kernel/drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /* maximum ABS_MT_POSITION displacement (in mm) */
  71 #define DMAX 10
  72
  73 /*****************************************************************************
  74  *      Stuff we need even when we do not want native Synaptics support
  75  ****************************************************************************/
  76
  77 /*
  78  * Set the synaptics touchpad mode byte by special commands
  79  */
  80 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  81 {
  82         unsigned char param[1];
  83
  84         if (psmouse_sliced_command(psmouse, mode))
  85                 return -1;
  86         param[0] = SYN_PS_SET_MODE2;
  87         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  88                 return -1;
  89         return 0;
  90 }
  91
  92 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  93 {
  94         struct ps2dev *ps2dev = &psmouse->ps2dev;
  95         unsigned char param[4];
  96
  97         param[0] = 0;
  98
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 101         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 104
 105         if (param[1] != 0x47)
 106                 return -ENODEV;
 107
 108         if (set_properties) {
 109                 psmouse->vendor = "Synaptics";
 110                 psmouse->name = "TouchPad";
 111         }
 112
 113         return 0;
 114 }
 115
 116 void synaptics_reset(struct psmouse *psmouse)
 117 {
 118         /* reset touchpad back to relative mode, gestures enabled */
 119         synaptics_mode_cmd(psmouse, 0);
 120 }
 121
 122 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 123
 124 static bool cr48_profile_sensor;
 125
 126 #define ANY_BOARD_ID 0
 127 struct min_max_quirk {
 128         const char * const *pnp_ids;
 129         struct {
 130                 unsigned long int min, max;
 131         } board_id;
 132         int x_min, x_max, y_min, y_max;
 133 };
 134
 135 static const struct min_max_quirk min_max_pnpid_table[] = {
 136         {
 137                 (const char * const []){"LEN0033", NULL},
 138                 {ANY_BOARD_ID, ANY_BOARD_ID},
 139                 1024, 5052, 2258, 4832
 140         },
 141         {
 142                 (const char * const []){"LEN0042", NULL},
 143                 {ANY_BOARD_ID, ANY_BOARD_ID},
 144                 1232, 5710, 1156, 4696
 145         },
 146         {
 147                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 148                                         "LEN0039", "LEN2002", "LEN2004",
 149                                         NULL},
 150                 {ANY_BOARD_ID, 2961},
 151                 1024, 5112, 2024, 4832
 152         },
 153         {
 154                 (const char * const []){"LEN2000", NULL},
 155                 {ANY_BOARD_ID, ANY_BOARD_ID},
 156                 1024, 5113, 2021, 4832
 157         },
 158         {
 159                 (const char * const []){"LEN2001", NULL},
 160                 {ANY_BOARD_ID, ANY_BOARD_ID},
 161                 1024, 5022, 2508, 4832
 162         },
 163         {
 164                 (const char * const []){"LEN2006", NULL},
 165                 {2691, 2691},
 166                 1024, 5045, 2457, 4832
 167         },
 168         {
 169                 (const char * const []){"LEN2006", NULL},
 170                 {ANY_BOARD_ID, ANY_BOARD_ID},
 171                 1264, 5675, 1171, 4688
 172         },
 173         { }
 174 };
 175
 176 /* This list has been kindly provided by Synaptics. */
 177 static const char * const topbuttonpad_pnp_ids[] = {
 178         "LEN0017",
 179         "LEN0018",
 180         "LEN0019",
 181         "LEN0023",
 182         "LEN002A",
 183         "LEN002B",
 184         "LEN002C",
 185         "LEN002D",
 186         "LEN002E",
 187         "LEN0033", /* Helix */
 188         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 189         "LEN0035", /* X240 */
 190         "LEN0036", /* T440 */
 191         "LEN0037", /* X1 Carbon 2nd */
 192         "LEN0038",
 193         "LEN0039", /* T440s */
 194         "LEN0041",
 195         "LEN0042", /* Yoga */
 196         "LEN0045",
 197         "LEN0047",
 198         "LEN0049",
 199         "LEN2000", /* S540 */
 200         "LEN2001", /* Edge E431 */
 201         "LEN2002", /* Edge E531 */
 202         "LEN2003",
 203         "LEN2004", /* L440 */
 204         "LEN2005",
 205         "LEN2006", /* Edge E440/E540 */
 206         "LEN2007",
 207         "LEN2008",
 208         "LEN2009",
 209         "LEN200A",
 210         "LEN200B",
 211         NULL
 212 };
 213
 214 /* This list has been kindly provided by Synaptics. */
 215 static const char * const forcepad_pnp_ids[] = {
 216         "SYN300D",
 217         "SYN3014",
 218         NULL
 219 };
 220
 221 /*****************************************************************************
 222  *      Synaptics communications functions
 223  ****************************************************************************/
 224
 225 /*
 226  * Synaptics touchpads report the y coordinate from bottom to top, which is
 227  * opposite from what userspace expects.
 228  * This function is used to invert y before reporting.
 229  */
 230 static int synaptics_invert_y(int y)
 231 {
 232         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 233 }
 234
 235 /*
 236  * Send a command to the synpatics touchpad by special commands
 237  */
 238 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 239 {
 240         if (psmouse_sliced_command(psmouse, c))
 241                 return -1;
 242         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 243                 return -1;
 244         return 0;
 245 }
 246
 247 /*
 248  * Read the model-id bytes from the touchpad
 249  * see also SYN_MODEL_* macros
 250  */
 251 static int synaptics_model_id(struct psmouse *psmouse)
 252 {
 253         struct synaptics_data *priv = psmouse->private;
 254         unsigned char mi[3];
 255
 256         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 257                 return -1;
 258         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 259         return 0;
 260 }
 261
 262 static int synaptics_more_extended_queries(struct psmouse *psmouse)
 263 {
 264         struct synaptics_data *priv = psmouse->private;
 265         unsigned char buf[3];
 266
 267         if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
 268                 return -1;
 269
 270         priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];
 271
 272         return 0;
 273 }
 274
 275 /*
 276  * Read the board id and the "More Extended Queries" from the touchpad
 277  * The board id is encoded in the "QUERY MODES" response
 278  */
 279 static int synaptics_query_modes(struct psmouse *psmouse)
 280 {
 281         struct synaptics_data *priv = psmouse->private;
 282         unsigned char bid[3];
 283
 284         /* firmwares prior 7.5 have no board_id encoded */
 285         if (SYN_ID_FULL(priv->identity) < 0x705)
 286                 return 0;
 287
 288         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 289                 return -1;
 290         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 291
 292         if (SYN_MEXT_CAP_BIT(bid[0]))
 293                 return synaptics_more_extended_queries(psmouse);
 294
 295         return 0;
 296 }
 297
 298 /*
 299  * Read the firmware id from the touchpad
 300  */
 301 static int synaptics_firmware_id(struct psmouse *psmouse)
 302 {
 303         struct synaptics_data *priv = psmouse->private;
 304         unsigned char fwid[3];
 305
 306         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 307                 return -1;
 308         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 309         return 0;
 310 }
 311
 312 /*
 313  * Read the capability-bits from the touchpad
 314  * see also the SYN_CAP_* macros
 315  */
 316 static int synaptics_capability(struct psmouse *psmouse)
 317 {
 318         struct synaptics_data *priv = psmouse->private;
 319         unsigned char cap[3];
 320
 321         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 322                 return -1;
 323         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 324         priv->ext_cap = priv->ext_cap_0c = 0;
 325
 326         /*
 327          * Older firmwares had submodel ID fixed to 0x47
 328          */
 329         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 330             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 331                 return -1;
 332         }
 333
 334         /*
 335          * Unless capExtended is set the rest of the flags should be ignored
 336          */
 337         if (!SYN_CAP_EXTENDED(priv->capabilities))
 338                 priv->capabilities = 0;
 339
 340         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 341                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 342                         psmouse_warn(psmouse,
 343                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 344                 } else {
 345                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 346
 347                         /*
 348                          * if nExtBtn is greater than 8 it should be considered
 349                          * invalid and treated as 0
 350                          */
 351                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 352                                 priv->ext_cap &= 0xff0fff;
 353                 }
 354         }
 355
 356         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 357                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 358                         psmouse_warn(psmouse,
 359                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 360                 } else {
 361                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 362                 }
 363         }
 364
 365         return 0;
 366 }
 367
 368 /*
 369  * Identify Touchpad
 370  * See also the SYN_ID_* macros
 371  */
 372 static int synaptics_identify(struct psmouse *psmouse)
 373 {
 374         struct synaptics_data *priv = psmouse->private;
 375         unsigned char id[3];
 376
 377         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 378                 return -1;
 379         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 380         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 381                 return 0;
 382         return -1;
 383 }
 384
 385 /*
 386  * Read touchpad resolution and maximum reported coordinates
 387  * Resolution is left zero if touchpad does not support the query
 388  */
 389
 390 static int synaptics_resolution(struct psmouse *psmouse)
 391 {
 392         struct synaptics_data *priv = psmouse->private;
 393         unsigned char resp[3];
 394
 395         if (SYN_ID_MAJOR(priv->identity) < 4)
 396                 return 0;
 397
 398         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 399                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 400                         priv->x_res = resp[0]; /* x resolution in units/mm */
 401                         priv->y_res = resp[2]; /* y resolution in units/mm */
 402                 }
 403         }
 404
 405         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 406             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 407                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 408                         psmouse_warn(psmouse,
 409                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 410                 } else {
 411                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 412                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 413                         psmouse_info(psmouse,
 414                                      "queried max coordinates: x [..%d], y [..%d]\n",
 415                                      priv->x_max, priv->y_max);
 416                 }
 417         }
 418
 419         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 420             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 421              /*
 422               * Firmware v8.1 does not report proper number of extended
 423               * capabilities, but has been proven to report correct min
 424               * coordinates.
 425               */
 426              SYN_ID_FULL(priv->identity) == 0x801)) {
 427                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 428                         psmouse_warn(psmouse,
 429                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 430                 } else {
 431                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 432                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 433                         psmouse_info(psmouse,
 434                                      "queried min coordinates: x [%d..], y [%d..]\n",
 435                                      priv->x_min, priv->y_min);
 436                 }
 437         }
 438
 439         return 0;
 440 }
 441
 442 /*
 443  * Apply quirk(s) if the hardware matches
 444  */
 445
 446 static void synaptics_apply_quirks(struct psmouse *psmouse)
 447 {
 448         struct synaptics_data *priv = psmouse->private;
 449         int i;
 450
 451         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 452                 if (!psmouse_matches_pnp_id(psmouse,
 453                                             min_max_pnpid_table[i].pnp_ids))
 454                         continue;
 455
 456                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 457                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 458                         continue;
 459
 460                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 461                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 462                         continue;
 463
 464                 priv->x_min = min_max_pnpid_table[i].x_min;
 465                 priv->x_max = min_max_pnpid_table[i].x_max;
 466                 priv->y_min = min_max_pnpid_table[i].y_min;
 467                 priv->y_max = min_max_pnpid_table[i].y_max;
 468                 psmouse_info(psmouse,
 469                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 470                              priv->x_min, priv->x_max,
 471                              priv->y_min, priv->y_max);
 472                 break;
 473         }
 474 }
 475
 476 static int synaptics_query_hardware(struct psmouse *psmouse)
 477 {
 478         if (synaptics_identify(psmouse))
 479                 return -1;
 480         if (synaptics_model_id(psmouse))
 481                 return -1;
 482         if (synaptics_firmware_id(psmouse))
 483                 return -1;
 484         if (synaptics_query_modes(psmouse))
 485                 return -1;
 486         if (synaptics_capability(psmouse))
 487                 return -1;
 488         if (synaptics_resolution(psmouse))
 489                 return -1;
 490
 491         synaptics_apply_quirks(psmouse);
 492
 493         return 0;
 494 }
 495
 496 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 497 {
 498         static unsigned char param = 0xc8;
 499         struct synaptics_data *priv = psmouse->private;
 500
 501         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 502               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 503                 return 0;
 504
 505         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 506                 return -1;
 507
 508         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 509                 return -1;
 510
 511         /* Advanced gesture mode also sends multi finger data */
 512         priv->capabilities |= BIT(1);
 513
 514         return 0;
 515 }
 516
 517 static int synaptics_set_mode(struct psmouse *psmouse)
 518 {
 519         struct synaptics_data *priv = psmouse->private;
 520
 521         priv->mode = 0;
 522         if (priv->absolute_mode)
 523                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 524         if (priv->disable_gesture)
 525                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 526         if (psmouse->rate >= 80)
 527                 priv->mode |= SYN_BIT_HIGH_RATE;
 528         if (SYN_CAP_EXTENDED(priv->capabilities))
 529                 priv->mode |= SYN_BIT_W_MODE;
 530
 531         if (synaptics_mode_cmd(psmouse, priv->mode))
 532                 return -1;
 533
 534         if (priv->absolute_mode &&
 535             synaptics_set_advanced_gesture_mode(psmouse)) {
 536                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 537                 return -1;
 538         }
 539
 540         return 0;
 541 }
 542
 543 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 544 {
 545         struct synaptics_data *priv = psmouse->private;
 546
 547         if (rate >= 80) {
 548                 priv->mode |= SYN_BIT_HIGH_RATE;
 549                 psmouse->rate = 80;
 550         } else {
 551                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 552                 psmouse->rate = 40;
 553         }
 554
 555         synaptics_mode_cmd(psmouse, priv->mode);
 556 }
 557
 558 /*****************************************************************************
 559  *      Synaptics pass-through PS/2 port support
 560  ****************************************************************************/
 561 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 562 {
 563         struct psmouse *parent = serio_get_drvdata(serio->parent);
 564         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 565
 566         if (psmouse_sliced_command(parent, c))
 567                 return -1;
 568         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 569                 return -1;
 570         return 0;
 571 }
 572
 573 static int synaptics_pt_start(struct serio *serio)
 574 {
 575         struct psmouse *parent = serio_get_drvdata(serio->parent);
 576         struct synaptics_data *priv = parent->private;
 577
 578         serio_pause_rx(parent->ps2dev.serio);
 579         priv->pt_port = serio;
 580         serio_continue_rx(parent->ps2dev.serio);
 581
 582         return 0;
 583 }
 584
 585 static void synaptics_pt_stop(struct serio *serio)
 586 {
 587         struct psmouse *parent = serio_get_drvdata(serio->parent);
 588         struct synaptics_data *priv = parent->private;
 589
 590         serio_pause_rx(parent->ps2dev.serio);
 591         priv->pt_port = NULL;
 592         serio_continue_rx(parent->ps2dev.serio);
 593 }
 594
 595 static int synaptics_is_pt_packet(unsigned char *buf)
 596 {
 597         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 598 }
 599
 600 static void synaptics_pass_pt_packet(struct psmouse *psmouse,
 601                                      struct serio *ptport,
 602                                      unsigned char *packet)
 603 {
 604         struct synaptics_data *priv = psmouse->private;
 605         struct psmouse *child = serio_get_drvdata(ptport);
 606
 607         if (child && child->state == PSMOUSE_ACTIVATED) {
 608                 serio_interrupt(ptport, packet[1] | priv->pt_buttons, 0);
 609                 serio_interrupt(ptport, packet[4], 0);
 610                 serio_interrupt(ptport, packet[5], 0);
 611                 if (child->pktsize == 4)
 612                         serio_interrupt(ptport, packet[2], 0);
 613         } else {
 614                 serio_interrupt(ptport, packet[1], 0);
 615         }
 616 }
 617
 618 static void synaptics_pt_activate(struct psmouse *psmouse)
 619 {
 620         struct synaptics_data *priv = psmouse->private;
 621         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 622
 623         /* adjust the touchpad to child's choice of protocol */
 624         if (child) {
 625                 if (child->pktsize == 4)
 626                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 627                 else
 628                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 629
 630                 if (synaptics_mode_cmd(psmouse, priv->mode))
 631                         psmouse_warn(psmouse,
 632                                      "failed to switch guest protocol\n");
 633         }
 634 }
 635
 636 static void synaptics_pt_create(struct psmouse *psmouse)
 637 {
 638         struct serio *serio;
 639
 640         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 641         if (!serio) {
 642                 psmouse_err(psmouse,
 643                             "not enough memory for pass-through port\n");
 644                 return;
 645         }
 646
 647         serio->id.type = SERIO_PS_PSTHRU;
 648         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 649         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 650         serio->write = synaptics_pt_write;
 651         serio->start = synaptics_pt_start;
 652         serio->stop = synaptics_pt_stop;
 653         serio->parent = psmouse->ps2dev.serio;
 654
 655         psmouse->pt_activate = synaptics_pt_activate;
 656
 657         psmouse_info(psmouse, "serio: %s port at %s\n",
 658                      serio->name, psmouse->phys);
 659         serio_register_port(serio);
 660 }
 661
 662 /*****************************************************************************
 663  *      Functions to interpret the absolute mode packets
 664  ****************************************************************************/
 665
 666 static void synaptics_parse_agm(const unsigned char buf[],
 667                                 struct synaptics_data *priv,
 668                                 struct synaptics_hw_state *hw)
 669 {
 670         struct synaptics_hw_state *agm = &priv->agm;
 671         int agm_packet_type;
 672
 673         agm_packet_type = (buf[5] & 0x30) >> 4;
 674         switch (agm_packet_type) {
 675         case 1:
 676                 /* Gesture packet: (x, y, z) half resolution */
 677                 agm->w = hw->w;
 678                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 679                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 680                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 681                 break;
 682
 683         case 2:
 684                 /* AGM-CONTACT packet: we are only interested in the count */
 685                 priv->agm_count = buf[1];
 686                 break;
 687
 688         default:
 689                 break;
 690         }
 691 }
 692
 693 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 694                                         struct synaptics_data *priv,
 695                                         struct synaptics_hw_state *hw)
 696 {
 697         unsigned int ext_bits =
 698                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 699         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 700
 701         hw->ext_buttons = buf[4] & ext_mask;
 702         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 703 }
 704
 705 static int synaptics_parse_hw_state(const unsigned char buf[],
 706                                     struct synaptics_data *priv,
 707                                     struct synaptics_hw_state *hw)
 708 {
 709         memset(hw, 0, sizeof(struct synaptics_hw_state));
 710
 711         if (SYN_MODEL_NEWABS(priv->model_id)) {
 712                 hw->w = (((buf[0] & 0x30) >> 2) |
 713                          ((buf[0] & 0x04) >> 1) |
 714                          ((buf[3] & 0x04) >> 2));
 715
 716                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 717                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 718                     hw->w == 2) {
 719                         synaptics_parse_agm(buf, priv, hw);
 720                         return 1;
 721                 }
 722
 723                 hw->x = (((buf[3] & 0x10) << 8) |
 724                          ((buf[1] & 0x0f) << 8) |
 725                          buf[4]);
 726                 hw->y = (((buf[3] & 0x20) << 7) |
 727                          ((buf[1] & 0xf0) << 4) |
 728                          buf[5]);
 729                 hw->z = buf[2];
 730
 731                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 732                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 733
 734                 if (priv->is_forcepad) {
 735                         /*
 736                          * ForcePads, like Clickpads, use middle button
 737                          * bits to report primary button clicks.
 738                          * Unfortunately they report primary button not
 739                          * only when user presses on the pad above certain
 740                          * threshold, but also when there are more than one
 741                          * finger on the touchpad, which interferes with
 742                          * out multi-finger gestures.
 743                          */
 744                         if (hw->z == 0) {
 745                                 /* No contacts */
 746                                 priv->press = priv->report_press = false;
 747                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 748                                 /*
 749                                  * Single-finger touch with pressure above
 750                                  * the threshold. If pressure stays long
 751                                  * enough, we'll start reporting primary
 752                                  * button. We rely on the device continuing
 753                                  * sending data even if finger does not
 754                                  * move.
 755                                  */
 756                                 if  (!priv->press) {
 757                                         priv->press_start = jiffies;
 758                                         priv->press = true;
 759                                 } else if (time_after(jiffies,
 760                                                 priv->press_start +
 761                                                         msecs_to_jiffies(50))) {
 762                                         priv->report_press = true;
 763                                 }
 764                         } else {
 765                                 priv->press = false;
 766                         }
 767
 768                         hw->left = priv->report_press;
 769
 770                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 771                         /*
 772                          * Clickpad's button is transmitted as middle button,
 773                          * however, since it is primary button, we will report
 774                          * it as BTN_LEFT.
 775                          */
 776                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 777
 778                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 779                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 780                         if (hw->w == 2)
 781                                 hw->scroll = (signed char)(buf[1]);
 782                 }
 783
 784                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 785                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 786                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 787                 }
 788
 789                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 790                     ((buf[0] ^ buf[3]) & 0x02)) {
 791                         synaptics_parse_ext_buttons(buf, priv, hw);
 792                 }
 793         } else {
 794                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 795                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 796
 797                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 798                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 799
 800                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 801                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 802         }
 803
 804         /*
 805          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 806          * is used by some firmware to indicate a finger at the edge of
 807          * the touchpad whose precise position cannot be determined, so
 808          * convert these values to the maximum axis value.
 809          */
 810         if (hw->x > X_MAX_POSITIVE)
 811                 hw->x -= 1 << ABS_POS_BITS;
 812         else if (hw->x == X_MAX_POSITIVE)
 813                 hw->x = XMAX;
 814
 815         if (hw->y > Y_MAX_POSITIVE)
 816                 hw->y -= 1 << ABS_POS_BITS;
 817         else if (hw->y == Y_MAX_POSITIVE)
 818                 hw->y = YMAX;
 819
 820         return 0;
 821 }
 822
 823 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 824                                           bool active, int x, int y)
 825 {
 826         input_mt_slot(dev, slot);
 827         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 828         if (active) {
 829                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 830                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 831         }
 832 }
 833
 834 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 835                                           const struct synaptics_hw_state *a,
 836                                           const struct synaptics_hw_state *b,
 837                                           int num_fingers)
 838 {
 839         if (num_fingers >= 2) {
 840                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 841                                               min(a->y, b->y));
 842                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 843                                               max(a->y, b->y));
 844         } else if (num_fingers == 1) {
 845                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 846                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 847         } else {
 848                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 849                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 850         }
 851 }
 852
 853 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 854                                          const struct synaptics_hw_state *hw)
 855 {
 856         struct input_dev *dev = psmouse->dev;
 857         struct synaptics_data *priv = psmouse->private;
 858         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 859         char buf[6] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 860         int i;
 861
 862         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 863                 return;
 864
 865         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 866         if ((SYN_ID_FULL(priv->identity) == 0x801 ||
 867              SYN_ID_FULL(priv->identity) == 0x802) &&
 868             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 869                 return;
 870
 871         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10)) {
 872                 for (i = 0; i < ext_bits; i++) {
 873                         input_report_key(dev, BTN_0 + 2 * i,
 874                                 hw->ext_buttons & (1 << i));
 875                         input_report_key(dev, BTN_1 + 2 * i,
 876                                 hw->ext_buttons & (1 << (i + ext_bits)));
 877                 }
 878                 return;
 879         }
 880
 881         /*
 882          * This generation of touchpads has the trackstick buttons
 883          * physically wired to the touchpad. Re-route them through
 884          * the pass-through interface.
 885          */
 886         if (!priv->pt_port)
 887                 return;
 888
 889         /* The trackstick expects at most 3 buttons */
 890         priv->pt_buttons = SYN_CAP_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 891                            SYN_CAP_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 892                            SYN_CAP_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 893
 894         synaptics_pass_pt_packet(psmouse, priv->pt_port, buf);
 895 }
 896
 897 static void synaptics_report_buttons(struct psmouse *psmouse,
 898                                      const struct synaptics_hw_state *hw)
 899 {
 900         struct input_dev *dev = psmouse->dev;
 901         struct synaptics_data *priv = psmouse->private;
 902
 903         input_report_key(dev, BTN_LEFT, hw->left);
 904         input_report_key(dev, BTN_RIGHT, hw->right);
 905
 906         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 907                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 908
 909         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 910                 input_report_key(dev, BTN_FORWARD, hw->up);
 911                 input_report_key(dev, BTN_BACK, hw->down);
 912         }
 913
 914         synaptics_report_ext_buttons(psmouse, hw);
 915 }
 916
 917 static void synaptics_report_mt_data(struct psmouse *psmouse,
 918                                      const struct synaptics_hw_state *sgm,
 919                                      int num_fingers)
 920 {
 921         struct input_dev *dev = psmouse->dev;
 922         struct synaptics_data *priv = psmouse->private;
 923         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 924         struct input_mt_pos pos[2];
 925         int slot[2], nsemi, i;
 926
 927         nsemi = clamp_val(num_fingers, 0, 2);
 928
 929         for (i = 0; i < nsemi; i++) {
 930                 pos[i].x = hw[i]->x;
 931                 pos[i].y = synaptics_invert_y(hw[i]->y);
 932         }
 933
 934         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->x_res);
 935
 936         for (i = 0; i < nsemi; i++) {
 937                 input_mt_slot(dev, slot[i]);
 938                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 939                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 940                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 941                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 942         }
 943
 944         input_mt_drop_unused(dev);
 945
 946         /* Don't use active slot count to generate BTN_TOOL events. */
 947         input_mt_report_pointer_emulation(dev, false);
 948
 949         /* Send the number of fingers reported by touchpad itself. */
 950         input_mt_report_finger_count(dev, num_fingers);
 951
 952         synaptics_report_buttons(psmouse, sgm);
 953
 954         input_sync(dev);
 955 }
 956
 957 static void synaptics_image_sensor_process(struct psmouse *psmouse,
 958                                            struct synaptics_hw_state *sgm)
 959 {
 960         struct synaptics_data *priv = psmouse->private;
 961         int num_fingers;
 962
 963         /*
 964          * Update mt_state using the new finger count and current mt_state.
 965          */
 966         if (sgm->z == 0)
 967                 num_fingers = 0;
 968         else if (sgm->w >= 4)
 969                 num_fingers = 1;
 970         else if (sgm->w == 0)
 971                 num_fingers = 2;
 972         else if (sgm->w == 1)
 973                 num_fingers = priv->agm_count ? priv->agm_count : 3;
 974         else
 975                 num_fingers = 4;
 976
 977         /* Send resulting input events to user space */
 978         synaptics_report_mt_data(psmouse, sgm, num_fingers);
 979 }
 980
 981 /*
 982  *  called for each full received packet from the touchpad
 983  */
 984 static void synaptics_process_packet(struct psmouse *psmouse)
 985 {
 986         struct input_dev *dev = psmouse->dev;
 987         struct synaptics_data *priv = psmouse->private;
 988         struct synaptics_hw_state hw;
 989         int num_fingers;
 990         int finger_width;
 991
 992         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 993                 return;
 994
 995         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 996                 synaptics_image_sensor_process(psmouse, &hw);
 997                 return;
 998         }
 999
1000         if (hw.scroll) {
1001                 priv->scroll += hw.scroll;
1002
1003                 while (priv->scroll >= 4) {
1004                         input_report_key(dev, BTN_BACK, !hw.down);
1005                         input_sync(dev);
1006                         input_report_key(dev, BTN_BACK, hw.down);
1007                         input_sync(dev);
1008                         priv->scroll -= 4;
1009                 }
1010                 while (priv->scroll <= -4) {
1011                         input_report_key(dev, BTN_FORWARD, !hw.up);
1012                         input_sync(dev);
1013                         input_report_key(dev, BTN_FORWARD, hw.up);
1014                         input_sync(dev);
1015                         priv->scroll += 4;
1016                 }
1017                 return;
1018         }
1019
1020         if (hw.z > 0 && hw.x > 1) {
1021                 num_fingers = 1;
1022                 finger_width = 5;
1023                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1024                         switch (hw.w) {
1025                         case 0 ... 1:
1026                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1027                                         num_fingers = hw.w + 2;
1028                                 break;
1029                         case 2:
1030                                 if (SYN_MODEL_PEN(priv->model_id))
1031                                         ;   /* Nothing, treat a pen as a single finger */
1032                                 break;
1033                         case 4 ... 15:
1034                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1035                                         finger_width = hw.w;
1036                                 break;
1037                         }
1038                 }
1039         } else {
1040                 num_fingers = 0;
1041                 finger_width = 0;
1042         }
1043
1044         if (cr48_profile_sensor) {
1045                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1046                 return;
1047         }
1048
1049         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1050                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1051                                               num_fingers);
1052
1053         /* Post events
1054          * BTN_TOUCH has to be first as mousedev relies on it when doing
1055          * absolute -> relative conversion
1056          */
1057         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1058         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1059
1060         if (num_fingers > 0) {
1061                 input_report_abs(dev, ABS_X, hw.x);
1062                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1063         }
1064         input_report_abs(dev, ABS_PRESSURE, hw.z);
1065
1066         if (SYN_CAP_PALMDETECT(priv->capabilities))
1067                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1068
1069         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1070         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1071                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1072                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1073         }
1074
1075         synaptics_report_buttons(psmouse, &hw);
1076
1077         input_sync(dev);
1078 }
1079
1080 static int synaptics_validate_byte(struct psmouse *psmouse,
1081                                    int idx, unsigned char pkt_type)
1082 {
1083         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1084         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1085         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1086         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1087         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1088         const char *packet = psmouse->packet;
1089
1090         if (idx < 0 || idx > 4)
1091                 return 0;
1092
1093         switch (pkt_type) {
1094
1095         case SYN_NEWABS:
1096         case SYN_NEWABS_RELAXED:
1097                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1098
1099         case SYN_NEWABS_STRICT:
1100                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1101
1102         case SYN_OLDABS:
1103                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1104
1105         default:
1106                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1107                 return 0;
1108         }
1109 }
1110
1111 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1112 {
1113         int i;
1114
1115         for (i = 0; i < 5; i++)
1116                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1117                         psmouse_info(psmouse, "using relaxed packet validation\n");
1118                         return SYN_NEWABS_RELAXED;
1119                 }
1120
1121         return SYN_NEWABS_STRICT;
1122 }
1123
1124 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1125 {
1126         struct synaptics_data *priv = psmouse->private;
1127
1128         if (psmouse->pktcnt >= 6) { /* Full packet received */
1129                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1130                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1131
1132                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1133                     synaptics_is_pt_packet(psmouse->packet)) {
1134                         if (priv->pt_port)
1135                                 synaptics_pass_pt_packet(psmouse, priv->pt_port,
1136                                                          psmouse->packet);
1137                 } else
1138                         synaptics_process_packet(psmouse);
1139
1140                 return PSMOUSE_FULL_PACKET;
1141         }
1142
1143         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1144                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1145 }
1146
1147 /*****************************************************************************
1148  *      Driver initialization/cleanup functions
1149  ****************************************************************************/
1150 static void set_abs_position_params(struct input_dev *dev,
1151                                     struct synaptics_data *priv, int x_code,
1152                                     int y_code)
1153 {
1154         int x_min = priv->x_min ?: XMIN_NOMINAL;
1155         int x_max = priv->x_max ?: XMAX_NOMINAL;
1156         int y_min = priv->y_min ?: YMIN_NOMINAL;
1157         int y_max = priv->y_max ?: YMAX_NOMINAL;
1158         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1159                         SYN_REDUCED_FILTER_FUZZ : 0;
1160
1161         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1162         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1163         input_abs_set_res(dev, x_code, priv->x_res);
1164         input_abs_set_res(dev, y_code, priv->y_res);
1165 }
1166
1167 static void set_input_params(struct psmouse *psmouse,
1168                              struct synaptics_data *priv)
1169 {
1170         struct input_dev *dev = psmouse->dev;
1171         int i;
1172
1173         /* Things that apply to both modes */
1174         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1175         __set_bit(EV_KEY, dev->evbit);
1176         __set_bit(BTN_LEFT, dev->keybit);
1177         __set_bit(BTN_RIGHT, dev->keybit);
1178
1179         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1180                 __set_bit(BTN_MIDDLE, dev->keybit);
1181
1182         if (!priv->absolute_mode) {
1183                 /* Relative mode */
1184                 __set_bit(EV_REL, dev->evbit);
1185                 __set_bit(REL_X, dev->relbit);
1186                 __set_bit(REL_Y, dev->relbit);
1187                 return;
1188         }
1189
1190         /* Absolute mode */
1191         __set_bit(EV_ABS, dev->evbit);
1192         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1193         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1194
1195         if (cr48_profile_sensor)
1196                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1197
1198         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1199                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1200                                         ABS_MT_POSITION_Y);
1201                 /* Image sensors can report per-contact pressure */
1202                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1203                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1204
1205                 /* Image sensors can signal 4 and 5 finger clicks */
1206                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1207                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1208         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1209                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1210                                         ABS_MT_POSITION_Y);
1211                 /*
1212                  * Profile sensor in CR-48 tracks contacts reasonably well,
1213                  * other non-image sensors with AGM use semi-mt.
1214                  */
1215                 input_mt_init_slots(dev, 2,
1216                                     INPUT_MT_POINTER |
1217                                     (cr48_profile_sensor ?
1218                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1219         }
1220
1221         if (SYN_CAP_PALMDETECT(priv->capabilities))
1222                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1223
1224         __set_bit(BTN_TOUCH, dev->keybit);
1225         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1226
1227         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1228                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1229                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1230         }
1231
1232         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1233             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1234                 __set_bit(BTN_FORWARD, dev->keybit);
1235                 __set_bit(BTN_BACK, dev->keybit);
1236         }
1237
1238         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1239                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1240                         __set_bit(BTN_0 + i, dev->keybit);
1241
1242         __clear_bit(EV_REL, dev->evbit);
1243         __clear_bit(REL_X, dev->relbit);
1244         __clear_bit(REL_Y, dev->relbit);
1245
1246         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1247                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1248                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1249                     !SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1250                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1251                 /* Clickpads report only left button */
1252                 __clear_bit(BTN_RIGHT, dev->keybit);
1253                 __clear_bit(BTN_MIDDLE, dev->keybit);
1254         }
1255 }
1256
1257 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1258                                               void *data, char *buf)
1259 {
1260         struct synaptics_data *priv = psmouse->private;
1261
1262         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1263 }
1264
1265 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1266                                              void *data, const char *buf,
1267                                              size_t len)
1268 {
1269         struct synaptics_data *priv = psmouse->private;
1270         unsigned int value;
1271         int err;
1272
1273         err = kstrtouint(buf, 10, &value);
1274         if (err)
1275                 return err;
1276
1277         if (value > 1)
1278                 return -EINVAL;
1279
1280         if (value == priv->disable_gesture)
1281                 return len;
1282
1283         priv->disable_gesture = value;
1284         if (value)
1285                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1286         else
1287                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1288
1289         if (synaptics_mode_cmd(psmouse, priv->mode))
1290                 return -EIO;
1291
1292         return len;
1293 }
1294
1295 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1296                     synaptics_show_disable_gesture,
1297                     synaptics_set_disable_gesture);
1298
1299 static void synaptics_disconnect(struct psmouse *psmouse)
1300 {
1301         struct synaptics_data *priv = psmouse->private;
1302
1303         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1304                 device_remove_file(&psmouse->ps2dev.serio->dev,
1305                                    &psmouse_attr_disable_gesture.dattr);
1306
1307         synaptics_reset(psmouse);
1308         kfree(priv);
1309         psmouse->private = NULL;
1310 }
1311
1312 static int synaptics_reconnect(struct psmouse *psmouse)
1313 {
1314         struct synaptics_data *priv = psmouse->private;
1315         struct synaptics_data old_priv = *priv;
1316         unsigned char param[2];
1317         int retry = 0;
1318         int error;
1319
1320         do {
1321                 psmouse_reset(psmouse);
1322                 if (retry) {
1323                         /*
1324                          * On some boxes, right after resuming, the touchpad
1325                          * needs some time to finish initializing (I assume
1326                          * it needs time to calibrate) and start responding
1327                          * to Synaptics-specific queries, so let's wait a
1328                          * bit.
1329                          */
1330                         ssleep(1);
1331                 }
1332                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1333                 error = synaptics_detect(psmouse, 0);
1334         } while (error && ++retry < 3);
1335
1336         if (error)
1337                 return -1;
1338
1339         if (retry > 1)
1340                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1341
1342         if (synaptics_query_hardware(psmouse)) {
1343                 psmouse_err(psmouse, "Unable to query device.\n");
1344                 return -1;
1345         }
1346
1347         if (synaptics_set_mode(psmouse)) {
1348                 psmouse_err(psmouse, "Unable to initialize device.\n");
1349                 return -1;
1350         }
1351
1352         if (old_priv.identity != priv->identity ||
1353             old_priv.model_id != priv->model_id ||
1354             old_priv.capabilities != priv->capabilities ||
1355             old_priv.ext_cap != priv->ext_cap) {
1356                 psmouse_err(psmouse,
1357                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1358                             old_priv.identity, priv->identity,
1359                             old_priv.model_id, priv->model_id,
1360                             old_priv.capabilities, priv->capabilities,
1361                             old_priv.ext_cap, priv->ext_cap);
1362                 return -1;
1363         }
1364
1365         return 0;
1366 }
1367
1368 static bool impaired_toshiba_kbc;
1369
1370 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1371 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1372         {
1373                 /* Toshiba Satellite */
1374                 .matches = {
1375                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1376                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1377                 },
1378         },
1379         {
1380                 /* Toshiba Dynabook */
1381                 .matches = {
1382                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1383                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1384                 },
1385         },
1386         {
1387                 /* Toshiba Portege M300 */
1388                 .matches = {
1389                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1390                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1391                 },
1392
1393         },
1394         {
1395                 /* Toshiba Portege M300 */
1396                 .matches = {
1397                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1398                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1399                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1400                 },
1401
1402         },
1403 #endif
1404         { }
1405 };
1406
1407 static bool broken_olpc_ec;
1408
1409 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1410 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1411         {
1412                 /* OLPC XO-1 or XO-1.5 */
1413                 .matches = {
1414                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1415                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1416                 },
1417         },
1418 #endif
1419         { }
1420 };
1421
1422 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1423 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1424         {
1425                 /* Cr-48 Chromebook (Codename Mario) */
1426                 .matches = {
1427                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1428                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1429                 },
1430         },
1431 #endif
1432         { }
1433 };
1434
1435 void __init synaptics_module_init(void)
1436 {
1437         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1438         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1439         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1440 }
1441
1442 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1443 {
1444         struct synaptics_data *priv;
1445         int err = -1;
1446
1447         /*
1448          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1449          * packet spew overloads the EC such that key presses on the keyboard
1450          * are missed.  Given that, don't even attempt to use Absolute mode.
1451          * Relative mode seems to work just fine.
1452          */
1453         if (absolute_mode && broken_olpc_ec) {
1454                 psmouse_info(psmouse,
1455                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1456                 return -ENODEV;
1457         }
1458
1459         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1460         if (!priv)
1461                 return -ENOMEM;
1462
1463         psmouse_reset(psmouse);
1464
1465         if (synaptics_query_hardware(psmouse)) {
1466                 psmouse_err(psmouse, "Unable to query device.\n");
1467                 goto init_fail;
1468         }
1469
1470         priv->absolute_mode = absolute_mode;
1471         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1472                 priv->disable_gesture = true;
1473
1474         /*
1475          * Unfortunately ForcePad capability is not exported over PS/2,
1476          * so we have to resort to checking PNP IDs.
1477          */
1478         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1479
1480         if (synaptics_set_mode(psmouse)) {
1481                 psmouse_err(psmouse, "Unable to initialize device.\n");
1482                 goto init_fail;
1483         }
1484
1485         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1486
1487         psmouse_info(psmouse,
1488                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1489                      SYN_ID_MODEL(priv->identity),
1490                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1491                      priv->model_id,
1492                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1493                      priv->ext_cap_10, priv->board_id, priv->firmware_id);
1494
1495         set_input_params(psmouse, priv);
1496
1497         /*
1498          * Encode touchpad model so that it can be used to set
1499          * input device->id.version and be visible to userspace.
1500          * Because version is __u16 we have to drop something.
1501          * Hardware info bits seem to be good candidates as they
1502          * are documented to be for Synaptics corp. internal use.
1503          */
1504         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1505                           (priv->model_id & 0x000000ff);
1506
1507         if (absolute_mode) {
1508                 psmouse->protocol_handler = synaptics_process_byte;
1509                 psmouse->pktsize = 6;
1510         } else {
1511                 /* Relative mode follows standard PS/2 mouse protocol */
1512                 psmouse->protocol_handler = psmouse_process_byte;
1513                 psmouse->pktsize = 3;
1514         }
1515
1516         psmouse->set_rate = synaptics_set_rate;
1517         psmouse->disconnect = synaptics_disconnect;
1518         psmouse->reconnect = synaptics_reconnect;
1519         psmouse->cleanup = synaptics_reset;
1520         /* Synaptics can usually stay in sync without extra help */
1521         psmouse->resync_time = 0;
1522
1523         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1524                 synaptics_pt_create(psmouse);
1525
1526         /*
1527          * Toshiba's KBC seems to have trouble handling data from
1528          * Synaptics at full rate.  Switch to a lower rate (roughly
1529          * the same rate as a standard PS/2 mouse).
1530          */
1531         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1532                 psmouse_info(psmouse,
1533                              "Toshiba %s detected, limiting rate to 40pps.\n",
1534                              dmi_get_system_info(DMI_PRODUCT_NAME));
1535                 psmouse->rate = 40;
1536         }
1537
1538         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1539                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1540                                          &psmouse_attr_disable_gesture.dattr);
1541                 if (err) {
1542                         psmouse_err(psmouse,
1543                                     "Failed to create disable_gesture attribute (%d)",
1544                                     err);
1545                         goto init_fail;
1546                 }
1547         }
1548
1549         return 0;
1550
1551  init_fail:
1552         kfree(priv);
1553         return err;
1554 }
1555
1556 int synaptics_init(struct psmouse *psmouse)
1557 {
1558         return __synaptics_init(psmouse, true);
1559 }
1560
1561 int synaptics_init_relative(struct psmouse *psmouse)
1562 {
1563         return __synaptics_init(psmouse, false);
1564 }
1565
1566 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1567
1568 void __init synaptics_module_init(void)
1569 {
1570 }
1571
1572 int synaptics_init(struct psmouse *psmouse)
1573 {
1574         return -ENOSYS;
1575 }
1576
1577 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */