drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /*****************************************************************************
  71  *      Stuff we need even when we do not want native Synaptics support
  72  ****************************************************************************/
  73
  74 /*
  75  * Set the synaptics touchpad mode byte by special commands
  76  */
  77 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  78 {
  79         unsigned char param[1];
  80
  81         if (psmouse_sliced_command(psmouse, mode))
  82                 return -1;
  83         param[0] = SYN_PS_SET_MODE2;
  84         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  85                 return -1;
  86         return 0;
  87 }
  88
  89 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  90 {
  91         struct ps2dev *ps2dev = &psmouse->ps2dev;
  92         unsigned char param[4];
  93
  94         param[0] = 0;
  95
  96         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  97         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  98         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 101
 102         if (param[1] != 0x47)
 103                 return -ENODEV;
 104
 105         if (set_properties) {
 106                 psmouse->vendor = "Synaptics";
 107                 psmouse->name = "TouchPad";
 108         }
 109
 110         return 0;
 111 }
 112
 113 void synaptics_reset(struct psmouse *psmouse)
 114 {
 115         /* reset touchpad back to relative mode, gestures enabled */
 116         synaptics_mode_cmd(psmouse, 0);
 117 }
 118
 119 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 120
 121 static bool cr48_profile_sensor;
 122
 123 #define ANY_BOARD_ID 0
 124 struct min_max_quirk {
 125         const char * const *pnp_ids;
 126         struct {
 127                 unsigned long int min, max;
 128         } board_id;
 129         int x_min, x_max, y_min, y_max;
 130 };
 131
 132 static const struct min_max_quirk min_max_pnpid_table[] = {
 133         {
 134                 (const char * const []){"LEN0033", NULL},
 135                 {ANY_BOARD_ID, ANY_BOARD_ID},
 136                 1024, 5052, 2258, 4832
 137         },
 138         {
 139                 (const char * const []){"LEN0042", NULL},
 140                 {ANY_BOARD_ID, ANY_BOARD_ID},
 141                 1232, 5710, 1156, 4696
 142         },
 143         {
 144                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 145                                         "LEN0039", "LEN2002", "LEN2004",
 146                                         NULL},
 147                 {ANY_BOARD_ID, 2961},
 148                 1024, 5112, 2024, 4832
 149         },
 150         {
 151                 (const char * const []){"LEN2001", NULL},
 152                 {ANY_BOARD_ID, ANY_BOARD_ID},
 153                 1024, 5022, 2508, 4832
 154         },
 155         {
 156                 (const char * const []){"LEN2006", NULL},
 157                 {ANY_BOARD_ID, ANY_BOARD_ID},
 158                 1264, 5675, 1171, 4688
 159         },
 160         { }
 161 };
 162
 163 /* This list has been kindly provided by Synaptics. */
 164 static const char * const topbuttonpad_pnp_ids[] = {
 165         "LEN0017",
 166         "LEN0018",
 167         "LEN0019",
 168         "LEN0023",
 169         "LEN002A",
 170         "LEN002B",
 171         "LEN002C",
 172         "LEN002D",
 173         "LEN002E",
 174         "LEN0033", /* Helix */
 175         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 176         "LEN0035", /* X240 */
 177         "LEN0036", /* T440 */
 178         "LEN0037", /* X1 Carbon 2nd */
 179         "LEN0038",
 180         "LEN0039", /* T440s */
 181         "LEN0041",
 182         "LEN0042", /* Yoga */
 183         "LEN0045",
 184         "LEN0046",
 185         "LEN0047",
 186         "LEN0048",
 187         "LEN0049",
 188         "LEN2000",
 189         "LEN2001", /* Edge E431 */
 190         "LEN2002", /* Edge E531 */
 191         "LEN2003",
 192         "LEN2004", /* L440 */
 193         "LEN2005",
 194         "LEN2006",
 195         "LEN2007",
 196         "LEN2008",
 197         "LEN2009",
 198         "LEN200A",
 199         "LEN200B",
 200         NULL
 201 };
 202
 203 /*****************************************************************************
 204  *      Synaptics communications functions
 205  ****************************************************************************/
 206
 207 /*
 208  * Synaptics touchpads report the y coordinate from bottom to top, which is
 209  * opposite from what userspace expects.
 210  * This function is used to invert y before reporting.
 211  */
 212 static int synaptics_invert_y(int y)
 213 {
 214         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 215 }
 216
 217 /*
 218  * Send a command to the synpatics touchpad by special commands
 219  */
 220 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 221 {
 222         if (psmouse_sliced_command(psmouse, c))
 223                 return -1;
 224         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 225                 return -1;
 226         return 0;
 227 }
 228
 229 /*
 230  * Read the model-id bytes from the touchpad
 231  * see also SYN_MODEL_* macros
 232  */
 233 static int synaptics_model_id(struct psmouse *psmouse)
 234 {
 235         struct synaptics_data *priv = psmouse->private;
 236         unsigned char mi[3];
 237
 238         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 239                 return -1;
 240         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 241         return 0;
 242 }
 243
 244 static int synaptics_more_extended_queries(struct psmouse *psmouse)
 245 {
 246         struct synaptics_data *priv = psmouse->private;
 247         unsigned char buf[3];
 248
 249         if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
 250                 return -1;
 251
 252         priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];
 253
 254         return 0;
 255 }
 256
 257 /*
 258  * Read the board id and the "More Extended Queries" from the touchpad
 259  * The board id is encoded in the "QUERY MODES" response
 260  */
 261 static int synaptics_query_modes(struct psmouse *psmouse)
 262 {
 263         struct synaptics_data *priv = psmouse->private;
 264         unsigned char bid[3];
 265
 266         /* firmwares prior 7.5 have no board_id encoded */
 267         if (SYN_ID_FULL(priv->identity) < 0x705)
 268                 return 0;
 269
 270         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 271                 return -1;
 272         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 273
 274         if (SYN_MEXT_CAP_BIT(bid[0]))
 275                 return synaptics_more_extended_queries(psmouse);
 276
 277         return 0;
 278 }
 279
 280 /*
 281  * Read the firmware id from the touchpad
 282  */
 283 static int synaptics_firmware_id(struct psmouse *psmouse)
 284 {
 285         struct synaptics_data *priv = psmouse->private;
 286         unsigned char fwid[3];
 287
 288         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 289                 return -1;
 290         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 291         return 0;
 292 }
 293
 294 /*
 295  * Read the capability-bits from the touchpad
 296  * see also the SYN_CAP_* macros
 297  */
 298 static int synaptics_capability(struct psmouse *psmouse)
 299 {
 300         struct synaptics_data *priv = psmouse->private;
 301         unsigned char cap[3];
 302
 303         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 304                 return -1;
 305         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 306         priv->ext_cap = priv->ext_cap_0c = 0;
 307
 308         /*
 309          * Older firmwares had submodel ID fixed to 0x47
 310          */
 311         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 312             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 313                 return -1;
 314         }
 315
 316         /*
 317          * Unless capExtended is set the rest of the flags should be ignored
 318          */
 319         if (!SYN_CAP_EXTENDED(priv->capabilities))
 320                 priv->capabilities = 0;
 321
 322         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 323                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 324                         psmouse_warn(psmouse,
 325                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 326                 } else {
 327                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 328
 329                         /*
 330                          * if nExtBtn is greater than 8 it should be considered
 331                          * invalid and treated as 0
 332                          */
 333                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 334                                 priv->ext_cap &= 0xff0fff;
 335                 }
 336         }
 337
 338         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 339                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 340                         psmouse_warn(psmouse,
 341                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 342                 } else {
 343                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 344                 }
 345         }
 346
 347         return 0;
 348 }
 349
 350 /*
 351  * Identify Touchpad
 352  * See also the SYN_ID_* macros
 353  */
 354 static int synaptics_identify(struct psmouse *psmouse)
 355 {
 356         struct synaptics_data *priv = psmouse->private;
 357         unsigned char id[3];
 358
 359         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 360                 return -1;
 361         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 362         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 363                 return 0;
 364         return -1;
 365 }
 366
 367 /*
 368  * Read touchpad resolution and maximum reported coordinates
 369  * Resolution is left zero if touchpad does not support the query
 370  */
 371
 372 static int synaptics_resolution(struct psmouse *psmouse)
 373 {
 374         struct synaptics_data *priv = psmouse->private;
 375         unsigned char resp[3];
 376
 377         if (SYN_ID_MAJOR(priv->identity) < 4)
 378                 return 0;
 379
 380         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 381                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 382                         priv->x_res = resp[0]; /* x resolution in units/mm */
 383                         priv->y_res = resp[2]; /* y resolution in units/mm */
 384                 }
 385         }
 386
 387         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 388             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 389                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 390                         psmouse_warn(psmouse,
 391                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 392                 } else {
 393                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 394                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 395                         psmouse_info(psmouse,
 396                                      "queried max coordinates: x [..%d], y [..%d]\n",
 397                                      priv->x_max, priv->y_max);
 398                 }
 399         }
 400
 401         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 402             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 403              /*
 404               * Firmware v8.1 does not report proper number of extended
 405               * capabilities, but has been proven to report correct min
 406               * coordinates.
 407               */
 408              SYN_ID_FULL(priv->identity) == 0x801)) {
 409                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 410                         psmouse_warn(psmouse,
 411                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 412                 } else {
 413                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 414                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 415                         psmouse_info(psmouse,
 416                                      "queried min coordinates: x [%d..], y [%d..]\n",
 417                                      priv->x_min, priv->y_min);
 418                 }
 419         }
 420
 421         return 0;
 422 }
 423
 424 /*
 425  * Apply quirk(s) if the hardware matches
 426  */
 427
 428 static void synaptics_apply_quirks(struct psmouse *psmouse)
 429 {
 430         struct synaptics_data *priv = psmouse->private;
 431         int i;
 432
 433         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 434                 if (!psmouse_matches_pnp_id(psmouse,
 435                                             min_max_pnpid_table[i].pnp_ids))
 436                         continue;
 437
 438                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 439                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 440                         continue;
 441
 442                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 443                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 444                         continue;
 445
 446                 priv->x_min = min_max_pnpid_table[i].x_min;
 447                 priv->x_max = min_max_pnpid_table[i].x_max;
 448                 priv->y_min = min_max_pnpid_table[i].y_min;
 449                 priv->y_max = min_max_pnpid_table[i].y_max;
 450                 psmouse_info(psmouse,
 451                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 452                              priv->x_min, priv->x_max,
 453                              priv->y_min, priv->y_max);
 454                 break;
 455         }
 456 }
 457
 458 static int synaptics_query_hardware(struct psmouse *psmouse)
 459 {
 460         if (synaptics_identify(psmouse))
 461                 return -1;
 462         if (synaptics_model_id(psmouse))
 463                 return -1;
 464         if (synaptics_firmware_id(psmouse))
 465                 return -1;
 466         if (synaptics_query_modes(psmouse))
 467                 return -1;
 468         if (synaptics_capability(psmouse))
 469                 return -1;
 470         if (synaptics_resolution(psmouse))
 471                 return -1;
 472
 473         synaptics_apply_quirks(psmouse);
 474
 475         return 0;
 476 }
 477
 478 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 479 {
 480         static unsigned char param = 0xc8;
 481         struct synaptics_data *priv = psmouse->private;
 482
 483         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 484               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 485                 return 0;
 486
 487         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 488                 return -1;
 489
 490         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 491                 return -1;
 492
 493         /* Advanced gesture mode also sends multi finger data */
 494         priv->capabilities |= BIT(1);
 495
 496         return 0;
 497 }
 498
 499 static int synaptics_set_mode(struct psmouse *psmouse)
 500 {
 501         struct synaptics_data *priv = psmouse->private;
 502
 503         priv->mode = 0;
 504         if (priv->absolute_mode)
 505                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 506         if (priv->disable_gesture)
 507                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 508         if (psmouse->rate >= 80)
 509                 priv->mode |= SYN_BIT_HIGH_RATE;
 510         if (SYN_CAP_EXTENDED(priv->capabilities))
 511                 priv->mode |= SYN_BIT_W_MODE;
 512
 513         if (synaptics_mode_cmd(psmouse, priv->mode))
 514                 return -1;
 515
 516         if (priv->absolute_mode &&
 517             synaptics_set_advanced_gesture_mode(psmouse)) {
 518                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 519                 return -1;
 520         }
 521
 522         return 0;
 523 }
 524
 525 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 526 {
 527         struct synaptics_data *priv = psmouse->private;
 528
 529         if (rate >= 80) {
 530                 priv->mode |= SYN_BIT_HIGH_RATE;
 531                 psmouse->rate = 80;
 532         } else {
 533                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 534                 psmouse->rate = 40;
 535         }
 536
 537         synaptics_mode_cmd(psmouse, priv->mode);
 538 }
 539
 540 /*****************************************************************************
 541  *      Synaptics pass-through PS/2 port support
 542  ****************************************************************************/
 543 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 544 {
 545         struct psmouse *parent = serio_get_drvdata(serio->parent);
 546         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 547
 548         if (psmouse_sliced_command(parent, c))
 549                 return -1;
 550         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 551                 return -1;
 552         return 0;
 553 }
 554
 555 static int synaptics_pt_start(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 = serio;
 562         serio_continue_rx(parent->ps2dev.serio);
 563
 564         return 0;
 565 }
 566
 567 static void synaptics_pt_stop(struct serio *serio)
 568 {
 569         struct psmouse *parent = serio_get_drvdata(serio->parent);
 570         struct synaptics_data *priv = parent->private;
 571
 572         serio_pause_rx(parent->ps2dev.serio);
 573         priv->pt_port = NULL;
 574         serio_continue_rx(parent->ps2dev.serio);
 575 }
 576
 577 static int synaptics_is_pt_packet(unsigned char *buf)
 578 {
 579         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 580 }
 581
 582 static void synaptics_pass_pt_packet(struct psmouse *psmouse,
 583                                      struct serio *ptport,
 584                                      unsigned char *packet)
 585 {
 586         struct synaptics_data *priv = psmouse->private;
 587         struct psmouse *child = serio_get_drvdata(ptport);
 588
 589         if (child && child->state == PSMOUSE_ACTIVATED) {
 590                 serio_interrupt(ptport, packet[1] | priv->pt_buttons, 0);
 591                 serio_interrupt(ptport, packet[4], 0);
 592                 serio_interrupt(ptport, packet[5], 0);
 593                 if (child->pktsize == 4)
 594                         serio_interrupt(ptport, packet[2], 0);
 595         } else {
 596                 serio_interrupt(ptport, packet[1], 0);
 597         }
 598 }
 599
 600 static void synaptics_pt_activate(struct psmouse *psmouse)
 601 {
 602         struct synaptics_data *priv = psmouse->private;
 603         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 604
 605         /* adjust the touchpad to child's choice of protocol */
 606         if (child) {
 607                 if (child->pktsize == 4)
 608                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 609                 else
 610                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 611
 612                 if (synaptics_mode_cmd(psmouse, priv->mode))
 613                         psmouse_warn(psmouse,
 614                                      "failed to switch guest protocol\n");
 615         }
 616 }
 617
 618 static void synaptics_pt_create(struct psmouse *psmouse)
 619 {
 620         struct serio *serio;
 621
 622         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 623         if (!serio) {
 624                 psmouse_err(psmouse,
 625                             "not enough memory for pass-through port\n");
 626                 return;
 627         }
 628
 629         serio->id.type = SERIO_PS_PSTHRU;
 630         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 631         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 632         serio->write = synaptics_pt_write;
 633         serio->start = synaptics_pt_start;
 634         serio->stop = synaptics_pt_stop;
 635         serio->parent = psmouse->ps2dev.serio;
 636
 637         psmouse->pt_activate = synaptics_pt_activate;
 638
 639         psmouse_info(psmouse, "serio: %s port at %s\n",
 640                      serio->name, psmouse->phys);
 641         serio_register_port(serio);
 642 }
 643
 644 /*****************************************************************************
 645  *      Functions to interpret the absolute mode packets
 646  ****************************************************************************/
 647
 648 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 649                                    int sgm, int agm)
 650 {
 651         state->count = count;
 652         state->sgm = sgm;
 653         state->agm = agm;
 654 }
 655
 656 static void synaptics_parse_agm(const unsigned char buf[],
 657                                 struct synaptics_data *priv,
 658                                 struct synaptics_hw_state *hw)
 659 {
 660         struct synaptics_hw_state *agm = &priv->agm;
 661         int agm_packet_type;
 662
 663         agm_packet_type = (buf[5] & 0x30) >> 4;
 664         switch (agm_packet_type) {
 665         case 1:
 666                 /* Gesture packet: (x, y, z) half resolution */
 667                 agm->w = hw->w;
 668                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 669                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 670                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 671                 break;
 672
 673         case 2:
 674                 /* AGM-CONTACT packet: (count, sgm, agm) */
 675                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 676                 break;
 677
 678         default:
 679                 break;
 680         }
 681
 682         /* Record that at least one AGM has been received since last SGM */
 683         priv->agm_pending = true;
 684 }
 685
 686 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 687                                         struct synaptics_data *priv,
 688                                         struct synaptics_hw_state *hw)
 689 {
 690         unsigned int ext_bits =
 691                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 692         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 693
 694         hw->ext_buttons = buf[4] & ext_mask;
 695         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 696 }
 697
 698 static bool is_forcepad;
 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 (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_slot(struct input_dev *dev, int slot,
 912                                   const struct synaptics_hw_state *hw)
 913 {
 914         input_mt_slot(dev, slot);
 915         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 916         if (!hw)
 917                 return;
 918
 919         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 920         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 921         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 922 }
 923
 924 static void synaptics_report_mt_data(struct psmouse *psmouse,
 925                                      struct synaptics_mt_state *mt_state,
 926                                      const struct synaptics_hw_state *sgm)
 927 {
 928         struct input_dev *dev = psmouse->dev;
 929         struct synaptics_data *priv = psmouse->private;
 930         struct synaptics_hw_state *agm = &priv->agm;
 931         struct synaptics_mt_state *old = &priv->mt_state;
 932
 933         switch (mt_state->count) {
 934         case 0:
 935                 synaptics_report_slot(dev, 0, NULL);
 936                 synaptics_report_slot(dev, 1, NULL);
 937                 break;
 938         case 1:
 939                 if (mt_state->sgm == -1) {
 940                         synaptics_report_slot(dev, 0, NULL);
 941                         synaptics_report_slot(dev, 1, NULL);
 942                 } else if (mt_state->sgm == 0) {
 943                         synaptics_report_slot(dev, 0, sgm);
 944                         synaptics_report_slot(dev, 1, NULL);
 945                 } else {
 946                         synaptics_report_slot(dev, 0, NULL);
 947                         synaptics_report_slot(dev, 1, sgm);
 948                 }
 949                 break;
 950         default:
 951                 /*
 952                  * If the finger slot contained in SGM is valid, and either
 953                  * hasn't changed, or is new, or the old SGM has now moved to
 954                  * AGM, then report SGM in MTB slot 0.
 955                  * Otherwise, empty MTB slot 0.
 956                  */
 957                 if (mt_state->sgm != -1 &&
 958                     (mt_state->sgm == old->sgm ||
 959                      old->sgm == -1 || mt_state->agm == old->sgm))
 960                         synaptics_report_slot(dev, 0, sgm);
 961                 else
 962                         synaptics_report_slot(dev, 0, NULL);
 963
 964                 /*
 965                  * If the finger slot contained in AGM is valid, and either
 966                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 967                  * Otherwise, empty MTB slot 1.
 968                  *
 969                  * However, in the case where the AGM is new, make sure that
 970                  * that it is either the same as the old SGM, or there was no
 971                  * SGM.
 972                  *
 973                  * Otherwise, if the SGM was just 1, and the new AGM is 2, then
 974                  * the new AGM will keep the old SGM's tracking ID, which can
 975                  * cause apparent drumroll.  This happens if in the following
 976                  * valid finger sequence:
 977                  *
 978                  *  Action                 SGM  AGM (MTB slot:Contact)
 979                  *  1. Touch contact 0    (0:0)
 980                  *  2. Touch contact 1    (0:0, 1:1)
 981                  *  3. Lift  contact 0    (1:1)
 982                  *  4. Touch contacts 2,3 (0:2, 1:3)
 983                  *
 984                  * In step 4, contact 3, in AGM must not be given the same
 985                  * tracking ID as contact 1 had in step 3.  To avoid this,
 986                  * the first agm with contact 3 is dropped and slot 1 is
 987                  * invalidated (tracking ID = -1).
 988                  */
 989                 if (mt_state->agm != -1 &&
 990                     (mt_state->agm == old->agm ||
 991                      (old->agm == -1 &&
 992                       (old->sgm == -1 || mt_state->agm == old->sgm))))
 993                         synaptics_report_slot(dev, 1, agm);
 994                 else
 995                         synaptics_report_slot(dev, 1, NULL);
 996                 break;
 997         }
 998
 999         /* Don't use active slot count to generate BTN_TOOL events. */
1000         input_mt_report_pointer_emulation(dev, false);
1001
1002         /* Send the number of fingers reported by touchpad itself. */
1003         input_mt_report_finger_count(dev, mt_state->count);
1004
1005         synaptics_report_buttons(psmouse, sgm);
1006
1007         input_sync(dev);
1008 }
1009
1010 /* Handle case where mt_state->count = 0 */
1011 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
1012                                       struct synaptics_mt_state *mt_state)
1013 {
1014         synaptics_mt_state_set(mt_state, 0, -1, -1);
1015         priv->mt_state_lost = false;
1016 }
1017
1018 /* Handle case where mt_state->count = 1 */
1019 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
1020                                       struct synaptics_mt_state *mt_state)
1021 {
1022         struct synaptics_hw_state *agm = &priv->agm;
1023         struct synaptics_mt_state *old = &priv->mt_state;
1024
1025         /*
1026          * If the last AGM was (0,0,0), and there is only one finger left,
1027          * then we absolutely know that SGM contains slot 0, and all other
1028          * fingers have been removed.
1029          */
1030         if (priv->agm_pending && agm->z == 0) {
1031                 synaptics_mt_state_set(mt_state, 1, 0, -1);
1032                 priv->mt_state_lost = false;
1033                 return;
1034         }
1035
1036         switch (old->count) {
1037         case 0:
1038                 synaptics_mt_state_set(mt_state, 1, 0, -1);
1039                 break;
1040         case 1:
1041                 /*
1042                  * If mt_state_lost, then the previous transition was 3->1,
1043                  * and SGM now contains either slot 0 or 1, but we don't know
1044                  * which.  So, we just assume that the SGM now contains slot 1.
1045                  *
1046                  * If pending AGM and either:
1047                  *   (a) the previous SGM slot contains slot 0, or
1048                  *   (b) there was no SGM slot
1049                  * then, the SGM now contains slot 1
1050                  *
1051                  * Case (a) happens with very rapid "drum roll" gestures, where
1052                  * slot 0 finger is lifted and a new slot 1 finger touches
1053                  * within one reporting interval.
1054                  *
1055                  * Case (b) happens if initially two or more fingers tap
1056                  * briefly, and all but one lift before the end of the first
1057                  * reporting interval.
1058                  *
1059                  * (In both these cases, slot 0 will becomes empty, so SGM
1060                  * contains slot 1 with the new finger)
1061                  *
1062                  * Else, if there was no previous SGM, it now contains slot 0.
1063                  *
1064                  * Otherwise, SGM still contains the same slot.
1065                  */
1066                 if (priv->mt_state_lost ||
1067                     (priv->agm_pending && old->sgm <= 0))
1068                         synaptics_mt_state_set(mt_state, 1, 1, -1);
1069                 else if (old->sgm == -1)
1070                         synaptics_mt_state_set(mt_state, 1, 0, -1);
1071                 break;
1072         case 2:
1073                 /*
1074                  * If mt_state_lost, we don't know which finger SGM contains.
1075                  *
1076                  * So, report 1 finger, but with both slots empty.
1077                  * We will use slot 1 on subsequent 1->1
1078                  */
1079                 if (priv->mt_state_lost) {
1080                         synaptics_mt_state_set(mt_state, 1, -1, -1);
1081                         break;
1082                 }
1083                 /*
1084                  * Since the last AGM was NOT (0,0,0), it was the finger in
1085                  * slot 0 that has been removed.
1086                  * So, SGM now contains previous AGM's slot, and AGM is now
1087                  * empty.
1088                  */
1089                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
1090                 break;
1091         case 3:
1092                 /*
1093                  * Since last AGM was not (0,0,0), we don't know which finger
1094                  * is left.
1095                  *
1096                  * So, report 1 finger, but with both slots empty.
1097                  * We will use slot 1 on subsequent 1->1
1098                  */
1099                 synaptics_mt_state_set(mt_state, 1, -1, -1);
1100                 priv->mt_state_lost = true;
1101                 break;
1102         case 4:
1103         case 5:
1104                 /* mt_state was updated by AGM-CONTACT packet */
1105                 break;
1106         }
1107 }
1108
1109 /* Handle case where mt_state->count = 2 */
1110 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1111                                       struct synaptics_mt_state *mt_state)
1112 {
1113         struct synaptics_mt_state *old = &priv->mt_state;
1114
1115         switch (old->count) {
1116         case 0:
1117                 synaptics_mt_state_set(mt_state, 2, 0, 1);
1118                 break;
1119         case 1:
1120                 /*
1121                  * If previous SGM contained slot 1 or higher, SGM now contains
1122                  * slot 0 (the newly touching finger) and AGM contains SGM's
1123                  * previous slot.
1124                  *
1125                  * Otherwise, SGM still contains slot 0 and AGM now contains
1126                  * slot 1.
1127                  */
1128                 if (old->sgm >= 1)
1129                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1130                 else
1131                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1132                 break;
1133         case 2:
1134                 /*
1135                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
1136                  * we don't know which.
1137                  * So, we just assume that the SGM contains slot 0 and AGM 1.
1138                  */
1139                 if (priv->mt_state_lost)
1140                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1141                 /*
1142                  * Otherwise, use the same mt_state, since it either hasn't
1143                  * changed, or was updated by a recently received AGM-CONTACT
1144                  * packet.
1145                  */
1146                 break;
1147         case 3:
1148                 /*
1149                  * 3->2 transitions have two unsolvable problems:
1150                  *  1) no indication is given which finger was removed
1151                  *  2) no way to tell if agm packet was for finger 3
1152                  *     before 3->2, or finger 2 after 3->2.
1153                  *
1154                  * So, report 2 fingers, but empty all slots.
1155                  * We will guess slots [0,1] on subsequent 2->2.
1156                  */
1157                 synaptics_mt_state_set(mt_state, 2, -1, -1);
1158                 priv->mt_state_lost = true;
1159                 break;
1160         case 4:
1161         case 5:
1162                 /* mt_state was updated by AGM-CONTACT packet */
1163                 break;
1164         }
1165 }
1166
1167 /* Handle case where mt_state->count = 3 */
1168 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1169                                       struct synaptics_mt_state *mt_state)
1170 {
1171         struct synaptics_mt_state *old = &priv->mt_state;
1172
1173         switch (old->count) {
1174         case 0:
1175                 synaptics_mt_state_set(mt_state, 3, 0, 2);
1176                 break;
1177         case 1:
1178                 /*
1179                  * If previous SGM contained slot 2 or higher, SGM now contains
1180                  * slot 0 (one of the newly touching fingers) and AGM contains
1181                  * SGM's previous slot.
1182                  *
1183                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1184                  */
1185                 if (old->sgm >= 2)
1186                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1187                 else
1188                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1189                 break;
1190         case 2:
1191                 /*
1192                  * If the AGM previously contained slot 3 or higher, then the
1193                  * newly touching finger is in the lowest available slot.
1194                  *
1195                  * If SGM was previously 1 or higher, then the new SGM is
1196                  * now slot 0 (with a new finger), otherwise, the new finger
1197                  * is now in a hidden slot between 0 and AGM's slot.
1198                  *
1199                  * In all such cases, the SGM now contains slot 0, and the AGM
1200                  * continues to contain the same slot as before.
1201                  */
1202                 if (old->agm >= 3) {
1203                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1204                         break;
1205                 }
1206
1207                 /*
1208                  * After some 3->1 and all 3->2 transitions, we lose track
1209                  * of which slot is reported by SGM and AGM.
1210                  *
1211                  * For 2->3 in this state, report 3 fingers, but empty all
1212                  * slots, and we will guess (0,2) on a subsequent 0->3.
1213                  *
1214                  * To userspace, the resulting transition will look like:
1215                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1216                  */
1217                 if (priv->mt_state_lost) {
1218                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1219                         break;
1220                 }
1221
1222                 /*
1223                  * If the (SGM,AGM) really previously contained slots (0, 1),
1224                  * then we cannot know what slot was just reported by the AGM,
1225                  * because the 2->3 transition can occur either before or after
1226                  * the AGM packet. Thus, this most recent AGM could contain
1227                  * either the same old slot 1 or the new slot 2.
1228                  * Subsequent AGMs will be reporting slot 2.
1229                  *
1230                  * To userspace, the resulting transition will look like:
1231                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1232                  */
1233                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1234                 break;
1235         case 3:
1236                 /*
1237                  * If, for whatever reason, the previous agm was invalid,
1238                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1239                  */
1240                 if (old->agm <= 2)
1241                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1242                 /*
1243                  * mt_state either hasn't changed, or was updated by a recently
1244                  * received AGM-CONTACT packet.
1245                  */
1246                 break;
1247
1248         case 4:
1249         case 5:
1250                 /* mt_state was updated by AGM-CONTACT packet */
1251                 break;
1252         }
1253 }
1254
1255 /* Handle case where mt_state->count = 4, or = 5 */
1256 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1257                                        struct synaptics_mt_state *mt_state)
1258 {
1259         /* mt_state was updated correctly by AGM-CONTACT packet */
1260         priv->mt_state_lost = false;
1261 }
1262
1263 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1264                                            struct synaptics_hw_state *sgm)
1265 {
1266         struct synaptics_data *priv = psmouse->private;
1267         struct synaptics_hw_state *agm = &priv->agm;
1268         struct synaptics_mt_state mt_state;
1269
1270         /* Initialize using current mt_state (as updated by last agm) */
1271         mt_state = agm->mt_state;
1272
1273         /*
1274          * Update mt_state using the new finger count and current mt_state.
1275          */
1276         if (sgm->z == 0)
1277                 synaptics_image_sensor_0f(priv, &mt_state);
1278         else if (sgm->w >= 4)
1279                 synaptics_image_sensor_1f(priv, &mt_state);
1280         else if (sgm->w == 0)
1281                 synaptics_image_sensor_2f(priv, &mt_state);
1282         else if (sgm->w == 1 && mt_state.count <= 3)
1283                 synaptics_image_sensor_3f(priv, &mt_state);
1284         else
1285                 synaptics_image_sensor_45f(priv, &mt_state);
1286
1287         /* Send resulting input events to user space */
1288         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1289
1290         /* Store updated mt_state */
1291         priv->mt_state = agm->mt_state = mt_state;
1292         priv->agm_pending = false;
1293 }
1294
1295 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1296                                              struct synaptics_hw_state *sgm,
1297                                              int num_fingers)
1298 {
1299         struct input_dev *dev = psmouse->dev;
1300         struct synaptics_data *priv = psmouse->private;
1301         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1302         struct input_mt_pos pos[2];
1303         int slot[2], nsemi, i;
1304
1305         nsemi = clamp_val(num_fingers, 0, 2);
1306
1307         for (i = 0; i < nsemi; i++) {
1308                 pos[i].x = hw[i]->x;
1309                 pos[i].y = synaptics_invert_y(hw[i]->y);
1310         }
1311
1312         input_mt_assign_slots(dev, slot, pos, nsemi);
1313
1314         for (i = 0; i < nsemi; i++) {
1315                 input_mt_slot(dev, slot[i]);
1316                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1317                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1318                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1319                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1320         }
1321
1322         input_mt_drop_unused(dev);
1323         input_mt_report_pointer_emulation(dev, false);
1324         input_mt_report_finger_count(dev, num_fingers);
1325
1326         synaptics_report_buttons(psmouse, sgm);
1327
1328         input_sync(dev);
1329 }
1330
1331 /*
1332  *  called for each full received packet from the touchpad
1333  */
1334 static void synaptics_process_packet(struct psmouse *psmouse)
1335 {
1336         struct input_dev *dev = psmouse->dev;
1337         struct synaptics_data *priv = psmouse->private;
1338         struct synaptics_hw_state hw;
1339         int num_fingers;
1340         int finger_width;
1341
1342         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1343                 return;
1344
1345         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1346                 synaptics_image_sensor_process(psmouse, &hw);
1347                 return;
1348         }
1349
1350         if (hw.scroll) {
1351                 priv->scroll += hw.scroll;
1352
1353                 while (priv->scroll >= 4) {
1354                         input_report_key(dev, BTN_BACK, !hw.down);
1355                         input_sync(dev);
1356                         input_report_key(dev, BTN_BACK, hw.down);
1357                         input_sync(dev);
1358                         priv->scroll -= 4;
1359                 }
1360                 while (priv->scroll <= -4) {
1361                         input_report_key(dev, BTN_FORWARD, !hw.up);
1362                         input_sync(dev);
1363                         input_report_key(dev, BTN_FORWARD, hw.up);
1364                         input_sync(dev);
1365                         priv->scroll += 4;
1366                 }
1367                 return;
1368         }
1369
1370         if (hw.z > 0 && hw.x > 1) {
1371                 num_fingers = 1;
1372                 finger_width = 5;
1373                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1374                         switch (hw.w) {
1375                         case 0 ... 1:
1376                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1377                                         num_fingers = hw.w + 2;
1378                                 break;
1379                         case 2:
1380                                 if (SYN_MODEL_PEN(priv->model_id))
1381                                         ;   /* Nothing, treat a pen as a single finger */
1382                                 break;
1383                         case 4 ... 15:
1384                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1385                                         finger_width = hw.w;
1386                                 break;
1387                         }
1388                 }
1389         } else {
1390                 num_fingers = 0;
1391                 finger_width = 0;
1392         }
1393
1394         if (cr48_profile_sensor) {
1395                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1396                 return;
1397         }
1398
1399         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1400                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1401                                               num_fingers);
1402
1403         /* Post events
1404          * BTN_TOUCH has to be first as mousedev relies on it when doing
1405          * absolute -> relative conversion
1406          */
1407         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1408         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1409
1410         if (num_fingers > 0) {
1411                 input_report_abs(dev, ABS_X, hw.x);
1412                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1413         }
1414         input_report_abs(dev, ABS_PRESSURE, hw.z);
1415
1416         if (SYN_CAP_PALMDETECT(priv->capabilities))
1417                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1418
1419         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1420         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1421                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1422                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1423         }
1424
1425         synaptics_report_buttons(psmouse, &hw);
1426
1427         input_sync(dev);
1428 }
1429
1430 static int synaptics_validate_byte(struct psmouse *psmouse,
1431                                    int idx, unsigned char pkt_type)
1432 {
1433         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1434         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1435         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1436         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1437         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1438         const char *packet = psmouse->packet;
1439
1440         if (idx < 0 || idx > 4)
1441                 return 0;
1442
1443         switch (pkt_type) {
1444
1445         case SYN_NEWABS:
1446         case SYN_NEWABS_RELAXED:
1447                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1448
1449         case SYN_NEWABS_STRICT:
1450                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1451
1452         case SYN_OLDABS:
1453                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1454
1455         default:
1456                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1457                 return 0;
1458         }
1459 }
1460
1461 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1462 {
1463         int i;
1464
1465         for (i = 0; i < 5; i++)
1466                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1467                         psmouse_info(psmouse, "using relaxed packet validation\n");
1468                         return SYN_NEWABS_RELAXED;
1469                 }
1470
1471         return SYN_NEWABS_STRICT;
1472 }
1473
1474 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1475 {
1476         struct synaptics_data *priv = psmouse->private;
1477
1478         if (psmouse->pktcnt >= 6) { /* Full packet received */
1479                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1480                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1481
1482                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1483                     synaptics_is_pt_packet(psmouse->packet)) {
1484                         if (priv->pt_port)
1485                                 synaptics_pass_pt_packet(psmouse, priv->pt_port,
1486                                                          psmouse->packet);
1487                 } else
1488                         synaptics_process_packet(psmouse);
1489
1490                 return PSMOUSE_FULL_PACKET;
1491         }
1492
1493         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1494                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1495 }
1496
1497 /*****************************************************************************
1498  *      Driver initialization/cleanup functions
1499  ****************************************************************************/
1500 static void set_abs_position_params(struct input_dev *dev,
1501                                     struct synaptics_data *priv, int x_code,
1502                                     int y_code)
1503 {
1504         int x_min = priv->x_min ?: XMIN_NOMINAL;
1505         int x_max = priv->x_max ?: XMAX_NOMINAL;
1506         int y_min = priv->y_min ?: YMIN_NOMINAL;
1507         int y_max = priv->y_max ?: YMAX_NOMINAL;
1508         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1509                         SYN_REDUCED_FILTER_FUZZ : 0;
1510
1511         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1512         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1513         input_abs_set_res(dev, x_code, priv->x_res);
1514         input_abs_set_res(dev, y_code, priv->y_res);
1515 }
1516
1517 static void set_input_params(struct psmouse *psmouse,
1518                              struct synaptics_data *priv)
1519 {
1520         struct input_dev *dev = psmouse->dev;
1521         int i;
1522
1523         /* Things that apply to both modes */
1524         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1525         __set_bit(EV_KEY, dev->evbit);
1526         __set_bit(BTN_LEFT, dev->keybit);
1527         __set_bit(BTN_RIGHT, dev->keybit);
1528
1529         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1530                 __set_bit(BTN_MIDDLE, dev->keybit);
1531
1532         if (!priv->absolute_mode) {
1533                 /* Relative mode */
1534                 __set_bit(EV_REL, dev->evbit);
1535                 __set_bit(REL_X, dev->relbit);
1536                 __set_bit(REL_Y, dev->relbit);
1537                 return;
1538         }
1539
1540         /* Absolute mode */
1541         __set_bit(EV_ABS, dev->evbit);
1542         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1543         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1544
1545         if (cr48_profile_sensor)
1546                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1547
1548         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1549                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1550                                         ABS_MT_POSITION_Y);
1551                 /* Image sensors can report per-contact pressure */
1552                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1553                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1554
1555                 /* Image sensors can signal 4 and 5 finger clicks */
1556                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1557                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1558         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1559                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1560                                         ABS_MT_POSITION_Y);
1561                 /*
1562                  * Profile sensor in CR-48 tracks contacts reasonably well,
1563                  * other non-image sensors with AGM use semi-mt.
1564                  */
1565                 input_mt_init_slots(dev, 2,
1566                                     INPUT_MT_POINTER |
1567                                     (cr48_profile_sensor ?
1568                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1569         }
1570
1571         if (SYN_CAP_PALMDETECT(priv->capabilities))
1572                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1573
1574         __set_bit(BTN_TOUCH, dev->keybit);
1575         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1576
1577         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1578                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1579                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1580         }
1581
1582         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1583             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1584                 __set_bit(BTN_FORWARD, dev->keybit);
1585                 __set_bit(BTN_BACK, dev->keybit);
1586         }
1587
1588         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1589                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1590                         __set_bit(BTN_0 + i, dev->keybit);
1591
1592         __clear_bit(EV_REL, dev->evbit);
1593         __clear_bit(REL_X, dev->relbit);
1594         __clear_bit(REL_Y, dev->relbit);
1595
1596         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1597                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1598                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1599                     !SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1600                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1601                 /* Clickpads report only left button */
1602                 __clear_bit(BTN_RIGHT, dev->keybit);
1603                 __clear_bit(BTN_MIDDLE, dev->keybit);
1604         }
1605 }
1606
1607 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1608                                               void *data, char *buf)
1609 {
1610         struct synaptics_data *priv = psmouse->private;
1611
1612         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1613 }
1614
1615 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1616                                              void *data, const char *buf,
1617                                              size_t len)
1618 {
1619         struct synaptics_data *priv = psmouse->private;
1620         unsigned int value;
1621         int err;
1622
1623         err = kstrtouint(buf, 10, &value);
1624         if (err)
1625                 return err;
1626
1627         if (value > 1)
1628                 return -EINVAL;
1629
1630         if (value == priv->disable_gesture)
1631                 return len;
1632
1633         priv->disable_gesture = value;
1634         if (value)
1635                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1636         else
1637                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1638
1639         if (synaptics_mode_cmd(psmouse, priv->mode))
1640                 return -EIO;
1641
1642         return len;
1643 }
1644
1645 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1646                     synaptics_show_disable_gesture,
1647                     synaptics_set_disable_gesture);
1648
1649 static void synaptics_disconnect(struct psmouse *psmouse)
1650 {
1651         struct synaptics_data *priv = psmouse->private;
1652
1653         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1654                 device_remove_file(&psmouse->ps2dev.serio->dev,
1655                                    &psmouse_attr_disable_gesture.dattr);
1656
1657         synaptics_reset(psmouse);
1658         kfree(priv);
1659         psmouse->private = NULL;
1660 }
1661
1662 static int synaptics_reconnect(struct psmouse *psmouse)
1663 {
1664         struct synaptics_data *priv = psmouse->private;
1665         struct synaptics_data old_priv = *priv;
1666         unsigned char param[2];
1667         int retry = 0;
1668         int error;
1669
1670         do {
1671                 psmouse_reset(psmouse);
1672                 if (retry) {
1673                         /*
1674                          * On some boxes, right after resuming, the touchpad
1675                          * needs some time to finish initializing (I assume
1676                          * it needs time to calibrate) and start responding
1677                          * to Synaptics-specific queries, so let's wait a
1678                          * bit.
1679                          */
1680                         ssleep(1);
1681                 }
1682                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1683                 error = synaptics_detect(psmouse, 0);
1684         } while (error && ++retry < 3);
1685
1686         if (error)
1687                 return -1;
1688
1689         if (retry > 1)
1690                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1691
1692         if (synaptics_query_hardware(psmouse)) {
1693                 psmouse_err(psmouse, "Unable to query device.\n");
1694                 return -1;
1695         }
1696
1697         if (synaptics_set_mode(psmouse)) {
1698                 psmouse_err(psmouse, "Unable to initialize device.\n");
1699                 return -1;
1700         }
1701
1702         if (old_priv.identity != priv->identity ||
1703             old_priv.model_id != priv->model_id ||
1704             old_priv.capabilities != priv->capabilities ||
1705             old_priv.ext_cap != priv->ext_cap) {
1706                 psmouse_err(psmouse,
1707                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1708                             old_priv.identity, priv->identity,
1709                             old_priv.model_id, priv->model_id,
1710                             old_priv.capabilities, priv->capabilities,
1711                             old_priv.ext_cap, priv->ext_cap);
1712                 return -1;
1713         }
1714
1715         return 0;
1716 }
1717
1718 static bool impaired_toshiba_kbc;
1719
1720 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1721 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1722         {
1723                 /* Toshiba Satellite */
1724                 .matches = {
1725                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1726                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1727                 },
1728         },
1729         {
1730                 /* Toshiba Dynabook */
1731                 .matches = {
1732                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1733                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1734                 },
1735         },
1736         {
1737                 /* Toshiba Portege M300 */
1738                 .matches = {
1739                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1740                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1741                 },
1742
1743         },
1744         {
1745                 /* Toshiba Portege M300 */
1746                 .matches = {
1747                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1748                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1749                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1750                 },
1751
1752         },
1753 #endif
1754         { }
1755 };
1756
1757 static bool broken_olpc_ec;
1758
1759 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1760 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1761         {
1762                 /* OLPC XO-1 or XO-1.5 */
1763                 .matches = {
1764                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1765                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1766                 },
1767         },
1768 #endif
1769         { }
1770 };
1771
1772 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1773 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1774         {
1775                 /* Cr-48 Chromebook (Codename Mario) */
1776                 .matches = {
1777                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1778                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1779                 },
1780         },
1781 #endif
1782         { }
1783 };
1784
1785 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1786 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1787         {
1788                 .matches = {
1789                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1790                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1791                 },
1792         },
1793 #endif
1794         { }
1795 };
1796
1797 void __init synaptics_module_init(void)
1798 {
1799         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1800         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1801         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1802
1803         /*
1804          * Unfortunately ForcePad capability is not exported over PS/2,
1805          * so we have to resort to checking DMI.
1806          */
1807         is_forcepad = dmi_check_system(forcepad_dmi_table);
1808 }
1809
1810 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1811 {
1812         struct synaptics_data *priv;
1813         int err = -1;
1814
1815         /*
1816          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1817          * packet spew overloads the EC such that key presses on the keyboard
1818          * are missed.  Given that, don't even attempt to use Absolute mode.
1819          * Relative mode seems to work just fine.
1820          */
1821         if (absolute_mode && broken_olpc_ec) {
1822                 psmouse_info(psmouse,
1823                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1824                 return -ENODEV;
1825         }
1826
1827         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1828         if (!priv)
1829                 return -ENOMEM;
1830
1831         psmouse_reset(psmouse);
1832
1833         if (synaptics_query_hardware(psmouse)) {
1834                 psmouse_err(psmouse, "Unable to query device.\n");
1835                 goto init_fail;
1836         }
1837
1838         priv->absolute_mode = absolute_mode;
1839         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1840                 priv->disable_gesture = true;
1841
1842         if (synaptics_set_mode(psmouse)) {
1843                 psmouse_err(psmouse, "Unable to initialize device.\n");
1844                 goto init_fail;
1845         }
1846
1847         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1848
1849         psmouse_info(psmouse,
1850                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1851                      SYN_ID_MODEL(priv->identity),
1852                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1853                      priv->model_id,
1854                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1855                      priv->board_id, priv->firmware_id);
1856
1857         set_input_params(psmouse, priv);
1858
1859         /*
1860          * Encode touchpad model so that it can be used to set
1861          * input device->id.version and be visible to userspace.
1862          * Because version is __u16 we have to drop something.
1863          * Hardware info bits seem to be good candidates as they
1864          * are documented to be for Synaptics corp. internal use.
1865          */
1866         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1867                           (priv->model_id & 0x000000ff);
1868
1869         if (absolute_mode) {
1870                 psmouse->protocol_handler = synaptics_process_byte;
1871                 psmouse->pktsize = 6;
1872         } else {
1873                 /* Relative mode follows standard PS/2 mouse protocol */
1874                 psmouse->protocol_handler = psmouse_process_byte;
1875                 psmouse->pktsize = 3;
1876         }
1877
1878         psmouse->set_rate = synaptics_set_rate;
1879         psmouse->disconnect = synaptics_disconnect;
1880         psmouse->reconnect = synaptics_reconnect;
1881         psmouse->cleanup = synaptics_reset;
1882         /* Synaptics can usually stay in sync without extra help */
1883         psmouse->resync_time = 0;
1884
1885         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1886                 synaptics_pt_create(psmouse);
1887
1888         /*
1889          * Toshiba's KBC seems to have trouble handling data from
1890          * Synaptics at full rate.  Switch to a lower rate (roughly
1891          * the same rate as a standard PS/2 mouse).
1892          */
1893         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1894                 psmouse_info(psmouse,
1895                              "Toshiba %s detected, limiting rate to 40pps.\n",
1896                              dmi_get_system_info(DMI_PRODUCT_NAME));
1897                 psmouse->rate = 40;
1898         }
1899
1900         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1901                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1902                                          &psmouse_attr_disable_gesture.dattr);
1903                 if (err) {
1904                         psmouse_err(psmouse,
1905                                     "Failed to create disable_gesture attribute (%d)",
1906                                     err);
1907                         goto init_fail;
1908                 }
1909         }
1910
1911         return 0;
1912
1913  init_fail:
1914         kfree(priv);
1915         return err;
1916 }
1917
1918 int synaptics_init(struct psmouse *psmouse)
1919 {
1920         return __synaptics_init(psmouse, true);
1921 }
1922
1923 int synaptics_init_relative(struct psmouse *psmouse)
1924 {
1925         return __synaptics_init(psmouse, false);
1926 }
1927
1928 bool synaptics_supported(void)
1929 {
1930         return true;
1931 }
1932
1933 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1934
1935 void __init synaptics_module_init(void)
1936 {
1937 }
1938
1939 int synaptics_init(struct psmouse *psmouse)
1940 {
1941         return -ENOSYS;
1942 }
1943
1944 bool synaptics_supported(void)
1945 {
1946         return false;
1947 }
1948
1949 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */