drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /* maximum ABS_MT_POSITION displacement (in mm) */
  71 #define DMAX 10
  72
  73 /*****************************************************************************
  74  *      Stuff we need even when we do not want native Synaptics support
  75  ****************************************************************************/
  76
  77 /*
  78  * Set the synaptics touchpad mode byte by special commands
  79  */
  80 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  81 {
  82         unsigned char param[1];
  83
  84         if (psmouse_sliced_command(psmouse, mode))
  85                 return -1;
  86         param[0] = SYN_PS_SET_MODE2;
  87         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  88                 return -1;
  89         return 0;
  90 }
  91
  92 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  93 {
  94         struct ps2dev *ps2dev = &psmouse->ps2dev;
  95         unsigned char param[4];
  96
  97         param[0] = 0;
  98
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 101         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 104
 105         if (param[1] != 0x47)
 106                 return -ENODEV;
 107
 108         if (set_properties) {
 109                 psmouse->vendor = "Synaptics";
 110                 psmouse->name = "TouchPad";
 111         }
 112
 113         return 0;
 114 }
 115
 116 void synaptics_reset(struct psmouse *psmouse)
 117 {
 118         /* reset touchpad back to relative mode, gestures enabled */
 119         synaptics_mode_cmd(psmouse, 0);
 120 }
 121
 122 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 123
 124 static bool cr48_profile_sensor;
 125
 126 struct min_max_quirk {
 127         const char * const *pnp_ids;
 128         int x_min, x_max, y_min, y_max;
 129 };
 130
 131 static const struct min_max_quirk min_max_pnpid_table[] = {
 132         {
 133                 (const char * const []){"LEN0033", NULL},
 134                 1024, 5052, 2258, 4832
 135         },
 136         {
 137                 (const char * const []){"LEN0035", "LEN0042", NULL},
 138                 1232, 5710, 1156, 4696
 139         },
 140         {
 141                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 142                                         "LEN0039", "LEN2002", "LEN2004",
 143                                         NULL},
 144                 1024, 5112, 2024, 4832
 145         },
 146         {
 147                 (const char * const []){"LEN2001", NULL},
 148                 1024, 5022, 2508, 4832
 149         },
 150         {
 151                 (const char * const []){"LEN2006", NULL},
 152                 1264, 5675, 1171, 4688
 153         },
 154         { }
 155 };
 156
 157 /* This list has been kindly provided by Synaptics. */
 158 static const char * const topbuttonpad_pnp_ids[] = {
 159         "LEN0017",
 160         "LEN0018",
 161         "LEN0019",
 162         "LEN0023",
 163         "LEN002A",
 164         "LEN002B",
 165         "LEN002C",
 166         "LEN002D",
 167         "LEN002E",
 168         "LEN0033", /* Helix */
 169         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 170         "LEN0035", /* X240 */
 171         "LEN0036", /* T440 */
 172         "LEN0037", /* X1 Carbon 2nd */
 173         "LEN0038",
 174         "LEN0039", /* T440s */
 175         "LEN0041",
 176         "LEN0042", /* Yoga */
 177         "LEN0045",
 178         "LEN0046",
 179         "LEN0047",
 180         "LEN0048",
 181         "LEN0049",
 182         "LEN2000",
 183         "LEN2001", /* Edge E431 */
 184         "LEN2002", /* Edge E531 */
 185         "LEN2003",
 186         "LEN2004", /* L440 */
 187         "LEN2005",
 188         "LEN2006",
 189         "LEN2007",
 190         "LEN2008",
 191         "LEN2009",
 192         "LEN200A",
 193         "LEN200B",
 194         NULL
 195 };
 196
 197 /* This list has been kindly provided by Synaptics. */
 198 static const char * const forcepad_pnp_ids[] = {
 199         "SYN300D",
 200         "SYN3014",
 201         NULL
 202 };
 203
 204 /*****************************************************************************
 205  *      Synaptics communications functions
 206  ****************************************************************************/
 207
 208 /*
 209  * Synaptics touchpads report the y coordinate from bottom to top, which is
 210  * opposite from what userspace expects.
 211  * This function is used to invert y before reporting.
 212  */
 213 static int synaptics_invert_y(int y)
 214 {
 215         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 216 }
 217
 218 /*
 219  * Send a command to the synpatics touchpad by special commands
 220  */
 221 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 222 {
 223         if (psmouse_sliced_command(psmouse, c))
 224                 return -1;
 225         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 226                 return -1;
 227         return 0;
 228 }
 229
 230 /*
 231  * Read the model-id bytes from the touchpad
 232  * see also SYN_MODEL_* macros
 233  */
 234 static int synaptics_model_id(struct psmouse *psmouse)
 235 {
 236         struct synaptics_data *priv = psmouse->private;
 237         unsigned char mi[3];
 238
 239         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 240                 return -1;
 241         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 242         return 0;
 243 }
 244
 245 /*
 246  * Read the board id from the touchpad
 247  * The board id is encoded in the "QUERY MODES" response
 248  */
 249 static int synaptics_board_id(struct psmouse *psmouse)
 250 {
 251         struct synaptics_data *priv = psmouse->private;
 252         unsigned char bid[3];
 253
 254         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 255                 return -1;
 256         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 257         return 0;
 258 }
 259
 260 /*
 261  * Read the firmware id from the touchpad
 262  */
 263 static int synaptics_firmware_id(struct psmouse *psmouse)
 264 {
 265         struct synaptics_data *priv = psmouse->private;
 266         unsigned char fwid[3];
 267
 268         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 269                 return -1;
 270         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 271         return 0;
 272 }
 273
 274 /*
 275  * Read the capability-bits from the touchpad
 276  * see also the SYN_CAP_* macros
 277  */
 278 static int synaptics_capability(struct psmouse *psmouse)
 279 {
 280         struct synaptics_data *priv = psmouse->private;
 281         unsigned char cap[3];
 282
 283         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 284                 return -1;
 285         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 286         priv->ext_cap = priv->ext_cap_0c = 0;
 287
 288         /*
 289          * Older firmwares had submodel ID fixed to 0x47
 290          */
 291         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 292             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 293                 return -1;
 294         }
 295
 296         /*
 297          * Unless capExtended is set the rest of the flags should be ignored
 298          */
 299         if (!SYN_CAP_EXTENDED(priv->capabilities))
 300                 priv->capabilities = 0;
 301
 302         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 303                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 304                         psmouse_warn(psmouse,
 305                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 306                 } else {
 307                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 308
 309                         /*
 310                          * if nExtBtn is greater than 8 it should be considered
 311                          * invalid and treated as 0
 312                          */
 313                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 314                                 priv->ext_cap &= 0xff0fff;
 315                 }
 316         }
 317
 318         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 319                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 320                         psmouse_warn(psmouse,
 321                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 322                 } else {
 323                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 324                 }
 325         }
 326
 327         return 0;
 328 }
 329
 330 /*
 331  * Identify Touchpad
 332  * See also the SYN_ID_* macros
 333  */
 334 static int synaptics_identify(struct psmouse *psmouse)
 335 {
 336         struct synaptics_data *priv = psmouse->private;
 337         unsigned char id[3];
 338
 339         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 340                 return -1;
 341         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 342         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 343                 return 0;
 344         return -1;
 345 }
 346
 347 /*
 348  * Read touchpad resolution and maximum reported coordinates
 349  * Resolution is left zero if touchpad does not support the query
 350  */
 351
 352 static int synaptics_resolution(struct psmouse *psmouse)
 353 {
 354         struct synaptics_data *priv = psmouse->private;
 355         unsigned char resp[3];
 356         int i;
 357
 358         if (SYN_ID_MAJOR(priv->identity) < 4)
 359                 return 0;
 360
 361         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 362                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 363                         priv->x_res = resp[0]; /* x resolution in units/mm */
 364                         priv->y_res = resp[2]; /* y resolution in units/mm */
 365                 }
 366         }
 367
 368         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 369                 if (psmouse_matches_pnp_id(psmouse,
 370                                            min_max_pnpid_table[i].pnp_ids)) {
 371                         priv->x_min = min_max_pnpid_table[i].x_min;
 372                         priv->x_max = min_max_pnpid_table[i].x_max;
 373                         priv->y_min = min_max_pnpid_table[i].y_min;
 374                         priv->y_max = min_max_pnpid_table[i].y_max;
 375                         return 0;
 376                 }
 377         }
 378
 379         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 380             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 381                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 382                         psmouse_warn(psmouse,
 383                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 384                 } else {
 385                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 386                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 387                 }
 388         }
 389
 390         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 391             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 392                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 393                         psmouse_warn(psmouse,
 394                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 395                 } else {
 396                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 397                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 398                 }
 399         }
 400
 401         return 0;
 402 }
 403
 404 static int synaptics_query_hardware(struct psmouse *psmouse)
 405 {
 406         if (synaptics_identify(psmouse))
 407                 return -1;
 408         if (synaptics_model_id(psmouse))
 409                 return -1;
 410         if (synaptics_firmware_id(psmouse))
 411                 return -1;
 412         if (synaptics_board_id(psmouse))
 413                 return -1;
 414         if (synaptics_capability(psmouse))
 415                 return -1;
 416         if (synaptics_resolution(psmouse))
 417                 return -1;
 418
 419         return 0;
 420 }
 421
 422 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 423 {
 424         static unsigned char param = 0xc8;
 425         struct synaptics_data *priv = psmouse->private;
 426
 427         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 428               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 429                 return 0;
 430
 431         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 432                 return -1;
 433
 434         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 435                 return -1;
 436
 437         /* Advanced gesture mode also sends multi finger data */
 438         priv->capabilities |= BIT(1);
 439
 440         return 0;
 441 }
 442
 443 static int synaptics_set_mode(struct psmouse *psmouse)
 444 {
 445         struct synaptics_data *priv = psmouse->private;
 446
 447         priv->mode = 0;
 448         if (priv->absolute_mode)
 449                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 450         if (priv->disable_gesture)
 451                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 452         if (psmouse->rate >= 80)
 453                 priv->mode |= SYN_BIT_HIGH_RATE;
 454         if (SYN_CAP_EXTENDED(priv->capabilities))
 455                 priv->mode |= SYN_BIT_W_MODE;
 456
 457         if (synaptics_mode_cmd(psmouse, priv->mode))
 458                 return -1;
 459
 460         if (priv->absolute_mode &&
 461             synaptics_set_advanced_gesture_mode(psmouse)) {
 462                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 463                 return -1;
 464         }
 465
 466         return 0;
 467 }
 468
 469 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 470 {
 471         struct synaptics_data *priv = psmouse->private;
 472
 473         if (rate >= 80) {
 474                 priv->mode |= SYN_BIT_HIGH_RATE;
 475                 psmouse->rate = 80;
 476         } else {
 477                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 478                 psmouse->rate = 40;
 479         }
 480
 481         synaptics_mode_cmd(psmouse, priv->mode);
 482 }
 483
 484 /*****************************************************************************
 485  *      Synaptics pass-through PS/2 port support
 486  ****************************************************************************/
 487 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 488 {
 489         struct psmouse *parent = serio_get_drvdata(serio->parent);
 490         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 491
 492         if (psmouse_sliced_command(parent, c))
 493                 return -1;
 494         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 495                 return -1;
 496         return 0;
 497 }
 498
 499 static int synaptics_pt_start(struct serio *serio)
 500 {
 501         struct psmouse *parent = serio_get_drvdata(serio->parent);
 502         struct synaptics_data *priv = parent->private;
 503
 504         serio_pause_rx(parent->ps2dev.serio);
 505         priv->pt_port = serio;
 506         serio_continue_rx(parent->ps2dev.serio);
 507
 508         return 0;
 509 }
 510
 511 static void synaptics_pt_stop(struct serio *serio)
 512 {
 513         struct psmouse *parent = serio_get_drvdata(serio->parent);
 514         struct synaptics_data *priv = parent->private;
 515
 516         serio_pause_rx(parent->ps2dev.serio);
 517         priv->pt_port = NULL;
 518         serio_continue_rx(parent->ps2dev.serio);
 519 }
 520
 521 static int synaptics_is_pt_packet(unsigned char *buf)
 522 {
 523         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 524 }
 525
 526 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 527 {
 528         struct psmouse *child = serio_get_drvdata(ptport);
 529
 530         if (child && child->state == PSMOUSE_ACTIVATED) {
 531                 serio_interrupt(ptport, packet[1], 0);
 532                 serio_interrupt(ptport, packet[4], 0);
 533                 serio_interrupt(ptport, packet[5], 0);
 534                 if (child->pktsize == 4)
 535                         serio_interrupt(ptport, packet[2], 0);
 536         } else
 537                 serio_interrupt(ptport, packet[1], 0);
 538 }
 539
 540 static void synaptics_pt_activate(struct psmouse *psmouse)
 541 {
 542         struct synaptics_data *priv = psmouse->private;
 543         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 544
 545         /* adjust the touchpad to child's choice of protocol */
 546         if (child) {
 547                 if (child->pktsize == 4)
 548                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 549                 else
 550                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 551
 552                 if (synaptics_mode_cmd(psmouse, priv->mode))
 553                         psmouse_warn(psmouse,
 554                                      "failed to switch guest protocol\n");
 555         }
 556 }
 557
 558 static void synaptics_pt_create(struct psmouse *psmouse)
 559 {
 560         struct serio *serio;
 561
 562         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 563         if (!serio) {
 564                 psmouse_err(psmouse,
 565                             "not enough memory for pass-through port\n");
 566                 return;
 567         }
 568
 569         serio->id.type = SERIO_PS_PSTHRU;
 570         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 571         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 572         serio->write = synaptics_pt_write;
 573         serio->start = synaptics_pt_start;
 574         serio->stop = synaptics_pt_stop;
 575         serio->parent = psmouse->ps2dev.serio;
 576
 577         psmouse->pt_activate = synaptics_pt_activate;
 578
 579         psmouse_info(psmouse, "serio: %s port at %s\n",
 580                      serio->name, psmouse->phys);
 581         serio_register_port(serio);
 582 }
 583
 584 /*****************************************************************************
 585  *      Functions to interpret the absolute mode packets
 586  ****************************************************************************/
 587
 588 static void synaptics_parse_agm(const unsigned char buf[],
 589                                 struct synaptics_data *priv,
 590                                 struct synaptics_hw_state *hw)
 591 {
 592         struct synaptics_hw_state *agm = &priv->agm;
 593         int agm_packet_type;
 594
 595         agm_packet_type = (buf[5] & 0x30) >> 4;
 596         switch (agm_packet_type) {
 597         case 1:
 598                 /* Gesture packet: (x, y, z) half resolution */
 599                 agm->w = hw->w;
 600                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 601                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 602                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 603                 break;
 604
 605         case 2:
 606                 /* AGM-CONTACT packet: we are only interested in the count */
 607                 priv->agm_count = buf[1];
 608                 break;
 609
 610         default:
 611                 break;
 612         }
 613 }
 614
 615 static int synaptics_parse_hw_state(const unsigned char buf[],
 616                                     struct synaptics_data *priv,
 617                                     struct synaptics_hw_state *hw)
 618 {
 619         memset(hw, 0, sizeof(struct synaptics_hw_state));
 620
 621         if (SYN_MODEL_NEWABS(priv->model_id)) {
 622                 hw->w = (((buf[0] & 0x30) >> 2) |
 623                          ((buf[0] & 0x04) >> 1) |
 624                          ((buf[3] & 0x04) >> 2));
 625
 626                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 627                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 628                     hw->w == 2) {
 629                         synaptics_parse_agm(buf, priv, hw);
 630                         return 1;
 631                 }
 632
 633                 hw->x = (((buf[3] & 0x10) << 8) |
 634                          ((buf[1] & 0x0f) << 8) |
 635                          buf[4]);
 636                 hw->y = (((buf[3] & 0x20) << 7) |
 637                          ((buf[1] & 0xf0) << 4) |
 638                          buf[5]);
 639                 hw->z = buf[2];
 640
 641                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 642                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 643
 644                 if (priv->is_forcepad) {
 645                         /*
 646                          * ForcePads, like Clickpads, use middle button
 647                          * bits to report primary button clicks.
 648                          * Unfortunately they report primary button not
 649                          * only when user presses on the pad above certain
 650                          * threshold, but also when there are more than one
 651                          * finger on the touchpad, which interferes with
 652                          * out multi-finger gestures.
 653                          */
 654                         if (hw->z == 0) {
 655                                 /* No contacts */
 656                                 priv->press = priv->report_press = false;
 657                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 658                                 /*
 659                                  * Single-finger touch with pressure above
 660                                  * the threshold. If pressure stays long
 661                                  * enough, we'll start reporting primary
 662                                  * button. We rely on the device continuing
 663                                  * sending data even if finger does not
 664                                  * move.
 665                                  */
 666                                 if  (!priv->press) {
 667                                         priv->press_start = jiffies;
 668                                         priv->press = true;
 669                                 } else if (time_after(jiffies,
 670                                                 priv->press_start +
 671                                                         msecs_to_jiffies(50))) {
 672                                         priv->report_press = true;
 673                                 }
 674                         } else {
 675                                 priv->press = false;
 676                         }
 677
 678                         hw->left = priv->report_press;
 679
 680                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 681                         /*
 682                          * Clickpad's button is transmitted as middle button,
 683                          * however, since it is primary button, we will report
 684                          * it as BTN_LEFT.
 685                          */
 686                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 687
 688                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 689                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 690                         if (hw->w == 2)
 691                                 hw->scroll = (signed char)(buf[1]);
 692                 }
 693
 694                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 695                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 696                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 697                 }
 698
 699                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 700                     ((buf[0] ^ buf[3]) & 0x02)) {
 701                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 702                         default:
 703                                 /*
 704                                  * if nExtBtn is greater than 8 it should be
 705                                  * considered invalid and treated as 0
 706                                  */
 707                                 break;
 708                         case 8:
 709                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 710                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 711                         case 6:
 712                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 713                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 714                         case 4:
 715                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 716                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 717                         case 2:
 718                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 719                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 720                         }
 721                 }
 722         } else {
 723                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 724                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 725
 726                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 727                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 728
 729                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 730                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 731         }
 732
 733         /*
 734          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 735          * is used by some firmware to indicate a finger at the edge of
 736          * the touchpad whose precise position cannot be determined, so
 737          * convert these values to the maximum axis value.
 738          */
 739         if (hw->x > X_MAX_POSITIVE)
 740                 hw->x -= 1 << ABS_POS_BITS;
 741         else if (hw->x == X_MAX_POSITIVE)
 742                 hw->x = XMAX;
 743
 744         if (hw->y > Y_MAX_POSITIVE)
 745                 hw->y -= 1 << ABS_POS_BITS;
 746         else if (hw->y == Y_MAX_POSITIVE)
 747                 hw->y = YMAX;
 748
 749         return 0;
 750 }
 751
 752 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 753                                           bool active, int x, int y)
 754 {
 755         input_mt_slot(dev, slot);
 756         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 757         if (active) {
 758                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 759                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 760         }
 761 }
 762
 763 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 764                                           const struct synaptics_hw_state *a,
 765                                           const struct synaptics_hw_state *b,
 766                                           int num_fingers)
 767 {
 768         if (num_fingers >= 2) {
 769                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 770                                               min(a->y, b->y));
 771                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 772                                               max(a->y, b->y));
 773         } else if (num_fingers == 1) {
 774                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 775                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 776         } else {
 777                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 778                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 779         }
 780 }
 781
 782 static void synaptics_report_buttons(struct psmouse *psmouse,
 783                                      const struct synaptics_hw_state *hw)
 784 {
 785         struct input_dev *dev = psmouse->dev;
 786         struct synaptics_data *priv = psmouse->private;
 787         int i;
 788
 789         input_report_key(dev, BTN_LEFT, hw->left);
 790         input_report_key(dev, BTN_RIGHT, hw->right);
 791
 792         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 793                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 794
 795         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 796                 input_report_key(dev, BTN_FORWARD, hw->up);
 797                 input_report_key(dev, BTN_BACK, hw->down);
 798         }
 799
 800         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 801                 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
 802 }
 803
 804 static void synaptics_report_mt_data(struct psmouse *psmouse,
 805                                      const struct synaptics_hw_state *sgm,
 806                                      int num_fingers)
 807 {
 808         struct input_dev *dev = psmouse->dev;
 809         struct synaptics_data *priv = psmouse->private;
 810         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 811         struct input_mt_pos pos[2];
 812         int slot[2], nsemi, i;
 813
 814         nsemi = clamp_val(num_fingers, 0, 2);
 815
 816         for (i = 0; i < nsemi; i++) {
 817                 pos[i].x = hw[i]->x;
 818                 pos[i].y = synaptics_invert_y(hw[i]->y);
 819         }
 820
 821         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->x_res);
 822
 823         for (i = 0; i < nsemi; i++) {
 824                 input_mt_slot(dev, slot[i]);
 825                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 826                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 827                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 828                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 829         }
 830
 831         input_mt_drop_unused(dev);
 832
 833         /* Don't use active slot count to generate BTN_TOOL events. */
 834         input_mt_report_pointer_emulation(dev, false);
 835
 836         /* Send the number of fingers reported by touchpad itself. */
 837         input_mt_report_finger_count(dev, num_fingers);
 838
 839         synaptics_report_buttons(psmouse, sgm);
 840
 841         input_sync(dev);
 842 }
 843
 844 static void synaptics_image_sensor_process(struct psmouse *psmouse,
 845                                            struct synaptics_hw_state *sgm)
 846 {
 847         struct synaptics_data *priv = psmouse->private;
 848         int num_fingers;
 849
 850         /*
 851          * Update mt_state using the new finger count and current mt_state.
 852          */
 853         if (sgm->z == 0)
 854                 num_fingers = 0;
 855         else if (sgm->w >= 4)
 856                 num_fingers = 1;
 857         else if (sgm->w == 0)
 858                 num_fingers = 2;
 859         else if (sgm->w == 1)
 860                 num_fingers = priv->agm_count ? priv->agm_count : 3;
 861         else
 862                 num_fingers = 4;
 863
 864         /* Send resulting input events to user space */
 865         synaptics_report_mt_data(psmouse, sgm, num_fingers);
 866 }
 867
 868 /*
 869  *  called for each full received packet from the touchpad
 870  */
 871 static void synaptics_process_packet(struct psmouse *psmouse)
 872 {
 873         struct input_dev *dev = psmouse->dev;
 874         struct synaptics_data *priv = psmouse->private;
 875         struct synaptics_hw_state hw;
 876         int num_fingers;
 877         int finger_width;
 878
 879         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 880                 return;
 881
 882         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 883                 synaptics_image_sensor_process(psmouse, &hw);
 884                 return;
 885         }
 886
 887         if (hw.scroll) {
 888                 priv->scroll += hw.scroll;
 889
 890                 while (priv->scroll >= 4) {
 891                         input_report_key(dev, BTN_BACK, !hw.down);
 892                         input_sync(dev);
 893                         input_report_key(dev, BTN_BACK, hw.down);
 894                         input_sync(dev);
 895                         priv->scroll -= 4;
 896                 }
 897                 while (priv->scroll <= -4) {
 898                         input_report_key(dev, BTN_FORWARD, !hw.up);
 899                         input_sync(dev);
 900                         input_report_key(dev, BTN_FORWARD, hw.up);
 901                         input_sync(dev);
 902                         priv->scroll += 4;
 903                 }
 904                 return;
 905         }
 906
 907         if (hw.z > 0 && hw.x > 1) {
 908                 num_fingers = 1;
 909                 finger_width = 5;
 910                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 911                         switch (hw.w) {
 912                         case 0 ... 1:
 913                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 914                                         num_fingers = hw.w + 2;
 915                                 break;
 916                         case 2:
 917                                 if (SYN_MODEL_PEN(priv->model_id))
 918                                         ;   /* Nothing, treat a pen as a single finger */
 919                                 break;
 920                         case 4 ... 15:
 921                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 922                                         finger_width = hw.w;
 923                                 break;
 924                         }
 925                 }
 926         } else {
 927                 num_fingers = 0;
 928                 finger_width = 0;
 929         }
 930
 931         if (cr48_profile_sensor) {
 932                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
 933                 return;
 934         }
 935
 936         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 937                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
 938                                               num_fingers);
 939
 940         /* Post events
 941          * BTN_TOUCH has to be first as mousedev relies on it when doing
 942          * absolute -> relative conversion
 943          */
 944         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 945         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 946
 947         if (num_fingers > 0) {
 948                 input_report_abs(dev, ABS_X, hw.x);
 949                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
 950         }
 951         input_report_abs(dev, ABS_PRESSURE, hw.z);
 952
 953         if (SYN_CAP_PALMDETECT(priv->capabilities))
 954                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 955
 956         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 957         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 958                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 959                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 960         }
 961
 962         synaptics_report_buttons(psmouse, &hw);
 963
 964         input_sync(dev);
 965 }
 966
 967 static int synaptics_validate_byte(struct psmouse *psmouse,
 968                                    int idx, unsigned char pkt_type)
 969 {
 970         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 971         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 972         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 973         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 974         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 975         const char *packet = psmouse->packet;
 976
 977         if (idx < 0 || idx > 4)
 978                 return 0;
 979
 980         switch (pkt_type) {
 981
 982         case SYN_NEWABS:
 983         case SYN_NEWABS_RELAXED:
 984                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 985
 986         case SYN_NEWABS_STRICT:
 987                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 988
 989         case SYN_OLDABS:
 990                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 991
 992         default:
 993                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
 994                 return 0;
 995         }
 996 }
 997
 998 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 999 {
1000         int i;
1001
1002         for (i = 0; i < 5; i++)
1003                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1004                         psmouse_info(psmouse, "using relaxed packet validation\n");
1005                         return SYN_NEWABS_RELAXED;
1006                 }
1007
1008         return SYN_NEWABS_STRICT;
1009 }
1010
1011 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1012 {
1013         struct synaptics_data *priv = psmouse->private;
1014
1015         if (psmouse->pktcnt >= 6) { /* Full packet received */
1016                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1017                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1018
1019                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1020                     synaptics_is_pt_packet(psmouse->packet)) {
1021                         if (priv->pt_port)
1022                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1023                 } else
1024                         synaptics_process_packet(psmouse);
1025
1026                 return PSMOUSE_FULL_PACKET;
1027         }
1028
1029         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1030                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1031 }
1032
1033 /*****************************************************************************
1034  *      Driver initialization/cleanup functions
1035  ****************************************************************************/
1036 static void set_abs_position_params(struct input_dev *dev,
1037                                     struct synaptics_data *priv, int x_code,
1038                                     int y_code)
1039 {
1040         int x_min = priv->x_min ?: XMIN_NOMINAL;
1041         int x_max = priv->x_max ?: XMAX_NOMINAL;
1042         int y_min = priv->y_min ?: YMIN_NOMINAL;
1043         int y_max = priv->y_max ?: YMAX_NOMINAL;
1044         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1045                         SYN_REDUCED_FILTER_FUZZ : 0;
1046
1047         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1048         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1049         input_abs_set_res(dev, x_code, priv->x_res);
1050         input_abs_set_res(dev, y_code, priv->y_res);
1051 }
1052
1053 static void set_input_params(struct psmouse *psmouse,
1054                              struct synaptics_data *priv)
1055 {
1056         struct input_dev *dev = psmouse->dev;
1057         int i;
1058
1059         /* Things that apply to both modes */
1060         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1061         __set_bit(EV_KEY, dev->evbit);
1062         __set_bit(BTN_LEFT, dev->keybit);
1063         __set_bit(BTN_RIGHT, dev->keybit);
1064
1065         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1066                 __set_bit(BTN_MIDDLE, dev->keybit);
1067
1068         if (!priv->absolute_mode) {
1069                 /* Relative mode */
1070                 __set_bit(EV_REL, dev->evbit);
1071                 __set_bit(REL_X, dev->relbit);
1072                 __set_bit(REL_Y, dev->relbit);
1073                 return;
1074         }
1075
1076         /* Absolute mode */
1077         __set_bit(EV_ABS, dev->evbit);
1078         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1079         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1080
1081         if (cr48_profile_sensor)
1082                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1083
1084         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1085                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1086                                         ABS_MT_POSITION_Y);
1087                 /* Image sensors can report per-contact pressure */
1088                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1089                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1090
1091                 /* Image sensors can signal 4 and 5 finger clicks */
1092                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1093                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1094         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1095                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1096                                         ABS_MT_POSITION_Y);
1097                 /*
1098                  * Profile sensor in CR-48 tracks contacts reasonably well,
1099                  * other non-image sensors with AGM use semi-mt.
1100                  */
1101                 input_mt_init_slots(dev, 2,
1102                                     INPUT_MT_POINTER |
1103                                     (cr48_profile_sensor ?
1104                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1105         }
1106
1107         if (SYN_CAP_PALMDETECT(priv->capabilities))
1108                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1109
1110         __set_bit(BTN_TOUCH, dev->keybit);
1111         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1112
1113         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1114                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1115                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1116         }
1117
1118         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1119             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1120                 __set_bit(BTN_FORWARD, dev->keybit);
1121                 __set_bit(BTN_BACK, dev->keybit);
1122         }
1123
1124         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1125                 __set_bit(BTN_0 + i, dev->keybit);
1126
1127         __clear_bit(EV_REL, dev->evbit);
1128         __clear_bit(REL_X, dev->relbit);
1129         __clear_bit(REL_Y, dev->relbit);
1130
1131         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1132                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1133                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1134                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1135                 /* Clickpads report only left button */
1136                 __clear_bit(BTN_RIGHT, dev->keybit);
1137                 __clear_bit(BTN_MIDDLE, dev->keybit);
1138         }
1139 }
1140
1141 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1142                                               void *data, char *buf)
1143 {
1144         struct synaptics_data *priv = psmouse->private;
1145
1146         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1147 }
1148
1149 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1150                                              void *data, const char *buf,
1151                                              size_t len)
1152 {
1153         struct synaptics_data *priv = psmouse->private;
1154         unsigned int value;
1155         int err;
1156
1157         err = kstrtouint(buf, 10, &value);
1158         if (err)
1159                 return err;
1160
1161         if (value > 1)
1162                 return -EINVAL;
1163
1164         if (value == priv->disable_gesture)
1165                 return len;
1166
1167         priv->disable_gesture = value;
1168         if (value)
1169                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1170         else
1171                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1172
1173         if (synaptics_mode_cmd(psmouse, priv->mode))
1174                 return -EIO;
1175
1176         return len;
1177 }
1178
1179 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1180                     synaptics_show_disable_gesture,
1181                     synaptics_set_disable_gesture);
1182
1183 static void synaptics_disconnect(struct psmouse *psmouse)
1184 {
1185         struct synaptics_data *priv = psmouse->private;
1186
1187         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1188                 device_remove_file(&psmouse->ps2dev.serio->dev,
1189                                    &psmouse_attr_disable_gesture.dattr);
1190
1191         synaptics_reset(psmouse);
1192         kfree(priv);
1193         psmouse->private = NULL;
1194 }
1195
1196 static int synaptics_reconnect(struct psmouse *psmouse)
1197 {
1198         struct synaptics_data *priv = psmouse->private;
1199         struct synaptics_data old_priv = *priv;
1200         unsigned char param[2];
1201         int retry = 0;
1202         int error;
1203
1204         do {
1205                 psmouse_reset(psmouse);
1206                 if (retry) {
1207                         /*
1208                          * On some boxes, right after resuming, the touchpad
1209                          * needs some time to finish initializing (I assume
1210                          * it needs time to calibrate) and start responding
1211                          * to Synaptics-specific queries, so let's wait a
1212                          * bit.
1213                          */
1214                         ssleep(1);
1215                 }
1216                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1217                 error = synaptics_detect(psmouse, 0);
1218         } while (error && ++retry < 3);
1219
1220         if (error)
1221                 return -1;
1222
1223         if (retry > 1)
1224                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1225
1226         if (synaptics_query_hardware(psmouse)) {
1227                 psmouse_err(psmouse, "Unable to query device.\n");
1228                 return -1;
1229         }
1230
1231         if (synaptics_set_mode(psmouse)) {
1232                 psmouse_err(psmouse, "Unable to initialize device.\n");
1233                 return -1;
1234         }
1235
1236         if (old_priv.identity != priv->identity ||
1237             old_priv.model_id != priv->model_id ||
1238             old_priv.capabilities != priv->capabilities ||
1239             old_priv.ext_cap != priv->ext_cap) {
1240                 psmouse_err(psmouse,
1241                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1242                             old_priv.identity, priv->identity,
1243                             old_priv.model_id, priv->model_id,
1244                             old_priv.capabilities, priv->capabilities,
1245                             old_priv.ext_cap, priv->ext_cap);
1246                 return -1;
1247         }
1248
1249         return 0;
1250 }
1251
1252 static bool impaired_toshiba_kbc;
1253
1254 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1255 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1256         {
1257                 /* Toshiba Satellite */
1258                 .matches = {
1259                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1260                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1261                 },
1262         },
1263         {
1264                 /* Toshiba Dynabook */
1265                 .matches = {
1266                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1267                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1268                 },
1269         },
1270         {
1271                 /* Toshiba Portege M300 */
1272                 .matches = {
1273                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1274                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1275                 },
1276
1277         },
1278         {
1279                 /* Toshiba Portege M300 */
1280                 .matches = {
1281                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1282                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1283                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1284                 },
1285
1286         },
1287 #endif
1288         { }
1289 };
1290
1291 static bool broken_olpc_ec;
1292
1293 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1294 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1295         {
1296                 /* OLPC XO-1 or XO-1.5 */
1297                 .matches = {
1298                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1299                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1300                 },
1301         },
1302 #endif
1303         { }
1304 };
1305
1306 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1307 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1308         {
1309                 /* Cr-48 Chromebook (Codename Mario) */
1310                 .matches = {
1311                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1312                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1313                 },
1314         },
1315 #endif
1316         { }
1317 };
1318
1319 void __init synaptics_module_init(void)
1320 {
1321         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1322         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1323         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1324 }
1325
1326 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1327 {
1328         struct synaptics_data *priv;
1329         int err = -1;
1330
1331         /*
1332          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1333          * packet spew overloads the EC such that key presses on the keyboard
1334          * are missed.  Given that, don't even attempt to use Absolute mode.
1335          * Relative mode seems to work just fine.
1336          */
1337         if (absolute_mode && broken_olpc_ec) {
1338                 psmouse_info(psmouse,
1339                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1340                 return -ENODEV;
1341         }
1342
1343         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1344         if (!priv)
1345                 return -ENOMEM;
1346
1347         psmouse_reset(psmouse);
1348
1349         if (synaptics_query_hardware(psmouse)) {
1350                 psmouse_err(psmouse, "Unable to query device.\n");
1351                 goto init_fail;
1352         }
1353
1354         priv->absolute_mode = absolute_mode;
1355         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1356                 priv->disable_gesture = true;
1357
1358         /*
1359          * Unfortunately ForcePad capability is not exported over PS/2,
1360          * so we have to resort to checking PNP IDs.
1361          */
1362         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1363
1364         if (synaptics_set_mode(psmouse)) {
1365                 psmouse_err(psmouse, "Unable to initialize device.\n");
1366                 goto init_fail;
1367         }
1368
1369         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1370
1371         psmouse_info(psmouse,
1372                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1373                      SYN_ID_MODEL(priv->identity),
1374                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1375                      priv->model_id,
1376                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1377                      priv->board_id, priv->firmware_id);
1378
1379         set_input_params(psmouse, priv);
1380
1381         /*
1382          * Encode touchpad model so that it can be used to set
1383          * input device->id.version and be visible to userspace.
1384          * Because version is __u16 we have to drop something.
1385          * Hardware info bits seem to be good candidates as they
1386          * are documented to be for Synaptics corp. internal use.
1387          */
1388         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1389                           (priv->model_id & 0x000000ff);
1390
1391         if (absolute_mode) {
1392                 psmouse->protocol_handler = synaptics_process_byte;
1393                 psmouse->pktsize = 6;
1394         } else {
1395                 /* Relative mode follows standard PS/2 mouse protocol */
1396                 psmouse->protocol_handler = psmouse_process_byte;
1397                 psmouse->pktsize = 3;
1398         }
1399
1400         psmouse->set_rate = synaptics_set_rate;
1401         psmouse->disconnect = synaptics_disconnect;
1402         psmouse->reconnect = synaptics_reconnect;
1403         psmouse->cleanup = synaptics_reset;
1404         /* Synaptics can usually stay in sync without extra help */
1405         psmouse->resync_time = 0;
1406
1407         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1408                 synaptics_pt_create(psmouse);
1409
1410         /*
1411          * Toshiba's KBC seems to have trouble handling data from
1412          * Synaptics at full rate.  Switch to a lower rate (roughly
1413          * the same rate as a standard PS/2 mouse).
1414          */
1415         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1416                 psmouse_info(psmouse,
1417                              "Toshiba %s detected, limiting rate to 40pps.\n",
1418                              dmi_get_system_info(DMI_PRODUCT_NAME));
1419                 psmouse->rate = 40;
1420         }
1421
1422         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1423                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1424                                          &psmouse_attr_disable_gesture.dattr);
1425                 if (err) {
1426                         psmouse_err(psmouse,
1427                                     "Failed to create disable_gesture attribute (%d)",
1428                                     err);
1429                         goto init_fail;
1430                 }
1431         }
1432
1433         return 0;
1434
1435  init_fail:
1436         kfree(priv);
1437         return err;
1438 }
1439
1440 int synaptics_init(struct psmouse *psmouse)
1441 {
1442         return __synaptics_init(psmouse, true);
1443 }
1444
1445 int synaptics_init_relative(struct psmouse *psmouse)
1446 {
1447         return __synaptics_init(psmouse, false);
1448 }
1449
1450 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1451
1452 void __init synaptics_module_init(void)
1453 {
1454 }
1455
1456 int synaptics_init(struct psmouse *psmouse)
1457 {
1458         return -ENOSYS;
1459 }
1460
1461 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */