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 struct min_max_quirk {
 124         const char * const *pnp_ids;
 125         int x_min, x_max, y_min, y_max;
 126 };
 127
 128 static const struct min_max_quirk min_max_pnpid_table[] = {
 129         {
 130                 (const char * const []){"LEN0033", NULL},
 131                 1024, 5052, 2258, 4832
 132         },
 133         {
 134                 (const char * const []){"LEN0035", "LEN0042", NULL},
 135                 1232, 5710, 1156, 4696
 136         },
 137         {
 138                 (const char * const []){"LEN0034", "LEN0036", "LEN2002",
 139                                         "LEN2004", NULL},
 140                 1024, 5112, 2024, 4832
 141         },
 142         {
 143                 (const char * const []){"LEN2001", NULL},
 144                 1024, 5022, 2508, 4832
 145         },
 146         { }
 147 };
 148
 149 /* This list has been kindly provided by Synaptics. */
 150 static const char * const topbuttonpad_pnp_ids[] = {
 151         "LEN0017",
 152         "LEN0018",
 153         "LEN0019",
 154         "LEN0023",
 155         "LEN002A",
 156         "LEN002B",
 157         "LEN002C",
 158         "LEN002D",
 159         "LEN002E",
 160         "LEN0033", /* Helix */
 161         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 162         "LEN0035", /* X240 */
 163         "LEN0036", /* T440 */
 164         "LEN0037",
 165         "LEN0038",
 166         "LEN0041",
 167         "LEN0042", /* Yoga */
 168         "LEN0045",
 169         "LEN0046",
 170         "LEN0047",
 171         "LEN0048",
 172         "LEN0049",
 173         "LEN2000",
 174         "LEN2001", /* Edge E431 */
 175         "LEN2002", /* Edge E531 */
 176         "LEN2003",
 177         "LEN2004", /* L440 */
 178         "LEN2005",
 179         "LEN2006",
 180         "LEN2007",
 181         "LEN2008",
 182         "LEN2009",
 183         "LEN200A",
 184         "LEN200B",
 185         NULL
 186 };
 187
 188 /*****************************************************************************
 189  *      Synaptics communications functions
 190  ****************************************************************************/
 191
 192 /*
 193  * Synaptics touchpads report the y coordinate from bottom to top, which is
 194  * opposite from what userspace expects.
 195  * This function is used to invert y before reporting.
 196  */
 197 static int synaptics_invert_y(int y)
 198 {
 199         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 200 }
 201
 202 /*
 203  * Send a command to the synpatics touchpad by special commands
 204  */
 205 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 206 {
 207         if (psmouse_sliced_command(psmouse, c))
 208                 return -1;
 209         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 210                 return -1;
 211         return 0;
 212 }
 213
 214 /*
 215  * Read the model-id bytes from the touchpad
 216  * see also SYN_MODEL_* macros
 217  */
 218 static int synaptics_model_id(struct psmouse *psmouse)
 219 {
 220         struct synaptics_data *priv = psmouse->private;
 221         unsigned char mi[3];
 222
 223         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 224                 return -1;
 225         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 226         return 0;
 227 }
 228
 229 /*
 230  * Read the board id from the touchpad
 231  * The board id is encoded in the "QUERY MODES" response
 232  */
 233 static int synaptics_board_id(struct psmouse *psmouse)
 234 {
 235         struct synaptics_data *priv = psmouse->private;
 236         unsigned char bid[3];
 237
 238         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 239                 return -1;
 240         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 241         return 0;
 242 }
 243
 244 /*
 245  * Read the firmware id from the touchpad
 246  */
 247 static int synaptics_firmware_id(struct psmouse *psmouse)
 248 {
 249         struct synaptics_data *priv = psmouse->private;
 250         unsigned char fwid[3];
 251
 252         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 253                 return -1;
 254         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 255         return 0;
 256 }
 257
 258 /*
 259  * Read the capability-bits from the touchpad
 260  * see also the SYN_CAP_* macros
 261  */
 262 static int synaptics_capability(struct psmouse *psmouse)
 263 {
 264         struct synaptics_data *priv = psmouse->private;
 265         unsigned char cap[3];
 266
 267         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 268                 return -1;
 269         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 270         priv->ext_cap = priv->ext_cap_0c = 0;
 271
 272         /*
 273          * Older firmwares had submodel ID fixed to 0x47
 274          */
 275         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 276             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 277                 return -1;
 278         }
 279
 280         /*
 281          * Unless capExtended is set the rest of the flags should be ignored
 282          */
 283         if (!SYN_CAP_EXTENDED(priv->capabilities))
 284                 priv->capabilities = 0;
 285
 286         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 287                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 288                         psmouse_warn(psmouse,
 289                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 290                 } else {
 291                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 292
 293                         /*
 294                          * if nExtBtn is greater than 8 it should be considered
 295                          * invalid and treated as 0
 296                          */
 297                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 298                                 priv->ext_cap &= 0xff0fff;
 299                 }
 300         }
 301
 302         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 303                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 304                         psmouse_warn(psmouse,
 305                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 306                 } else {
 307                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 308                 }
 309         }
 310
 311         return 0;
 312 }
 313
 314 /*
 315  * Identify Touchpad
 316  * See also the SYN_ID_* macros
 317  */
 318 static int synaptics_identify(struct psmouse *psmouse)
 319 {
 320         struct synaptics_data *priv = psmouse->private;
 321         unsigned char id[3];
 322
 323         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 324                 return -1;
 325         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 326         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 327                 return 0;
 328         return -1;
 329 }
 330
 331 /*
 332  * Read touchpad resolution and maximum reported coordinates
 333  * Resolution is left zero if touchpad does not support the query
 334  */
 335
 336 static int synaptics_resolution(struct psmouse *psmouse)
 337 {
 338         struct synaptics_data *priv = psmouse->private;
 339         unsigned char resp[3];
 340         int i;
 341
 342         if (SYN_ID_MAJOR(priv->identity) < 4)
 343                 return 0;
 344
 345         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 346                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 347                         priv->x_res = resp[0]; /* x resolution in units/mm */
 348                         priv->y_res = resp[2]; /* y resolution in units/mm */
 349                 }
 350         }
 351
 352         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 353                 if (psmouse_matches_pnp_id(psmouse,
 354                                            min_max_pnpid_table[i].pnp_ids)) {
 355                         priv->x_min = min_max_pnpid_table[i].x_min;
 356                         priv->x_max = min_max_pnpid_table[i].x_max;
 357                         priv->y_min = min_max_pnpid_table[i].y_min;
 358                         priv->y_max = min_max_pnpid_table[i].y_max;
 359                         return 0;
 360                 }
 361         }
 362
 363         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 364             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 365                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 366                         psmouse_warn(psmouse,
 367                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 368                 } else {
 369                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 370                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 371                 }
 372         }
 373
 374         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 375             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 376                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 377                         psmouse_warn(psmouse,
 378                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 379                 } else {
 380                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 381                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 382                 }
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int synaptics_query_hardware(struct psmouse *psmouse)
 389 {
 390         if (synaptics_identify(psmouse))
 391                 return -1;
 392         if (synaptics_model_id(psmouse))
 393                 return -1;
 394         if (synaptics_firmware_id(psmouse))
 395                 return -1;
 396         if (synaptics_board_id(psmouse))
 397                 return -1;
 398         if (synaptics_capability(psmouse))
 399                 return -1;
 400         if (synaptics_resolution(psmouse))
 401                 return -1;
 402
 403         return 0;
 404 }
 405
 406 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 407 {
 408         static unsigned char param = 0xc8;
 409         struct synaptics_data *priv = psmouse->private;
 410
 411         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 412               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 413                 return 0;
 414
 415         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 416                 return -1;
 417
 418         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 419                 return -1;
 420
 421         /* Advanced gesture mode also sends multi finger data */
 422         priv->capabilities |= BIT(1);
 423
 424         return 0;
 425 }
 426
 427 static int synaptics_set_mode(struct psmouse *psmouse)
 428 {
 429         struct synaptics_data *priv = psmouse->private;
 430
 431         priv->mode = 0;
 432         if (priv->absolute_mode)
 433                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 434         if (priv->disable_gesture)
 435                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 436         if (psmouse->rate >= 80)
 437                 priv->mode |= SYN_BIT_HIGH_RATE;
 438         if (SYN_CAP_EXTENDED(priv->capabilities))
 439                 priv->mode |= SYN_BIT_W_MODE;
 440
 441         if (synaptics_mode_cmd(psmouse, priv->mode))
 442                 return -1;
 443
 444         if (priv->absolute_mode &&
 445             synaptics_set_advanced_gesture_mode(psmouse)) {
 446                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 447                 return -1;
 448         }
 449
 450         return 0;
 451 }
 452
 453 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 454 {
 455         struct synaptics_data *priv = psmouse->private;
 456
 457         if (rate >= 80) {
 458                 priv->mode |= SYN_BIT_HIGH_RATE;
 459                 psmouse->rate = 80;
 460         } else {
 461                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 462                 psmouse->rate = 40;
 463         }
 464
 465         synaptics_mode_cmd(psmouse, priv->mode);
 466 }
 467
 468 /*****************************************************************************
 469  *      Synaptics pass-through PS/2 port support
 470  ****************************************************************************/
 471 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 472 {
 473         struct psmouse *parent = serio_get_drvdata(serio->parent);
 474         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 475
 476         if (psmouse_sliced_command(parent, c))
 477                 return -1;
 478         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 479                 return -1;
 480         return 0;
 481 }
 482
 483 static int synaptics_pt_start(struct serio *serio)
 484 {
 485         struct psmouse *parent = serio_get_drvdata(serio->parent);
 486         struct synaptics_data *priv = parent->private;
 487
 488         serio_pause_rx(parent->ps2dev.serio);
 489         priv->pt_port = serio;
 490         serio_continue_rx(parent->ps2dev.serio);
 491
 492         return 0;
 493 }
 494
 495 static void synaptics_pt_stop(struct serio *serio)
 496 {
 497         struct psmouse *parent = serio_get_drvdata(serio->parent);
 498         struct synaptics_data *priv = parent->private;
 499
 500         serio_pause_rx(parent->ps2dev.serio);
 501         priv->pt_port = NULL;
 502         serio_continue_rx(parent->ps2dev.serio);
 503 }
 504
 505 static int synaptics_is_pt_packet(unsigned char *buf)
 506 {
 507         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 508 }
 509
 510 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 511 {
 512         struct psmouse *child = serio_get_drvdata(ptport);
 513
 514         if (child && child->state == PSMOUSE_ACTIVATED) {
 515                 serio_interrupt(ptport, packet[1], 0);
 516                 serio_interrupt(ptport, packet[4], 0);
 517                 serio_interrupt(ptport, packet[5], 0);
 518                 if (child->pktsize == 4)
 519                         serio_interrupt(ptport, packet[2], 0);
 520         } else
 521                 serio_interrupt(ptport, packet[1], 0);
 522 }
 523
 524 static void synaptics_pt_activate(struct psmouse *psmouse)
 525 {
 526         struct synaptics_data *priv = psmouse->private;
 527         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 528
 529         /* adjust the touchpad to child's choice of protocol */
 530         if (child) {
 531                 if (child->pktsize == 4)
 532                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 533                 else
 534                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 535
 536                 if (synaptics_mode_cmd(psmouse, priv->mode))
 537                         psmouse_warn(psmouse,
 538                                      "failed to switch guest protocol\n");
 539         }
 540 }
 541
 542 static void synaptics_pt_create(struct psmouse *psmouse)
 543 {
 544         struct serio *serio;
 545
 546         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 547         if (!serio) {
 548                 psmouse_err(psmouse,
 549                             "not enough memory for pass-through port\n");
 550                 return;
 551         }
 552
 553         serio->id.type = SERIO_PS_PSTHRU;
 554         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 555         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 556         serio->write = synaptics_pt_write;
 557         serio->start = synaptics_pt_start;
 558         serio->stop = synaptics_pt_stop;
 559         serio->parent = psmouse->ps2dev.serio;
 560
 561         psmouse->pt_activate = synaptics_pt_activate;
 562
 563         psmouse_info(psmouse, "serio: %s port at %s\n",
 564                      serio->name, psmouse->phys);
 565         serio_register_port(serio);
 566 }
 567
 568 /*****************************************************************************
 569  *      Functions to interpret the absolute mode packets
 570  ****************************************************************************/
 571
 572 static void synaptics_parse_agm(const unsigned char buf[],
 573                                 struct synaptics_data *priv,
 574                                 struct synaptics_hw_state *hw)
 575 {
 576         struct synaptics_hw_state *agm = &priv->agm;
 577         int agm_packet_type;
 578
 579         agm_packet_type = (buf[5] & 0x30) >> 4;
 580         switch (agm_packet_type) {
 581         case 1:
 582                 /* Gesture packet: (x, y, z) half resolution */
 583                 agm->w = hw->w;
 584                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 585                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 586                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 587                 break;
 588
 589         case 2:
 590                 /* AGM-CONTACT packet: we are only interested in the count */
 591                 priv->agm_count = buf[1];
 592                 break;
 593
 594         default:
 595                 break;
 596         }
 597 }
 598
 599 static bool is_forcepad;
 600
 601 static int synaptics_parse_hw_state(const unsigned char buf[],
 602                                     struct synaptics_data *priv,
 603                                     struct synaptics_hw_state *hw)
 604 {
 605         memset(hw, 0, sizeof(struct synaptics_hw_state));
 606
 607         if (SYN_MODEL_NEWABS(priv->model_id)) {
 608                 hw->w = (((buf[0] & 0x30) >> 2) |
 609                          ((buf[0] & 0x04) >> 1) |
 610                          ((buf[3] & 0x04) >> 2));
 611
 612                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 613                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 614                     hw->w == 2) {
 615                         synaptics_parse_agm(buf, priv, hw);
 616                         return 1;
 617                 }
 618
 619                 hw->x = (((buf[3] & 0x10) << 8) |
 620                          ((buf[1] & 0x0f) << 8) |
 621                          buf[4]);
 622                 hw->y = (((buf[3] & 0x20) << 7) |
 623                          ((buf[1] & 0xf0) << 4) |
 624                          buf[5]);
 625                 hw->z = buf[2];
 626
 627                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 628                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 629
 630                 if (is_forcepad) {
 631                         /*
 632                          * ForcePads, like Clickpads, use middle button
 633                          * bits to report primary button clicks.
 634                          * Unfortunately they report primary button not
 635                          * only when user presses on the pad above certain
 636                          * threshold, but also when there are more than one
 637                          * finger on the touchpad, which interferes with
 638                          * out multi-finger gestures.
 639                          */
 640                         if (hw->z == 0) {
 641                                 /* No contacts */
 642                                 priv->press = priv->report_press = false;
 643                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 644                                 /*
 645                                  * Single-finger touch with pressure above
 646                                  * the threshold. If pressure stays long
 647                                  * enough, we'll start reporting primary
 648                                  * button. We rely on the device continuing
 649                                  * sending data even if finger does not
 650                                  * move.
 651                                  */
 652                                 if  (!priv->press) {
 653                                         priv->press_start = jiffies;
 654                                         priv->press = true;
 655                                 } else if (time_after(jiffies,
 656                                                 priv->press_start +
 657                                                         msecs_to_jiffies(50))) {
 658                                         priv->report_press = true;
 659                                 }
 660                         } else {
 661                                 priv->press = false;
 662                         }
 663
 664                         hw->left = priv->report_press;
 665
 666                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 667                         /*
 668                          * Clickpad's button is transmitted as middle button,
 669                          * however, since it is primary button, we will report
 670                          * it as BTN_LEFT.
 671                          */
 672                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 673
 674                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 675                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 676                         if (hw->w == 2)
 677                                 hw->scroll = (signed char)(buf[1]);
 678                 }
 679
 680                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 681                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 682                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 683                 }
 684
 685                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 686                     ((buf[0] ^ buf[3]) & 0x02)) {
 687                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 688                         default:
 689                                 /*
 690                                  * if nExtBtn is greater than 8 it should be
 691                                  * considered invalid and treated as 0
 692                                  */
 693                                 break;
 694                         case 8:
 695                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 696                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 697                         case 6:
 698                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 699                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 700                         case 4:
 701                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 702                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 703                         case 2:
 704                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 705                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 706                         }
 707                 }
 708         } else {
 709                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 710                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 711
 712                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 713                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 714
 715                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 716                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 717         }
 718
 719         /*
 720          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 721          * is used by some firmware to indicate a finger at the edge of
 722          * the touchpad whose precise position cannot be determined, so
 723          * convert these values to the maximum axis value.
 724          */
 725         if (hw->x > X_MAX_POSITIVE)
 726                 hw->x -= 1 << ABS_POS_BITS;
 727         else if (hw->x == X_MAX_POSITIVE)
 728                 hw->x = XMAX;
 729
 730         if (hw->y > Y_MAX_POSITIVE)
 731                 hw->y -= 1 << ABS_POS_BITS;
 732         else if (hw->y == Y_MAX_POSITIVE)
 733                 hw->y = YMAX;
 734
 735         return 0;
 736 }
 737
 738 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 739                                           bool active, int x, int y)
 740 {
 741         input_mt_slot(dev, slot);
 742         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 743         if (active) {
 744                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 745                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 746         }
 747 }
 748
 749 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 750                                           const struct synaptics_hw_state *a,
 751                                           const struct synaptics_hw_state *b,
 752                                           int num_fingers)
 753 {
 754         if (num_fingers >= 2) {
 755                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 756                                               min(a->y, b->y));
 757                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 758                                               max(a->y, b->y));
 759         } else if (num_fingers == 1) {
 760                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 761                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 762         } else {
 763                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 764                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 765         }
 766 }
 767
 768 static void synaptics_report_buttons(struct psmouse *psmouse,
 769                                      const struct synaptics_hw_state *hw)
 770 {
 771         struct input_dev *dev = psmouse->dev;
 772         struct synaptics_data *priv = psmouse->private;
 773         int i;
 774
 775         input_report_key(dev, BTN_LEFT, hw->left);
 776         input_report_key(dev, BTN_RIGHT, hw->right);
 777
 778         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 779                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 780
 781         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 782                 input_report_key(dev, BTN_FORWARD, hw->up);
 783                 input_report_key(dev, BTN_BACK, hw->down);
 784         }
 785
 786         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 787                 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
 788 }
 789
 790 static void synaptics_report_mt_data(struct psmouse *psmouse,
 791                                      const struct synaptics_hw_state *sgm,
 792                                      int num_fingers)
 793 {
 794         struct input_dev *dev = psmouse->dev;
 795         struct synaptics_data *priv = psmouse->private;
 796         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 797         struct input_mt_pos pos[2];
 798         int slot[2], nsemi, i;
 799
 800         nsemi = clamp_val(num_fingers, 0, 2);
 801
 802         for (i = 0; i < nsemi; i++) {
 803                 pos[i].x = hw[i]->x;
 804                 pos[i].y = synaptics_invert_y(hw[i]->y);
 805         }
 806
 807         input_mt_assign_slots(dev, slot, pos, nsemi);
 808
 809         for (i = 0; i < nsemi; i++) {
 810                 input_mt_slot(dev, slot[i]);
 811                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 812                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 813                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 814                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 815         }
 816
 817         input_mt_drop_unused(dev);
 818
 819         /* Don't use active slot count to generate BTN_TOOL events. */
 820         input_mt_report_pointer_emulation(dev, false);
 821
 822         /* Send the number of fingers reported by touchpad itself. */
 823         input_mt_report_finger_count(dev, num_fingers);
 824
 825         synaptics_report_buttons(psmouse, sgm);
 826
 827         input_sync(dev);
 828 }
 829
 830 static void synaptics_image_sensor_process(struct psmouse *psmouse,
 831                                            struct synaptics_hw_state *sgm)
 832 {
 833         struct synaptics_data *priv = psmouse->private;
 834         int num_fingers;
 835
 836         /*
 837          * Update mt_state using the new finger count and current mt_state.
 838          */
 839         if (sgm->z == 0)
 840                 num_fingers = 0;
 841         else if (sgm->w >= 4)
 842                 num_fingers = 1;
 843         else if (sgm->w == 0)
 844                 num_fingers = 2;
 845         else if (sgm->w == 1)
 846                 num_fingers = priv->agm_count ? priv->agm_count : 3;
 847         else
 848                 num_fingers = 4;
 849
 850         /* Send resulting input events to user space */
 851         synaptics_report_mt_data(psmouse, sgm, num_fingers);
 852 }
 853
 854 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
 855                                              struct synaptics_hw_state *sgm,
 856                                              int num_fingers)
 857 {
 858         struct input_dev *dev = psmouse->dev;
 859         struct synaptics_data *priv = psmouse->private;
 860         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 861         struct input_mt_pos pos[2];
 862         int slot[2], nsemi, i;
 863
 864         nsemi = clamp_val(num_fingers, 0, 2);
 865
 866         for (i = 0; i < nsemi; i++) {
 867                 pos[i].x = hw[i]->x;
 868                 pos[i].y = synaptics_invert_y(hw[i]->y);
 869         }
 870
 871         input_mt_assign_slots(dev, slot, pos, nsemi);
 872
 873         for (i = 0; i < nsemi; i++) {
 874                 input_mt_slot(dev, slot[i]);
 875                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 876                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 877                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 878                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 879         }
 880
 881         input_mt_drop_unused(dev);
 882         input_mt_report_pointer_emulation(dev, false);
 883         input_mt_report_finger_count(dev, num_fingers);
 884
 885         synaptics_report_buttons(psmouse, sgm);
 886
 887         input_sync(dev);
 888 }
 889
 890 /*
 891  *  called for each full received packet from the touchpad
 892  */
 893 static void synaptics_process_packet(struct psmouse *psmouse)
 894 {
 895         struct input_dev *dev = psmouse->dev;
 896         struct synaptics_data *priv = psmouse->private;
 897         struct synaptics_hw_state hw;
 898         int num_fingers;
 899         int finger_width;
 900
 901         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 902                 return;
 903
 904         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 905                 synaptics_image_sensor_process(psmouse, &hw);
 906                 return;
 907         }
 908
 909         if (hw.scroll) {
 910                 priv->scroll += hw.scroll;
 911
 912                 while (priv->scroll >= 4) {
 913                         input_report_key(dev, BTN_BACK, !hw.down);
 914                         input_sync(dev);
 915                         input_report_key(dev, BTN_BACK, hw.down);
 916                         input_sync(dev);
 917                         priv->scroll -= 4;
 918                 }
 919                 while (priv->scroll <= -4) {
 920                         input_report_key(dev, BTN_FORWARD, !hw.up);
 921                         input_sync(dev);
 922                         input_report_key(dev, BTN_FORWARD, hw.up);
 923                         input_sync(dev);
 924                         priv->scroll += 4;
 925                 }
 926                 return;
 927         }
 928
 929         if (hw.z > 0 && hw.x > 1) {
 930                 num_fingers = 1;
 931                 finger_width = 5;
 932                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 933                         switch (hw.w) {
 934                         case 0 ... 1:
 935                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 936                                         num_fingers = hw.w + 2;
 937                                 break;
 938                         case 2:
 939                                 if (SYN_MODEL_PEN(priv->model_id))
 940                                         ;   /* Nothing, treat a pen as a single finger */
 941                                 break;
 942                         case 4 ... 15:
 943                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 944                                         finger_width = hw.w;
 945                                 break;
 946                         }
 947                 }
 948         } else {
 949                 num_fingers = 0;
 950                 finger_width = 0;
 951         }
 952
 953         if (cr48_profile_sensor) {
 954                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
 955                 return;
 956         }
 957
 958         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 959                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
 960                                               num_fingers);
 961
 962         /* Post events
 963          * BTN_TOUCH has to be first as mousedev relies on it when doing
 964          * absolute -> relative conversion
 965          */
 966         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 967         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 968
 969         if (num_fingers > 0) {
 970                 input_report_abs(dev, ABS_X, hw.x);
 971                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
 972         }
 973         input_report_abs(dev, ABS_PRESSURE, hw.z);
 974
 975         if (SYN_CAP_PALMDETECT(priv->capabilities))
 976                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 977
 978         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 979         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 980                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 981                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 982         }
 983
 984         synaptics_report_buttons(psmouse, &hw);
 985
 986         input_sync(dev);
 987 }
 988
 989 static int synaptics_validate_byte(struct psmouse *psmouse,
 990                                    int idx, unsigned char pkt_type)
 991 {
 992         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 993         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 994         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 995         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 996         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 997         const char *packet = psmouse->packet;
 998
 999         if (idx < 0 || idx > 4)
1000                 return 0;
1001
1002         switch (pkt_type) {
1003
1004         case SYN_NEWABS:
1005         case SYN_NEWABS_RELAXED:
1006                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1007
1008         case SYN_NEWABS_STRICT:
1009                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1010
1011         case SYN_OLDABS:
1012                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1013
1014         default:
1015                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1016                 return 0;
1017         }
1018 }
1019
1020 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1021 {
1022         int i;
1023
1024         for (i = 0; i < 5; i++)
1025                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1026                         psmouse_info(psmouse, "using relaxed packet validation\n");
1027                         return SYN_NEWABS_RELAXED;
1028                 }
1029
1030         return SYN_NEWABS_STRICT;
1031 }
1032
1033 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1034 {
1035         struct synaptics_data *priv = psmouse->private;
1036
1037         if (psmouse->pktcnt >= 6) { /* Full packet received */
1038                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1039                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1040
1041                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1042                     synaptics_is_pt_packet(psmouse->packet)) {
1043                         if (priv->pt_port)
1044                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1045                 } else
1046                         synaptics_process_packet(psmouse);
1047
1048                 return PSMOUSE_FULL_PACKET;
1049         }
1050
1051         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1052                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1053 }
1054
1055 /*****************************************************************************
1056  *      Driver initialization/cleanup functions
1057  ****************************************************************************/
1058 static void set_abs_position_params(struct input_dev *dev,
1059                                     struct synaptics_data *priv, int x_code,
1060                                     int y_code)
1061 {
1062         int x_min = priv->x_min ?: XMIN_NOMINAL;
1063         int x_max = priv->x_max ?: XMAX_NOMINAL;
1064         int y_min = priv->y_min ?: YMIN_NOMINAL;
1065         int y_max = priv->y_max ?: YMAX_NOMINAL;
1066         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1067                         SYN_REDUCED_FILTER_FUZZ : 0;
1068
1069         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1070         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1071         input_abs_set_res(dev, x_code, priv->x_res);
1072         input_abs_set_res(dev, y_code, priv->y_res);
1073 }
1074
1075 static void set_input_params(struct psmouse *psmouse,
1076                              struct synaptics_data *priv)
1077 {
1078         struct input_dev *dev = psmouse->dev;
1079         int i;
1080
1081         /* Things that apply to both modes */
1082         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1083         __set_bit(EV_KEY, dev->evbit);
1084         __set_bit(BTN_LEFT, dev->keybit);
1085         __set_bit(BTN_RIGHT, dev->keybit);
1086
1087         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1088                 __set_bit(BTN_MIDDLE, dev->keybit);
1089
1090         if (!priv->absolute_mode) {
1091                 /* Relative mode */
1092                 __set_bit(EV_REL, dev->evbit);
1093                 __set_bit(REL_X, dev->relbit);
1094                 __set_bit(REL_Y, dev->relbit);
1095                 return;
1096         }
1097
1098         /* Absolute mode */
1099         __set_bit(EV_ABS, dev->evbit);
1100         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1101         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1102
1103         if (cr48_profile_sensor)
1104                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1105
1106         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1107                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1108                                         ABS_MT_POSITION_Y);
1109                 /* Image sensors can report per-contact pressure */
1110                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1111                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1112
1113                 /* Image sensors can signal 4 and 5 finger clicks */
1114                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1115                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1116         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1117                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1118                                         ABS_MT_POSITION_Y);
1119                 /*
1120                  * Profile sensor in CR-48 tracks contacts reasonably well,
1121                  * other non-image sensors with AGM use semi-mt.
1122                  */
1123                 input_mt_init_slots(dev, 2,
1124                                     INPUT_MT_POINTER |
1125                                     (cr48_profile_sensor ?
1126                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1127         }
1128
1129         if (SYN_CAP_PALMDETECT(priv->capabilities))
1130                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1131
1132         __set_bit(BTN_TOUCH, dev->keybit);
1133         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1134
1135         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1136                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1137                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1138         }
1139
1140         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1141             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1142                 __set_bit(BTN_FORWARD, dev->keybit);
1143                 __set_bit(BTN_BACK, dev->keybit);
1144         }
1145
1146         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1147                 __set_bit(BTN_0 + i, dev->keybit);
1148
1149         __clear_bit(EV_REL, dev->evbit);
1150         __clear_bit(REL_X, dev->relbit);
1151         __clear_bit(REL_Y, dev->relbit);
1152
1153         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1154                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1155                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1156                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1157                 /* Clickpads report only left button */
1158                 __clear_bit(BTN_RIGHT, dev->keybit);
1159                 __clear_bit(BTN_MIDDLE, dev->keybit);
1160         }
1161 }
1162
1163 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1164                                               void *data, char *buf)
1165 {
1166         struct synaptics_data *priv = psmouse->private;
1167
1168         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1169 }
1170
1171 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1172                                              void *data, const char *buf,
1173                                              size_t len)
1174 {
1175         struct synaptics_data *priv = psmouse->private;
1176         unsigned int value;
1177         int err;
1178
1179         err = kstrtouint(buf, 10, &value);
1180         if (err)
1181                 return err;
1182
1183         if (value > 1)
1184                 return -EINVAL;
1185
1186         if (value == priv->disable_gesture)
1187                 return len;
1188
1189         priv->disable_gesture = value;
1190         if (value)
1191                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1192         else
1193                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1194
1195         if (synaptics_mode_cmd(psmouse, priv->mode))
1196                 return -EIO;
1197
1198         return len;
1199 }
1200
1201 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1202                     synaptics_show_disable_gesture,
1203                     synaptics_set_disable_gesture);
1204
1205 static void synaptics_disconnect(struct psmouse *psmouse)
1206 {
1207         struct synaptics_data *priv = psmouse->private;
1208
1209         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1210                 device_remove_file(&psmouse->ps2dev.serio->dev,
1211                                    &psmouse_attr_disable_gesture.dattr);
1212
1213         synaptics_reset(psmouse);
1214         kfree(priv);
1215         psmouse->private = NULL;
1216 }
1217
1218 static int synaptics_reconnect(struct psmouse *psmouse)
1219 {
1220         struct synaptics_data *priv = psmouse->private;
1221         struct synaptics_data old_priv = *priv;
1222         unsigned char param[2];
1223         int retry = 0;
1224         int error;
1225
1226         do {
1227                 psmouse_reset(psmouse);
1228                 if (retry) {
1229                         /*
1230                          * On some boxes, right after resuming, the touchpad
1231                          * needs some time to finish initializing (I assume
1232                          * it needs time to calibrate) and start responding
1233                          * to Synaptics-specific queries, so let's wait a
1234                          * bit.
1235                          */
1236                         ssleep(1);
1237                 }
1238                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1239                 error = synaptics_detect(psmouse, 0);
1240         } while (error && ++retry < 3);
1241
1242         if (error)
1243                 return -1;
1244
1245         if (retry > 1)
1246                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1247
1248         if (synaptics_query_hardware(psmouse)) {
1249                 psmouse_err(psmouse, "Unable to query device.\n");
1250                 return -1;
1251         }
1252
1253         if (synaptics_set_mode(psmouse)) {
1254                 psmouse_err(psmouse, "Unable to initialize device.\n");
1255                 return -1;
1256         }
1257
1258         if (old_priv.identity != priv->identity ||
1259             old_priv.model_id != priv->model_id ||
1260             old_priv.capabilities != priv->capabilities ||
1261             old_priv.ext_cap != priv->ext_cap) {
1262                 psmouse_err(psmouse,
1263                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1264                             old_priv.identity, priv->identity,
1265                             old_priv.model_id, priv->model_id,
1266                             old_priv.capabilities, priv->capabilities,
1267                             old_priv.ext_cap, priv->ext_cap);
1268                 return -1;
1269         }
1270
1271         return 0;
1272 }
1273
1274 static bool impaired_toshiba_kbc;
1275
1276 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1277 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1278         {
1279                 /* Toshiba Satellite */
1280                 .matches = {
1281                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1282                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1283                 },
1284         },
1285         {
1286                 /* Toshiba Dynabook */
1287                 .matches = {
1288                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1289                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1290                 },
1291         },
1292         {
1293                 /* Toshiba Portege M300 */
1294                 .matches = {
1295                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1296                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1297                 },
1298
1299         },
1300         {
1301                 /* Toshiba Portege M300 */
1302                 .matches = {
1303                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1304                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1305                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1306                 },
1307
1308         },
1309 #endif
1310         { }
1311 };
1312
1313 static bool broken_olpc_ec;
1314
1315 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1316 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1317         {
1318                 /* OLPC XO-1 or XO-1.5 */
1319                 .matches = {
1320                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1321                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1322                 },
1323         },
1324 #endif
1325         { }
1326 };
1327
1328 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1329 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1330         {
1331                 /* Cr-48 Chromebook (Codename Mario) */
1332                 .matches = {
1333                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1334                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1335                 },
1336         },
1337 #endif
1338         { }
1339 };
1340
1341 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1342 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1343         {
1344                 .matches = {
1345                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1346                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1347                 },
1348         },
1349 #endif
1350         { }
1351 };
1352
1353 void __init synaptics_module_init(void)
1354 {
1355         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1356         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1357         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1358
1359         /*
1360          * Unfortunately ForcePad capability is not exported over PS/2,
1361          * so we have to resort to checking DMI.
1362          */
1363         is_forcepad = dmi_check_system(forcepad_dmi_table);
1364 }
1365
1366 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1367 {
1368         struct synaptics_data *priv;
1369         int err = -1;
1370
1371         /*
1372          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1373          * packet spew overloads the EC such that key presses on the keyboard
1374          * are missed.  Given that, don't even attempt to use Absolute mode.
1375          * Relative mode seems to work just fine.
1376          */
1377         if (absolute_mode && broken_olpc_ec) {
1378                 psmouse_info(psmouse,
1379                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1380                 return -ENODEV;
1381         }
1382
1383         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1384         if (!priv)
1385                 return -ENOMEM;
1386
1387         psmouse_reset(psmouse);
1388
1389         if (synaptics_query_hardware(psmouse)) {
1390                 psmouse_err(psmouse, "Unable to query device.\n");
1391                 goto init_fail;
1392         }
1393
1394         priv->absolute_mode = absolute_mode;
1395         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1396                 priv->disable_gesture = true;
1397
1398         if (synaptics_set_mode(psmouse)) {
1399                 psmouse_err(psmouse, "Unable to initialize device.\n");
1400                 goto init_fail;
1401         }
1402
1403         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1404
1405         psmouse_info(psmouse,
1406                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1407                      SYN_ID_MODEL(priv->identity),
1408                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1409                      priv->model_id,
1410                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1411                      priv->board_id, priv->firmware_id);
1412
1413         set_input_params(psmouse, priv);
1414
1415         /*
1416          * Encode touchpad model so that it can be used to set
1417          * input device->id.version and be visible to userspace.
1418          * Because version is __u16 we have to drop something.
1419          * Hardware info bits seem to be good candidates as they
1420          * are documented to be for Synaptics corp. internal use.
1421          */
1422         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1423                           (priv->model_id & 0x000000ff);
1424
1425         if (absolute_mode) {
1426                 psmouse->protocol_handler = synaptics_process_byte;
1427                 psmouse->pktsize = 6;
1428         } else {
1429                 /* Relative mode follows standard PS/2 mouse protocol */
1430                 psmouse->protocol_handler = psmouse_process_byte;
1431                 psmouse->pktsize = 3;
1432         }
1433
1434         psmouse->set_rate = synaptics_set_rate;
1435         psmouse->disconnect = synaptics_disconnect;
1436         psmouse->reconnect = synaptics_reconnect;
1437         psmouse->cleanup = synaptics_reset;
1438         /* Synaptics can usually stay in sync without extra help */
1439         psmouse->resync_time = 0;
1440
1441         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1442                 synaptics_pt_create(psmouse);
1443
1444         /*
1445          * Toshiba's KBC seems to have trouble handling data from
1446          * Synaptics at full rate.  Switch to a lower rate (roughly
1447          * the same rate as a standard PS/2 mouse).
1448          */
1449         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1450                 psmouse_info(psmouse,
1451                              "Toshiba %s detected, limiting rate to 40pps.\n",
1452                              dmi_get_system_info(DMI_PRODUCT_NAME));
1453                 psmouse->rate = 40;
1454         }
1455
1456         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1457                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1458                                          &psmouse_attr_disable_gesture.dattr);
1459                 if (err) {
1460                         psmouse_err(psmouse,
1461                                     "Failed to create disable_gesture attribute (%d)",
1462                                     err);
1463                         goto init_fail;
1464                 }
1465         }
1466
1467         return 0;
1468
1469  init_fail:
1470         kfree(priv);
1471         return err;
1472 }
1473
1474 int synaptics_init(struct psmouse *psmouse)
1475 {
1476         return __synaptics_init(psmouse, true);
1477 }
1478
1479 int synaptics_init_relative(struct psmouse *psmouse)
1480 {
1481         return __synaptics_init(psmouse, false);
1482 }
1483
1484 bool synaptics_supported(void)
1485 {
1486         return true;
1487 }
1488
1489 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1490
1491 void __init synaptics_module_init(void)
1492 {
1493 }
1494
1495 int synaptics_init(struct psmouse *psmouse)
1496 {
1497         return -ENOSYS;
1498 }
1499
1500 bool synaptics_supported(void)
1501 {
1502         return false;
1503 }
1504
1505 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */