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synaptics.c
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linux-6.19.14/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 */ 79static 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 96int 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 118void 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. */ 128static 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#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 165static const char * const smbus_pnp_ids[] = { 166 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */ 167 "DLL060d", /* Dell Precision M3800 */ 168 "LEN0048", /* X1 Carbon 3 */ 169 "LEN0046", /* X250 */ 170 "LEN0049", /* Yoga 11e */ 171 "LEN004a", /* W541 */ 172 "LEN005b", /* P50 */ 173 "LEN005e", /* T560 */ 174 "LEN006c", /* T470s */ 175 "LEN007a", /* T470s */ 176 "LEN0071", /* T480 */ 177 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 178 "LEN0073", /* X1 Carbon G5 (Elantech) */ 179 "LEN0091", /* X1 Carbon 6 */ 180 "LEN0092", /* X1 Carbon 6 */ 181 "LEN0093", /* T480 */ 182 "LEN0096", /* X280 */ 183 "LEN0097", /* X280 -> ALPS trackpoint */ 184 "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */ 185 "LEN009b", /* T580 */ 186 "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */ 187 "LEN040f", /* P1 Gen 3 */ 188 "LEN0411", /* L14 Gen 1 */ 189 "LEN200f", /* T450s */ 190 "LEN2044", /* L470 */ 191 "LEN2054", /* E480 */ 192 "LEN2055", /* E580 */ 193 "LEN2068", /* T14 Gen 1 */ 194 "SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */ 195 "SYN3003", /* HP EliteBook 850 G1 */ 196 "SYN3015", /* HP EliteBook 840 G2 */ 197 "SYN3052", /* HP EliteBook 840 G4 */ 198 "SYN3221", /* HP 15-ay000 */ 199 "SYN323d", /* HP Spectre X360 13-w013dx */ 200 "SYN3257", /* HP Envy 13-ad105ng */ 201 "TOS01f6", /* Dynabook Portege X30L-G */ 202 "TOS0213", /* Dynabook Portege X30-D */ 203 NULL 204}; 205#endif 206 207static const char * const forcepad_pnp_ids[] = { 208 "SYN300D", 209 "SYN3014", 210 NULL 211}; 212 213/* 214 * Send a command to the synaptics touchpad by special commands 215 */ 216static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 217{ 218 int error; 219 220 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 221 if (error) 222 return error; 223 224 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 225 if (error) 226 return error; 227 228 return 0; 229} 230 231static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 232{ 233 int error; 234 union { 235 __be32 be_val; 236 char buf[4]; 237 } resp = { 0 }; 238 239 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 240 if (error) 241 return error; 242 243 *val = be32_to_cpu(resp.be_val); 244 return 0; 245} 246 247/* 248 * Identify Touchpad 249 * See also the SYN_ID_* macros 250 */ 251static int synaptics_identify(struct psmouse *psmouse, 252 struct synaptics_device_info *info) 253{ 254 int error; 255 256 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 257 if (error) 258 return error; 259 260 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 261} 262 263/* 264 * Read the model-id bytes from the touchpad 265 * see also SYN_MODEL_* macros 266 */ 267static int synaptics_model_id(struct psmouse *psmouse, 268 struct synaptics_device_info *info) 269{ 270 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 271} 272 273/* 274 * Read the firmware id from the touchpad 275 */ 276static int synaptics_firmware_id(struct psmouse *psmouse, 277 struct synaptics_device_info *info) 278{ 279 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 280 &info->firmware_id); 281} 282 283/* 284 * Read the board id and the "More Extended Queries" from the touchpad 285 * The board id is encoded in the "QUERY MODES" response 286 */ 287static int synaptics_query_modes(struct psmouse *psmouse, 288 struct synaptics_device_info *info) 289{ 290 u8 bid[3]; 291 int error; 292 293 /* firmwares prior 7.5 have no board_id encoded */ 294 if (SYN_ID_FULL(info->identity) < 0x705) 295 return 0; 296 297 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 298 if (error) 299 return error; 300 301 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 302 303 if (SYN_MEXT_CAP_BIT(bid[0])) 304 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 305 &info->ext_cap_10); 306 307 return 0; 308} 309 310/* 311 * Read the capability-bits from the touchpad 312 * see also the SYN_CAP_* macros 313 */ 314static int synaptics_capability(struct psmouse *psmouse, 315 struct synaptics_device_info *info) 316{ 317 int error; 318 319 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 320 &info->capabilities); 321 if (error) 322 return error; 323 324 info->ext_cap = info->ext_cap_0c = 0; 325 326 /* 327 * Older firmwares had submodel ID fixed to 0x47 328 */ 329 if (SYN_ID_FULL(info->identity) < 0x705 && 330 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 331 return -ENXIO; 332 } 333 334 /* 335 * Unless capExtended is set the rest of the flags should be ignored 336 */ 337 if (!SYN_CAP_EXTENDED(info->capabilities)) 338 info->capabilities = 0; 339 340 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 341 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 342 &info->ext_cap); 343 if (error) { 344 psmouse_warn(psmouse, 345 "device claims to have extended capabilities, but I'm not able to read them.\n"); 346 } else { 347 /* 348 * if nExtBtn is greater than 8 it should be considered 349 * invalid and treated as 0 350 */ 351 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 352 info->ext_cap &= ~SYN_CAP_MB_MASK; 353 } 354 } 355 356 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 357 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 358 &info->ext_cap_0c); 359 if (error) 360 psmouse_warn(psmouse, 361 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 362 } 363 364 return 0; 365} 366 367/* 368 * Read touchpad resolution and maximum reported coordinates 369 * Resolution is left zero if touchpad does not support the query 370 */ 371static int synaptics_resolution(struct psmouse *psmouse, 372 struct synaptics_device_info *info) 373{ 374 u8 resp[3]; 375 int error; 376 377 if (SYN_ID_MAJOR(info->identity) < 4) 378 return 0; 379 380 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 381 if (!error) { 382 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 383 info->x_res = resp[0]; /* x resolution in units/mm */ 384 info->y_res = resp[2]; /* y resolution in units/mm */ 385 } 386 } 387 388 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 389 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 390 error = synaptics_send_cmd(psmouse, 391 SYN_QUE_EXT_MAX_COORDS, resp); 392 if (error) { 393 psmouse_warn(psmouse, 394 "device claims to have max coordinates query, but I'm not able to read it.\n"); 395 } else { 396 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 397 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 398 psmouse_info(psmouse, 399 "queried max coordinates: x [..%d], y [..%d]\n", 400 info->x_max, info->y_max); 401 } 402 } 403 404 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 405 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 406 /* 407 * Firmware v8.1 does not report proper number of extended 408 * capabilities, but has been proven to report correct min 409 * coordinates. 410 */ 411 SYN_ID_FULL(info->identity) == 0x801)) { 412 error = synaptics_send_cmd(psmouse, 413 SYN_QUE_EXT_MIN_COORDS, resp); 414 if (error) { 415 psmouse_warn(psmouse, 416 "device claims to have min coordinates query, but I'm not able to read it.\n"); 417 } else { 418 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 419 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 420 psmouse_info(psmouse, 421 "queried min coordinates: x [%d..], y [%d..]\n", 422 info->x_min, info->y_min); 423 } 424 } 425 426 return 0; 427} 428 429static int synaptics_query_hardware(struct psmouse *psmouse, 430 struct synaptics_device_info *info) 431{ 432 int error; 433 434 memset(info, 0, sizeof(*info)); 435 436 error = synaptics_identify(psmouse, info); 437 if (error) 438 return error; 439 440 error = synaptics_model_id(psmouse, info); 441 if (error) 442 return error; 443 444 error = synaptics_firmware_id(psmouse, info); 445 if (error) 446 return error; 447 448 error = synaptics_query_modes(psmouse, info); 449 if (error) 450 return error; 451 452 error = synaptics_capability(psmouse, info); 453 if (error) 454 return error; 455 456 error = synaptics_resolution(psmouse, info); 457 if (error) 458 return error; 459 460 return 0; 461} 462 463#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 464 465#ifdef CONFIG_MOUSE_PS2_SYNAPTICS 466 467static bool cr48_profile_sensor; 468 469#define ANY_BOARD_ID 0 470struct min_max_quirk { 471 const char * const *pnp_ids; 472 struct { 473 u32 min, max; 474 } board_id; 475 u32 x_min, x_max, y_min, y_max; 476}; 477 478static const struct min_max_quirk min_max_pnpid_table[] = { 479 { 480 (const char * const []){"LEN0033", NULL}, 481 {ANY_BOARD_ID, ANY_BOARD_ID}, 482 1024, 5052, 2258, 4832 483 }, 484 { 485 (const char * const []){"LEN0042", NULL}, 486 {ANY_BOARD_ID, ANY_BOARD_ID}, 487 1232, 5710, 1156, 4696 488 }, 489 { 490 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 491 "LEN0039", "LEN2002", "LEN2004", 492 NULL}, 493 {ANY_BOARD_ID, 2961}, 494 1024, 5112, 2024, 4832 495 }, 496 { 497 (const char * const []){"LEN2000", NULL}, 498 {ANY_BOARD_ID, ANY_BOARD_ID}, 499 1024, 5113, 2021, 4832 500 }, 501 { 502 (const char * const []){"LEN2001", NULL}, 503 {ANY_BOARD_ID, ANY_BOARD_ID}, 504 1024, 5022, 2508, 4832 505 }, 506 { 507 (const char * const []){"LEN2006", NULL}, 508 {2691, 2691}, 509 1024, 5045, 2457, 4832 510 }, 511 { 512 (const char * const []){"LEN2006", NULL}, 513 {ANY_BOARD_ID, ANY_BOARD_ID}, 514 1264, 5675, 1171, 4688 515 }, 516 { } 517}; 518 519/***************************************************************************** 520 * Synaptics communications functions 521 ****************************************************************************/ 522 523/* 524 * Synaptics touchpads report the y coordinate from bottom to top, which is 525 * opposite from what userspace expects. 526 * This function is used to invert y before reporting. 527 */ 528static int synaptics_invert_y(int y) 529{ 530 return YMAX_NOMINAL + YMIN_NOMINAL - y; 531} 532 533/* 534 * Apply quirk(s) if the hardware matches 535 */ 536static void synaptics_apply_quirks(struct psmouse *psmouse, 537 struct synaptics_device_info *info) 538{ 539 int i; 540 541 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 542 if (!psmouse_matches_pnp_id(psmouse, 543 min_max_pnpid_table[i].pnp_ids)) 544 continue; 545 546 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 547 info->board_id < min_max_pnpid_table[i].board_id.min) 548 continue; 549 550 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 551 info->board_id > min_max_pnpid_table[i].board_id.max) 552 continue; 553 554 info->x_min = min_max_pnpid_table[i].x_min; 555 info->x_max = min_max_pnpid_table[i].x_max; 556 info->y_min = min_max_pnpid_table[i].y_min; 557 info->y_max = min_max_pnpid_table[i].y_max; 558 psmouse_info(psmouse, 559 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 560 info->x_min, info->x_max, 561 info->y_min, info->y_max); 562 break; 563 } 564} 565 566static bool synaptics_has_agm(struct synaptics_data *priv) 567{ 568 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 569 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 570} 571 572static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 573{ 574 static u8 param = 0xc8; 575 int error; 576 577 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 578 if (error) 579 return error; 580 581 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 582 if (error) 583 return error; 584 585 return 0; 586} 587 588static int synaptics_set_mode(struct psmouse *psmouse) 589{ 590 struct synaptics_data *priv = psmouse->private; 591 int error; 592 593 priv->mode = 0; 594 if (priv->absolute_mode) 595 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 596 if (priv->disable_gesture) 597 priv->mode |= SYN_BIT_DISABLE_GESTURE; 598 if (psmouse->rate >= 80) 599 priv->mode |= SYN_BIT_HIGH_RATE; 600 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 601 priv->mode |= SYN_BIT_W_MODE; 602 603 error = synaptics_mode_cmd(psmouse, priv->mode); 604 if (error) 605 return error; 606 607 if (priv->absolute_mode && synaptics_has_agm(priv)) { 608 error = synaptics_set_advanced_gesture_mode(psmouse); 609 if (error) { 610 psmouse_err(psmouse, 611 "Advanced gesture mode init failed: %d\n", 612 error); 613 return error; 614 } 615 } 616 617 return 0; 618} 619 620static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 621{ 622 struct synaptics_data *priv = psmouse->private; 623 624 if (rate >= 80) { 625 priv->mode |= SYN_BIT_HIGH_RATE; 626 psmouse->rate = 80; 627 } else { 628 priv->mode &= ~SYN_BIT_HIGH_RATE; 629 psmouse->rate = 40; 630 } 631 632 synaptics_mode_cmd(psmouse, priv->mode); 633} 634 635/***************************************************************************** 636 * Synaptics pass-through PS/2 port support 637 ****************************************************************************/ 638static int synaptics_pt_write(struct serio *serio, u8 c) 639{ 640 struct psmouse *parent = psmouse_from_serio(serio->parent); 641 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 642 int error; 643 644 error = ps2_sliced_command(&parent->ps2dev, c); 645 if (error) 646 return error; 647 648 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 649 if (error) 650 return error; 651 652 return 0; 653} 654 655static int synaptics_pt_start(struct serio *serio) 656{ 657 struct psmouse *parent = psmouse_from_serio(serio->parent); 658 struct synaptics_data *priv = parent->private; 659 660 guard(serio_pause_rx)(parent->ps2dev.serio); 661 priv->pt_port = serio; 662 663 return 0; 664} 665 666static void synaptics_pt_stop(struct serio *serio) 667{ 668 struct psmouse *parent = psmouse_from_serio(serio->parent); 669 struct synaptics_data *priv = parent->private; 670 671 guard(serio_pause_rx)(parent->ps2dev.serio); 672 priv->pt_port = NULL; 673} 674 675static int synaptics_pt_open(struct serio *serio) 676{ 677 struct psmouse *parent = psmouse_from_serio(serio->parent); 678 struct synaptics_data *priv = parent->private; 679 680 guard(serio_pause_rx)(parent->ps2dev.serio); 681 priv->pt_port_open = true; 682 683 return 0; 684} 685 686static void synaptics_pt_close(struct serio *serio) 687{ 688 struct psmouse *parent = psmouse_from_serio(serio->parent); 689 struct synaptics_data *priv = parent->private; 690 691 guard(serio_pause_rx)(parent->ps2dev.serio); 692 priv->pt_port_open = false; 693} 694 695static int synaptics_is_pt_packet(u8 *buf) 696{ 697 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 698} 699 700static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet) 701{ 702 struct serio *ptport; 703 704 ptport = priv->pt_port; 705 if (!ptport) 706 return; 707 708 serio_interrupt(ptport, packet[1], 0); 709 710 if (priv->pt_port_open) { 711 struct psmouse *child = psmouse_from_serio(ptport); 712 713 if (child->state == PSMOUSE_ACTIVATED) { 714 serio_interrupt(ptport, packet[4], 0); 715 serio_interrupt(ptport, packet[5], 0); 716 if (child->pktsize == 4) 717 serio_interrupt(ptport, packet[2], 0); 718 } 719 } 720} 721 722static void synaptics_pt_activate(struct psmouse *psmouse) 723{ 724 struct synaptics_data *priv = psmouse->private; 725 struct psmouse *child = psmouse_from_serio(priv->pt_port); 726 727 /* adjust the touchpad to child's choice of protocol */ 728 if (child) { 729 if (child->pktsize == 4) 730 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 731 else 732 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 733 734 if (synaptics_mode_cmd(psmouse, priv->mode)) 735 psmouse_warn(psmouse, 736 "failed to switch guest protocol\n"); 737 } 738} 739 740static void synaptics_pt_create(struct psmouse *psmouse) 741{ 742 struct serio *serio; 743 744 serio = kzalloc(sizeof(*serio), GFP_KERNEL); 745 if (!serio) { 746 psmouse_err(psmouse, 747 "not enough memory for pass-through port\n"); 748 return; 749 } 750 751 serio->id.type = SERIO_PS_PSTHRU; 752 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 753 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 754 serio->write = synaptics_pt_write; 755 serio->start = synaptics_pt_start; 756 serio->stop = synaptics_pt_stop; 757 serio->open = synaptics_pt_open; 758 serio->close = synaptics_pt_close; 759 serio->parent = psmouse->ps2dev.serio; 760 761 psmouse->pt_activate = synaptics_pt_activate; 762 763 psmouse_info(psmouse, "serio: %s port at %s\n", 764 serio->name, psmouse->phys); 765 serio_register_port(serio); 766} 767 768/***************************************************************************** 769 * Functions to interpret the absolute mode packets 770 ****************************************************************************/ 771 772static void synaptics_parse_agm(const u8 buf[], 773 struct synaptics_data *priv, 774 struct synaptics_hw_state *hw) 775{ 776 struct synaptics_hw_state *agm = &priv->agm; 777 int agm_packet_type; 778 779 agm_packet_type = (buf[5] & 0x30) >> 4; 780 switch (agm_packet_type) { 781 case 1: 782 /* Gesture packet: (x, y, z) half resolution */ 783 agm->w = hw->w; 784 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 785 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 786 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 787 break; 788 789 case 2: 790 /* AGM-CONTACT packet: we are only interested in the count */ 791 priv->agm_count = buf[1]; 792 break; 793 794 default: 795 break; 796 } 797} 798 799static void synaptics_parse_ext_buttons(const u8 buf[], 800 struct synaptics_data *priv, 801 struct synaptics_hw_state *hw) 802{ 803 unsigned int ext_bits = 804 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 805 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 806 807 hw->ext_buttons = buf[4] & ext_mask; 808 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 809} 810 811static int synaptics_parse_hw_state(const u8 buf[], 812 struct synaptics_data *priv, 813 struct synaptics_hw_state *hw) 814{ 815 memset(hw, 0, sizeof(struct synaptics_hw_state)); 816 817 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 818 hw->w = (((buf[0] & 0x30) >> 2) | 819 ((buf[0] & 0x04) >> 1) | 820 ((buf[3] & 0x04) >> 2)); 821 822 if (synaptics_has_agm(priv) && hw->w == 2) { 823 synaptics_parse_agm(buf, priv, hw); 824 return 1; 825 } 826 827 hw->x = (((buf[3] & 0x10) << 8) | 828 ((buf[1] & 0x0f) << 8) | 829 buf[4]); 830 hw->y = (((buf[3] & 0x20) << 7) | 831 ((buf[1] & 0xf0) << 4) | 832 buf[5]); 833 hw->z = buf[2]; 834 835 hw->left = (buf[0] & 0x01) ? 1 : 0; 836 hw->right = (buf[0] & 0x02) ? 1 : 0; 837 838 if (priv->is_forcepad) { 839 /* 840 * ForcePads, like Clickpads, use middle button 841 * bits to report primary button clicks. 842 * Unfortunately they report primary button not 843 * only when user presses on the pad above certain 844 * threshold, but also when there are more than one 845 * finger on the touchpad, which interferes with 846 * out multi-finger gestures. 847 */ 848 if (hw->z == 0) { 849 /* No contacts */ 850 priv->press = priv->report_press = false; 851 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 852 /* 853 * Single-finger touch with pressure above 854 * the threshold. If pressure stays long 855 * enough, we'll start reporting primary 856 * button. We rely on the device continuing 857 * sending data even if finger does not 858 * move. 859 */ 860 if (!priv->press) { 861 priv->press_start = jiffies; 862 priv->press = true; 863 } else if (time_after(jiffies, 864 priv->press_start + 865 msecs_to_jiffies(50))) { 866 priv->report_press = true; 867 } 868 } else { 869 priv->press = false; 870 } 871 872 hw->left = priv->report_press; 873 874 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 875 /* 876 * Clickpad's button is transmitted as middle button, 877 * however, since it is primary button, we will report 878 * it as BTN_LEFT. 879 */ 880 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 881 882 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 883 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 884 if (hw->w == 2) 885 hw->scroll = (s8)buf[1]; 886 } 887 888 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 889 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 890 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 891 } 892 893 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 894 ((buf[0] ^ buf[3]) & 0x02)) { 895 synaptics_parse_ext_buttons(buf, priv, hw); 896 } 897 } else { 898 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 899 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 900 901 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 902 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 903 904 hw->left = (buf[0] & 0x01) ? 1 : 0; 905 hw->right = (buf[0] & 0x02) ? 1 : 0; 906 } 907 908 /* 909 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 910 * is used by some firmware to indicate a finger at the edge of 911 * the touchpad whose precise position cannot be determined, so 912 * convert these values to the maximum axis value. 913 */ 914 if (hw->x > X_MAX_POSITIVE) 915 hw->x -= 1 << ABS_POS_BITS; 916 else if (hw->x == X_MAX_POSITIVE) 917 hw->x = XMAX; 918 919 if (hw->y > Y_MAX_POSITIVE) 920 hw->y -= 1 << ABS_POS_BITS; 921 else if (hw->y == Y_MAX_POSITIVE) 922 hw->y = YMAX; 923 924 return 0; 925} 926 927static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 928 bool active, int x, int y) 929{ 930 input_mt_slot(dev, slot); 931 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 932 if (active) { 933 input_report_abs(dev, ABS_MT_POSITION_X, x); 934 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 935 } 936} 937 938static void synaptics_report_semi_mt_data(struct input_dev *dev, 939 const struct synaptics_hw_state *a, 940 const struct synaptics_hw_state *b, 941 int num_fingers) 942{ 943 if (num_fingers >= 2) { 944 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 945 min(a->y, b->y)); 946 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 947 max(a->y, b->y)); 948 } else if (num_fingers == 1) { 949 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 950 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 951 } else { 952 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 953 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 954 } 955} 956 957static void synaptics_report_ext_buttons(struct psmouse *psmouse, 958 const struct synaptics_hw_state *hw) 959{ 960 struct input_dev *dev = psmouse->dev; 961 struct synaptics_data *priv = psmouse->private; 962 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 963 int i; 964 965 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 966 return; 967 968 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 969 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 970 SYN_ID_FULL(priv->info.identity) == 0x802) && 971 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 972 return; 973 974 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 975 for (i = 0; i < ext_bits; i++) { 976 input_report_key(dev, BTN_0 + 2 * i, 977 hw->ext_buttons & BIT(i)); 978 input_report_key(dev, BTN_1 + 2 * i, 979 hw->ext_buttons & BIT(i + ext_bits)); 980 } 981 return; 982 } 983 984 /* 985 * This generation of touchpads has the trackstick buttons 986 * physically wired to the touchpad. Re-route them through 987 * the pass-through interface. 988 */ 989 if (priv->pt_port) { 990 u8 pt_buttons; 991 992 /* The trackstick expects at most 3 buttons */ 993 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 994 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 995 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 996 997 serio_interrupt(priv->pt_port, 998 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 999 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 1000 } 1001} 1002 1003static void synaptics_report_buttons(struct psmouse *psmouse, 1004 const struct synaptics_hw_state *hw) 1005{ 1006 struct input_dev *dev = psmouse->dev; 1007 struct synaptics_data *priv = psmouse->private; 1008 1009 input_report_key(dev, BTN_LEFT, hw->left); 1010 input_report_key(dev, BTN_RIGHT, hw->right); 1011 1012 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 1013 input_report_key(dev, BTN_MIDDLE, hw->middle); 1014 1015 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 1016 input_report_key(dev, BTN_FORWARD, hw->up); 1017 input_report_key(dev, BTN_BACK, hw->down); 1018 } 1019 1020 synaptics_report_ext_buttons(psmouse, hw); 1021} 1022 1023static void synaptics_report_mt_data(struct psmouse *psmouse, 1024 const struct synaptics_hw_state *sgm, 1025 int num_fingers) 1026{ 1027 struct input_dev *dev = psmouse->dev; 1028 struct synaptics_data *priv = psmouse->private; 1029 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 1030 struct input_mt_pos pos[2]; 1031 int slot[2], nsemi, i; 1032 1033 nsemi = clamp_val(num_fingers, 0, 2); 1034 1035 for (i = 0; i < nsemi; i++) { 1036 pos[i].x = hw[i]->x; 1037 pos[i].y = synaptics_invert_y(hw[i]->y); 1038 } 1039 1040 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 1041 1042 for (i = 0; i < nsemi; i++) { 1043 input_mt_slot(dev, slot[i]); 1044 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1045 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1046 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1047 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1048 } 1049 1050 input_mt_drop_unused(dev); 1051 1052 /* Don't use active slot count to generate BTN_TOOL events. */ 1053 input_mt_report_pointer_emulation(dev, false); 1054 1055 /* Send the number of fingers reported by touchpad itself. */ 1056 input_mt_report_finger_count(dev, num_fingers); 1057 1058 synaptics_report_buttons(psmouse, sgm); 1059 1060 input_sync(dev); 1061} 1062 1063static void synaptics_image_sensor_process(struct psmouse *psmouse, 1064 struct synaptics_hw_state *sgm) 1065{ 1066 struct synaptics_data *priv = psmouse->private; 1067 int num_fingers; 1068 1069 /* 1070 * Update mt_state using the new finger count and current mt_state. 1071 */ 1072 if (sgm->z == 0) 1073 num_fingers = 0; 1074 else if (sgm->w >= 4) 1075 num_fingers = 1; 1076 else if (sgm->w == 0) 1077 num_fingers = 2; 1078 else if (sgm->w == 1) 1079 num_fingers = priv->agm_count ? priv->agm_count : 3; 1080 else 1081 num_fingers = 4; 1082 1083 /* Send resulting input events to user space */ 1084 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1085} 1086 1087static bool synaptics_has_multifinger(struct synaptics_data *priv) 1088{ 1089 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1090 return true; 1091 1092 /* Advanced gesture mode also sends multi finger data */ 1093 return synaptics_has_agm(priv); 1094} 1095 1096/* 1097 * called for each full received packet from the touchpad 1098 */ 1099static void synaptics_process_packet(struct psmouse *psmouse) 1100{ 1101 struct input_dev *dev = psmouse->dev; 1102 struct synaptics_data *priv = psmouse->private; 1103 struct synaptics_device_info *info = &priv->info; 1104 struct synaptics_hw_state hw; 1105 int num_fingers; 1106 int finger_width; 1107 1108 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1109 return; 1110 1111 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1112 synaptics_image_sensor_process(psmouse, &hw); 1113 return; 1114 } 1115 1116 if (hw.scroll) { 1117 priv->scroll += hw.scroll; 1118 1119 while (priv->scroll >= 4) { 1120 input_report_key(dev, BTN_BACK, !hw.down); 1121 input_sync(dev); 1122 input_report_key(dev, BTN_BACK, hw.down); 1123 input_sync(dev); 1124 priv->scroll -= 4; 1125 } 1126 while (priv->scroll <= -4) { 1127 input_report_key(dev, BTN_FORWARD, !hw.up); 1128 input_sync(dev); 1129 input_report_key(dev, BTN_FORWARD, hw.up); 1130 input_sync(dev); 1131 priv->scroll += 4; 1132 } 1133 return; 1134 } 1135 1136 if (hw.z > 0 && hw.x > 1) { 1137 num_fingers = 1; 1138 finger_width = 5; 1139 if (SYN_CAP_EXTENDED(info->capabilities)) { 1140 switch (hw.w) { 1141 case 0 ... 1: 1142 if (synaptics_has_multifinger(priv)) 1143 num_fingers = hw.w + 2; 1144 break; 1145 case 2: 1146 /* 1147 * SYN_MODEL_PEN(info->model_id): even if 1148 * the device supports pen, we treat it as 1149 * a single finger. 1150 */ 1151 break; 1152 case 4 ... 15: 1153 if (SYN_CAP_PALMDETECT(info->capabilities)) 1154 finger_width = hw.w; 1155 break; 1156 } 1157 } 1158 } else { 1159 num_fingers = 0; 1160 finger_width = 0; 1161 } 1162 1163 if (cr48_profile_sensor) { 1164 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1165 return; 1166 } 1167 1168 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1169 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1170 num_fingers); 1171 1172 /* Post events 1173 * BTN_TOUCH has to be first as mousedev relies on it when doing 1174 * absolute -> relative conversion 1175 */ 1176 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1177 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1178 1179 if (num_fingers > 0) { 1180 input_report_abs(dev, ABS_X, hw.x); 1181 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1182 } 1183 input_report_abs(dev, ABS_PRESSURE, hw.z); 1184 1185 if (SYN_CAP_PALMDETECT(info->capabilities)) 1186 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1187 1188 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1189 if (synaptics_has_multifinger(priv)) { 1190 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1191 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1192 } 1193 1194 synaptics_report_buttons(psmouse, &hw); 1195 1196 input_sync(dev); 1197} 1198 1199static bool synaptics_validate_byte(struct psmouse *psmouse, 1200 int idx, enum synaptics_pkt_type pkt_type) 1201{ 1202 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1203 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1204 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1205 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1206 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1207 const u8 *packet = psmouse->packet; 1208 1209 if (idx < 0 || idx > 4) 1210 return false; 1211 1212 switch (pkt_type) { 1213 1214 case SYN_NEWABS: 1215 case SYN_NEWABS_RELAXED: 1216 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1217 1218 case SYN_NEWABS_STRICT: 1219 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1220 1221 case SYN_OLDABS: 1222 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1223 1224 default: 1225 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1226 return false; 1227 } 1228} 1229 1230static enum synaptics_pkt_type 1231synaptics_detect_pkt_type(struct psmouse *psmouse) 1232{ 1233 int i; 1234 1235 for (i = 0; i < 5; i++) { 1236 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1237 psmouse_info(psmouse, "using relaxed packet validation\n"); 1238 return SYN_NEWABS_RELAXED; 1239 } 1240 } 1241 1242 return SYN_NEWABS_STRICT; 1243} 1244 1245static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1246{ 1247 struct synaptics_data *priv = psmouse->private; 1248 1249 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1250 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1251 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1252 1253 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1254 synaptics_is_pt_packet(psmouse->packet)) { 1255 synaptics_pass_pt_packet(priv, psmouse->packet); 1256 } else { 1257 synaptics_process_packet(psmouse); 1258 } 1259 1260 return PSMOUSE_FULL_PACKET; 1261 } 1262 1263 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1264 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1265} 1266 1267/***************************************************************************** 1268 * Driver initialization/cleanup functions 1269 ****************************************************************************/ 1270static void set_abs_position_params(struct input_dev *dev, 1271 struct synaptics_device_info *info, 1272 int x_code, int y_code) 1273{ 1274 int x_min = info->x_min ?: XMIN_NOMINAL; 1275 int x_max = info->x_max ?: XMAX_NOMINAL; 1276 int y_min = info->y_min ?: YMIN_NOMINAL; 1277 int y_max = info->y_max ?: YMAX_NOMINAL; 1278 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1279 SYN_REDUCED_FILTER_FUZZ : 0; 1280 1281 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1282 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1283 input_abs_set_res(dev, x_code, info->x_res); 1284 input_abs_set_res(dev, y_code, info->y_res); 1285} 1286 1287static int set_input_params(struct psmouse *psmouse, 1288 struct synaptics_data *priv) 1289{ 1290 struct input_dev *dev = psmouse->dev; 1291 struct synaptics_device_info *info = &priv->info; 1292 int i; 1293 int error; 1294 1295 /* Reset default psmouse capabilities */ 1296 __clear_bit(EV_REL, dev->evbit); 1297 bitmap_zero(dev->relbit, REL_CNT); 1298 bitmap_zero(dev->keybit, KEY_CNT); 1299 1300 /* Things that apply to both modes */ 1301 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1302 1303 input_set_capability(dev, EV_KEY, BTN_LEFT); 1304 1305 /* Clickpads report only left button */ 1306 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1307 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1308 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1309 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1310 } 1311 1312 if (!priv->absolute_mode) { 1313 /* Relative mode */ 1314 input_set_capability(dev, EV_REL, REL_X); 1315 input_set_capability(dev, EV_REL, REL_Y); 1316 return 0; 1317 } 1318 1319 /* Absolute mode */ 1320 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1321 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1322 1323 if (cr48_profile_sensor) 1324 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1325 1326 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1327 set_abs_position_params(dev, info, 1328 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1329 /* Image sensors can report per-contact pressure */ 1330 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1331 1332 error = input_mt_init_slots(dev, 2, 1333 INPUT_MT_POINTER | INPUT_MT_TRACK); 1334 if (error) 1335 return error; 1336 1337 /* Image sensors can signal 4 and 5 finger clicks */ 1338 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1339 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1340 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1341 set_abs_position_params(dev, info, 1342 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1343 /* 1344 * Profile sensor in CR-48 tracks contacts reasonably well, 1345 * other non-image sensors with AGM use semi-mt. 1346 */ 1347 error = input_mt_init_slots(dev, 2, 1348 INPUT_MT_POINTER | 1349 (cr48_profile_sensor ? 1350 INPUT_MT_TRACK : 1351 INPUT_MT_SEMI_MT)); 1352 if (error) 1353 return error; 1354 1355 /* 1356 * For semi-mt devices we send ABS_X/Y ourselves instead of 1357 * input_mt_report_pointer_emulation. But 1358 * input_mt_init_slots() resets the fuzz to 0, leading to a 1359 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1360 * position. Let's re-initialize ABS_X/Y here. 1361 */ 1362 if (!cr48_profile_sensor) 1363 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1364 } 1365 1366 if (SYN_CAP_PALMDETECT(info->capabilities)) 1367 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1368 1369 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1370 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1371 1372 if (synaptics_has_multifinger(priv)) { 1373 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1374 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1375 } 1376 1377 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1378 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1379 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1380 input_set_capability(dev, EV_KEY, BTN_BACK); 1381 } 1382 1383 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1384 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1385 input_set_capability(dev, EV_KEY, BTN_0 + i); 1386 1387 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1388 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1389 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1390 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1391 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1392 } 1393 1394 return 0; 1395} 1396 1397static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1398 void *data, char *buf) 1399{ 1400 struct synaptics_data *priv = psmouse->private; 1401 1402 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1403} 1404 1405static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1406 void *data, const char *buf, 1407 size_t len) 1408{ 1409 struct synaptics_data *priv = psmouse->private; 1410 unsigned int value; 1411 int err; 1412 1413 err = kstrtouint(buf, 10, &value); 1414 if (err) 1415 return err; 1416 1417 if (value > 1) 1418 return -EINVAL; 1419 1420 if (value == priv->disable_gesture) 1421 return len; 1422 1423 priv->disable_gesture = value; 1424 if (value) 1425 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1426 else 1427 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1428 1429 if (synaptics_mode_cmd(psmouse, priv->mode)) 1430 return -EIO; 1431 1432 return len; 1433} 1434 1435PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1436 synaptics_show_disable_gesture, 1437 synaptics_set_disable_gesture); 1438 1439static void synaptics_disconnect(struct psmouse *psmouse) 1440{ 1441 struct synaptics_data *priv = psmouse->private; 1442 1443 /* 1444 * We might have left a breadcrumb when trying to 1445 * set up SMbus companion. 1446 */ 1447 psmouse_smbus_cleanup(psmouse); 1448 1449 if (!priv->absolute_mode && 1450 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1451 device_remove_file(&psmouse->ps2dev.serio->dev, 1452 &psmouse_attr_disable_gesture.dattr); 1453 1454 synaptics_reset(psmouse); 1455 kfree(priv); 1456 psmouse->private = NULL; 1457} 1458 1459static int synaptics_reconnect(struct psmouse *psmouse) 1460{ 1461 struct synaptics_data *priv = psmouse->private; 1462 struct synaptics_device_info info; 1463 u8 param[2]; 1464 int retry = 0; 1465 int error; 1466 1467 do { 1468 psmouse_reset(psmouse); 1469 if (retry) { 1470 /* 1471 * On some boxes, right after resuming, the touchpad 1472 * needs some time to finish initializing (I assume 1473 * it needs time to calibrate) and start responding 1474 * to Synaptics-specific queries, so let's wait a 1475 * bit. 1476 */ 1477 ssleep(1); 1478 } 1479 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1480 error = synaptics_detect(psmouse, 0); 1481 } while (error && ++retry < 3); 1482 1483 if (error) 1484 return error; 1485 1486 if (retry > 1) 1487 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1488 1489 error = synaptics_query_hardware(psmouse, &info); 1490 if (error) { 1491 psmouse_err(psmouse, "Unable to query device.\n"); 1492 return error; 1493 } 1494 1495 error = synaptics_set_mode(psmouse); 1496 if (error) { 1497 psmouse_err(psmouse, "Unable to initialize device.\n"); 1498 return error; 1499 } 1500 1501 if (info.identity != priv->info.identity || 1502 info.model_id != priv->info.model_id || 1503 info.capabilities != priv->info.capabilities || 1504 info.ext_cap != priv->info.ext_cap) { 1505 psmouse_err(psmouse, 1506 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1507 priv->info.identity, info.identity, 1508 priv->info.model_id, info.model_id, 1509 priv->info.capabilities, info.capabilities, 1510 priv->info.ext_cap, info.ext_cap); 1511 return -ENXIO; 1512 } 1513 1514 return 0; 1515} 1516 1517static bool impaired_toshiba_kbc; 1518 1519static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1520#if defined(CONFIG_DMI) && defined(CONFIG_X86) 1521 { 1522 /* Toshiba Satellite */ 1523 .matches = { 1524 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1525 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1526 }, 1527 }, 1528 { 1529 /* Toshiba Dynabook */ 1530 .matches = { 1531 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1532 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1533 }, 1534 }, 1535 { 1536 /* Toshiba Portege M300 */ 1537 .matches = { 1538 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1539 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1540 }, 1541 1542 }, 1543 { 1544 /* Toshiba Portege M300 */ 1545 .matches = { 1546 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1547 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1548 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1549 }, 1550 1551 }, 1552#endif 1553 { } 1554}; 1555 1556static bool broken_olpc_ec; 1557 1558static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1559#if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1560 { 1561 /* OLPC XO-1 or XO-1.5 */ 1562 .matches = { 1563 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1564 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1565 }, 1566 }, 1567#endif 1568 { } 1569}; 1570 1571static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1572#if defined(CONFIG_DMI) && defined(CONFIG_X86) 1573 { 1574 /* Cr-48 Chromebook (Codename Mario) */ 1575 .matches = { 1576 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1577 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1578 }, 1579 }, 1580#endif 1581 { } 1582}; 1583 1584void __init synaptics_module_init(void) 1585{ 1586 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1587 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1588 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1589} 1590 1591static int synaptics_init_ps2(struct psmouse *psmouse, 1592 struct synaptics_device_info *info, 1593 bool absolute_mode) 1594{ 1595 struct synaptics_data *priv; 1596 int err; 1597 1598 synaptics_apply_quirks(psmouse, info); 1599 1600 psmouse->private = priv = kzalloc(sizeof(*priv), GFP_KERNEL); 1601 if (!priv) 1602 return -ENOMEM; 1603 1604 priv->info = *info; 1605 priv->absolute_mode = absolute_mode; 1606 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1607 priv->disable_gesture = true; 1608 1609 /* 1610 * Unfortunately ForcePad capability is not exported over PS/2, 1611 * so we have to resort to checking PNP IDs. 1612 */ 1613 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1614 1615 err = synaptics_set_mode(psmouse); 1616 if (err) { 1617 psmouse_err(psmouse, "Unable to initialize device.\n"); 1618 goto init_fail; 1619 } 1620 1621 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1622 SYN_NEWABS : SYN_OLDABS; 1623 1624 psmouse_info(psmouse, 1625 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1626 SYN_ID_MODEL(info->identity), 1627 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1628 info->model_id, 1629 info->capabilities, info->ext_cap, info->ext_cap_0c, 1630 info->ext_cap_10, info->board_id, info->firmware_id); 1631 1632 err = set_input_params(psmouse, priv); 1633 if (err) { 1634 psmouse_err(psmouse, 1635 "failed to set up capabilities: %d\n", err); 1636 goto init_fail; 1637 } 1638 1639 /* 1640 * Encode touchpad model so that it can be used to set 1641 * input device->id.version and be visible to userspace. 1642 * Because version is __u16 we have to drop something. 1643 * Hardware info bits seem to be good candidates as they 1644 * are documented to be for Synaptics corp. internal use. 1645 */ 1646 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1647 (info->model_id & 0x000000ff); 1648 1649 if (absolute_mode) { 1650 psmouse->protocol_handler = synaptics_process_byte; 1651 psmouse->pktsize = 6; 1652 } else { 1653 /* Relative mode follows standard PS/2 mouse protocol */ 1654 psmouse->protocol_handler = psmouse_process_byte; 1655 psmouse->pktsize = 3; 1656 } 1657 1658 psmouse->set_rate = synaptics_set_rate; 1659 psmouse->disconnect = synaptics_disconnect; 1660 psmouse->reconnect = synaptics_reconnect; 1661 psmouse->fast_reconnect = NULL; 1662 psmouse->cleanup = synaptics_reset; 1663 /* Synaptics can usually stay in sync without extra help */ 1664 psmouse->resync_time = 0; 1665 1666 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1667 synaptics_pt_create(psmouse); 1668 1669 /* 1670 * Toshiba's KBC seems to have trouble handling data from 1671 * Synaptics at full rate. Switch to a lower rate (roughly 1672 * the same rate as a standard PS/2 mouse). 1673 */ 1674 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1675 psmouse_info(psmouse, 1676 "Toshiba %s detected, limiting rate to 40pps.\n", 1677 dmi_get_system_info(DMI_PRODUCT_NAME)); 1678 psmouse->rate = 40; 1679 } 1680 1681 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1682 err = device_create_file(&psmouse->ps2dev.serio->dev, 1683 &psmouse_attr_disable_gesture.dattr); 1684 if (err) { 1685 psmouse_err(psmouse, 1686 "Failed to create disable_gesture attribute (%d)", 1687 err); 1688 goto init_fail; 1689 } 1690 } 1691 1692 return 0; 1693 1694 init_fail: 1695 kfree(priv); 1696 return err; 1697} 1698 1699static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1700{ 1701 struct synaptics_device_info info; 1702 int error; 1703 1704 psmouse_reset(psmouse); 1705 1706 error = synaptics_query_hardware(psmouse, &info); 1707 if (error) { 1708 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1709 return error; 1710 } 1711 1712 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1713} 1714 1715int synaptics_init_absolute(struct psmouse *psmouse) 1716{ 1717 return __synaptics_init(psmouse, true); 1718} 1719 1720int synaptics_init_relative(struct psmouse *psmouse) 1721{ 1722 return __synaptics_init(psmouse, false); 1723} 1724 1725static int synaptics_setup_ps2(struct psmouse *psmouse, 1726 struct synaptics_device_info *info) 1727{ 1728 bool absolute_mode = true; 1729 int error; 1730 1731 /* 1732 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1733 * packet spew overloads the EC such that key presses on the keyboard 1734 * are missed. Given that, don't even attempt to use Absolute mode. 1735 * Relative mode seems to work just fine. 1736 */ 1737 if (broken_olpc_ec) { 1738 psmouse_info(psmouse, 1739 "OLPC XO detected, forcing relative protocol.\n"); 1740 absolute_mode = false; 1741 } 1742 1743 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1744 if (error) 1745 return error; 1746 1747 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1748} 1749 1750#else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1751 1752void __init synaptics_module_init(void) 1753{ 1754} 1755 1756static int __maybe_unused 1757synaptics_setup_ps2(struct psmouse *psmouse, 1758 struct synaptics_device_info *info) 1759{ 1760 return -ENOSYS; 1761} 1762 1763#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1764 1765#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1766 1767/* 1768 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1769 * provides a better bandwidth and allow a better control of the touchpads. 1770 * This is used to decide if we need to use this bus or not. 1771 */ 1772enum { 1773 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1774 SYNAPTICS_INTERTOUCH_OFF, 1775 SYNAPTICS_INTERTOUCH_ON, 1776}; 1777 1778static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1779 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1780module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1781MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1782 1783static int synaptics_create_intertouch(struct psmouse *psmouse, 1784 struct synaptics_device_info *info, 1785 bool leave_breadcrumbs) 1786{ 1787 bool topbuttonpad = 1788 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1789 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1790 const struct rmi_device_platform_data pdata = { 1791 .reset_delay_ms = 30, 1792 .sensor_pdata = { 1793 .sensor_type = rmi_sensor_touchpad, 1794 .axis_align.flip_y = true, 1795 .kernel_tracking = false, 1796 .topbuttonpad = topbuttonpad, 1797 }, 1798 .gpio_data = { 1799 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1800 .trackstick_buttons = 1801 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1802 }, 1803 }; 1804 const struct i2c_board_info intertouch_board = { 1805 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1806 .flags = I2C_CLIENT_HOST_NOTIFY, 1807 }; 1808 1809 return psmouse_smbus_init(psmouse, &intertouch_board, 1810 &pdata, sizeof(pdata), true, 1811 leave_breadcrumbs); 1812} 1813 1814/* 1815 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1816 * and decides to instantiate a SMBus InterTouch device. 1817 */ 1818static int synaptics_setup_intertouch(struct psmouse *psmouse, 1819 struct synaptics_device_info *info, 1820 bool leave_breadcrumbs) 1821{ 1822 int error; 1823 1824 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1825 return -ENXIO; 1826 1827 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1828 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1829 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1830 1831 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1832 psmouse_info(psmouse, 1833 "Your touchpad (%s) says it can support a different bus. " 1834 "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", 1835 psmouse->ps2dev.serio->firmware_id); 1836 1837 return -ENXIO; 1838 } 1839 } 1840 1841 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1842 1843 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1844 if (error) { 1845 if (error == -EAGAIN) 1846 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1847 else 1848 psmouse_err(psmouse, "unable to create intertouch device\n"); 1849 1850 return error; 1851 } 1852 1853 return 0; 1854} 1855 1856int synaptics_init_smbus(struct psmouse *psmouse) 1857{ 1858 struct synaptics_device_info info; 1859 int error; 1860 1861 psmouse_reset(psmouse); 1862 1863 error = synaptics_query_hardware(psmouse, &info); 1864 if (error) { 1865 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1866 return error; 1867 } 1868 1869 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1870 return -ENXIO; 1871 1872 return synaptics_create_intertouch(psmouse, &info, false); 1873} 1874 1875#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1876 1877static int __maybe_unused 1878synaptics_setup_intertouch(struct psmouse *psmouse, 1879 struct synaptics_device_info *info, 1880 bool leave_breadcrumbs) 1881{ 1882 return -ENOSYS; 1883} 1884 1885int synaptics_init_smbus(struct psmouse *psmouse) 1886{ 1887 return -ENOSYS; 1888} 1889 1890#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1891 1892#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1893 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1894 1895int synaptics_init(struct psmouse *psmouse) 1896{ 1897 struct synaptics_device_info info; 1898 int error; 1899 int retval; 1900 1901 psmouse_reset(psmouse); 1902 1903 error = synaptics_query_hardware(psmouse, &info); 1904 if (error) { 1905 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1906 return error; 1907 } 1908 1909 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1910 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1911 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1912 /* Forcepads need F21, which is not ready */ 1913 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1914 psmouse_warn(psmouse, 1915 "The touchpad can support a better bus than the too old PS/2 protocol. " 1916 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1917 } 1918 1919 error = synaptics_setup_intertouch(psmouse, &info, true); 1920 if (!error) 1921 return PSMOUSE_SYNAPTICS_SMBUS; 1922 } 1923 1924 retval = synaptics_setup_ps2(psmouse, &info); 1925 if (retval < 0) { 1926 /* 1927 * Not using any flavor of Synaptics support, so clean up 1928 * SMbus breadcrumbs, if any. 1929 */ 1930 psmouse_smbus_cleanup(psmouse); 1931 } 1932 1933 return retval; 1934} 1935 1936#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1937 1938int synaptics_init(struct psmouse *psmouse) 1939{ 1940 return -ENOSYS; 1941} 1942 1943#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */
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