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