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  * Synaptics touchpads report the y coordinate from bottom to top, which is
  72  * opposite from what userspace expects.
  73  * This function is used to invert y before reporting.
  74  */
  75 static int synaptics_invert_y(int y)
  76 {
  77         return YMAX_NOMINAL + YMIN_NOMINAL - y;
  78 }
  79
  80
  81 /*****************************************************************************
  82  *      Stuff we need even when we do not want native Synaptics support
  83  ****************************************************************************/
  84
  85 /*
  86  * Set the synaptics touchpad mode byte by special commands
  87  */
  88 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  89 {
  90         unsigned char param[1];
  91
  92         if (psmouse_sliced_command(psmouse, mode))
  93                 return -1;
  94         param[0] = SYN_PS_SET_MODE2;
  95         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  96                 return -1;
  97         return 0;
  98 }
  99
 100 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
 101 {
 102         struct ps2dev *ps2dev = &psmouse->ps2dev;
 103         unsigned char param[4];
 104
 105         param[0] = 0;
 106
 107         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 108         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 109         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 110         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 111         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 112
 113         if (param[1] != 0x47)
 114                 return -ENODEV;
 115
 116         if (set_properties) {
 117                 psmouse->vendor = "Synaptics";
 118                 psmouse->name = "TouchPad";
 119         }
 120
 121         return 0;
 122 }
 123
 124 void synaptics_reset(struct psmouse *psmouse)
 125 {
 126         /* reset touchpad back to relative mode, gestures enabled */
 127         synaptics_mode_cmd(psmouse, 0);
 128 }
 129
 130 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 131
 132 /*****************************************************************************
 133  *      Synaptics communications functions
 134  ****************************************************************************/
 135
 136 /*
 137  * Send a command to the synpatics touchpad by special commands
 138  */
 139 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 140 {
 141         if (psmouse_sliced_command(psmouse, c))
 142                 return -1;
 143         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 144                 return -1;
 145         return 0;
 146 }
 147
 148 /*
 149  * Read the model-id bytes from the touchpad
 150  * see also SYN_MODEL_* macros
 151  */
 152 static int synaptics_model_id(struct psmouse *psmouse)
 153 {
 154         struct synaptics_data *priv = psmouse->private;
 155         unsigned char mi[3];
 156
 157         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 158                 return -1;
 159         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 160         return 0;
 161 }
 162
 163 /*
 164  * Read the capability-bits from the touchpad
 165  * see also the SYN_CAP_* macros
 166  */
 167 static int synaptics_capability(struct psmouse *psmouse)
 168 {
 169         struct synaptics_data *priv = psmouse->private;
 170         unsigned char cap[3];
 171
 172         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 173                 return -1;
 174         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 175         priv->ext_cap = priv->ext_cap_0c = 0;
 176
 177         /*
 178          * Older firmwares had submodel ID fixed to 0x47
 179          */
 180         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 181             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 182                 return -1;
 183         }
 184
 185         /*
 186          * Unless capExtended is set the rest of the flags should be ignored
 187          */
 188         if (!SYN_CAP_EXTENDED(priv->capabilities))
 189                 priv->capabilities = 0;
 190
 191         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 192                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 193                         psmouse_warn(psmouse,
 194                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 195                 } else {
 196                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 197
 198                         /*
 199                          * if nExtBtn is greater than 8 it should be considered
 200                          * invalid and treated as 0
 201                          */
 202                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 203                                 priv->ext_cap &= 0xff0fff;
 204                 }
 205         }
 206
 207         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 208                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 209                         psmouse_warn(psmouse,
 210                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 211                 } else {
 212                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 213                 }
 214         }
 215
 216         return 0;
 217 }
 218
 219 /*
 220  * Identify Touchpad
 221  * See also the SYN_ID_* macros
 222  */
 223 static int synaptics_identify(struct psmouse *psmouse)
 224 {
 225         struct synaptics_data *priv = psmouse->private;
 226         unsigned char id[3];
 227
 228         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 229                 return -1;
 230         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 231         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 232                 return 0;
 233         return -1;
 234 }
 235
 236 /*
 237  * Read touchpad resolution and maximum reported coordinates
 238  * Resolution is left zero if touchpad does not support the query
 239  */
 240
 241 static const int *quirk_min_max;
 242
 243 static int synaptics_resolution(struct psmouse *psmouse)
 244 {
 245         struct synaptics_data *priv = psmouse->private;
 246         unsigned char resp[3];
 247
 248         if (SYN_ID_MAJOR(priv->identity) < 4)
 249                 return 0;
 250
 251         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 252                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 253                         priv->x_res = resp[0]; /* x resolution in units/mm */
 254                         priv->y_res = resp[2]; /* y resolution in units/mm */
 255                 }
 256         }
 257
 258         if (quirk_min_max) {
 259                 priv->x_min = quirk_min_max[0];
 260                 priv->x_max = quirk_min_max[1];
 261                 priv->y_min = quirk_min_max[2];
 262                 priv->y_max = quirk_min_max[3];
 263                 return 0;
 264         }
 265
 266         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 267             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 268                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 269                         psmouse_warn(psmouse,
 270                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 271                 } else {
 272                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 273                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 274                 }
 275         }
 276
 277         if (SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c) &&
 278             (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 ||
 279              /*
 280               * Firmware v8.1 does not report proper number of extended
 281               * capabilities, but has been proven to report correct min
 282               * coordinates.
 283               */
 284              SYN_ID_FULL(priv->identity) == 0x801)) {
 285                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 286                         psmouse_warn(psmouse,
 287                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 288                 } else {
 289                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 290                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 291                 }
 292         }
 293
 294         return 0;
 295 }
 296
 297 static int synaptics_query_hardware(struct psmouse *psmouse)
 298 {
 299         if (synaptics_identify(psmouse))
 300                 return -1;
 301         if (synaptics_model_id(psmouse))
 302                 return -1;
 303         if (synaptics_capability(psmouse))
 304                 return -1;
 305         if (synaptics_resolution(psmouse))
 306                 return -1;
 307
 308         return 0;
 309 }
 310
 311 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 312 {
 313         struct synaptics_data *priv = psmouse->private;
 314
 315         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 316         if (SYN_ID_MAJOR(priv->identity) >= 4)
 317                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 318         if (SYN_CAP_EXTENDED(priv->capabilities))
 319                 priv->mode |= SYN_BIT_W_MODE;
 320
 321         if (synaptics_mode_cmd(psmouse, priv->mode))
 322                 return -1;
 323
 324         return 0;
 325 }
 326
 327 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 328 {
 329         struct synaptics_data *priv = psmouse->private;
 330
 331         if (rate >= 80) {
 332                 priv->mode |= SYN_BIT_HIGH_RATE;
 333                 psmouse->rate = 80;
 334         } else {
 335                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 336                 psmouse->rate = 40;
 337         }
 338
 339         synaptics_mode_cmd(psmouse, priv->mode);
 340 }
 341
 342 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 343 {
 344         static unsigned char param = 0xc8;
 345         struct synaptics_data *priv = psmouse->private;
 346
 347         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 348                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 349                 return 0;
 350
 351         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 352                 return -1;
 353         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 354                 return -1;
 355
 356         /* Advanced gesture mode also sends multi finger data */
 357         priv->capabilities |= BIT(1);
 358
 359         return 0;
 360 }
 361
 362 /*****************************************************************************
 363  *      Synaptics pass-through PS/2 port support
 364  ****************************************************************************/
 365 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 366 {
 367         struct psmouse *parent = serio_get_drvdata(serio->parent);
 368         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 369
 370         if (psmouse_sliced_command(parent, c))
 371                 return -1;
 372         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 373                 return -1;
 374         return 0;
 375 }
 376
 377 static int synaptics_pt_start(struct serio *serio)
 378 {
 379         struct psmouse *parent = serio_get_drvdata(serio->parent);
 380         struct synaptics_data *priv = parent->private;
 381
 382         serio_pause_rx(parent->ps2dev.serio);
 383         priv->pt_port = serio;
 384         serio_continue_rx(parent->ps2dev.serio);
 385
 386         return 0;
 387 }
 388
 389 static void synaptics_pt_stop(struct serio *serio)
 390 {
 391         struct psmouse *parent = serio_get_drvdata(serio->parent);
 392         struct synaptics_data *priv = parent->private;
 393
 394         serio_pause_rx(parent->ps2dev.serio);
 395         priv->pt_port = NULL;
 396         serio_continue_rx(parent->ps2dev.serio);
 397 }
 398
 399 static int synaptics_is_pt_packet(unsigned char *buf)
 400 {
 401         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 402 }
 403
 404 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 405 {
 406         struct psmouse *child = serio_get_drvdata(ptport);
 407
 408         if (child && child->state == PSMOUSE_ACTIVATED) {
 409                 serio_interrupt(ptport, packet[1], 0);
 410                 serio_interrupt(ptport, packet[4], 0);
 411                 serio_interrupt(ptport, packet[5], 0);
 412                 if (child->pktsize == 4)
 413                         serio_interrupt(ptport, packet[2], 0);
 414         } else
 415                 serio_interrupt(ptport, packet[1], 0);
 416 }
 417
 418 static void synaptics_pt_activate(struct psmouse *psmouse)
 419 {
 420         struct synaptics_data *priv = psmouse->private;
 421         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 422
 423         /* adjust the touchpad to child's choice of protocol */
 424         if (child) {
 425                 if (child->pktsize == 4)
 426                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 427                 else
 428                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 429
 430                 if (synaptics_mode_cmd(psmouse, priv->mode))
 431                         psmouse_warn(psmouse,
 432                                      "failed to switch guest protocol\n");
 433         }
 434 }
 435
 436 static void synaptics_pt_create(struct psmouse *psmouse)
 437 {
 438         struct serio *serio;
 439
 440         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 441         if (!serio) {
 442                 psmouse_err(psmouse,
 443                             "not enough memory for pass-through port\n");
 444                 return;
 445         }
 446
 447         serio->id.type = SERIO_PS_PSTHRU;
 448         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 449         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 450         serio->write = synaptics_pt_write;
 451         serio->start = synaptics_pt_start;
 452         serio->stop = synaptics_pt_stop;
 453         serio->parent = psmouse->ps2dev.serio;
 454
 455         psmouse->pt_activate = synaptics_pt_activate;
 456
 457         psmouse_info(psmouse, "serio: %s port at %s\n",
 458                      serio->name, psmouse->phys);
 459         serio_register_port(serio);
 460 }
 461
 462 /*****************************************************************************
 463  *      Functions to interpret the absolute mode packets
 464  ****************************************************************************/
 465
 466 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 467                                    int sgm, int agm)
 468 {
 469         state->count = count;
 470         state->sgm = sgm;
 471         state->agm = agm;
 472 }
 473
 474 static void synaptics_parse_agm(const unsigned char buf[],
 475                                 struct synaptics_data *priv,
 476                                 struct synaptics_hw_state *hw)
 477 {
 478         struct synaptics_hw_state *agm = &priv->agm;
 479         int agm_packet_type;
 480
 481         agm_packet_type = (buf[5] & 0x30) >> 4;
 482         switch (agm_packet_type) {
 483         case 1:
 484                 /* Gesture packet: (x, y, z) half resolution */
 485                 agm->w = hw->w;
 486                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 487                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 488                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 489                 break;
 490
 491         case 2:
 492                 /* AGM-CONTACT packet: (count, sgm, agm) */
 493                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 494                 break;
 495
 496         default:
 497                 break;
 498         }
 499
 500         /* Record that at least one AGM has been received since last SGM */
 501         priv->agm_pending = true;
 502 }
 503
 504 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 505                                         struct synaptics_data *priv,
 506                                         struct synaptics_hw_state *hw)
 507 {
 508         unsigned int ext_bits =
 509                 (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 510         unsigned int ext_mask = (1U << ext_bits) - 1;
 511
 512         hw->ext_buttons = buf[4] & ext_mask;
 513         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 514 }
 515
 516 static bool is_forcepad;
 517
 518 static int synaptics_parse_hw_state(const unsigned char buf[],
 519                                     struct synaptics_data *priv,
 520                                     struct synaptics_hw_state *hw)
 521 {
 522         memset(hw, 0, sizeof(struct synaptics_hw_state));
 523
 524         if (SYN_MODEL_NEWABS(priv->model_id)) {
 525                 hw->w = (((buf[0] & 0x30) >> 2) |
 526                          ((buf[0] & 0x04) >> 1) |
 527                          ((buf[3] & 0x04) >> 2));
 528
 529                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 530                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 531                     hw->w == 2) {
 532                         synaptics_parse_agm(buf, priv, hw);
 533                         return 1;
 534                 }
 535
 536                 hw->x = (((buf[3] & 0x10) << 8) |
 537                          ((buf[1] & 0x0f) << 8) |
 538                          buf[4]);
 539                 hw->y = (((buf[3] & 0x20) << 7) |
 540                          ((buf[1] & 0xf0) << 4) |
 541                          buf[5]);
 542                 hw->z = buf[2];
 543
 544                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 545                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 546
 547                 if (is_forcepad) {
 548                         /*
 549                          * ForcePads, like Clickpads, use middle button
 550                          * bits to report primary button clicks.
 551                          * Unfortunately they report primary button not
 552                          * only when user presses on the pad above certain
 553                          * threshold, but also when there are more than one
 554                          * finger on the touchpad, which interferes with
 555                          * out multi-finger gestures.
 556                          */
 557                         if (hw->z == 0) {
 558                                 /* No contacts */
 559                                 priv->press = priv->report_press = false;
 560                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 561                                 /*
 562                                  * Single-finger touch with pressure above
 563                                  * the threshold. If pressure stays long
 564                                  * enough, we'll start reporting primary
 565                                  * button. We rely on the device continuing
 566                                  * sending data even if finger does not
 567                                  * move.
 568                                  */
 569                                 if  (!priv->press) {
 570                                         priv->press_start = jiffies;
 571                                         priv->press = true;
 572                                 } else if (time_after(jiffies,
 573                                                 priv->press_start +
 574                                                         msecs_to_jiffies(50))) {
 575                                         priv->report_press = true;
 576                                 }
 577                         } else {
 578                                 priv->press = false;
 579                         }
 580
 581                         hw->left = priv->report_press;
 582
 583                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 584                         /*
 585                          * Clickpad's button is transmitted as middle button,
 586                          * however, since it is primary button, we will report
 587                          * it as BTN_LEFT.
 588                          */
 589                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 590
 591                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 592                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 593                         if (hw->w == 2)
 594                                 hw->scroll = (signed char)(buf[1]);
 595                 }
 596
 597                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 598                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 599                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 600                 }
 601
 602                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 0 &&
 603                     ((buf[0] ^ buf[3]) & 0x02)) {
 604                         synaptics_parse_ext_buttons(buf, priv, hw);
 605                 }
 606         } else {
 607                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 608                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 609
 610                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 611                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 612
 613                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 614                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 615         }
 616
 617         /*
 618          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 619          * is used by some firmware to indicate a finger at the edge of
 620          * the touchpad whose precise position cannot be determined, so
 621          * convert these values to the maximum axis value.
 622          */
 623         if (hw->x > X_MAX_POSITIVE)
 624                 hw->x -= 1 << ABS_POS_BITS;
 625         else if (hw->x == X_MAX_POSITIVE)
 626                 hw->x = XMAX;
 627
 628         if (hw->y > Y_MAX_POSITIVE)
 629                 hw->y -= 1 << ABS_POS_BITS;
 630         else if (hw->y == Y_MAX_POSITIVE)
 631                 hw->y = YMAX;
 632
 633         return 0;
 634 }
 635
 636 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 637                                           bool active, int x, int y)
 638 {
 639         input_mt_slot(dev, slot);
 640         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 641         if (active) {
 642                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 643                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 644         }
 645 }
 646
 647 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 648                                           const struct synaptics_hw_state *a,
 649                                           const struct synaptics_hw_state *b,
 650                                           int num_fingers)
 651 {
 652         if (num_fingers >= 2) {
 653                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 654                                               min(a->y, b->y));
 655                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 656                                               max(a->y, b->y));
 657         } else if (num_fingers == 1) {
 658                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 659                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 660         } else {
 661                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 662                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 663         }
 664 }
 665
 666 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 667                                          const struct synaptics_hw_state *hw)
 668 {
 669         struct input_dev *dev = psmouse->dev;
 670         struct synaptics_data *priv = psmouse->private;
 671         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) + 1) >> 1;
 672         int i;
 673
 674         if (!SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
 675                 return;
 676
 677         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 678         if ((SYN_ID_FULL(priv->identity) == 0x801 ||
 679              SYN_ID_FULL(priv->identity) == 0x802) &&
 680             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 681                 return;
 682
 683         for (i = 0; i < ext_bits; i++) {
 684                 input_report_key(dev, BTN_0 + 2 * i,
 685                         hw->ext_buttons & (1 << i));
 686                 input_report_key(dev, BTN_1 + 2 * i,
 687                         hw->ext_buttons & (1 << (i + ext_bits)));
 688         }
 689 }
 690
 691 static void synaptics_report_buttons(struct psmouse *psmouse,
 692                                      const struct synaptics_hw_state *hw)
 693 {
 694         struct input_dev *dev = psmouse->dev;
 695         struct synaptics_data *priv = psmouse->private;
 696
 697         input_report_key(dev, BTN_LEFT, hw->left);
 698         input_report_key(dev, BTN_RIGHT, hw->right);
 699
 700         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 701                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 702
 703         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 704                 input_report_key(dev, BTN_FORWARD, hw->up);
 705                 input_report_key(dev, BTN_BACK, hw->down);
 706         }
 707
 708         synaptics_report_ext_buttons(psmouse, hw);
 709 }
 710
 711 static void synaptics_report_slot(struct input_dev *dev, int slot,
 712                                   const struct synaptics_hw_state *hw)
 713 {
 714         input_mt_slot(dev, slot);
 715         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 716         if (!hw)
 717                 return;
 718
 719         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 720         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 721         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 722 }
 723
 724 static void synaptics_report_mt_data(struct psmouse *psmouse,
 725                                      struct synaptics_mt_state *mt_state,
 726                                      const struct synaptics_hw_state *sgm)
 727 {
 728         struct input_dev *dev = psmouse->dev;
 729         struct synaptics_data *priv = psmouse->private;
 730         struct synaptics_hw_state *agm = &priv->agm;
 731         struct synaptics_mt_state *old = &priv->mt_state;
 732
 733         switch (mt_state->count) {
 734         case 0:
 735                 synaptics_report_slot(dev, 0, NULL);
 736                 synaptics_report_slot(dev, 1, NULL);
 737                 break;
 738         case 1:
 739                 if (mt_state->sgm == -1) {
 740                         synaptics_report_slot(dev, 0, NULL);
 741                         synaptics_report_slot(dev, 1, NULL);
 742                 } else if (mt_state->sgm == 0) {
 743                         synaptics_report_slot(dev, 0, sgm);
 744                         synaptics_report_slot(dev, 1, NULL);
 745                 } else {
 746                         synaptics_report_slot(dev, 0, NULL);
 747                         synaptics_report_slot(dev, 1, sgm);
 748                 }
 749                 break;
 750         default:
 751                 /*
 752                  * If the finger slot contained in SGM is valid, and either
 753                  * hasn't changed, or is new, then report SGM in MTB slot 0.
 754                  * Otherwise, empty MTB slot 0.
 755                  */
 756                 if (mt_state->sgm != -1 &&
 757                     (mt_state->sgm == old->sgm || old->sgm == -1))
 758                         synaptics_report_slot(dev, 0, sgm);
 759                 else
 760                         synaptics_report_slot(dev, 0, NULL);
 761
 762                 /*
 763                  * If the finger slot contained in AGM is valid, and either
 764                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 765                  * Otherwise, empty MTB slot 1.
 766                  */
 767                 if (mt_state->agm != -1 &&
 768                     (mt_state->agm == old->agm || old->agm == -1))
 769                         synaptics_report_slot(dev, 1, agm);
 770                 else
 771                         synaptics_report_slot(dev, 1, NULL);
 772                 break;
 773         }
 774
 775         /* Don't use active slot count to generate BTN_TOOL events. */
 776         input_mt_report_pointer_emulation(dev, false);
 777
 778         /* Send the number of fingers reported by touchpad itself. */
 779         input_mt_report_finger_count(dev, mt_state->count);
 780
 781         synaptics_report_buttons(psmouse, sgm);
 782
 783         input_sync(dev);
 784 }
 785
 786 /* Handle case where mt_state->count = 0 */
 787 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
 788                                       struct synaptics_mt_state *mt_state)
 789 {
 790         synaptics_mt_state_set(mt_state, 0, -1, -1);
 791         priv->mt_state_lost = false;
 792 }
 793
 794 /* Handle case where mt_state->count = 1 */
 795 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
 796                                       struct synaptics_mt_state *mt_state)
 797 {
 798         struct synaptics_hw_state *agm = &priv->agm;
 799         struct synaptics_mt_state *old = &priv->mt_state;
 800
 801         /*
 802          * If the last AGM was (0,0,0), and there is only one finger left,
 803          * then we absolutely know that SGM contains slot 0, and all other
 804          * fingers have been removed.
 805          */
 806         if (priv->agm_pending && agm->z == 0) {
 807                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 808                 priv->mt_state_lost = false;
 809                 return;
 810         }
 811
 812         switch (old->count) {
 813         case 0:
 814                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 815                 break;
 816         case 1:
 817                 /*
 818                  * If mt_state_lost, then the previous transition was 3->1,
 819                  * and SGM now contains either slot 0 or 1, but we don't know
 820                  * which.  So, we just assume that the SGM now contains slot 1.
 821                  *
 822                  * If pending AGM and either:
 823                  *   (a) the previous SGM slot contains slot 0, or
 824                  *   (b) there was no SGM slot
 825                  * then, the SGM now contains slot 1
 826                  *
 827                  * Case (a) happens with very rapid "drum roll" gestures, where
 828                  * slot 0 finger is lifted and a new slot 1 finger touches
 829                  * within one reporting interval.
 830                  *
 831                  * Case (b) happens if initially two or more fingers tap
 832                  * briefly, and all but one lift before the end of the first
 833                  * reporting interval.
 834                  *
 835                  * (In both these cases, slot 0 will becomes empty, so SGM
 836                  * contains slot 1 with the new finger)
 837                  *
 838                  * Else, if there was no previous SGM, it now contains slot 0.
 839                  *
 840                  * Otherwise, SGM still contains the same slot.
 841                  */
 842                 if (priv->mt_state_lost ||
 843                     (priv->agm_pending && old->sgm <= 0))
 844                         synaptics_mt_state_set(mt_state, 1, 1, -1);
 845                 else if (old->sgm == -1)
 846                         synaptics_mt_state_set(mt_state, 1, 0, -1);
 847                 break;
 848         case 2:
 849                 /*
 850                  * If mt_state_lost, we don't know which finger SGM contains.
 851                  *
 852                  * So, report 1 finger, but with both slots empty.
 853                  * We will use slot 1 on subsequent 1->1
 854                  */
 855                 if (priv->mt_state_lost) {
 856                         synaptics_mt_state_set(mt_state, 1, -1, -1);
 857                         break;
 858                 }
 859                 /*
 860                  * Since the last AGM was NOT (0,0,0), it was the finger in
 861                  * slot 0 that has been removed.
 862                  * So, SGM now contains previous AGM's slot, and AGM is now
 863                  * empty.
 864                  */
 865                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
 866                 break;
 867         case 3:
 868                 /*
 869                  * Since last AGM was not (0,0,0), we don't know which finger
 870                  * is left.
 871                  *
 872                  * So, report 1 finger, but with both slots empty.
 873                  * We will use slot 1 on subsequent 1->1
 874                  */
 875                 synaptics_mt_state_set(mt_state, 1, -1, -1);
 876                 priv->mt_state_lost = true;
 877                 break;
 878         case 4:
 879         case 5:
 880                 /* mt_state was updated by AGM-CONTACT packet */
 881                 break;
 882         }
 883 }
 884
 885 /* Handle case where mt_state->count = 2 */
 886 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
 887                                       struct synaptics_mt_state *mt_state)
 888 {
 889         struct synaptics_mt_state *old = &priv->mt_state;
 890
 891         switch (old->count) {
 892         case 0:
 893                 synaptics_mt_state_set(mt_state, 2, 0, 1);
 894                 break;
 895         case 1:
 896                 /*
 897                  * If previous SGM contained slot 1 or higher, SGM now contains
 898                  * slot 0 (the newly touching finger) and AGM contains SGM's
 899                  * previous slot.
 900                  *
 901                  * Otherwise, SGM still contains slot 0 and AGM now contains
 902                  * slot 1.
 903                  */
 904                 if (old->sgm >= 1)
 905                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
 906                 else
 907                         synaptics_mt_state_set(mt_state, 2, 0, 1);
 908                 break;
 909         case 2:
 910                 /*
 911                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
 912                  * we don't know which.
 913                  * So, we just assume that the SGM contains slot 0 and AGM 1.
 914                  */
 915                 if (priv->mt_state_lost)
 916                         synaptics_mt_state_set(mt_state, 2, 0, 1);
 917                 /*
 918                  * Otherwise, use the same mt_state, since it either hasn't
 919                  * changed, or was updated by a recently received AGM-CONTACT
 920                  * packet.
 921                  */
 922                 break;
 923         case 3:
 924                 /*
 925                  * 3->2 transitions have two unsolvable problems:
 926                  *  1) no indication is given which finger was removed
 927                  *  2) no way to tell if agm packet was for finger 3
 928                  *     before 3->2, or finger 2 after 3->2.
 929                  *
 930                  * So, report 2 fingers, but empty all slots.
 931                  * We will guess slots [0,1] on subsequent 2->2.
 932                  */
 933                 synaptics_mt_state_set(mt_state, 2, -1, -1);
 934                 priv->mt_state_lost = true;
 935                 break;
 936         case 4:
 937         case 5:
 938                 /* mt_state was updated by AGM-CONTACT packet */
 939                 break;
 940         }
 941 }
 942
 943 /* Handle case where mt_state->count = 3 */
 944 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
 945                                       struct synaptics_mt_state *mt_state)
 946 {
 947         struct synaptics_mt_state *old = &priv->mt_state;
 948
 949         switch (old->count) {
 950         case 0:
 951                 synaptics_mt_state_set(mt_state, 3, 0, 2);
 952                 break;
 953         case 1:
 954                 /*
 955                  * If previous SGM contained slot 2 or higher, SGM now contains
 956                  * slot 0 (one of the newly touching fingers) and AGM contains
 957                  * SGM's previous slot.
 958                  *
 959                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
 960                  */
 961                 if (old->sgm >= 2)
 962                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
 963                 else
 964                         synaptics_mt_state_set(mt_state, 3, 0, 2);
 965                 break;
 966         case 2:
 967                 /*
 968                  * If the AGM previously contained slot 3 or higher, then the
 969                  * newly touching finger is in the lowest available slot.
 970                  *
 971                  * If SGM was previously 1 or higher, then the new SGM is
 972                  * now slot 0 (with a new finger), otherwise, the new finger
 973                  * is now in a hidden slot between 0 and AGM's slot.
 974                  *
 975                  * In all such cases, the SGM now contains slot 0, and the AGM
 976                  * continues to contain the same slot as before.
 977                  */
 978                 if (old->agm >= 3) {
 979                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
 980                         break;
 981                 }
 982
 983                 /*
 984                  * After some 3->1 and all 3->2 transitions, we lose track
 985                  * of which slot is reported by SGM and AGM.
 986                  *
 987                  * For 2->3 in this state, report 3 fingers, but empty all
 988                  * slots, and we will guess (0,2) on a subsequent 0->3.
 989                  *
 990                  * To userspace, the resulting transition will look like:
 991                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
 992                  */
 993                 if (priv->mt_state_lost) {
 994                         synaptics_mt_state_set(mt_state, 3, -1, -1);
 995                         break;
 996                 }
 997
 998                 /*
 999                  * If the (SGM,AGM) really previously contained slots (0, 1),
1000                  * then we cannot know what slot was just reported by the AGM,
1001                  * because the 2->3 transition can occur either before or after
1002                  * the AGM packet. Thus, this most recent AGM could contain
1003                  * either the same old slot 1 or the new slot 2.
1004                  * Subsequent AGMs will be reporting slot 2.
1005                  *
1006                  * To userspace, the resulting transition will look like:
1007                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1008                  */
1009                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1010                 break;
1011         case 3:
1012                 /*
1013                  * If, for whatever reason, the previous agm was invalid,
1014                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1015                  */
1016                 if (old->agm <= 2)
1017                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1018                 /*
1019                  * mt_state either hasn't changed, or was updated by a recently
1020                  * received AGM-CONTACT packet.
1021                  */
1022                 break;
1023
1024         case 4:
1025         case 5:
1026                 /* mt_state was updated by AGM-CONTACT packet */
1027                 break;
1028         }
1029 }
1030
1031 /* Handle case where mt_state->count = 4, or = 5 */
1032 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1033                                        struct synaptics_mt_state *mt_state)
1034 {
1035         /* mt_state was updated correctly by AGM-CONTACT packet */
1036         priv->mt_state_lost = false;
1037 }
1038
1039 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1040                                            struct synaptics_hw_state *sgm)
1041 {
1042         struct synaptics_data *priv = psmouse->private;
1043         struct synaptics_hw_state *agm = &priv->agm;
1044         struct synaptics_mt_state mt_state;
1045
1046         /* Initialize using current mt_state (as updated by last agm) */
1047         mt_state = agm->mt_state;
1048
1049         /*
1050          * Update mt_state using the new finger count and current mt_state.
1051          */
1052         if (sgm->z == 0)
1053                 synaptics_image_sensor_0f(priv, &mt_state);
1054         else if (sgm->w >= 4)
1055                 synaptics_image_sensor_1f(priv, &mt_state);
1056         else if (sgm->w == 0)
1057                 synaptics_image_sensor_2f(priv, &mt_state);
1058         else if (sgm->w == 1 && mt_state.count <= 3)
1059                 synaptics_image_sensor_3f(priv, &mt_state);
1060         else
1061                 synaptics_image_sensor_45f(priv, &mt_state);
1062
1063         /* Send resulting input events to user space */
1064         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1065
1066         /* Store updated mt_state */
1067         priv->mt_state = agm->mt_state = mt_state;
1068         priv->agm_pending = false;
1069 }
1070
1071 /*
1072  *  called for each full received packet from the touchpad
1073  */
1074 static void synaptics_process_packet(struct psmouse *psmouse)
1075 {
1076         struct input_dev *dev = psmouse->dev;
1077         struct synaptics_data *priv = psmouse->private;
1078         struct synaptics_hw_state hw;
1079         int num_fingers;
1080         int finger_width;
1081
1082         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1083                 return;
1084
1085         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1086                 synaptics_image_sensor_process(psmouse, &hw);
1087                 return;
1088         }
1089
1090         if (hw.scroll) {
1091                 priv->scroll += hw.scroll;
1092
1093                 while (priv->scroll >= 4) {
1094                         input_report_key(dev, BTN_BACK, !hw.down);
1095                         input_sync(dev);
1096                         input_report_key(dev, BTN_BACK, hw.down);
1097                         input_sync(dev);
1098                         priv->scroll -= 4;
1099                 }
1100                 while (priv->scroll <= -4) {
1101                         input_report_key(dev, BTN_FORWARD, !hw.up);
1102                         input_sync(dev);
1103                         input_report_key(dev, BTN_FORWARD, hw.up);
1104                         input_sync(dev);
1105                         priv->scroll += 4;
1106                 }
1107                 return;
1108         }
1109
1110         if (hw.z > 0 && hw.x > 1) {
1111                 num_fingers = 1;
1112                 finger_width = 5;
1113                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1114                         switch (hw.w) {
1115                         case 0 ... 1:
1116                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1117                                         num_fingers = hw.w + 2;
1118                                 break;
1119                         case 2:
1120                                 if (SYN_MODEL_PEN(priv->model_id))
1121                                         ;   /* Nothing, treat a pen as a single finger */
1122                                 break;
1123                         case 4 ... 15:
1124                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1125                                         finger_width = hw.w;
1126                                 break;
1127                         }
1128                 }
1129         } else {
1130                 num_fingers = 0;
1131                 finger_width = 0;
1132         }
1133
1134         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1135                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1136                                               num_fingers);
1137
1138         /* Post events
1139          * BTN_TOUCH has to be first as mousedev relies on it when doing
1140          * absolute -> relative conversion
1141          */
1142         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1143         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1144
1145         if (num_fingers > 0) {
1146                 input_report_abs(dev, ABS_X, hw.x);
1147                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1148         }
1149         input_report_abs(dev, ABS_PRESSURE, hw.z);
1150
1151         if (SYN_CAP_PALMDETECT(priv->capabilities))
1152                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1153
1154         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1155         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1156                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1157                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1158         }
1159
1160         synaptics_report_buttons(psmouse, &hw);
1161
1162         input_sync(dev);
1163 }
1164
1165 static int synaptics_validate_byte(struct psmouse *psmouse,
1166                                    int idx, unsigned char pkt_type)
1167 {
1168         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1169         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1170         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1171         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1172         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1173         const char *packet = psmouse->packet;
1174
1175         if (idx < 0 || idx > 4)
1176                 return 0;
1177
1178         switch (pkt_type) {
1179
1180         case SYN_NEWABS:
1181         case SYN_NEWABS_RELAXED:
1182                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1183
1184         case SYN_NEWABS_STRICT:
1185                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1186
1187         case SYN_OLDABS:
1188                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1189
1190         default:
1191                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1192                 return 0;
1193         }
1194 }
1195
1196 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1197 {
1198         int i;
1199
1200         for (i = 0; i < 5; i++)
1201                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1202                         psmouse_info(psmouse, "using relaxed packet validation\n");
1203                         return SYN_NEWABS_RELAXED;
1204                 }
1205
1206         return SYN_NEWABS_STRICT;
1207 }
1208
1209 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1210 {
1211         struct synaptics_data *priv = psmouse->private;
1212
1213         if (psmouse->pktcnt >= 6) { /* Full packet received */
1214                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1215                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1216
1217                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1218                     synaptics_is_pt_packet(psmouse->packet)) {
1219                         if (priv->pt_port)
1220                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1221                 } else
1222                         synaptics_process_packet(psmouse);
1223
1224                 return PSMOUSE_FULL_PACKET;
1225         }
1226
1227         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1228                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1229 }
1230
1231 /*****************************************************************************
1232  *      Driver initialization/cleanup functions
1233  ****************************************************************************/
1234 static void set_abs_position_params(struct input_dev *dev,
1235                                     struct synaptics_data *priv, int x_code,
1236                                     int y_code)
1237 {
1238         int x_min = priv->x_min ?: XMIN_NOMINAL;
1239         int x_max = priv->x_max ?: XMAX_NOMINAL;
1240         int y_min = priv->y_min ?: YMIN_NOMINAL;
1241         int y_max = priv->y_max ?: YMAX_NOMINAL;
1242         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1243                         SYN_REDUCED_FILTER_FUZZ : 0;
1244
1245         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1246         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1247         input_abs_set_res(dev, x_code, priv->x_res);
1248         input_abs_set_res(dev, y_code, priv->y_res);
1249 }
1250
1251 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
1252 {
1253         int i;
1254
1255         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1256
1257         __set_bit(EV_ABS, dev->evbit);
1258         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1259         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1260
1261         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1262                 input_mt_init_slots(dev, 2);
1263                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1264                                         ABS_MT_POSITION_Y);
1265                 /* Image sensors can report per-contact pressure */
1266                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1267
1268                 /* Image sensors can signal 4 and 5 finger clicks */
1269                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1270                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1271         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1272                 /* Non-image sensors with AGM use semi-mt */
1273                 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1274                 input_mt_init_slots(dev, 2);
1275                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1276                                         ABS_MT_POSITION_Y);
1277         }
1278
1279         if (SYN_CAP_PALMDETECT(priv->capabilities))
1280                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1281
1282         __set_bit(EV_KEY, dev->evbit);
1283         __set_bit(BTN_TOUCH, dev->keybit);
1284         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1285         __set_bit(BTN_LEFT, dev->keybit);
1286         __set_bit(BTN_RIGHT, dev->keybit);
1287
1288         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1289                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1290                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1291         }
1292
1293         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1294                 __set_bit(BTN_MIDDLE, dev->keybit);
1295
1296         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1297             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1298                 __set_bit(BTN_FORWARD, dev->keybit);
1299                 __set_bit(BTN_BACK, dev->keybit);
1300         }
1301
1302         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1303                 __set_bit(BTN_0 + i, dev->keybit);
1304
1305         __clear_bit(EV_REL, dev->evbit);
1306         __clear_bit(REL_X, dev->relbit);
1307         __clear_bit(REL_Y, dev->relbit);
1308
1309         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1310                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1311                 /* Clickpads report only left button */
1312                 __clear_bit(BTN_RIGHT, dev->keybit);
1313                 __clear_bit(BTN_MIDDLE, dev->keybit);
1314         }
1315 }
1316
1317 static void synaptics_disconnect(struct psmouse *psmouse)
1318 {
1319         synaptics_reset(psmouse);
1320         kfree(psmouse->private);
1321         psmouse->private = NULL;
1322 }
1323
1324 static int synaptics_reconnect(struct psmouse *psmouse)
1325 {
1326         struct synaptics_data *priv = psmouse->private;
1327         struct synaptics_data old_priv = *priv;
1328         int retry = 0;
1329         int error;
1330
1331         do {
1332                 psmouse_reset(psmouse);
1333                 if (retry) {
1334                         /*
1335                          * On some boxes, right after resuming, the touchpad
1336                          * needs some time to finish initializing (I assume
1337                          * it needs time to calibrate) and start responding
1338                          * to Synaptics-specific queries, so let's wait a
1339                          * bit.
1340                          */
1341                         ssleep(1);
1342                 }
1343                 error = synaptics_detect(psmouse, 0);
1344         } while (error && ++retry < 3);
1345
1346         if (error)
1347                 return -1;
1348
1349         if (retry > 1)
1350                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1351
1352         if (synaptics_query_hardware(psmouse)) {
1353                 psmouse_err(psmouse, "Unable to query device.\n");
1354                 return -1;
1355         }
1356
1357         if (synaptics_set_absolute_mode(psmouse)) {
1358                 psmouse_err(psmouse, "Unable to initialize device.\n");
1359                 return -1;
1360         }
1361
1362         if (synaptics_set_advanced_gesture_mode(psmouse)) {
1363                 psmouse_err(psmouse,
1364                             "Advanced gesture mode reconnect failed.\n");
1365                 return -1;
1366         }
1367
1368         if (old_priv.identity != priv->identity ||
1369             old_priv.model_id != priv->model_id ||
1370             old_priv.capabilities != priv->capabilities ||
1371             old_priv.ext_cap != priv->ext_cap) {
1372                 psmouse_err(psmouse,
1373                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1374                             old_priv.identity, priv->identity,
1375                             old_priv.model_id, priv->model_id,
1376                             old_priv.capabilities, priv->capabilities,
1377                             old_priv.ext_cap, priv->ext_cap);
1378                 return -1;
1379         }
1380
1381         return 0;
1382 }
1383
1384 static bool impaired_toshiba_kbc;
1385
1386 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
1387 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1388         {
1389                 /* Toshiba Satellite */
1390                 .matches = {
1391                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1392                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1393                 },
1394         },
1395         {
1396                 /* Toshiba Dynabook */
1397                 .matches = {
1398                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1399                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1400                 },
1401         },
1402         {
1403                 /* Toshiba Portege M300 */
1404                 .matches = {
1405                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1406                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1407                 },
1408
1409         },
1410         {
1411                 /* Toshiba Portege M300 */
1412                 .matches = {
1413                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1414                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1415                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1416                 },
1417
1418         },
1419 #endif
1420         { }
1421 };
1422
1423 static bool broken_olpc_ec;
1424
1425 static const struct dmi_system_id __initconst olpc_dmi_table[] = {
1426 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1427         {
1428                 /* OLPC XO-1 or XO-1.5 */
1429                 .matches = {
1430                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1431                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1432                 },
1433         },
1434 #endif
1435         { }
1436 };
1437
1438 static const struct dmi_system_id min_max_dmi_table[] __initconst = {
1439 #if defined(CONFIG_DMI)
1440         {
1441                 /* Lenovo ThinkPad Helix */
1442                 .matches = {
1443                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1444                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"),
1445                 },
1446                 .driver_data = (int []){1024, 5052, 2258, 4832},
1447         },
1448         {
1449                 /* Lenovo ThinkPad X240 */
1450                 .matches = {
1451                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1452                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X240"),
1453                 },
1454                 .driver_data = (int []){1232, 5710, 1156, 4696},
1455         },
1456         {
1457                 /* Lenovo ThinkPad Edge E431 */
1458                 .matches = {
1459                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1460                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Edge E431"),
1461                 },
1462                 .driver_data = (int []){1024, 5022, 2508, 4832},
1463         },
1464         {
1465                 /* Lenovo ThinkPad T431s */
1466                 .matches = {
1467                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1468                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T431"),
1469                 },
1470                 .driver_data = (int []){1024, 5112, 2024, 4832},
1471         },
1472         {
1473                 /* Lenovo ThinkPad T440s */
1474                 .matches = {
1475                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1476                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T440"),
1477                 },
1478                 .driver_data = (int []){1024, 5112, 2024, 4832},
1479         },
1480         {
1481                 /* Lenovo ThinkPad L440 */
1482                 .matches = {
1483                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1484                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L440"),
1485                 },
1486                 .driver_data = (int []){1024, 5112, 2024, 4832},
1487         },
1488         {
1489                 /* Lenovo ThinkPad T540p */
1490                 .matches = {
1491                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1492                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T540"),
1493                 },
1494                 .driver_data = (int []){1024, 5112, 2024, 4832},
1495         },
1496         {
1497                 /* Lenovo ThinkPad L540 */
1498                 .matches = {
1499                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1500                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad L540"),
1501                 },
1502                 .driver_data = (int []){1024, 5112, 2024, 4832},
1503         },
1504         {
1505                 /* Lenovo ThinkPad W540 */
1506                 .matches = {
1507                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1508                         DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad W540"),
1509                 },
1510                 .driver_data = (int []){1024, 5112, 2024, 4832},
1511         },
1512         {
1513                 /* Lenovo Yoga S1 */
1514                 .matches = {
1515                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1516                         DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
1517                                         "ThinkPad S1 Yoga"),
1518                 },
1519                 .driver_data = (int []){1232, 5710, 1156, 4696},
1520         },
1521         {
1522                 /* Lenovo ThinkPad X1 Carbon Haswell (3rd generation) */
1523                 .matches = {
1524                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1525                         DMI_MATCH(DMI_PRODUCT_VERSION,
1526                                         "ThinkPad X1 Carbon 2nd"),
1527                 },
1528                 .driver_data = (int []){1024, 5112, 2024, 4832},
1529         },
1530 #endif
1531         { }
1532 };
1533
1534 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1535 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1536         {
1537                 .matches = {
1538                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1539                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1540                 },
1541         },
1542 #endif
1543         { }
1544 };
1545
1546 void __init synaptics_module_init(void)
1547 {
1548         const struct dmi_system_id *min_max_dmi;
1549
1550         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1551         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1552
1553         min_max_dmi = dmi_first_match(min_max_dmi_table);
1554         if (min_max_dmi)
1555                 quirk_min_max = min_max_dmi->driver_data;
1556
1557         /*
1558          * Unfortunately ForcePad capability is not exported over PS/2,
1559          * so we have to resort to checking DMI.
1560          */
1561         is_forcepad = dmi_check_system(forcepad_dmi_table);
1562 }
1563
1564 int synaptics_init(struct psmouse *psmouse)
1565 {
1566         struct synaptics_data *priv;
1567
1568         /*
1569          * The OLPC XO has issues with Synaptics' absolute mode; similarly to
1570          * the HGPK, it quickly degrades and the hardware becomes jumpy and
1571          * overly sensitive.  Not only that, but the constant packet spew
1572          * (even at a lowered 40pps rate) overloads the EC such that key
1573          * presses on the keyboard are missed.  Given all of that, don't
1574          * even attempt to use Synaptics mode.  Relative mode seems to work
1575          * just fine.
1576          */
1577         if (broken_olpc_ec) {
1578                 psmouse_info(psmouse,
1579                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1580                 return -ENODEV;
1581         }
1582
1583         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1584         if (!priv)
1585                 return -ENOMEM;
1586
1587         psmouse_reset(psmouse);
1588
1589         if (synaptics_query_hardware(psmouse)) {
1590                 psmouse_err(psmouse, "Unable to query device.\n");
1591                 goto init_fail;
1592         }
1593
1594         if (synaptics_set_absolute_mode(psmouse)) {
1595                 psmouse_err(psmouse, "Unable to initialize device.\n");
1596                 goto init_fail;
1597         }
1598
1599         if (synaptics_set_advanced_gesture_mode(psmouse)) {
1600                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
1601                 goto init_fail;
1602         }
1603
1604         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1605
1606         psmouse_info(psmouse,
1607                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
1608                      SYN_ID_MODEL(priv->identity),
1609                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1610                      priv->model_id,
1611                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
1612
1613         set_input_params(psmouse->dev, priv);
1614
1615         /*
1616          * Encode touchpad model so that it can be used to set
1617          * input device->id.version and be visible to userspace.
1618          * Because version is __u16 we have to drop something.
1619          * Hardware info bits seem to be good candidates as they
1620          * are documented to be for Synaptics corp. internal use.
1621          */
1622         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1623                           (priv->model_id & 0x000000ff);
1624
1625         psmouse->protocol_handler = synaptics_process_byte;
1626         psmouse->set_rate = synaptics_set_rate;
1627         psmouse->disconnect = synaptics_disconnect;
1628         psmouse->reconnect = synaptics_reconnect;
1629         psmouse->cleanup = synaptics_reset;
1630         psmouse->pktsize = 6;
1631         /* Synaptics can usually stay in sync without extra help */
1632         psmouse->resync_time = 0;
1633
1634         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1635                 synaptics_pt_create(psmouse);
1636
1637         /*
1638          * Toshiba's KBC seems to have trouble handling data from
1639          * Synaptics at full rate.  Switch to a lower rate (roughly
1640          * the same rate as a standard PS/2 mouse).
1641          */
1642         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1643                 psmouse_info(psmouse,
1644                              "Toshiba %s detected, limiting rate to 40pps.\n",
1645                              dmi_get_system_info(DMI_PRODUCT_NAME));
1646                 psmouse->rate = 40;
1647         }
1648
1649         return 0;
1650
1651  init_fail:
1652         kfree(priv);
1653         return -1;
1654 }
1655
1656 bool synaptics_supported(void)
1657 {
1658         return true;
1659 }
1660
1661 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1662
1663 void __init synaptics_module_init(void)
1664 {
1665 }
1666
1667 int synaptics_init(struct psmouse *psmouse)
1668 {
1669         return -ENOSYS;
1670 }
1671
1672 bool synaptics_supported(void)
1673 {
1674         return false;
1675 }
1676
1677 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */