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/rmi.h>
  33 #include <linux/i2c.h>
  34 #include <linux/slab.h>
  35 #include "psmouse.h"
  36 #include "synaptics.h"
  37
  38 /*
  39  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  40  * section 2.3.2, which says that they should be valid regardless of the
  41  * actual size of the sensor.
  42  * Note that newer firmware allows querying device for maximum useable
  43  * coordinates.
  44  */
  45 #define XMIN 0
  46 #define XMAX 6143
  47 #define YMIN 0
  48 #define YMAX 6143
  49 #define XMIN_NOMINAL 1472
  50 #define XMAX_NOMINAL 5472
  51 #define YMIN_NOMINAL 1408
  52 #define YMAX_NOMINAL 4448
  53
  54 /* Size in bits of absolute position values reported by the hardware */
  55 #define ABS_POS_BITS 13
  56
  57 /*
  58  * These values should represent the absolute maximum value that will
  59  * be reported for a positive position value. Some Synaptics firmware
  60  * uses this value to indicate a finger near the edge of the touchpad
  61  * whose precise position cannot be determined.
  62  *
  63  * At least one touchpad is known to report positions in excess of this
  64  * value which are actually negative values truncated to the 13-bit
  65  * reporting range. These values have never been observed to be lower
  66  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  67  * negative and any other value as positive.
  68  */
  69 #define X_MAX_POSITIVE 8176
  70 #define Y_MAX_POSITIVE 8176
  71
  72 /* maximum ABS_MT_POSITION displacement (in mm) */
  73 #define DMAX 10
  74
  75 /*****************************************************************************
  76  *      Stuff we need even when we do not want native Synaptics support
  77  ****************************************************************************/
  78
  79 /*
  80  * Set the synaptics touchpad mode byte by special commands
  81  */
  82 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  83 {
  84         unsigned char param[1];
  85
  86         if (psmouse_sliced_command(psmouse, mode))
  87                 return -1;
  88         param[0] = SYN_PS_SET_MODE2;
  89         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  90                 return -1;
  91         return 0;
  92 }
  93
  94 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  95 {
  96         struct ps2dev *ps2dev = &psmouse->ps2dev;
  97         unsigned char param[4];
  98
  99         param[0] = 0;
 100
 101         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 102         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 103         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 104         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 105         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 106
 107         if (param[1] != 0x47)
 108                 return -ENODEV;
 109
 110         if (set_properties) {
 111                 psmouse->vendor = "Synaptics";
 112                 psmouse->name = "TouchPad";
 113         }
 114
 115         return 0;
 116 }
 117
 118 void synaptics_reset(struct psmouse *psmouse)
 119 {
 120         /* reset touchpad back to relative mode, gestures enabled */
 121         synaptics_mode_cmd(psmouse, 0);
 122 }
 123
 124 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
 125     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
 126
 127 /* This list has been kindly provided by Synaptics. */
 128 static const char * const topbuttonpad_pnp_ids[] = {
 129         "LEN0017",
 130         "LEN0018",
 131         "LEN0019",
 132         "LEN0023",
 133         "LEN002A",
 134         "LEN002B",
 135         "LEN002C",
 136         "LEN002D",
 137         "LEN002E",
 138         "LEN0033", /* Helix */
 139         "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */
 140         "LEN0035", /* X240 */
 141         "LEN0036", /* T440 */
 142         "LEN0037", /* X1 Carbon 2nd */
 143         "LEN0038",
 144         "LEN0039", /* T440s */
 145         "LEN0041",
 146         "LEN0042", /* Yoga */
 147         "LEN0045",
 148         "LEN0047",
 149         "LEN0049",
 150         "LEN2000", /* S540 */
 151         "LEN2001", /* Edge E431 */
 152         "LEN2002", /* Edge E531 */
 153         "LEN2003",
 154         "LEN2004", /* L440 */
 155         "LEN2005",
 156         "LEN2006", /* Edge E440/E540 */
 157         "LEN2007",
 158         "LEN2008",
 159         "LEN2009",
 160         "LEN200A",
 161         "LEN200B",
 162         NULL
 163 };
 164
 165 static const char * const smbus_pnp_ids[] = {
 166         /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
 167         "LEN0048", /* X1 Carbon 3 */
 168         "LEN0046", /* X250 */
 169         "LEN004a", /* W541 */
 170         "LEN200f", /* T450s */
 171         NULL
 172 };
 173
 174 /*
 175  * Send a command to the synpatics touchpad by special commands
 176  */
 177 static int synaptics_send_cmd(struct psmouse *psmouse,
 178                               unsigned char c, unsigned char *param)
 179 {
 180         int error;
 181
 182         error = psmouse_sliced_command(psmouse, c);
 183         if (error)
 184                 return error;
 185
 186         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 187         if (error)
 188                 return error;
 189
 190         return 0;
 191 }
 192
 193 /*
 194  * Identify Touchpad
 195  * See also the SYN_ID_* macros
 196  */
 197 static int synaptics_identify(struct psmouse *psmouse,
 198                               struct synaptics_device_info *info)
 199 {
 200         unsigned char id[3];
 201         int error;
 202
 203         error = synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id);
 204         if (error)
 205                 return error;
 206
 207         info->identity = (id[0] << 16) | (id[1] << 8) | id[2];
 208         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 209 }
 210
 211 /*
 212  * Read the model-id bytes from the touchpad
 213  * see also SYN_MODEL_* macros
 214  */
 215 static int synaptics_model_id(struct psmouse *psmouse,
 216                               struct synaptics_device_info *info)
 217 {
 218         unsigned char mi[3];
 219         int error;
 220
 221         error = synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi);
 222         if (error)
 223                 return error;
 224
 225         info->model_id = (mi[0] << 16) | (mi[1] << 8) | mi[2];
 226         return 0;
 227 }
 228
 229 /*
 230  * Read the firmware id from the touchpad
 231  */
 232 static int synaptics_firmware_id(struct psmouse *psmouse,
 233                                  struct synaptics_device_info *info)
 234 {
 235         unsigned char fwid[3];
 236         int error;
 237
 238         error = synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid);
 239         if (error)
 240                 return error;
 241
 242         info->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2];
 243         return 0;
 244 }
 245
 246 static int synaptics_more_extended_queries(struct psmouse *psmouse,
 247                                            struct synaptics_device_info *info)
 248 {
 249         unsigned char buf[3];
 250         int error;
 251
 252         error = synaptics_send_cmd(psmouse, SYN_QUE_MEXT_CAPAB_10, buf);
 253         if (error)
 254                 return error;
 255
 256         info->ext_cap_10 = (buf[0] << 16) | (buf[1] << 8) | buf[2];
 257         return 0;
 258 }
 259
 260 /*
 261  * Read the board id and the "More Extended Queries" from the touchpad
 262  * The board id is encoded in the "QUERY MODES" response
 263  */
 264 static int synaptics_query_modes(struct psmouse *psmouse,
 265                                  struct synaptics_device_info *info)
 266 {
 267         unsigned char bid[3];
 268         int error;
 269
 270         /* firmwares prior 7.5 have no board_id encoded */
 271         if (SYN_ID_FULL(info->identity) < 0x705)
 272                 return 0;
 273
 274         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 275         if (error)
 276                 return error;
 277
 278         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 279
 280         if (SYN_MEXT_CAP_BIT(bid[0]))
 281                 return synaptics_more_extended_queries(psmouse, info);
 282
 283         return 0;
 284 }
 285
 286 /*
 287  * Read the capability-bits from the touchpad
 288  * see also the SYN_CAP_* macros
 289  */
 290 static int synaptics_capability(struct psmouse *psmouse,
 291                                 struct synaptics_device_info *info)
 292 {
 293         unsigned char cap[3];
 294         int error;
 295
 296         error = synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap);
 297         if (error)
 298                 return error;
 299
 300         info->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 301         info->ext_cap = info->ext_cap_0c = 0;
 302
 303         /*
 304          * Older firmwares had submodel ID fixed to 0x47
 305          */
 306         if (SYN_ID_FULL(info->identity) < 0x705 &&
 307             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 308                 return -ENXIO;
 309         }
 310
 311         /*
 312          * Unless capExtended is set the rest of the flags should be ignored
 313          */
 314         if (!SYN_CAP_EXTENDED(info->capabilities))
 315                 info->capabilities = 0;
 316
 317         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 318                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 319                         psmouse_warn(psmouse,
 320                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 321                 } else {
 322                         info->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 323
 324                         /*
 325                          * if nExtBtn is greater than 8 it should be considered
 326                          * invalid and treated as 0
 327                          */
 328                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 329                                 info->ext_cap &= 0xff0fff;
 330                 }
 331         }
 332
 333         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 334                 error = synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap);
 335                 if (error)
 336                         psmouse_warn(psmouse,
 337                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 338                 else
 339                         info->ext_cap_0c =
 340                                 (cap[0] << 16) | (cap[1] << 8) | cap[2];
 341         }
 342
 343         return 0;
 344 }
 345
 346 /*
 347  * Read touchpad resolution and maximum reported coordinates
 348  * Resolution is left zero if touchpad does not support the query
 349  */
 350 static int synaptics_resolution(struct psmouse *psmouse,
 351                                 struct synaptics_device_info *info)
 352 {
 353         unsigned char resp[3];
 354         int error;
 355
 356         if (SYN_ID_MAJOR(info->identity) < 4)
 357                 return 0;
 358
 359         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 360         if (!error) {
 361                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 362                         info->x_res = resp[0]; /* x resolution in units/mm */
 363                         info->y_res = resp[2]; /* y resolution in units/mm */
 364                 }
 365         }
 366
 367         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 368             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 369                 error = synaptics_send_cmd(psmouse,
 370                                            SYN_QUE_EXT_MAX_COORDS, resp);
 371                 if (error) {
 372                         psmouse_warn(psmouse,
 373                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 374                 } else {
 375                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 376                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 377                         psmouse_info(psmouse,
 378                                      "queried max coordinates: x [..%d], y [..%d]\n",
 379                                      info->x_max, info->y_max);
 380                 }
 381         }
 382
 383         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 384             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 385              /*
 386               * Firmware v8.1 does not report proper number of extended
 387               * capabilities, but has been proven to report correct min
 388               * coordinates.
 389               */
 390              SYN_ID_FULL(info->identity) == 0x801)) {
 391                 error = synaptics_send_cmd(psmouse,
 392                                            SYN_QUE_EXT_MIN_COORDS, resp);
 393                 if (error) {
 394                         psmouse_warn(psmouse,
 395                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 396                 } else {
 397                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 398                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 399                         psmouse_info(psmouse,
 400                                      "queried min coordinates: x [%d..], y [%d..]\n",
 401                                      info->x_min, info->y_min);
 402                 }
 403         }
 404
 405         return 0;
 406 }
 407
 408 static int synaptics_query_hardware(struct psmouse *psmouse,
 409                                     struct synaptics_device_info *info)
 410 {
 411         int error;
 412
 413         error = synaptics_identify(psmouse, info);
 414         if (error)
 415                 return error;
 416
 417         error = synaptics_model_id(psmouse, info);
 418         if (error)
 419                 return error;
 420
 421         error = synaptics_firmware_id(psmouse, info);
 422         if (error)
 423                 return error;
 424
 425         error = synaptics_query_modes(psmouse, info);
 426         if (error)
 427                 return error;
 428
 429         error = synaptics_capability(psmouse, info);
 430         if (error)
 431                 return error;
 432
 433         error = synaptics_resolution(psmouse, info);
 434         if (error)
 435                 return error;
 436
 437         return 0;
 438 }
 439
 440 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 441
 442 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 443
 444 static bool cr48_profile_sensor;
 445
 446 #define ANY_BOARD_ID 0
 447 struct min_max_quirk {
 448         const char * const *pnp_ids;
 449         struct {
 450                 u32 min, max;
 451         } board_id;
 452         u32 x_min, x_max, y_min, y_max;
 453 };
 454
 455 static const struct min_max_quirk min_max_pnpid_table[] = {
 456         {
 457                 (const char * const []){"LEN0033", NULL},
 458                 {ANY_BOARD_ID, ANY_BOARD_ID},
 459                 1024, 5052, 2258, 4832
 460         },
 461         {
 462                 (const char * const []){"LEN0042", NULL},
 463                 {ANY_BOARD_ID, ANY_BOARD_ID},
 464                 1232, 5710, 1156, 4696
 465         },
 466         {
 467                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 468                                         "LEN0039", "LEN2002", "LEN2004",
 469                                         NULL},
 470                 {ANY_BOARD_ID, 2961},
 471                 1024, 5112, 2024, 4832
 472         },
 473         {
 474                 (const char * const []){"LEN2000", NULL},
 475                 {ANY_BOARD_ID, ANY_BOARD_ID},
 476                 1024, 5113, 2021, 4832
 477         },
 478         {
 479                 (const char * const []){"LEN2001", NULL},
 480                 {ANY_BOARD_ID, ANY_BOARD_ID},
 481                 1024, 5022, 2508, 4832
 482         },
 483         {
 484                 (const char * const []){"LEN2006", NULL},
 485                 {2691, 2691},
 486                 1024, 5045, 2457, 4832
 487         },
 488         {
 489                 (const char * const []){"LEN2006", NULL},
 490                 {ANY_BOARD_ID, ANY_BOARD_ID},
 491                 1264, 5675, 1171, 4688
 492         },
 493         { }
 494 };
 495
 496 /* This list has been kindly provided by Synaptics. */
 497 static const char * const forcepad_pnp_ids[] = {
 498         "SYN300D",
 499         "SYN3014",
 500         NULL
 501 };
 502
 503 /*****************************************************************************
 504  *      Synaptics communications functions
 505  ****************************************************************************/
 506
 507 /*
 508  * Synaptics touchpads report the y coordinate from bottom to top, which is
 509  * opposite from what userspace expects.
 510  * This function is used to invert y before reporting.
 511  */
 512 static int synaptics_invert_y(int y)
 513 {
 514         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 515 }
 516
 517 /*
 518  * Apply quirk(s) if the hardware matches
 519  */
 520 static void synaptics_apply_quirks(struct psmouse *psmouse,
 521                                    struct synaptics_device_info *info)
 522 {
 523         int i;
 524
 525         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 526                 if (!psmouse_matches_pnp_id(psmouse,
 527                                             min_max_pnpid_table[i].pnp_ids))
 528                         continue;
 529
 530                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 531                     info->board_id < min_max_pnpid_table[i].board_id.min)
 532                         continue;
 533
 534                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 535                     info->board_id > min_max_pnpid_table[i].board_id.max)
 536                         continue;
 537
 538                 info->x_min = min_max_pnpid_table[i].x_min;
 539                 info->x_max = min_max_pnpid_table[i].x_max;
 540                 info->y_min = min_max_pnpid_table[i].y_min;
 541                 info->y_max = min_max_pnpid_table[i].y_max;
 542                 psmouse_info(psmouse,
 543                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 544                              info->x_min, info->x_max,
 545                              info->y_min, info->y_max);
 546                 break;
 547         }
 548 }
 549
 550 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 551 {
 552         static unsigned char param = 0xc8;
 553         struct synaptics_data *priv = psmouse->private;
 554
 555         if (!(SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 556               SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)))
 557                 return 0;
 558
 559         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 560                 return -1;
 561
 562         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 563                 return -1;
 564
 565         /* Advanced gesture mode also sends multi finger data */
 566         priv->info.capabilities |= BIT(1);
 567
 568         return 0;
 569 }
 570
 571 static int synaptics_set_mode(struct psmouse *psmouse)
 572 {
 573         struct synaptics_data *priv = psmouse->private;
 574
 575         priv->mode = 0;
 576         if (priv->absolute_mode)
 577                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 578         if (priv->disable_gesture)
 579                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 580         if (psmouse->rate >= 80)
 581                 priv->mode |= SYN_BIT_HIGH_RATE;
 582         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 583                 priv->mode |= SYN_BIT_W_MODE;
 584
 585         if (synaptics_mode_cmd(psmouse, priv->mode))
 586                 return -1;
 587
 588         if (priv->absolute_mode &&
 589             synaptics_set_advanced_gesture_mode(psmouse)) {
 590                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 591                 return -1;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 598 {
 599         struct synaptics_data *priv = psmouse->private;
 600
 601         if (rate >= 80) {
 602                 priv->mode |= SYN_BIT_HIGH_RATE;
 603                 psmouse->rate = 80;
 604         } else {
 605                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 606                 psmouse->rate = 40;
 607         }
 608
 609         synaptics_mode_cmd(psmouse, priv->mode);
 610 }
 611
 612 /*****************************************************************************
 613  *      Synaptics pass-through PS/2 port support
 614  ****************************************************************************/
 615 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 616 {
 617         struct psmouse *parent = serio_get_drvdata(serio->parent);
 618         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 619
 620         if (psmouse_sliced_command(parent, c))
 621                 return -1;
 622         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 623                 return -1;
 624         return 0;
 625 }
 626
 627 static int synaptics_pt_start(struct serio *serio)
 628 {
 629         struct psmouse *parent = serio_get_drvdata(serio->parent);
 630         struct synaptics_data *priv = parent->private;
 631
 632         serio_pause_rx(parent->ps2dev.serio);
 633         priv->pt_port = serio;
 634         serio_continue_rx(parent->ps2dev.serio);
 635
 636         return 0;
 637 }
 638
 639 static void synaptics_pt_stop(struct serio *serio)
 640 {
 641         struct psmouse *parent = serio_get_drvdata(serio->parent);
 642         struct synaptics_data *priv = parent->private;
 643
 644         serio_pause_rx(parent->ps2dev.serio);
 645         priv->pt_port = NULL;
 646         serio_continue_rx(parent->ps2dev.serio);
 647 }
 648
 649 static int synaptics_is_pt_packet(unsigned char *buf)
 650 {
 651         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 652 }
 653
 654 static void synaptics_pass_pt_packet(struct serio *ptport,
 655                                      unsigned char *packet)
 656 {
 657         struct psmouse *child = serio_get_drvdata(ptport);
 658
 659         if (child && child->state == PSMOUSE_ACTIVATED) {
 660                 serio_interrupt(ptport, packet[1], 0);
 661                 serio_interrupt(ptport, packet[4], 0);
 662                 serio_interrupt(ptport, packet[5], 0);
 663                 if (child->pktsize == 4)
 664                         serio_interrupt(ptport, packet[2], 0);
 665         } else {
 666                 serio_interrupt(ptport, packet[1], 0);
 667         }
 668 }
 669
 670 static void synaptics_pt_activate(struct psmouse *psmouse)
 671 {
 672         struct synaptics_data *priv = psmouse->private;
 673         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 674
 675         /* adjust the touchpad to child's choice of protocol */
 676         if (child) {
 677                 if (child->pktsize == 4)
 678                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 679                 else
 680                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 681
 682                 if (synaptics_mode_cmd(psmouse, priv->mode))
 683                         psmouse_warn(psmouse,
 684                                      "failed to switch guest protocol\n");
 685         }
 686 }
 687
 688 static void synaptics_pt_create(struct psmouse *psmouse)
 689 {
 690         struct serio *serio;
 691
 692         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 693         if (!serio) {
 694                 psmouse_err(psmouse,
 695                             "not enough memory for pass-through port\n");
 696                 return;
 697         }
 698
 699         serio->id.type = SERIO_PS_PSTHRU;
 700         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 701         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 702         serio->write = synaptics_pt_write;
 703         serio->start = synaptics_pt_start;
 704         serio->stop = synaptics_pt_stop;
 705         serio->parent = psmouse->ps2dev.serio;
 706
 707         psmouse->pt_activate = synaptics_pt_activate;
 708
 709         psmouse_info(psmouse, "serio: %s port at %s\n",
 710                      serio->name, psmouse->phys);
 711         serio_register_port(serio);
 712 }
 713
 714 /*****************************************************************************
 715  *      Functions to interpret the absolute mode packets
 716  ****************************************************************************/
 717
 718 static void synaptics_parse_agm(const unsigned char buf[],
 719                                 struct synaptics_data *priv,
 720                                 struct synaptics_hw_state *hw)
 721 {
 722         struct synaptics_hw_state *agm = &priv->agm;
 723         int agm_packet_type;
 724
 725         agm_packet_type = (buf[5] & 0x30) >> 4;
 726         switch (agm_packet_type) {
 727         case 1:
 728                 /* Gesture packet: (x, y, z) half resolution */
 729                 agm->w = hw->w;
 730                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 731                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 732                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 733                 break;
 734
 735         case 2:
 736                 /* AGM-CONTACT packet: we are only interested in the count */
 737                 priv->agm_count = buf[1];
 738                 break;
 739
 740         default:
 741                 break;
 742         }
 743 }
 744
 745 static void synaptics_parse_ext_buttons(const unsigned char buf[],
 746                                         struct synaptics_data *priv,
 747                                         struct synaptics_hw_state *hw)
 748 {
 749         unsigned int ext_bits =
 750                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 751         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 752
 753         hw->ext_buttons = buf[4] & ext_mask;
 754         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 755 }
 756
 757 static int synaptics_parse_hw_state(const unsigned char buf[],
 758                                     struct synaptics_data *priv,
 759                                     struct synaptics_hw_state *hw)
 760 {
 761         memset(hw, 0, sizeof(struct synaptics_hw_state));
 762
 763         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 764                 hw->w = (((buf[0] & 0x30) >> 2) |
 765                          ((buf[0] & 0x04) >> 1) |
 766                          ((buf[3] & 0x04) >> 2));
 767
 768                 if ((SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 769                         SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)) &&
 770                     hw->w == 2) {
 771                         synaptics_parse_agm(buf, priv, hw);
 772                         return 1;
 773                 }
 774
 775                 hw->x = (((buf[3] & 0x10) << 8) |
 776                          ((buf[1] & 0x0f) << 8) |
 777                          buf[4]);
 778                 hw->y = (((buf[3] & 0x20) << 7) |
 779                          ((buf[1] & 0xf0) << 4) |
 780                          buf[5]);
 781                 hw->z = buf[2];
 782
 783                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 784                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 785
 786                 if (priv->is_forcepad) {
 787                         /*
 788                          * ForcePads, like Clickpads, use middle button
 789                          * bits to report primary button clicks.
 790                          * Unfortunately they report primary button not
 791                          * only when user presses on the pad above certain
 792                          * threshold, but also when there are more than one
 793                          * finger on the touchpad, which interferes with
 794                          * out multi-finger gestures.
 795                          */
 796                         if (hw->z == 0) {
 797                                 /* No contacts */
 798                                 priv->press = priv->report_press = false;
 799                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 800                                 /*
 801                                  * Single-finger touch with pressure above
 802                                  * the threshold. If pressure stays long
 803                                  * enough, we'll start reporting primary
 804                                  * button. We rely on the device continuing
 805                                  * sending data even if finger does not
 806                                  * move.
 807                                  */
 808                                 if  (!priv->press) {
 809                                         priv->press_start = jiffies;
 810                                         priv->press = true;
 811                                 } else if (time_after(jiffies,
 812                                                 priv->press_start +
 813                                                         msecs_to_jiffies(50))) {
 814                                         priv->report_press = true;
 815                                 }
 816                         } else {
 817                                 priv->press = false;
 818                         }
 819
 820                         hw->left = priv->report_press;
 821
 822                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 823                         /*
 824                          * Clickpad's button is transmitted as middle button,
 825                          * however, since it is primary button, we will report
 826                          * it as BTN_LEFT.
 827                          */
 828                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 829
 830                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 831                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 832                         if (hw->w == 2)
 833                                 hw->scroll = (signed char)(buf[1]);
 834                 }
 835
 836                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 837                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 838                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 839                 }
 840
 841                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 842                     ((buf[0] ^ buf[3]) & 0x02)) {
 843                         synaptics_parse_ext_buttons(buf, priv, hw);
 844                 }
 845         } else {
 846                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 847                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 848
 849                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 850                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 851
 852                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 853                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 854         }
 855
 856         /*
 857          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 858          * is used by some firmware to indicate a finger at the edge of
 859          * the touchpad whose precise position cannot be determined, so
 860          * convert these values to the maximum axis value.
 861          */
 862         if (hw->x > X_MAX_POSITIVE)
 863                 hw->x -= 1 << ABS_POS_BITS;
 864         else if (hw->x == X_MAX_POSITIVE)
 865                 hw->x = XMAX;
 866
 867         if (hw->y > Y_MAX_POSITIVE)
 868                 hw->y -= 1 << ABS_POS_BITS;
 869         else if (hw->y == Y_MAX_POSITIVE)
 870                 hw->y = YMAX;
 871
 872         return 0;
 873 }
 874
 875 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 876                                           bool active, int x, int y)
 877 {
 878         input_mt_slot(dev, slot);
 879         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 880         if (active) {
 881                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 882                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 883         }
 884 }
 885
 886 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 887                                           const struct synaptics_hw_state *a,
 888                                           const struct synaptics_hw_state *b,
 889                                           int num_fingers)
 890 {
 891         if (num_fingers >= 2) {
 892                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 893                                               min(a->y, b->y));
 894                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 895                                               max(a->y, b->y));
 896         } else if (num_fingers == 1) {
 897                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 898                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 899         } else {
 900                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 901                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 902         }
 903 }
 904
 905 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 906                                          const struct synaptics_hw_state *hw)
 907 {
 908         struct input_dev *dev = psmouse->dev;
 909         struct synaptics_data *priv = psmouse->private;
 910         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 911         int i;
 912
 913         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 914                 return;
 915
 916         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 917         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 918              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 919             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 920                 return;
 921
 922         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 923                 for (i = 0; i < ext_bits; i++) {
 924                         input_report_key(dev, BTN_0 + 2 * i,
 925                                 hw->ext_buttons & (1 << i));
 926                         input_report_key(dev, BTN_1 + 2 * i,
 927                                 hw->ext_buttons & (1 << (i + ext_bits)));
 928                 }
 929                 return;
 930         }
 931
 932         /*
 933          * This generation of touchpads has the trackstick buttons
 934          * physically wired to the touchpad. Re-route them through
 935          * the pass-through interface.
 936          */
 937         if (priv->pt_port) {
 938                 u8 pt_buttons;
 939
 940                 /* The trackstick expects at most 3 buttons */
 941                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 942                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 943                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 944
 945                 serio_interrupt(priv->pt_port,
 946                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 947                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 948         }
 949 }
 950
 951 static void synaptics_report_buttons(struct psmouse *psmouse,
 952                                      const struct synaptics_hw_state *hw)
 953 {
 954         struct input_dev *dev = psmouse->dev;
 955         struct synaptics_data *priv = psmouse->private;
 956
 957         input_report_key(dev, BTN_LEFT, hw->left);
 958         input_report_key(dev, BTN_RIGHT, hw->right);
 959
 960         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 961                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 962
 963         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 964                 input_report_key(dev, BTN_FORWARD, hw->up);
 965                 input_report_key(dev, BTN_BACK, hw->down);
 966         }
 967
 968         synaptics_report_ext_buttons(psmouse, hw);
 969 }
 970
 971 static void synaptics_report_mt_data(struct psmouse *psmouse,
 972                                      const struct synaptics_hw_state *sgm,
 973                                      int num_fingers)
 974 {
 975         struct input_dev *dev = psmouse->dev;
 976         struct synaptics_data *priv = psmouse->private;
 977         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 978         struct input_mt_pos pos[2];
 979         int slot[2], nsemi, i;
 980
 981         nsemi = clamp_val(num_fingers, 0, 2);
 982
 983         for (i = 0; i < nsemi; i++) {
 984                 pos[i].x = hw[i]->x;
 985                 pos[i].y = synaptics_invert_y(hw[i]->y);
 986         }
 987
 988         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
 989
 990         for (i = 0; i < nsemi; i++) {
 991                 input_mt_slot(dev, slot[i]);
 992                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
 993                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
 994                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
 995                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
 996         }
 997
 998         input_mt_drop_unused(dev);
 999
1000         /* Don't use active slot count to generate BTN_TOOL events. */
1001         input_mt_report_pointer_emulation(dev, false);
1002
1003         /* Send the number of fingers reported by touchpad itself. */
1004         input_mt_report_finger_count(dev, num_fingers);
1005
1006         synaptics_report_buttons(psmouse, sgm);
1007
1008         input_sync(dev);
1009 }
1010
1011 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1012                                            struct synaptics_hw_state *sgm)
1013 {
1014         struct synaptics_data *priv = psmouse->private;
1015         int num_fingers;
1016
1017         /*
1018          * Update mt_state using the new finger count and current mt_state.
1019          */
1020         if (sgm->z == 0)
1021                 num_fingers = 0;
1022         else if (sgm->w >= 4)
1023                 num_fingers = 1;
1024         else if (sgm->w == 0)
1025                 num_fingers = 2;
1026         else if (sgm->w == 1)
1027                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1028         else
1029                 num_fingers = 4;
1030
1031         /* Send resulting input events to user space */
1032         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1033 }
1034
1035 /*
1036  *  called for each full received packet from the touchpad
1037  */
1038 static void synaptics_process_packet(struct psmouse *psmouse)
1039 {
1040         struct input_dev *dev = psmouse->dev;
1041         struct synaptics_data *priv = psmouse->private;
1042         struct synaptics_device_info *info = &priv->info;
1043         struct synaptics_hw_state hw;
1044         int num_fingers;
1045         int finger_width;
1046
1047         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1048                 return;
1049
1050         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1051                 synaptics_image_sensor_process(psmouse, &hw);
1052                 return;
1053         }
1054
1055         if (hw.scroll) {
1056                 priv->scroll += hw.scroll;
1057
1058                 while (priv->scroll >= 4) {
1059                         input_report_key(dev, BTN_BACK, !hw.down);
1060                         input_sync(dev);
1061                         input_report_key(dev, BTN_BACK, hw.down);
1062                         input_sync(dev);
1063                         priv->scroll -= 4;
1064                 }
1065                 while (priv->scroll <= -4) {
1066                         input_report_key(dev, BTN_FORWARD, !hw.up);
1067                         input_sync(dev);
1068                         input_report_key(dev, BTN_FORWARD, hw.up);
1069                         input_sync(dev);
1070                         priv->scroll += 4;
1071                 }
1072                 return;
1073         }
1074
1075         if (hw.z > 0 && hw.x > 1) {
1076                 num_fingers = 1;
1077                 finger_width = 5;
1078                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1079                         switch (hw.w) {
1080                         case 0 ... 1:
1081                                 if (SYN_CAP_MULTIFINGER(info->capabilities))
1082                                         num_fingers = hw.w + 2;
1083                                 break;
1084                         case 2:
1085                                 if (SYN_MODEL_PEN(info->model_id))
1086                                         ;   /* Nothing, treat a pen as a single finger */
1087                                 break;
1088                         case 4 ... 15:
1089                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1090                                         finger_width = hw.w;
1091                                 break;
1092                         }
1093                 }
1094         } else {
1095                 num_fingers = 0;
1096                 finger_width = 0;
1097         }
1098
1099         if (cr48_profile_sensor) {
1100                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1101                 return;
1102         }
1103
1104         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1105                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1106                                               num_fingers);
1107
1108         /* Post events
1109          * BTN_TOUCH has to be first as mousedev relies on it when doing
1110          * absolute -> relative conversion
1111          */
1112         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1113         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1114
1115         if (num_fingers > 0) {
1116                 input_report_abs(dev, ABS_X, hw.x);
1117                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1118         }
1119         input_report_abs(dev, ABS_PRESSURE, hw.z);
1120
1121         if (SYN_CAP_PALMDETECT(info->capabilities))
1122                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1123
1124         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1125         if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1126                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1127                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1128         }
1129
1130         synaptics_report_buttons(psmouse, &hw);
1131
1132         input_sync(dev);
1133 }
1134
1135 static int synaptics_validate_byte(struct psmouse *psmouse,
1136                                    int idx, unsigned char pkt_type)
1137 {
1138         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1139         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1140         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1141         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1142         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1143         const char *packet = psmouse->packet;
1144
1145         if (idx < 0 || idx > 4)
1146                 return 0;
1147
1148         switch (pkt_type) {
1149
1150         case SYN_NEWABS:
1151         case SYN_NEWABS_RELAXED:
1152                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1153
1154         case SYN_NEWABS_STRICT:
1155                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1156
1157         case SYN_OLDABS:
1158                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1159
1160         default:
1161                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1162                 return 0;
1163         }
1164 }
1165
1166 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1167 {
1168         int i;
1169
1170         for (i = 0; i < 5; i++)
1171                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1172                         psmouse_info(psmouse, "using relaxed packet validation\n");
1173                         return SYN_NEWABS_RELAXED;
1174                 }
1175
1176         return SYN_NEWABS_STRICT;
1177 }
1178
1179 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1180 {
1181         struct synaptics_data *priv = psmouse->private;
1182
1183         if (psmouse->pktcnt >= 6) { /* Full packet received */
1184                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1185                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1186
1187                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1188                     synaptics_is_pt_packet(psmouse->packet)) {
1189                         if (priv->pt_port)
1190                                 synaptics_pass_pt_packet(priv->pt_port,
1191                                                          psmouse->packet);
1192                 } else
1193                         synaptics_process_packet(psmouse);
1194
1195                 return PSMOUSE_FULL_PACKET;
1196         }
1197
1198         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1199                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1200 }
1201
1202 /*****************************************************************************
1203  *      Driver initialization/cleanup functions
1204  ****************************************************************************/
1205 static void set_abs_position_params(struct input_dev *dev,
1206                                     struct synaptics_device_info *info,
1207                                     int x_code, int y_code)
1208 {
1209         int x_min = info->x_min ?: XMIN_NOMINAL;
1210         int x_max = info->x_max ?: XMAX_NOMINAL;
1211         int y_min = info->y_min ?: YMIN_NOMINAL;
1212         int y_max = info->y_max ?: YMAX_NOMINAL;
1213         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1214                         SYN_REDUCED_FILTER_FUZZ : 0;
1215
1216         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1217         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1218         input_abs_set_res(dev, x_code, info->x_res);
1219         input_abs_set_res(dev, y_code, info->y_res);
1220 }
1221
1222 static void set_input_params(struct psmouse *psmouse,
1223                              struct synaptics_data *priv)
1224 {
1225         struct input_dev *dev = psmouse->dev;
1226         struct synaptics_device_info *info = &priv->info;
1227         int i;
1228
1229         /* Things that apply to both modes */
1230         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1231         __set_bit(EV_KEY, dev->evbit);
1232         __set_bit(BTN_LEFT, dev->keybit);
1233         __set_bit(BTN_RIGHT, dev->keybit);
1234
1235         if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1236                 __set_bit(BTN_MIDDLE, dev->keybit);
1237
1238         if (!priv->absolute_mode) {
1239                 /* Relative mode */
1240                 __set_bit(EV_REL, dev->evbit);
1241                 __set_bit(REL_X, dev->relbit);
1242                 __set_bit(REL_Y, dev->relbit);
1243                 return;
1244         }
1245
1246         /* Absolute mode */
1247         __set_bit(EV_ABS, dev->evbit);
1248         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1249         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1250
1251         if (cr48_profile_sensor)
1252                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1253
1254         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1255                 set_abs_position_params(dev, info,
1256                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1257                 /* Image sensors can report per-contact pressure */
1258                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1259                 input_mt_init_slots(dev, 2, INPUT_MT_POINTER | INPUT_MT_TRACK);
1260
1261                 /* Image sensors can signal 4 and 5 finger clicks */
1262                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1263                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1264         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1265                 set_abs_position_params(dev, info,
1266                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1267                 /*
1268                  * Profile sensor in CR-48 tracks contacts reasonably well,
1269                  * other non-image sensors with AGM use semi-mt.
1270                  */
1271                 input_mt_init_slots(dev, 2,
1272                                     INPUT_MT_POINTER |
1273                                     (cr48_profile_sensor ?
1274                                         INPUT_MT_TRACK : INPUT_MT_SEMI_MT));
1275         }
1276
1277         if (SYN_CAP_PALMDETECT(info->capabilities))
1278                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1279
1280         __set_bit(BTN_TOUCH, dev->keybit);
1281         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1282
1283         if (SYN_CAP_MULTIFINGER(info->capabilities)) {
1284                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1285                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1286         }
1287
1288         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1289             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1290                 __set_bit(BTN_FORWARD, dev->keybit);
1291                 __set_bit(BTN_BACK, dev->keybit);
1292         }
1293
1294         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1295                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1296                         __set_bit(BTN_0 + i, dev->keybit);
1297
1298         __clear_bit(EV_REL, dev->evbit);
1299         __clear_bit(REL_X, dev->relbit);
1300         __clear_bit(REL_Y, dev->relbit);
1301
1302         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1303                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1304                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1305                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1306                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1307                 /* Clickpads report only left button */
1308                 __clear_bit(BTN_RIGHT, dev->keybit);
1309                 __clear_bit(BTN_MIDDLE, dev->keybit);
1310         }
1311 }
1312
1313 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1314                                               void *data, char *buf)
1315 {
1316         struct synaptics_data *priv = psmouse->private;
1317
1318         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1319 }
1320
1321 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1322                                              void *data, const char *buf,
1323                                              size_t len)
1324 {
1325         struct synaptics_data *priv = psmouse->private;
1326         unsigned int value;
1327         int err;
1328
1329         err = kstrtouint(buf, 10, &value);
1330         if (err)
1331                 return err;
1332
1333         if (value > 1)
1334                 return -EINVAL;
1335
1336         if (value == priv->disable_gesture)
1337                 return len;
1338
1339         priv->disable_gesture = value;
1340         if (value)
1341                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1342         else
1343                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1344
1345         if (synaptics_mode_cmd(psmouse, priv->mode))
1346                 return -EIO;
1347
1348         return len;
1349 }
1350
1351 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1352                     synaptics_show_disable_gesture,
1353                     synaptics_set_disable_gesture);
1354
1355 static void synaptics_disconnect(struct psmouse *psmouse)
1356 {
1357         struct synaptics_data *priv = psmouse->private;
1358
1359         /*
1360          * We might have left a breadcrumb when trying to
1361          * set up SMbus companion.
1362          */
1363         psmouse_smbus_cleanup(psmouse);
1364
1365         if (!priv->absolute_mode &&
1366                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1367                 device_remove_file(&psmouse->ps2dev.serio->dev,
1368                                    &psmouse_attr_disable_gesture.dattr);
1369
1370         synaptics_reset(psmouse);
1371         kfree(priv);
1372         psmouse->private = NULL;
1373 }
1374
1375 static int synaptics_reconnect(struct psmouse *psmouse)
1376 {
1377         struct synaptics_data *priv = psmouse->private;
1378         struct synaptics_device_info info;
1379         unsigned char param[2];
1380         int retry = 0;
1381         int error;
1382
1383         do {
1384                 psmouse_reset(psmouse);
1385                 if (retry) {
1386                         /*
1387                          * On some boxes, right after resuming, the touchpad
1388                          * needs some time to finish initializing (I assume
1389                          * it needs time to calibrate) and start responding
1390                          * to Synaptics-specific queries, so let's wait a
1391                          * bit.
1392                          */
1393                         ssleep(1);
1394                 }
1395                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1396                 error = synaptics_detect(psmouse, 0);
1397         } while (error && ++retry < 3);
1398
1399         if (error)
1400                 return -1;
1401
1402         if (retry > 1)
1403                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1404
1405         if (synaptics_query_hardware(psmouse, &info)) {
1406                 psmouse_err(psmouse, "Unable to query device.\n");
1407                 return -1;
1408         }
1409
1410         if (synaptics_set_mode(psmouse)) {
1411                 psmouse_err(psmouse, "Unable to initialize device.\n");
1412                 return -1;
1413         }
1414
1415         if (info.identity != priv->info.identity ||
1416             info.model_id != priv->info.model_id ||
1417             info.capabilities != priv->info.capabilities ||
1418             info.ext_cap != priv->info.ext_cap) {
1419                 psmouse_err(psmouse,
1420                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1421                             priv->info.identity, info.identity,
1422                             priv->info.model_id, info.model_id,
1423                             priv->info.capabilities, info.capabilities,
1424                             priv->info.ext_cap, info.ext_cap);
1425                 return -1;
1426         }
1427
1428         return 0;
1429 }
1430
1431 static bool impaired_toshiba_kbc;
1432
1433 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1434 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1435         {
1436                 /* Toshiba Satellite */
1437                 .matches = {
1438                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1439                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1440                 },
1441         },
1442         {
1443                 /* Toshiba Dynabook */
1444                 .matches = {
1445                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1446                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1447                 },
1448         },
1449         {
1450                 /* Toshiba Portege M300 */
1451                 .matches = {
1452                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1453                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1454                 },
1455
1456         },
1457         {
1458                 /* Toshiba Portege M300 */
1459                 .matches = {
1460                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1461                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1462                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1463                 },
1464
1465         },
1466 #endif
1467         { }
1468 };
1469
1470 static bool broken_olpc_ec;
1471
1472 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1473 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1474         {
1475                 /* OLPC XO-1 or XO-1.5 */
1476                 .matches = {
1477                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1478                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1479                 },
1480         },
1481 #endif
1482         { }
1483 };
1484
1485 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1486 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1487         {
1488                 /* Cr-48 Chromebook (Codename Mario) */
1489                 .matches = {
1490                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1491                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1492                 },
1493         },
1494 #endif
1495         { }
1496 };
1497
1498 void __init synaptics_module_init(void)
1499 {
1500         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1501         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1502         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1503 }
1504
1505 static int synaptics_init_ps2(struct psmouse *psmouse,
1506                               struct synaptics_device_info *info,
1507                               bool absolute_mode)
1508 {
1509         struct synaptics_data *priv;
1510         int err;
1511
1512         synaptics_apply_quirks(psmouse, info);
1513
1514         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1515         if (!priv)
1516                 return -ENOMEM;
1517
1518         priv->info = *info;
1519         priv->absolute_mode = absolute_mode;
1520         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1521                 priv->disable_gesture = true;
1522
1523         /*
1524          * Unfortunately ForcePad capability is not exported over PS/2,
1525          * so we have to resort to checking PNP IDs.
1526          */
1527         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1528
1529         err = synaptics_set_mode(psmouse);
1530         if (err) {
1531                 psmouse_err(psmouse, "Unable to initialize device.\n");
1532                 goto init_fail;
1533         }
1534
1535         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1536                                         SYN_NEWABS : SYN_OLDABS;
1537
1538         psmouse_info(psmouse,
1539                      "Touchpad model: %u, fw: %u.%u, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1540                      SYN_ID_MODEL(info->identity),
1541                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1542                      info->model_id,
1543                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1544                      info->ext_cap_10, info->board_id, info->firmware_id);
1545
1546         set_input_params(psmouse, priv);
1547
1548         /*
1549          * Encode touchpad model so that it can be used to set
1550          * input device->id.version and be visible to userspace.
1551          * Because version is __u16 we have to drop something.
1552          * Hardware info bits seem to be good candidates as they
1553          * are documented to be for Synaptics corp. internal use.
1554          */
1555         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1556                           (info->model_id & 0x000000ff);
1557
1558         if (absolute_mode) {
1559                 psmouse->protocol_handler = synaptics_process_byte;
1560                 psmouse->pktsize = 6;
1561         } else {
1562                 /* Relative mode follows standard PS/2 mouse protocol */
1563                 psmouse->protocol_handler = psmouse_process_byte;
1564                 psmouse->pktsize = 3;
1565         }
1566
1567         psmouse->set_rate = synaptics_set_rate;
1568         psmouse->disconnect = synaptics_disconnect;
1569         psmouse->reconnect = synaptics_reconnect;
1570         psmouse->cleanup = synaptics_reset;
1571         /* Synaptics can usually stay in sync without extra help */
1572         psmouse->resync_time = 0;
1573
1574         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1575                 synaptics_pt_create(psmouse);
1576
1577         /*
1578          * Toshiba's KBC seems to have trouble handling data from
1579          * Synaptics at full rate.  Switch to a lower rate (roughly
1580          * the same rate as a standard PS/2 mouse).
1581          */
1582         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1583                 psmouse_info(psmouse,
1584                              "Toshiba %s detected, limiting rate to 40pps.\n",
1585                              dmi_get_system_info(DMI_PRODUCT_NAME));
1586                 psmouse->rate = 40;
1587         }
1588
1589         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1590                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1591                                          &psmouse_attr_disable_gesture.dattr);
1592                 if (err) {
1593                         psmouse_err(psmouse,
1594                                     "Failed to create disable_gesture attribute (%d)",
1595                                     err);
1596                         goto init_fail;
1597                 }
1598         }
1599
1600         return 0;
1601
1602  init_fail:
1603         kfree(priv);
1604         return err;
1605 }
1606
1607 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1608 {
1609         struct synaptics_device_info info;
1610         int error;
1611
1612         psmouse_reset(psmouse);
1613
1614         error = synaptics_query_hardware(psmouse, &info);
1615         if (error) {
1616                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1617                 return error;
1618         }
1619
1620         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1621 }
1622
1623 int synaptics_init_absolute(struct psmouse *psmouse)
1624 {
1625         return __synaptics_init(psmouse, true);
1626 }
1627
1628 int synaptics_init_relative(struct psmouse *psmouse)
1629 {
1630         return __synaptics_init(psmouse, false);
1631 }
1632
1633 static int synaptics_setup_ps2(struct psmouse *psmouse,
1634                                struct synaptics_device_info *info)
1635 {
1636         bool absolute_mode = true;
1637         int error;
1638
1639         /*
1640          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1641          * packet spew overloads the EC such that key presses on the keyboard
1642          * are missed.  Given that, don't even attempt to use Absolute mode.
1643          * Relative mode seems to work just fine.
1644          */
1645         if (broken_olpc_ec) {
1646                 psmouse_info(psmouse,
1647                              "OLPC XO detected, forcing relative protocol.\n");
1648                 absolute_mode = false;
1649         }
1650
1651         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1652         if (error)
1653                 return error;
1654
1655         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1656 }
1657
1658 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1659
1660 void __init synaptics_module_init(void)
1661 {
1662 }
1663
1664 static int __maybe_unused
1665 synaptics_setup_ps2(struct psmouse *psmouse,
1666                     struct synaptics_device_info *info)
1667 {
1668         return -ENOSYS;
1669 }
1670
1671 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1672
1673 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1674
1675 /*
1676  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1677  * provides a better bandwidth and allow a better control of the touchpads.
1678  * This is used to decide if we need to use this bus or not.
1679  */
1680 enum {
1681         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1682         SYNAPTICS_INTERTOUCH_OFF,
1683         SYNAPTICS_INTERTOUCH_ON,
1684 };
1685
1686 static int synaptics_intertouch = SYNAPTICS_INTERTOUCH_NOT_SET;
1687 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1688 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1689
1690 static int synaptics_create_intertouch(struct psmouse *psmouse,
1691                                        struct synaptics_device_info *info,
1692                                        bool leave_breadcrumbs)
1693 {
1694         bool topbuttonpad =
1695                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1696                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1697         const struct rmi_device_platform_data pdata = {
1698                 .sensor_pdata = {
1699                         .sensor_type = rmi_sensor_touchpad,
1700                         .axis_align.flip_y = true,
1701                         /* to prevent cursors jumps: */
1702                         .kernel_tracking = true,
1703                         .topbuttonpad = topbuttonpad,
1704                 },
1705                 .f30_data = {
1706                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1707                         .trackstick_buttons =
1708                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1709                 },
1710         };
1711         const struct i2c_board_info intertouch_board = {
1712                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1713                 .flags = I2C_CLIENT_HOST_NOTIFY,
1714         };
1715
1716         return psmouse_smbus_init(psmouse, &intertouch_board,
1717                                   &pdata, sizeof(pdata),
1718                                   leave_breadcrumbs);
1719 }
1720
1721 /**
1722  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1723  * and decides to instantiate a SMBus InterTouch device.
1724  */
1725 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1726                                       struct synaptics_device_info *info,
1727                                       bool leave_breadcrumbs)
1728 {
1729         int error;
1730
1731         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1732                 return -ENXIO;
1733
1734         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1735                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1736                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids))
1737                         return -ENXIO;
1738         }
1739
1740         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1741
1742         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1743         if (error) {
1744                 if (error == -EAGAIN)
1745                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1746                 else
1747                         psmouse_err(psmouse, "unable to create intertouch device\n");
1748
1749                 return error;
1750         }
1751
1752         return 0;
1753 }
1754
1755 int synaptics_init_smbus(struct psmouse *psmouse)
1756 {
1757         struct synaptics_device_info info;
1758         int error;
1759
1760         psmouse_reset(psmouse);
1761
1762         error = synaptics_query_hardware(psmouse, &info);
1763         if (error) {
1764                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1765                 return error;
1766         }
1767
1768         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1769                 return -ENXIO;
1770
1771         return synaptics_create_intertouch(psmouse, &info, false);
1772 }
1773
1774 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1775
1776 static int __maybe_unused
1777 synaptics_setup_intertouch(struct psmouse *psmouse,
1778                            struct synaptics_device_info *info,
1779                            bool leave_breadcrumbs)
1780 {
1781         return -ENOSYS;
1782 }
1783
1784 int synaptics_init_smbus(struct psmouse *psmouse)
1785 {
1786         return -ENOSYS;
1787 }
1788
1789 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1790
1791 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1792     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1793
1794 int synaptics_init(struct psmouse *psmouse)
1795 {
1796         struct synaptics_device_info info;
1797         int error;
1798         int retval;
1799
1800         psmouse_reset(psmouse);
1801
1802         error = synaptics_query_hardware(psmouse, &info);
1803         if (error) {
1804                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1805                 return error;
1806         }
1807
1808         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1809                 error = synaptics_setup_intertouch(psmouse, &info, true);
1810                 if (!error)
1811                         return PSMOUSE_SYNAPTICS_SMBUS;
1812         }
1813
1814         retval = synaptics_setup_ps2(psmouse, &info);
1815         if (retval < 0) {
1816                 /*
1817                  * Not using any flavor of Synaptics support, so clean up
1818                  * SMbus breadcrumbs, if any.
1819                  */
1820                 psmouse_smbus_cleanup(psmouse);
1821         }
1822
1823         return retval;
1824 }
1825
1826 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1827
1828 int synaptics_init(struct psmouse *psmouse)
1829 {
1830         return -ENOSYS;
1831 }
1832
1833 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */