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 /*
 855  *  called for each full received packet from the touchpad
 856  */
 857 static void synaptics_process_packet(struct psmouse *psmouse)
 858 {
 859         struct input_dev *dev = psmouse->dev;
 860         struct synaptics_data *priv = psmouse->private;
 861         struct synaptics_hw_state hw;
 862         int num_fingers;
 863         int finger_width;
 864
 865         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 866                 return;
 867
 868         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 869                 synaptics_image_sensor_process(psmouse, &hw);
 870                 return;
 871         }
 872
 873         if (hw.scroll) {
 874                 priv->scroll += hw.scroll;
 875
 876                 while (priv->scroll >= 4) {
 877                         input_report_key(dev, BTN_BACK, !hw.down);
 878                         input_sync(dev);
 879                         input_report_key(dev, BTN_BACK, hw.down);
 880                         input_sync(dev);
 881                         priv->scroll -= 4;
 882                 }
 883                 while (priv->scroll <= -4) {
 884                         input_report_key(dev, BTN_FORWARD, !hw.up);
 885                         input_sync(dev);
 886                         input_report_key(dev, BTN_FORWARD, hw.up);
 887                         input_sync(dev);
 888                         priv->scroll += 4;
 889                 }
 890                 return;
 891         }
 892
 893         if (hw.z > 0 && hw.x > 1) {
 894                 num_fingers = 1;
 895                 finger_width = 5;
 896                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 897                         switch (hw.w) {
 898                         case 0 ... 1:
 899                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 900                                         num_fingers = hw.w + 2;
 901                                 break;
 902                         case 2:
 903                                 if (SYN_MODEL_PEN(priv->model_id))
 904                                         ;   /* Nothing, treat a pen as a single finger */
 905                                 break;
 906                         case 4 ... 15:
 907                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 908                                         finger_width = hw.w;
 909                                 break;
 910                         }
 911                 }
 912         } else {
 913                 num_fingers = 0;
 914                 finger_width = 0;
 915         }
 916
 917         if (cr48_profile_sensor) {
 918                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
 919                 return;
 920         }
 921
 922         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 923                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
 924                                               num_fingers);
 925
 926         /* Post events
 927          * BTN_TOUCH has to be first as mousedev relies on it when doing
 928          * absolute -> relative conversion
 929          */
 930         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 931         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 932
 933         if (num_fingers > 0) {
 934                 input_report_abs(dev, ABS_X, hw.x);
 935                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
 936         }
 937         input_report_abs(dev, ABS_PRESSURE, hw.z);
 938
 939         if (SYN_CAP_PALMDETECT(priv->capabilities))
 940                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 941
 942         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 943         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 944                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 945                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 946         }
 947
 948         synaptics_report_buttons(psmouse, &hw);
 949
 950         input_sync(dev);
 951 }
 952
 953 static int synaptics_validate_byte(struct psmouse *psmouse,
 954                                    int idx, unsigned char pkt_type)
 955 {
 956         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 957         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 958         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 959         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 960         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 961         const char *packet = psmouse->packet;
 962
 963         if (idx < 0 || idx > 4)
 964                 return 0;
 965
 966         switch (pkt_type) {
 967
 968         case SYN_NEWABS:
 969         case SYN_NEWABS_RELAXED:
 970                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 971
 972         case SYN_NEWABS_STRICT:
 973                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 974
 975         case SYN_OLDABS:
 976                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 977
 978         default:
 979                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
 980                 return 0;
 981         }
 982 }
 983
 984 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 985 {
 986         int i;
 987
 988         for (i = 0; i < 5; i++)
 989                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
 990                         psmouse_info(psmouse, "using relaxed packet validation\n");
 991                         return SYN_NEWABS_RELAXED;
 992                 }
 993
 994         return SYN_NEWABS_STRICT;
 995 }
 996
 997 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 998 {
 999         struct synaptics_data *priv = psmouse->private;
1000
1001         if (psmouse->pktcnt >= 6) { /* Full packet received */
1002                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1003                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1004
1005                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1006                     synaptics_is_pt_packet(psmouse->packet)) {
1007                         if (priv->pt_port)
1008                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1009                 } else
1010                         synaptics_process_packet(psmouse);
1011
1012                 return PSMOUSE_FULL_PACKET;
1013         }
1014
1015         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1016                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1017 }
1018
1019 /*****************************************************************************
1020  *      Driver initialization/cleanup functions
1021  ****************************************************************************/
1022 static void set_abs_position_params(struct input_dev *dev,
1023                                     struct synaptics_data *priv, int x_code,
1024                                     int y_code)
1025 {
1026         int x_min = priv->x_min ?: XMIN_NOMINAL;
1027         int x_max = priv->x_max ?: XMAX_NOMINAL;
1028         int y_min = priv->y_min ?: YMIN_NOMINAL;
1029         int y_max = priv->y_max ?: YMAX_NOMINAL;
1030         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1031                         SYN_REDUCED_FILTER_FUZZ : 0;
1032
1033         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1034         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1035         input_abs_set_res(dev, x_code, priv->x_res);
1036         input_abs_set_res(dev, y_code, priv->y_res);
1037 }
1038
1039 static void set_input_params(struct psmouse *psmouse,
1040                              struct synaptics_data *priv)
1041 {
1042         struct input_dev *dev = psmouse->dev;
1043         int i;
1044
1045         /* Things that apply to both modes */
1046         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1047         __set_bit(EV_KEY, dev->evbit);
1048         __set_bit(BTN_LEFT, dev->keybit);
1049         __set_bit(BTN_RIGHT, dev->keybit);
1050
1051         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1052                 __set_bit(BTN_MIDDLE, dev->keybit);
1053
1054         if (!priv->absolute_mode) {
1055                 /* Relative mode */
1056                 __set_bit(EV_REL, dev->evbit);
1057                 __set_bit(REL_X, dev->relbit);
1058                 __set_bit(REL_Y, dev->relbit);
1059                 return;
1060         }
1061
1062         /* Absolute mode */
1063         __set_bit(EV_ABS, dev->evbit);
1064         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1065         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1066
1067         if (cr48_profile_sensor)
1068                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1069
1070         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1071                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1072                                         ABS_MT_POSITION_Y);
1073                 /* Image sensors can report per-contact pressure */
1074                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1075                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1076
1077                 /* Image sensors can signal 4 and 5 finger clicks */
1078                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1079                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1080         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1081                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1082                                         ABS_MT_POSITION_Y);
1083                 /*
1084                  * Profile sensor in CR-48 tracks contacts reasonably well,
1085                  * other non-image sensors with AGM use semi-mt.
1086                  */
1087                 input_mt_init_slots(dev, 2,
1088                                     INPUT_MT_POINTER |
1089                                     (cr48_profile_sensor ?
1090                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1091         }
1092
1093         if (SYN_CAP_PALMDETECT(priv->capabilities))
1094                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1095
1096         __set_bit(BTN_TOUCH, dev->keybit);
1097         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1098
1099         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1100                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1101                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1102         }
1103
1104         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1105             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1106                 __set_bit(BTN_FORWARD, dev->keybit);
1107                 __set_bit(BTN_BACK, dev->keybit);
1108         }
1109
1110         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1111                 __set_bit(BTN_0 + i, dev->keybit);
1112
1113         __clear_bit(EV_REL, dev->evbit);
1114         __clear_bit(REL_X, dev->relbit);
1115         __clear_bit(REL_Y, dev->relbit);
1116
1117         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1118                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1119                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1120                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1121                 /* Clickpads report only left button */
1122                 __clear_bit(BTN_RIGHT, dev->keybit);
1123                 __clear_bit(BTN_MIDDLE, dev->keybit);
1124         }
1125 }
1126
1127 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1128                                               void *data, char *buf)
1129 {
1130         struct synaptics_data *priv = psmouse->private;
1131
1132         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1133 }
1134
1135 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1136                                              void *data, const char *buf,
1137                                              size_t len)
1138 {
1139         struct synaptics_data *priv = psmouse->private;
1140         unsigned int value;
1141         int err;
1142
1143         err = kstrtouint(buf, 10, &value);
1144         if (err)
1145                 return err;
1146
1147         if (value > 1)
1148                 return -EINVAL;
1149
1150         if (value == priv->disable_gesture)
1151                 return len;
1152
1153         priv->disable_gesture = value;
1154         if (value)
1155                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1156         else
1157                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1158
1159         if (synaptics_mode_cmd(psmouse, priv->mode))
1160                 return -EIO;
1161
1162         return len;
1163 }
1164
1165 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1166                     synaptics_show_disable_gesture,
1167                     synaptics_set_disable_gesture);
1168
1169 static void synaptics_disconnect(struct psmouse *psmouse)
1170 {
1171         struct synaptics_data *priv = psmouse->private;
1172
1173         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1174                 device_remove_file(&psmouse->ps2dev.serio->dev,
1175                                    &psmouse_attr_disable_gesture.dattr);
1176
1177         synaptics_reset(psmouse);
1178         kfree(priv);
1179         psmouse->private = NULL;
1180 }
1181
1182 static int synaptics_reconnect(struct psmouse *psmouse)
1183 {
1184         struct synaptics_data *priv = psmouse->private;
1185         struct synaptics_data old_priv = *priv;
1186         unsigned char param[2];
1187         int retry = 0;
1188         int error;
1189
1190         do {
1191                 psmouse_reset(psmouse);
1192                 if (retry) {
1193                         /*
1194                          * On some boxes, right after resuming, the touchpad
1195                          * needs some time to finish initializing (I assume
1196                          * it needs time to calibrate) and start responding
1197                          * to Synaptics-specific queries, so let's wait a
1198                          * bit.
1199                          */
1200                         ssleep(1);
1201                 }
1202                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1203                 error = synaptics_detect(psmouse, 0);
1204         } while (error && ++retry < 3);
1205
1206         if (error)
1207                 return -1;
1208
1209         if (retry > 1)
1210                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1211
1212         if (synaptics_query_hardware(psmouse)) {
1213                 psmouse_err(psmouse, "Unable to query device.\n");
1214                 return -1;
1215         }
1216
1217         if (synaptics_set_mode(psmouse)) {
1218                 psmouse_err(psmouse, "Unable to initialize device.\n");
1219                 return -1;
1220         }
1221
1222         if (old_priv.identity != priv->identity ||
1223             old_priv.model_id != priv->model_id ||
1224             old_priv.capabilities != priv->capabilities ||
1225             old_priv.ext_cap != priv->ext_cap) {
1226                 psmouse_err(psmouse,
1227                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1228                             old_priv.identity, priv->identity,
1229                             old_priv.model_id, priv->model_id,
1230                             old_priv.capabilities, priv->capabilities,
1231                             old_priv.ext_cap, priv->ext_cap);
1232                 return -1;
1233         }
1234
1235         return 0;
1236 }
1237
1238 static bool impaired_toshiba_kbc;
1239
1240 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1241 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1242         {
1243                 /* Toshiba Satellite */
1244                 .matches = {
1245                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1246                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1247                 },
1248         },
1249         {
1250                 /* Toshiba Dynabook */
1251                 .matches = {
1252                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1253                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1254                 },
1255         },
1256         {
1257                 /* Toshiba Portege M300 */
1258                 .matches = {
1259                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1260                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1261                 },
1262
1263         },
1264         {
1265                 /* Toshiba Portege M300 */
1266                 .matches = {
1267                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1268                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1269                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1270                 },
1271
1272         },
1273 #endif
1274         { }
1275 };
1276
1277 static bool broken_olpc_ec;
1278
1279 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1280 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1281         {
1282                 /* OLPC XO-1 or XO-1.5 */
1283                 .matches = {
1284                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1285                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1286                 },
1287         },
1288 #endif
1289         { }
1290 };
1291
1292 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1293 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1294         {
1295                 /* Cr-48 Chromebook (Codename Mario) */
1296                 .matches = {
1297                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1298                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1299                 },
1300         },
1301 #endif
1302         { }
1303 };
1304
1305 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1306 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1307         {
1308                 .matches = {
1309                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1310                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1311                 },
1312         },
1313 #endif
1314         { }
1315 };
1316
1317 void __init synaptics_module_init(void)
1318 {
1319         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1320         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1321         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1322
1323         /*
1324          * Unfortunately ForcePad capability is not exported over PS/2,
1325          * so we have to resort to checking DMI.
1326          */
1327         is_forcepad = dmi_check_system(forcepad_dmi_table);
1328 }
1329
1330 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1331 {
1332         struct synaptics_data *priv;
1333         int err = -1;
1334
1335         /*
1336          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1337          * packet spew overloads the EC such that key presses on the keyboard
1338          * are missed.  Given that, don't even attempt to use Absolute mode.
1339          * Relative mode seems to work just fine.
1340          */
1341         if (absolute_mode && broken_olpc_ec) {
1342                 psmouse_info(psmouse,
1343                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1344                 return -ENODEV;
1345         }
1346
1347         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1348         if (!priv)
1349                 return -ENOMEM;
1350
1351         psmouse_reset(psmouse);
1352
1353         if (synaptics_query_hardware(psmouse)) {
1354                 psmouse_err(psmouse, "Unable to query device.\n");
1355                 goto init_fail;
1356         }
1357
1358         priv->absolute_mode = absolute_mode;
1359         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1360                 priv->disable_gesture = true;
1361
1362         if (synaptics_set_mode(psmouse)) {
1363                 psmouse_err(psmouse, "Unable to initialize device.\n");
1364                 goto init_fail;
1365         }
1366
1367         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1368
1369         psmouse_info(psmouse,
1370                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1371                      SYN_ID_MODEL(priv->identity),
1372                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1373                      priv->model_id,
1374                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1375                      priv->board_id, priv->firmware_id);
1376
1377         set_input_params(psmouse, priv);
1378
1379         /*
1380          * Encode touchpad model so that it can be used to set
1381          * input device->id.version and be visible to userspace.
1382          * Because version is __u16 we have to drop something.
1383          * Hardware info bits seem to be good candidates as they
1384          * are documented to be for Synaptics corp. internal use.
1385          */
1386         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1387                           (priv->model_id & 0x000000ff);
1388
1389         if (absolute_mode) {
1390                 psmouse->protocol_handler = synaptics_process_byte;
1391                 psmouse->pktsize = 6;
1392         } else {
1393                 /* Relative mode follows standard PS/2 mouse protocol */
1394                 psmouse->protocol_handler = psmouse_process_byte;
1395                 psmouse->pktsize = 3;
1396         }
1397
1398         psmouse->set_rate = synaptics_set_rate;
1399         psmouse->disconnect = synaptics_disconnect;
1400         psmouse->reconnect = synaptics_reconnect;
1401         psmouse->cleanup = synaptics_reset;
1402         /* Synaptics can usually stay in sync without extra help */
1403         psmouse->resync_time = 0;
1404
1405         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1406                 synaptics_pt_create(psmouse);
1407
1408         /*
1409          * Toshiba's KBC seems to have trouble handling data from
1410          * Synaptics at full rate.  Switch to a lower rate (roughly
1411          * the same rate as a standard PS/2 mouse).
1412          */
1413         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1414                 psmouse_info(psmouse,
1415                              "Toshiba %s detected, limiting rate to 40pps.\n",
1416                              dmi_get_system_info(DMI_PRODUCT_NAME));
1417                 psmouse->rate = 40;
1418         }
1419
1420         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1421                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1422                                          &psmouse_attr_disable_gesture.dattr);
1423                 if (err) {
1424                         psmouse_err(psmouse,
1425                                     "Failed to create disable_gesture attribute (%d)",
1426                                     err);
1427                         goto init_fail;
1428                 }
1429         }
1430
1431         return 0;
1432
1433  init_fail:
1434         kfree(priv);
1435         return err;
1436 }
1437
1438 int synaptics_init(struct psmouse *psmouse)
1439 {
1440         return __synaptics_init(psmouse, true);
1441 }
1442
1443 int synaptics_init_relative(struct psmouse *psmouse)
1444 {
1445         return __synaptics_init(psmouse, false);
1446 }
1447
1448 bool synaptics_supported(void)
1449 {
1450         return true;
1451 }
1452
1453 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1454
1455 void __init synaptics_module_init(void)
1456 {
1457 }
1458
1459 int synaptics_init(struct psmouse *psmouse)
1460 {
1461         return -ENOSYS;
1462 }
1463
1464 bool synaptics_supported(void)
1465 {
1466         return false;
1467 }
1468
1469 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */