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