drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /* maximum ABS_MT_POSITION displacement (in mm) */
  71 #define DMAX 10
  72
  73 /*****************************************************************************
  74  *      Stuff we need even when we do not want native Synaptics support
  75  ****************************************************************************/
  76
  77 /*
  78  * Set the synaptics touchpad mode byte by special commands
  79  */
  80 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  81 {
  82         unsigned char param[1];
  83
  84         if (psmouse_sliced_command(psmouse, mode))
  85                 return -1;
  86         param[0] = SYN_PS_SET_MODE2;
  87         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  88                 return -1;
  89         return 0;
  90 }
  91
  92 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  93 {
  94         struct ps2dev *ps2dev = &psmouse->ps2dev;
  95         unsigned char param[4];
  96
  97         param[0] = 0;
  98
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 101         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 104
 105         if (param[1] != 0x47)
 106                 return -ENODEV;
 107
 108         if (set_properties) {
 109                 psmouse->vendor = "Synaptics";
 110                 psmouse->name = "TouchPad";
 111         }
 112
 113         return 0;
 114 }
 115
 116 void synaptics_reset(struct psmouse *psmouse)
 117 {
 118         /* reset touchpad back to relative mode, gestures enabled */
 119         synaptics_mode_cmd(psmouse, 0);
 120 }
 121
 122 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 123
 124 static bool cr48_profile_sensor;
 125
 126 #define ANY_BOARD_ID 0
 127 struct min_max_quirk {
 128         const char * const *pnp_ids;
 129         struct {
 130                 unsigned long int min, max;
 131         } board_id;
 132         int x_min, x_max, y_min, y_max;
 133 };
 134
 135 static const struct min_max_quirk min_max_pnpid_table[] = {
 136         {
 137                 (const char * const []){"LEN0033", NULL},
 138                 {ANY_BOARD_ID, ANY_BOARD_ID},
 139                 1024, 5052, 2258, 4832
 140         },
 141         {
 142                 (const char * const []){"LEN0042", NULL},
 143                 {ANY_BOARD_ID, ANY_BOARD_ID},
 144                 1232, 5710, 1156, 4696
 145         },
 146         {
 147                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 148                                         "LEN0039", "LEN2002", "LEN2004",
 149                                         NULL},
 150                 {ANY_BOARD_ID, 2961},
 151                 1024, 5112, 2024, 4832
 152         },
 153         {
 154                 (const char * const []){"LEN2001", NULL},
 155                 {ANY_BOARD_ID, ANY_BOARD_ID},
 156                 1024, 5022, 2508, 4832
 157         },
 158         {
 159                 (const char * const []){"LEN2006", NULL},
 160                 {ANY_BOARD_ID, ANY_BOARD_ID},
 161                 1264, 5675, 1171, 4688
 162         },
 163         { }
 164 };
 165
 166 /* This list has been kindly provided by Synaptics. */
 167 static const char * const topbuttonpad_pnp_ids[] = {
 168         "LEN0017",
 169         "LEN0018",
 170         "LEN0019",
 171         "LEN0023",
 172         "LEN002A",
 173         "LEN002B",
 174         "LEN002C",
 175         "LEN002D",
 176         "LEN002E",
 177         "LEN0033", /* Helix */
 178         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 179         "LEN0035", /* X240 */
 180         "LEN0036", /* T440 */
 181         "LEN0037", /* X1 Carbon 2nd */
 182         "LEN0038",
 183         "LEN0039", /* T440s */
 184         "LEN0041",
 185         "LEN0042", /* Yoga */
 186         "LEN0045",
 187         "LEN0047",
 188         "LEN0049",
 189         "LEN2000",
 190         "LEN2001", /* Edge E431 */
 191         "LEN2002", /* Edge E531 */
 192         "LEN2003",
 193         "LEN2004", /* L440 */
 194         "LEN2005",
 195         "LEN2006",
 196         "LEN2007",
 197         "LEN2008",
 198         "LEN2009",
 199         "LEN200A",
 200         "LEN200B",
 201         NULL
 202 };
 203
 204 /*****************************************************************************
 205  *      Synaptics communications functions
 206  ****************************************************************************/
 207
 208 /*
 209  * Synaptics touchpads report the y coordinate from bottom to top, which is
 210  * opposite from what userspace expects.
 211  * This function is used to invert y before reporting.
 212  */
 213 static int synaptics_invert_y(int y)
 214 {
 215         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 216 }
 217
 218 /*
 219  * Send a command to the synpatics touchpad by special commands
 220  */
 221 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 222 {
 223         if (psmouse_sliced_command(psmouse, c))
 224                 return -1;
 225         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 226                 return -1;
 227         return 0;
 228 }
 229
 230 /*
 231  * Read the model-id bytes from the touchpad
 232  * see also SYN_MODEL_* macros
 233  */
 234 static int synaptics_model_id(struct psmouse *psmouse)
 235 {
 236         struct synaptics_data *priv = psmouse->private;
 237         unsigned char mi[3];
 238
 239         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 240                 return -1;
 241         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 242         return 0;
 243 }
 244
 245 static int synaptics_more_extended_queries(struct psmouse *psmouse)
 246 {
 247         struct synaptics_data *priv = psmouse->private;
 248         unsigned char buf[3];
 249
 250         if (synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf))
 251                 return -1;
 252
 253         priv->ext_cap_10 = (buf[0]<<16) | (buf[1]<<8) | buf[2];
 254
 255         return 0;
 256 }
 257
 258 /*
 259  * Read the board id and the "More Extended Queries" from the touchpad
 260  * The board id is encoded in the "QUERY MODES" response
 261  */
 262 static int synaptics_query_modes(struct psmouse *psmouse)
 263 {
 264         struct synaptics_data *priv = psmouse->private;
 265         unsigned char bid[3];
 266
 267         /* firmwares prior 7.5 have no board_id encoded */
 268         if (SYN_ID_FULL(priv->identity) < 0x705)
 269                 return 0;
 270
 271         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 272                 return -1;
 273         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 274
 275         if (SYN_MEXT_CAP_BIT(bid[0]))
 276                 return synaptics_more_extended_queries(psmouse);
 277
 278         return 0;
 279 }
 280
 281 /*
 282  * Read the firmware id from the touchpad
 283  */
 284 static int synaptics_firmware_id(struct psmouse *psmouse)
 285 {
 286         struct synaptics_data *priv = psmouse->private;
 287         unsigned char fwid[3];
 288
 289         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 290                 return -1;
 291         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 292         return 0;
 293 }
 294
 295 /*
 296  * Read the capability-bits from the touchpad
 297  * see also the SYN_CAP_* macros
 298  */
 299 static int synaptics_capability(struct psmouse *psmouse)
 300 {
 301         struct synaptics_data *priv = psmouse->private;
 302         unsigned char cap[3];
 303
 304         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 305                 return -1;
 306         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 307         priv->ext_cap = priv->ext_cap_0c = 0;
 308
 309         /*
 310          * Older firmwares had submodel ID fixed to 0x47
 311          */
 312         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 313             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 314                 return -1;
 315         }
 316
 317         /*
 318          * Unless capExtended is set the rest of the flags should be ignored
 319          */
 320         if (!SYN_CAP_EXTENDED(priv->capabilities))
 321                 priv->capabilities = 0;
 322
 323         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 324                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 325                         psmouse_warn(psmouse,
 326                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 327                 } else {
 328                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 329
 330                         /*
 331                          * if nExtBtn is greater than 8 it should be considered
 332                          * invalid and treated as 0
 333                          */
 334                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 335                                 priv->ext_cap &= 0xff0fff;
 336                 }
 337         }
 338
 339         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 340                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 341                         psmouse_warn(psmouse,
 342                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 343                 } else {
 344                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 345                 }
 346         }
 347
 348         return 0;
 349 }
 350
 351 /*
 352  * Identify Touchpad
 353  * See also the SYN_ID_* macros
 354  */
 355 static int synaptics_identify(struct psmouse *psmouse)
 356 {
 357         struct synaptics_data *priv = psmouse->private;
 358         unsigned char id[3];
 359
 360         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 361                 return -1;
 362         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 363         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 364                 return 0;
 365         return -1;
 366 }
 367
 368 /*
 369  * Read touchpad resolution and maximum reported coordinates
 370  * Resolution is left zero if touchpad does not support the query
 371  */
 372
 373 static int synaptics_resolution(struct psmouse *psmouse)
 374 {
 375         struct synaptics_data *priv = psmouse->private;
 376         unsigned char resp[3];
 377
 378         if (SYN_ID_MAJOR(priv->identity) < 4)
 379                 return 0;
 380
 381         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 382                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 383                         priv->x_res = resp[0]; /* x resolution in units/mm */
 384                         priv->y_res = resp[2]; /* y resolution in units/mm */
 385                 }
 386         }
 387
 388         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 389             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 390                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 391                         psmouse_warn(psmouse,
 392                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 393                 } else {
 394                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 395                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 396                         psmouse_info(psmouse,
 397                                      "queried max coordinates: x [..%d], y [..%d]\n",
 398                                      priv->x_max, priv->y_max);
 399                 }
 400         }
 401
 402         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 403             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 404              /*
 405               * Firmware v8.1 does not report proper number of extended
 406               * capabilities, but has been proven to report correct min
 407               * coordinates.
 408               */
 409              SYN_ID_FULL(priv->identity) == 0x801)) {
 410                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 411                         psmouse_warn(psmouse,
 412                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 413                 } else {
 414                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 415                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 416                         psmouse_info(psmouse,
 417                                      "queried min coordinates: x [%d..], y [%d..]\n",
 418                                      priv->x_min, priv->y_min);
 419                 }
 420         }
 421
 422         return 0;
 423 }
 424
 425 /*
 426  * Apply quirk(s) if the hardware matches
 427  */
 428
 429 static void synaptics_apply_quirks(struct psmouse *psmouse)
 430 {
 431         struct synaptics_data *priv = psmouse->private;
 432         int i;
 433
 434         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 435                 if (!psmouse_matches_pnp_id(psmouse,
 436                                             min_max_pnpid_table[i].pnp_ids))
 437                         continue;
 438
 439                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 440                     priv->board_id < min_max_pnpid_table[i].board_id.min)
 441                         continue;
 442
 443                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 444                     priv->board_id > min_max_pnpid_table[i].board_id.max)
 445                         continue;
 446
 447                 priv->x_min = min_max_pnpid_table[i].x_min;
 448                 priv->x_max = min_max_pnpid_table[i].x_max;
 449                 priv->y_min = min_max_pnpid_table[i].y_min;
 450                 priv->y_max = min_max_pnpid_table[i].y_max;
 451                 psmouse_info(psmouse,
 452                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 453                              priv->x_min, priv->x_max,
 454                              priv->y_min, priv->y_max);
 455                 break;
 456         }
 457 }
 458
 459 static int synaptics_query_hardware(struct psmouse *psmouse)
 460 {
 461         if (synaptics_identify(psmouse))
 462                 return -1;
 463         if (synaptics_model_id(psmouse))
 464                 return -1;
 465         if (synaptics_firmware_id(psmouse))
 466                 return -1;
 467         if (synaptics_query_modes(psmouse))
 468                 return -1;
 469         if (synaptics_capability(psmouse))
 470                 return -1;
 471         if (synaptics_resolution(psmouse))
 472                 return -1;
 473
 474         synaptics_apply_quirks(psmouse);
 475
 476         return 0;
 477 }
 478
 479 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 480 {
 481         static unsigned char param = 0xc8;
 482         struct synaptics_data *priv = psmouse->private;
 483
 484         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 485               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 486                 return 0;
 487
 488         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 489                 return -1;
 490
 491         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 492                 return -1;
 493
 494         /* Advanced gesture mode also sends multi finger data */
 495         priv->capabilities |= BIT(1);
 496
 497         return 0;
 498 }
 499
 500 static int synaptics_set_mode(struct psmouse *psmouse)
 501 {
 502         struct synaptics_data *priv = psmouse->private;
 503
 504         priv->mode = 0;
 505         if (priv->absolute_mode)
 506                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 507         if (priv->disable_gesture)
 508                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 509         if (psmouse->rate >= 80)
 510                 priv->mode |= SYN_BIT_HIGH_RATE;
 511         if (SYN_CAP_EXTENDED(priv->capabilities))
 512                 priv->mode |= SYN_BIT_W_MODE;
 513
 514         if (synaptics_mode_cmd(psmouse, priv->mode))
 515                 return -1;
 516
 517         if (priv->absolute_mode &&
 518             synaptics_set_advanced_gesture_mode(psmouse)) {
 519                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 520                 return -1;
 521         }
 522
 523         return 0;
 524 }
 525
 526 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 527 {
 528         struct synaptics_data *priv = psmouse->private;
 529
 530         if (rate >= 80) {
 531                 priv->mode |= SYN_BIT_HIGH_RATE;
 532                 psmouse->rate = 80;
 533         } else {
 534                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 535                 psmouse->rate = 40;
 536         }
 537
 538         synaptics_mode_cmd(psmouse, priv->mode);
 539 }
 540
 541 /*****************************************************************************
 542  *      Synaptics pass-through PS/2 port support
 543  ****************************************************************************/
 544 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 545 {
 546         struct psmouse *parent = serio_get_drvdata(serio->parent);
 547         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 548
 549         if (psmouse_sliced_command(parent, c))
 550                 return -1;
 551         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 552                 return -1;
 553         return 0;
 554 }
 555
 556 static int synaptics_pt_start(struct serio *serio)
 557 {
 558         struct psmouse *parent = serio_get_drvdata(serio->parent);
 559         struct synaptics_data *priv = parent->private;
 560
 561         serio_pause_rx(parent->ps2dev.serio);
 562         priv->pt_port = serio;
 563         serio_continue_rx(parent->ps2dev.serio);
 564
 565         return 0;
 566 }
 567
 568 static void synaptics_pt_stop(struct serio *serio)
 569 {
 570         struct psmouse *parent = serio_get_drvdata(serio->parent);
 571         struct synaptics_data *priv = parent->private;
 572
 573         serio_pause_rx(parent->ps2dev.serio);
 574         priv->pt_port = NULL;
 575         serio_continue_rx(parent->ps2dev.serio);
 576 }
 577
 578 static int synaptics_is_pt_packet(unsigned char *buf)
 579 {
 580         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 581 }
 582
 583 static void synaptics_pass_pt_packet(struct psmouse *psmouse,
 584                                      struct serio *ptport,
 585                                      unsigned char *packet)
 586 {
 587         struct synaptics_data *priv = psmouse->private;
 588         struct psmouse *child = serio_get_drvdata(ptport);
 589
 590         if (child && child->state == PSMOUSE_ACTIVATED) {
 591                 serio_interrupt(ptport, packet[1] | priv->pt_buttons, 0);
 592                 serio_interrupt(ptport, packet[4], 0);
 593                 serio_interrupt(ptport, packet[5], 0);
 594                 if (child->pktsize == 4)
 595                         serio_interrupt(ptport, packet[2], 0);
 596         } else {
 597                 serio_interrupt(ptport, packet[1], 0);
 598         }
 599 }
 600
 601 static void synaptics_pt_activate(struct psmouse *psmouse)
 602 {
 603         struct synaptics_data *priv = psmouse->private;
 604         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 605
 606         /* adjust the touchpad to child's choice of protocol */
 607         if (child) {
 608                 if (child->pktsize == 4)
 609                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 610                 else
 611                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 612
 613                 if (synaptics_mode_cmd(psmouse, priv->mode))
 614                         psmouse_warn(psmouse,
 615                                      "failed to switch guest protocol\n");
 616         }
 617 }
 618
 619 static void synaptics_pt_create(struct psmouse *psmouse)
 620 {
 621         struct serio *serio;
 622
 623         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 624         if (!serio) {
 625                 psmouse_err(psmouse,
 626                             "not enough memory for pass-through port\n");
 627                 return;
 628         }
 629
 630         serio->id.type = SERIO_PS_PSTHRU;
 631         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 632         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 633         serio->write = synaptics_pt_write;
 634         serio->start = synaptics_pt_start;
 635         serio->stop = synaptics_pt_stop;
 636         serio->parent = psmouse->ps2dev.serio;
 637
 638         psmouse->pt_activate = synaptics_pt_activate;
 639
 640         psmouse_info(psmouse, "serio: %s port at %s\n",
 641                      serio->name, psmouse->phys);
 642         serio_register_port(serio);
 643 }
 644
 645 /*****************************************************************************
 646  *      Functions to interpret the absolute mode packets
 647  ****************************************************************************/
 648
 649 static void synaptics_parse_agm(const unsigned char buf[],
 650                                 struct synaptics_data *priv,
 651                                 struct synaptics_hw_state *hw)
 652 {
 653         struct synaptics_hw_state *agm = &priv->agm;
 654         int agm_packet_type;
 655
 656         agm_packet_type = (buf[5] & 0x30) >> 4;
 657         switch (agm_packet_type) {
 658         case 1:
 659                 /* Gesture packet: (x, y, z) half resolution */
 660                 agm->w = hw->w;
 661                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 662                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 663                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 664                 break;
 665
 666         case 2:
 667                 /* AGM-CONTACT packet: we are only interested in the count */
 668                 priv->agm_count = buf[1];
 669                 break;
 670
 671         default:
 672                 break;
 673         }
 674 }
 675
 676 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 677                                         struct synaptics_data *priv,
 678                                         struct synaptics_hw_state *hw)
 679 {
 680         unsigned int ext_bits =
 681                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 682         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 683
 684         hw->ext_buttons = buf[4] & ext_mask;
 685         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 686 }
 687
 688 static bool is_forcepad;
 689
 690 static int synaptics_parse_hw_state(const unsigned char buf[],
 691                                     struct synaptics_data *priv,
 692                                     struct synaptics_hw_state *hw)
 693 {
 694         memset(hw, 0, sizeof(struct synaptics_hw_state));
 695
 696         if (SYN_MODEL_NEWABS(priv->model_id)) {
 697                 hw->w = (((buf[0] & 0x30) >> 2) |
 698                          ((buf[0] & 0x04) >> 1) |
 699                          ((buf[3] & 0x04) >> 2));
 700
 701                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 702                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 703                     hw->w == 2) {
 704                         synaptics_parse_agm(buf, priv, hw);
 705                         return 1;
 706                 }
 707
 708                 hw->x = (((buf[3] & 0x10) << 8) |
 709                          ((buf[1] & 0x0f) << 8) |
 710                          buf[4]);
 711                 hw->y = (((buf[3] & 0x20) << 7) |
 712                          ((buf[1] & 0xf0) << 4) |
 713                          buf[5]);
 714                 hw->z = buf[2];
 715
 716                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 717                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 718
 719                 if (is_forcepad) {
 720                         /*
 721                          * ForcePads, like Clickpads, use middle button
 722                          * bits to report primary button clicks.
 723                          * Unfortunately they report primary button not
 724                          * only when user presses on the pad above certain
 725                          * threshold, but also when there are more than one
 726                          * finger on the touchpad, which interferes with
 727                          * out multi-finger gestures.
 728                          */
 729                         if (hw->z == 0) {
 730                                 /* No contacts */
 731                                 priv->press = priv->report_press = false;
 732                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 733                                 /*
 734                                  * Single-finger touch with pressure above
 735                                  * the threshold. If pressure stays long
 736                                  * enough, we'll start reporting primary
 737                                  * button. We rely on the device continuing
 738                                  * sending data even if finger does not
 739                                  * move.
 740                                  */
 741                                 if  (!priv->press) {
 742                                         priv->press_start = jiffies;
 743                                         priv->press = true;
 744                                 } else if (time_after(jiffies,
 745                                                 priv->press_start +
 746                                                         msecs_to_jiffies(50))) {
 747                                         priv->report_press = true;
 748                                 }
 749                         } else {
 750                                 priv->press = false;
 751                         }
 752
 753                         hw->left = priv->report_press;
 754
 755                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 756                         /*
 757                          * Clickpad's button is transmitted as middle button,
 758                          * however, since it is primary button, we will report
 759                          * it as BTN_LEFT.
 760                          */
 761                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 762
 763                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 764                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 765                         if (hw->w == 2)
 766                                 hw->scroll = (signed char)(buf[1]);
 767                 }
 768
 769                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 770                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 771                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 772                 }
 773
 774                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 775                     ((buf[0] ^ buf[3]) & 0x02)) {
 776                         synaptics_parse_ext_buttons(buf, priv, hw);
 777                 }
 778         } else {
 779                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 780                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 781
 782                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 783                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 784
 785                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 786                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 787         }
 788
 789         /*
 790          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 791          * is used by some firmware to indicate a finger at the edge of
 792          * the touchpad whose precise position cannot be determined, so
 793          * convert these values to the maximum axis value.
 794          */
 795         if (hw->x > X_MAX_POSITIVE)
 796                 hw->x -= 1 << ABS_POS_BITS;
 797         else if (hw->x == X_MAX_POSITIVE)
 798                 hw->x = XMAX;
 799
 800         if (hw->y > Y_MAX_POSITIVE)
 801                 hw->y -= 1 << ABS_POS_BITS;
 802         else if (hw->y == Y_MAX_POSITIVE)
 803                 hw->y = YMAX;
 804
 805         return 0;
 806 }
 807
 808 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 809                                           bool active, int x, int y)
 810 {
 811         input_mt_slot(dev, slot);
 812         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 813         if (active) {
 814                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 815                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 816         }
 817 }
 818
 819 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 820                                           const struct synaptics_hw_state *a,
 821                                           const struct synaptics_hw_state *b,
 822                                           int num_fingers)
 823 {
 824         if (num_fingers >= 2) {
 825                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 826                                               min(a->y, b->y));
 827                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 828                                               max(a->y, b->y));
 829         } else if (num_fingers == 1) {
 830                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 831                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 832         } else {
 833                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 834                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 835         }
 836 }
 837
 838 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 839                                          const struct synaptics_hw_state *hw)
 840 {
 841         struct input_dev *dev = psmouse->dev;
 842         struct synaptics_data *priv = psmouse->private;
 843         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 844         char buf[6] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 845         int i;
 846
 847         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 848                 return;
 849
 850         /* Bug in FW 8.1, buttons are reported only when ExtBit is 1 */
 851         if (SYN_ID_FULL(priv->identity) == 0x801 &&
 852             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 853                 return;
 854
 855         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10)) {
 856                 for (i = 0; i < ext_bits; i++) {
 857                         input_report_key(dev, BTN_0 + 2 * i,
 858                                 hw->ext_buttons & (1 << i));
 859                         input_report_key(dev, BTN_1 + 2 * i,
 860                                 hw->ext_buttons & (1 << (i + ext_bits)));
 861                 }
 862                 return;
 863         }
 864
 865         /*
 866          * This generation of touchpads has the trackstick buttons
 867          * physically wired to the touchpad. Re-route them through
 868          * the pass-through interface.
 869          */
 870         if (!priv->pt_port)
 871                 return;
 872
 873         /* The trackstick expects at most 3 buttons */
 874         priv->pt_buttons = SYN_CAP_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 875                            SYN_CAP_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 876                            SYN_CAP_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 877
 878         synaptics_pass_pt_packet(psmouse, priv->pt_port, buf);
 879 }
 880
 881 static void synaptics_report_buttons(struct psmouse *psmouse,
 882                                      const struct synaptics_hw_state *hw)
 883 {
 884         struct input_dev *dev = psmouse->dev;
 885         struct synaptics_data *priv = psmouse->private;
 886
 887         input_report_key(dev, BTN_LEFT, hw->left);
 888         input_report_key(dev, BTN_RIGHT, hw->right);
 889
 890         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 891                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 892
 893         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 894                 input_report_key(dev, BTN_FORWARD, hw->up);
 895                 input_report_key(dev, BTN_BACK, hw->down);
 896         }
 897
 898         synaptics_report_ext_buttons(psmouse, hw);
 899 }
 900
 901 static void synaptics_report_mt_data(struct psmouse *psmouse,
 902                                      const struct synaptics_hw_state *sgm,
 903                                      int num_fingers)
 904 {
 905         struct input_dev *dev = psmouse->dev;
 906         struct synaptics_data *priv = psmouse->private;
 907         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 908         struct input_mt_pos pos[2];
 909         int slot[2], nsemi, i;
 910
 911         nsemi = clamp_val(num_fingers, 0, 2);
 912
 913         for (i = 0; i < nsemi; i++) {
 914                 pos[i].x = hw[i]->x;
 915                 pos[i].y = synaptics_invert_y(hw[i]->y);
 916         }
 917
 918         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->x_res);
 919
 920         for (i = 0; i < nsemi; i++) {
 921                 input_mt_slot(dev, slot[i]);
 922                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 923                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 924                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 925                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 926         }
 927
 928         input_mt_drop_unused(dev);
 929
 930         /* Don't use active slot count to generate BTN_TOOL events. */
 931         input_mt_report_pointer_emulation(dev, false);
 932
 933         /* Send the number of fingers reported by touchpad itself. */
 934         input_mt_report_finger_count(dev, num_fingers);
 935
 936         synaptics_report_buttons(psmouse, sgm);
 937
 938         input_sync(dev);
 939 }
 940
 941 static void synaptics_image_sensor_process(struct psmouse *psmouse,
 942                                            struct synaptics_hw_state *sgm)
 943 {
 944         struct synaptics_data *priv = psmouse->private;
 945         int num_fingers;
 946
 947         /*
 948          * Update mt_state using the new finger count and current mt_state.
 949          */
 950         if (sgm->z == 0)
 951                 num_fingers = 0;
 952         else if (sgm->w >= 4)
 953                 num_fingers = 1;
 954         else if (sgm->w == 0)
 955                 num_fingers = 2;
 956         else if (sgm->w == 1)
 957                 num_fingers = priv->agm_count ? priv->agm_count : 3;
 958         else
 959                 num_fingers = 4;
 960
 961         /* Send resulting input events to user space */
 962         synaptics_report_mt_data(psmouse, sgm, num_fingers);
 963 }
 964
 965 /*
 966  *  called for each full received packet from the touchpad
 967  */
 968 static void synaptics_process_packet(struct psmouse *psmouse)
 969 {
 970         struct input_dev *dev = psmouse->dev;
 971         struct synaptics_data *priv = psmouse->private;
 972         struct synaptics_hw_state hw;
 973         int num_fingers;
 974         int finger_width;
 975
 976         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 977                 return;
 978
 979         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 980                 synaptics_image_sensor_process(psmouse, &hw);
 981                 return;
 982         }
 983
 984         if (hw.scroll) {
 985                 priv->scroll += hw.scroll;
 986
 987                 while (priv->scroll >= 4) {
 988                         input_report_key(dev, BTN_BACK, !hw.down);
 989                         input_sync(dev);
 990                         input_report_key(dev, BTN_BACK, hw.down);
 991                         input_sync(dev);
 992                         priv->scroll -= 4;
 993                 }
 994                 while (priv->scroll <= -4) {
 995                         input_report_key(dev, BTN_FORWARD, !hw.up);
 996                         input_sync(dev);
 997                         input_report_key(dev, BTN_FORWARD, hw.up);
 998                         input_sync(dev);
 999                         priv->scroll += 4;
1000                 }
1001                 return;
1002         }
1003
1004         if (hw.z > 0 && hw.x > 1) {
1005                 num_fingers = 1;
1006                 finger_width = 5;
1007                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1008                         switch (hw.w) {
1009                         case 0 ... 1:
1010                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1011                                         num_fingers = hw.w + 2;
1012                                 break;
1013                         case 2:
1014                                 if (SYN_MODEL_PEN(priv->model_id))
1015                                         ;   /* Nothing, treat a pen as a single finger */
1016                                 break;
1017                         case 4 ... 15:
1018                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1019                                         finger_width = hw.w;
1020                                 break;
1021                         }
1022                 }
1023         } else {
1024                 num_fingers = 0;
1025                 finger_width = 0;
1026         }
1027
1028         if (cr48_profile_sensor) {
1029                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1030                 return;
1031         }
1032
1033         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1034                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1035                                               num_fingers);
1036
1037         /* Post events
1038          * BTN_TOUCH has to be first as mousedev relies on it when doing
1039          * absolute -> relative conversion
1040          */
1041         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1042         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1043
1044         if (num_fingers > 0) {
1045                 input_report_abs(dev, ABS_X, hw.x);
1046                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1047         }
1048         input_report_abs(dev, ABS_PRESSURE, hw.z);
1049
1050         if (SYN_CAP_PALMDETECT(priv->capabilities))
1051                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1052
1053         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1054         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1055                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1056                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1057         }
1058
1059         synaptics_report_buttons(psmouse, &hw);
1060
1061         input_sync(dev);
1062 }
1063
1064 static int synaptics_validate_byte(struct psmouse *psmouse,
1065                                    int idx, unsigned char pkt_type)
1066 {
1067         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1068         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1069         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1070         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1071         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1072         const char *packet = psmouse->packet;
1073
1074         if (idx < 0 || idx > 4)
1075                 return 0;
1076
1077         switch (pkt_type) {
1078
1079         case SYN_NEWABS:
1080         case SYN_NEWABS_RELAXED:
1081                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1082
1083         case SYN_NEWABS_STRICT:
1084                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1085
1086         case SYN_OLDABS:
1087                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1088
1089         default:
1090                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1091                 return 0;
1092         }
1093 }
1094
1095 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1096 {
1097         int i;
1098
1099         for (i = 0; i < 5; i++)
1100                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1101                         psmouse_info(psmouse, "using relaxed packet validation\n");
1102                         return SYN_NEWABS_RELAXED;
1103                 }
1104
1105         return SYN_NEWABS_STRICT;
1106 }
1107
1108 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1109 {
1110         struct synaptics_data *priv = psmouse->private;
1111
1112         if (psmouse->pktcnt >= 6) { /* Full packet received */
1113                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1114                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1115
1116                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1117                     synaptics_is_pt_packet(psmouse->packet)) {
1118                         if (priv->pt_port)
1119                                 synaptics_pass_pt_packet(psmouse, priv->pt_port,
1120                                                          psmouse->packet);
1121                 } else
1122                         synaptics_process_packet(psmouse);
1123
1124                 return PSMOUSE_FULL_PACKET;
1125         }
1126
1127         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1128                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1129 }
1130
1131 /*****************************************************************************
1132  *      Driver initialization/cleanup functions
1133  ****************************************************************************/
1134 static void set_abs_position_params(struct input_dev *dev,
1135                                     struct synaptics_data *priv, int x_code,
1136                                     int y_code)
1137 {
1138         int x_min = priv->x_min ?: XMIN_NOMINAL;
1139         int x_max = priv->x_max ?: XMAX_NOMINAL;
1140         int y_min = priv->y_min ?: YMIN_NOMINAL;
1141         int y_max = priv->y_max ?: YMAX_NOMINAL;
1142         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1143                         SYN_REDUCED_FILTER_FUZZ : 0;
1144
1145         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1146         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1147         input_abs_set_res(dev, x_code, priv->x_res);
1148         input_abs_set_res(dev, y_code, priv->y_res);
1149 }
1150
1151 static void set_input_params(struct psmouse *psmouse,
1152                              struct synaptics_data *priv)
1153 {
1154         struct input_dev *dev = psmouse->dev;
1155         int i;
1156
1157         /* Things that apply to both modes */
1158         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1159         __set_bit(EV_KEY, dev->evbit);
1160         __set_bit(BTN_LEFT, dev->keybit);
1161         __set_bit(BTN_RIGHT, dev->keybit);
1162
1163         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1164                 __set_bit(BTN_MIDDLE, dev->keybit);
1165
1166         if (!priv->absolute_mode) {
1167                 /* Relative mode */
1168                 __set_bit(EV_REL, dev->evbit);
1169                 __set_bit(REL_X, dev->relbit);
1170                 __set_bit(REL_Y, dev->relbit);
1171                 return;
1172         }
1173
1174         /* Absolute mode */
1175         __set_bit(EV_ABS, dev->evbit);
1176         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1177         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1178
1179         if (cr48_profile_sensor)
1180                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1181
1182         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1183                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1184                                         ABS_MT_POSITION_Y);
1185                 /* Image sensors can report per-contact pressure */
1186                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1187                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1188
1189                 /* Image sensors can signal 4 and 5 finger clicks */
1190                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1191                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1192         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1193                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1194                                         ABS_MT_POSITION_Y);
1195                 /*
1196                  * Profile sensor in CR-48 tracks contacts reasonably well,
1197                  * other non-image sensors with AGM use semi-mt.
1198                  */
1199                 input_mt_init_slots(dev, 2,
1200                                     INPUT_MT_POINTER |
1201                                     (cr48_profile_sensor ?
1202                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1203         }
1204
1205         if (SYN_CAP_PALMDETECT(priv->capabilities))
1206                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1207
1208         __set_bit(BTN_TOUCH, dev->keybit);
1209         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1210
1211         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1212                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1213                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1214         }
1215
1216         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1217             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1218                 __set_bit(BTN_FORWARD, dev->keybit);
1219                 __set_bit(BTN_BACK, dev->keybit);
1220         }
1221
1222         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1223                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1224                         __set_bit(BTN_0 + i, dev->keybit);
1225
1226         __clear_bit(EV_REL, dev->evbit);
1227         __clear_bit(REL_X, dev->relbit);
1228         __clear_bit(REL_Y, dev->relbit);
1229
1230         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1231                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1232                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1233                     !SYN_CAP_EXT_BUTTONS_STICK(priv->ext_cap_10))
1234                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1235                 /* Clickpads report only left button */
1236                 __clear_bit(BTN_RIGHT, dev->keybit);
1237                 __clear_bit(BTN_MIDDLE, dev->keybit);
1238         }
1239 }
1240
1241 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1242                                               void *data, char *buf)
1243 {
1244         struct synaptics_data *priv = psmouse->private;
1245
1246         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1247 }
1248
1249 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1250                                              void *data, const char *buf,
1251                                              size_t len)
1252 {
1253         struct synaptics_data *priv = psmouse->private;
1254         unsigned int value;
1255         int err;
1256
1257         err = kstrtouint(buf, 10, &value);
1258         if (err)
1259                 return err;
1260
1261         if (value > 1)
1262                 return -EINVAL;
1263
1264         if (value == priv->disable_gesture)
1265                 return len;
1266
1267         priv->disable_gesture = value;
1268         if (value)
1269                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1270         else
1271                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1272
1273         if (synaptics_mode_cmd(psmouse, priv->mode))
1274                 return -EIO;
1275
1276         return len;
1277 }
1278
1279 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1280                     synaptics_show_disable_gesture,
1281                     synaptics_set_disable_gesture);
1282
1283 static void synaptics_disconnect(struct psmouse *psmouse)
1284 {
1285         struct synaptics_data *priv = psmouse->private;
1286
1287         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1288                 device_remove_file(&psmouse->ps2dev.serio->dev,
1289                                    &psmouse_attr_disable_gesture.dattr);
1290
1291         synaptics_reset(psmouse);
1292         kfree(priv);
1293         psmouse->private = NULL;
1294 }
1295
1296 static int synaptics_reconnect(struct psmouse *psmouse)
1297 {
1298         struct synaptics_data *priv = psmouse->private;
1299         struct synaptics_data old_priv = *priv;
1300         unsigned char param[2];
1301         int retry = 0;
1302         int error;
1303
1304         do {
1305                 psmouse_reset(psmouse);
1306                 if (retry) {
1307                         /*
1308                          * On some boxes, right after resuming, the touchpad
1309                          * needs some time to finish initializing (I assume
1310                          * it needs time to calibrate) and start responding
1311                          * to Synaptics-specific queries, so let's wait a
1312                          * bit.
1313                          */
1314                         ssleep(1);
1315                 }
1316                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1317                 error = synaptics_detect(psmouse, 0);
1318         } while (error && ++retry < 3);
1319
1320         if (error)
1321                 return -1;
1322
1323         if (retry > 1)
1324                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1325
1326         if (synaptics_query_hardware(psmouse)) {
1327                 psmouse_err(psmouse, "Unable to query device.\n");
1328                 return -1;
1329         }
1330
1331         if (synaptics_set_mode(psmouse)) {
1332                 psmouse_err(psmouse, "Unable to initialize device.\n");
1333                 return -1;
1334         }
1335
1336         if (old_priv.identity != priv->identity ||
1337             old_priv.model_id != priv->model_id ||
1338             old_priv.capabilities != priv->capabilities ||
1339             old_priv.ext_cap != priv->ext_cap) {
1340                 psmouse_err(psmouse,
1341                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1342                             old_priv.identity, priv->identity,
1343                             old_priv.model_id, priv->model_id,
1344                             old_priv.capabilities, priv->capabilities,
1345                             old_priv.ext_cap, priv->ext_cap);
1346                 return -1;
1347         }
1348
1349         return 0;
1350 }
1351
1352 static bool impaired_toshiba_kbc;
1353
1354 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1355 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1356         {
1357                 /* Toshiba Satellite */
1358                 .matches = {
1359                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1360                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1361                 },
1362         },
1363         {
1364                 /* Toshiba Dynabook */
1365                 .matches = {
1366                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1367                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1368                 },
1369         },
1370         {
1371                 /* Toshiba Portege M300 */
1372                 .matches = {
1373                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1374                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1375                 },
1376
1377         },
1378         {
1379                 /* Toshiba Portege M300 */
1380                 .matches = {
1381                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1382                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1383                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1384                 },
1385
1386         },
1387 #endif
1388         { }
1389 };
1390
1391 static bool broken_olpc_ec;
1392
1393 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1394 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1395         {
1396                 /* OLPC XO-1 or XO-1.5 */
1397                 .matches = {
1398                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1399                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1400                 },
1401         },
1402 #endif
1403         { }
1404 };
1405
1406 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1407 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1408         {
1409                 /* Cr-48 Chromebook (Codename Mario) */
1410                 .matches = {
1411                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1412                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1413                 },
1414         },
1415 #endif
1416         { }
1417 };
1418
1419 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1420 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1421         {
1422                 .matches = {
1423                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1424                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1425                 },
1426         },
1427 #endif
1428         { }
1429 };
1430
1431 void __init synaptics_module_init(void)
1432 {
1433         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1434         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1435         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1436
1437         /*
1438          * Unfortunately ForcePad capability is not exported over PS/2,
1439          * so we have to resort to checking DMI.
1440          */
1441         is_forcepad = dmi_check_system(forcepad_dmi_table);
1442 }
1443
1444 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1445 {
1446         struct synaptics_data *priv;
1447         int err = -1;
1448
1449         /*
1450          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1451          * packet spew overloads the EC such that key presses on the keyboard
1452          * are missed.  Given that, don't even attempt to use Absolute mode.
1453          * Relative mode seems to work just fine.
1454          */
1455         if (absolute_mode && broken_olpc_ec) {
1456                 psmouse_info(psmouse,
1457                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1458                 return -ENODEV;
1459         }
1460
1461         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1462         if (!priv)
1463                 return -ENOMEM;
1464
1465         psmouse_reset(psmouse);
1466
1467         if (synaptics_query_hardware(psmouse)) {
1468                 psmouse_err(psmouse, "Unable to query device.\n");
1469                 goto init_fail;
1470         }
1471
1472         priv->absolute_mode = absolute_mode;
1473         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1474                 priv->disable_gesture = true;
1475
1476         if (synaptics_set_mode(psmouse)) {
1477                 psmouse_err(psmouse, "Unable to initialize device.\n");
1478                 goto init_fail;
1479         }
1480
1481         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1482
1483         psmouse_info(psmouse,
1484                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1485                      SYN_ID_MODEL(priv->identity),
1486                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1487                      priv->model_id,
1488                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1489                      priv->board_id, priv->firmware_id);
1490
1491         set_input_params(psmouse, priv);
1492
1493         /*
1494          * Encode touchpad model so that it can be used to set
1495          * input device->id.version and be visible to userspace.
1496          * Because version is __u16 we have to drop something.
1497          * Hardware info bits seem to be good candidates as they
1498          * are documented to be for Synaptics corp. internal use.
1499          */
1500         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1501                           (priv->model_id & 0x000000ff);
1502
1503         if (absolute_mode) {
1504                 psmouse->protocol_handler = synaptics_process_byte;
1505                 psmouse->pktsize = 6;
1506         } else {
1507                 /* Relative mode follows standard PS/2 mouse protocol */
1508                 psmouse->protocol_handler = psmouse_process_byte;
1509                 psmouse->pktsize = 3;
1510         }
1511
1512         psmouse->set_rate = synaptics_set_rate;
1513         psmouse->disconnect = synaptics_disconnect;
1514         psmouse->reconnect = synaptics_reconnect;
1515         psmouse->cleanup = synaptics_reset;
1516         /* Synaptics can usually stay in sync without extra help */
1517         psmouse->resync_time = 0;
1518
1519         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1520                 synaptics_pt_create(psmouse);
1521
1522         /*
1523          * Toshiba's KBC seems to have trouble handling data from
1524          * Synaptics at full rate.  Switch to a lower rate (roughly
1525          * the same rate as a standard PS/2 mouse).
1526          */
1527         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1528                 psmouse_info(psmouse,
1529                              "Toshiba %s detected, limiting rate to 40pps.\n",
1530                              dmi_get_system_info(DMI_PRODUCT_NAME));
1531                 psmouse->rate = 40;
1532         }
1533
1534         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1535                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1536                                          &psmouse_attr_disable_gesture.dattr);
1537                 if (err) {
1538                         psmouse_err(psmouse,
1539                                     "Failed to create disable_gesture attribute (%d)",
1540                                     err);
1541                         goto init_fail;
1542                 }
1543         }
1544
1545         return 0;
1546
1547  init_fail:
1548         kfree(priv);
1549         return err;
1550 }
1551
1552 int synaptics_init(struct psmouse *psmouse)
1553 {
1554         return __synaptics_init(psmouse, true);
1555 }
1556
1557 int synaptics_init_relative(struct psmouse *psmouse)
1558 {
1559         return __synaptics_init(psmouse, false);
1560 }
1561
1562 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1563
1564 void __init synaptics_module_init(void)
1565 {
1566 }
1567
1568 int synaptics_init(struct psmouse *psmouse)
1569 {
1570         return -ENOSYS;
1571 }
1572
1573 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */