drivers/input/mouse/synaptics.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Synaptics TouchPad PS/2 mouse driver
   4  *
   5  *   2003 Dmitry Torokhov <dtor@mail.ru>
   6  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
   7  *     for explaining various Synaptics quirks.
   8  *
   9  *   2003 Peter Osterlund <petero2@telia.com>
  10  *     Ported to 2.5 input device infrastructure.
  11  *
  12  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
  13  *     start merging tpconfig and gpm code to a xfree-input module
  14  *     adding some changes and extensions (ex. 3rd and 4th button)
  15  *
  16  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
  17  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
  18  *     code for the special synaptics commands (from the tpconfig-source)
  19  *
  20  * Trademarks are the property of their respective owners.
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/delay.h>
  25 #include <linux/dmi.h>
  26 #include <linux/input/mt.h>
  27 #include <linux/serio.h>
  28 #include <linux/libps2.h>
  29 #include <linux/rmi.h>
  30 #include <linux/i2c.h>
  31 #include <linux/slab.h>
  32 #include "psmouse.h"
  33 #include "synaptics.h"
  34
  35 /*
  36  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  37  * section 2.3.2, which says that they should be valid regardless of the
  38  * actual size of the sensor.
  39  * Note that newer firmware allows querying device for maximum useable
  40  * coordinates.
  41  */
  42 #define XMIN 0
  43 #define XMAX 6143
  44 #define YMIN 0
  45 #define YMAX 6143
  46 #define XMIN_NOMINAL 1472
  47 #define XMAX_NOMINAL 5472
  48 #define YMIN_NOMINAL 1408
  49 #define YMAX_NOMINAL 4448
  50
  51 /* Size in bits of absolute position values reported by the hardware */
  52 #define ABS_POS_BITS 13
  53
  54 /*
  55  * These values should represent the absolute maximum value that will
  56  * be reported for a positive position value. Some Synaptics firmware
  57  * uses this value to indicate a finger near the edge of the touchpad
  58  * whose precise position cannot be determined.
  59  *
  60  * At least one touchpad is known to report positions in excess of this
  61  * value which are actually negative values truncated to the 13-bit
  62  * reporting range. These values have never been observed to be lower
  63  * than 8184 (i.e. -8), so we treat all values greater than 8176 as
  64  * negative and any other value as positive.
  65  */
  66 #define X_MAX_POSITIVE 8176
  67 #define Y_MAX_POSITIVE 8176
  68
  69 /* maximum ABS_MT_POSITION displacement (in mm) */
  70 #define DMAX 10
  71
  72 /*****************************************************************************
  73  *      Stuff we need even when we do not want native Synaptics support
  74  ****************************************************************************/
  75
  76 /*
  77  * Set the synaptics touchpad mode byte by special commands
  78  */
  79 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode)
  80 {
  81         u8 param[1];
  82         int error;
  83
  84         error = ps2_sliced_command(&psmouse->ps2dev, mode);
  85         if (error)
  86                 return error;
  87
  88         param[0] = SYN_PS_SET_MODE2;
  89         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE);
  90         if (error)
  91                 return error;
  92
  93         return 0;
  94 }
  95
  96 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  97 {
  98         struct ps2dev *ps2dev = &psmouse->ps2dev;
  99         u8 param[4] = { 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         "LEN2000", /* S540 */
 150         "LEN2001", /* Edge E431 */
 151         "LEN2002", /* Edge E531 */
 152         "LEN2003",
 153         "LEN2004", /* L440 */
 154         "LEN2005",
 155         "LEN2006", /* Edge E440/E540 */
 156         "LEN2007",
 157         "LEN2008",
 158         "LEN2009",
 159         "LEN200A",
 160         "LEN200B",
 161         NULL
 162 };
 163
 164 static const char * const smbus_pnp_ids[] = {
 165         /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */
 166         "LEN0048", /* X1 Carbon 3 */
 167         "LEN0046", /* X250 */
 168         "LEN0049", /* Yoga 11e */
 169         "LEN004a", /* W541 */
 170         "LEN005b", /* P50 */
 171         "LEN005e", /* T560 */
 172         "LEN006c", /* T470s */
 173         "LEN007a", /* T470s */
 174         "LEN0071", /* T480 */
 175         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 176         "LEN0073", /* X1 Carbon G5 (Elantech) */
 177         "LEN0091", /* X1 Carbon 6 */
 178         "LEN0092", /* X1 Carbon 6 */
 179         "LEN0093", /* T480 */
 180         "LEN0096", /* X280 */
 181         "LEN0097", /* X280 -> ALPS trackpoint */
 182         "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */
 183         "LEN009b", /* T580 */
 184         "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */
 185         "LEN200f", /* T450s */
 186         "LEN2044", /* L470  */
 187         "LEN2054", /* E480 */
 188         "LEN2055", /* E580 */
 189         "LEN2068", /* T14 Gen 1 */
 190         "SYN3052", /* HP EliteBook 840 G4 */
 191         "SYN3221", /* HP 15-ay000 */
 192         "SYN323d", /* HP Spectre X360 13-w013dx */
 193         "SYN3257", /* HP Envy 13-ad105ng */
 194         NULL
 195 };
 196
 197 static const char * const forcepad_pnp_ids[] = {
 198         "SYN300D",
 199         "SYN3014",
 200         NULL
 201 };
 202
 203 /*
 204  * Send a command to the synaptics touchpad by special commands
 205  */
 206 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 207 {
 208         int error;
 209
 210         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 211         if (error)
 212                 return error;
 213
 214         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 215         if (error)
 216                 return error;
 217
 218         return 0;
 219 }
 220
 221 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 222 {
 223         int error;
 224         union {
 225                 __be32 be_val;
 226                 char buf[4];
 227         } resp = { 0 };
 228
 229         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 230         if (error)
 231                 return error;
 232
 233         *val = be32_to_cpu(resp.be_val);
 234         return 0;
 235 }
 236
 237 /*
 238  * Identify Touchpad
 239  * See also the SYN_ID_* macros
 240  */
 241 static int synaptics_identify(struct psmouse *psmouse,
 242                               struct synaptics_device_info *info)
 243 {
 244         int error;
 245
 246         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 247         if (error)
 248                 return error;
 249
 250         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 251 }
 252
 253 /*
 254  * Read the model-id bytes from the touchpad
 255  * see also SYN_MODEL_* macros
 256  */
 257 static int synaptics_model_id(struct psmouse *psmouse,
 258                               struct synaptics_device_info *info)
 259 {
 260         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 261 }
 262
 263 /*
 264  * Read the firmware id from the touchpad
 265  */
 266 static int synaptics_firmware_id(struct psmouse *psmouse,
 267                                  struct synaptics_device_info *info)
 268 {
 269         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 270                                    &info->firmware_id);
 271 }
 272
 273 /*
 274  * Read the board id and the "More Extended Queries" from the touchpad
 275  * The board id is encoded in the "QUERY MODES" response
 276  */
 277 static int synaptics_query_modes(struct psmouse *psmouse,
 278                                  struct synaptics_device_info *info)
 279 {
 280         u8 bid[3];
 281         int error;
 282
 283         /* firmwares prior 7.5 have no board_id encoded */
 284         if (SYN_ID_FULL(info->identity) < 0x705)
 285                 return 0;
 286
 287         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 288         if (error)
 289                 return error;
 290
 291         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 292
 293         if (SYN_MEXT_CAP_BIT(bid[0]))
 294                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 295                                            &info->ext_cap_10);
 296
 297         return 0;
 298 }
 299
 300 /*
 301  * Read the capability-bits from the touchpad
 302  * see also the SYN_CAP_* macros
 303  */
 304 static int synaptics_capability(struct psmouse *psmouse,
 305                                 struct synaptics_device_info *info)
 306 {
 307         int error;
 308
 309         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 310                                     &info->capabilities);
 311         if (error)
 312                 return error;
 313
 314         info->ext_cap = info->ext_cap_0c = 0;
 315
 316         /*
 317          * Older firmwares had submodel ID fixed to 0x47
 318          */
 319         if (SYN_ID_FULL(info->identity) < 0x705 &&
 320             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 321                 return -ENXIO;
 322         }
 323
 324         /*
 325          * Unless capExtended is set the rest of the flags should be ignored
 326          */
 327         if (!SYN_CAP_EXTENDED(info->capabilities))
 328                 info->capabilities = 0;
 329
 330         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 331                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 332                                             &info->ext_cap);
 333                 if (error) {
 334                         psmouse_warn(psmouse,
 335                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 336                 } else {
 337                         /*
 338                          * if nExtBtn is greater than 8 it should be considered
 339                          * invalid and treated as 0
 340                          */
 341                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 342                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 343                 }
 344         }
 345
 346         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 347                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 348                                             &info->ext_cap_0c);
 349                 if (error)
 350                         psmouse_warn(psmouse,
 351                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 352         }
 353
 354         return 0;
 355 }
 356
 357 /*
 358  * Read touchpad resolution and maximum reported coordinates
 359  * Resolution is left zero if touchpad does not support the query
 360  */
 361 static int synaptics_resolution(struct psmouse *psmouse,
 362                                 struct synaptics_device_info *info)
 363 {
 364         u8 resp[3];
 365         int error;
 366
 367         if (SYN_ID_MAJOR(info->identity) < 4)
 368                 return 0;
 369
 370         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 371         if (!error) {
 372                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 373                         info->x_res = resp[0]; /* x resolution in units/mm */
 374                         info->y_res = resp[2]; /* y resolution in units/mm */
 375                 }
 376         }
 377
 378         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 379             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 380                 error = synaptics_send_cmd(psmouse,
 381                                            SYN_QUE_EXT_MAX_COORDS, resp);
 382                 if (error) {
 383                         psmouse_warn(psmouse,
 384                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 385                 } else {
 386                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 387                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 388                         psmouse_info(psmouse,
 389                                      "queried max coordinates: x [..%d], y [..%d]\n",
 390                                      info->x_max, info->y_max);
 391                 }
 392         }
 393
 394         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 395             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 396              /*
 397               * Firmware v8.1 does not report proper number of extended
 398               * capabilities, but has been proven to report correct min
 399               * coordinates.
 400               */
 401              SYN_ID_FULL(info->identity) == 0x801)) {
 402                 error = synaptics_send_cmd(psmouse,
 403                                            SYN_QUE_EXT_MIN_COORDS, resp);
 404                 if (error) {
 405                         psmouse_warn(psmouse,
 406                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 407                 } else {
 408                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 409                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 410                         psmouse_info(psmouse,
 411                                      "queried min coordinates: x [%d..], y [%d..]\n",
 412                                      info->x_min, info->y_min);
 413                 }
 414         }
 415
 416         return 0;
 417 }
 418
 419 static int synaptics_query_hardware(struct psmouse *psmouse,
 420                                     struct synaptics_device_info *info)
 421 {
 422         int error;
 423
 424         memset(info, 0, sizeof(*info));
 425
 426         error = synaptics_identify(psmouse, info);
 427         if (error)
 428                 return error;
 429
 430         error = synaptics_model_id(psmouse, info);
 431         if (error)
 432                 return error;
 433
 434         error = synaptics_firmware_id(psmouse, info);
 435         if (error)
 436                 return error;
 437
 438         error = synaptics_query_modes(psmouse, info);
 439         if (error)
 440                 return error;
 441
 442         error = synaptics_capability(psmouse, info);
 443         if (error)
 444                 return error;
 445
 446         error = synaptics_resolution(psmouse, info);
 447         if (error)
 448                 return error;
 449
 450         return 0;
 451 }
 452
 453 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 454
 455 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 456
 457 static bool cr48_profile_sensor;
 458
 459 #define ANY_BOARD_ID 0
 460 struct min_max_quirk {
 461         const char * const *pnp_ids;
 462         struct {
 463                 u32 min, max;
 464         } board_id;
 465         u32 x_min, x_max, y_min, y_max;
 466 };
 467
 468 static const struct min_max_quirk min_max_pnpid_table[] = {
 469         {
 470                 (const char * const []){"LEN0033", NULL},
 471                 {ANY_BOARD_ID, ANY_BOARD_ID},
 472                 1024, 5052, 2258, 4832
 473         },
 474         {
 475                 (const char * const []){"LEN0042", NULL},
 476                 {ANY_BOARD_ID, ANY_BOARD_ID},
 477                 1232, 5710, 1156, 4696
 478         },
 479         {
 480                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 481                                         "LEN0039", "LEN2002", "LEN2004",
 482                                         NULL},
 483                 {ANY_BOARD_ID, 2961},
 484                 1024, 5112, 2024, 4832
 485         },
 486         {
 487                 (const char * const []){"LEN2000", NULL},
 488                 {ANY_BOARD_ID, ANY_BOARD_ID},
 489                 1024, 5113, 2021, 4832
 490         },
 491         {
 492                 (const char * const []){"LEN2001", NULL},
 493                 {ANY_BOARD_ID, ANY_BOARD_ID},
 494                 1024, 5022, 2508, 4832
 495         },
 496         {
 497                 (const char * const []){"LEN2006", NULL},
 498                 {2691, 2691},
 499                 1024, 5045, 2457, 4832
 500         },
 501         {
 502                 (const char * const []){"LEN2006", NULL},
 503                 {ANY_BOARD_ID, ANY_BOARD_ID},
 504                 1264, 5675, 1171, 4688
 505         },
 506         { }
 507 };
 508
 509 /*****************************************************************************
 510  *      Synaptics communications functions
 511  ****************************************************************************/
 512
 513 /*
 514  * Synaptics touchpads report the y coordinate from bottom to top, which is
 515  * opposite from what userspace expects.
 516  * This function is used to invert y before reporting.
 517  */
 518 static int synaptics_invert_y(int y)
 519 {
 520         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 521 }
 522
 523 /*
 524  * Apply quirk(s) if the hardware matches
 525  */
 526 static void synaptics_apply_quirks(struct psmouse *psmouse,
 527                                    struct synaptics_device_info *info)
 528 {
 529         int i;
 530
 531         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 532                 if (!psmouse_matches_pnp_id(psmouse,
 533                                             min_max_pnpid_table[i].pnp_ids))
 534                         continue;
 535
 536                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 537                     info->board_id < min_max_pnpid_table[i].board_id.min)
 538                         continue;
 539
 540                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 541                     info->board_id > min_max_pnpid_table[i].board_id.max)
 542                         continue;
 543
 544                 info->x_min = min_max_pnpid_table[i].x_min;
 545                 info->x_max = min_max_pnpid_table[i].x_max;
 546                 info->y_min = min_max_pnpid_table[i].y_min;
 547                 info->y_max = min_max_pnpid_table[i].y_max;
 548                 psmouse_info(psmouse,
 549                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 550                              info->x_min, info->x_max,
 551                              info->y_min, info->y_max);
 552                 break;
 553         }
 554 }
 555
 556 static bool synaptics_has_agm(struct synaptics_data *priv)
 557 {
 558         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 559                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 560 }
 561
 562 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 563 {
 564         static u8 param = 0xc8;
 565         int error;
 566
 567         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 568         if (error)
 569                 return error;
 570
 571         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 572         if (error)
 573                 return error;
 574
 575         return 0;
 576 }
 577
 578 static int synaptics_set_mode(struct psmouse *psmouse)
 579 {
 580         struct synaptics_data *priv = psmouse->private;
 581         int error;
 582
 583         priv->mode = 0;
 584         if (priv->absolute_mode)
 585                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 586         if (priv->disable_gesture)
 587                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 588         if (psmouse->rate >= 80)
 589                 priv->mode |= SYN_BIT_HIGH_RATE;
 590         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 591                 priv->mode |= SYN_BIT_W_MODE;
 592
 593         error = synaptics_mode_cmd(psmouse, priv->mode);
 594         if (error)
 595                 return error;
 596
 597         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 598                 error = synaptics_set_advanced_gesture_mode(psmouse);
 599                 if (error) {
 600                         psmouse_err(psmouse,
 601                                     "Advanced gesture mode init failed: %d\n",
 602                                     error);
 603                         return error;
 604                 }
 605         }
 606
 607         return 0;
 608 }
 609
 610 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 611 {
 612         struct synaptics_data *priv = psmouse->private;
 613
 614         if (rate >= 80) {
 615                 priv->mode |= SYN_BIT_HIGH_RATE;
 616                 psmouse->rate = 80;
 617         } else {
 618                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 619                 psmouse->rate = 40;
 620         }
 621
 622         synaptics_mode_cmd(psmouse, priv->mode);
 623 }
 624
 625 /*****************************************************************************
 626  *      Synaptics pass-through PS/2 port support
 627  ****************************************************************************/
 628 static int synaptics_pt_write(struct serio *serio, u8 c)
 629 {
 630         struct psmouse *parent = serio_get_drvdata(serio->parent);
 631         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 632         int error;
 633
 634         error = ps2_sliced_command(&parent->ps2dev, c);
 635         if (error)
 636                 return error;
 637
 638         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 639         if (error)
 640                 return error;
 641
 642         return 0;
 643 }
 644
 645 static int synaptics_pt_start(struct serio *serio)
 646 {
 647         struct psmouse *parent = serio_get_drvdata(serio->parent);
 648         struct synaptics_data *priv = parent->private;
 649
 650         serio_pause_rx(parent->ps2dev.serio);
 651         priv->pt_port = serio;
 652         serio_continue_rx(parent->ps2dev.serio);
 653
 654         return 0;
 655 }
 656
 657 static void synaptics_pt_stop(struct serio *serio)
 658 {
 659         struct psmouse *parent = serio_get_drvdata(serio->parent);
 660         struct synaptics_data *priv = parent->private;
 661
 662         serio_pause_rx(parent->ps2dev.serio);
 663         priv->pt_port = NULL;
 664         serio_continue_rx(parent->ps2dev.serio);
 665 }
 666
 667 static int synaptics_is_pt_packet(u8 *buf)
 668 {
 669         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 670 }
 671
 672 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 673 {
 674         struct psmouse *child = serio_get_drvdata(ptport);
 675
 676         if (child && child->state == PSMOUSE_ACTIVATED) {
 677                 serio_interrupt(ptport, packet[1], 0);
 678                 serio_interrupt(ptport, packet[4], 0);
 679                 serio_interrupt(ptport, packet[5], 0);
 680                 if (child->pktsize == 4)
 681                         serio_interrupt(ptport, packet[2], 0);
 682         } else {
 683                 serio_interrupt(ptport, packet[1], 0);
 684         }
 685 }
 686
 687 static void synaptics_pt_activate(struct psmouse *psmouse)
 688 {
 689         struct synaptics_data *priv = psmouse->private;
 690         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 691
 692         /* adjust the touchpad to child's choice of protocol */
 693         if (child) {
 694                 if (child->pktsize == 4)
 695                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 696                 else
 697                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 698
 699                 if (synaptics_mode_cmd(psmouse, priv->mode))
 700                         psmouse_warn(psmouse,
 701                                      "failed to switch guest protocol\n");
 702         }
 703 }
 704
 705 static void synaptics_pt_create(struct psmouse *psmouse)
 706 {
 707         struct serio *serio;
 708
 709         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 710         if (!serio) {
 711                 psmouse_err(psmouse,
 712                             "not enough memory for pass-through port\n");
 713                 return;
 714         }
 715
 716         serio->id.type = SERIO_PS_PSTHRU;
 717         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 718         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
 719         serio->write = synaptics_pt_write;
 720         serio->start = synaptics_pt_start;
 721         serio->stop = synaptics_pt_stop;
 722         serio->parent = psmouse->ps2dev.serio;
 723
 724         psmouse->pt_activate = synaptics_pt_activate;
 725
 726         psmouse_info(psmouse, "serio: %s port at %s\n",
 727                      serio->name, psmouse->phys);
 728         serio_register_port(serio);
 729 }
 730
 731 /*****************************************************************************
 732  *      Functions to interpret the absolute mode packets
 733  ****************************************************************************/
 734
 735 static void synaptics_parse_agm(const u8 buf[],
 736                                 struct synaptics_data *priv,
 737                                 struct synaptics_hw_state *hw)
 738 {
 739         struct synaptics_hw_state *agm = &priv->agm;
 740         int agm_packet_type;
 741
 742         agm_packet_type = (buf[5] & 0x30) >> 4;
 743         switch (agm_packet_type) {
 744         case 1:
 745                 /* Gesture packet: (x, y, z) half resolution */
 746                 agm->w = hw->w;
 747                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 748                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 749                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 750                 break;
 751
 752         case 2:
 753                 /* AGM-CONTACT packet: we are only interested in the count */
 754                 priv->agm_count = buf[1];
 755                 break;
 756
 757         default:
 758                 break;
 759         }
 760 }
 761
 762 static void synaptics_parse_ext_buttons(const u8 buf[],
 763                                         struct synaptics_data *priv,
 764                                         struct synaptics_hw_state *hw)
 765 {
 766         unsigned int ext_bits =
 767                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 768         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 769
 770         hw->ext_buttons = buf[4] & ext_mask;
 771         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 772 }
 773
 774 static int synaptics_parse_hw_state(const u8 buf[],
 775                                     struct synaptics_data *priv,
 776                                     struct synaptics_hw_state *hw)
 777 {
 778         memset(hw, 0, sizeof(struct synaptics_hw_state));
 779
 780         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 781                 hw->w = (((buf[0] & 0x30) >> 2) |
 782                          ((buf[0] & 0x04) >> 1) |
 783                          ((buf[3] & 0x04) >> 2));
 784
 785                 if (synaptics_has_agm(priv) && hw->w == 2) {
 786                         synaptics_parse_agm(buf, priv, hw);
 787                         return 1;
 788                 }
 789
 790                 hw->x = (((buf[3] & 0x10) << 8) |
 791                          ((buf[1] & 0x0f) << 8) |
 792                          buf[4]);
 793                 hw->y = (((buf[3] & 0x20) << 7) |
 794                          ((buf[1] & 0xf0) << 4) |
 795                          buf[5]);
 796                 hw->z = buf[2];
 797
 798                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 799                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 800
 801                 if (priv->is_forcepad) {
 802                         /*
 803                          * ForcePads, like Clickpads, use middle button
 804                          * bits to report primary button clicks.
 805                          * Unfortunately they report primary button not
 806                          * only when user presses on the pad above certain
 807                          * threshold, but also when there are more than one
 808                          * finger on the touchpad, which interferes with
 809                          * out multi-finger gestures.
 810                          */
 811                         if (hw->z == 0) {
 812                                 /* No contacts */
 813                                 priv->press = priv->report_press = false;
 814                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 815                                 /*
 816                                  * Single-finger touch with pressure above
 817                                  * the threshold. If pressure stays long
 818                                  * enough, we'll start reporting primary
 819                                  * button. We rely on the device continuing
 820                                  * sending data even if finger does not
 821                                  * move.
 822                                  */
 823                                 if  (!priv->press) {
 824                                         priv->press_start = jiffies;
 825                                         priv->press = true;
 826                                 } else if (time_after(jiffies,
 827                                                 priv->press_start +
 828                                                         msecs_to_jiffies(50))) {
 829                                         priv->report_press = true;
 830                                 }
 831                         } else {
 832                                 priv->press = false;
 833                         }
 834
 835                         hw->left = priv->report_press;
 836
 837                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 838                         /*
 839                          * Clickpad's button is transmitted as middle button,
 840                          * however, since it is primary button, we will report
 841                          * it as BTN_LEFT.
 842                          */
 843                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 844
 845                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 846                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 847                         if (hw->w == 2)
 848                                 hw->scroll = (s8)buf[1];
 849                 }
 850
 851                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 852                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 853                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 854                 }
 855
 856                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 857                     ((buf[0] ^ buf[3]) & 0x02)) {
 858                         synaptics_parse_ext_buttons(buf, priv, hw);
 859                 }
 860         } else {
 861                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 862                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 863
 864                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 865                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 866
 867                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 868                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 869         }
 870
 871         /*
 872          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 873          * is used by some firmware to indicate a finger at the edge of
 874          * the touchpad whose precise position cannot be determined, so
 875          * convert these values to the maximum axis value.
 876          */
 877         if (hw->x > X_MAX_POSITIVE)
 878                 hw->x -= 1 << ABS_POS_BITS;
 879         else if (hw->x == X_MAX_POSITIVE)
 880                 hw->x = XMAX;
 881
 882         if (hw->y > Y_MAX_POSITIVE)
 883                 hw->y -= 1 << ABS_POS_BITS;
 884         else if (hw->y == Y_MAX_POSITIVE)
 885                 hw->y = YMAX;
 886
 887         return 0;
 888 }
 889
 890 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 891                                           bool active, int x, int y)
 892 {
 893         input_mt_slot(dev, slot);
 894         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 895         if (active) {
 896                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 897                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 898         }
 899 }
 900
 901 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 902                                           const struct synaptics_hw_state *a,
 903                                           const struct synaptics_hw_state *b,
 904                                           int num_fingers)
 905 {
 906         if (num_fingers >= 2) {
 907                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 908                                               min(a->y, b->y));
 909                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 910                                               max(a->y, b->y));
 911         } else if (num_fingers == 1) {
 912                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 913                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 914         } else {
 915                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 916                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 917         }
 918 }
 919
 920 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 921                                          const struct synaptics_hw_state *hw)
 922 {
 923         struct input_dev *dev = psmouse->dev;
 924         struct synaptics_data *priv = psmouse->private;
 925         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 926         int i;
 927
 928         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 929                 return;
 930
 931         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 932         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 933              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 934             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 935                 return;
 936
 937         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 938                 for (i = 0; i < ext_bits; i++) {
 939                         input_report_key(dev, BTN_0 + 2 * i,
 940                                 hw->ext_buttons & BIT(i));
 941                         input_report_key(dev, BTN_1 + 2 * i,
 942                                 hw->ext_buttons & BIT(i + ext_bits));
 943                 }
 944                 return;
 945         }
 946
 947         /*
 948          * This generation of touchpads has the trackstick buttons
 949          * physically wired to the touchpad. Re-route them through
 950          * the pass-through interface.
 951          */
 952         if (priv->pt_port) {
 953                 u8 pt_buttons;
 954
 955                 /* The trackstick expects at most 3 buttons */
 956                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 957                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 958                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 959
 960                 serio_interrupt(priv->pt_port,
 961                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 962                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 963         }
 964 }
 965
 966 static void synaptics_report_buttons(struct psmouse *psmouse,
 967                                      const struct synaptics_hw_state *hw)
 968 {
 969         struct input_dev *dev = psmouse->dev;
 970         struct synaptics_data *priv = psmouse->private;
 971
 972         input_report_key(dev, BTN_LEFT, hw->left);
 973         input_report_key(dev, BTN_RIGHT, hw->right);
 974
 975         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 976                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 977
 978         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 979                 input_report_key(dev, BTN_FORWARD, hw->up);
 980                 input_report_key(dev, BTN_BACK, hw->down);
 981         }
 982
 983         synaptics_report_ext_buttons(psmouse, hw);
 984 }
 985
 986 static void synaptics_report_mt_data(struct psmouse *psmouse,
 987                                      const struct synaptics_hw_state *sgm,
 988                                      int num_fingers)
 989 {
 990         struct input_dev *dev = psmouse->dev;
 991         struct synaptics_data *priv = psmouse->private;
 992         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 993         struct input_mt_pos pos[2];
 994         int slot[2], nsemi, i;
 995
 996         nsemi = clamp_val(num_fingers, 0, 2);
 997
 998         for (i = 0; i < nsemi; i++) {
 999                 pos[i].x = hw[i]->x;
1000                 pos[i].y = synaptics_invert_y(hw[i]->y);
1001         }
1002
1003         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
1004
1005         for (i = 0; i < nsemi; i++) {
1006                 input_mt_slot(dev, slot[i]);
1007                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1008                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1009                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1010                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1011         }
1012
1013         input_mt_drop_unused(dev);
1014
1015         /* Don't use active slot count to generate BTN_TOOL events. */
1016         input_mt_report_pointer_emulation(dev, false);
1017
1018         /* Send the number of fingers reported by touchpad itself. */
1019         input_mt_report_finger_count(dev, num_fingers);
1020
1021         synaptics_report_buttons(psmouse, sgm);
1022
1023         input_sync(dev);
1024 }
1025
1026 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1027                                            struct synaptics_hw_state *sgm)
1028 {
1029         struct synaptics_data *priv = psmouse->private;
1030         int num_fingers;
1031
1032         /*
1033          * Update mt_state using the new finger count and current mt_state.
1034          */
1035         if (sgm->z == 0)
1036                 num_fingers = 0;
1037         else if (sgm->w >= 4)
1038                 num_fingers = 1;
1039         else if (sgm->w == 0)
1040                 num_fingers = 2;
1041         else if (sgm->w == 1)
1042                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1043         else
1044                 num_fingers = 4;
1045
1046         /* Send resulting input events to user space */
1047         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1048 }
1049
1050 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1051 {
1052         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1053                 return true;
1054
1055         /* Advanced gesture mode also sends multi finger data */
1056         return synaptics_has_agm(priv);
1057 }
1058
1059 /*
1060  *  called for each full received packet from the touchpad
1061  */
1062 static void synaptics_process_packet(struct psmouse *psmouse)
1063 {
1064         struct input_dev *dev = psmouse->dev;
1065         struct synaptics_data *priv = psmouse->private;
1066         struct synaptics_device_info *info = &priv->info;
1067         struct synaptics_hw_state hw;
1068         int num_fingers;
1069         int finger_width;
1070
1071         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1072                 return;
1073
1074         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1075                 synaptics_image_sensor_process(psmouse, &hw);
1076                 return;
1077         }
1078
1079         if (hw.scroll) {
1080                 priv->scroll += hw.scroll;
1081
1082                 while (priv->scroll >= 4) {
1083                         input_report_key(dev, BTN_BACK, !hw.down);
1084                         input_sync(dev);
1085                         input_report_key(dev, BTN_BACK, hw.down);
1086                         input_sync(dev);
1087                         priv->scroll -= 4;
1088                 }
1089                 while (priv->scroll <= -4) {
1090                         input_report_key(dev, BTN_FORWARD, !hw.up);
1091                         input_sync(dev);
1092                         input_report_key(dev, BTN_FORWARD, hw.up);
1093                         input_sync(dev);
1094                         priv->scroll += 4;
1095                 }
1096                 return;
1097         }
1098
1099         if (hw.z > 0 && hw.x > 1) {
1100                 num_fingers = 1;
1101                 finger_width = 5;
1102                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1103                         switch (hw.w) {
1104                         case 0 ... 1:
1105                                 if (synaptics_has_multifinger(priv))
1106                                         num_fingers = hw.w + 2;
1107                                 break;
1108                         case 2:
1109                                 if (SYN_MODEL_PEN(info->model_id))
1110                                         ;   /* Nothing, treat a pen as a single finger */
1111                                 break;
1112                         case 4 ... 15:
1113                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1114                                         finger_width = hw.w;
1115                                 break;
1116                         }
1117                 }
1118         } else {
1119                 num_fingers = 0;
1120                 finger_width = 0;
1121         }
1122
1123         if (cr48_profile_sensor) {
1124                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1125                 return;
1126         }
1127
1128         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1129                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1130                                               num_fingers);
1131
1132         /* Post events
1133          * BTN_TOUCH has to be first as mousedev relies on it when doing
1134          * absolute -> relative conversion
1135          */
1136         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1137         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1138
1139         if (num_fingers > 0) {
1140                 input_report_abs(dev, ABS_X, hw.x);
1141                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1142         }
1143         input_report_abs(dev, ABS_PRESSURE, hw.z);
1144
1145         if (SYN_CAP_PALMDETECT(info->capabilities))
1146                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1147
1148         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1149         if (synaptics_has_multifinger(priv)) {
1150                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1151                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1152         }
1153
1154         synaptics_report_buttons(psmouse, &hw);
1155
1156         input_sync(dev);
1157 }
1158
1159 static bool synaptics_validate_byte(struct psmouse *psmouse,
1160                                     int idx, enum synaptics_pkt_type pkt_type)
1161 {
1162         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1163         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1164         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1165         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1166         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1167         const u8 *packet = psmouse->packet;
1168
1169         if (idx < 0 || idx > 4)
1170                 return false;
1171
1172         switch (pkt_type) {
1173
1174         case SYN_NEWABS:
1175         case SYN_NEWABS_RELAXED:
1176                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1177
1178         case SYN_NEWABS_STRICT:
1179                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1180
1181         case SYN_OLDABS:
1182                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1183
1184         default:
1185                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1186                 return false;
1187         }
1188 }
1189
1190 static enum synaptics_pkt_type
1191 synaptics_detect_pkt_type(struct psmouse *psmouse)
1192 {
1193         int i;
1194
1195         for (i = 0; i < 5; i++) {
1196                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1197                         psmouse_info(psmouse, "using relaxed packet validation\n");
1198                         return SYN_NEWABS_RELAXED;
1199                 }
1200         }
1201
1202         return SYN_NEWABS_STRICT;
1203 }
1204
1205 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1206 {
1207         struct synaptics_data *priv = psmouse->private;
1208
1209         if (psmouse->pktcnt >= 6) { /* Full packet received */
1210                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1211                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1212
1213                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1214                     synaptics_is_pt_packet(psmouse->packet)) {
1215                         if (priv->pt_port)
1216                                 synaptics_pass_pt_packet(priv->pt_port,
1217                                                          psmouse->packet);
1218                 } else
1219                         synaptics_process_packet(psmouse);
1220
1221                 return PSMOUSE_FULL_PACKET;
1222         }
1223
1224         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1225                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1226 }
1227
1228 /*****************************************************************************
1229  *      Driver initialization/cleanup functions
1230  ****************************************************************************/
1231 static void set_abs_position_params(struct input_dev *dev,
1232                                     struct synaptics_device_info *info,
1233                                     int x_code, int y_code)
1234 {
1235         int x_min = info->x_min ?: XMIN_NOMINAL;
1236         int x_max = info->x_max ?: XMAX_NOMINAL;
1237         int y_min = info->y_min ?: YMIN_NOMINAL;
1238         int y_max = info->y_max ?: YMAX_NOMINAL;
1239         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1240                         SYN_REDUCED_FILTER_FUZZ : 0;
1241
1242         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1243         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1244         input_abs_set_res(dev, x_code, info->x_res);
1245         input_abs_set_res(dev, y_code, info->y_res);
1246 }
1247
1248 static int set_input_params(struct psmouse *psmouse,
1249                             struct synaptics_data *priv)
1250 {
1251         struct input_dev *dev = psmouse->dev;
1252         struct synaptics_device_info *info = &priv->info;
1253         int i;
1254         int error;
1255
1256         /* Reset default psmouse capabilities */
1257         __clear_bit(EV_REL, dev->evbit);
1258         bitmap_zero(dev->relbit, REL_CNT);
1259         bitmap_zero(dev->keybit, KEY_CNT);
1260
1261         /* Things that apply to both modes */
1262         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1263
1264         input_set_capability(dev, EV_KEY, BTN_LEFT);
1265
1266         /* Clickpads report only left button */
1267         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1268                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1269                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1270                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1271         }
1272
1273         if (!priv->absolute_mode) {
1274                 /* Relative mode */
1275                 input_set_capability(dev, EV_REL, REL_X);
1276                 input_set_capability(dev, EV_REL, REL_Y);
1277                 return 0;
1278         }
1279
1280         /* Absolute mode */
1281         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1282         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1283
1284         if (cr48_profile_sensor)
1285                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1286
1287         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1288                 set_abs_position_params(dev, info,
1289                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1290                 /* Image sensors can report per-contact pressure */
1291                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1292
1293                 error = input_mt_init_slots(dev, 2,
1294                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1295                 if (error)
1296                         return error;
1297
1298                 /* Image sensors can signal 4 and 5 finger clicks */
1299                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1300                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1301         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1302                 set_abs_position_params(dev, info,
1303                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1304                 /*
1305                  * Profile sensor in CR-48 tracks contacts reasonably well,
1306                  * other non-image sensors with AGM use semi-mt.
1307                  */
1308                 error = input_mt_init_slots(dev, 2,
1309                                             INPUT_MT_POINTER |
1310                                              (cr48_profile_sensor ?
1311                                               INPUT_MT_TRACK :
1312                                               INPUT_MT_SEMI_MT));
1313                 if (error)
1314                         return error;
1315
1316                 /*
1317                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1318                  * input_mt_report_pointer_emulation. But
1319                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1320                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1321                  * position. Let's re-initialize ABS_X/Y here.
1322                  */
1323                 if (!cr48_profile_sensor)
1324                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1325         }
1326
1327         if (SYN_CAP_PALMDETECT(info->capabilities))
1328                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1329
1330         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1331         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1332
1333         if (synaptics_has_multifinger(priv)) {
1334                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1335                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1336         }
1337
1338         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1339             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1340                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1341                 input_set_capability(dev, EV_KEY, BTN_BACK);
1342         }
1343
1344         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1345                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1346                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1347
1348         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1349                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1350                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1351                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1352                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1353         }
1354
1355         return 0;
1356 }
1357
1358 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1359                                               void *data, char *buf)
1360 {
1361         struct synaptics_data *priv = psmouse->private;
1362
1363         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1364 }
1365
1366 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1367                                              void *data, const char *buf,
1368                                              size_t len)
1369 {
1370         struct synaptics_data *priv = psmouse->private;
1371         unsigned int value;
1372         int err;
1373
1374         err = kstrtouint(buf, 10, &value);
1375         if (err)
1376                 return err;
1377
1378         if (value > 1)
1379                 return -EINVAL;
1380
1381         if (value == priv->disable_gesture)
1382                 return len;
1383
1384         priv->disable_gesture = value;
1385         if (value)
1386                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1387         else
1388                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1389
1390         if (synaptics_mode_cmd(psmouse, priv->mode))
1391                 return -EIO;
1392
1393         return len;
1394 }
1395
1396 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1397                     synaptics_show_disable_gesture,
1398                     synaptics_set_disable_gesture);
1399
1400 static void synaptics_disconnect(struct psmouse *psmouse)
1401 {
1402         struct synaptics_data *priv = psmouse->private;
1403
1404         /*
1405          * We might have left a breadcrumb when trying to
1406          * set up SMbus companion.
1407          */
1408         psmouse_smbus_cleanup(psmouse);
1409
1410         if (!priv->absolute_mode &&
1411                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1412                 device_remove_file(&psmouse->ps2dev.serio->dev,
1413                                    &psmouse_attr_disable_gesture.dattr);
1414
1415         synaptics_reset(psmouse);
1416         kfree(priv);
1417         psmouse->private = NULL;
1418 }
1419
1420 static int synaptics_reconnect(struct psmouse *psmouse)
1421 {
1422         struct synaptics_data *priv = psmouse->private;
1423         struct synaptics_device_info info;
1424         u8 param[2];
1425         int retry = 0;
1426         int error;
1427
1428         do {
1429                 psmouse_reset(psmouse);
1430                 if (retry) {
1431                         /*
1432                          * On some boxes, right after resuming, the touchpad
1433                          * needs some time to finish initializing (I assume
1434                          * it needs time to calibrate) and start responding
1435                          * to Synaptics-specific queries, so let's wait a
1436                          * bit.
1437                          */
1438                         ssleep(1);
1439                 }
1440                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1441                 error = synaptics_detect(psmouse, 0);
1442         } while (error && ++retry < 3);
1443
1444         if (error)
1445                 return error;
1446
1447         if (retry > 1)
1448                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1449
1450         error = synaptics_query_hardware(psmouse, &info);
1451         if (error) {
1452                 psmouse_err(psmouse, "Unable to query device.\n");
1453                 return error;
1454         }
1455
1456         error = synaptics_set_mode(psmouse);
1457         if (error) {
1458                 psmouse_err(psmouse, "Unable to initialize device.\n");
1459                 return error;
1460         }
1461
1462         if (info.identity != priv->info.identity ||
1463             info.model_id != priv->info.model_id ||
1464             info.capabilities != priv->info.capabilities ||
1465             info.ext_cap != priv->info.ext_cap) {
1466                 psmouse_err(psmouse,
1467                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1468                             priv->info.identity, info.identity,
1469                             priv->info.model_id, info.model_id,
1470                             priv->info.capabilities, info.capabilities,
1471                             priv->info.ext_cap, info.ext_cap);
1472                 return -ENXIO;
1473         }
1474
1475         return 0;
1476 }
1477
1478 static bool impaired_toshiba_kbc;
1479
1480 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1481 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1482         {
1483                 /* Toshiba Satellite */
1484                 .matches = {
1485                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1486                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1487                 },
1488         },
1489         {
1490                 /* Toshiba Dynabook */
1491                 .matches = {
1492                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1493                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1494                 },
1495         },
1496         {
1497                 /* Toshiba Portege M300 */
1498                 .matches = {
1499                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1500                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1501                 },
1502
1503         },
1504         {
1505                 /* Toshiba Portege M300 */
1506                 .matches = {
1507                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1508                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1509                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1510                 },
1511
1512         },
1513 #endif
1514         { }
1515 };
1516
1517 static bool broken_olpc_ec;
1518
1519 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1520 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1521         {
1522                 /* OLPC XO-1 or XO-1.5 */
1523                 .matches = {
1524                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1525                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1526                 },
1527         },
1528 #endif
1529         { }
1530 };
1531
1532 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1533 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1534         {
1535                 /* Cr-48 Chromebook (Codename Mario) */
1536                 .matches = {
1537                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1538                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1539                 },
1540         },
1541 #endif
1542         { }
1543 };
1544
1545 void __init synaptics_module_init(void)
1546 {
1547         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1548         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1549         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1550 }
1551
1552 static int synaptics_init_ps2(struct psmouse *psmouse,
1553                               struct synaptics_device_info *info,
1554                               bool absolute_mode)
1555 {
1556         struct synaptics_data *priv;
1557         int err;
1558
1559         synaptics_apply_quirks(psmouse, info);
1560
1561         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1562         if (!priv)
1563                 return -ENOMEM;
1564
1565         priv->info = *info;
1566         priv->absolute_mode = absolute_mode;
1567         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1568                 priv->disable_gesture = true;
1569
1570         /*
1571          * Unfortunately ForcePad capability is not exported over PS/2,
1572          * so we have to resort to checking PNP IDs.
1573          */
1574         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1575
1576         err = synaptics_set_mode(psmouse);
1577         if (err) {
1578                 psmouse_err(psmouse, "Unable to initialize device.\n");
1579                 goto init_fail;
1580         }
1581
1582         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1583                                         SYN_NEWABS : SYN_OLDABS;
1584
1585         psmouse_info(psmouse,
1586                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1587                      SYN_ID_MODEL(info->identity),
1588                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1589                      info->model_id,
1590                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1591                      info->ext_cap_10, info->board_id, info->firmware_id);
1592
1593         err = set_input_params(psmouse, priv);
1594         if (err) {
1595                 psmouse_err(psmouse,
1596                             "failed to set up capabilities: %d\n", err);
1597                 goto init_fail;
1598         }
1599
1600         /*
1601          * Encode touchpad model so that it can be used to set
1602          * input device->id.version and be visible to userspace.
1603          * Because version is __u16 we have to drop something.
1604          * Hardware info bits seem to be good candidates as they
1605          * are documented to be for Synaptics corp. internal use.
1606          */
1607         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1608                           (info->model_id & 0x000000ff);
1609
1610         if (absolute_mode) {
1611                 psmouse->protocol_handler = synaptics_process_byte;
1612                 psmouse->pktsize = 6;
1613         } else {
1614                 /* Relative mode follows standard PS/2 mouse protocol */
1615                 psmouse->protocol_handler = psmouse_process_byte;
1616                 psmouse->pktsize = 3;
1617         }
1618
1619         psmouse->set_rate = synaptics_set_rate;
1620         psmouse->disconnect = synaptics_disconnect;
1621         psmouse->reconnect = synaptics_reconnect;
1622         psmouse->fast_reconnect = NULL;
1623         psmouse->cleanup = synaptics_reset;
1624         /* Synaptics can usually stay in sync without extra help */
1625         psmouse->resync_time = 0;
1626
1627         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1628                 synaptics_pt_create(psmouse);
1629
1630         /*
1631          * Toshiba's KBC seems to have trouble handling data from
1632          * Synaptics at full rate.  Switch to a lower rate (roughly
1633          * the same rate as a standard PS/2 mouse).
1634          */
1635         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1636                 psmouse_info(psmouse,
1637                              "Toshiba %s detected, limiting rate to 40pps.\n",
1638                              dmi_get_system_info(DMI_PRODUCT_NAME));
1639                 psmouse->rate = 40;
1640         }
1641
1642         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1643                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1644                                          &psmouse_attr_disable_gesture.dattr);
1645                 if (err) {
1646                         psmouse_err(psmouse,
1647                                     "Failed to create disable_gesture attribute (%d)",
1648                                     err);
1649                         goto init_fail;
1650                 }
1651         }
1652
1653         return 0;
1654
1655  init_fail:
1656         kfree(priv);
1657         return err;
1658 }
1659
1660 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1661 {
1662         struct synaptics_device_info info;
1663         int error;
1664
1665         psmouse_reset(psmouse);
1666
1667         error = synaptics_query_hardware(psmouse, &info);
1668         if (error) {
1669                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1670                 return error;
1671         }
1672
1673         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1674 }
1675
1676 int synaptics_init_absolute(struct psmouse *psmouse)
1677 {
1678         return __synaptics_init(psmouse, true);
1679 }
1680
1681 int synaptics_init_relative(struct psmouse *psmouse)
1682 {
1683         return __synaptics_init(psmouse, false);
1684 }
1685
1686 static int synaptics_setup_ps2(struct psmouse *psmouse,
1687                                struct synaptics_device_info *info)
1688 {
1689         bool absolute_mode = true;
1690         int error;
1691
1692         /*
1693          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1694          * packet spew overloads the EC such that key presses on the keyboard
1695          * are missed.  Given that, don't even attempt to use Absolute mode.
1696          * Relative mode seems to work just fine.
1697          */
1698         if (broken_olpc_ec) {
1699                 psmouse_info(psmouse,
1700                              "OLPC XO detected, forcing relative protocol.\n");
1701                 absolute_mode = false;
1702         }
1703
1704         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1705         if (error)
1706                 return error;
1707
1708         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1709 }
1710
1711 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1712
1713 void __init synaptics_module_init(void)
1714 {
1715 }
1716
1717 static int __maybe_unused
1718 synaptics_setup_ps2(struct psmouse *psmouse,
1719                     struct synaptics_device_info *info)
1720 {
1721         return -ENOSYS;
1722 }
1723
1724 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1725
1726 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1727
1728 /*
1729  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1730  * provides a better bandwidth and allow a better control of the touchpads.
1731  * This is used to decide if we need to use this bus or not.
1732  */
1733 enum {
1734         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1735         SYNAPTICS_INTERTOUCH_OFF,
1736         SYNAPTICS_INTERTOUCH_ON,
1737 };
1738
1739 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1740                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1741 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1742 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1743
1744 static int synaptics_create_intertouch(struct psmouse *psmouse,
1745                                        struct synaptics_device_info *info,
1746                                        bool leave_breadcrumbs)
1747 {
1748         bool topbuttonpad =
1749                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1750                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1751         const struct rmi_device_platform_data pdata = {
1752                 .reset_delay_ms = 30,
1753                 .sensor_pdata = {
1754                         .sensor_type = rmi_sensor_touchpad,
1755                         .axis_align.flip_y = true,
1756                         .kernel_tracking = false,
1757                         .topbuttonpad = topbuttonpad,
1758                 },
1759                 .gpio_data = {
1760                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1761                         .trackstick_buttons =
1762                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1763                 },
1764         };
1765         const struct i2c_board_info intertouch_board = {
1766                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1767                 .flags = I2C_CLIENT_HOST_NOTIFY,
1768         };
1769
1770         return psmouse_smbus_init(psmouse, &intertouch_board,
1771                                   &pdata, sizeof(pdata), true,
1772                                   leave_breadcrumbs);
1773 }
1774
1775 /**
1776  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1777  * and decides to instantiate a SMBus InterTouch device.
1778  */
1779 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1780                                       struct synaptics_device_info *info,
1781                                       bool leave_breadcrumbs)
1782 {
1783         int error;
1784
1785         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1786                 return -ENXIO;
1787
1788         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1789                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1790                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1791
1792                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1793                                 psmouse_info(psmouse,
1794                                              "Your touchpad (%s) says it can support a different bus. "
1795                                              "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.\n",
1796                                              psmouse->ps2dev.serio->firmware_id);
1797
1798                         return -ENXIO;
1799                 }
1800         }
1801
1802         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1803
1804         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1805         if (error) {
1806                 if (error == -EAGAIN)
1807                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1808                 else
1809                         psmouse_err(psmouse, "unable to create intertouch device\n");
1810
1811                 return error;
1812         }
1813
1814         return 0;
1815 }
1816
1817 int synaptics_init_smbus(struct psmouse *psmouse)
1818 {
1819         struct synaptics_device_info info;
1820         int error;
1821
1822         psmouse_reset(psmouse);
1823
1824         error = synaptics_query_hardware(psmouse, &info);
1825         if (error) {
1826                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1827                 return error;
1828         }
1829
1830         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1831                 return -ENXIO;
1832
1833         return synaptics_create_intertouch(psmouse, &info, false);
1834 }
1835
1836 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1837
1838 static int __maybe_unused
1839 synaptics_setup_intertouch(struct psmouse *psmouse,
1840                            struct synaptics_device_info *info,
1841                            bool leave_breadcrumbs)
1842 {
1843         return -ENOSYS;
1844 }
1845
1846 int synaptics_init_smbus(struct psmouse *psmouse)
1847 {
1848         return -ENOSYS;
1849 }
1850
1851 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1852
1853 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1854     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1855
1856 int synaptics_init(struct psmouse *psmouse)
1857 {
1858         struct synaptics_device_info info;
1859         int error;
1860         int retval;
1861
1862         psmouse_reset(psmouse);
1863
1864         error = synaptics_query_hardware(psmouse, &info);
1865         if (error) {
1866                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1867                 return error;
1868         }
1869
1870         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1871                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1872                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1873                     /* Forcepads need F21, which is not ready */
1874                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1875                         psmouse_warn(psmouse,
1876                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1877                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1878                 }
1879
1880                 error = synaptics_setup_intertouch(psmouse, &info, true);
1881                 if (!error)
1882                         return PSMOUSE_SYNAPTICS_SMBUS;
1883         }
1884
1885         retval = synaptics_setup_ps2(psmouse, &info);
1886         if (retval < 0) {
1887                 /*
1888                  * Not using any flavor of Synaptics support, so clean up
1889                  * SMbus breadcrumbs, if any.
1890                  */
1891                 psmouse_smbus_cleanup(psmouse);
1892         }
1893
1894         return retval;
1895 }
1896
1897 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1898
1899 int synaptics_init(struct psmouse *psmouse)
1900 {
1901         return -ENOSYS;
1902 }
1903
1904 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */