drivers/input/mouse/synaptics.c

   1 /*
   2  * Synaptics TouchPad PS/2 mouse driver
   3  *
   4  *   2003 Dmitry Torokhov <dtor@mail.ru>
   5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   6  *     for explaining various Synaptics quirks.
   7  *
   8  *   2003 Peter Osterlund <petero2@telia.com>
   9  *     Ported to 2.5 input device infrastructure.
  10  *
  11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  12  *     start merging tpconfig and gpm code to a xfree-input module
  13  *     adding some changes and extensions (ex. 3rd and 4th button)
  14  *
  15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  17  *     code for the special synaptics commands (from the tpconfig-source)
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License version 2 as published by
  21  * the Free Software Foundation.
  22  *
  23  * Trademarks are the property of their respective owners.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/delay.h>
  28 #include <linux/dmi.h>
  29 #include <linux/input/mt.h>
  30 #include <linux/serio.h>
  31 #include <linux/libps2.h>
  32 #include <linux/slab.h>
  33 #include "psmouse.h"
  34 #include "synaptics.h"
  35
  36 /*
  37  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  38  * section 2.3.2, which says that they should be valid regardless of the
  39  * actual size of the sensor.
  40  * Note that newer firmware allows querying device for maximum useable
  41  * coordinates.
  42  */
  43 #define XMIN 0
  44 #define XMAX 6143
  45 #define YMIN 0
  46 #define YMAX 6143
  47 #define XMIN_NOMINAL 1472
  48 #define XMAX_NOMINAL 5472
  49 #define YMIN_NOMINAL 1408
  50 #define YMAX_NOMINAL 4448
  51
  52 /* Size in bits of absolute position values reported by the hardware */
  53 #define ABS_POS_BITS 13
  54
  55 /*
  56  * These values should represent the absolute maximum value that will
  57  * be reported for a positive position value. Some Synaptics firmware
  58  * uses this value to indicate a finger near the edge of the touchpad
  59  * whose precise position cannot be determined.
  60  *
  61  * At least one touchpad is known to report positions in excess of this
  62  * value which are actually negative values truncated to the 13-bit
  63  * reporting range. These values have never been observed to be lower
  64  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  65  * negative and any other value as positive.
  66  */
  67 #define X_MAX_POSITIVE 8176
  68 #define Y_MAX_POSITIVE 8176
  69
  70 /*****************************************************************************
  71  *      Stuff we need even when we do not want native Synaptics support
  72  ****************************************************************************/
  73
  74 /*
  75  * Set the synaptics touchpad mode byte by special commands
  76  */
  77 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  78 {
  79         unsigned char param[1];
  80
  81         if (psmouse_sliced_command(psmouse, mode))
  82                 return -1;
  83         param[0] = SYN_PS_SET_MODE2;
  84         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  85                 return -1;
  86         return 0;
  87 }
  88
  89 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  90 {
  91         struct ps2dev *ps2dev = &psmouse->ps2dev;
  92         unsigned char param[4];
  93
  94         param[0] = 0;
  95
  96         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  97         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  98         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  99         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 100         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 101
 102         if (param[1] != 0x47)
 103                 return -ENODEV;
 104
 105         if (set_properties) {
 106                 psmouse->vendor = "Synaptics";
 107                 psmouse->name = "TouchPad";
 108         }
 109
 110         return 0;
 111 }
 112
 113 void synaptics_reset(struct psmouse *psmouse)
 114 {
 115         /* reset touchpad back to relative mode, gestures enabled */
 116         synaptics_mode_cmd(psmouse, 0);
 117 }
 118
 119 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 120
 121 static bool cr48_profile_sensor;
 122
 123 struct min_max_quirk {
 124         const char * const *pnp_ids;
 125         int x_min, x_max, y_min, y_max;
 126 };
 127
 128 static const struct min_max_quirk min_max_pnpid_table[] = {
 129         {
 130                 (const char * const []){"LEN0033", NULL},
 131                 1024, 5052, 2258, 4832
 132         },
 133         {
 134                 (const char * const []){"LEN0035", "LEN0042", NULL},
 135                 1232, 5710, 1156, 4696
 136         },
 137         {
 138                 (const char * const []){"LEN0034", "LEN0036", "LEN0039",
 139                                         "LEN2002", "LEN2004", NULL},
 140                 1024, 5112, 2024, 4832
 141         },
 142         {
 143                 (const char * const []){"LEN2001", NULL},
 144                 1024, 5022, 2508, 4832
 145         },
 146         {
 147                 (const char * const []){"LEN2006", NULL},
 148                 1264, 5675, 1171, 4688
 149         },
 150         { }
 151 };
 152
 153 /* This list has been kindly provided by Synaptics. */
 154 static const char * const topbuttonpad_pnp_ids[] = {
 155         "LEN0017",
 156         "LEN0018",
 157         "LEN0019",
 158         "LEN0023",
 159         "LEN002A",
 160         "LEN002B",
 161         "LEN002C",
 162         "LEN002D",
 163         "LEN002E",
 164         "LEN0033", /* Helix */
 165         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 166         "LEN0035", /* X240 */
 167         "LEN0036", /* T440 */
 168         "LEN0037",
 169         "LEN0038",
 170         "LEN0039", /* T440s */
 171         "LEN0041",
 172         "LEN0042", /* Yoga */
 173         "LEN0045",
 174         "LEN0046",
 175         "LEN0047",
 176         "LEN0048",
 177         "LEN0049",
 178         "LEN2000",
 179         "LEN2001", /* Edge E431 */
 180         "LEN2002", /* Edge E531 */
 181         "LEN2003",
 182         "LEN2004", /* L440 */
 183         "LEN2005",
 184         "LEN2006",
 185         "LEN2007",
 186         "LEN2008",
 187         "LEN2009",
 188         "LEN200A",
 189         "LEN200B",
 190         NULL
 191 };
 192
 193 /*****************************************************************************
 194  *      Synaptics communications functions
 195  ****************************************************************************/
 196
 197 /*
 198  * Synaptics touchpads report the y coordinate from bottom to top, which is
 199  * opposite from what userspace expects.
 200  * This function is used to invert y before reporting.
 201  */
 202 static int synaptics_invert_y(int y)
 203 {
 204         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 205 }
 206
 207 /*
 208  * Send a command to the synpatics touchpad by special commands
 209  */
 210 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 211 {
 212         if (psmouse_sliced_command(psmouse, c))
 213                 return -1;
 214         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 215                 return -1;
 216         return 0;
 217 }
 218
 219 /*
 220  * Read the model-id bytes from the touchpad
 221  * see also SYN_MODEL_* macros
 222  */
 223 static int synaptics_model_id(struct psmouse *psmouse)
 224 {
 225         struct synaptics_data *priv = psmouse->private;
 226         unsigned char mi[3];
 227
 228         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 229                 return -1;
 230         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 231         return 0;
 232 }
 233
 234 /*
 235  * Read the board id from the touchpad
 236  * The board id is encoded in the "QUERY MODES" response
 237  */
 238 static int synaptics_board_id(struct psmouse *psmouse)
 239 {
 240         struct synaptics_data *priv = psmouse->private;
 241         unsigned char bid[3];
 242
 243         if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid))
 244                 return -1;
 245         priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 246         return 0;
 247 }
 248
 249 /*
 250  * Read the firmware id from the touchpad
 251  */
 252 static int synaptics_firmware_id(struct psmouse *psmouse)
 253 {
 254         struct synaptics_data *priv = psmouse->private;
 255         unsigned char fwid[3];
 256
 257         if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid))
 258                 return -1;
 259         priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 260         return 0;
 261 }
 262
 263 /*
 264  * Read the capability-bits from the touchpad
 265  * see also the SYN_CAP_* macros
 266  */
 267 static int synaptics_capability(struct psmouse *psmouse)
 268 {
 269         struct synaptics_data *priv = psmouse->private;
 270         unsigned char cap[3];
 271
 272         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 273                 return -1;
 274         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 275         priv->ext_cap = priv->ext_cap_0c = 0;
 276
 277         /*
 278          * Older firmwares had submodel ID fixed to 0x47
 279          */
 280         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 281             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 282                 return -1;
 283         }
 284
 285         /*
 286          * Unless capExtended is set the rest of the flags should be ignored
 287          */
 288         if (!SYN_CAP_EXTENDED(priv->capabilities))
 289                 priv->capabilities = 0;
 290
 291         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 292                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 293                         psmouse_warn(psmouse,
 294                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 295                 } else {
 296                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 297
 298                         /*
 299                          * if nExtBtn is greater than 8 it should be considered
 300                          * invalid and treated as 0
 301                          */
 302                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 303                                 priv->ext_cap &= 0xff0fff;
 304                 }
 305         }
 306
 307         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 308                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 309                         psmouse_warn(psmouse,
 310                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 311                 } else {
 312                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 313                 }
 314         }
 315
 316         return 0;
 317 }
 318
 319 /*
 320  * Identify Touchpad
 321  * See also the SYN_ID_* macros
 322  */
 323 static int synaptics_identify(struct psmouse *psmouse)
 324 {
 325         struct synaptics_data *priv = psmouse->private;
 326         unsigned char id[3];
 327
 328         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 329                 return -1;
 330         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 331         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 332                 return 0;
 333         return -1;
 334 }
 335
 336 /*
 337  * Read touchpad resolution and maximum reported coordinates
 338  * Resolution is left zero if touchpad does not support the query
 339  */
 340
 341 static int synaptics_resolution(struct psmouse *psmouse)
 342 {
 343         struct synaptics_data *priv = psmouse->private;
 344         unsigned char resp[3];
 345         int i;
 346
 347         if (SYN_ID_MAJOR(priv->identity) < 4)
 348                 return 0;
 349
 350         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 351                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 352                         priv->x_res = resp[0]; /* x resolution in units/mm */
 353                         priv->y_res = resp[2]; /* y resolution in units/mm */
 354                 }
 355         }
 356
 357         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 358                 if (psmouse_matches_pnp_id(psmouse,
 359                                            min_max_pnpid_table[i].pnp_ids)) {
 360                         priv->x_min = min_max_pnpid_table[i].x_min;
 361                         priv->x_max = min_max_pnpid_table[i].x_max;
 362                         priv->y_min = min_max_pnpid_table[i].y_min;
 363                         priv->y_max = min_max_pnpid_table[i].y_max;
 364                         return 0;
 365                 }
 366         }
 367
 368         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 369             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 370                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 371                         psmouse_warn(psmouse,
 372                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 373                 } else {
 374                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 375                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 376                 }
 377         }
 378
 379         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 380             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 381                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 382                         psmouse_warn(psmouse,
 383                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 384                 } else {
 385                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 386                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 387                 }
 388         }
 389
 390         return 0;
 391 }
 392
 393 static int synaptics_query_hardware(struct psmouse *psmouse)
 394 {
 395         if (synaptics_identify(psmouse))
 396                 return -1;
 397         if (synaptics_model_id(psmouse))
 398                 return -1;
 399         if (synaptics_firmware_id(psmouse))
 400                 return -1;
 401         if (synaptics_board_id(psmouse))
 402                 return -1;
 403         if (synaptics_capability(psmouse))
 404                 return -1;
 405         if (synaptics_resolution(psmouse))
 406                 return -1;
 407
 408         return 0;
 409 }
 410
 411 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 412 {
 413         static unsigned char param = 0xc8;
 414         struct synaptics_data *priv = psmouse->private;
 415
 416         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 417               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 418                 return 0;
 419
 420         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 421                 return -1;
 422
 423         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 424                 return -1;
 425
 426         /* Advanced gesture mode also sends multi finger data */
 427         priv->capabilities |= BIT(1);
 428
 429         return 0;
 430 }
 431
 432 static int synaptics_set_mode(struct psmouse *psmouse)
 433 {
 434         struct synaptics_data *priv = psmouse->private;
 435
 436         priv->mode = 0;
 437         if (priv->absolute_mode)
 438                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 439         if (priv->disable_gesture)
 440                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 441         if (psmouse->rate >= 80)
 442                 priv->mode |= SYN_BIT_HIGH_RATE;
 443         if (SYN_CAP_EXTENDED(priv->capabilities))
 444                 priv->mode |= SYN_BIT_W_MODE;
 445
 446         if (synaptics_mode_cmd(psmouse, priv->mode))
 447                 return -1;
 448
 449         if (priv->absolute_mode &&
 450             synaptics_set_advanced_gesture_mode(psmouse)) {
 451                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 452                 return -1;
 453         }
 454
 455         return 0;
 456 }
 457
 458 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 459 {
 460         struct synaptics_data *priv = psmouse->private;
 461
 462         if (rate >= 80) {
 463                 priv->mode |= SYN_BIT_HIGH_RATE;
 464                 psmouse->rate = 80;
 465         } else {
 466                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 467                 psmouse->rate = 40;
 468         }
 469
 470         synaptics_mode_cmd(psmouse, priv->mode);
 471 }
 472
 473 /*****************************************************************************
 474  *      Synaptics pass-through PS/2 port support
 475  ****************************************************************************/
 476 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 477 {
 478         struct psmouse *parent = serio_get_drvdata(serio->parent);
 479         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 480
 481         if (psmouse_sliced_command(parent, c))
 482                 return -1;
 483         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 484                 return -1;
 485         return 0;
 486 }
 487
 488 static int synaptics_pt_start(struct serio *serio)
 489 {
 490         struct psmouse *parent = serio_get_drvdata(serio->parent);
 491         struct synaptics_data *priv = parent->private;
 492
 493         serio_pause_rx(parent->ps2dev.serio);
 494         priv->pt_port = serio;
 495         serio_continue_rx(parent->ps2dev.serio);
 496
 497         return 0;
 498 }
 499
 500 static void synaptics_pt_stop(struct serio *serio)
 501 {
 502         struct psmouse *parent = serio_get_drvdata(serio->parent);
 503         struct synaptics_data *priv = parent->private;
 504
 505         serio_pause_rx(parent->ps2dev.serio);
 506         priv->pt_port = NULL;
 507         serio_continue_rx(parent->ps2dev.serio);
 508 }
 509
 510 static int synaptics_is_pt_packet(unsigned char *buf)
 511 {
 512         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 513 }
 514
 515 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 516 {
 517         struct psmouse *child = serio_get_drvdata(ptport);
 518
 519         if (child && child->state == PSMOUSE_ACTIVATED) {
 520                 serio_interrupt(ptport, packet[1], 0);
 521                 serio_interrupt(ptport, packet[4], 0);
 522                 serio_interrupt(ptport, packet[5], 0);
 523                 if (child->pktsize == 4)
 524                         serio_interrupt(ptport, packet[2], 0);
 525         } else
 526                 serio_interrupt(ptport, packet[1], 0);
 527 }
 528
 529 static void synaptics_pt_activate(struct psmouse *psmouse)
 530 {
 531         struct synaptics_data *priv = psmouse->private;
 532         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 533
 534         /* adjust the touchpad to child's choice of protocol */
 535         if (child) {
 536                 if (child->pktsize == 4)
 537                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 538                 else
 539                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 540
 541                 if (synaptics_mode_cmd(psmouse, priv->mode))
 542                         psmouse_warn(psmouse,
 543                                      "failed to switch guest protocol\n");
 544         }
 545 }
 546
 547 static void synaptics_pt_create(struct psmouse *psmouse)
 548 {
 549         struct serio *serio;
 550
 551         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 552         if (!serio) {
 553                 psmouse_err(psmouse,
 554                             "not enough memory for pass-through port\n");
 555                 return;
 556         }
 557
 558         serio->id.type = SERIO_PS_PSTHRU;
 559         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 560         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 561         serio->write = synaptics_pt_write;
 562         serio->start = synaptics_pt_start;
 563         serio->stop = synaptics_pt_stop;
 564         serio->parent = psmouse->ps2dev.serio;
 565
 566         psmouse->pt_activate = synaptics_pt_activate;
 567
 568         psmouse_info(psmouse, "serio: %s port at %s\n",
 569                      serio->name, psmouse->phys);
 570         serio_register_port(serio);
 571 }
 572
 573 /*****************************************************************************
 574  *      Functions to interpret the absolute mode packets
 575  ****************************************************************************/
 576
 577 static void synaptics_parse_agm(const unsigned char buf[],
 578                                 struct synaptics_data *priv,
 579                                 struct synaptics_hw_state *hw)
 580 {
 581         struct synaptics_hw_state *agm = &priv->agm;
 582         int agm_packet_type;
 583
 584         agm_packet_type = (buf[5] & 0x30) >> 4;
 585         switch (agm_packet_type) {
 586         case 1:
 587                 /* Gesture packet: (x, y, z) half resolution */
 588                 agm->w = hw->w;
 589                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 590                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 591                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 592                 break;
 593
 594         case 2:
 595                 /* AGM-CONTACT packet: we are only interested in the count */
 596                 priv->agm_count = buf[1];
 597                 break;
 598
 599         default:
 600                 break;
 601         }
 602 }
 603
 604 static bool is_forcepad;
 605
 606 static int synaptics_parse_hw_state(const unsigned char buf[],
 607                                     struct synaptics_data *priv,
 608                                     struct synaptics_hw_state *hw)
 609 {
 610         memset(hw, 0, sizeof(struct synaptics_hw_state));
 611
 612         if (SYN_MODEL_NEWABS(priv->model_id)) {
 613                 hw->w = (((buf[0] & 0x30) >> 2) |
 614                          ((buf[0] & 0x04) >> 1) |
 615                          ((buf[3] & 0x04) >> 2));
 616
 617                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 618                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 619                     hw->w == 2) {
 620                         synaptics_parse_agm(buf, priv, hw);
 621                         return 1;
 622                 }
 623
 624                 hw->x = (((buf[3] & 0x10) << 8) |
 625                          ((buf[1] & 0x0f) << 8) |
 626                          buf[4]);
 627                 hw->y = (((buf[3] & 0x20) << 7) |
 628                          ((buf[1] & 0xf0) << 4) |
 629                          buf[5]);
 630                 hw->z = buf[2];
 631
 632                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 633                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 634
 635                 if (is_forcepad) {
 636                         /*
 637                          * ForcePads, like Clickpads, use middle button
 638                          * bits to report primary button clicks.
 639                          * Unfortunately they report primary button not
 640                          * only when user presses on the pad above certain
 641                          * threshold, but also when there are more than one
 642                          * finger on the touchpad, which interferes with
 643                          * out multi-finger gestures.
 644                          */
 645                         if (hw->z == 0) {
 646                                 /* No contacts */
 647                                 priv->press = priv->report_press = false;
 648                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 649                                 /*
 650                                  * Single-finger touch with pressure above
 651                                  * the threshold. If pressure stays long
 652                                  * enough, we'll start reporting primary
 653                                  * button. We rely on the device continuing
 654                                  * sending data even if finger does not
 655                                  * move.
 656                                  */
 657                                 if  (!priv->press) {
 658                                         priv->press_start = jiffies;
 659                                         priv->press = true;
 660                                 } else if (time_after(jiffies,
 661                                                 priv->press_start +
 662                                                         msecs_to_jiffies(50))) {
 663                                         priv->report_press = true;
 664                                 }
 665                         } else {
 666                                 priv->press = false;
 667                         }
 668
 669                         hw->left = priv->report_press;
 670
 671                 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 672                         /*
 673                          * Clickpad's button is transmitted as middle button,
 674                          * however, since it is primary button, we will report
 675                          * it as BTN_LEFT.
 676                          */
 677                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 678
 679                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 680                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 681                         if (hw->w == 2)
 682                                 hw->scroll = (signed char)(buf[1]);
 683                 }
 684
 685                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 686                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 687                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 688                 }
 689
 690                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 691                     ((buf[0] ^ buf[3]) & 0x02)) {
 692                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 693                         default:
 694                                 /*
 695                                  * if nExtBtn is greater than 8 it should be
 696                                  * considered invalid and treated as 0
 697                                  */
 698                                 break;
 699                         case 8:
 700                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 701                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 702                         case 6:
 703                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 704                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 705                         case 4:
 706                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 707                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 708                         case 2:
 709                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 710                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 711                         }
 712                 }
 713         } else {
 714                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 715                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 716
 717                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 718                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 719
 720                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 721                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 722         }
 723
 724         /*
 725          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 726          * is used by some firmware to indicate a finger at the edge of
 727          * the touchpad whose precise position cannot be determined, so
 728          * convert these values to the maximum axis value.
 729          */
 730         if (hw->x > X_MAX_POSITIVE)
 731                 hw->x -= 1 << ABS_POS_BITS;
 732         else if (hw->x == X_MAX_POSITIVE)
 733                 hw->x = XMAX;
 734
 735         if (hw->y > Y_MAX_POSITIVE)
 736                 hw->y -= 1 << ABS_POS_BITS;
 737         else if (hw->y == Y_MAX_POSITIVE)
 738                 hw->y = YMAX;
 739
 740         return 0;
 741 }
 742
 743 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 744                                           bool active, int x, int y)
 745 {
 746         input_mt_slot(dev, slot);
 747         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 748         if (active) {
 749                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 750                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 751         }
 752 }
 753
 754 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 755                                           const struct synaptics_hw_state *a,
 756                                           const struct synaptics_hw_state *b,
 757                                           int num_fingers)
 758 {
 759         if (num_fingers >= 2) {
 760                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 761                                               min(a->y, b->y));
 762                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 763                                               max(a->y, b->y));
 764         } else if (num_fingers == 1) {
 765                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 766                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 767         } else {
 768                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 769                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 770         }
 771 }
 772
 773 static void synaptics_report_buttons(struct psmouse *psmouse,
 774                                      const struct synaptics_hw_state *hw)
 775 {
 776         struct input_dev *dev = psmouse->dev;
 777         struct synaptics_data *priv = psmouse->private;
 778         int i;
 779
 780         input_report_key(dev, BTN_LEFT, hw->left);
 781         input_report_key(dev, BTN_RIGHT, hw->right);
 782
 783         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 784                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 785
 786         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 787                 input_report_key(dev, BTN_FORWARD, hw->up);
 788                 input_report_key(dev, BTN_BACK, hw->down);
 789         }
 790
 791         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 792                 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
 793 }
 794
 795 static void synaptics_report_mt_data(struct psmouse *psmouse,
 796                                      const struct synaptics_hw_state *sgm,
 797                                      int num_fingers)
 798 {
 799         struct input_dev *dev = psmouse->dev;
 800         struct synaptics_data *priv = psmouse->private;
 801         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 802         struct input_mt_pos pos[2];
 803         int slot[2], nsemi, i;
 804
 805         nsemi = clamp_val(num_fingers, 0, 2);
 806
 807         for (i = 0; i < nsemi; i++) {
 808                 pos[i].x = hw[i]->x;
 809                 pos[i].y = synaptics_invert_y(hw[i]->y);
 810         }
 811
 812         input_mt_assign_slots(dev, slot, pos, nsemi);
 813
 814         for (i = 0; i < nsemi; i++) {
 815                 input_mt_slot(dev, slot[i]);
 816                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 817                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 818                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 819                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 820         }
 821
 822         input_mt_drop_unused(dev);
 823
 824         /* Don't use active slot count to generate BTN_TOOL events. */
 825         input_mt_report_pointer_emulation(dev, false);
 826
 827         /* Send the number of fingers reported by touchpad itself. */
 828         input_mt_report_finger_count(dev, num_fingers);
 829
 830         synaptics_report_buttons(psmouse, sgm);
 831
 832         input_sync(dev);
 833 }
 834
 835 static void synaptics_image_sensor_process(struct psmouse *psmouse,
 836                                            struct synaptics_hw_state *sgm)
 837 {
 838         struct synaptics_data *priv = psmouse->private;
 839         int num_fingers;
 840
 841         /*
 842          * Update mt_state using the new finger count and current mt_state.
 843          */
 844         if (sgm->z == 0)
 845                 num_fingers = 0;
 846         else if (sgm->w >= 4)
 847                 num_fingers = 1;
 848         else if (sgm->w == 0)
 849                 num_fingers = 2;
 850         else if (sgm->w == 1)
 851                 num_fingers = priv->agm_count ? priv->agm_count : 3;
 852         else
 853                 num_fingers = 4;
 854
 855         /* Send resulting input events to user space */
 856         synaptics_report_mt_data(psmouse, sgm, num_fingers);
 857 }
 858
 859 /*
 860  *  called for each full received packet from the touchpad
 861  */
 862 static void synaptics_process_packet(struct psmouse *psmouse)
 863 {
 864         struct input_dev *dev = psmouse->dev;
 865         struct synaptics_data *priv = psmouse->private;
 866         struct synaptics_hw_state hw;
 867         int num_fingers;
 868         int finger_width;
 869
 870         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 871                 return;
 872
 873         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
 874                 synaptics_image_sensor_process(psmouse, &hw);
 875                 return;
 876         }
 877
 878         if (hw.scroll) {
 879                 priv->scroll += hw.scroll;
 880
 881                 while (priv->scroll >= 4) {
 882                         input_report_key(dev, BTN_BACK, !hw.down);
 883                         input_sync(dev);
 884                         input_report_key(dev, BTN_BACK, hw.down);
 885                         input_sync(dev);
 886                         priv->scroll -= 4;
 887                 }
 888                 while (priv->scroll <= -4) {
 889                         input_report_key(dev, BTN_FORWARD, !hw.up);
 890                         input_sync(dev);
 891                         input_report_key(dev, BTN_FORWARD, hw.up);
 892                         input_sync(dev);
 893                         priv->scroll += 4;
 894                 }
 895                 return;
 896         }
 897
 898         if (hw.z > 0 && hw.x > 1) {
 899                 num_fingers = 1;
 900                 finger_width = 5;
 901                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 902                         switch (hw.w) {
 903                         case 0 ... 1:
 904                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 905                                         num_fingers = hw.w + 2;
 906                                 break;
 907                         case 2:
 908                                 if (SYN_MODEL_PEN(priv->model_id))
 909                                         ;   /* Nothing, treat a pen as a single finger */
 910                                 break;
 911                         case 4 ... 15:
 912                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 913                                         finger_width = hw.w;
 914                                 break;
 915                         }
 916                 }
 917         } else {
 918                 num_fingers = 0;
 919                 finger_width = 0;
 920         }
 921
 922         if (cr48_profile_sensor) {
 923                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
 924                 return;
 925         }
 926
 927         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 928                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
 929                                               num_fingers);
 930
 931         /* Post events
 932          * BTN_TOUCH has to be first as mousedev relies on it when doing
 933          * absolute -> relative conversion
 934          */
 935         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 936         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 937
 938         if (num_fingers > 0) {
 939                 input_report_abs(dev, ABS_X, hw.x);
 940                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
 941         }
 942         input_report_abs(dev, ABS_PRESSURE, hw.z);
 943
 944         if (SYN_CAP_PALMDETECT(priv->capabilities))
 945                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 946
 947         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 948         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 949                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 950                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 951         }
 952
 953         synaptics_report_buttons(psmouse, &hw);
 954
 955         input_sync(dev);
 956 }
 957
 958 static int synaptics_validate_byte(struct psmouse *psmouse,
 959                                    int idx, unsigned char pkt_type)
 960 {
 961         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 962         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 963         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 964         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 965         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 966         const char *packet = psmouse->packet;
 967
 968         if (idx < 0 || idx > 4)
 969                 return 0;
 970
 971         switch (pkt_type) {
 972
 973         case SYN_NEWABS:
 974         case SYN_NEWABS_RELAXED:
 975                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 976
 977         case SYN_NEWABS_STRICT:
 978                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 979
 980         case SYN_OLDABS:
 981                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 982
 983         default:
 984                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
 985                 return 0;
 986         }
 987 }
 988
 989 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 990 {
 991         int i;
 992
 993         for (i = 0; i < 5; i++)
 994                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
 995                         psmouse_info(psmouse, "using relaxed packet validation\n");
 996                         return SYN_NEWABS_RELAXED;
 997                 }
 998
 999         return SYN_NEWABS_STRICT;
1000 }
1001
1002 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1003 {
1004         struct synaptics_data *priv = psmouse->private;
1005
1006         if (psmouse->pktcnt >= 6) { /* Full packet received */
1007                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1008                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1009
1010                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1011                     synaptics_is_pt_packet(psmouse->packet)) {
1012                         if (priv->pt_port)
1013                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1014                 } else
1015                         synaptics_process_packet(psmouse);
1016
1017                 return PSMOUSE_FULL_PACKET;
1018         }
1019
1020         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1021                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1022 }
1023
1024 /*****************************************************************************
1025  *      Driver initialization/cleanup functions
1026  ****************************************************************************/
1027 static void set_abs_position_params(struct input_dev *dev,
1028                                     struct synaptics_data *priv, int x_code,
1029                                     int y_code)
1030 {
1031         int x_min = priv->x_min ?: XMIN_NOMINAL;
1032         int x_max = priv->x_max ?: XMAX_NOMINAL;
1033         int y_min = priv->y_min ?: YMIN_NOMINAL;
1034         int y_max = priv->y_max ?: YMAX_NOMINAL;
1035         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1036                         SYN_REDUCED_FILTER_FUZZ : 0;
1037
1038         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1039         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1040         input_abs_set_res(dev, x_code, priv->x_res);
1041         input_abs_set_res(dev, y_code, priv->y_res);
1042 }
1043
1044 static void set_input_params(struct psmouse *psmouse,
1045                              struct synaptics_data *priv)
1046 {
1047         struct input_dev *dev = psmouse->dev;
1048         int i;
1049
1050         /* Things that apply to both modes */
1051         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1052         __set_bit(EV_KEY, dev->evbit);
1053         __set_bit(BTN_LEFT, dev->keybit);
1054         __set_bit(BTN_RIGHT, dev->keybit);
1055
1056         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1057                 __set_bit(BTN_MIDDLE, dev->keybit);
1058
1059         if (!priv->absolute_mode) {
1060                 /* Relative mode */
1061                 __set_bit(EV_REL, dev->evbit);
1062                 __set_bit(REL_X, dev->relbit);
1063                 __set_bit(REL_Y, dev->relbit);
1064                 return;
1065         }
1066
1067         /* Absolute mode */
1068         __set_bit(EV_ABS, dev->evbit);
1069         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1070         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1071
1072         if (cr48_profile_sensor)
1073                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1074
1075         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1076                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1077                                         ABS_MT_POSITION_Y);
1078                 /* Image sensors can report per-contact pressure */
1079                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1080                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1081
1082                 /* Image sensors can signal 4 and 5 finger clicks */
1083                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1084                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1085         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1086                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1087                                         ABS_MT_POSITION_Y);
1088                 /*
1089                  * Profile sensor in CR-48 tracks contacts reasonably well,
1090                  * other non-image sensors with AGM use semi-mt.
1091                  */
1092                 input_mt_init_slots(dev, 2,
1093                                     INPUT_MT_POINTER |
1094                                     (cr48_profile_sensor ?
1095                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1096         }
1097
1098         if (SYN_CAP_PALMDETECT(priv->capabilities))
1099                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1100
1101         __set_bit(BTN_TOUCH, dev->keybit);
1102         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1103
1104         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1105                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1106                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1107         }
1108
1109         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1110             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1111                 __set_bit(BTN_FORWARD, dev->keybit);
1112                 __set_bit(BTN_BACK, dev->keybit);
1113         }
1114
1115         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1116                 __set_bit(BTN_0 + i, dev->keybit);
1117
1118         __clear_bit(EV_REL, dev->evbit);
1119         __clear_bit(REL_X, dev->relbit);
1120         __clear_bit(REL_Y, dev->relbit);
1121
1122         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1123                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1124                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids))
1125                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1126                 /* Clickpads report only left button */
1127                 __clear_bit(BTN_RIGHT, dev->keybit);
1128                 __clear_bit(BTN_MIDDLE, dev->keybit);
1129         }
1130 }
1131
1132 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1133                                               void *data, char *buf)
1134 {
1135         struct synaptics_data *priv = psmouse->private;
1136
1137         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1138 }
1139
1140 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1141                                              void *data, const char *buf,
1142                                              size_t len)
1143 {
1144         struct synaptics_data *priv = psmouse->private;
1145         unsigned int value;
1146         int err;
1147
1148         err = kstrtouint(buf, 10, &value);
1149         if (err)
1150                 return err;
1151
1152         if (value > 1)
1153                 return -EINVAL;
1154
1155         if (value == priv->disable_gesture)
1156                 return len;
1157
1158         priv->disable_gesture = value;
1159         if (value)
1160                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1161         else
1162                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1163
1164         if (synaptics_mode_cmd(psmouse, priv->mode))
1165                 return -EIO;
1166
1167         return len;
1168 }
1169
1170 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1171                     synaptics_show_disable_gesture,
1172                     synaptics_set_disable_gesture);
1173
1174 static void synaptics_disconnect(struct psmouse *psmouse)
1175 {
1176         struct synaptics_data *priv = psmouse->private;
1177
1178         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1179                 device_remove_file(&psmouse->ps2dev.serio->dev,
1180                                    &psmouse_attr_disable_gesture.dattr);
1181
1182         synaptics_reset(psmouse);
1183         kfree(priv);
1184         psmouse->private = NULL;
1185 }
1186
1187 static int synaptics_reconnect(struct psmouse *psmouse)
1188 {
1189         struct synaptics_data *priv = psmouse->private;
1190         struct synaptics_data old_priv = *priv;
1191         unsigned char param[2];
1192         int retry = 0;
1193         int error;
1194
1195         do {
1196                 psmouse_reset(psmouse);
1197                 if (retry) {
1198                         /*
1199                          * On some boxes, right after resuming, the touchpad
1200                          * needs some time to finish initializing (I assume
1201                          * it needs time to calibrate) and start responding
1202                          * to Synaptics-specific queries, so let's wait a
1203                          * bit.
1204                          */
1205                         ssleep(1);
1206                 }
1207                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1208                 error = synaptics_detect(psmouse, 0);
1209         } while (error && ++retry < 3);
1210
1211         if (error)
1212                 return -1;
1213
1214         if (retry > 1)
1215                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1216
1217         if (synaptics_query_hardware(psmouse)) {
1218                 psmouse_err(psmouse, "Unable to query device.\n");
1219                 return -1;
1220         }
1221
1222         if (synaptics_set_mode(psmouse)) {
1223                 psmouse_err(psmouse, "Unable to initialize device.\n");
1224                 return -1;
1225         }
1226
1227         if (old_priv.identity != priv->identity ||
1228             old_priv.model_id != priv->model_id ||
1229             old_priv.capabilities != priv->capabilities ||
1230             old_priv.ext_cap != priv->ext_cap) {
1231                 psmouse_err(psmouse,
1232                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1233                             old_priv.identity, priv->identity,
1234                             old_priv.model_id, priv->model_id,
1235                             old_priv.capabilities, priv->capabilities,
1236                             old_priv.ext_cap, priv->ext_cap);
1237                 return -1;
1238         }
1239
1240         return 0;
1241 }
1242
1243 static bool impaired_toshiba_kbc;
1244
1245 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1246 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1247         {
1248                 /* Toshiba Satellite */
1249                 .matches = {
1250                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1251                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1252                 },
1253         },
1254         {
1255                 /* Toshiba Dynabook */
1256                 .matches = {
1257                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1258                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1259                 },
1260         },
1261         {
1262                 /* Toshiba Portege M300 */
1263                 .matches = {
1264                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1265                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1266                 },
1267
1268         },
1269         {
1270                 /* Toshiba Portege M300 */
1271                 .matches = {
1272                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1273                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1274                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1275                 },
1276
1277         },
1278 #endif
1279         { }
1280 };
1281
1282 static bool broken_olpc_ec;
1283
1284 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1285 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1286         {
1287                 /* OLPC XO-1 or XO-1.5 */
1288                 .matches = {
1289                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1290                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1291                 },
1292         },
1293 #endif
1294         { }
1295 };
1296
1297 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1298 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1299         {
1300                 /* Cr-48 Chromebook (Codename Mario) */
1301                 .matches = {
1302                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1303                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1304                 },
1305         },
1306 #endif
1307         { }
1308 };
1309
1310 static const struct dmi_system_id forcepad_dmi_table[] __initconst = {
1311 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1312         {
1313                 .matches = {
1314                         DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1315                         DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"),
1316                 },
1317         },
1318 #endif
1319         { }
1320 };
1321
1322 void __init synaptics_module_init(void)
1323 {
1324         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1325         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1326         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1327
1328         /*
1329          * Unfortunately ForcePad capability is not exported over PS/2,
1330          * so we have to resort to checking DMI.
1331          */
1332         is_forcepad = dmi_check_system(forcepad_dmi_table);
1333 }
1334
1335 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1336 {
1337         struct synaptics_data *priv;
1338         int err = -1;
1339
1340         /*
1341          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1342          * packet spew overloads the EC such that key presses on the keyboard
1343          * are missed.  Given that, don't even attempt to use Absolute mode.
1344          * Relative mode seems to work just fine.
1345          */
1346         if (absolute_mode && broken_olpc_ec) {
1347                 psmouse_info(psmouse,
1348                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1349                 return -ENODEV;
1350         }
1351
1352         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1353         if (!priv)
1354                 return -ENOMEM;
1355
1356         psmouse_reset(psmouse);
1357
1358         if (synaptics_query_hardware(psmouse)) {
1359                 psmouse_err(psmouse, "Unable to query device.\n");
1360                 goto init_fail;
1361         }
1362
1363         priv->absolute_mode = absolute_mode;
1364         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1365                 priv->disable_gesture = true;
1366
1367         if (synaptics_set_mode(psmouse)) {
1368                 psmouse_err(psmouse, "Unable to initialize device.\n");
1369                 goto init_fail;
1370         }
1371
1372         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1373
1374         psmouse_info(psmouse,
1375                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n",
1376                      SYN_ID_MODEL(priv->identity),
1377                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1378                      priv->model_id,
1379                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c,
1380                      priv->board_id, priv->firmware_id);
1381
1382         set_input_params(psmouse, priv);
1383
1384         /*
1385          * Encode touchpad model so that it can be used to set
1386          * input device->id.version and be visible to userspace.
1387          * Because version is __u16 we have to drop something.
1388          * Hardware info bits seem to be good candidates as they
1389          * are documented to be for Synaptics corp. internal use.
1390          */
1391         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1392                           (priv->model_id & 0x000000ff);
1393
1394         if (absolute_mode) {
1395                 psmouse->protocol_handler = synaptics_process_byte;
1396                 psmouse->pktsize = 6;
1397         } else {
1398                 /* Relative mode follows standard PS/2 mouse protocol */
1399                 psmouse->protocol_handler = psmouse_process_byte;
1400                 psmouse->pktsize = 3;
1401         }
1402
1403         psmouse->set_rate = synaptics_set_rate;
1404         psmouse->disconnect = synaptics_disconnect;
1405         psmouse->reconnect = synaptics_reconnect;
1406         psmouse->cleanup = synaptics_reset;
1407         /* Synaptics can usually stay in sync without extra help */
1408         psmouse->resync_time = 0;
1409
1410         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1411                 synaptics_pt_create(psmouse);
1412
1413         /*
1414          * Toshiba's KBC seems to have trouble handling data from
1415          * Synaptics at full rate.  Switch to a lower rate (roughly
1416          * the same rate as a standard PS/2 mouse).
1417          */
1418         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1419                 psmouse_info(psmouse,
1420                              "Toshiba %s detected, limiting rate to 40pps.\n",
1421                              dmi_get_system_info(DMI_PRODUCT_NAME));
1422                 psmouse->rate = 40;
1423         }
1424
1425         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1426                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1427                                          &psmouse_attr_disable_gesture.dattr);
1428                 if (err) {
1429                         psmouse_err(psmouse,
1430                                     "Failed to create disable_gesture attribute (%d)",
1431                                     err);
1432                         goto init_fail;
1433                 }
1434         }
1435
1436         return 0;
1437
1438  init_fail:
1439         kfree(priv);
1440         return err;
1441 }
1442
1443 int synaptics_init(struct psmouse *psmouse)
1444 {
1445         return __synaptics_init(psmouse, true);
1446 }
1447
1448 int synaptics_init_relative(struct psmouse *psmouse)
1449 {
1450         return __synaptics_init(psmouse, false);
1451 }
1452
1453 bool synaptics_supported(void)
1454 {
1455         return true;
1456 }
1457
1458 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1459
1460 void __init synaptics_module_init(void)
1461 {
1462 }
1463
1464 int synaptics_init(struct psmouse *psmouse)
1465 {
1466         return -ENOSYS;
1467 }
1468
1469 bool synaptics_supported(void)
1470 {
1471         return false;
1472 }
1473
1474 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */