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