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 164static const char * const smbus_pnp_ids[] = { 165 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */ 166 "LEN0048", /* X1 Carbon 3 */ 167 "LEN0046", /* X250 */ 168 "LEN0049", /* Yoga 11e */ 169 "LEN004a", /* W541 */ 170 "LEN005b", /* P50 */ 171 "LEN005e", /* T560 */ 172 "LEN006c", /* T470s */ 173 "LEN007a", /* T470s */ 174 "LEN0071", /* T480 */ 175 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 176 "LEN0073", /* X1 Carbon G5 (Elantech) */ 177 "LEN0091", /* X1 Carbon 6 */ 178 "LEN0092", /* X1 Carbon 6 */ 179 "LEN0093", /* T480 */ 180 "LEN0096", /* X280 */ 181 "LEN0097", /* X280 -> ALPS trackpoint */ 182 "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */ 183 "LEN009b", /* T580 */ 184 "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */ 185 "LEN200f", /* T450s */ 186 "LEN2044", /* L470 */ 187 "LEN2054", /* E480 */ 188 "LEN2055", /* E580 */ 189 "LEN2068", /* T14 Gen 1 */ 190 "SYN3052", /* HP EliteBook 840 G4 */ 191 "SYN3221", /* HP 15-ay000 */ 192 "SYN323d", /* HP Spectre X360 13-w013dx */ 193 "SYN3257", /* HP Envy 13-ad105ng */ 194 NULL 195}; 196 197static const char * const forcepad_pnp_ids[] = { 198 "SYN300D", 199 "SYN3014", 200 NULL 201}; 202 203/* 204 * Send a command to the synaptics touchpad by special commands 205 */ 206static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 207{ 208 int error; 209 210 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 211 if (error) 212 return error; 213 214 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 215 if (error) 216 return error; 217 218 return 0; 219} 220 221static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 222{ 223 int error; 224 union { 225 __be32 be_val; 226 char buf[4]; 227 } resp = { 0 }; 228 229 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 230 if (error) 231 return error; 232 233 *val = be32_to_cpu(resp.be_val); 234 return 0; 235} 236 237/* 238 * Identify Touchpad 239 * See also the SYN_ID_* macros 240 */ 241static int synaptics_identify(struct psmouse *psmouse, 242 struct synaptics_device_info *info) 243{ 244 int error; 245 246 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 247 if (error) 248 return error; 249 250 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 251} 252 253/* 254 * Read the model-id bytes from the touchpad 255 * see also SYN_MODEL_* macros 256 */ 257static int synaptics_model_id(struct psmouse *psmouse, 258 struct synaptics_device_info *info) 259{ 260 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 261} 262 263/* 264 * Read the firmware id from the touchpad 265 */ 266static int synaptics_firmware_id(struct psmouse *psmouse, 267 struct synaptics_device_info *info) 268{ 269 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 270 &info->firmware_id); 271} 272 273/* 274 * Read the board id and the "More Extended Queries" from the touchpad 275 * The board id is encoded in the "QUERY MODES" response 276 */ 277static int synaptics_query_modes(struct psmouse *psmouse, 278 struct synaptics_device_info *info) 279{ 280 u8 bid[3]; 281 int error; 282 283 /* firmwares prior 7.5 have no board_id encoded */ 284 if (SYN_ID_FULL(info->identity) < 0x705) 285 return 0; 286 287 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 288 if (error) 289 return error; 290 291 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 292 293 if (SYN_MEXT_CAP_BIT(bid[0])) 294 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 295 &info->ext_cap_10); 296 297 return 0; 298} 299 300/* 301 * Read the capability-bits from the touchpad 302 * see also the SYN_CAP_* macros 303 */ 304static int synaptics_capability(struct psmouse *psmouse, 305 struct synaptics_device_info *info) 306{ 307 int error; 308 309 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 310 &info->capabilities); 311 if (error) 312 return error; 313 314 info->ext_cap = info->ext_cap_0c = 0; 315 316 /* 317 * Older firmwares had submodel ID fixed to 0x47 318 */ 319 if (SYN_ID_FULL(info->identity) < 0x705 && 320 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 321 return -ENXIO; 322 } 323 324 /* 325 * Unless capExtended is set the rest of the flags should be ignored 326 */ 327 if (!SYN_CAP_EXTENDED(info->capabilities)) 328 info->capabilities = 0; 329 330 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 331 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 332 &info->ext_cap); 333 if (error) { 334 psmouse_warn(psmouse, 335 "device claims to have extended capabilities, but I'm not able to read them.\n"); 336 } else { 337 /* 338 * if nExtBtn is greater than 8 it should be considered 339 * invalid and treated as 0 340 */ 341 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 342 info->ext_cap &= ~SYN_CAP_MB_MASK; 343 } 344 } 345 346 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 347 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 348 &info->ext_cap_0c); 349 if (error) 350 psmouse_warn(psmouse, 351 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 352 } 353 354 return 0; 355} 356 357/* 358 * Read touchpad resolution and maximum reported coordinates 359 * Resolution is left zero if touchpad does not support the query 360 */ 361static int synaptics_resolution(struct psmouse *psmouse, 362 struct synaptics_device_info *info) 363{ 364 u8 resp[3]; 365 int error; 366 367 if (SYN_ID_MAJOR(info->identity) < 4) 368 return 0; 369 370 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 371 if (!error) { 372 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 373 info->x_res = resp[0]; /* x resolution in units/mm */ 374 info->y_res = resp[2]; /* y resolution in units/mm */ 375 } 376 } 377 378 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 379 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 380 error = synaptics_send_cmd(psmouse, 381 SYN_QUE_EXT_MAX_COORDS, resp); 382 if (error) { 383 psmouse_warn(psmouse, 384 "device claims to have max coordinates query, but I'm not able to read it.\n"); 385 } else { 386 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 387 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 388 psmouse_info(psmouse, 389 "queried max coordinates: x [..%d], y [..%d]\n", 390 info->x_max, info->y_max); 391 } 392 } 393 394 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 395 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 396 /* 397 * Firmware v8.1 does not report proper number of extended 398 * capabilities, but has been proven to report correct min 399 * coordinates. 400 */ 401 SYN_ID_FULL(info->identity) == 0x801)) { 402 error = synaptics_send_cmd(psmouse, 403 SYN_QUE_EXT_MIN_COORDS, resp); 404 if (error) { 405 psmouse_warn(psmouse, 406 "device claims to have min coordinates query, but I'm not able to read it.\n"); 407 } else { 408 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 409 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 410 psmouse_info(psmouse, 411 "queried min coordinates: x [%d..], y [%d..]\n", 412 info->x_min, info->y_min); 413 } 414 } 415 416 return 0; 417} 418 419static int synaptics_query_hardware(struct psmouse *psmouse, 420 struct synaptics_device_info *info) 421{ 422 int error; 423 424 memset(info, 0, sizeof(*info)); 425 426 error = synaptics_identify(psmouse, info); 427 if (error) 428 return error; 429 430 error = synaptics_model_id(psmouse, info); 431 if (error) 432 return error; 433 434 error = synaptics_firmware_id(psmouse, info); 435 if (error) 436 return error; 437 438 error = synaptics_query_modes(psmouse, info); 439 if (error) 440 return error; 441 442 error = synaptics_capability(psmouse, info); 443 if (error) 444 return error; 445 446 error = synaptics_resolution(psmouse, info); 447 if (error) 448 return error; 449 450 return 0; 451} 452 453#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 454 455#ifdef CONFIG_MOUSE_PS2_SYNAPTICS 456 457static bool cr48_profile_sensor; 458 459#define ANY_BOARD_ID 0 460struct min_max_quirk { 461 const char * const *pnp_ids; 462 struct { 463 u32 min, max; 464 } board_id; 465 u32 x_min, x_max, y_min, y_max; 466}; 467 468static const struct min_max_quirk min_max_pnpid_table[] = { 469 { 470 (const char * const []){"LEN0033", NULL}, 471 {ANY_BOARD_ID, ANY_BOARD_ID}, 472 1024, 5052, 2258, 4832 473 }, 474 { 475 (const char * const []){"LEN0042", NULL}, 476 {ANY_BOARD_ID, ANY_BOARD_ID}, 477 1232, 5710, 1156, 4696 478 }, 479 { 480 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 481 "LEN0039", "LEN2002", "LEN2004", 482 NULL}, 483 {ANY_BOARD_ID, 2961}, 484 1024, 5112, 2024, 4832 485 }, 486 { 487 (const char * const []){"LEN2000", NULL}, 488 {ANY_BOARD_ID, ANY_BOARD_ID}, 489 1024, 5113, 2021, 4832 490 }, 491 { 492 (const char * const []){"LEN2001", NULL}, 493 {ANY_BOARD_ID, ANY_BOARD_ID}, 494 1024, 5022, 2508, 4832 495 }, 496 { 497 (const char * const []){"LEN2006", NULL}, 498 {2691, 2691}, 499 1024, 5045, 2457, 4832 500 }, 501 { 502 (const char * const []){"LEN2006", NULL}, 503 {ANY_BOARD_ID, ANY_BOARD_ID}, 504 1264, 5675, 1171, 4688 505 }, 506 { } 507}; 508 509/***************************************************************************** 510 * Synaptics communications functions 511 ****************************************************************************/ 512 513/* 514 * Synaptics touchpads report the y coordinate from bottom to top, which is 515 * opposite from what userspace expects. 516 * This function is used to invert y before reporting. 517 */ 518static int synaptics_invert_y(int y) 519{ 520 return YMAX_NOMINAL + YMIN_NOMINAL - y; 521} 522 523/* 524 * Apply quirk(s) if the hardware matches 525 */ 526static void synaptics_apply_quirks(struct psmouse *psmouse, 527 struct synaptics_device_info *info) 528{ 529 int i; 530 531 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 532 if (!psmouse_matches_pnp_id(psmouse, 533 min_max_pnpid_table[i].pnp_ids)) 534 continue; 535 536 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 537 info->board_id < min_max_pnpid_table[i].board_id.min) 538 continue; 539 540 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 541 info->board_id > min_max_pnpid_table[i].board_id.max) 542 continue; 543 544 info->x_min = min_max_pnpid_table[i].x_min; 545 info->x_max = min_max_pnpid_table[i].x_max; 546 info->y_min = min_max_pnpid_table[i].y_min; 547 info->y_max = min_max_pnpid_table[i].y_max; 548 psmouse_info(psmouse, 549 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 550 info->x_min, info->x_max, 551 info->y_min, info->y_max); 552 break; 553 } 554} 555 556static bool synaptics_has_agm(struct synaptics_data *priv) 557{ 558 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 559 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 560} 561 562static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 563{ 564 static u8 param = 0xc8; 565 int error; 566 567 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 568 if (error) 569 return error; 570 571 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 572 if (error) 573 return error; 574 575 return 0; 576} 577 578static int synaptics_set_mode(struct psmouse *psmouse) 579{ 580 struct synaptics_data *priv = psmouse->private; 581 int error; 582 583 priv->mode = 0; 584 if (priv->absolute_mode) 585 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 586 if (priv->disable_gesture) 587 priv->mode |= SYN_BIT_DISABLE_GESTURE; 588 if (psmouse->rate >= 80) 589 priv->mode |= SYN_BIT_HIGH_RATE; 590 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 591 priv->mode |= SYN_BIT_W_MODE; 592 593 error = synaptics_mode_cmd(psmouse, priv->mode); 594 if (error) 595 return error; 596 597 if (priv->absolute_mode && synaptics_has_agm(priv)) { 598 error = synaptics_set_advanced_gesture_mode(psmouse); 599 if (error) { 600 psmouse_err(psmouse, 601 "Advanced gesture mode init failed: %d\n", 602 error); 603 return error; 604 } 605 } 606 607 return 0; 608} 609 610static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 611{ 612 struct synaptics_data *priv = psmouse->private; 613 614 if (rate >= 80) { 615 priv->mode |= SYN_BIT_HIGH_RATE; 616 psmouse->rate = 80; 617 } else { 618 priv->mode &= ~SYN_BIT_HIGH_RATE; 619 psmouse->rate = 40; 620 } 621 622 synaptics_mode_cmd(psmouse, priv->mode); 623} 624 625/***************************************************************************** 626 * Synaptics pass-through PS/2 port support 627 ****************************************************************************/ 628static int synaptics_pt_write(struct serio *serio, u8 c) 629{ 630 struct psmouse *parent = serio_get_drvdata(serio->parent); 631 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 632 int error; 633 634 error = ps2_sliced_command(&parent->ps2dev, c); 635 if (error) 636 return error; 637 638 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 639 if (error) 640 return error; 641 642 return 0; 643} 644 645static int synaptics_pt_start(struct serio *serio) 646{ 647 struct psmouse *parent = serio_get_drvdata(serio->parent); 648 struct synaptics_data *priv = parent->private; 649 650 serio_pause_rx(parent->ps2dev.serio); 651 priv->pt_port = serio; 652 serio_continue_rx(parent->ps2dev.serio); 653 654 return 0; 655} 656 657static void synaptics_pt_stop(struct serio *serio) 658{ 659 struct psmouse *parent = serio_get_drvdata(serio->parent); 660 struct synaptics_data *priv = parent->private; 661 662 serio_pause_rx(parent->ps2dev.serio); 663 priv->pt_port = NULL; 664 serio_continue_rx(parent->ps2dev.serio); 665} 666 667static int synaptics_is_pt_packet(u8 *buf) 668{ 669 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 670} 671 672static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet) 673{ 674 struct psmouse *child = serio_get_drvdata(ptport); 675 676 if (child && child->state == PSMOUSE_ACTIVATED) { 677 serio_interrupt(ptport, packet[1], 0); 678 serio_interrupt(ptport, packet[4], 0); 679 serio_interrupt(ptport, packet[5], 0); 680 if (child->pktsize == 4) 681 serio_interrupt(ptport, packet[2], 0); 682 } else { 683 serio_interrupt(ptport, packet[1], 0); 684 } 685} 686 687static void synaptics_pt_activate(struct psmouse *psmouse) 688{ 689 struct synaptics_data *priv = psmouse->private; 690 struct psmouse *child = serio_get_drvdata(priv->pt_port); 691 692 /* adjust the touchpad to child's choice of protocol */ 693 if (child) { 694 if (child->pktsize == 4) 695 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 696 else 697 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 698 699 if (synaptics_mode_cmd(psmouse, priv->mode)) 700 psmouse_warn(psmouse, 701 "failed to switch guest protocol\n"); 702 } 703} 704 705static void synaptics_pt_create(struct psmouse *psmouse) 706{ 707 struct serio *serio; 708 709 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 710 if (!serio) { 711 psmouse_err(psmouse, 712 "not enough memory for pass-through port\n"); 713 return; 714 } 715 716 serio->id.type = SERIO_PS_PSTHRU; 717 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 718 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 719 serio->write = synaptics_pt_write; 720 serio->start = synaptics_pt_start; 721 serio->stop = synaptics_pt_stop; 722 serio->parent = psmouse->ps2dev.serio; 723 724 psmouse->pt_activate = synaptics_pt_activate; 725 726 psmouse_info(psmouse, "serio: %s port at %s\n", 727 serio->name, psmouse->phys); 728 serio_register_port(serio); 729} 730 731/***************************************************************************** 732 * Functions to interpret the absolute mode packets 733 ****************************************************************************/ 734 735static void synaptics_parse_agm(const u8 buf[], 736 struct synaptics_data *priv, 737 struct synaptics_hw_state *hw) 738{ 739 struct synaptics_hw_state *agm = &priv->agm; 740 int agm_packet_type; 741 742 agm_packet_type = (buf[5] & 0x30) >> 4; 743 switch (agm_packet_type) { 744 case 1: 745 /* Gesture packet: (x, y, z) half resolution */ 746 agm->w = hw->w; 747 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 748 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 749 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 750 break; 751 752 case 2: 753 /* AGM-CONTACT packet: we are only interested in the count */ 754 priv->agm_count = buf[1]; 755 break; 756 757 default: 758 break; 759 } 760} 761 762static void synaptics_parse_ext_buttons(const u8 buf[], 763 struct synaptics_data *priv, 764 struct synaptics_hw_state *hw) 765{ 766 unsigned int ext_bits = 767 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 768 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 769 770 hw->ext_buttons = buf[4] & ext_mask; 771 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 772} 773 774static int synaptics_parse_hw_state(const u8 buf[], 775 struct synaptics_data *priv, 776 struct synaptics_hw_state *hw) 777{ 778 memset(hw, 0, sizeof(struct synaptics_hw_state)); 779 780 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 781 hw->w = (((buf[0] & 0x30) >> 2) | 782 ((buf[0] & 0x04) >> 1) | 783 ((buf[3] & 0x04) >> 2)); 784 785 if (synaptics_has_agm(priv) && hw->w == 2) { 786 synaptics_parse_agm(buf, priv, hw); 787 return 1; 788 } 789 790 hw->x = (((buf[3] & 0x10) << 8) | 791 ((buf[1] & 0x0f) << 8) | 792 buf[4]); 793 hw->y = (((buf[3] & 0x20) << 7) | 794 ((buf[1] & 0xf0) << 4) | 795 buf[5]); 796 hw->z = buf[2]; 797 798 hw->left = (buf[0] & 0x01) ? 1 : 0; 799 hw->right = (buf[0] & 0x02) ? 1 : 0; 800 801 if (priv->is_forcepad) { 802 /* 803 * ForcePads, like Clickpads, use middle button 804 * bits to report primary button clicks. 805 * Unfortunately they report primary button not 806 * only when user presses on the pad above certain 807 * threshold, but also when there are more than one 808 * finger on the touchpad, which interferes with 809 * out multi-finger gestures. 810 */ 811 if (hw->z == 0) { 812 /* No contacts */ 813 priv->press = priv->report_press = false; 814 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 815 /* 816 * Single-finger touch with pressure above 817 * the threshold. If pressure stays long 818 * enough, we'll start reporting primary 819 * button. We rely on the device continuing 820 * sending data even if finger does not 821 * move. 822 */ 823 if (!priv->press) { 824 priv->press_start = jiffies; 825 priv->press = true; 826 } else if (time_after(jiffies, 827 priv->press_start + 828 msecs_to_jiffies(50))) { 829 priv->report_press = true; 830 } 831 } else { 832 priv->press = false; 833 } 834 835 hw->left = priv->report_press; 836 837 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 838 /* 839 * Clickpad's button is transmitted as middle button, 840 * however, since it is primary button, we will report 841 * it as BTN_LEFT. 842 */ 843 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 844 845 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 846 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 847 if (hw->w == 2) 848 hw->scroll = (s8)buf[1]; 849 } 850 851 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 852 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 853 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 854 } 855 856 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 857 ((buf[0] ^ buf[3]) & 0x02)) { 858 synaptics_parse_ext_buttons(buf, priv, hw); 859 } 860 } else { 861 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 862 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 863 864 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 865 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 866 867 hw->left = (buf[0] & 0x01) ? 1 : 0; 868 hw->right = (buf[0] & 0x02) ? 1 : 0; 869 } 870 871 /* 872 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 873 * is used by some firmware to indicate a finger at the edge of 874 * the touchpad whose precise position cannot be determined, so 875 * convert these values to the maximum axis value. 876 */ 877 if (hw->x > X_MAX_POSITIVE) 878 hw->x -= 1 << ABS_POS_BITS; 879 else if (hw->x == X_MAX_POSITIVE) 880 hw->x = XMAX; 881 882 if (hw->y > Y_MAX_POSITIVE) 883 hw->y -= 1 << ABS_POS_BITS; 884 else if (hw->y == Y_MAX_POSITIVE) 885 hw->y = YMAX; 886 887 return 0; 888} 889 890static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 891 bool active, int x, int y) 892{ 893 input_mt_slot(dev, slot); 894 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 895 if (active) { 896 input_report_abs(dev, ABS_MT_POSITION_X, x); 897 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 898 } 899} 900 901static void synaptics_report_semi_mt_data(struct input_dev *dev, 902 const struct synaptics_hw_state *a, 903 const struct synaptics_hw_state *b, 904 int num_fingers) 905{ 906 if (num_fingers >= 2) { 907 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 908 min(a->y, b->y)); 909 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 910 max(a->y, b->y)); 911 } else if (num_fingers == 1) { 912 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 913 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 914 } else { 915 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 916 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 917 } 918} 919 920static void synaptics_report_ext_buttons(struct psmouse *psmouse, 921 const struct synaptics_hw_state *hw) 922{ 923 struct input_dev *dev = psmouse->dev; 924 struct synaptics_data *priv = psmouse->private; 925 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 926 int i; 927 928 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 929 return; 930 931 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 932 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 933 SYN_ID_FULL(priv->info.identity) == 0x802) && 934 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 935 return; 936 937 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 938 for (i = 0; i < ext_bits; i++) { 939 input_report_key(dev, BTN_0 + 2 * i, 940 hw->ext_buttons & BIT(i)); 941 input_report_key(dev, BTN_1 + 2 * i, 942 hw->ext_buttons & BIT(i + ext_bits)); 943 } 944 return; 945 } 946 947 /* 948 * This generation of touchpads has the trackstick buttons 949 * physically wired to the touchpad. Re-route them through 950 * the pass-through interface. 951 */ 952 if (priv->pt_port) { 953 u8 pt_buttons; 954 955 /* The trackstick expects at most 3 buttons */ 956 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 957 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 958 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 959 960 serio_interrupt(priv->pt_port, 961 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 962 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 963 } 964} 965 966static void synaptics_report_buttons(struct psmouse *psmouse, 967 const struct synaptics_hw_state *hw) 968{ 969 struct input_dev *dev = psmouse->dev; 970 struct synaptics_data *priv = psmouse->private; 971 972 input_report_key(dev, BTN_LEFT, hw->left); 973 input_report_key(dev, BTN_RIGHT, hw->right); 974 975 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 976 input_report_key(dev, BTN_MIDDLE, hw->middle); 977 978 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 979 input_report_key(dev, BTN_FORWARD, hw->up); 980 input_report_key(dev, BTN_BACK, hw->down); 981 } 982 983 synaptics_report_ext_buttons(psmouse, hw); 984} 985 986static void synaptics_report_mt_data(struct psmouse *psmouse, 987 const struct synaptics_hw_state *sgm, 988 int num_fingers) 989{ 990 struct input_dev *dev = psmouse->dev; 991 struct synaptics_data *priv = psmouse->private; 992 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 993 struct input_mt_pos pos[2]; 994 int slot[2], nsemi, i; 995 996 nsemi = clamp_val(num_fingers, 0, 2); 997 998 for (i = 0; i < nsemi; i++) { 999 pos[i].x = hw[i]->x; 1000 pos[i].y = synaptics_invert_y(hw[i]->y); 1001 } 1002 1003 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 1004 1005 for (i = 0; i < nsemi; i++) { 1006 input_mt_slot(dev, slot[i]); 1007 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1008 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1009 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1010 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1011 } 1012 1013 input_mt_drop_unused(dev); 1014 1015 /* Don't use active slot count to generate BTN_TOOL events. */ 1016 input_mt_report_pointer_emulation(dev, false); 1017 1018 /* Send the number of fingers reported by touchpad itself. */ 1019 input_mt_report_finger_count(dev, num_fingers); 1020 1021 synaptics_report_buttons(psmouse, sgm); 1022 1023 input_sync(dev); 1024} 1025 1026static void synaptics_image_sensor_process(struct psmouse *psmouse, 1027 struct synaptics_hw_state *sgm) 1028{ 1029 struct synaptics_data *priv = psmouse->private; 1030 int num_fingers; 1031 1032 /* 1033 * Update mt_state using the new finger count and current mt_state. 1034 */ 1035 if (sgm->z == 0) 1036 num_fingers = 0; 1037 else if (sgm->w >= 4) 1038 num_fingers = 1; 1039 else if (sgm->w == 0) 1040 num_fingers = 2; 1041 else if (sgm->w == 1) 1042 num_fingers = priv->agm_count ? priv->agm_count : 3; 1043 else 1044 num_fingers = 4; 1045 1046 /* Send resulting input events to user space */ 1047 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1048} 1049 1050static bool synaptics_has_multifinger(struct synaptics_data *priv) 1051{ 1052 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1053 return true; 1054 1055 /* Advanced gesture mode also sends multi finger data */ 1056 return synaptics_has_agm(priv); 1057} 1058 1059/* 1060 * called for each full received packet from the touchpad 1061 */ 1062static void synaptics_process_packet(struct psmouse *psmouse) 1063{ 1064 struct input_dev *dev = psmouse->dev; 1065 struct synaptics_data *priv = psmouse->private; 1066 struct synaptics_device_info *info = &priv->info; 1067 struct synaptics_hw_state hw; 1068 int num_fingers; 1069 int finger_width; 1070 1071 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1072 return; 1073 1074 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1075 synaptics_image_sensor_process(psmouse, &hw); 1076 return; 1077 } 1078 1079 if (hw.scroll) { 1080 priv->scroll += hw.scroll; 1081 1082 while (priv->scroll >= 4) { 1083 input_report_key(dev, BTN_BACK, !hw.down); 1084 input_sync(dev); 1085 input_report_key(dev, BTN_BACK, hw.down); 1086 input_sync(dev); 1087 priv->scroll -= 4; 1088 } 1089 while (priv->scroll <= -4) { 1090 input_report_key(dev, BTN_FORWARD, !hw.up); 1091 input_sync(dev); 1092 input_report_key(dev, BTN_FORWARD, hw.up); 1093 input_sync(dev); 1094 priv->scroll += 4; 1095 } 1096 return; 1097 } 1098 1099 if (hw.z > 0 && hw.x > 1) { 1100 num_fingers = 1; 1101 finger_width = 5; 1102 if (SYN_CAP_EXTENDED(info->capabilities)) { 1103 switch (hw.w) { 1104 case 0 ... 1: 1105 if (synaptics_has_multifinger(priv)) 1106 num_fingers = hw.w + 2; 1107 break; 1108 case 2: 1109 if (SYN_MODEL_PEN(info->model_id)) 1110 ; /* Nothing, treat a pen as a single finger */ 1111 break; 1112 case 4 ... 15: 1113 if (SYN_CAP_PALMDETECT(info->capabilities)) 1114 finger_width = hw.w; 1115 break; 1116 } 1117 } 1118 } else { 1119 num_fingers = 0; 1120 finger_width = 0; 1121 } 1122 1123 if (cr48_profile_sensor) { 1124 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1125 return; 1126 } 1127 1128 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1129 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1130 num_fingers); 1131 1132 /* Post events 1133 * BTN_TOUCH has to be first as mousedev relies on it when doing 1134 * absolute -> relative conversion 1135 */ 1136 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1137 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1138 1139 if (num_fingers > 0) { 1140 input_report_abs(dev, ABS_X, hw.x); 1141 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1142 } 1143 input_report_abs(dev, ABS_PRESSURE, hw.z); 1144 1145 if (SYN_CAP_PALMDETECT(info->capabilities)) 1146 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1147 1148 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1149 if (synaptics_has_multifinger(priv)) { 1150 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1151 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1152 } 1153 1154 synaptics_report_buttons(psmouse, &hw); 1155 1156 input_sync(dev); 1157} 1158 1159static bool synaptics_validate_byte(struct psmouse *psmouse, 1160 int idx, enum synaptics_pkt_type pkt_type) 1161{ 1162 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1163 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1164 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1165 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1166 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1167 const u8 *packet = psmouse->packet; 1168 1169 if (idx < 0 || idx > 4) 1170 return false; 1171 1172 switch (pkt_type) { 1173 1174 case SYN_NEWABS: 1175 case SYN_NEWABS_RELAXED: 1176 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1177 1178 case SYN_NEWABS_STRICT: 1179 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1180 1181 case SYN_OLDABS: 1182 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1183 1184 default: 1185 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1186 return false; 1187 } 1188} 1189 1190static enum synaptics_pkt_type 1191synaptics_detect_pkt_type(struct psmouse *psmouse) 1192{ 1193 int i; 1194 1195 for (i = 0; i < 5; i++) { 1196 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1197 psmouse_info(psmouse, "using relaxed packet validation\n"); 1198 return SYN_NEWABS_RELAXED; 1199 } 1200 } 1201 1202 return SYN_NEWABS_STRICT; 1203} 1204 1205static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1206{ 1207 struct synaptics_data *priv = psmouse->private; 1208 1209 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1210 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1211 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1212 1213 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1214 synaptics_is_pt_packet(psmouse->packet)) { 1215 if (priv->pt_port) 1216 synaptics_pass_pt_packet(priv->pt_port, 1217 psmouse->packet); 1218 } else 1219 synaptics_process_packet(psmouse); 1220 1221 return PSMOUSE_FULL_PACKET; 1222 } 1223 1224 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1225 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1226} 1227 1228/***************************************************************************** 1229 * Driver initialization/cleanup functions 1230 ****************************************************************************/ 1231static void set_abs_position_params(struct input_dev *dev, 1232 struct synaptics_device_info *info, 1233 int x_code, int y_code) 1234{ 1235 int x_min = info->x_min ?: XMIN_NOMINAL; 1236 int x_max = info->x_max ?: XMAX_NOMINAL; 1237 int y_min = info->y_min ?: YMIN_NOMINAL; 1238 int y_max = info->y_max ?: YMAX_NOMINAL; 1239 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1240 SYN_REDUCED_FILTER_FUZZ : 0; 1241 1242 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1243 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1244 input_abs_set_res(dev, x_code, info->x_res); 1245 input_abs_set_res(dev, y_code, info->y_res); 1246} 1247 1248static int set_input_params(struct psmouse *psmouse, 1249 struct synaptics_data *priv) 1250{ 1251 struct input_dev *dev = psmouse->dev; 1252 struct synaptics_device_info *info = &priv->info; 1253 int i; 1254 int error; 1255 1256 /* Reset default psmouse capabilities */ 1257 __clear_bit(EV_REL, dev->evbit); 1258 bitmap_zero(dev->relbit, REL_CNT); 1259 bitmap_zero(dev->keybit, KEY_CNT); 1260 1261 /* Things that apply to both modes */ 1262 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1263 1264 input_set_capability(dev, EV_KEY, BTN_LEFT); 1265 1266 /* Clickpads report only left button */ 1267 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1268 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1269 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1270 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1271 } 1272 1273 if (!priv->absolute_mode) { 1274 /* Relative mode */ 1275 input_set_capability(dev, EV_REL, REL_X); 1276 input_set_capability(dev, EV_REL, REL_Y); 1277 return 0; 1278 } 1279 1280 /* Absolute mode */ 1281 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1282 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1283 1284 if (cr48_profile_sensor) 1285 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1286 1287 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1288 set_abs_position_params(dev, info, 1289 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1290 /* Image sensors can report per-contact pressure */ 1291 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1292 1293 error = input_mt_init_slots(dev, 2, 1294 INPUT_MT_POINTER | INPUT_MT_TRACK); 1295 if (error) 1296 return error; 1297 1298 /* Image sensors can signal 4 and 5 finger clicks */ 1299 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1300 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1301 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1302 set_abs_position_params(dev, info, 1303 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1304 /* 1305 * Profile sensor in CR-48 tracks contacts reasonably well, 1306 * other non-image sensors with AGM use semi-mt. 1307 */ 1308 error = input_mt_init_slots(dev, 2, 1309 INPUT_MT_POINTER | 1310 (cr48_profile_sensor ? 1311 INPUT_MT_TRACK : 1312 INPUT_MT_SEMI_MT)); 1313 if (error) 1314 return error; 1315 1316 /* 1317 * For semi-mt devices we send ABS_X/Y ourselves instead of 1318 * input_mt_report_pointer_emulation. But 1319 * input_mt_init_slots() resets the fuzz to 0, leading to a 1320 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1321 * position. Let's re-initialize ABS_X/Y here. 1322 */ 1323 if (!cr48_profile_sensor) 1324 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1325 } 1326 1327 if (SYN_CAP_PALMDETECT(info->capabilities)) 1328 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1329 1330 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1331 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1332 1333 if (synaptics_has_multifinger(priv)) { 1334 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1335 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1336 } 1337 1338 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1339 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1340 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1341 input_set_capability(dev, EV_KEY, BTN_BACK); 1342 } 1343 1344 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1345 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1346 input_set_capability(dev, EV_KEY, BTN_0 + i); 1347 1348 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1349 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1350 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1351 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1352 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1353 } 1354 1355 return 0; 1356} 1357 1358static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1359 void *data, char *buf) 1360{ 1361 struct synaptics_data *priv = psmouse->private; 1362 1363 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1364} 1365 1366static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1367 void *data, const char *buf, 1368 size_t len) 1369{ 1370 struct synaptics_data *priv = psmouse->private; 1371 unsigned int value; 1372 int err; 1373 1374 err = kstrtouint(buf, 10, &value); 1375 if (err) 1376 return err; 1377 1378 if (value > 1) 1379 return -EINVAL; 1380 1381 if (value == priv->disable_gesture) 1382 return len; 1383 1384 priv->disable_gesture = value; 1385 if (value) 1386 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1387 else 1388 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1389 1390 if (synaptics_mode_cmd(psmouse, priv->mode)) 1391 return -EIO; 1392 1393 return len; 1394} 1395 1396PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1397 synaptics_show_disable_gesture, 1398 synaptics_set_disable_gesture); 1399 1400static void synaptics_disconnect(struct psmouse *psmouse) 1401{ 1402 struct synaptics_data *priv = psmouse->private; 1403 1404 /* 1405 * We might have left a breadcrumb when trying to 1406 * set up SMbus companion. 1407 */ 1408 psmouse_smbus_cleanup(psmouse); 1409 1410 if (!priv->absolute_mode && 1411 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1412 device_remove_file(&psmouse->ps2dev.serio->dev, 1413 &psmouse_attr_disable_gesture.dattr); 1414 1415 synaptics_reset(psmouse); 1416 kfree(priv); 1417 psmouse->private = NULL; 1418} 1419 1420static int synaptics_reconnect(struct psmouse *psmouse) 1421{ 1422 struct synaptics_data *priv = psmouse->private; 1423 struct synaptics_device_info info; 1424 u8 param[2]; 1425 int retry = 0; 1426 int error; 1427 1428 do { 1429 psmouse_reset(psmouse); 1430 if (retry) { 1431 /* 1432 * On some boxes, right after resuming, the touchpad 1433 * needs some time to finish initializing (I assume 1434 * it needs time to calibrate) and start responding 1435 * to Synaptics-specific queries, so let's wait a 1436 * bit. 1437 */ 1438 ssleep(1); 1439 } 1440 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1441 error = synaptics_detect(psmouse, 0); 1442 } while (error && ++retry < 3); 1443 1444 if (error) 1445 return error; 1446 1447 if (retry > 1) 1448 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1449 1450 error = synaptics_query_hardware(psmouse, &info); 1451 if (error) { 1452 psmouse_err(psmouse, "Unable to query device.\n"); 1453 return error; 1454 } 1455 1456 error = synaptics_set_mode(psmouse); 1457 if (error) { 1458 psmouse_err(psmouse, "Unable to initialize device.\n"); 1459 return error; 1460 } 1461 1462 if (info.identity != priv->info.identity || 1463 info.model_id != priv->info.model_id || 1464 info.capabilities != priv->info.capabilities || 1465 info.ext_cap != priv->info.ext_cap) { 1466 psmouse_err(psmouse, 1467 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1468 priv->info.identity, info.identity, 1469 priv->info.model_id, info.model_id, 1470 priv->info.capabilities, info.capabilities, 1471 priv->info.ext_cap, info.ext_cap); 1472 return -ENXIO; 1473 } 1474 1475 return 0; 1476} 1477 1478static bool impaired_toshiba_kbc; 1479 1480static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1481#if defined(CONFIG_DMI) && defined(CONFIG_X86) 1482 { 1483 /* Toshiba Satellite */ 1484 .matches = { 1485 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1486 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1487 }, 1488 }, 1489 { 1490 /* Toshiba Dynabook */ 1491 .matches = { 1492 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1493 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1494 }, 1495 }, 1496 { 1497 /* Toshiba Portege M300 */ 1498 .matches = { 1499 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1500 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1501 }, 1502 1503 }, 1504 { 1505 /* Toshiba Portege M300 */ 1506 .matches = { 1507 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1508 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1509 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1510 }, 1511 1512 }, 1513#endif 1514 { } 1515}; 1516 1517static bool broken_olpc_ec; 1518 1519static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1520#if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1521 { 1522 /* OLPC XO-1 or XO-1.5 */ 1523 .matches = { 1524 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1525 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1526 }, 1527 }, 1528#endif 1529 { } 1530}; 1531 1532static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1533#if defined(CONFIG_DMI) && defined(CONFIG_X86) 1534 { 1535 /* Cr-48 Chromebook (Codename Mario) */ 1536 .matches = { 1537 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1538 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1539 }, 1540 }, 1541#endif 1542 { } 1543}; 1544 1545void __init synaptics_module_init(void) 1546{ 1547 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1548 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1549 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1550} 1551 1552static int synaptics_init_ps2(struct psmouse *psmouse, 1553 struct synaptics_device_info *info, 1554 bool absolute_mode) 1555{ 1556 struct synaptics_data *priv; 1557 int err; 1558 1559 synaptics_apply_quirks(psmouse, info); 1560 1561 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1562 if (!priv) 1563 return -ENOMEM; 1564 1565 priv->info = *info; 1566 priv->absolute_mode = absolute_mode; 1567 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1568 priv->disable_gesture = true; 1569 1570 /* 1571 * Unfortunately ForcePad capability is not exported over PS/2, 1572 * so we have to resort to checking PNP IDs. 1573 */ 1574 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1575 1576 err = synaptics_set_mode(psmouse); 1577 if (err) { 1578 psmouse_err(psmouse, "Unable to initialize device.\n"); 1579 goto init_fail; 1580 } 1581 1582 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1583 SYN_NEWABS : SYN_OLDABS; 1584 1585 psmouse_info(psmouse, 1586 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1587 SYN_ID_MODEL(info->identity), 1588 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1589 info->model_id, 1590 info->capabilities, info->ext_cap, info->ext_cap_0c, 1591 info->ext_cap_10, info->board_id, info->firmware_id); 1592 1593 err = set_input_params(psmouse, priv); 1594 if (err) { 1595 psmouse_err(psmouse, 1596 "failed to set up capabilities: %d\n", err); 1597 goto init_fail; 1598 } 1599 1600 /* 1601 * Encode touchpad model so that it can be used to set 1602 * input device->id.version and be visible to userspace. 1603 * Because version is __u16 we have to drop something. 1604 * Hardware info bits seem to be good candidates as they 1605 * are documented to be for Synaptics corp. internal use. 1606 */ 1607 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1608 (info->model_id & 0x000000ff); 1609 1610 if (absolute_mode) { 1611 psmouse->protocol_handler = synaptics_process_byte; 1612 psmouse->pktsize = 6; 1613 } else { 1614 /* Relative mode follows standard PS/2 mouse protocol */ 1615 psmouse->protocol_handler = psmouse_process_byte; 1616 psmouse->pktsize = 3; 1617 } 1618 1619 psmouse->set_rate = synaptics_set_rate; 1620 psmouse->disconnect = synaptics_disconnect; 1621 psmouse->reconnect = synaptics_reconnect; 1622 psmouse->fast_reconnect = NULL; 1623 psmouse->cleanup = synaptics_reset; 1624 /* Synaptics can usually stay in sync without extra help */ 1625 psmouse->resync_time = 0; 1626 1627 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1628 synaptics_pt_create(psmouse); 1629 1630 /* 1631 * Toshiba's KBC seems to have trouble handling data from 1632 * Synaptics at full rate. Switch to a lower rate (roughly 1633 * the same rate as a standard PS/2 mouse). 1634 */ 1635 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1636 psmouse_info(psmouse, 1637 "Toshiba %s detected, limiting rate to 40pps.\n", 1638 dmi_get_system_info(DMI_PRODUCT_NAME)); 1639 psmouse->rate = 40; 1640 } 1641 1642 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1643 err = device_create_file(&psmouse->ps2dev.serio->dev, 1644 &psmouse_attr_disable_gesture.dattr); 1645 if (err) { 1646 psmouse_err(psmouse, 1647 "Failed to create disable_gesture attribute (%d)", 1648 err); 1649 goto init_fail; 1650 } 1651 } 1652 1653 return 0; 1654 1655 init_fail: 1656 kfree(priv); 1657 return err; 1658} 1659 1660static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1661{ 1662 struct synaptics_device_info info; 1663 int error; 1664 1665 psmouse_reset(psmouse); 1666 1667 error = synaptics_query_hardware(psmouse, &info); 1668 if (error) { 1669 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1670 return error; 1671 } 1672 1673 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1674} 1675 1676int synaptics_init_absolute(struct psmouse *psmouse) 1677{ 1678 return __synaptics_init(psmouse, true); 1679} 1680 1681int synaptics_init_relative(struct psmouse *psmouse) 1682{ 1683 return __synaptics_init(psmouse, false); 1684} 1685 1686static int synaptics_setup_ps2(struct psmouse *psmouse, 1687 struct synaptics_device_info *info) 1688{ 1689 bool absolute_mode = true; 1690 int error; 1691 1692 /* 1693 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1694 * packet spew overloads the EC such that key presses on the keyboard 1695 * are missed. Given that, don't even attempt to use Absolute mode. 1696 * Relative mode seems to work just fine. 1697 */ 1698 if (broken_olpc_ec) { 1699 psmouse_info(psmouse, 1700 "OLPC XO detected, forcing relative protocol.\n"); 1701 absolute_mode = false; 1702 } 1703 1704 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1705 if (error) 1706 return error; 1707 1708 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1709} 1710 1711#else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1712 1713void __init synaptics_module_init(void) 1714{ 1715} 1716 1717static int __maybe_unused 1718synaptics_setup_ps2(struct psmouse *psmouse, 1719 struct synaptics_device_info *info) 1720{ 1721 return -ENOSYS; 1722} 1723 1724#endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1725 1726#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1727 1728/* 1729 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1730 * provides a better bandwidth and allow a better control of the touchpads. 1731 * This is used to decide if we need to use this bus or not. 1732 */ 1733enum { 1734 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1735 SYNAPTICS_INTERTOUCH_OFF, 1736 SYNAPTICS_INTERTOUCH_ON, 1737}; 1738 1739static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1740 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1741module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1742MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1743 1744static int synaptics_create_intertouch(struct psmouse *psmouse, 1745 struct synaptics_device_info *info, 1746 bool leave_breadcrumbs) 1747{ 1748 bool topbuttonpad = 1749 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1750 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1751 const struct rmi_device_platform_data pdata = { 1752 .reset_delay_ms = 30, 1753 .sensor_pdata = { 1754 .sensor_type = rmi_sensor_touchpad, 1755 .axis_align.flip_y = true, 1756 .kernel_tracking = false, 1757 .topbuttonpad = topbuttonpad, 1758 }, 1759 .gpio_data = { 1760 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1761 .trackstick_buttons = 1762 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1763 }, 1764 }; 1765 const struct i2c_board_info intertouch_board = { 1766 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1767 .flags = I2C_CLIENT_HOST_NOTIFY, 1768 }; 1769 1770 return psmouse_smbus_init(psmouse, &intertouch_board, 1771 &pdata, sizeof(pdata), true, 1772 leave_breadcrumbs); 1773} 1774 1775/** 1776 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1777 * and decides to instantiate a SMBus InterTouch device. 1778 */ 1779static int synaptics_setup_intertouch(struct psmouse *psmouse, 1780 struct synaptics_device_info *info, 1781 bool leave_breadcrumbs) 1782{ 1783 int error; 1784 1785 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1786 return -ENXIO; 1787 1788 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1789 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1790 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1791 1792 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1793 psmouse_info(psmouse, 1794 "Your touchpad (%s) says it can support a different bus. " 1795 "If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-input@vger.kernel.org.\n", 1796 psmouse->ps2dev.serio->firmware_id); 1797 1798 return -ENXIO; 1799 } 1800 } 1801 1802 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1803 1804 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1805 if (error) { 1806 if (error == -EAGAIN) 1807 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1808 else 1809 psmouse_err(psmouse, "unable to create intertouch device\n"); 1810 1811 return error; 1812 } 1813 1814 return 0; 1815} 1816 1817int synaptics_init_smbus(struct psmouse *psmouse) 1818{ 1819 struct synaptics_device_info info; 1820 int error; 1821 1822 psmouse_reset(psmouse); 1823 1824 error = synaptics_query_hardware(psmouse, &info); 1825 if (error) { 1826 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1827 return error; 1828 } 1829 1830 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1831 return -ENXIO; 1832 1833 return synaptics_create_intertouch(psmouse, &info, false); 1834} 1835 1836#else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1837 1838static int __maybe_unused 1839synaptics_setup_intertouch(struct psmouse *psmouse, 1840 struct synaptics_device_info *info, 1841 bool leave_breadcrumbs) 1842{ 1843 return -ENOSYS; 1844} 1845 1846int synaptics_init_smbus(struct psmouse *psmouse) 1847{ 1848 return -ENOSYS; 1849} 1850 1851#endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1852 1853#if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1854 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1855 1856int synaptics_init(struct psmouse *psmouse) 1857{ 1858 struct synaptics_device_info info; 1859 int error; 1860 int retval; 1861 1862 psmouse_reset(psmouse); 1863 1864 error = synaptics_query_hardware(psmouse, &info); 1865 if (error) { 1866 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1867 return error; 1868 } 1869 1870 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1871 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1872 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1873 /* Forcepads need F21, which is not ready */ 1874 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1875 psmouse_warn(psmouse, 1876 "The touchpad can support a better bus than the too old PS/2 protocol. " 1877 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1878 } 1879 1880 error = synaptics_setup_intertouch(psmouse, &info, true); 1881 if (!error) 1882 return PSMOUSE_SYNAPTICS_SMBUS; 1883 } 1884 1885 retval = synaptics_setup_ps2(psmouse, &info); 1886 if (retval < 0) { 1887 /* 1888 * Not using any flavor of Synaptics support, so clean up 1889 * SMbus breadcrumbs, if any. 1890 */ 1891 psmouse_smbus_cleanup(psmouse); 1892 } 1893 1894 return retval; 1895} 1896 1897#else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1898 1899int synaptics_init(struct psmouse *psmouse) 1900{ 1901 return -ENOSYS; 1902} 1903 1904#endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1905