1290                     synaptics_show_disable_gesture,
1291                     synaptics_set_disable_gesture);
1292
1293 static void synaptics_disconnect(struct psmouse *psmouse)
1294 {
1295         struct synaptics_data *priv = psmouse->private;
1296
1297         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1298                 device_remove_file(&psmouse->ps2dev.serio->dev,
1299                                    &psmouse_attr_disable_gesture.dattr);
1300
1301         synaptics_reset(psmouse);
1302         kfree(priv);
1303         psmouse->private = NULL;
1304 }
1305
1306 static int synaptics_reconnect(struct psmouse *psmouse)
1307 {
1308         struct synaptics_data *priv = psmouse->private;
1309         struct synaptics_data old_priv = *priv;
1310         unsigned char param[2];
1311         int retry = 0;
1312         int error;
1313
1314         do {
1315                 psmouse_reset(psmouse);
1316                 if (retry) {
1317                         /*
1318                          * On some boxes, right after resuming, the touchpad
1319                          * needs some time to finish initializing (I assume
1320                          * it needs time to calibrate) and start responding
1321                          * to Synaptics-specific queries, so let's wait a
1322                          * bit.
1323                          */
1324                         ssleep(1);
1325                 }
1326                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1327                 error = synaptics_detect(psmouse, 0);
1328         } while (error && ++retry < 3);
1329
1330         if (error)
1331                 return -1;
1332
1333         if (retry > 1)
1334                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1335
1336         if (synaptics_query_hardware(psmouse)) {
1337                 psmouse_err(psmouse, "Unable to query device.\n");
1338                 return -1;
1339         }
1340
1341         if (synaptics_set_mode(psmouse)) {
1342                 psmouse_err(psmouse, "Unable to initialize device.\n");
1343                 return -1;
1344         }
1345
1346         if (old_priv.identity != priv->identity ||
1347             old_priv.model_id != priv->model_id ||
1348             old_priv.capabilities != priv->capabilities ||
1349             old_priv.ext_cap != priv->ext_cap) {
1350                 psmouse_err(psmouse,
1351                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1352                             old_priv.identity, priv->identity,
1353                             old_priv.model_id, priv->model_id,
1354                             old_priv.capabilities, priv->capabilities,
1355                             old_priv.ext_cap, priv->ext_cap);
1356                 return -1;
1357         }
1358
1359         return 0;
1360 }
1361
1362 static bool impaired_toshiba_kbc;
1363
1364 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1365 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1366         {
1367                 /* Toshiba Satellite */
1368                 .matches = {
1369                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1370                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1371                 },
1372         },
1373         {
1374                 /* Toshiba Dynabook */
1375                 .matches = {
1376                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1377                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1378                 },
1379         },
1380         {
1381                 /* Toshiba Portege M300 */
1382                 .matches = {
1383                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1384                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1385                 },
1386
1387         },
1388         {
1389                 /* Toshiba Portege M300 */
1390                 .matches = {
1391                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1392                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1393                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1394                 },
1395
1396         },
1397 #endif
1398         { }
1399 };
1400
1401 static bool broken_olpc_ec;
1402
1403 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1404 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1405         {
1406                 /* OLPC XO-1 or XO-1.5 */
1407                 .matches = {
1408                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1409                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1410                 },
1411         },
1412 #endif
1413         { }
1414 };
1415
1416 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1417 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1418         {
1419                 /* Cr-48 Chromebook (Codename Mario) */
1420                 .matches = {
1421                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1422                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1423                 },
1424         },
1425 #endif
1426         { }
1427 };
1428
1429 void __init synaptics_module_init(void)
1430 {
1431         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1432         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1433         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1434 }
1435
1436 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1437 {
1438         struct synaptics_data *priv;
1439         int err = -1;
1440
1441         /*
1442          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1443          * packet spew overloads the EC such that key presses on the keyboard
1444          * are missed.  Given that, don't even attempt to use Absolute mode.
1445          * Relative mode seems to work just fine.
1446          */
1447         if (absolute_mode && broken_olpc_ec) {
1448                 psmouse_info(psmouse,
1449                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1450                 return -ENODEV;
1451         }
1452
1453         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1454         if (!priv)
1455                 return -ENOMEM;
1456
1457         psmouse_reset(psmouse);
1458
1459         if (synaptics_query_hardware(psmouse)) {
1460                 psmouse_err(psmouse, "Unable to query device.\n");
1461                 goto init_fail;
1462         }
1463
1464         priv->absolute_mode = absolute_mode;
1465         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1466                 priv->disable_gesture = true;
1467
1468         /*
1469          * Unfortunately ForcePad capability is not exported over PS/2,
1470          * so we have to resort to checking PNP IDs.
1471          */
1472         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1473
1474         if (synaptics_set_mode(psmouse)) {
1475                 psmouse_err(psmouse, "Unable to initialize device.\n");
1476                 goto init_fail;
1477         }
1478
1479         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1480
1481         psmouse_info(psmouse,
1482                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1483                      SYN_ID_MODEL(priv->identity),
1484                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1485                      priv->model_id,
1486                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1487                      priv->board_id, priv->firmware_id);
1488
1489         set_input_params(psmouse, priv);
1490
1491         /*
1492          * Encode touchpad model so that it can be used to set
1493          * input device->id.version and be visible to userspace.
1494          * Because version is __u16 we have to drop something.
1495          * Hardware info bits seem to be good candidates as they
1496          * are documented to be for Synaptics corp. internal use.
1497          */
1498         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1499                           (priv->model_id & 0x000000ff);
1500
1501         if (absolute_mode) {
1502                 psmouse->protocol_handler = synaptics_process_byte;
1503                 psmouse->pktsize = 6;
1504         } else {
1505                 /* Relative mode follows standard PS/2 mouse protocol */
1506                 psmouse->protocol_handler = psmouse_process_byte;
1507                 psmouse->pktsize = 3;
1508         }
1509
1510         psmouse->set_rate = synaptics_set_rate;
1511         psmouse->disconnect = synaptics_disconnect;
1512         psmouse->reconnect = synaptics_reconnect;
1513         psmouse->cleanup = synaptics_reset;
1514         /* Synaptics can usually stay in sync without extra help */
1515         psmouse->resync_time = 0;
1516
1517         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1518                 synaptics_pt_create(psmouse);
1519
1520         /*
1521          * Toshiba's KBC seems to have trouble handling data from
1522          * Synaptics at full rate.  Switch to a lower rate (roughly
1523          * the same rate as a standard PS/2 mouse).
1524          */
1525         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1526                 psmouse_info(psmouse,
1527                              "Toshiba %s detected, limiting rate to 40pps.\n",
1528                              dmi_get_system_info(DMI_PRODUCT_NAME));
1529                 psmouse->rate = 40;
1530         }
1531
1532         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1533                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1534                                          &psmouse_attr_disable_gesture.dattr);
1535                 if (err) {
1536                         psmouse_err(psmouse,
1537                                     "Failed to create disable_gesture attribute (%d)",
1538                                     err);
1539                         goto init_fail;
1540                 }
1541         }
1542
1543         return 0;
1544
1545  init_fail:
1546         kfree(priv);
1547         return err;
1548 }
1549
1550 int synaptics_init(struct psmouse *psmouse)
1551 {
1552         return __synaptics_init(psmouse, true);
1553 }
1554
1555 int synaptics_init_relative(struct psmouse *psmouse)
1556 {
1557         return __synaptics_init(psmouse, false);
1558 }
1559
1560 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1561
1562 void __init synaptics_module_init(void)
1563 {
1564 }
1565
1566 int synaptics_init(struct psmouse *psmouse)
1567 {
1568         return -ENOSYS;
1569 }
1570
1571 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */