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         "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         "LEN005b", /* P50 */
 171         "LEN005e", /* T560 */
 172         "LEN0071", /* T480 */
 173         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 174         "LEN0073", /* X1 Carbon G5 (Elantech) */
 175         "LEN0092", /* X1 Carbon 6 */
 176         "LEN0093", /* T480 */
 177         "LEN0096", /* X280 */
 178         "LEN0097", /* X280 -> ALPS trackpoint */
 179         "LEN009b", /* T580 */
 180         "LEN200f", /* T450s */
 181         "LEN2054", /* E480 */
 182         "LEN2055", /* E580 */
 183         "SYN3052", /* HP EliteBook 840 G4 */
 184         "SYN3221", /* HP 15-ay000 */
 185         "SYN323d", /* HP Spectre X360 13-w013dx */
 186         NULL
 187 };
 188
 189 static const char * const forcepad_pnp_ids[] = {
 190         "SYN300D",
 191         "SYN3014",
 192         NULL
 193 };
 194
 195 /*
 196  * Send a command to the synpatics touchpad by special commands
 197  */
 198 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 199 {
 200         int error;
 201
 202         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 203         if (error)
 204                 return error;
 205
 206         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 207         if (error)
 208                 return error;
 209
 210         return 0;
 211 }
 212
 213 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 214 {
 215         int error;
 216         union {
 217                 __be32 be_val;
 218                 char buf[4];
 219         } resp = { 0 };
 220
 221         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 222         if (error)
 223                 return error;
 224
 225         *val = be32_to_cpu(resp.be_val);
 226         return 0;
 227 }
 228
 229 /*
 230  * Identify Touchpad
 231  * See also the SYN_ID_* macros
 232  */
 233 static int synaptics_identify(struct psmouse *psmouse,
 234                               struct synaptics_device_info *info)
 235 {
 236         int error;
 237
 238         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 239         if (error)
 240                 return error;
 241
 242         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 243 }
 244
 245 /*
 246  * Read the model-id bytes from the touchpad
 247  * see also SYN_MODEL_* macros
 248  */
 249 static int synaptics_model_id(struct psmouse *psmouse,
 250                               struct synaptics_device_info *info)
 251 {
 252         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 253 }
 254
 255 /*
 256  * Read the firmware id from the touchpad
 257  */
 258 static int synaptics_firmware_id(struct psmouse *psmouse,
 259                                  struct synaptics_device_info *info)
 260 {
 261         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 262                                    &info->firmware_id);
 263 }
 264
 265 /*
 266  * Read the board id and the "More Extended Queries" from the touchpad
 267  * The board id is encoded in the "QUERY MODES" response
 268  */
 269 static int synaptics_query_modes(struct psmouse *psmouse,
 270                                  struct synaptics_device_info *info)
 271 {
 272         u8 bid[3];
 273         int error;
 274
 275         /* firmwares prior 7.5 have no board_id encoded */
 276         if (SYN_ID_FULL(info->identity) < 0x705)
 277                 return 0;
 278
 279         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 280         if (error)
 281                 return error;
 282
 283         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 284
 285         if (SYN_MEXT_CAP_BIT(bid[0]))
 286                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 287                                            &info->ext_cap_10);
 288
 289         return 0;
 290 }
 291
 292 /*
 293  * Read the capability-bits from the touchpad
 294  * see also the SYN_CAP_* macros
 295  */
 296 static int synaptics_capability(struct psmouse *psmouse,
 297                                 struct synaptics_device_info *info)
 298 {
 299         int error;
 300
 301         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 302                                     &info->capabilities);
 303         if (error)
 304                 return error;
 305
 306         info->ext_cap = info->ext_cap_0c = 0;
 307
 308         /*
 309          * Older firmwares had submodel ID fixed to 0x47
 310          */
 311         if (SYN_ID_FULL(info->identity) < 0x705 &&
 312             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 313                 return -ENXIO;
 314         }
 315
 316         /*
 317          * Unless capExtended is set the rest of the flags should be ignored
 318          */
 319         if (!SYN_CAP_EXTENDED(info->capabilities))
 320                 info->capabilities = 0;
 321
 322         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 323                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 324                                             &info->ext_cap);
 325                 if (error) {
 326                         psmouse_warn(psmouse,
 327                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 328                 } else {
 329                         /*
 330                          * if nExtBtn is greater than 8 it should be considered
 331                          * invalid and treated as 0
 332                          */
 333                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 334                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 335                 }
 336         }
 337
 338         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 339                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 340                                             &info->ext_cap_0c);
 341                 if (error)
 342                         psmouse_warn(psmouse,
 343                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 344         }
 345
 346         return 0;
 347 }
 348
 349 /*
 350  * Read touchpad resolution and maximum reported coordinates
 351  * Resolution is left zero if touchpad does not support the query
 352  */
 353 static int synaptics_resolution(struct psmouse *psmouse,
 354                                 struct synaptics_device_info *info)
 355 {
 356         u8 resp[3];
 357         int error;
 358
 359         if (SYN_ID_MAJOR(info->identity) < 4)
 360                 return 0;
 361
 362         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 363         if (!error) {
 364                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 365                         info->x_res = resp[0]; /* x resolution in units/mm */
 366                         info->y_res = resp[2]; /* y resolution in units/mm */
 367                 }
 368         }
 369
 370         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 371             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 372                 error = synaptics_send_cmd(psmouse,
 373                                            SYN_QUE_EXT_MAX_COORDS, resp);
 374                 if (error) {
 375                         psmouse_warn(psmouse,
 376                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 377                 } else {
 378                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 379                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 380                         psmouse_info(psmouse,
 381                                      "queried max coordinates: x [..%d], y [..%d]\n",
 382                                      info->x_max, info->y_max);
 383                 }
 384         }
 385
 386         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 387             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 388              /*
 389               * Firmware v8.1 does not report proper number of extended
 390               * capabilities, but has been proven to report correct min
 391               * coordinates.
 392               */
 393              SYN_ID_FULL(info->identity) == 0x801)) {
 394                 error = synaptics_send_cmd(psmouse,
 395                                            SYN_QUE_EXT_MIN_COORDS, resp);
 396                 if (error) {
 397                         psmouse_warn(psmouse,
 398                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 399                 } else {
 400                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 401                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 402                         psmouse_info(psmouse,
 403                                      "queried min coordinates: x [%d..], y [%d..]\n",
 404                                      info->x_min, info->y_min);
 405                 }
 406         }
 407
 408         return 0;
 409 }
 410
 411 static int synaptics_query_hardware(struct psmouse *psmouse,
 412                                     struct synaptics_device_info *info)
 413 {
 414         int error;
 415
 416         memset(info, 0, sizeof(*info));
 417
 418         error = synaptics_identify(psmouse, info);
 419         if (error)
 420                 return error;
 421
 422         error = synaptics_model_id(psmouse, info);
 423         if (error)
 424                 return error;
 425
 426         error = synaptics_firmware_id(psmouse, info);
 427         if (error)
 428                 return error;
 429
 430         error = synaptics_query_modes(psmouse, info);
 431         if (error)
 432                 return error;
 433
 434         error = synaptics_capability(psmouse, info);
 435         if (error)
 436                 return error;
 437
 438         error = synaptics_resolution(psmouse, info);
 439         if (error)
 440                 return error;
 441
 442         return 0;
 443 }
 444
 445 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 446
 447 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 448
 449 static bool cr48_profile_sensor;
 450
 451 #define ANY_BOARD_ID 0
 452 struct min_max_quirk {
 453         const char * const *pnp_ids;
 454         struct {
 455                 u32 min, max;
 456         } board_id;
 457         u32 x_min, x_max, y_min, y_max;
 458 };
 459
 460 static const struct min_max_quirk min_max_pnpid_table[] = {
 461         {
 462                 (const char * const []){"LEN0033", NULL},
 463                 {ANY_BOARD_ID, ANY_BOARD_ID},
 464                 1024, 5052, 2258, 4832
 465         },
 466         {
 467                 (const char * const []){"LEN0042", NULL},
 468                 {ANY_BOARD_ID, ANY_BOARD_ID},
 469                 1232, 5710, 1156, 4696
 470         },
 471         {
 472                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 473                                         "LEN0039", "LEN2002", "LEN2004",
 474                                         NULL},
 475                 {ANY_BOARD_ID, 2961},
 476                 1024, 5112, 2024, 4832
 477         },
 478         {
 479                 (const char * const []){"LEN2000", NULL},
 480                 {ANY_BOARD_ID, ANY_BOARD_ID},
 481                 1024, 5113, 2021, 4832
 482         },
 483         {
 484                 (const char * const []){"LEN2001", NULL},
 485                 {ANY_BOARD_ID, ANY_BOARD_ID},
 486                 1024, 5022, 2508, 4832
 487         },
 488         {
 489                 (const char * const []){"LEN2006", NULL},
 490                 {2691, 2691},
 491                 1024, 5045, 2457, 4832
 492         },
 493         {
 494                 (const char * const []){"LEN2006", NULL},
 495                 {ANY_BOARD_ID, ANY_BOARD_ID},
 496                 1264, 5675, 1171, 4688
 497         },
 498         { }
 499 };
 500
 501 /*****************************************************************************
 502  *      Synaptics communications functions
 503  ****************************************************************************/
 504
 505 /*
 506  * Synaptics touchpads report the y coordinate from bottom to top, which is
 507  * opposite from what userspace expects.
 508  * This function is used to invert y before reporting.
 509  */
 510 static int synaptics_invert_y(int y)
 511 {
 512         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 513 }
 514
 515 /*
 516  * Apply quirk(s) if the hardware matches
 517  */
 518 static void synaptics_apply_quirks(struct psmouse *psmouse,
 519                                    struct synaptics_device_info *info)
 520 {
 521         int i;
 522
 523         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 524                 if (!psmouse_matches_pnp_id(psmouse,
 525                                             min_max_pnpid_table[i].pnp_ids))
 526                         continue;
 527
 528                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 529                     info->board_id < min_max_pnpid_table[i].board_id.min)
 530                         continue;
 531
 532                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 533                     info->board_id > min_max_pnpid_table[i].board_id.max)
 534                         continue;
 535
 536                 info->x_min = min_max_pnpid_table[i].x_min;
 537                 info->x_max = min_max_pnpid_table[i].x_max;
 538                 info->y_min = min_max_pnpid_table[i].y_min;
 539                 info->y_max = min_max_pnpid_table[i].y_max;
 540                 psmouse_info(psmouse,
 541                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 542                              info->x_min, info->x_max,
 543                              info->y_min, info->y_max);
 544                 break;
 545         }
 546 }
 547
 548 static bool synaptics_has_agm(struct synaptics_data *priv)
 549 {
 550         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 551                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 552 }
 553
 554 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 555 {
 556         static u8 param = 0xc8;
 557         int error;
 558
 559         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 560         if (error)
 561                 return error;
 562
 563         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 564         if (error)
 565                 return error;
 566
 567         return 0;
 568 }
 569
 570 static int synaptics_set_mode(struct psmouse *psmouse)
 571 {
 572         struct synaptics_data *priv = psmouse->private;
 573         int error;
 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         error = synaptics_mode_cmd(psmouse, priv->mode);
 586         if (error)
 587                 return error;
 588
 589         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 590                 error = synaptics_set_advanced_gesture_mode(psmouse);
 591                 if (error) {
 592                         psmouse_err(psmouse,
 593                                     "Advanced gesture mode init failed: %d\n",
 594                                     error);
 595                         return error;
 596                 }
 597         }
 598
 599         return 0;
 600 }
 601
 602 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 603 {
 604         struct synaptics_data *priv = psmouse->private;
 605
 606         if (rate >= 80) {
 607                 priv->mode |= SYN_BIT_HIGH_RATE;
 608                 psmouse->rate = 80;
 609         } else {
 610                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 611                 psmouse->rate = 40;
 612         }
 613
 614         synaptics_mode_cmd(psmouse, priv->mode);
 615 }
 616
 617 /*****************************************************************************
 618  *      Synaptics pass-through PS/2 port support
 619  ****************************************************************************/
 620 static int synaptics_pt_write(struct serio *serio, u8 c)
 621 {
 622         struct psmouse *parent = serio_get_drvdata(serio->parent);
 623         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 624         int error;
 625
 626         error = ps2_sliced_command(&parent->ps2dev, c);
 627         if (error)
 628                 return error;
 629
 630         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 631         if (error)
 632                 return error;
 633
 634         return 0;
 635 }
 636
 637 static int synaptics_pt_start(struct serio *serio)
 638 {
 639         struct psmouse *parent = serio_get_drvdata(serio->parent);
 640         struct synaptics_data *priv = parent->private;
 641
 642         serio_pause_rx(parent->ps2dev.serio);
 643         priv->pt_port = serio;
 644         serio_continue_rx(parent->ps2dev.serio);
 645
 646         return 0;
 647 }
 648
 649 static void synaptics_pt_stop(struct serio *serio)
 650 {
 651         struct psmouse *parent = serio_get_drvdata(serio->parent);
 652         struct synaptics_data *priv = parent->private;
 653
 654         serio_pause_rx(parent->ps2dev.serio);
 655         priv->pt_port = NULL;
 656         serio_continue_rx(parent->ps2dev.serio);
 657 }
 658
 659 static int synaptics_is_pt_packet(u8 *buf)
 660 {
 661         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 662 }
 663
 664 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 665 {
 666         struct psmouse *child = serio_get_drvdata(ptport);
 667
 668         if (child && child->state == PSMOUSE_ACTIVATED) {
 669                 serio_interrupt(ptport, packet[1], 0);
 670                 serio_interrupt(ptport, packet[4], 0);
 671                 serio_interrupt(ptport, packet[5], 0);
 672                 if (child->pktsize == 4)
 673                         serio_interrupt(ptport, packet[2], 0);
 674         } else {
 675                 serio_interrupt(ptport, packet[1], 0);
 676         }
 677 }
 678
 679 static void synaptics_pt_activate(struct psmouse *psmouse)
 680 {
 681         struct synaptics_data *priv = psmouse->private;
 682         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 683
 684         /* adjust the touchpad to child's choice of protocol */
 685         if (child) {
 686                 if (child->pktsize == 4)
 687                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 688                 else
 689                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 690
 691                 if (synaptics_mode_cmd(psmouse, priv->mode))
 692                         psmouse_warn(psmouse,
 693                                      "failed to switch guest protocol\n");
 694         }
 695 }
 696
 697 static void synaptics_pt_create(struct psmouse *psmouse)
 698 {
 699         struct serio *serio;
 700
 701         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 702         if (!serio) {
 703                 psmouse_err(psmouse,
 704                             "not enough memory for pass-through port\n");
 705                 return;
 706         }
 707
 708         serio->id.type = SERIO_PS_PSTHRU;
 709         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 710         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
 711         serio->write = synaptics_pt_write;
 712         serio->start = synaptics_pt_start;
 713         serio->stop = synaptics_pt_stop;
 714         serio->parent = psmouse->ps2dev.serio;
 715
 716         psmouse->pt_activate = synaptics_pt_activate;
 717
 718         psmouse_info(psmouse, "serio: %s port at %s\n",
 719                      serio->name, psmouse->phys);
 720         serio_register_port(serio);
 721 }
 722
 723 /*****************************************************************************
 724  *      Functions to interpret the absolute mode packets
 725  ****************************************************************************/
 726
 727 static void synaptics_parse_agm(const u8 buf[],
 728                                 struct synaptics_data *priv,
 729                                 struct synaptics_hw_state *hw)
 730 {
 731         struct synaptics_hw_state *agm = &priv->agm;
 732         int agm_packet_type;
 733
 734         agm_packet_type = (buf[5] & 0x30) >> 4;
 735         switch (agm_packet_type) {
 736         case 1:
 737                 /* Gesture packet: (x, y, z) half resolution */
 738                 agm->w = hw->w;
 739                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 740                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 741                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 742                 break;
 743
 744         case 2:
 745                 /* AGM-CONTACT packet: we are only interested in the count */
 746                 priv->agm_count = buf[1];
 747                 break;
 748
 749         default:
 750                 break;
 751         }
 752 }
 753
 754 static void synaptics_parse_ext_buttons(const u8 buf[],
 755                                         struct synaptics_data *priv,
 756                                         struct synaptics_hw_state *hw)
 757 {
 758         unsigned int ext_bits =
 759                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 760         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 761
 762         hw->ext_buttons = buf[4] & ext_mask;
 763         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 764 }
 765
 766 static int synaptics_parse_hw_state(const u8 buf[],
 767                                     struct synaptics_data *priv,
 768                                     struct synaptics_hw_state *hw)
 769 {
 770         memset(hw, 0, sizeof(struct synaptics_hw_state));
 771
 772         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 773                 hw->w = (((buf[0] & 0x30) >> 2) |
 774                          ((buf[0] & 0x04) >> 1) |
 775                          ((buf[3] & 0x04) >> 2));
 776
 777                 if (synaptics_has_agm(priv) && hw->w == 2) {
 778                         synaptics_parse_agm(buf, priv, hw);
 779                         return 1;
 780                 }
 781
 782                 hw->x = (((buf[3] & 0x10) << 8) |
 783                          ((buf[1] & 0x0f) << 8) |
 784                          buf[4]);
 785                 hw->y = (((buf[3] & 0x20) << 7) |
 786                          ((buf[1] & 0xf0) << 4) |
 787                          buf[5]);
 788                 hw->z = buf[2];
 789
 790                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 791                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 792
 793                 if (priv->is_forcepad) {
 794                         /*
 795                          * ForcePads, like Clickpads, use middle button
 796                          * bits to report primary button clicks.
 797                          * Unfortunately they report primary button not
 798                          * only when user presses on the pad above certain
 799                          * threshold, but also when there are more than one
 800                          * finger on the touchpad, which interferes with
 801                          * out multi-finger gestures.
 802                          */
 803                         if (hw->z == 0) {
 804                                 /* No contacts */
 805                                 priv->press = priv->report_press = false;
 806                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 807                                 /*
 808                                  * Single-finger touch with pressure above
 809                                  * the threshold. If pressure stays long
 810                                  * enough, we'll start reporting primary
 811                                  * button. We rely on the device continuing
 812                                  * sending data even if finger does not
 813                                  * move.
 814                                  */
 815                                 if  (!priv->press) {
 816                                         priv->press_start = jiffies;
 817                                         priv->press = true;
 818                                 } else if (time_after(jiffies,
 819                                                 priv->press_start +
 820                                                         msecs_to_jiffies(50))) {
 821                                         priv->report_press = true;
 822                                 }
 823                         } else {
 824                                 priv->press = false;
 825                         }
 826
 827                         hw->left = priv->report_press;
 828
 829                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 830                         /*
 831                          * Clickpad's button is transmitted as middle button,
 832                          * however, since it is primary button, we will report
 833                          * it as BTN_LEFT.
 834                          */
 835                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 836
 837                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 838                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 839                         if (hw->w == 2)
 840                                 hw->scroll = (s8)buf[1];
 841                 }
 842
 843                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 844                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 845                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 846                 }
 847
 848                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 849                     ((buf[0] ^ buf[3]) & 0x02)) {
 850                         synaptics_parse_ext_buttons(buf, priv, hw);
 851                 }
 852         } else {
 853                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 854                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 855
 856                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 857                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 858
 859                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 860                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 861         }
 862
 863         /*
 864          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 865          * is used by some firmware to indicate a finger at the edge of
 866          * the touchpad whose precise position cannot be determined, so
 867          * convert these values to the maximum axis value.
 868          */
 869         if (hw->x > X_MAX_POSITIVE)
 870                 hw->x -= 1 << ABS_POS_BITS;
 871         else if (hw->x == X_MAX_POSITIVE)
 872                 hw->x = XMAX;
 873
 874         if (hw->y > Y_MAX_POSITIVE)
 875                 hw->y -= 1 << ABS_POS_BITS;
 876         else if (hw->y == Y_MAX_POSITIVE)
 877                 hw->y = YMAX;
 878
 879         return 0;
 880 }
 881
 882 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 883                                           bool active, int x, int y)
 884 {
 885         input_mt_slot(dev, slot);
 886         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 887         if (active) {
 888                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 889                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 890         }
 891 }
 892
 893 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 894                                           const struct synaptics_hw_state *a,
 895                                           const struct synaptics_hw_state *b,
 896                                           int num_fingers)
 897 {
 898         if (num_fingers >= 2) {
 899                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 900                                               min(a->y, b->y));
 901                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 902                                               max(a->y, b->y));
 903         } else if (num_fingers == 1) {
 904                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 905                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 906         } else {
 907                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 908                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 909         }
 910 }
 911
 912 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 913                                          const struct synaptics_hw_state *hw)
 914 {
 915         struct input_dev *dev = psmouse->dev;
 916         struct synaptics_data *priv = psmouse->private;
 917         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 918         int i;
 919
 920         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 921                 return;
 922
 923         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 924         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 925              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 926             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 927                 return;
 928
 929         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 930                 for (i = 0; i < ext_bits; i++) {
 931                         input_report_key(dev, BTN_0 + 2 * i,
 932                                 hw->ext_buttons & BIT(i));
 933                         input_report_key(dev, BTN_1 + 2 * i,
 934                                 hw->ext_buttons & BIT(i + ext_bits));
 935                 }
 936                 return;
 937         }
 938
 939         /*
 940          * This generation of touchpads has the trackstick buttons
 941          * physically wired to the touchpad. Re-route them through
 942          * the pass-through interface.
 943          */
 944         if (priv->pt_port) {
 945                 u8 pt_buttons;
 946
 947                 /* The trackstick expects at most 3 buttons */
 948                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 949                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 950                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 951
 952                 serio_interrupt(priv->pt_port,
 953                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 954                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 955         }
 956 }
 957
 958 static void synaptics_report_buttons(struct psmouse *psmouse,
 959                                      const struct synaptics_hw_state *hw)
 960 {
 961         struct input_dev *dev = psmouse->dev;
 962         struct synaptics_data *priv = psmouse->private;
 963
 964         input_report_key(dev, BTN_LEFT, hw->left);
 965         input_report_key(dev, BTN_RIGHT, hw->right);
 966
 967         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 968                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 969
 970         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 971                 input_report_key(dev, BTN_FORWARD, hw->up);
 972                 input_report_key(dev, BTN_BACK, hw->down);
 973         }
 974
 975         synaptics_report_ext_buttons(psmouse, hw);
 976 }
 977
 978 static void synaptics_report_mt_data(struct psmouse *psmouse,
 979                                      const struct synaptics_hw_state *sgm,
 980                                      int num_fingers)
 981 {
 982         struct input_dev *dev = psmouse->dev;
 983         struct synaptics_data *priv = psmouse->private;
 984         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 985         struct input_mt_pos pos[2];
 986         int slot[2], nsemi, i;
 987
 988         nsemi = clamp_val(num_fingers, 0, 2);
 989
 990         for (i = 0; i < nsemi; i++) {
 991                 pos[i].x = hw[i]->x;
 992                 pos[i].y = synaptics_invert_y(hw[i]->y);
 993         }
 994
 995         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
 996
 997         for (i = 0; i < nsemi; i++) {
 998                 input_mt_slot(dev, slot[i]);
 999                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1000                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1001                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1002                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1003         }
1004
1005         input_mt_drop_unused(dev);
1006
1007         /* Don't use active slot count to generate BTN_TOOL events. */
1008         input_mt_report_pointer_emulation(dev, false);
1009
1010         /* Send the number of fingers reported by touchpad itself. */
1011         input_mt_report_finger_count(dev, num_fingers);
1012
1013         synaptics_report_buttons(psmouse, sgm);
1014
1015         input_sync(dev);
1016 }
1017
1018 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1019                                            struct synaptics_hw_state *sgm)
1020 {
1021         struct synaptics_data *priv = psmouse->private;
1022         int num_fingers;
1023
1024         /*
1025          * Update mt_state using the new finger count and current mt_state.
1026          */
1027         if (sgm->z == 0)
1028                 num_fingers = 0;
1029         else if (sgm->w >= 4)
1030                 num_fingers = 1;
1031         else if (sgm->w == 0)
1032                 num_fingers = 2;
1033         else if (sgm->w == 1)
1034                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1035         else
1036                 num_fingers = 4;
1037
1038         /* Send resulting input events to user space */
1039         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1040 }
1041
1042 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1043 {
1044         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1045                 return true;
1046
1047         /* Advanced gesture mode also sends multi finger data */
1048         return synaptics_has_agm(priv);
1049 }
1050
1051 /*
1052  *  called for each full received packet from the touchpad
1053  */
1054 static void synaptics_process_packet(struct psmouse *psmouse)
1055 {
1056         struct input_dev *dev = psmouse->dev;
1057         struct synaptics_data *priv = psmouse->private;
1058         struct synaptics_device_info *info = &priv->info;
1059         struct synaptics_hw_state hw;
1060         int num_fingers;
1061         int finger_width;
1062
1063         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1064                 return;
1065
1066         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1067                 synaptics_image_sensor_process(psmouse, &hw);
1068                 return;
1069         }
1070
1071         if (hw.scroll) {
1072                 priv->scroll += hw.scroll;
1073
1074                 while (priv->scroll >= 4) {
1075                         input_report_key(dev, BTN_BACK, !hw.down);
1076                         input_sync(dev);
1077                         input_report_key(dev, BTN_BACK, hw.down);
1078                         input_sync(dev);
1079                         priv->scroll -= 4;
1080                 }
1081                 while (priv->scroll <= -4) {
1082                         input_report_key(dev, BTN_FORWARD, !hw.up);
1083                         input_sync(dev);
1084                         input_report_key(dev, BTN_FORWARD, hw.up);
1085                         input_sync(dev);
1086                         priv->scroll += 4;
1087                 }
1088                 return;
1089         }
1090
1091         if (hw.z > 0 && hw.x > 1) {
1092                 num_fingers = 1;
1093                 finger_width = 5;
1094                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1095                         switch (hw.w) {
1096                         case 0 ... 1:
1097                                 if (synaptics_has_multifinger(priv))
1098                                         num_fingers = hw.w + 2;
1099                                 break;
1100                         case 2:
1101                                 if (SYN_MODEL_PEN(info->model_id))
1102                                         ;   /* Nothing, treat a pen as a single finger */
1103                                 break;
1104                         case 4 ... 15:
1105                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1106                                         finger_width = hw.w;
1107                                 break;
1108                         }
1109                 }
1110         } else {
1111                 num_fingers = 0;
1112                 finger_width = 0;
1113         }
1114
1115         if (cr48_profile_sensor) {
1116                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1117                 return;
1118         }
1119
1120         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1121                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1122                                               num_fingers);
1123
1124         /* Post events
1125          * BTN_TOUCH has to be first as mousedev relies on it when doing
1126          * absolute -> relative conversion
1127          */
1128         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1129         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1130
1131         if (num_fingers > 0) {
1132                 input_report_abs(dev, ABS_X, hw.x);
1133                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1134         }
1135         input_report_abs(dev, ABS_PRESSURE, hw.z);
1136
1137         if (SYN_CAP_PALMDETECT(info->capabilities))
1138                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1139
1140         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1141         if (synaptics_has_multifinger(priv)) {
1142                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1143                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1144         }
1145
1146         synaptics_report_buttons(psmouse, &hw);
1147
1148         input_sync(dev);
1149 }
1150
1151 static bool synaptics_validate_byte(struct psmouse *psmouse,
1152                                     int idx, enum synaptics_pkt_type pkt_type)
1153 {
1154         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1155         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1156         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1157         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1158         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1159         const u8 *packet = psmouse->packet;
1160
1161         if (idx < 0 || idx > 4)
1162                 return false;
1163
1164         switch (pkt_type) {
1165
1166         case SYN_NEWABS:
1167         case SYN_NEWABS_RELAXED:
1168                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1169
1170         case SYN_NEWABS_STRICT:
1171                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1172
1173         case SYN_OLDABS:
1174                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1175
1176         default:
1177                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1178                 return false;
1179         }
1180 }
1181
1182 static enum synaptics_pkt_type
1183 synaptics_detect_pkt_type(struct psmouse *psmouse)
1184 {
1185         int i;
1186
1187         for (i = 0; i < 5; i++) {
1188                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1189                         psmouse_info(psmouse, "using relaxed packet validation\n");
1190                         return SYN_NEWABS_RELAXED;
1191                 }
1192         }
1193
1194         return SYN_NEWABS_STRICT;
1195 }
1196
1197 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1198 {
1199         struct synaptics_data *priv = psmouse->private;
1200
1201         if (psmouse->pktcnt >= 6) { /* Full packet received */
1202                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1203                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1204
1205                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1206                     synaptics_is_pt_packet(psmouse->packet)) {
1207                         if (priv->pt_port)
1208                                 synaptics_pass_pt_packet(priv->pt_port,
1209                                                          psmouse->packet);
1210                 } else
1211                         synaptics_process_packet(psmouse);
1212
1213                 return PSMOUSE_FULL_PACKET;
1214         }
1215
1216         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1217                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1218 }
1219
1220 /*****************************************************************************
1221  *      Driver initialization/cleanup functions
1222  ****************************************************************************/
1223 static void set_abs_position_params(struct input_dev *dev,
1224                                     struct synaptics_device_info *info,
1225                                     int x_code, int y_code)
1226 {
1227         int x_min = info->x_min ?: XMIN_NOMINAL;
1228         int x_max = info->x_max ?: XMAX_NOMINAL;
1229         int y_min = info->y_min ?: YMIN_NOMINAL;
1230         int y_max = info->y_max ?: YMAX_NOMINAL;
1231         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1232                         SYN_REDUCED_FILTER_FUZZ : 0;
1233
1234         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1235         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1236         input_abs_set_res(dev, x_code, info->x_res);
1237         input_abs_set_res(dev, y_code, info->y_res);
1238 }
1239
1240 static int set_input_params(struct psmouse *psmouse,
1241                             struct synaptics_data *priv)
1242 {
1243         struct input_dev *dev = psmouse->dev;
1244         struct synaptics_device_info *info = &priv->info;
1245         int i;
1246         int error;
1247
1248         /* Reset default psmouse capabilities */
1249         __clear_bit(EV_REL, dev->evbit);
1250         bitmap_zero(dev->relbit, REL_CNT);
1251         bitmap_zero(dev->keybit, KEY_CNT);
1252
1253         /* Things that apply to both modes */
1254         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1255
1256         input_set_capability(dev, EV_KEY, BTN_LEFT);
1257
1258         /* Clickpads report only left button */
1259         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1260                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1261                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1262                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1263         }
1264
1265         if (!priv->absolute_mode) {
1266                 /* Relative mode */
1267                 input_set_capability(dev, EV_REL, REL_X);
1268                 input_set_capability(dev, EV_REL, REL_Y);
1269                 return 0;
1270         }
1271
1272         /* Absolute mode */
1273         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1274         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1275
1276         if (cr48_profile_sensor)
1277                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1278
1279         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1280                 set_abs_position_params(dev, info,
1281                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1282                 /* Image sensors can report per-contact pressure */
1283                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1284
1285                 error = input_mt_init_slots(dev, 2,
1286                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1287                 if (error)
1288                         return error;
1289
1290                 /* Image sensors can signal 4 and 5 finger clicks */
1291                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1292                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1293         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1294                 set_abs_position_params(dev, info,
1295                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1296                 /*
1297                  * Profile sensor in CR-48 tracks contacts reasonably well,
1298                  * other non-image sensors with AGM use semi-mt.
1299                  */
1300                 error = input_mt_init_slots(dev, 2,
1301                                             INPUT_MT_POINTER |
1302                                              (cr48_profile_sensor ?
1303                                               INPUT_MT_TRACK :
1304                                               INPUT_MT_SEMI_MT));
1305                 if (error)
1306                         return error;
1307
1308                 /*
1309                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1310                  * input_mt_report_pointer_emulation. But
1311                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1312                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1313                  * position. Let's re-initialize ABS_X/Y here.
1314                  */
1315                 if (!cr48_profile_sensor)
1316                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1317         }
1318
1319         if (SYN_CAP_PALMDETECT(info->capabilities))
1320                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1321
1322         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1323         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1324
1325         if (synaptics_has_multifinger(priv)) {
1326                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1327                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1328         }
1329
1330         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1331             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1332                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1333                 input_set_capability(dev, EV_KEY, BTN_BACK);
1334         }
1335
1336         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1337                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1338                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1339
1340         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1341                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1342                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1343                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1344                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1345         }
1346
1347         return 0;
1348 }
1349
1350 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1351                                               void *data, char *buf)
1352 {
1353         struct synaptics_data *priv = psmouse->private;
1354
1355         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1356 }
1357
1358 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1359                                              void *data, const char *buf,
1360                                              size_t len)
1361 {
1362         struct synaptics_data *priv = psmouse->private;
1363         unsigned int value;
1364         int err;
1365
1366         err = kstrtouint(buf, 10, &value);
1367         if (err)
1368                 return err;
1369
1370         if (value > 1)
1371                 return -EINVAL;
1372
1373         if (value == priv->disable_gesture)
1374                 return len;
1375
1376         priv->disable_gesture = value;
1377         if (value)
1378                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1379         else
1380                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1381
1382         if (synaptics_mode_cmd(psmouse, priv->mode))
1383                 return -EIO;
1384
1385         return len;
1386 }
1387
1388 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1389                     synaptics_show_disable_gesture,
1390                     synaptics_set_disable_gesture);
1391
1392 static void synaptics_disconnect(struct psmouse *psmouse)
1393 {
1394         struct synaptics_data *priv = psmouse->private;
1395
1396         /*
1397          * We might have left a breadcrumb when trying to
1398          * set up SMbus companion.
1399          */
1400         psmouse_smbus_cleanup(psmouse);
1401
1402         if (!priv->absolute_mode &&
1403                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1404                 device_remove_file(&psmouse->ps2dev.serio->dev,
1405                                    &psmouse_attr_disable_gesture.dattr);
1406
1407         synaptics_reset(psmouse);
1408         kfree(priv);
1409         psmouse->private = NULL;
1410 }
1411
1412 static int synaptics_reconnect(struct psmouse *psmouse)
1413 {
1414         struct synaptics_data *priv = psmouse->private;
1415         struct synaptics_device_info info;
1416         u8 param[2];
1417         int retry = 0;
1418         int error;
1419
1420         do {
1421                 psmouse_reset(psmouse);
1422                 if (retry) {
1423                         /*
1424                          * On some boxes, right after resuming, the touchpad
1425                          * needs some time to finish initializing (I assume
1426                          * it needs time to calibrate) and start responding
1427                          * to Synaptics-specific queries, so let's wait a
1428                          * bit.
1429                          */
1430                         ssleep(1);
1431                 }
1432                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1433                 error = synaptics_detect(psmouse, 0);
1434         } while (error && ++retry < 3);
1435
1436         if (error)
1437                 return error;
1438
1439         if (retry > 1)
1440                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1441
1442         error = synaptics_query_hardware(psmouse, &info);
1443         if (error) {
1444                 psmouse_err(psmouse, "Unable to query device.\n");
1445                 return error;
1446         }
1447
1448         error = synaptics_set_mode(psmouse);
1449         if (error) {
1450                 psmouse_err(psmouse, "Unable to initialize device.\n");
1451                 return error;
1452         }
1453
1454         if (info.identity != priv->info.identity ||
1455             info.model_id != priv->info.model_id ||
1456             info.capabilities != priv->info.capabilities ||
1457             info.ext_cap != priv->info.ext_cap) {
1458                 psmouse_err(psmouse,
1459                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1460                             priv->info.identity, info.identity,
1461                             priv->info.model_id, info.model_id,
1462                             priv->info.capabilities, info.capabilities,
1463                             priv->info.ext_cap, info.ext_cap);
1464                 return -ENXIO;
1465         }
1466
1467         return 0;
1468 }
1469
1470 static bool impaired_toshiba_kbc;
1471
1472 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1473 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1474         {
1475                 /* Toshiba Satellite */
1476                 .matches = {
1477                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1478                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1479                 },
1480         },
1481         {
1482                 /* Toshiba Dynabook */
1483                 .matches = {
1484                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1485                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1486                 },
1487         },
1488         {
1489                 /* Toshiba Portege M300 */
1490                 .matches = {
1491                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1492                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1493                 },
1494
1495         },
1496         {
1497                 /* Toshiba Portege M300 */
1498                 .matches = {
1499                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1500                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1501                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1502                 },
1503
1504         },
1505 #endif
1506         { }
1507 };
1508
1509 static bool broken_olpc_ec;
1510
1511 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1512 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1513         {
1514                 /* OLPC XO-1 or XO-1.5 */
1515                 .matches = {
1516                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1517                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1518                 },
1519         },
1520 #endif
1521         { }
1522 };
1523
1524 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1525 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1526         {
1527                 /* Cr-48 Chromebook (Codename Mario) */
1528                 .matches = {
1529                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1530                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1531                 },
1532         },
1533 #endif
1534         { }
1535 };
1536
1537 void __init synaptics_module_init(void)
1538 {
1539         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1540         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1541         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1542 }
1543
1544 static int synaptics_init_ps2(struct psmouse *psmouse,
1545                               struct synaptics_device_info *info,
1546                               bool absolute_mode)
1547 {
1548         struct synaptics_data *priv;
1549         int err;
1550
1551         synaptics_apply_quirks(psmouse, info);
1552
1553         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1554         if (!priv)
1555                 return -ENOMEM;
1556
1557         priv->info = *info;
1558         priv->absolute_mode = absolute_mode;
1559         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1560                 priv->disable_gesture = true;
1561
1562         /*
1563          * Unfortunately ForcePad capability is not exported over PS/2,
1564          * so we have to resort to checking PNP IDs.
1565          */
1566         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1567
1568         err = synaptics_set_mode(psmouse);
1569         if (err) {
1570                 psmouse_err(psmouse, "Unable to initialize device.\n");
1571                 goto init_fail;
1572         }
1573
1574         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1575                                         SYN_NEWABS : SYN_OLDABS;
1576
1577         psmouse_info(psmouse,
1578                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1579                      SYN_ID_MODEL(info->identity),
1580                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1581                      info->model_id,
1582                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1583                      info->ext_cap_10, info->board_id, info->firmware_id);
1584
1585         err = set_input_params(psmouse, priv);
1586         if (err) {
1587                 psmouse_err(psmouse,
1588                             "failed to set up capabilities: %d\n", err);
1589                 goto init_fail;
1590         }
1591
1592         /*
1593          * Encode touchpad model so that it can be used to set
1594          * input device->id.version and be visible to userspace.
1595          * Because version is __u16 we have to drop something.
1596          * Hardware info bits seem to be good candidates as they
1597          * are documented to be for Synaptics corp. internal use.
1598          */
1599         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1600                           (info->model_id & 0x000000ff);
1601
1602         if (absolute_mode) {
1603                 psmouse->protocol_handler = synaptics_process_byte;
1604                 psmouse->pktsize = 6;
1605         } else {
1606                 /* Relative mode follows standard PS/2 mouse protocol */
1607                 psmouse->protocol_handler = psmouse_process_byte;
1608                 psmouse->pktsize = 3;
1609         }
1610
1611         psmouse->set_rate = synaptics_set_rate;
1612         psmouse->disconnect = synaptics_disconnect;
1613         psmouse->reconnect = synaptics_reconnect;
1614         psmouse->cleanup = synaptics_reset;
1615         /* Synaptics can usually stay in sync without extra help */
1616         psmouse->resync_time = 0;
1617
1618         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1619                 synaptics_pt_create(psmouse);
1620
1621         /*
1622          * Toshiba's KBC seems to have trouble handling data from
1623          * Synaptics at full rate.  Switch to a lower rate (roughly
1624          * the same rate as a standard PS/2 mouse).
1625          */
1626         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1627                 psmouse_info(psmouse,
1628                              "Toshiba %s detected, limiting rate to 40pps.\n",
1629                              dmi_get_system_info(DMI_PRODUCT_NAME));
1630                 psmouse->rate = 40;
1631         }
1632
1633         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1634                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1635                                          &psmouse_attr_disable_gesture.dattr);
1636                 if (err) {
1637                         psmouse_err(psmouse,
1638                                     "Failed to create disable_gesture attribute (%d)",
1639                                     err);
1640                         goto init_fail;
1641                 }
1642         }
1643
1644         return 0;
1645
1646  init_fail:
1647         kfree(priv);
1648         return err;
1649 }
1650
1651 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1652 {
1653         struct synaptics_device_info info;
1654         int error;
1655
1656         psmouse_reset(psmouse);
1657
1658         error = synaptics_query_hardware(psmouse, &info);
1659         if (error) {
1660                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1661                 return error;
1662         }
1663
1664         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1665 }
1666
1667 int synaptics_init_absolute(struct psmouse *psmouse)
1668 {
1669         return __synaptics_init(psmouse, true);
1670 }
1671
1672 int synaptics_init_relative(struct psmouse *psmouse)
1673 {
1674         return __synaptics_init(psmouse, false);
1675 }
1676
1677 static int synaptics_setup_ps2(struct psmouse *psmouse,
1678                                struct synaptics_device_info *info)
1679 {
1680         bool absolute_mode = true;
1681         int error;
1682
1683         /*
1684          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1685          * packet spew overloads the EC such that key presses on the keyboard
1686          * are missed.  Given that, don't even attempt to use Absolute mode.
1687          * Relative mode seems to work just fine.
1688          */
1689         if (broken_olpc_ec) {
1690                 psmouse_info(psmouse,
1691                              "OLPC XO detected, forcing relative protocol.\n");
1692                 absolute_mode = false;
1693         }
1694
1695         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1696         if (error)
1697                 return error;
1698
1699         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1700 }
1701
1702 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1703
1704 void __init synaptics_module_init(void)
1705 {
1706 }
1707
1708 static int __maybe_unused
1709 synaptics_setup_ps2(struct psmouse *psmouse,
1710                     struct synaptics_device_info *info)
1711 {
1712         return -ENOSYS;
1713 }
1714
1715 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1716
1717 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1718
1719 /*
1720  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1721  * provides a better bandwidth and allow a better control of the touchpads.
1722  * This is used to decide if we need to use this bus or not.
1723  */
1724 enum {
1725         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1726         SYNAPTICS_INTERTOUCH_OFF,
1727         SYNAPTICS_INTERTOUCH_ON,
1728 };
1729
1730 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1731                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1732 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1733 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1734
1735 static int synaptics_create_intertouch(struct psmouse *psmouse,
1736                                        struct synaptics_device_info *info,
1737                                        bool leave_breadcrumbs)
1738 {
1739         bool topbuttonpad =
1740                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1741                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1742         const struct rmi_device_platform_data pdata = {
1743                 .sensor_pdata = {
1744                         .sensor_type = rmi_sensor_touchpad,
1745                         .axis_align.flip_y = true,
1746                         .kernel_tracking = false,
1747                         .topbuttonpad = topbuttonpad,
1748                 },
1749                 .f30_data = {
1750                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1751                         .trackstick_buttons =
1752                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1753                 },
1754         };
1755         const struct i2c_board_info intertouch_board = {
1756                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1757                 .flags = I2C_CLIENT_HOST_NOTIFY,
1758         };
1759
1760         return psmouse_smbus_init(psmouse, &intertouch_board,
1761                                   &pdata, sizeof(pdata), true,
1762                                   leave_breadcrumbs);
1763 }
1764
1765 /**
1766  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1767  * and decides to instantiate a SMBus InterTouch device.
1768  */
1769 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1770                                       struct synaptics_device_info *info,
1771                                       bool leave_breadcrumbs)
1772 {
1773         int error;
1774
1775         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1776                 return -ENXIO;
1777
1778         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1779                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1780                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1781
1782                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1783                                 psmouse_info(psmouse,
1784                                              "Your touchpad (%s) says it can support a different bus. "
1785                                              "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",
1786                                              psmouse->ps2dev.serio->firmware_id);
1787
1788                         return -ENXIO;
1789                 }
1790         }
1791
1792         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1793
1794         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1795         if (error) {
1796                 if (error == -EAGAIN)
1797                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1798                 else
1799                         psmouse_err(psmouse, "unable to create intertouch device\n");
1800
1801                 return error;
1802         }
1803
1804         return 0;
1805 }
1806
1807 int synaptics_init_smbus(struct psmouse *psmouse)
1808 {
1809         struct synaptics_device_info info;
1810         int error;
1811
1812         psmouse_reset(psmouse);
1813
1814         error = synaptics_query_hardware(psmouse, &info);
1815         if (error) {
1816                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1817                 return error;
1818         }
1819
1820         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1821                 return -ENXIO;
1822
1823         return synaptics_create_intertouch(psmouse, &info, false);
1824 }
1825
1826 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1827
1828 static int __maybe_unused
1829 synaptics_setup_intertouch(struct psmouse *psmouse,
1830                            struct synaptics_device_info *info,
1831                            bool leave_breadcrumbs)
1832 {
1833         return -ENOSYS;
1834 }
1835
1836 int synaptics_init_smbus(struct psmouse *psmouse)
1837 {
1838         return -ENOSYS;
1839 }
1840
1841 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1842
1843 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1844     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1845
1846 int synaptics_init(struct psmouse *psmouse)
1847 {
1848         struct synaptics_device_info info;
1849         int error;
1850         int retval;
1851
1852         psmouse_reset(psmouse);
1853
1854         error = synaptics_query_hardware(psmouse, &info);
1855         if (error) {
1856                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1857                 return error;
1858         }
1859
1860         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1861                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1862                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1863                     /* Forcepads need F21, which is not ready */
1864                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1865                         psmouse_warn(psmouse,
1866                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1867                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1868                 }
1869
1870                 error = synaptics_setup_intertouch(psmouse, &info, true);
1871                 if (!error)
1872                         return PSMOUSE_SYNAPTICS_SMBUS;
1873         }
1874
1875         retval = synaptics_setup_ps2(psmouse, &info);
1876         if (retval < 0) {
1877                 /*
1878                  * Not using any flavor of Synaptics support, so clean up
1879                  * SMbus breadcrumbs, if any.
1880                  */
1881                 psmouse_smbus_cleanup(psmouse);
1882         }
1883
1884         return retval;
1885 }
1886
1887 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1888
1889 int synaptics_init(struct psmouse *psmouse)
1890 {
1891         return -ENOSYS;
1892 }
1893
1894 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */