drivers/input/mouse/synaptics.c

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