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         "LEN0071", /* T480 */
 174         "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */
 175         "LEN0073", /* X1 Carbon G5 (Elantech) */
 176         "LEN0091", /* X1 Carbon 6 */
 177         "LEN0092", /* X1 Carbon 6 */
 178         "LEN0093", /* T480 */
 179         "LEN0096", /* X280 */
 180         "LEN0097", /* X280 -> ALPS trackpoint */
 181         "LEN009b", /* T580 */
 182         "LEN200f", /* T450s */
 183         "LEN2044", /* L470  */
 184         "LEN2054", /* E480 */
 185         "LEN2055", /* E580 */
 186         "SYN3052", /* HP EliteBook 840 G4 */
 187         "SYN3221", /* HP 15-ay000 */
 188         "SYN323d", /* HP Spectre X360 13-w013dx */
 189         NULL
 190 };
 191
 192 static const char * const forcepad_pnp_ids[] = {
 193         "SYN300D",
 194         "SYN3014",
 195         NULL
 196 };
 197
 198 /*
 199  * Send a command to the synaptics touchpad by special commands
 200  */
 201 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param)
 202 {
 203         int error;
 204
 205         error = ps2_sliced_command(&psmouse->ps2dev, cmd);
 206         if (error)
 207                 return error;
 208
 209         error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO);
 210         if (error)
 211                 return error;
 212
 213         return 0;
 214 }
 215
 216 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val)
 217 {
 218         int error;
 219         union {
 220                 __be32 be_val;
 221                 char buf[4];
 222         } resp = { 0 };
 223
 224         error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1);
 225         if (error)
 226                 return error;
 227
 228         *val = be32_to_cpu(resp.be_val);
 229         return 0;
 230 }
 231
 232 /*
 233  * Identify Touchpad
 234  * See also the SYN_ID_* macros
 235  */
 236 static int synaptics_identify(struct psmouse *psmouse,
 237                               struct synaptics_device_info *info)
 238 {
 239         int error;
 240
 241         error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity);
 242         if (error)
 243                 return error;
 244
 245         return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO;
 246 }
 247
 248 /*
 249  * Read the model-id bytes from the touchpad
 250  * see also SYN_MODEL_* macros
 251  */
 252 static int synaptics_model_id(struct psmouse *psmouse,
 253                               struct synaptics_device_info *info)
 254 {
 255         return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id);
 256 }
 257
 258 /*
 259  * Read the firmware id from the touchpad
 260  */
 261 static int synaptics_firmware_id(struct psmouse *psmouse,
 262                                  struct synaptics_device_info *info)
 263 {
 264         return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID,
 265                                    &info->firmware_id);
 266 }
 267
 268 /*
 269  * Read the board id and the "More Extended Queries" from the touchpad
 270  * The board id is encoded in the "QUERY MODES" response
 271  */
 272 static int synaptics_query_modes(struct psmouse *psmouse,
 273                                  struct synaptics_device_info *info)
 274 {
 275         u8 bid[3];
 276         int error;
 277
 278         /* firmwares prior 7.5 have no board_id encoded */
 279         if (SYN_ID_FULL(info->identity) < 0x705)
 280                 return 0;
 281
 282         error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid);
 283         if (error)
 284                 return error;
 285
 286         info->board_id = ((bid[0] & 0xfc) << 6) | bid[1];
 287
 288         if (SYN_MEXT_CAP_BIT(bid[0]))
 289                 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10,
 290                                            &info->ext_cap_10);
 291
 292         return 0;
 293 }
 294
 295 /*
 296  * Read the capability-bits from the touchpad
 297  * see also the SYN_CAP_* macros
 298  */
 299 static int synaptics_capability(struct psmouse *psmouse,
 300                                 struct synaptics_device_info *info)
 301 {
 302         int error;
 303
 304         error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES,
 305                                     &info->capabilities);
 306         if (error)
 307                 return error;
 308
 309         info->ext_cap = info->ext_cap_0c = 0;
 310
 311         /*
 312          * Older firmwares had submodel ID fixed to 0x47
 313          */
 314         if (SYN_ID_FULL(info->identity) < 0x705 &&
 315             SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) {
 316                 return -ENXIO;
 317         }
 318
 319         /*
 320          * Unless capExtended is set the rest of the flags should be ignored
 321          */
 322         if (!SYN_CAP_EXTENDED(info->capabilities))
 323                 info->capabilities = 0;
 324
 325         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) {
 326                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB,
 327                                             &info->ext_cap);
 328                 if (error) {
 329                         psmouse_warn(psmouse,
 330                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 331                 } else {
 332                         /*
 333                          * if nExtBtn is greater than 8 it should be considered
 334                          * invalid and treated as 0
 335                          */
 336                         if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8)
 337                                 info->ext_cap &= ~SYN_CAP_MB_MASK;
 338                 }
 339         }
 340
 341         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) {
 342                 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C,
 343                                             &info->ext_cap_0c);
 344                 if (error)
 345                         psmouse_warn(psmouse,
 346                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 347         }
 348
 349         return 0;
 350 }
 351
 352 /*
 353  * Read touchpad resolution and maximum reported coordinates
 354  * Resolution is left zero if touchpad does not support the query
 355  */
 356 static int synaptics_resolution(struct psmouse *psmouse,
 357                                 struct synaptics_device_info *info)
 358 {
 359         u8 resp[3];
 360         int error;
 361
 362         if (SYN_ID_MAJOR(info->identity) < 4)
 363                 return 0;
 364
 365         error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp);
 366         if (!error) {
 367                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 368                         info->x_res = resp[0]; /* x resolution in units/mm */
 369                         info->y_res = resp[2]; /* y resolution in units/mm */
 370                 }
 371         }
 372
 373         if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 &&
 374             SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) {
 375                 error = synaptics_send_cmd(psmouse,
 376                                            SYN_QUE_EXT_MAX_COORDS, resp);
 377                 if (error) {
 378                         psmouse_warn(psmouse,
 379                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 380                 } else {
 381                         info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 382                         info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 383                         psmouse_info(psmouse,
 384                                      "queried max coordinates: x [..%d], y [..%d]\n",
 385                                      info->x_max, info->y_max);
 386                 }
 387         }
 388
 389         if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) &&
 390             (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 ||
 391              /*
 392               * Firmware v8.1 does not report proper number of extended
 393               * capabilities, but has been proven to report correct min
 394               * coordinates.
 395               */
 396              SYN_ID_FULL(info->identity) == 0x801)) {
 397                 error = synaptics_send_cmd(psmouse,
 398                                            SYN_QUE_EXT_MIN_COORDS, resp);
 399                 if (error) {
 400                         psmouse_warn(psmouse,
 401                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 402                 } else {
 403                         info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 404                         info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 405                         psmouse_info(psmouse,
 406                                      "queried min coordinates: x [%d..], y [%d..]\n",
 407                                      info->x_min, info->y_min);
 408                 }
 409         }
 410
 411         return 0;
 412 }
 413
 414 static int synaptics_query_hardware(struct psmouse *psmouse,
 415                                     struct synaptics_device_info *info)
 416 {
 417         int error;
 418
 419         memset(info, 0, sizeof(*info));
 420
 421         error = synaptics_identify(psmouse, info);
 422         if (error)
 423                 return error;
 424
 425         error = synaptics_model_id(psmouse, info);
 426         if (error)
 427                 return error;
 428
 429         error = synaptics_firmware_id(psmouse, info);
 430         if (error)
 431                 return error;
 432
 433         error = synaptics_query_modes(psmouse, info);
 434         if (error)
 435                 return error;
 436
 437         error = synaptics_capability(psmouse, info);
 438         if (error)
 439                 return error;
 440
 441         error = synaptics_resolution(psmouse, info);
 442         if (error)
 443                 return error;
 444
 445         return 0;
 446 }
 447
 448 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
 449
 450 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 451
 452 static bool cr48_profile_sensor;
 453
 454 #define ANY_BOARD_ID 0
 455 struct min_max_quirk {
 456         const char * const *pnp_ids;
 457         struct {
 458                 u32 min, max;
 459         } board_id;
 460         u32 x_min, x_max, y_min, y_max;
 461 };
 462
 463 static const struct min_max_quirk min_max_pnpid_table[] = {
 464         {
 465                 (const char * const []){"LEN0033", NULL},
 466                 {ANY_BOARD_ID, ANY_BOARD_ID},
 467                 1024, 5052, 2258, 4832
 468         },
 469         {
 470                 (const char * const []){"LEN0042", NULL},
 471                 {ANY_BOARD_ID, ANY_BOARD_ID},
 472                 1232, 5710, 1156, 4696
 473         },
 474         {
 475                 (const char * const []){"LEN0034", "LEN0036", "LEN0037",
 476                                         "LEN0039", "LEN2002", "LEN2004",
 477                                         NULL},
 478                 {ANY_BOARD_ID, 2961},
 479                 1024, 5112, 2024, 4832
 480         },
 481         {
 482                 (const char * const []){"LEN2000", NULL},
 483                 {ANY_BOARD_ID, ANY_BOARD_ID},
 484                 1024, 5113, 2021, 4832
 485         },
 486         {
 487                 (const char * const []){"LEN2001", NULL},
 488                 {ANY_BOARD_ID, ANY_BOARD_ID},
 489                 1024, 5022, 2508, 4832
 490         },
 491         {
 492                 (const char * const []){"LEN2006", NULL},
 493                 {2691, 2691},
 494                 1024, 5045, 2457, 4832
 495         },
 496         {
 497                 (const char * const []){"LEN2006", NULL},
 498                 {ANY_BOARD_ID, ANY_BOARD_ID},
 499                 1264, 5675, 1171, 4688
 500         },
 501         { }
 502 };
 503
 504 /*****************************************************************************
 505  *      Synaptics communications functions
 506  ****************************************************************************/
 507
 508 /*
 509  * Synaptics touchpads report the y coordinate from bottom to top, which is
 510  * opposite from what userspace expects.
 511  * This function is used to invert y before reporting.
 512  */
 513 static int synaptics_invert_y(int y)
 514 {
 515         return YMAX_NOMINAL + YMIN_NOMINAL - y;
 516 }
 517
 518 /*
 519  * Apply quirk(s) if the hardware matches
 520  */
 521 static void synaptics_apply_quirks(struct psmouse *psmouse,
 522                                    struct synaptics_device_info *info)
 523 {
 524         int i;
 525
 526         for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
 527                 if (!psmouse_matches_pnp_id(psmouse,
 528                                             min_max_pnpid_table[i].pnp_ids))
 529                         continue;
 530
 531                 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
 532                     info->board_id < min_max_pnpid_table[i].board_id.min)
 533                         continue;
 534
 535                 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
 536                     info->board_id > min_max_pnpid_table[i].board_id.max)
 537                         continue;
 538
 539                 info->x_min = min_max_pnpid_table[i].x_min;
 540                 info->x_max = min_max_pnpid_table[i].x_max;
 541                 info->y_min = min_max_pnpid_table[i].y_min;
 542                 info->y_max = min_max_pnpid_table[i].y_max;
 543                 psmouse_info(psmouse,
 544                              "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",
 545                              info->x_min, info->x_max,
 546                              info->y_min, info->y_max);
 547                 break;
 548         }
 549 }
 550
 551 static bool synaptics_has_agm(struct synaptics_data *priv)
 552 {
 553         return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) ||
 554                 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c));
 555 }
 556
 557 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 558 {
 559         static u8 param = 0xc8;
 560         int error;
 561
 562         error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL);
 563         if (error)
 564                 return error;
 565
 566         error = ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE);
 567         if (error)
 568                 return error;
 569
 570         return 0;
 571 }
 572
 573 static int synaptics_set_mode(struct psmouse *psmouse)
 574 {
 575         struct synaptics_data *priv = psmouse->private;
 576         int error;
 577
 578         priv->mode = 0;
 579         if (priv->absolute_mode)
 580                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 581         if (priv->disable_gesture)
 582                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 583         if (psmouse->rate >= 80)
 584                 priv->mode |= SYN_BIT_HIGH_RATE;
 585         if (SYN_CAP_EXTENDED(priv->info.capabilities))
 586                 priv->mode |= SYN_BIT_W_MODE;
 587
 588         error = synaptics_mode_cmd(psmouse, priv->mode);
 589         if (error)
 590                 return error;
 591
 592         if (priv->absolute_mode && synaptics_has_agm(priv)) {
 593                 error = synaptics_set_advanced_gesture_mode(psmouse);
 594                 if (error) {
 595                         psmouse_err(psmouse,
 596                                     "Advanced gesture mode init failed: %d\n",
 597                                     error);
 598                         return error;
 599                 }
 600         }
 601
 602         return 0;
 603 }
 604
 605 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 606 {
 607         struct synaptics_data *priv = psmouse->private;
 608
 609         if (rate >= 80) {
 610                 priv->mode |= SYN_BIT_HIGH_RATE;
 611                 psmouse->rate = 80;
 612         } else {
 613                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 614                 psmouse->rate = 40;
 615         }
 616
 617         synaptics_mode_cmd(psmouse, priv->mode);
 618 }
 619
 620 /*****************************************************************************
 621  *      Synaptics pass-through PS/2 port support
 622  ****************************************************************************/
 623 static int synaptics_pt_write(struct serio *serio, u8 c)
 624 {
 625         struct psmouse *parent = serio_get_drvdata(serio->parent);
 626         u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 627         int error;
 628
 629         error = ps2_sliced_command(&parent->ps2dev, c);
 630         if (error)
 631                 return error;
 632
 633         error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE);
 634         if (error)
 635                 return error;
 636
 637         return 0;
 638 }
 639
 640 static int synaptics_pt_start(struct serio *serio)
 641 {
 642         struct psmouse *parent = serio_get_drvdata(serio->parent);
 643         struct synaptics_data *priv = parent->private;
 644
 645         serio_pause_rx(parent->ps2dev.serio);
 646         priv->pt_port = serio;
 647         serio_continue_rx(parent->ps2dev.serio);
 648
 649         return 0;
 650 }
 651
 652 static void synaptics_pt_stop(struct serio *serio)
 653 {
 654         struct psmouse *parent = serio_get_drvdata(serio->parent);
 655         struct synaptics_data *priv = parent->private;
 656
 657         serio_pause_rx(parent->ps2dev.serio);
 658         priv->pt_port = NULL;
 659         serio_continue_rx(parent->ps2dev.serio);
 660 }
 661
 662 static int synaptics_is_pt_packet(u8 *buf)
 663 {
 664         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 665 }
 666
 667 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet)
 668 {
 669         struct psmouse *child = serio_get_drvdata(ptport);
 670
 671         if (child && child->state == PSMOUSE_ACTIVATED) {
 672                 serio_interrupt(ptport, packet[1], 0);
 673                 serio_interrupt(ptport, packet[4], 0);
 674                 serio_interrupt(ptport, packet[5], 0);
 675                 if (child->pktsize == 4)
 676                         serio_interrupt(ptport, packet[2], 0);
 677         } else {
 678                 serio_interrupt(ptport, packet[1], 0);
 679         }
 680 }
 681
 682 static void synaptics_pt_activate(struct psmouse *psmouse)
 683 {
 684         struct synaptics_data *priv = psmouse->private;
 685         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 686
 687         /* adjust the touchpad to child's choice of protocol */
 688         if (child) {
 689                 if (child->pktsize == 4)
 690                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 691                 else
 692                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 693
 694                 if (synaptics_mode_cmd(psmouse, priv->mode))
 695                         psmouse_warn(psmouse,
 696                                      "failed to switch guest protocol\n");
 697         }
 698 }
 699
 700 static void synaptics_pt_create(struct psmouse *psmouse)
 701 {
 702         struct serio *serio;
 703
 704         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 705         if (!serio) {
 706                 psmouse_err(psmouse,
 707                             "not enough memory for pass-through port\n");
 708                 return;
 709         }
 710
 711         serio->id.type = SERIO_PS_PSTHRU;
 712         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 713         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys));
 714         serio->write = synaptics_pt_write;
 715         serio->start = synaptics_pt_start;
 716         serio->stop = synaptics_pt_stop;
 717         serio->parent = psmouse->ps2dev.serio;
 718
 719         psmouse->pt_activate = synaptics_pt_activate;
 720
 721         psmouse_info(psmouse, "serio: %s port at %s\n",
 722                      serio->name, psmouse->phys);
 723         serio_register_port(serio);
 724 }
 725
 726 /*****************************************************************************
 727  *      Functions to interpret the absolute mode packets
 728  ****************************************************************************/
 729
 730 static void synaptics_parse_agm(const u8 buf[],
 731                                 struct synaptics_data *priv,
 732                                 struct synaptics_hw_state *hw)
 733 {
 734         struct synaptics_hw_state *agm = &priv->agm;
 735         int agm_packet_type;
 736
 737         agm_packet_type = (buf[5] & 0x30) >> 4;
 738         switch (agm_packet_type) {
 739         case 1:
 740                 /* Gesture packet: (x, y, z) half resolution */
 741                 agm->w = hw->w;
 742                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 743                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 744                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 745                 break;
 746
 747         case 2:
 748                 /* AGM-CONTACT packet: we are only interested in the count */
 749                 priv->agm_count = buf[1];
 750                 break;
 751
 752         default:
 753                 break;
 754         }
 755 }
 756
 757 static void synaptics_parse_ext_buttons(const u8 buf[],
 758                                         struct synaptics_data *priv,
 759                                         struct synaptics_hw_state *hw)
 760 {
 761         unsigned int ext_bits =
 762                 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 763         unsigned int ext_mask = GENMASK(ext_bits - 1, 0);
 764
 765         hw->ext_buttons = buf[4] & ext_mask;
 766         hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits;
 767 }
 768
 769 static int synaptics_parse_hw_state(const u8 buf[],
 770                                     struct synaptics_data *priv,
 771                                     struct synaptics_hw_state *hw)
 772 {
 773         memset(hw, 0, sizeof(struct synaptics_hw_state));
 774
 775         if (SYN_MODEL_NEWABS(priv->info.model_id)) {
 776                 hw->w = (((buf[0] & 0x30) >> 2) |
 777                          ((buf[0] & 0x04) >> 1) |
 778                          ((buf[3] & 0x04) >> 2));
 779
 780                 if (synaptics_has_agm(priv) && hw->w == 2) {
 781                         synaptics_parse_agm(buf, priv, hw);
 782                         return 1;
 783                 }
 784
 785                 hw->x = (((buf[3] & 0x10) << 8) |
 786                          ((buf[1] & 0x0f) << 8) |
 787                          buf[4]);
 788                 hw->y = (((buf[3] & 0x20) << 7) |
 789                          ((buf[1] & 0xf0) << 4) |
 790                          buf[5]);
 791                 hw->z = buf[2];
 792
 793                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 794                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 795
 796                 if (priv->is_forcepad) {
 797                         /*
 798                          * ForcePads, like Clickpads, use middle button
 799                          * bits to report primary button clicks.
 800                          * Unfortunately they report primary button not
 801                          * only when user presses on the pad above certain
 802                          * threshold, but also when there are more than one
 803                          * finger on the touchpad, which interferes with
 804                          * out multi-finger gestures.
 805                          */
 806                         if (hw->z == 0) {
 807                                 /* No contacts */
 808                                 priv->press = priv->report_press = false;
 809                         } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) {
 810                                 /*
 811                                  * Single-finger touch with pressure above
 812                                  * the threshold. If pressure stays long
 813                                  * enough, we'll start reporting primary
 814                                  * button. We rely on the device continuing
 815                                  * sending data even if finger does not
 816                                  * move.
 817                                  */
 818                                 if  (!priv->press) {
 819                                         priv->press_start = jiffies;
 820                                         priv->press = true;
 821                                 } else if (time_after(jiffies,
 822                                                 priv->press_start +
 823                                                         msecs_to_jiffies(50))) {
 824                                         priv->report_press = true;
 825                                 }
 826                         } else {
 827                                 priv->press = false;
 828                         }
 829
 830                         hw->left = priv->report_press;
 831
 832                 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) {
 833                         /*
 834                          * Clickpad's button is transmitted as middle button,
 835                          * however, since it is primary button, we will report
 836                          * it as BTN_LEFT.
 837                          */
 838                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 839
 840                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) {
 841                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 842                         if (hw->w == 2)
 843                                 hw->scroll = (s8)buf[1];
 844                 }
 845
 846                 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 847                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 848                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 849                 }
 850
 851                 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 &&
 852                     ((buf[0] ^ buf[3]) & 0x02)) {
 853                         synaptics_parse_ext_buttons(buf, priv, hw);
 854                 }
 855         } else {
 856                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 857                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 858
 859                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 860                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 861
 862                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 863                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 864         }
 865
 866         /*
 867          * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE
 868          * is used by some firmware to indicate a finger at the edge of
 869          * the touchpad whose precise position cannot be determined, so
 870          * convert these values to the maximum axis value.
 871          */
 872         if (hw->x > X_MAX_POSITIVE)
 873                 hw->x -= 1 << ABS_POS_BITS;
 874         else if (hw->x == X_MAX_POSITIVE)
 875                 hw->x = XMAX;
 876
 877         if (hw->y > Y_MAX_POSITIVE)
 878                 hw->y -= 1 << ABS_POS_BITS;
 879         else if (hw->y == Y_MAX_POSITIVE)
 880                 hw->y = YMAX;
 881
 882         return 0;
 883 }
 884
 885 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 886                                           bool active, int x, int y)
 887 {
 888         input_mt_slot(dev, slot);
 889         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 890         if (active) {
 891                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 892                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 893         }
 894 }
 895
 896 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 897                                           const struct synaptics_hw_state *a,
 898                                           const struct synaptics_hw_state *b,
 899                                           int num_fingers)
 900 {
 901         if (num_fingers >= 2) {
 902                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 903                                               min(a->y, b->y));
 904                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 905                                               max(a->y, b->y));
 906         } else if (num_fingers == 1) {
 907                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 908                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 909         } else {
 910                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 911                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 912         }
 913 }
 914
 915 static void synaptics_report_ext_buttons(struct psmouse *psmouse,
 916                                          const struct synaptics_hw_state *hw)
 917 {
 918         struct input_dev *dev = psmouse->dev;
 919         struct synaptics_data *priv = psmouse->private;
 920         int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1;
 921         int i;
 922
 923         if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap))
 924                 return;
 925
 926         /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */
 927         if ((SYN_ID_FULL(priv->info.identity) == 0x801 ||
 928              SYN_ID_FULL(priv->info.identity) == 0x802) &&
 929             !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02))
 930                 return;
 931
 932         if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) {
 933                 for (i = 0; i < ext_bits; i++) {
 934                         input_report_key(dev, BTN_0 + 2 * i,
 935                                 hw->ext_buttons & BIT(i));
 936                         input_report_key(dev, BTN_1 + 2 * i,
 937                                 hw->ext_buttons & BIT(i + ext_bits));
 938                 }
 939                 return;
 940         }
 941
 942         /*
 943          * This generation of touchpads has the trackstick buttons
 944          * physically wired to the touchpad. Re-route them through
 945          * the pass-through interface.
 946          */
 947         if (priv->pt_port) {
 948                 u8 pt_buttons;
 949
 950                 /* The trackstick expects at most 3 buttons */
 951                 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons)      |
 952                              SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 |
 953                              SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2;
 954
 955                 serio_interrupt(priv->pt_port,
 956                                 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA);
 957                 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA);
 958         }
 959 }
 960
 961 static void synaptics_report_buttons(struct psmouse *psmouse,
 962                                      const struct synaptics_hw_state *hw)
 963 {
 964         struct input_dev *dev = psmouse->dev;
 965         struct synaptics_data *priv = psmouse->private;
 966
 967         input_report_key(dev, BTN_LEFT, hw->left);
 968         input_report_key(dev, BTN_RIGHT, hw->right);
 969
 970         if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities))
 971                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 972
 973         if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) {
 974                 input_report_key(dev, BTN_FORWARD, hw->up);
 975                 input_report_key(dev, BTN_BACK, hw->down);
 976         }
 977
 978         synaptics_report_ext_buttons(psmouse, hw);
 979 }
 980
 981 static void synaptics_report_mt_data(struct psmouse *psmouse,
 982                                      const struct synaptics_hw_state *sgm,
 983                                      int num_fingers)
 984 {
 985         struct input_dev *dev = psmouse->dev;
 986         struct synaptics_data *priv = psmouse->private;
 987         const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm };
 988         struct input_mt_pos pos[2];
 989         int slot[2], nsemi, i;
 990
 991         nsemi = clamp_val(num_fingers, 0, 2);
 992
 993         for (i = 0; i < nsemi; i++) {
 994                 pos[i].x = hw[i]->x;
 995                 pos[i].y = synaptics_invert_y(hw[i]->y);
 996         }
 997
 998         input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res);
 999
1000         for (i = 0; i < nsemi; i++) {
1001                 input_mt_slot(dev, slot[i]);
1002                 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
1003                 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x);
1004                 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y);
1005                 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z);
1006         }
1007
1008         input_mt_drop_unused(dev);
1009
1010         /* Don't use active slot count to generate BTN_TOOL events. */
1011         input_mt_report_pointer_emulation(dev, false);
1012
1013         /* Send the number of fingers reported by touchpad itself. */
1014         input_mt_report_finger_count(dev, num_fingers);
1015
1016         synaptics_report_buttons(psmouse, sgm);
1017
1018         input_sync(dev);
1019 }
1020
1021 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1022                                            struct synaptics_hw_state *sgm)
1023 {
1024         struct synaptics_data *priv = psmouse->private;
1025         int num_fingers;
1026
1027         /*
1028          * Update mt_state using the new finger count and current mt_state.
1029          */
1030         if (sgm->z == 0)
1031                 num_fingers = 0;
1032         else if (sgm->w >= 4)
1033                 num_fingers = 1;
1034         else if (sgm->w == 0)
1035                 num_fingers = 2;
1036         else if (sgm->w == 1)
1037                 num_fingers = priv->agm_count ? priv->agm_count : 3;
1038         else
1039                 num_fingers = 4;
1040
1041         /* Send resulting input events to user space */
1042         synaptics_report_mt_data(psmouse, sgm, num_fingers);
1043 }
1044
1045 static bool synaptics_has_multifinger(struct synaptics_data *priv)
1046 {
1047         if (SYN_CAP_MULTIFINGER(priv->info.capabilities))
1048                 return true;
1049
1050         /* Advanced gesture mode also sends multi finger data */
1051         return synaptics_has_agm(priv);
1052 }
1053
1054 /*
1055  *  called for each full received packet from the touchpad
1056  */
1057 static void synaptics_process_packet(struct psmouse *psmouse)
1058 {
1059         struct input_dev *dev = psmouse->dev;
1060         struct synaptics_data *priv = psmouse->private;
1061         struct synaptics_device_info *info = &priv->info;
1062         struct synaptics_hw_state hw;
1063         int num_fingers;
1064         int finger_width;
1065
1066         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1067                 return;
1068
1069         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1070                 synaptics_image_sensor_process(psmouse, &hw);
1071                 return;
1072         }
1073
1074         if (hw.scroll) {
1075                 priv->scroll += hw.scroll;
1076
1077                 while (priv->scroll >= 4) {
1078                         input_report_key(dev, BTN_BACK, !hw.down);
1079                         input_sync(dev);
1080                         input_report_key(dev, BTN_BACK, hw.down);
1081                         input_sync(dev);
1082                         priv->scroll -= 4;
1083                 }
1084                 while (priv->scroll <= -4) {
1085                         input_report_key(dev, BTN_FORWARD, !hw.up);
1086                         input_sync(dev);
1087                         input_report_key(dev, BTN_FORWARD, hw.up);
1088                         input_sync(dev);
1089                         priv->scroll += 4;
1090                 }
1091                 return;
1092         }
1093
1094         if (hw.z > 0 && hw.x > 1) {
1095                 num_fingers = 1;
1096                 finger_width = 5;
1097                 if (SYN_CAP_EXTENDED(info->capabilities)) {
1098                         switch (hw.w) {
1099                         case 0 ... 1:
1100                                 if (synaptics_has_multifinger(priv))
1101                                         num_fingers = hw.w + 2;
1102                                 break;
1103                         case 2:
1104                                 if (SYN_MODEL_PEN(info->model_id))
1105                                         ;   /* Nothing, treat a pen as a single finger */
1106                                 break;
1107                         case 4 ... 15:
1108                                 if (SYN_CAP_PALMDETECT(info->capabilities))
1109                                         finger_width = hw.w;
1110                                 break;
1111                         }
1112                 }
1113         } else {
1114                 num_fingers = 0;
1115                 finger_width = 0;
1116         }
1117
1118         if (cr48_profile_sensor) {
1119                 synaptics_report_mt_data(psmouse, &hw, num_fingers);
1120                 return;
1121         }
1122
1123         if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c))
1124                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1125                                               num_fingers);
1126
1127         /* Post events
1128          * BTN_TOUCH has to be first as mousedev relies on it when doing
1129          * absolute -> relative conversion
1130          */
1131         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1132         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1133
1134         if (num_fingers > 0) {
1135                 input_report_abs(dev, ABS_X, hw.x);
1136                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1137         }
1138         input_report_abs(dev, ABS_PRESSURE, hw.z);
1139
1140         if (SYN_CAP_PALMDETECT(info->capabilities))
1141                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1142
1143         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1144         if (synaptics_has_multifinger(priv)) {
1145                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1146                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1147         }
1148
1149         synaptics_report_buttons(psmouse, &hw);
1150
1151         input_sync(dev);
1152 }
1153
1154 static bool synaptics_validate_byte(struct psmouse *psmouse,
1155                                     int idx, enum synaptics_pkt_type pkt_type)
1156 {
1157         static const u8 newabs_mask[]     = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1158         static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1159         static const u8 newabs_rslt[]     = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1160         static const u8 oldabs_mask[]     = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1161         static const u8 oldabs_rslt[]     = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1162         const u8 *packet = psmouse->packet;
1163
1164         if (idx < 0 || idx > 4)
1165                 return false;
1166
1167         switch (pkt_type) {
1168
1169         case SYN_NEWABS:
1170         case SYN_NEWABS_RELAXED:
1171                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1172
1173         case SYN_NEWABS_STRICT:
1174                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1175
1176         case SYN_OLDABS:
1177                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1178
1179         default:
1180                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1181                 return false;
1182         }
1183 }
1184
1185 static enum synaptics_pkt_type
1186 synaptics_detect_pkt_type(struct psmouse *psmouse)
1187 {
1188         int i;
1189
1190         for (i = 0; i < 5; i++) {
1191                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1192                         psmouse_info(psmouse, "using relaxed packet validation\n");
1193                         return SYN_NEWABS_RELAXED;
1194                 }
1195         }
1196
1197         return SYN_NEWABS_STRICT;
1198 }
1199
1200 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1201 {
1202         struct synaptics_data *priv = psmouse->private;
1203
1204         if (psmouse->pktcnt >= 6) { /* Full packet received */
1205                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1206                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1207
1208                 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) &&
1209                     synaptics_is_pt_packet(psmouse->packet)) {
1210                         if (priv->pt_port)
1211                                 synaptics_pass_pt_packet(priv->pt_port,
1212                                                          psmouse->packet);
1213                 } else
1214                         synaptics_process_packet(psmouse);
1215
1216                 return PSMOUSE_FULL_PACKET;
1217         }
1218
1219         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1220                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1221 }
1222
1223 /*****************************************************************************
1224  *      Driver initialization/cleanup functions
1225  ****************************************************************************/
1226 static void set_abs_position_params(struct input_dev *dev,
1227                                     struct synaptics_device_info *info,
1228                                     int x_code, int y_code)
1229 {
1230         int x_min = info->x_min ?: XMIN_NOMINAL;
1231         int x_max = info->x_max ?: XMAX_NOMINAL;
1232         int y_min = info->y_min ?: YMIN_NOMINAL;
1233         int y_max = info->y_max ?: YMAX_NOMINAL;
1234         int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ?
1235                         SYN_REDUCED_FILTER_FUZZ : 0;
1236
1237         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1238         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1239         input_abs_set_res(dev, x_code, info->x_res);
1240         input_abs_set_res(dev, y_code, info->y_res);
1241 }
1242
1243 static int set_input_params(struct psmouse *psmouse,
1244                             struct synaptics_data *priv)
1245 {
1246         struct input_dev *dev = psmouse->dev;
1247         struct synaptics_device_info *info = &priv->info;
1248         int i;
1249         int error;
1250
1251         /* Reset default psmouse capabilities */
1252         __clear_bit(EV_REL, dev->evbit);
1253         bitmap_zero(dev->relbit, REL_CNT);
1254         bitmap_zero(dev->keybit, KEY_CNT);
1255
1256         /* Things that apply to both modes */
1257         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1258
1259         input_set_capability(dev, EV_KEY, BTN_LEFT);
1260
1261         /* Clickpads report only left button */
1262         if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1263                 input_set_capability(dev, EV_KEY, BTN_RIGHT);
1264                 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities))
1265                         input_set_capability(dev, EV_KEY, BTN_MIDDLE);
1266         }
1267
1268         if (!priv->absolute_mode) {
1269                 /* Relative mode */
1270                 input_set_capability(dev, EV_REL, REL_X);
1271                 input_set_capability(dev, EV_REL, REL_Y);
1272                 return 0;
1273         }
1274
1275         /* Absolute mode */
1276         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1277         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1278
1279         if (cr48_profile_sensor)
1280                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1281
1282         if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) {
1283                 set_abs_position_params(dev, info,
1284                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1285                 /* Image sensors can report per-contact pressure */
1286                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1287
1288                 error = input_mt_init_slots(dev, 2,
1289                                             INPUT_MT_POINTER | INPUT_MT_TRACK);
1290                 if (error)
1291                         return error;
1292
1293                 /* Image sensors can signal 4 and 5 finger clicks */
1294                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP);
1295                 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP);
1296         } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) {
1297                 set_abs_position_params(dev, info,
1298                                         ABS_MT_POSITION_X, ABS_MT_POSITION_Y);
1299                 /*
1300                  * Profile sensor in CR-48 tracks contacts reasonably well,
1301                  * other non-image sensors with AGM use semi-mt.
1302                  */
1303                 error = input_mt_init_slots(dev, 2,
1304                                             INPUT_MT_POINTER |
1305                                              (cr48_profile_sensor ?
1306                                               INPUT_MT_TRACK :
1307                                               INPUT_MT_SEMI_MT));
1308                 if (error)
1309                         return error;
1310
1311                 /*
1312                  * For semi-mt devices we send ABS_X/Y ourselves instead of
1313                  * input_mt_report_pointer_emulation. But
1314                  * input_mt_init_slots() resets the fuzz to 0, leading to a
1315                  * filtered ABS_MT_POSITION_X but an unfiltered ABS_X
1316                  * position. Let's re-initialize ABS_X/Y here.
1317                  */
1318                 if (!cr48_profile_sensor)
1319                         set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y);
1320         }
1321
1322         if (SYN_CAP_PALMDETECT(info->capabilities))
1323                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1324
1325         input_set_capability(dev, EV_KEY, BTN_TOUCH);
1326         input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER);
1327
1328         if (synaptics_has_multifinger(priv)) {
1329                 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP);
1330                 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP);
1331         }
1332
1333         if (SYN_CAP_FOUR_BUTTON(info->capabilities) ||
1334             SYN_CAP_MIDDLE_BUTTON(info->capabilities)) {
1335                 input_set_capability(dev, EV_KEY, BTN_FORWARD);
1336                 input_set_capability(dev, EV_KEY, BTN_BACK);
1337         }
1338
1339         if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1340                 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++)
1341                         input_set_capability(dev, EV_KEY, BTN_0 + i);
1342
1343         if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) {
1344                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1345                 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1346                     !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10))
1347                         __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit);
1348         }
1349
1350         return 0;
1351 }
1352
1353 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1354                                               void *data, char *buf)
1355 {
1356         struct synaptics_data *priv = psmouse->private;
1357
1358         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1359 }
1360
1361 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1362                                              void *data, const char *buf,
1363                                              size_t len)
1364 {
1365         struct synaptics_data *priv = psmouse->private;
1366         unsigned int value;
1367         int err;
1368
1369         err = kstrtouint(buf, 10, &value);
1370         if (err)
1371                 return err;
1372
1373         if (value > 1)
1374                 return -EINVAL;
1375
1376         if (value == priv->disable_gesture)
1377                 return len;
1378
1379         priv->disable_gesture = value;
1380         if (value)
1381                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1382         else
1383                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1384
1385         if (synaptics_mode_cmd(psmouse, priv->mode))
1386                 return -EIO;
1387
1388         return len;
1389 }
1390
1391 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1392                     synaptics_show_disable_gesture,
1393                     synaptics_set_disable_gesture);
1394
1395 static void synaptics_disconnect(struct psmouse *psmouse)
1396 {
1397         struct synaptics_data *priv = psmouse->private;
1398
1399         /*
1400          * We might have left a breadcrumb when trying to
1401          * set up SMbus companion.
1402          */
1403         psmouse_smbus_cleanup(psmouse);
1404
1405         if (!priv->absolute_mode &&
1406                         SYN_ID_DISGEST_SUPPORTED(priv->info.identity))
1407                 device_remove_file(&psmouse->ps2dev.serio->dev,
1408                                    &psmouse_attr_disable_gesture.dattr);
1409
1410         synaptics_reset(psmouse);
1411         kfree(priv);
1412         psmouse->private = NULL;
1413 }
1414
1415 static int synaptics_reconnect(struct psmouse *psmouse)
1416 {
1417         struct synaptics_data *priv = psmouse->private;
1418         struct synaptics_device_info info;
1419         u8 param[2];
1420         int retry = 0;
1421         int error;
1422
1423         do {
1424                 psmouse_reset(psmouse);
1425                 if (retry) {
1426                         /*
1427                          * On some boxes, right after resuming, the touchpad
1428                          * needs some time to finish initializing (I assume
1429                          * it needs time to calibrate) and start responding
1430                          * to Synaptics-specific queries, so let's wait a
1431                          * bit.
1432                          */
1433                         ssleep(1);
1434                 }
1435                 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID);
1436                 error = synaptics_detect(psmouse, 0);
1437         } while (error && ++retry < 3);
1438
1439         if (error)
1440                 return error;
1441
1442         if (retry > 1)
1443                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1444
1445         error = synaptics_query_hardware(psmouse, &info);
1446         if (error) {
1447                 psmouse_err(psmouse, "Unable to query device.\n");
1448                 return error;
1449         }
1450
1451         error = synaptics_set_mode(psmouse);
1452         if (error) {
1453                 psmouse_err(psmouse, "Unable to initialize device.\n");
1454                 return error;
1455         }
1456
1457         if (info.identity != priv->info.identity ||
1458             info.model_id != priv->info.model_id ||
1459             info.capabilities != priv->info.capabilities ||
1460             info.ext_cap != priv->info.ext_cap) {
1461                 psmouse_err(psmouse,
1462                             "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n",
1463                             priv->info.identity, info.identity,
1464                             priv->info.model_id, info.model_id,
1465                             priv->info.capabilities, info.capabilities,
1466                             priv->info.ext_cap, info.ext_cap);
1467                 return -ENXIO;
1468         }
1469
1470         return 0;
1471 }
1472
1473 static bool impaired_toshiba_kbc;
1474
1475 static const struct dmi_system_id toshiba_dmi_table[] __initconst = {
1476 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1477         {
1478                 /* Toshiba Satellite */
1479                 .matches = {
1480                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1481                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1482                 },
1483         },
1484         {
1485                 /* Toshiba Dynabook */
1486                 .matches = {
1487                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1488                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1489                 },
1490         },
1491         {
1492                 /* Toshiba Portege M300 */
1493                 .matches = {
1494                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1495                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1496                 },
1497
1498         },
1499         {
1500                 /* Toshiba Portege M300 */
1501                 .matches = {
1502                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1503                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1504                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1505                 },
1506
1507         },
1508 #endif
1509         { }
1510 };
1511
1512 static bool broken_olpc_ec;
1513
1514 static const struct dmi_system_id olpc_dmi_table[] __initconst = {
1515 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1516         {
1517                 /* OLPC XO-1 or XO-1.5 */
1518                 .matches = {
1519                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1520                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1521                 },
1522         },
1523 #endif
1524         { }
1525 };
1526
1527 static const struct dmi_system_id __initconst cr48_dmi_table[] = {
1528 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1529         {
1530                 /* Cr-48 Chromebook (Codename Mario) */
1531                 .matches = {
1532                         DMI_MATCH(DMI_SYS_VENDOR, "IEC"),
1533                         DMI_MATCH(DMI_PRODUCT_NAME, "Mario"),
1534                 },
1535         },
1536 #endif
1537         { }
1538 };
1539
1540 void __init synaptics_module_init(void)
1541 {
1542         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1543         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1544         cr48_profile_sensor = dmi_check_system(cr48_dmi_table);
1545 }
1546
1547 static int synaptics_init_ps2(struct psmouse *psmouse,
1548                               struct synaptics_device_info *info,
1549                               bool absolute_mode)
1550 {
1551         struct synaptics_data *priv;
1552         int err;
1553
1554         synaptics_apply_quirks(psmouse, info);
1555
1556         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1557         if (!priv)
1558                 return -ENOMEM;
1559
1560         priv->info = *info;
1561         priv->absolute_mode = absolute_mode;
1562         if (SYN_ID_DISGEST_SUPPORTED(info->identity))
1563                 priv->disable_gesture = true;
1564
1565         /*
1566          * Unfortunately ForcePad capability is not exported over PS/2,
1567          * so we have to resort to checking PNP IDs.
1568          */
1569         priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids);
1570
1571         err = synaptics_set_mode(psmouse);
1572         if (err) {
1573                 psmouse_err(psmouse, "Unable to initialize device.\n");
1574                 goto init_fail;
1575         }
1576
1577         priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ?
1578                                         SYN_NEWABS : SYN_OLDABS;
1579
1580         psmouse_info(psmouse,
1581                      "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n",
1582                      SYN_ID_MODEL(info->identity),
1583                      SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity),
1584                      info->model_id,
1585                      info->capabilities, info->ext_cap, info->ext_cap_0c,
1586                      info->ext_cap_10, info->board_id, info->firmware_id);
1587
1588         err = set_input_params(psmouse, priv);
1589         if (err) {
1590                 psmouse_err(psmouse,
1591                             "failed to set up capabilities: %d\n", err);
1592                 goto init_fail;
1593         }
1594
1595         /*
1596          * Encode touchpad model so that it can be used to set
1597          * input device->id.version and be visible to userspace.
1598          * Because version is __u16 we have to drop something.
1599          * Hardware info bits seem to be good candidates as they
1600          * are documented to be for Synaptics corp. internal use.
1601          */
1602         psmouse->model = ((info->model_id & 0x00ff0000) >> 8) |
1603                           (info->model_id & 0x000000ff);
1604
1605         if (absolute_mode) {
1606                 psmouse->protocol_handler = synaptics_process_byte;
1607                 psmouse->pktsize = 6;
1608         } else {
1609                 /* Relative mode follows standard PS/2 mouse protocol */
1610                 psmouse->protocol_handler = psmouse_process_byte;
1611                 psmouse->pktsize = 3;
1612         }
1613
1614         psmouse->set_rate = synaptics_set_rate;
1615         psmouse->disconnect = synaptics_disconnect;
1616         psmouse->reconnect = synaptics_reconnect;
1617         psmouse->cleanup = synaptics_reset;
1618         /* Synaptics can usually stay in sync without extra help */
1619         psmouse->resync_time = 0;
1620
1621         if (SYN_CAP_PASS_THROUGH(info->capabilities))
1622                 synaptics_pt_create(psmouse);
1623
1624         /*
1625          * Toshiba's KBC seems to have trouble handling data from
1626          * Synaptics at full rate.  Switch to a lower rate (roughly
1627          * the same rate as a standard PS/2 mouse).
1628          */
1629         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1630                 psmouse_info(psmouse,
1631                              "Toshiba %s detected, limiting rate to 40pps.\n",
1632                              dmi_get_system_info(DMI_PRODUCT_NAME));
1633                 psmouse->rate = 40;
1634         }
1635
1636         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) {
1637                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1638                                          &psmouse_attr_disable_gesture.dattr);
1639                 if (err) {
1640                         psmouse_err(psmouse,
1641                                     "Failed to create disable_gesture attribute (%d)",
1642                                     err);
1643                         goto init_fail;
1644                 }
1645         }
1646
1647         return 0;
1648
1649  init_fail:
1650         kfree(priv);
1651         return err;
1652 }
1653
1654 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1655 {
1656         struct synaptics_device_info info;
1657         int error;
1658
1659         psmouse_reset(psmouse);
1660
1661         error = synaptics_query_hardware(psmouse, &info);
1662         if (error) {
1663                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1664                 return error;
1665         }
1666
1667         return synaptics_init_ps2(psmouse, &info, absolute_mode);
1668 }
1669
1670 int synaptics_init_absolute(struct psmouse *psmouse)
1671 {
1672         return __synaptics_init(psmouse, true);
1673 }
1674
1675 int synaptics_init_relative(struct psmouse *psmouse)
1676 {
1677         return __synaptics_init(psmouse, false);
1678 }
1679
1680 static int synaptics_setup_ps2(struct psmouse *psmouse,
1681                                struct synaptics_device_info *info)
1682 {
1683         bool absolute_mode = true;
1684         int error;
1685
1686         /*
1687          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1688          * packet spew overloads the EC such that key presses on the keyboard
1689          * are missed.  Given that, don't even attempt to use Absolute mode.
1690          * Relative mode seems to work just fine.
1691          */
1692         if (broken_olpc_ec) {
1693                 psmouse_info(psmouse,
1694                              "OLPC XO detected, forcing relative protocol.\n");
1695                 absolute_mode = false;
1696         }
1697
1698         error = synaptics_init_ps2(psmouse, info, absolute_mode);
1699         if (error)
1700                 return error;
1701
1702         return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE;
1703 }
1704
1705 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1706
1707 void __init synaptics_module_init(void)
1708 {
1709 }
1710
1711 static int __maybe_unused
1712 synaptics_setup_ps2(struct psmouse *psmouse,
1713                     struct synaptics_device_info *info)
1714 {
1715         return -ENOSYS;
1716 }
1717
1718 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
1719
1720 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
1721
1722 /*
1723  * The newest Synaptics device can use a secondary bus (called InterTouch) which
1724  * provides a better bandwidth and allow a better control of the touchpads.
1725  * This is used to decide if we need to use this bus or not.
1726  */
1727 enum {
1728         SYNAPTICS_INTERTOUCH_NOT_SET = -1,
1729         SYNAPTICS_INTERTOUCH_OFF,
1730         SYNAPTICS_INTERTOUCH_ON,
1731 };
1732
1733 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ?
1734                 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF;
1735 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644);
1736 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device.");
1737
1738 static int synaptics_create_intertouch(struct psmouse *psmouse,
1739                                        struct synaptics_device_info *info,
1740                                        bool leave_breadcrumbs)
1741 {
1742         bool topbuttonpad =
1743                 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1744                 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10);
1745         const struct rmi_device_platform_data pdata = {
1746                 .sensor_pdata = {
1747                         .sensor_type = rmi_sensor_touchpad,
1748                         .axis_align.flip_y = true,
1749                         .kernel_tracking = false,
1750                         .topbuttonpad = topbuttonpad,
1751                 },
1752                 .f30_data = {
1753                         .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c),
1754                         .trackstick_buttons =
1755                                 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10),
1756                 },
1757         };
1758         const struct i2c_board_info intertouch_board = {
1759                 I2C_BOARD_INFO("rmi4_smbus", 0x2c),
1760                 .flags = I2C_CLIENT_HOST_NOTIFY,
1761         };
1762
1763         return psmouse_smbus_init(psmouse, &intertouch_board,
1764                                   &pdata, sizeof(pdata), true,
1765                                   leave_breadcrumbs);
1766 }
1767
1768 /**
1769  * synaptics_setup_intertouch - called once the PS/2 devices are enumerated
1770  * and decides to instantiate a SMBus InterTouch device.
1771  */
1772 static int synaptics_setup_intertouch(struct psmouse *psmouse,
1773                                       struct synaptics_device_info *info,
1774                                       bool leave_breadcrumbs)
1775 {
1776         int error;
1777
1778         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF)
1779                 return -ENXIO;
1780
1781         if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) {
1782                 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) &&
1783                     !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) {
1784
1785                         if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids))
1786                                 psmouse_info(psmouse,
1787                                              "Your touchpad (%s) says it can support a different bus. "
1788                                              "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",
1789                                              psmouse->ps2dev.serio->firmware_id);
1790
1791                         return -ENXIO;
1792                 }
1793         }
1794
1795         psmouse_info(psmouse, "Trying to set up SMBus access\n");
1796
1797         error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs);
1798         if (error) {
1799                 if (error == -EAGAIN)
1800                         psmouse_info(psmouse, "SMbus companion is not ready yet\n");
1801                 else
1802                         psmouse_err(psmouse, "unable to create intertouch device\n");
1803
1804                 return error;
1805         }
1806
1807         return 0;
1808 }
1809
1810 int synaptics_init_smbus(struct psmouse *psmouse)
1811 {
1812         struct synaptics_device_info info;
1813         int error;
1814
1815         psmouse_reset(psmouse);
1816
1817         error = synaptics_query_hardware(psmouse, &info);
1818         if (error) {
1819                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1820                 return error;
1821         }
1822
1823         if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c))
1824                 return -ENXIO;
1825
1826         return synaptics_create_intertouch(psmouse, &info, false);
1827 }
1828
1829 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1830
1831 static int __maybe_unused
1832 synaptics_setup_intertouch(struct psmouse *psmouse,
1833                            struct synaptics_device_info *info,
1834                            bool leave_breadcrumbs)
1835 {
1836         return -ENOSYS;
1837 }
1838
1839 int synaptics_init_smbus(struct psmouse *psmouse)
1840 {
1841         return -ENOSYS;
1842 }
1843
1844 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1845
1846 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \
1847     defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)
1848
1849 int synaptics_init(struct psmouse *psmouse)
1850 {
1851         struct synaptics_device_info info;
1852         int error;
1853         int retval;
1854
1855         psmouse_reset(psmouse);
1856
1857         error = synaptics_query_hardware(psmouse, &info);
1858         if (error) {
1859                 psmouse_err(psmouse, "Unable to query device: %d\n", error);
1860                 return error;
1861         }
1862
1863         if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) {
1864                 if ((!IS_ENABLED(CONFIG_RMI4_SMB) ||
1865                      !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) &&
1866                     /* Forcepads need F21, which is not ready */
1867                     !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) {
1868                         psmouse_warn(psmouse,
1869                                      "The touchpad can support a better bus than the too old PS/2 protocol. "
1870                                      "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n");
1871                 }
1872
1873                 error = synaptics_setup_intertouch(psmouse, &info, true);
1874                 if (!error)
1875                         return PSMOUSE_SYNAPTICS_SMBUS;
1876         }
1877
1878         retval = synaptics_setup_ps2(psmouse, &info);
1879         if (retval < 0) {
1880                 /*
1881                  * Not using any flavor of Synaptics support, so clean up
1882                  * SMbus breadcrumbs, if any.
1883                  */
1884                 psmouse_smbus_cleanup(psmouse);
1885         }
1886
1887         return retval;
1888 }
1889
1890 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
1891
1892 int synaptics_init(struct psmouse *psmouse)
1893 {
1894         return -ENOSYS;
1895 }
1896
1897 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */