drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /*****************************************************************************
  71  *      Stuff we need even when we do not want native Synaptics support
  72  ****************************************************************************/
  73
  74 /*
  75  * Set the synaptics touchpad mode byte by special commands
  76  */
  77 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  78 {
  79         unsigned char param[1];
  80
  81         if (psmouse_sliced_command(psmouse, mode))
  82                 return -1;
  83         param[0] = SYN_PS_SET_MODE2;
  84         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  85                 return -1;
  86         return 0;
  87 }
  88
  89 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  90 {
  91         struct ps2dev *ps2dev = &psmouse->ps2dev;
  92         unsigned char param[4];
  93
  94         param[0] = 0;
  95
  96         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  97         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  98         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 101
 102         if (param[1] != 0x47)
 103                 return -ENODEV;
 104
 105         if (set_properties) {
 106                 psmouse->vendor = "Synaptics";
 107                 psmouse->name = "TouchPad";
 108         }
 109
 110         return 0;
 111 }
 112
 113 void synaptics_reset(struct psmouse *psmouse)
 114 {
 115         /* reset touchpad back to relative mode, gestures enabled */
 116         synaptics_mode_cmd(psmouse, 0);
 117 }
 118
 119 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 120
 121 static bool cr48_profile_sensor;
 122
 123 struct min_max_quirk {
 124         const char * const *pnp_ids;
 125         int x_min, x_max, y_min, y_max;
 126 };
 127
 128 static const struct min_max_quirk min_max_pnpid_table[] = {
 129         {
 130                 (const char * const []){"LEN0033", NULL},
 131                 1024, 5052, 2258, 4832
 132         },
 133         {
 134                 (const char * const []){"LEN0035", "LEN0042", NULL},
 135                 1232, 5710, 1156, 4696
 136         },
 137         {
 138                 (const char * const []){"LEN0034", "LEN0036", "LEN2002",
 139                                         "LEN2004", NULL},
 140                 1024, 5112, 2024, 4832
 141         },
 142         {
 143                 (const char * const []){"LEN2001", NULL},
 144                 1024, 5022, 2508, 4832
 145         },
 146         { }
 147 };
 148
 149 /* This list has been kindly provided by Synaptics. */
 150 static const char * const topbuttonpad_pnp_ids[] = {
 151         "LEN0017",
 152         "LEN0018",
 153         "LEN0019",
 154         "LEN0023",
 155         "LEN002A",
 156         "LEN002B",
 157         "LEN002C",
 158         "LEN002D",
 159         "LEN002E",
 160         "LEN0033", /* Helix */
 161         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 162         "LEN0035", /* X240 */
 163         "LEN0036", /* T440 */
 164         "LEN0037",
 165         "LEN0038",
 166         "LEN0041",
 167         "LEN0042", /* Yoga */
 168         "LEN0045",
 169         "LEN0046",
 170         "LEN0047",
 171         "LEN0048",
 172         "LEN0049",
 173         "LEN2000",
 174         "LEN2001", /* Edge E431 */
 175         "LEN2002", /* Edge E531 */
 176         "LEN2003",
 177         "LEN2004", /* L440 */
 178         "LEN2005",
 179         "LEN2006",
 180         "LEN2007",
 181         "LEN2008",
 182         "LEN2009",
 183         "LEN200A",
 184         "LEN200B",
 185         NULL
 186 };
 187
 188 static bool matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
 189 {
 190         int i;
 191
 192         if (!strncmp(psmouse->ps2dev.serio->firmware_id, "PNP:", 4))
 193                 for (i = 0; ids[i]; i++)
 194                         if (strstr(psmouse->ps2dev.serio->firmware_id, ids[i]))
 195                                 return true;
 196
 197         return false;
 198 }
 199
 200 /*****************************************************************************
 201  *      Synaptics communications functions
 202  ****************************************************************************/
 203
 204 /*
 205  * Synaptics touchpads report the y coordinate from bottom to top, which is
 206  * opposite from what userspace expects.
 207  * This function is used to invert y before reporting.
 208  */
 209 static int synaptics_invert_y(int y)
 210 {
 211         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 212 }
 213
 214 /*
 215  * Send a command to the synpatics touchpad by special commands
 216  */
 217 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 218 {
 219         if (psmouse_sliced_command(psmouse, c))
 220                 return -1;
 221         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 222                 return -1;
 223         return 0;
 224 }
 225
 226 /*
 227  * Read the model-id bytes from the touchpad
 228  * see also SYN_MODEL_* macros
 229  */
 230 static int synaptics_model_id(struct psmouse *psmouse)
 231 {
 232         struct synaptics_data *priv = psmouse->private;
 233         unsigned char mi[3];
 234
 235         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 236                 return -1;
 237         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 238         return 0;
 239 }
 240
 241 /*
 242  * Read the board id from the touchpad
 243  * The board id is encoded in the "QUERY MODES" response
 244  */
 245 static int synaptics_board_id(struct psmouse *psmouse)
 246 {
 247         struct synaptics_data *priv = psmouse->private;
 248         unsigned char bid[3];
 249
 250         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 251                 return -1;
 252         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 253         return 0;
 254 }
 255
 256 /*
 257  * Read the firmware id from the touchpad
 258  */
 259 static int synaptics_firmware_id(struct psmouse *psmouse)
 260 {
 261         struct synaptics_data *priv = psmouse->private;
 262         unsigned char fwid[3];
 263
 264         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 265                 return -1;
 266         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 267         return 0;
 268 }
 269
 270 /*
 271  * Read the capability-bits from the touchpad
 272  * see also the SYN_CAP_* macros
 273  */
 274 static int synaptics_capability(struct psmouse *psmouse)
 275 {
 276         struct synaptics_data *priv = psmouse->private;
 277         unsigned char cap[3];
 278
 279         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 280                 return -1;
 281         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 282         priv->ext_cap = priv->ext_cap_0c = 0;
 283
 284         /*
 285          * Older firmwares had submodel ID fixed to 0x47
 286          */
 287         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 288             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 289                 return -1;
 290         }
 291
 292         /*
 293          * Unless capExtended is set the rest of the flags should be ignored
 294          */
 295         if (!SYN_CAP_EXTENDED(priv->capabilities))
 296                 priv->capabilities = 0;
 297
 298         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 299                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 300                         psmouse_warn(psmouse,
 301                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 302                 } else {
 303                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 304
 305                         /*
 306                          * if nExtBtn is greater than 8 it should be considered
 307                          * invalid and treated as 0
 308                          */
 309                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 310                                 priv->ext_cap &= 0xff0fff;
 311                 }
 312         }
 313
 314         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 315                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 316                         psmouse_warn(psmouse,
 317                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 318                 } else {
 319                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 320                 }
 321         }
 322
 323         return 0;
 324 }
 325
 326 /*
 327  * Identify Touchpad
 328  * See also the SYN_ID_* macros
 329  */
 330 static int synaptics_identify(struct psmouse *psmouse)
 331 {
 332         struct synaptics_data *priv = psmouse->private;
 333         unsigned char id[3];
 334
 335         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 336                 return -1;
 337         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 338         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 339                 return 0;
 340         return -1;
 341 }
 342
 343 /*
 344  * Read touchpad resolution and maximum reported coordinates
 345  * Resolution is left zero if touchpad does not support the query
 346  */
 347
 348 static int synaptics_resolution(struct psmouse *psmouse)
 349 {
 350         struct synaptics_data *priv = psmouse->private;
 351         unsigned char resp[3];
 352         int i;
 353
 354         if (SYN_ID_MAJOR(priv->identity) < 4)
 355                 return 0;
 356
 357         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 358                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 359                         priv->x_res = resp[0]; /* x resolution in units/mm */
 360                         priv->y_res = resp[2]; /* y resolution in units/mm */
 361                 }
 362         }
 363
 364         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 365                 if (matches_pnp_id(psmouse, min_max_pnpid_table[i].pnp_ids)) {
 366                         priv->x_min = min_max_pnpid_table[i].x_min;
 367                         priv->x_max = min_max_pnpid_table[i].x_max;
 368                         priv->y_min = min_max_pnpid_table[i].y_min;
 369                         priv->y_max = min_max_pnpid_table[i].y_max;
 370                         return 0;
 371                 }
 372         }
 373
 374         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 375             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 376                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 377                         psmouse_warn(psmouse,
 378                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 379                 } else {
 380                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 381                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 382                 }
 383         }
 384
 385         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 386             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 387                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 388                         psmouse_warn(psmouse,
 389                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 390                 } else {
 391                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 392                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 393                 }
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int synaptics_query_hardware(struct psmouse *psmouse)
 400 {
 401         if (synaptics_identify(psmouse))
 402                 return -1;
 403         if (synaptics_model_id(psmouse))
 404                 return -1;
 405         if (synaptics_firmware_id(psmouse))
 406                 return -1;
 407         if (synaptics_board_id(psmouse))
 408                 return -1;
 409         if (synaptics_capability(psmouse))
 410                 return -1;
 411         if (synaptics_resolution(psmouse))
 412                 return -1;
 413
 414         return 0;
 415 }
 416
 417 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 418 {
 419         static unsigned char param = 0xc8;
 420         struct synaptics_data *priv = psmouse->private;
 421
 422         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 423               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 424                 return 0;
 425
 426         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 427                 return -1;
 428
 429         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 430                 return -1;
 431
 432         /* Advanced gesture mode also sends multi finger data */
 433         priv->capabilities |= BIT(1);
 434
 435         return 0;
 436 }
 437
 438 static int synaptics_set_mode(struct psmouse *psmouse)
 439 {
 440         struct synaptics_data *priv = psmouse->private;
 441
 442         priv->mode = 0;
 443         if (priv->absolute_mode)
 444                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 445         if (priv->disable_gesture)
 446                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 447         if (psmouse->rate >= 80)
 448                 priv->mode |= SYN_BIT_HIGH_RATE;
 449         if (SYN_CAP_EXTENDED(priv->capabilities))
 450                 priv->mode |= SYN_BIT_W_MODE;
 451
 452         if (synaptics_mode_cmd(psmouse, priv->mode))
 453                 return -1;
 454
 455         if (priv->absolute_mode &&
 456             synaptics_set_advanced_gesture_mode(psmouse)) {
 457                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 458                 return -1;
 459         }
 460
 461         return 0;
 462 }
 463
 464 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 465 {
 466         struct synaptics_data *priv = psmouse->private;
 467
 468         if (rate >= 80) {
 469                 priv->mode |= SYN_BIT_HIGH_RATE;
 470                 psmouse->rate = 80;
 471         } else {
 472                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 473                 psmouse->rate = 40;
 474         }
 475
 476         synaptics_mode_cmd(psmouse, priv->mode);
 477 }
 478
 479 /*****************************************************************************
 480  *      Synaptics pass-through PS/2 port support
 481  ****************************************************************************/
 482 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 483 {
 484         struct psmouse *parent = serio_get_drvdata(serio->parent);
 485         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 486
 487         if (psmouse_sliced_command(parent, c))
 488                 return -1;
 489         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 490                 return -1;
 491         return 0;
 492 }
 493
 494 static int synaptics_pt_start(struct serio *serio)
 495 {
 496         struct psmouse *parent = serio_get_drvdata(serio->parent);
 497         struct synaptics_data *priv = parent->private;
 498
 499         serio_pause_rx(parent->ps2dev.serio);
 500         priv->pt_port = serio;
 501         serio_continue_rx(parent->ps2dev.serio);
 502
 503         return 0;
 504 }
 505
 506 static void synaptics_pt_stop(struct serio *serio)
 507 {
 508         struct psmouse *parent = serio_get_drvdata(serio->parent);
 509         struct synaptics_data *priv = parent->private;
 510
 511         serio_pause_rx(parent->ps2dev.serio);
 512         priv->pt_port = NULL;
 513         serio_continue_rx(parent->ps2dev.serio);
 514 }
 515
 516 static int synaptics_is_pt_packet(unsigned char *buf)
 517 {
 518         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 519 }
 520
 521 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 522 {
 523         struct psmouse *child = serio_get_drvdata(ptport);
 524
 525         if (child && child->state == PSMOUSE_ACTIVATED) {
 526                 serio_interrupt(ptport, packet[1], 0);
 527                 serio_interrupt(ptport, packet[4], 0);
 528                 serio_interrupt(ptport, packet[5], 0);
 529                 if (child->pktsize == 4)
 530                         serio_interrupt(ptport, packet[2], 0);
 531         } else
 532                 serio_interrupt(ptport, packet[1], 0);
 533 }
 534
 535 static void synaptics_pt_activate(struct psmouse *psmouse)
 536 {
 537         struct synaptics_data *priv = psmouse->private;
 538         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 539
 540         /* adjust the touchpad to child's choice of protocol */
 541         if (child) {
 542                 if (child->pktsize == 4)
 543                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 544                 else
 545                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 546
 547                 if (synaptics_mode_cmd(psmouse, priv->mode))
 548                         psmouse_warn(psmouse,
 549                                      "failed to switch guest protocol\n");
 550         }
 551 }
 552
 553 static void synaptics_pt_create(struct psmouse *psmouse)
 554 {
 555         struct serio *serio;
 556
 557         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 558         if (!serio) {
 559                 psmouse_err(psmouse,
 560                             "not enough memory for pass-through port\n");
 561                 return;
 562         }
 563
 564         serio->id.type = SERIO_PS_PSTHRU;
 565         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 566         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 567         serio->write = synaptics_pt_write;
 568         serio->start = synaptics_pt_start;
 569         serio->stop = synaptics_pt_stop;
 570         serio->parent = psmouse->ps2dev.serio;
 571
 572         psmouse->pt_activate = synaptics_pt_activate;
 573
 574         psmouse_info(psmouse, "serio: %s port at %s\n",
 575                      serio->name, psmouse->phys);
 576         serio_register_port(serio);
 577 }
 578
 579 /*****************************************************************************
 580  *      Functions to interpret the absolute mode packets
 581  ****************************************************************************/
 582
 583 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 584                                    int sgm, int agm)
 585 {
 586         state->count = count;
 587         state->sgm = sgm;
 588         state->agm = agm;
 589 }
 590
 591 static void synaptics_parse_agm(const unsigned char buf[],
 592                                 struct synaptics_data *priv,
 593                                 struct synaptics_hw_state *hw)
 594 {
 595         struct synaptics_hw_state *agm = &priv->agm;
 596         int agm_packet_type;
 597
 598         agm_packet_type = (buf[5] & 0x30) >> 4;
 599         switch (agm_packet_type) {
 600         case 1:
 601                 /* Gesture packet: (x, y, z) half resolution */
 602                 agm->w = hw->w;
 603                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 604                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 605                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 606                 break;
 607
 608         case 2:
 609                 /* AGM-CONTACT packet: (count, sgm, agm) */
 610                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 611                 break;
 612
 613         default:
 614                 break;
 615         }
 616
 617         /* Record that at least one AGM has been received since last SGM */
 618         priv->agm_pending = true;
 619 }
 620
 621 static int synaptics_parse_hw_state(const unsigned char buf[],
 622                                     struct synaptics_data *priv,
 623                                     struct synaptics_hw_state *hw)
 624 {
 625         memset(hw, 0, sizeof(struct synaptics_hw_state));
 626
 627         if (SYN_MODEL_NEWABS(priv->model_id)) {
 628                 hw->w = (((buf[0] & 0x30) >> 2) |
 629                          ((buf[0] & 0x04) >> 1) |
 630                          ((buf[3] & 0x04) >> 2));
 631
 632                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 633                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 634                     hw->w == 2) {
 635                         synaptics_parse_agm(buf, priv, hw);
 636                         return 1;
 637                 }
 638
 639                 hw->x = (((buf[3] & 0x10) << 8) |
 640                          ((buf[1] & 0x0f) << 8) |
 641                          buf[4]);
 642                 hw->y = (((buf[3] & 0x20) << 7) |
 643                          ((buf[1] & 0xf0) << 4) |
 644                          buf[5]);
 645                 hw->z = buf[2];
 646
 647                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 648                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 649
 650                 if (SYN_CAP_FORCEPAD(priv->ext_cap_0c)) {
 651                         /*
 652                          * ForcePads, like Clickpads, use middle button
 653                          * bits to report primary button clicks.
 654                          * Unfortunately they report primary button not
 655                          * only when user presses on the pad above certain
 656                          * threshold, but also when there are more than one
 657                          * finger on the touchpad, which interferes with
 658                          * out multi-finger gestures.
 659                          */
 660                         if (hw->z == 0) {
 661                                 /* No contacts */
 662                                 priv->press = priv->report_press = false;
 663                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 664                                 /*
 665                                  * Single-finger touch with pressure above
 666                                  * the threshold. If pressure stays long
 667                                  * enough, we'll start reporting primary
 668                                  * button. We rely on the device continuing
 669                                  * sending data even if finger does not
 670                                  * move.
 671                                  */
 672                                 if  (!priv->press) {
 673                                         priv->press_start = jiffies;
 674                                         priv->press = true;
 675                                 } else if (time_after(jiffies,
 676                                                 priv->press_start +
 677                                                         msecs_to_jiffies(50))) {
 678                                         priv->report_press = true;
 679                                 }
 680                         } else {
 681                                 priv->press = false;
 682                         }
 683
 684                         hw->left = priv->report_press;
 685
 686                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 687                         /*
 688                          * Clickpad's button is transmitted as middle button,
 689                          * however, since it is primary button, we will report
 690                          * it as BTN_LEFT.
 691                          */
 692                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 693
 694                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 695                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 696                         if (hw->w == 2)
 697                                 hw->scroll = (signed char)(buf[1]);
 698                 }
 699
 700                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 701                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 702                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 703                 }
 704
 705                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 706                     ((buf[0] ^ buf[3]) & 0x02)) {
 707                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 708                         default:
 709                                 /*
 710                                  * if nExtBtn is greater than 8 it should be
 711                                  * considered invalid and treated as 0
 712                                  */
 713                                 break;
 714                         case 8:
 715                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 716                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 717                         case 6:
 718                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 719                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 720                         case 4:
 721                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 722                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 723                         case 2:
 724                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 725                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 726                         }
 727                 }
 728         } else {
 729                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 730                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 731
 732                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 733                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 734
 735                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 736                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 737         }
 738
 739         /*
 740          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 741          * is used by some firmware to indicate a finger at the edge of
 742          * the touchpad whose precise position cannot be determined, so
 743          * convert these values to the maximum axis value.
 744          */
 745         if (hw->x > X_MAX_POSITIVE)
 746                 hw->x -= 1 << ABS_POS_BITS;
 747         else if (hw->x == X_MAX_POSITIVE)
 748                 hw->x = XMAX;
 749
 750         if (hw->y > Y_MAX_POSITIVE)
 751                 hw->y -= 1 << ABS_POS_BITS;
 752         else if (hw->y == Y_MAX_POSITIVE)
 753                 hw->y = YMAX;
 754
 755         return 0;
 756 }
 757
 758 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 759                                           bool active, int x, int y)
 760 {
 761         input_mt_slot(dev, slot);
 762         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 763         if (active) {
 764                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 765                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 766         }
 767 }
 768
 769 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 770                                           const struct synaptics_hw_state *a,
 771                                           const struct synaptics_hw_state *b,
 772                                           int num_fingers)
 773 {
 774         if (num_fingers >= 2) {
 775                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 776                                               min(a->y, b->y));
 777                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 778                                               max(a->y, b->y));
 779         } else if (num_fingers == 1) {
 780                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 781                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 782         } else {
 783                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 784                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 785         }
 786 }
 787
 788 static void synaptics_report_buttons(struct psmouse *psmouse,
 789                                      const struct synaptics_hw_state *hw)
 790 {
 791         struct input_dev *dev = psmouse->dev;
 792         struct synaptics_data *priv = psmouse->private;
 793         int i;
 794
 795         input_report_key(dev, BTN_LEFT, hw->left);
 796         input_report_key(dev, BTN_RIGHT, hw->right);
 797
 798         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 799                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 800
 801         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 802                 input_report_key(dev, BTN_FORWARD, hw->up);
 803                 input_report_key(dev, BTN_BACK, hw->down);
 804         }
 805
 806         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 807                 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
 808 }
 809
 810 static void synaptics_report_slot(struct input_dev *dev, int slot,
 811                                   const struct synaptics_hw_state *hw)
 812 {
 813         input_mt_slot(dev, slot);
 814         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 815         if (!hw)
 816                 return;
 817
 818         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 819         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 820         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 821 }
 822
 823 static void synaptics_report_mt_data(struct psmouse *psmouse,
 824                                      struct synaptics_mt_state *mt_state,
 825                                      const struct synaptics_hw_state *sgm)
 826 {
 827         struct input_dev *dev = psmouse->dev;
 828         struct synaptics_data *priv = psmouse->private;
 829         struct synaptics_hw_state *agm = &priv->agm;
 830         struct synaptics_mt_state *old = &priv->mt_state;
 831
 832         switch (mt_state->count) {
 833         case 0:
 834                 synaptics_report_slot(dev, 0, NULL);
 835                 synaptics_report_slot(dev, 1, NULL);
 836                 break;
 837         case 1:
 838                 if (mt_state->sgm == -1) {
 839                         synaptics_report_slot(dev, 0, NULL);
 840                         synaptics_report_slot(dev, 1, NULL);
 841                 } else if (mt_state->sgm == 0) {
 842                         synaptics_report_slot(dev, 0, sgm);
 843                         synaptics_report_slot(dev, 1, NULL);
 844                 } else {
 845                         synaptics_report_slot(dev, 0, NULL);
 846                         synaptics_report_slot(dev, 1, sgm);
 847                 }
 848                 break;
 849         default:
 850                 /*
 851                  * If the finger slot contained in SGM is valid, and either
 852                  * hasn't changed, or is new, or the old SGM has now moved to
 853                  * AGM, then report SGM in MTB slot 0.
 854                  * Otherwise, empty MTB slot 0.
 855                  */
 856                 if (mt_state->sgm != -1 &&
 857                     (mt_state->sgm == old->sgm ||
 858                      old->sgm == -1 || mt_state->agm == old->sgm))
 859                         synaptics_report_slot(dev, 0, sgm);
 860                 else
 861                         synaptics_report_slot(dev, 0, NULL);
 862
 863                 /*
 864                  * If the finger slot contained in AGM is valid, and either
 865                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 866                  * Otherwise, empty MTB slot 1.
 867                  *
 868                  * However, in the case where the AGM is new, make sure that
 869                  * that it is either the same as the old SGM, or there was no
 870                  * SGM.
 871                  *
 872                  * Otherwise, if the SGM was just 1, and the new AGM is 2, then
 873                  * the new AGM will keep the old SGM's tracking ID, which can
 874                  * cause apparent drumroll.  This happens if in the following
 875                  * valid finger sequence:
 876                  *
 877                  *  Action                 SGM  AGM (MTB slot:Contact)
 878                  *  1. Touch contact 0    (0:0)
 879                  *  2. Touch contact 1    (0:0, 1:1)
 880                  *  3. Lift  contact 0    (1:1)
 881                  *  4. Touch contacts 2,3 (0:2, 1:3)
 882                  *
 883                  * In step 4, contact 3, in AGM must not be given the same
 884                  * tracking ID as contact 1 had in step 3.  To avoid this,
 885                  * the first agm with contact 3 is dropped and slot 1 is
 886                  * invalidated (tracking ID = -1).
 887                  */
 888                 if (mt_state->agm != -1 &&
 889                     (mt_state->agm == old->agm ||
 890                      (old->agm == -1 &&
 891                       (old->sgm == -1 || mt_state->agm == old->sgm))))
 892                         synaptics_report_slot(dev, 1, agm);
 893                 else
 894                         synaptics_report_slot(dev, 1, NULL);
 895                 break;
 896         }
 897
 898         /* Don't use active slot count to generate BTN_TOOL events. */
 899         input_mt_report_pointer_emulation(dev, false);
 900
 901         /* Send the number of fingers reported by touchpad itself. */
 902         input_mt_report_finger_count(dev, mt_state->count);
 903
 904         synaptics_report_buttons(psmouse, sgm);
 905
 906         input_sync(dev);
 907 }
 908
 909 /* Handle case where mt_state->count = 0 */
 910 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
 911                                       struct synaptics_mt_state *mt_state)
 912 {
 913         synaptics_mt_state_set(mt_state, 0, -1, -1);
 914         priv->mt_state_lost = false;
 915 }
 916
 917 /* Handle case where mt_state->count = 1 */
 918 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
 919                                       struct synaptics_mt_state *mt_state)
 920 {
 921         struct synaptics_hw_state *agm = &priv->agm;
 922         struct synaptics_mt_state *old = &priv->mt_state;
 923
 924         /*
 925          * If the last AGM was (0,0,0), and there is only one finger left,
 926          * then we absolutely know that SGM contains slot 0, and all other
 927          * fingers have been removed.
 928          */
 929         if (priv->agm_pending && agm->z == 0) {
 930                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 931                 priv->mt_state_lost = false;
 932                 return;
 933         }
 934
 935         switch (old->count) {
 936         case 0:
 937                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 938                 break;
 939         case 1:
 940                 /*
 941                  * If mt_state_lost, then the previous transition was 3->1,
 942                  * and SGM now contains either slot 0 or 1, but we don't know
 943                  * which.  So, we just assume that the SGM now contains slot 1.
 944                  *
 945                  * If pending AGM and either:
 946                  *   (a) the previous SGM slot contains slot 0, or
 947                  *   (b) there was no SGM slot
 948                  * then, the SGM now contains slot 1
 949                  *
 950                  * Case (a) happens with very rapid "drum roll" gestures, where
 951                  * slot 0 finger is lifted and a new slot 1 finger touches
 952                  * within one reporting interval.
 953                  *
 954                  * Case (b) happens if initially two or more fingers tap
 955                  * briefly, and all but one lift before the end of the first
 956                  * reporting interval.
 957                  *
 958                  * (In both these cases, slot 0 will becomes empty, so SGM
 959                  * contains slot 1 with the new finger)
 960                  *
 961                  * Else, if there was no previous SGM, it now contains slot 0.
 962                  *
 963                  * Otherwise, SGM still contains the same slot.
 964                  */
 965                 if (priv->mt_state_lost ||
 966                     (priv->agm_pending && old->sgm <= 0))
 967                         synaptics_mt_state_set(mt_state, 1, 1, -1);
 968                 else if (old->sgm == -1)
 969                         synaptics_mt_state_set(mt_state, 1, 0, -1);
 970                 break;
 971         case 2:
 972                 /*
 973                  * If mt_state_lost, we don't know which finger SGM contains.
 974                  *
 975                  * So, report 1 finger, but with both slots empty.
 976                  * We will use slot 1 on subsequent 1->1
 977                  */
 978                 if (priv->mt_state_lost) {
 979                         synaptics_mt_state_set(mt_state, 1, -1, -1);
 980                         break;
 981                 }
 982                 /*
 983                  * Since the last AGM was NOT (0,0,0), it was the finger in
 984                  * slot 0 that has been removed.
 985                  * So, SGM now contains previous AGM's slot, and AGM is now
 986                  * empty.
 987                  */
 988                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
 989                 break;
 990         case 3:
 991                 /*
 992                  * Since last AGM was not (0,0,0), we don't know which finger
 993                  * is left.
 994                  *
 995                  * So, report 1 finger, but with both slots empty.
 996                  * We will use slot 1 on subsequent 1->1
 997                  */
 998                 synaptics_mt_state_set(mt_state, 1, -1, -1);
 999                 priv->mt_state_lost = true;
1000                 break;
1001         case 4:
1002         case 5:
1003                 /* mt_state was updated by AGM-CONTACT packet */
1004                 break;
1005         }
1006 }
1007
1008 /* Handle case where mt_state->count = 2 */
1009 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
1010                                       struct synaptics_mt_state *mt_state)
1011 {
1012         struct synaptics_mt_state *old = &priv->mt_state;
1013
1014         switch (old->count) {
1015         case 0:
1016                 synaptics_mt_state_set(mt_state, 2, 0, 1);
1017                 break;
1018         case 1:
1019                 /*
1020                  * If previous SGM contained slot 1 or higher, SGM now contains
1021                  * slot 0 (the newly touching finger) and AGM contains SGM's
1022                  * previous slot.
1023                  *
1024                  * Otherwise, SGM still contains slot 0 and AGM now contains
1025                  * slot 1.
1026                  */
1027                 if (old->sgm >= 1)
1028                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
1029                 else
1030                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1031                 break;
1032         case 2:
1033                 /*
1034                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
1035                  * we don't know which.
1036                  * So, we just assume that the SGM contains slot 0 and AGM 1.
1037                  */
1038                 if (priv->mt_state_lost)
1039                         synaptics_mt_state_set(mt_state, 2, 0, 1);
1040                 /*
1041                  * Otherwise, use the same mt_state, since it either hasn't
1042                  * changed, or was updated by a recently received AGM-CONTACT
1043                  * packet.
1044                  */
1045                 break;
1046         case 3:
1047                 /*
1048                  * 3->2 transitions have two unsolvable problems:
1049                  *  1) no indication is given which finger was removed
1050                  *  2) no way to tell if agm packet was for finger 3
1051                  *     before 3->2, or finger 2 after 3->2.
1052                  *
1053                  * So, report 2 fingers, but empty all slots.
1054                  * We will guess slots [0,1] on subsequent 2->2.
1055                  */
1056                 synaptics_mt_state_set(mt_state, 2, -1, -1);
1057                 priv->mt_state_lost = true;
1058                 break;
1059         case 4:
1060         case 5:
1061                 /* mt_state was updated by AGM-CONTACT packet */
1062                 break;
1063         }
1064 }
1065
1066 /* Handle case where mt_state->count = 3 */
1067 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
1068                                       struct synaptics_mt_state *mt_state)
1069 {
1070         struct synaptics_mt_state *old = &priv->mt_state;
1071
1072         switch (old->count) {
1073         case 0:
1074                 synaptics_mt_state_set(mt_state, 3, 0, 2);
1075                 break;
1076         case 1:
1077                 /*
1078                  * If previous SGM contained slot 2 or higher, SGM now contains
1079                  * slot 0 (one of the newly touching fingers) and AGM contains
1080                  * SGM's previous slot.
1081                  *
1082                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
1083                  */
1084                 if (old->sgm >= 2)
1085                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
1086                 else
1087                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1088                 break;
1089         case 2:
1090                 /*
1091                  * If the AGM previously contained slot 3 or higher, then the
1092                  * newly touching finger is in the lowest available slot.
1093                  *
1094                  * If SGM was previously 1 or higher, then the new SGM is
1095                  * now slot 0 (with a new finger), otherwise, the new finger
1096                  * is now in a hidden slot between 0 and AGM's slot.
1097                  *
1098                  * In all such cases, the SGM now contains slot 0, and the AGM
1099                  * continues to contain the same slot as before.
1100                  */
1101                 if (old->agm >= 3) {
1102                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
1103                         break;
1104                 }
1105
1106                 /*
1107                  * After some 3->1 and all 3->2 transitions, we lose track
1108                  * of which slot is reported by SGM and AGM.
1109                  *
1110                  * For 2->3 in this state, report 3 fingers, but empty all
1111                  * slots, and we will guess (0,2) on a subsequent 0->3.
1112                  *
1113                  * To userspace, the resulting transition will look like:
1114                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
1115                  */
1116                 if (priv->mt_state_lost) {
1117                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1118                         break;
1119                 }
1120
1121                 /*
1122                  * If the (SGM,AGM) really previously contained slots (0, 1),
1123                  * then we cannot know what slot was just reported by the AGM,
1124                  * because the 2->3 transition can occur either before or after
1125                  * the AGM packet. Thus, this most recent AGM could contain
1126                  * either the same old slot 1 or the new slot 2.
1127                  * Subsequent AGMs will be reporting slot 2.
1128                  *
1129                  * To userspace, the resulting transition will look like:
1130                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1131                  */
1132                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1133                 break;
1134         case 3:
1135                 /*
1136                  * If, for whatever reason, the previous agm was invalid,
1137                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1138                  */
1139                 if (old->agm <= 2)
1140                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1141                 /*
1142                  * mt_state either hasn't changed, or was updated by a recently
1143                  * received AGM-CONTACT packet.
1144                  */
1145                 break;
1146
1147         case 4:
1148         case 5:
1149                 /* mt_state was updated by AGM-CONTACT packet */
1150                 break;
1151         }
1152 }
1153
1154 /* Handle case where mt_state->count = 4, or = 5 */
1155 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1156                                        struct synaptics_mt_state *mt_state)
1157 {
1158         /* mt_state was updated correctly by AGM-CONTACT packet */
1159         priv->mt_state_lost = false;
1160 }
1161
1162 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1163                                            struct synaptics_hw_state *sgm)
1164 {
1165         struct synaptics_data *priv = psmouse->private;
1166         struct synaptics_hw_state *agm = &priv->agm;
1167         struct synaptics_mt_state mt_state;
1168
1169         /* Initialize using current mt_state (as updated by last agm) */
1170         mt_state = agm->mt_state;
1171
1172         /*
1173          * Update mt_state using the new finger count and current mt_state.
1174          */
1175         if (sgm->z == 0)
1176                 synaptics_image_sensor_0f(priv, &mt_state);
1177         else if (sgm->w >= 4)
1178                 synaptics_image_sensor_1f(priv, &mt_state);
1179         else if (sgm->w == 0)
1180                 synaptics_image_sensor_2f(priv, &mt_state);
1181         else if (sgm->w == 1 && mt_state.count <= 3)
1182                 synaptics_image_sensor_3f(priv, &mt_state);
1183         else
1184                 synaptics_image_sensor_45f(priv, &mt_state);
1185
1186         /* Send resulting input events to user space */
1187         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1188
1189         /* Store updated mt_state */
1190         priv->mt_state = agm->mt_state = mt_state;
1191         priv->agm_pending = false;
1192 }
1193
1194 static void synaptics_profile_sensor_process(struct psmouse *psmouse,
1195                                              struct synaptics_hw_state *sgm,
1196                                              int num_fingers)
1197 {
1198         struct input_dev *dev = psmouse->dev;
1199         struct synaptics_data *priv = psmouse->private;
1200         struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
1201         struct input_mt_pos pos[2];
1202         int slot[2], nsemi, i;
1203
1204         nsemi = clamp_val(num_fingers, 0, 2);
1205
1206         for (i = 0; i < nsemi; i++) {
1207                 pos[i].x = hw[i]->x;
1208                 pos[i].y = synaptics_invert_y(hw[i]->y);
1209         }
1210
1211         input_mt_assign_slots(dev, slot, pos, nsemi);
1212
1213         for (i = 0; i < nsemi; i++) {
1214                 input_mt_slot(dev, slot[i]);
1215                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1216                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1217                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1218                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1219         }
1220
1221         input_mt_drop_unused(dev);
1222         input_mt_report_pointer_emulation(dev, false);
1223         input_mt_report_finger_count(dev, num_fingers);
1224
1225         synaptics_report_buttons(psmouse, sgm);
1226
1227         input_sync(dev);
1228 }
1229
1230 /*
1231  *  called for each full received packet from the touchpad
1232  */
1233 static void synaptics_process_packet(struct psmouse *psmouse)
1234 {
1235         struct input_dev *dev = psmouse->dev;
1236         struct synaptics_data *priv = psmouse->private;
1237         struct synaptics_hw_state hw;
1238         int num_fingers;
1239         int finger_width;
1240
1241         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1242                 return;
1243
1244         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1245                 synaptics_image_sensor_process(psmouse, &hw);
1246                 return;
1247         }
1248
1249         if (hw.scroll) {
1250                 priv->scroll += hw.scroll;
1251
1252                 while (priv->scroll >= 4) {
1253                         input_report_key(dev, BTN_BACK, !hw.down);
1254                         input_sync(dev);
1255                         input_report_key(dev, BTN_BACK, hw.down);
1256                         input_sync(dev);
1257                         priv->scroll -= 4;
1258                 }
1259                 while (priv->scroll <= -4) {
1260                         input_report_key(dev, BTN_FORWARD, !hw.up);
1261                         input_sync(dev);
1262                         input_report_key(dev, BTN_FORWARD, hw.up);
1263                         input_sync(dev);
1264                         priv->scroll += 4;
1265                 }
1266                 return;
1267         }
1268
1269         if (hw.z > 0 && hw.x > 1) {
1270                 num_fingers = 1;
1271                 finger_width = 5;
1272                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1273                         switch (hw.w) {
1274                         case 0 ... 1:
1275                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1276                                         num_fingers = hw.w + 2;
1277                                 break;
1278                         case 2:
1279                                 if (SYN_MODEL_PEN(priv->model_id))
1280                                         ;   /* Nothing, treat a pen as a single finger */
1281                                 break;
1282                         case 4 ... 15:
1283                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1284                                         finger_width = hw.w;
1285                                 break;
1286                         }
1287                 }
1288         } else {
1289                 num_fingers = 0;
1290                 finger_width = 0;
1291         }
1292
1293         if (cr48_profile_sensor) {
1294                 synaptics_profile_sensor_process(psmouse, &hw, num_fingers);
1295                 return;
1296         }
1297
1298         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1299                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1300                                               num_fingers);
1301
1302         /* Post events
1303          * BTN_TOUCH has to be first as mousedev relies on it when doing
1304          * absolute -> relative conversion
1305          */
1306         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1307         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1308
1309         if (num_fingers > 0) {
1310                 input_report_abs(dev, ABS_X, hw.x);
1311                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1312         }
1313         input_report_abs(dev, ABS_PRESSURE, hw.z);
1314
1315         if (SYN_CAP_PALMDETECT(priv->capabilities))
1316                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1317
1318         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1319         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1320                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1321                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1322         }
1323
1324         synaptics_report_buttons(psmouse, &hw);
1325
1326         input_sync(dev);
1327 }
1328
1329 static int synaptics_validate_byte(struct psmouse *psmouse,
1330                                    int idx, unsigned char pkt_type)
1331 {
1332         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1333         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1334         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1335         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1336         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1337         const char *packet = psmouse->packet;
1338
1339         if (idx < 0 || idx > 4)
1340                 return 0;
1341
1342         switch (pkt_type) {
1343
1344         case SYN_NEWABS:
1345         case SYN_NEWABS_RELAXED:
1346                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1347
1348         case SYN_NEWABS_STRICT:
1349                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1350
1351         case SYN_OLDABS:
1352                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1353
1354         default:
1355                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1356                 return 0;
1357         }
1358 }
1359
1360 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1361 {
1362         int i;
1363
1364         for (i = 0; i < 5; i++)
1365                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1366                         psmouse_info(psmouse, "using relaxed packet validation\n");
1367                         return SYN_NEWABS_RELAXED;
1368                 }
1369
1370         return SYN_NEWABS_STRICT;
1371 }
1372
1373 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1374 {
1375         struct synaptics_data *priv = psmouse->private;
1376
1377         if (psmouse->pktcnt >= 6) { /* Full packet received */
1378                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1379                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1380
1381                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1382                     synaptics_is_pt_packet(psmouse->packet)) {
1383                         if (priv->pt_port)
1384                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1385                 } else
1386                         synaptics_process_packet(psmouse);
1387
1388                 return PSMOUSE_FULL_PACKET;
1389         }
1390
1391         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1392                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1393 }
1394
1395 /*****************************************************************************
1396  *      Driver initialization/cleanup functions
1397  ****************************************************************************/
1398 static void set_abs_position_params(struct input_dev *dev,
1399                                     struct synaptics_data *priv, int x_code,
1400                                     int y_code)
1401 {
1402         int x_min = priv->x_min ?: XMIN_NOMINAL;
1403         int x_max = priv->x_max ?: XMAX_NOMINAL;
1404         int y_min = priv->y_min ?: YMIN_NOMINAL;
1405         int y_max = priv->y_max ?: YMAX_NOMINAL;
1406         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1407                         SYN_REDUCED_FILTER_FUZZ : 0;
1408
1409         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1410         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1411         input_abs_set_res(dev, x_code, priv->x_res);
1412         input_abs_set_res(dev, y_code, priv->y_res);
1413 }
1414
1415 static void set_input_params(struct psmouse *psmouse,
1416                              struct synaptics_data *priv)
1417 {
1418         struct input_dev *dev = psmouse->dev;
1419         int i;
1420
1421         /* Things that apply to both modes */
1422         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1423         __set_bit(EV_KEY, dev->evbit);
1424         __set_bit(BTN_LEFT, dev->keybit);
1425         __set_bit(BTN_RIGHT, dev->keybit);
1426
1427         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1428                 __set_bit(BTN_MIDDLE, dev->keybit);
1429
1430         if (!priv->absolute_mode) {
1431                 /* Relative mode */
1432                 __set_bit(EV_REL, dev->evbit);
1433                 __set_bit(REL_X, dev->relbit);
1434                 __set_bit(REL_Y, dev->relbit);
1435                 return;
1436         }
1437
1438         /* Absolute mode */
1439         __set_bit(EV_ABS, dev->evbit);
1440         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1441         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1442
1443         if (cr48_profile_sensor)
1444                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1445
1446         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1447                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1448                                         ABS_MT_POSITION_Y);
1449                 /* Image sensors can report per-contact pressure */
1450                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1451                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER);
1452
1453                 /* Image sensors can signal 4 and 5 finger clicks */
1454                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1455                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1456         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1457                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1458                                         ABS_MT_POSITION_Y);
1459                 /*
1460                  * Profile sensor in CR-48 tracks contacts reasonably well,
1461                  * other non-image sensors with AGM use semi-mt.
1462                  */
1463                 input_mt_init_slots(dev, 2,
1464                                     INPUT_MT_POINTER |
1465                                     (cr48_profile_sensor ?
1466                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1467         }
1468
1469         if (SYN_CAP_PALMDETECT(priv->capabilities))
1470                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1471
1472         __set_bit(BTN_TOUCH, dev->keybit);
1473         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1474
1475         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1476                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1477                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1478         }
1479
1480         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1481             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1482                 __set_bit(BTN_FORWARD, dev->keybit);
1483                 __set_bit(BTN_BACK, dev->keybit);
1484         }
1485
1486         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1487                 __set_bit(BTN_0 + i, dev->keybit);
1488
1489         __clear_bit(EV_REL, dev->evbit);
1490         __clear_bit(REL_X, dev->relbit);
1491         __clear_bit(REL_Y, dev->relbit);
1492
1493         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1494                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1495                 if (matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1496                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1497                 /* Clickpads report only left button */
1498                 __clear_bit(BTN_RIGHT, dev->keybit);
1499                 __clear_bit(BTN_MIDDLE, dev->keybit);
1500         }
1501 }
1502
1503 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1504                                               void *data, char *buf)
1505 {
1506         struct synaptics_data *priv = psmouse->private;
1507
1508         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1509 }
1510
1511 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1512                                              void *data, const char *buf,
1513                                              size_t len)
1514 {
1515         struct synaptics_data *priv = psmouse->private;
1516         unsigned int value;
1517         int err;
1518
1519         err = kstrtouint(buf, 10, &value);
1520         if (err)
1521                 return err;
1522
1523         if (value > 1)
1524                 return -EINVAL;
1525
1526         if (value == priv->disable_gesture)
1527                 return len;
1528
1529         priv->disable_gesture = value;
1530         if (value)
1531                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1532         else
1533                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1534
1535         if (synaptics_mode_cmd(psmouse, priv->mode))
1536                 return -EIO;
1537
1538         return len;
1539 }
1540
1541 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1542                     synaptics_show_disable_gesture,
1543                     synaptics_set_disable_gesture);
1544
1545 static void synaptics_disconnect(struct psmouse *psmouse)
1546 {
1547         struct synaptics_data *priv = psmouse->private;
1548
1549         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1550                 device_remove_file(&psmouse->ps2dev.serio->dev,
1551                                    &psmouse_attr_disable_gesture.dattr);
1552
1553         synaptics_reset(psmouse);
1554         kfree(priv);
1555         psmouse->private = NULL;
1556 }
1557
1558 static int synaptics_reconnect(struct psmouse *psmouse)
1559 {
1560         struct synaptics_data *priv = psmouse->private;
1561         struct synaptics_data old_priv = *priv;
1562         unsigned char param[2];
1563         int retry = 0;
1564         int error;
1565
1566         do {
1567                 psmouse_reset(psmouse);
1568                 if (retry) {
1569                         /*
1570                          * On some boxes, right after resuming, the touchpad
1571                          * needs some time to finish initializing (I assume
1572                          * it needs time to calibrate) and start responding
1573                          * to Synaptics-specific queries, so let's wait a
1574                          * bit.
1575                          */
1576                         ssleep(1);
1577                 }
1578                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1579                 error = synaptics_detect(psmouse, 0);
1580         } while (error && ++retry < 3);
1581
1582         if (error)
1583                 return -1;
1584
1585         if (retry > 1)
1586                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1587
1588         if (synaptics_query_hardware(psmouse)) {
1589                 psmouse_err(psmouse, "Unable to query device.\n");
1590                 return -1;
1591         }
1592
1593         if (synaptics_set_mode(psmouse)) {
1594                 psmouse_err(psmouse, "Unable to initialize device.\n");
1595                 return -1;
1596         }
1597
1598         if (old_priv.identity != priv->identity ||
1599             old_priv.model_id != priv->model_id ||
1600             old_priv.capabilities != priv->capabilities ||
1601             old_priv.ext_cap != priv->ext_cap) {
1602                 psmouse_err(psmouse,
1603                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1604                             old_priv.identity, priv->identity,
1605                             old_priv.model_id, priv->model_id,
1606                             old_priv.capabilities, priv->capabilities,
1607                             old_priv.ext_cap, priv->ext_cap);
1608                 return -1;
1609         }
1610
1611         return 0;
1612 }
1613
1614 static bool impaired_toshiba_kbc;
1615
1616 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1617 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1618         {
1619                 /* Toshiba Satellite */
1620                 .matches = {
1621                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1622                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1623                 },
1624         },
1625         {
1626                 /* Toshiba Dynabook */
1627                 .matches = {
1628                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1629                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1630                 },
1631         },
1632         {
1633                 /* Toshiba Portege M300 */
1634                 .matches = {
1635                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1636                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1637                 },
1638
1639         },
1640         {
1641                 /* Toshiba Portege M300 */
1642                 .matches = {
1643                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1644                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1645                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1646                 },
1647
1648         },
1649 #endif
1650         { }
1651 };
1652
1653 static bool broken_olpc_ec;
1654
1655 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1656 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1657         {
1658                 /* OLPC XO-1 or XO-1.5 */
1659                 .matches = {
1660                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1661                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1662                 },
1663         },
1664 #endif
1665         { }
1666 };
1667
1668 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1669 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1670         {
1671                 /* Cr-48 Chromebook (Codename Mario) */
1672                 .matches = {
1673                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1674                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1675                 },
1676         },
1677 #endif
1678         { }
1679 };
1680
1681 void __init synaptics_module_init(void)
1682 {
1683         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1684         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1685         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1686 }
1687
1688 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1689 {
1690         struct synaptics_data *priv;
1691         int err = -1;
1692
1693         /*
1694          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1695          * packet spew overloads the EC such that key presses on the keyboard
1696          * are missed.  Given that, don't even attempt to use Absolute mode.
1697          * Relative mode seems to work just fine.
1698          */
1699         if (absolute_mode && broken_olpc_ec) {
1700                 psmouse_info(psmouse,
1701                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1702                 return -ENODEV;
1703         }
1704
1705         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1706         if (!priv)
1707                 return -ENOMEM;
1708
1709         psmouse_reset(psmouse);
1710
1711         if (synaptics_query_hardware(psmouse)) {
1712                 psmouse_err(psmouse, "Unable to query device.\n");
1713                 goto init_fail;
1714         }
1715
1716         priv->absolute_mode = absolute_mode;
1717         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1718                 priv->disable_gesture = true;
1719
1720         if (synaptics_set_mode(psmouse)) {
1721                 psmouse_err(psmouse, "Unable to initialize device.\n");
1722                 goto init_fail;
1723         }
1724
1725         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1726
1727         psmouse_info(psmouse,
1728                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1729                      SYN_ID_MODEL(priv->identity),
1730                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1731                      priv->model_id,
1732                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1733                      priv->board_id, priv->firmware_id);
1734
1735         set_input_params(psmouse, priv);
1736
1737         /*
1738          * Encode touchpad model so that it can be used to set
1739          * input device->id.version and be visible to userspace.
1740          * Because version is __u16 we have to drop something.
1741          * Hardware info bits seem to be good candidates as they
1742          * are documented to be for Synaptics corp. internal use.
1743          */
1744         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1745                           (priv->model_id & 0x000000ff);
1746
1747         if (absolute_mode) {
1748                 psmouse->protocol_handler = synaptics_process_byte;
1749                 psmouse->pktsize = 6;
1750         } else {
1751                 /* Relative mode follows standard PS/2 mouse protocol */
1752                 psmouse->protocol_handler = psmouse_process_byte;
1753                 psmouse->pktsize = 3;
1754         }
1755
1756         psmouse->set_rate = synaptics_set_rate;
1757         psmouse->disconnect = synaptics_disconnect;
1758         psmouse->reconnect = synaptics_reconnect;
1759         psmouse->cleanup = synaptics_reset;
1760         /* Synaptics can usually stay in sync without extra help */
1761         psmouse->resync_time = 0;
1762
1763         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1764                 synaptics_pt_create(psmouse);
1765
1766         /*
1767          * Toshiba's KBC seems to have trouble handling data from
1768          * Synaptics at full rate.  Switch to a lower rate (roughly
1769          * the same rate as a standard PS/2 mouse).
1770          */
1771         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1772                 psmouse_info(psmouse,
1773                              "Toshiba %s detected, limiting rate to 40pps.\n",
1774                              dmi_get_system_info(DMI_PRODUCT_NAME));
1775                 psmouse->rate = 40;
1776         }
1777
1778         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1779                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1780                                          &psmouse_attr_disable_gesture.dattr);
1781                 if (err) {
1782                         psmouse_err(psmouse,
1783                                     "Failed to create disable_gesture attribute (%d)",
1784                                     err);
1785                         goto init_fail;
1786                 }
1787         }
1788
1789         return 0;
1790
1791  init_fail:
1792         kfree(priv);
1793         return err;
1794 }
1795
1796 int synaptics_init(struct psmouse *psmouse)
1797 {
1798         return __synaptics_init(psmouse, true);
1799 }
1800
1801 int synaptics_init_relative(struct psmouse *psmouse)
1802 {
1803         return __synaptics_init(psmouse, false);
1804 }
1805
1806 bool synaptics_supported(void)
1807 {
1808         return true;
1809 }
1810
1811 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1812
1813 void __init synaptics_module_init(void)
1814 {
1815 }
1816
1817 int synaptics_init(struct psmouse *psmouse)
1818 {
1819         return -ENOSYS;
1820 }
1821
1822 bool synaptics_supported(void)
1823 {
1824         return false;
1825 }
1826
1827 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */