1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Synaptics TouchPad PS/2 mouse driver 4 * 5 * 2003 Dmitry Torokhov <dtor@mail.ru> 6 * Added support for pass-through port. Special thanks to Peter Berg Larsen 7 * for explaining various Synaptics quirks. 8 * 9 * 2003 Peter Osterlund <petero2@telia.com> 10 * Ported to 2.5 input device infrastructure. 11 * 12 * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch> 13 * start merging tpconfig and gpm code to a xfree-input module 14 * adding some changes and extensions (ex. 3rd and 4th button) 15 * 16 * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu> 17 * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com> 18 * code for the special synaptics commands (from the tpconfig-source) 19 * 20 * Trademarks are the property of their respective owners. 21 */ 22 23 #include <linux/module.h> 24 #include <linux/delay.h> 25 #include <linux/dmi.h> 26 #include <linux/input/mt.h> 27 #include <linux/serio.h> 28 #include <linux/libps2.h> 29 #include <linux/rmi.h> 30 #include <linux/i2c.h> 31 #include <linux/slab.h> 32 #include "psmouse.h" 33 #include "synaptics.h" 34 35 /* 36 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide, 37 * section 2.3.2, which says that they should be valid regardless of the 38 * actual size of the sensor. 39 * Note that newer firmware allows querying device for maximum useable 40 * coordinates. 41 */ 42 #define XMIN 0 43 #define XMAX 6143 44 #define YMIN 0 45 #define YMAX 6143 46 #define XMIN_NOMINAL 1472 47 #define XMAX_NOMINAL 5472 48 #define YMIN_NOMINAL 1408 49 #define YMAX_NOMINAL 4448 50 51 /* Size in bits of absolute position values reported by the hardware */ 52 #define ABS_POS_BITS 13 53 54 /* 55 * These values should represent the absolute maximum value that will 56 * be reported for a positive position value. Some Synaptics firmware 57 * uses this value to indicate a finger near the edge of the touchpad 58 * whose precise position cannot be determined. 59 * 60 * At least one touchpad is known to report positions in excess of this 61 * value which are actually negative values truncated to the 13-bit 62 * reporting range. These values have never been observed to be lower 63 * than 8184 (i.e. -8), so we treat all values greater than 8176 as 64 * negative and any other value as positive. 65 */ 66 #define X_MAX_POSITIVE 8176 67 #define Y_MAX_POSITIVE 8176 68 69 /* maximum ABS_MT_POSITION displacement (in mm) */ 70 #define DMAX 10 71 72 /***************************************************************************** 73 * Stuff we need even when we do not want native Synaptics support 74 ****************************************************************************/ 75 76 /* 77 * Set the synaptics touchpad mode byte by special commands 78 */ 79 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode) 80 { 81 u8 param[1]; 82 int error; 83 84 error = ps2_sliced_command(&psmouse->ps2dev, mode); 85 if (error) 86 return error; 87 88 param[0] = SYN_PS_SET_MODE2; 89 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE); 90 if (error) 91 return error; 92 93 return 0; 94 } 95 96 int synaptics_detect(struct psmouse *psmouse, bool set_properties) 97 { 98 struct ps2dev *ps2dev = &psmouse->ps2dev; 99 u8 param[4] = { 0 }; 100 101 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 102 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 103 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 104 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 105 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 106 107 if (param[1] != 0x47) 108 return -ENODEV; 109 110 if (set_properties) { 111 psmouse->vendor = "Synaptics"; 112 psmouse->name = "TouchPad"; 113 } 114 115 return 0; 116 } 117 118 void synaptics_reset(struct psmouse *psmouse) 119 { 120 /* reset touchpad back to relative mode, gestures enabled */ 121 synaptics_mode_cmd(psmouse, 0); 122 } 123 124 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 125 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 126 127 /* This list has been kindly provided by Synaptics. */ 128 static const char * const topbuttonpad_pnp_ids[] = { 129 "LEN0017", 130 "LEN0018", 131 "LEN0019", 132 "LEN0023", 133 "LEN002A", 134 "LEN002B", 135 "LEN002C", 136 "LEN002D", 137 "LEN002E", 138 "LEN0033", /* Helix */ 139 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */ 140 "LEN0035", /* X240 */ 141 "LEN0036", /* T440 */ 142 "LEN0037", /* X1 Carbon 2nd */ 143 "LEN0038", 144 "LEN0039", /* T440s */ 145 "LEN0041", 146 "LEN0042", /* Yoga */ 147 "LEN0045", 148 "LEN0047", 149 "LEN2000", /* S540 */ 150 "LEN2001", /* Edge E431 */ 151 "LEN2002", /* Edge E531 */ 152 "LEN2003", 153 "LEN2004", /* L440 */ 154 "LEN2005", 155 "LEN2006", /* Edge E440/E540 */ 156 "LEN2007", 157 "LEN2008", 158 "LEN2009", 159 "LEN200A", 160 "LEN200B", 161 NULL 162 }; 163 164 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 165 static const char * const smbus_pnp_ids[] = { 166 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */ 167 "DLL0597", /* Dell Inspiron 3521 */ 168 "DLL060d", /* Dell Precision M3800 */ 169 "LEN0048", /* X1 Carbon 3 */ 170 "LEN0046", /* X250 */ 171 "LEN0049", /* Yoga 11e */ 172 "LEN004a", /* W541 */ 173 "LEN005b", /* P50 */ 174 "LEN005e", /* T560 */ 175 "LEN006c", /* T470s */ 176 "LEN007a", /* T470s */ 177 "LEN0071", /* T480 */ 178 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 179 "LEN0073", /* X1 Carbon G5 (Elantech) */ 180 "LEN0091", /* X1 Carbon 6 */ 181 "LEN0092", /* X1 Carbon 6 */ 182 "LEN0093", /* T480 */ 183 "LEN0096", /* X280 */ 184 "LEN0097", /* X280 -> ALPS trackpoint */ 185 "LEN0099", /* X1 Extreme Gen 1 / P1 Gen 1 */ 186 "LEN009b", /* T580 */ 187 "LEN0402", /* X1 Extreme Gen 2 / P1 Gen 2 */ 188 "LEN040f", /* P1 Gen 3 */ 189 "LEN0411", /* L14 Gen 1 */ 190 "LEN200f", /* T450s */ 191 "LEN2044", /* L470 */ 192 "LEN2054", /* E480 */ 193 "LEN2055", /* E580 */ 194 "LEN2058", /* E490 */ 195 "LEN205b", /* T490 */ 196 "LEN2068", /* T14 Gen 1 */ 197 "SYN1221", /* TUXEDO InfinityBook Pro 14 v5 */ 198 "SYN3003", /* HP EliteBook 850 G1 */ 199 "SYN3015", /* HP EliteBook 840 G2 */ 200 "SYN3052", /* HP EliteBook 840 G4 */ 201 "SYN3221", /* HP 15-ay000 */ 202 "SYN323d", /* HP Spectre X360 13-w013dx */ 203 "SYN3257", /* HP Envy 13-ad105ng */ 204 "TOS01f6", /* Dynabook Portege X30L-G */ 205 "TOS0213", /* Dynabook Portege X30-D */ 206 NULL 207 }; 208 #endif 209 210 static const char * const forcepad_pnp_ids[] = { 211 "SYN300D", 212 "SYN3014", 213 NULL 214 }; 215 216 /* 217 * Send a command to the synaptics touchpad by special commands 218 */ 219 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 220 { 221 int error; 222 223 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 224 if (error) 225 return error; 226 227 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 228 if (error) 229 return error; 230 231 return 0; 232 } 233 234 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 235 { 236 int error; 237 union { 238 __be32 be_val; 239 char buf[4]; 240 } resp = { 0 }; 241 242 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 243 if (error) 244 return error; 245 246 *val = be32_to_cpu(resp.be_val); 247 return 0; 248 } 249 250 /* 251 * Identify Touchpad 252 * See also the SYN_ID_* macros 253 */ 254 static int synaptics_identify(struct psmouse *psmouse, 255 struct synaptics_device_info *info) 256 { 257 int error; 258 259 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 260 if (error) 261 return error; 262 263 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 264 } 265 266 /* 267 * Read the model-id bytes from the touchpad 268 * see also SYN_MODEL_* macros 269 */ 270 static int synaptics_model_id(struct psmouse *psmouse, 271 struct synaptics_device_info *info) 272 { 273 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 274 } 275 276 /* 277 * Read the firmware id from the touchpad 278 */ 279 static int synaptics_firmware_id(struct psmouse *psmouse, 280 struct synaptics_device_info *info) 281 { 282 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 283 &info->firmware_id); 284 } 285 286 /* 287 * Read the board id and the "More Extended Queries" from the touchpad 288 * The board id is encoded in the "QUERY MODES" response 289 */ 290 static int synaptics_query_modes(struct psmouse *psmouse, 291 struct synaptics_device_info *info) 292 { 293 u8 bid[3]; 294 int error; 295 296 /* firmwares prior 7.5 have no board_id encoded */ 297 if (SYN_ID_FULL(info->identity) < 0x705) 298 return 0; 299 300 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 301 if (error) 302 return error; 303 304 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 305 306 if (SYN_MEXT_CAP_BIT(bid[0])) 307 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 308 &info->ext_cap_10); 309 310 return 0; 311 } 312 313 /* 314 * Read the capability-bits from the touchpad 315 * see also the SYN_CAP_* macros 316 */ 317 static int synaptics_capability(struct psmouse *psmouse, 318 struct synaptics_device_info *info) 319 { 320 int error; 321 322 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 323 &info->capabilities); 324 if (error) 325 return error; 326 327 info->ext_cap = info->ext_cap_0c = 0; 328 329 /* 330 * Older firmwares had submodel ID fixed to 0x47 331 */ 332 if (SYN_ID_FULL(info->identity) < 0x705 && 333 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 334 return -ENXIO; 335 } 336 337 /* 338 * Unless capExtended is set the rest of the flags should be ignored 339 */ 340 if (!SYN_CAP_EXTENDED(info->capabilities)) 341 info->capabilities = 0; 342 343 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 344 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 345 &info->ext_cap); 346 if (error) { 347 psmouse_warn(psmouse, 348 "device claims to have extended capabilities, but I'm not able to read them.\n"); 349 } else { 350 /* 351 * if nExtBtn is greater than 8 it should be considered 352 * invalid and treated as 0 353 */ 354 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 355 info->ext_cap &= ~SYN_CAP_MB_MASK; 356 } 357 } 358 359 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 360 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 361 &info->ext_cap_0c); 362 if (error) 363 psmouse_warn(psmouse, 364 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 365 } 366 367 return 0; 368 } 369 370 /* 371 * Read touchpad resolution and maximum reported coordinates 372 * Resolution is left zero if touchpad does not support the query 373 */ 374 static int synaptics_resolution(struct psmouse *psmouse, 375 struct synaptics_device_info *info) 376 { 377 u8 resp[3]; 378 int error; 379 380 if (SYN_ID_MAJOR(info->identity) < 4) 381 return 0; 382 383 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 384 if (!error) { 385 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 386 info->x_res = resp[0]; /* x resolution in units/mm */ 387 info->y_res = resp[2]; /* y resolution in units/mm */ 388 } 389 } 390 391 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 392 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 393 error = synaptics_send_cmd(psmouse, 394 SYN_QUE_EXT_MAX_COORDS, resp); 395 if (error) { 396 psmouse_warn(psmouse, 397 "device claims to have max coordinates query, but I'm not able to read it.\n"); 398 } else { 399 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 400 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 401 psmouse_info(psmouse, 402 "queried max coordinates: x [..%d], y [..%d]\n", 403 info->x_max, info->y_max); 404 } 405 } 406 407 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 408 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 409 /* 410 * Firmware v8.1 does not report proper number of extended 411 * capabilities, but has been proven to report correct min 412 * coordinates. 413 */ 414 SYN_ID_FULL(info->identity) == 0x801)) { 415 error = synaptics_send_cmd(psmouse, 416 SYN_QUE_EXT_MIN_COORDS, resp); 417 if (error) { 418 psmouse_warn(psmouse, 419 "device claims to have min coordinates query, but I'm not able to read it.\n"); 420 } else { 421 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 422 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 423 psmouse_info(psmouse, 424 "queried min coordinates: x [%d..], y [%d..]\n", 425 info->x_min, info->y_min); 426 } 427 } 428 429 return 0; 430 } 431 432 static int synaptics_query_hardware(struct psmouse *psmouse, 433 struct synaptics_device_info *info) 434 { 435 int error; 436 437 memset(info, 0, sizeof(*info)); 438 439 error = synaptics_identify(psmouse, info); 440 if (error) 441 return error; 442 443 error = synaptics_model_id(psmouse, info); 444 if (error) 445 return error; 446 447 error = synaptics_firmware_id(psmouse, info); 448 if (error) 449 return error; 450 451 error = synaptics_query_modes(psmouse, info); 452 if (error) 453 return error; 454 455 error = synaptics_capability(psmouse, info); 456 if (error) 457 return error; 458 459 error = synaptics_resolution(psmouse, info); 460 if (error) 461 return error; 462 463 return 0; 464 } 465 466 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 467 468 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 469 470 static bool cr48_profile_sensor; 471 472 #define ANY_BOARD_ID 0 473 struct min_max_quirk { 474 const char * const *pnp_ids; 475 struct { 476 u32 min, max; 477 } board_id; 478 u32 x_min, x_max, y_min, y_max; 479 }; 480 481 static const struct min_max_quirk min_max_pnpid_table[] = { 482 { 483 (const char * const []){"LEN0033", NULL}, 484 {ANY_BOARD_ID, ANY_BOARD_ID}, 485 1024, 5052, 2258, 4832 486 }, 487 { 488 (const char * const []){"LEN0042", NULL}, 489 {ANY_BOARD_ID, ANY_BOARD_ID}, 490 1232, 5710, 1156, 4696 491 }, 492 { 493 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 494 "LEN0039", "LEN2002", "LEN2004", 495 NULL}, 496 {ANY_BOARD_ID, 2961}, 497 1024, 5112, 2024, 4832 498 }, 499 { 500 (const char * const []){"LEN2000", NULL}, 501 {ANY_BOARD_ID, ANY_BOARD_ID}, 502 1024, 5113, 2021, 4832 503 }, 504 { 505 (const char * const []){"LEN2001", NULL}, 506 {ANY_BOARD_ID, ANY_BOARD_ID}, 507 1024, 5022, 2508, 4832 508 }, 509 { 510 (const char * const []){"LEN2006", NULL}, 511 {2691, 2691}, 512 1024, 5045, 2457, 4832 513 }, 514 { 515 (const char * const []){"LEN2006", NULL}, 516 {ANY_BOARD_ID, ANY_BOARD_ID}, 517 1264, 5675, 1171, 4688 518 }, 519 { } 520 }; 521 522 /***************************************************************************** 523 * Synaptics communications functions 524 ****************************************************************************/ 525 526 /* 527 * Synaptics touchpads report the y coordinate from bottom to top, which is 528 * opposite from what userspace expects. 529 * This function is used to invert y before reporting. 530 */ 531 static int synaptics_invert_y(int y) 532 { 533 return YMAX_NOMINAL + YMIN_NOMINAL - y; 534 } 535 536 /* 537 * Apply quirk(s) if the hardware matches 538 */ 539 static void synaptics_apply_quirks(struct psmouse *psmouse, 540 struct synaptics_device_info *info) 541 { 542 int i; 543 544 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 545 if (!psmouse_matches_pnp_id(psmouse, 546 min_max_pnpid_table[i].pnp_ids)) 547 continue; 548 549 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 550 info->board_id < min_max_pnpid_table[i].board_id.min) 551 continue; 552 553 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 554 info->board_id > min_max_pnpid_table[i].board_id.max) 555 continue; 556 557 info->x_min = min_max_pnpid_table[i].x_min; 558 info->x_max = min_max_pnpid_table[i].x_max; 559 info->y_min = min_max_pnpid_table[i].y_min; 560 info->y_max = min_max_pnpid_table[i].y_max; 561 psmouse_info(psmouse, 562 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 563 info->x_min, info->x_max, 564 info->y_min, info->y_max); 565 break; 566 } 567 } 568 569 static bool synaptics_has_agm(struct synaptics_data *priv) 570 { 571 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 572 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 573 } 574 575 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 576 { 577 static u8 param = 0xc8; 578 int error; 579 580 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 581 if (error) 582 return error; 583 584 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 585 if (error) 586 return error; 587 588 return 0; 589 } 590 591 static int synaptics_set_mode(struct psmouse *psmouse) 592 { 593 struct synaptics_data *priv = psmouse->private; 594 int error; 595 596 priv->mode = 0; 597 if (priv->absolute_mode) 598 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 599 if (priv->disable_gesture) 600 priv->mode |= SYN_BIT_DISABLE_GESTURE; 601 if (psmouse->rate >= 80) 602 priv->mode |= SYN_BIT_HIGH_RATE; 603 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 604 priv->mode |= SYN_BIT_W_MODE; 605 606 error = synaptics_mode_cmd(psmouse, priv->mode); 607 if (error) 608 return error; 609 610 if (priv->absolute_mode && synaptics_has_agm(priv)) { 611 error = synaptics_set_advanced_gesture_mode(psmouse); 612 if (error) { 613 psmouse_err(psmouse, 614 "Advanced gesture mode init failed: %d\n", 615 error); 616 return error; 617 } 618 } 619 620 return 0; 621 } 622 623 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 624 { 625 struct synaptics_data *priv = psmouse->private; 626 627 if (rate >= 80) { 628 priv->mode |= SYN_BIT_HIGH_RATE; 629 psmouse->rate = 80; 630 } else { 631 priv->mode &= ~SYN_BIT_HIGH_RATE; 632 psmouse->rate = 40; 633 } 634 635 synaptics_mode_cmd(psmouse, priv->mode); 636 } 637 638 /***************************************************************************** 639 * Synaptics pass-through PS/2 port support 640 ****************************************************************************/ 641 static int synaptics_pt_write(struct serio *serio, u8 c) 642 { 643 struct psmouse *parent = psmouse_from_serio(serio->parent); 644 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 645 int error; 646 647 error = ps2_sliced_command(&parent->ps2dev, c); 648 if (error) 649 return error; 650 651 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 652 if (error) 653 return error; 654 655 return 0; 656 } 657 658 static int synaptics_pt_start(struct serio *serio) 659 { 660 struct psmouse *parent = psmouse_from_serio(serio->parent); 661 struct synaptics_data *priv = parent->private; 662 663 guard(serio_pause_rx)(parent->ps2dev.serio); 664 priv->pt_port = serio; 665 666 return 0; 667 } 668 669 static void synaptics_pt_stop(struct serio *serio) 670 { 671 struct psmouse *parent = psmouse_from_serio(serio->parent); 672 struct synaptics_data *priv = parent->private; 673 674 guard(serio_pause_rx)(parent->ps2dev.serio); 675 priv->pt_port = NULL; 676 } 677 678 static int synaptics_pt_open(struct serio *serio) 679 { 680 struct psmouse *parent = psmouse_from_serio(serio->parent); 681 struct synaptics_data *priv = parent->private; 682 683 guard(serio_pause_rx)(parent->ps2dev.serio); 684 priv->pt_port_open = true; 685 686 return 0; 687 } 688 689 static void synaptics_pt_close(struct serio *serio) 690 { 691 struct psmouse *parent = psmouse_from_serio(serio->parent); 692 struct synaptics_data *priv = parent->private; 693 694 guard(serio_pause_rx)(parent->ps2dev.serio); 695 priv->pt_port_open = false; 696 } 697 698 static int synaptics_is_pt_packet(u8 *buf) 699 { 700 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 701 } 702 703 static void synaptics_pass_pt_packet(struct synaptics_data *priv, u8 *packet) 704 { 705 struct serio *ptport; 706 707 ptport = priv->pt_port; 708 if (!ptport) 709 return; 710 711 serio_interrupt(ptport, packet[1], 0); 712 713 if (priv->pt_port_open) { 714 struct psmouse *child = psmouse_from_serio(ptport); 715 716 if (child->state == PSMOUSE_ACTIVATED) { 717 serio_interrupt(ptport, packet[4], 0); 718 serio_interrupt(ptport, packet[5], 0); 719 if (child->pktsize == 4) 720 serio_interrupt(ptport, packet[2], 0); 721 } 722 } 723 } 724 725 static void synaptics_pt_activate(struct psmouse *psmouse) 726 { 727 struct synaptics_data *priv = psmouse->private; 728 struct psmouse *child = psmouse_from_serio(priv->pt_port); 729 730 /* adjust the touchpad to child's choice of protocol */ 731 if (child) { 732 if (child->pktsize == 4) 733 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 734 else 735 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 736 737 if (synaptics_mode_cmd(psmouse, priv->mode)) 738 psmouse_warn(psmouse, 739 "failed to switch guest protocol\n"); 740 } 741 } 742 743 static void synaptics_pt_create(struct psmouse *psmouse) 744 { 745 struct serio *serio; 746 747 serio = kzalloc_obj(*serio); 748 if (!serio) { 749 psmouse_err(psmouse, 750 "not enough memory for pass-through port\n"); 751 return; 752 } 753 754 serio->id.type = SERIO_PS_PSTHRU; 755 strscpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 756 strscpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 757 serio->write = synaptics_pt_write; 758 serio->start = synaptics_pt_start; 759 serio->stop = synaptics_pt_stop; 760 serio->open = synaptics_pt_open; 761 serio->close = synaptics_pt_close; 762 serio->parent = psmouse->ps2dev.serio; 763 764 psmouse->pt_activate = synaptics_pt_activate; 765 766 psmouse_info(psmouse, "serio: %s port at %s\n", 767 serio->name, psmouse->phys); 768 serio_register_port(serio); 769 } 770 771 /***************************************************************************** 772 * Functions to interpret the absolute mode packets 773 ****************************************************************************/ 774 775 static void synaptics_parse_agm(const u8 buf[], 776 struct synaptics_data *priv, 777 struct synaptics_hw_state *hw) 778 { 779 struct synaptics_hw_state *agm = &priv->agm; 780 int agm_packet_type; 781 782 agm_packet_type = (buf[5] & 0x30) >> 4; 783 switch (agm_packet_type) { 784 case 1: 785 /* Gesture packet: (x, y, z) half resolution */ 786 agm->w = hw->w; 787 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 788 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 789 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 790 break; 791 792 case 2: 793 /* AGM-CONTACT packet: we are only interested in the count */ 794 priv->agm_count = buf[1]; 795 break; 796 797 default: 798 break; 799 } 800 } 801 802 static void synaptics_parse_ext_buttons(const u8 buf[], 803 struct synaptics_data *priv, 804 struct synaptics_hw_state *hw) 805 { 806 unsigned int ext_bits = 807 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 808 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 809 810 hw->ext_buttons = buf[4] & ext_mask; 811 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 812 } 813 814 static int synaptics_parse_hw_state(const u8 buf[], 815 struct synaptics_data *priv, 816 struct synaptics_hw_state *hw) 817 { 818 memset(hw, 0, sizeof(struct synaptics_hw_state)); 819 820 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 821 hw->w = (((buf[0] & 0x30) >> 2) | 822 ((buf[0] & 0x04) >> 1) | 823 ((buf[3] & 0x04) >> 2)); 824 825 if (synaptics_has_agm(priv) && hw->w == 2) { 826 synaptics_parse_agm(buf, priv, hw); 827 return 1; 828 } 829 830 hw->x = (((buf[3] & 0x10) << 8) | 831 ((buf[1] & 0x0f) << 8) | 832 buf[4]); 833 hw->y = (((buf[3] & 0x20) << 7) | 834 ((buf[1] & 0xf0) << 4) | 835 buf[5]); 836 hw->z = buf[2]; 837 838 hw->left = (buf[0] & 0x01) ? 1 : 0; 839 hw->right = (buf[0] & 0x02) ? 1 : 0; 840 841 if (priv->is_forcepad) { 842 /* 843 * ForcePads, like Clickpads, use middle button 844 * bits to report primary button clicks. 845 * Unfortunately they report primary button not 846 * only when user presses on the pad above certain 847 * threshold, but also when there are more than one 848 * finger on the touchpad, which interferes with 849 * out multi-finger gestures. 850 */ 851 if (hw->z == 0) { 852 /* No contacts */ 853 priv->press = priv->report_press = false; 854 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 855 /* 856 * Single-finger touch with pressure above 857 * the threshold. If pressure stays long 858 * enough, we'll start reporting primary 859 * button. We rely on the device continuing 860 * sending data even if finger does not 861 * move. 862 */ 863 if (!priv->press) { 864 priv->press_start = jiffies; 865 priv->press = true; 866 } else if (time_after(jiffies, 867 priv->press_start + 868 msecs_to_jiffies(50))) { 869 priv->report_press = true; 870 } 871 } else { 872 priv->press = false; 873 } 874 875 hw->left = priv->report_press; 876 877 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 878 /* 879 * Clickpad's button is transmitted as middle button, 880 * however, since it is primary button, we will report 881 * it as BTN_LEFT. 882 */ 883 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 884 885 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 886 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 887 if (hw->w == 2) 888 hw->scroll = (s8)buf[1]; 889 } 890 891 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 892 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 893 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 894 } 895 896 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 897 ((buf[0] ^ buf[3]) & 0x02)) { 898 synaptics_parse_ext_buttons(buf, priv, hw); 899 } 900 } else { 901 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 902 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 903 904 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 905 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 906 907 hw->left = (buf[0] & 0x01) ? 1 : 0; 908 hw->right = (buf[0] & 0x02) ? 1 : 0; 909 } 910 911 /* 912 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 913 * is used by some firmware to indicate a finger at the edge of 914 * the touchpad whose precise position cannot be determined, so 915 * convert these values to the maximum axis value. 916 */ 917 if (hw->x > X_MAX_POSITIVE) 918 hw->x -= 1 << ABS_POS_BITS; 919 else if (hw->x == X_MAX_POSITIVE) 920 hw->x = XMAX; 921 922 if (hw->y > Y_MAX_POSITIVE) 923 hw->y -= 1 << ABS_POS_BITS; 924 else if (hw->y == Y_MAX_POSITIVE) 925 hw->y = YMAX; 926 927 return 0; 928 } 929 930 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 931 bool active, int x, int y) 932 { 933 input_mt_slot(dev, slot); 934 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 935 if (active) { 936 input_report_abs(dev, ABS_MT_POSITION_X, x); 937 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 938 } 939 } 940 941 static void synaptics_report_semi_mt_data(struct input_dev *dev, 942 const struct synaptics_hw_state *a, 943 const struct synaptics_hw_state *b, 944 int num_fingers) 945 { 946 if (num_fingers >= 2) { 947 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 948 min(a->y, b->y)); 949 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 950 max(a->y, b->y)); 951 } else if (num_fingers == 1) { 952 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 953 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 954 } else { 955 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 956 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 957 } 958 } 959 960 static void synaptics_report_ext_buttons(struct psmouse *psmouse, 961 const struct synaptics_hw_state *hw) 962 { 963 struct input_dev *dev = psmouse->dev; 964 struct synaptics_data *priv = psmouse->private; 965 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 966 int i; 967 968 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 969 return; 970 971 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 972 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 973 SYN_ID_FULL(priv->info.identity) == 0x802) && 974 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 975 return; 976 977 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 978 for (i = 0; i < ext_bits; i++) { 979 input_report_key(dev, BTN_0 + 2 * i, 980 hw->ext_buttons & BIT(i)); 981 input_report_key(dev, BTN_1 + 2 * i, 982 hw->ext_buttons & BIT(i + ext_bits)); 983 } 984 return; 985 } 986 987 /* 988 * This generation of touchpads has the trackstick buttons 989 * physically wired to the touchpad. Re-route them through 990 * the pass-through interface. 991 */ 992 if (priv->pt_port) { 993 u8 pt_buttons; 994 995 /* The trackstick expects at most 3 buttons */ 996 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 997 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 998 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 999 1000 serio_interrupt(priv->pt_port, 1001 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 1002 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 1003 } 1004 } 1005 1006 static void synaptics_report_buttons(struct psmouse *psmouse, 1007 const struct synaptics_hw_state *hw) 1008 { 1009 struct input_dev *dev = psmouse->dev; 1010 struct synaptics_data *priv = psmouse->private; 1011 1012 input_report_key(dev, BTN_LEFT, hw->left); 1013 input_report_key(dev, BTN_RIGHT, hw->right); 1014 1015 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 1016 input_report_key(dev, BTN_MIDDLE, hw->middle); 1017 1018 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 1019 input_report_key(dev, BTN_FORWARD, hw->up); 1020 input_report_key(dev, BTN_BACK, hw->down); 1021 } 1022 1023 synaptics_report_ext_buttons(psmouse, hw); 1024 } 1025 1026 static void synaptics_report_mt_data(struct psmouse *psmouse, 1027 const struct synaptics_hw_state *sgm, 1028 int num_fingers) 1029 { 1030 struct input_dev *dev = psmouse->dev; 1031 struct synaptics_data *priv = psmouse->private; 1032 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 1033 struct input_mt_pos pos[2]; 1034 int slot[2], nsemi, i; 1035 1036 nsemi = clamp_val(num_fingers, 0, 2); 1037 1038 for (i = 0; i < nsemi; i++) { 1039 pos[i].x = hw[i]->x; 1040 pos[i].y = synaptics_invert_y(hw[i]->y); 1041 } 1042 1043 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 1044 1045 for (i = 0; i < nsemi; i++) { 1046 input_mt_slot(dev, slot[i]); 1047 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1048 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1049 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1050 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1051 } 1052 1053 input_mt_drop_unused(dev); 1054 1055 /* Don't use active slot count to generate BTN_TOOL events. */ 1056 input_mt_report_pointer_emulation(dev, false); 1057 1058 /* Send the number of fingers reported by touchpad itself. */ 1059 input_mt_report_finger_count(dev, num_fingers); 1060 1061 synaptics_report_buttons(psmouse, sgm); 1062 1063 input_sync(dev); 1064 } 1065 1066 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1067 struct synaptics_hw_state *sgm) 1068 { 1069 struct synaptics_data *priv = psmouse->private; 1070 int num_fingers; 1071 1072 /* 1073 * Update mt_state using the new finger count and current mt_state. 1074 */ 1075 if (sgm->z == 0) 1076 num_fingers = 0; 1077 else if (sgm->w >= 4) 1078 num_fingers = 1; 1079 else if (sgm->w == 0) 1080 num_fingers = 2; 1081 else if (sgm->w == 1) 1082 num_fingers = priv->agm_count ? priv->agm_count : 3; 1083 else 1084 num_fingers = 4; 1085 1086 /* Send resulting input events to user space */ 1087 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1088 } 1089 1090 static bool synaptics_has_multifinger(struct synaptics_data *priv) 1091 { 1092 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1093 return true; 1094 1095 /* Advanced gesture mode also sends multi finger data */ 1096 return synaptics_has_agm(priv); 1097 } 1098 1099 /* 1100 * called for each full received packet from the touchpad 1101 */ 1102 static void synaptics_process_packet(struct psmouse *psmouse) 1103 { 1104 struct input_dev *dev = psmouse->dev; 1105 struct synaptics_data *priv = psmouse->private; 1106 struct synaptics_device_info *info = &priv->info; 1107 struct synaptics_hw_state hw; 1108 int num_fingers; 1109 int finger_width; 1110 1111 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1112 return; 1113 1114 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1115 synaptics_image_sensor_process(psmouse, &hw); 1116 return; 1117 } 1118 1119 if (hw.scroll) { 1120 priv->scroll += hw.scroll; 1121 1122 while (priv->scroll >= 4) { 1123 input_report_key(dev, BTN_BACK, !hw.down); 1124 input_sync(dev); 1125 input_report_key(dev, BTN_BACK, hw.down); 1126 input_sync(dev); 1127 priv->scroll -= 4; 1128 } 1129 while (priv->scroll <= -4) { 1130 input_report_key(dev, BTN_FORWARD, !hw.up); 1131 input_sync(dev); 1132 input_report_key(dev, BTN_FORWARD, hw.up); 1133 input_sync(dev); 1134 priv->scroll += 4; 1135 } 1136 return; 1137 } 1138 1139 if (hw.z > 0 && hw.x > 1) { 1140 num_fingers = 1; 1141 finger_width = 5; 1142 if (SYN_CAP_EXTENDED(info->capabilities)) { 1143 switch (hw.w) { 1144 case 0 ... 1: 1145 if (synaptics_has_multifinger(priv)) 1146 num_fingers = hw.w + 2; 1147 break; 1148 case 2: 1149 /* 1150 * SYN_MODEL_PEN(info->model_id): even if 1151 * the device supports pen, we treat it as 1152 * a single finger. 1153 */ 1154 break; 1155 case 4 ... 15: 1156 if (SYN_CAP_PALMDETECT(info->capabilities)) 1157 finger_width = hw.w; 1158 break; 1159 } 1160 } 1161 } else { 1162 num_fingers = 0; 1163 finger_width = 0; 1164 } 1165 1166 if (cr48_profile_sensor) { 1167 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1168 return; 1169 } 1170 1171 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1172 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1173 num_fingers); 1174 1175 /* Post events 1176 * BTN_TOUCH has to be first as mousedev relies on it when doing 1177 * absolute -> relative conversion 1178 */ 1179 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1180 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1181 1182 if (num_fingers > 0) { 1183 input_report_abs(dev, ABS_X, hw.x); 1184 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1185 } 1186 input_report_abs(dev, ABS_PRESSURE, hw.z); 1187 1188 if (SYN_CAP_PALMDETECT(info->capabilities)) 1189 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1190 1191 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1192 if (synaptics_has_multifinger(priv)) { 1193 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1194 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1195 } 1196 1197 synaptics_report_buttons(psmouse, &hw); 1198 1199 input_sync(dev); 1200 } 1201 1202 static bool synaptics_validate_byte(struct psmouse *psmouse, 1203 int idx, enum synaptics_pkt_type pkt_type) 1204 { 1205 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1206 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1207 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1208 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1209 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1210 const u8 *packet = psmouse->packet; 1211 1212 if (idx < 0 || idx > 4) 1213 return false; 1214 1215 switch (pkt_type) { 1216 1217 case SYN_NEWABS: 1218 case SYN_NEWABS_RELAXED: 1219 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1220 1221 case SYN_NEWABS_STRICT: 1222 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1223 1224 case SYN_OLDABS: 1225 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1226 1227 default: 1228 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1229 return false; 1230 } 1231 } 1232 1233 static enum synaptics_pkt_type 1234 synaptics_detect_pkt_type(struct psmouse *psmouse) 1235 { 1236 int i; 1237 1238 for (i = 0; i < 5; i++) { 1239 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1240 psmouse_info(psmouse, "using relaxed packet validation\n"); 1241 return SYN_NEWABS_RELAXED; 1242 } 1243 } 1244 1245 return SYN_NEWABS_STRICT; 1246 } 1247 1248 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1249 { 1250 struct synaptics_data *priv = psmouse->private; 1251 1252 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1253 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1254 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1255 1256 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1257 synaptics_is_pt_packet(psmouse->packet)) { 1258 synaptics_pass_pt_packet(priv, psmouse->packet); 1259 } else { 1260 synaptics_process_packet(psmouse); 1261 } 1262 1263 return PSMOUSE_FULL_PACKET; 1264 } 1265 1266 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1267 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1268 } 1269 1270 /***************************************************************************** 1271 * Driver initialization/cleanup functions 1272 ****************************************************************************/ 1273 static void set_abs_position_params(struct input_dev *dev, 1274 struct synaptics_device_info *info, 1275 int x_code, int y_code) 1276 { 1277 int x_min = info->x_min ?: XMIN_NOMINAL; 1278 int x_max = info->x_max ?: XMAX_NOMINAL; 1279 int y_min = info->y_min ?: YMIN_NOMINAL; 1280 int y_max = info->y_max ?: YMAX_NOMINAL; 1281 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1282 SYN_REDUCED_FILTER_FUZZ : 0; 1283 1284 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1285 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1286 input_abs_set_res(dev, x_code, info->x_res); 1287 input_abs_set_res(dev, y_code, info->y_res); 1288 } 1289 1290 static int set_input_params(struct psmouse *psmouse, 1291 struct synaptics_data *priv) 1292 { 1293 struct input_dev *dev = psmouse->dev; 1294 struct synaptics_device_info *info = &priv->info; 1295 int i; 1296 int error; 1297 1298 /* Reset default psmouse capabilities */ 1299 __clear_bit(EV_REL, dev->evbit); 1300 bitmap_zero(dev->relbit, REL_CNT); 1301 bitmap_zero(dev->keybit, KEY_CNT); 1302 1303 /* Things that apply to both modes */ 1304 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1305 1306 input_set_capability(dev, EV_KEY, BTN_LEFT); 1307 1308 /* Clickpads report only left button */ 1309 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1310 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1311 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1312 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1313 } 1314 1315 if (!priv->absolute_mode) { 1316 /* Relative mode */ 1317 input_set_capability(dev, EV_REL, REL_X); 1318 input_set_capability(dev, EV_REL, REL_Y); 1319 return 0; 1320 } 1321 1322 /* Absolute mode */ 1323 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1324 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1325 1326 if (cr48_profile_sensor) 1327 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1328 1329 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1330 set_abs_position_params(dev, info, 1331 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1332 /* Image sensors can report per-contact pressure */ 1333 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1334 1335 error = input_mt_init_slots(dev, 2, 1336 INPUT_MT_POINTER | INPUT_MT_TRACK); 1337 if (error) 1338 return error; 1339 1340 /* Image sensors can signal 4 and 5 finger clicks */ 1341 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1342 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1343 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1344 set_abs_position_params(dev, info, 1345 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1346 /* 1347 * Profile sensor in CR-48 tracks contacts reasonably well, 1348 * other non-image sensors with AGM use semi-mt. 1349 */ 1350 error = input_mt_init_slots(dev, 2, 1351 INPUT_MT_POINTER | 1352 (cr48_profile_sensor ? 1353 INPUT_MT_TRACK : 1354 INPUT_MT_SEMI_MT)); 1355 if (error) 1356 return error; 1357 1358 /* 1359 * For semi-mt devices we send ABS_X/Y ourselves instead of 1360 * input_mt_report_pointer_emulation. But 1361 * input_mt_init_slots() resets the fuzz to 0, leading to a 1362 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1363 * position. Let's re-initialize ABS_X/Y here. 1364 */ 1365 if (!cr48_profile_sensor) 1366 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1367 } 1368 1369 if (SYN_CAP_PALMDETECT(info->capabilities)) 1370 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1371 1372 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1373 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1374 1375 if (synaptics_has_multifinger(priv)) { 1376 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1377 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1378 } 1379 1380 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1381 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1382 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1383 input_set_capability(dev, EV_KEY, BTN_BACK); 1384 } 1385 1386 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1387 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1388 input_set_capability(dev, EV_KEY, BTN_0 + i); 1389 1390 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1391 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1392 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1393 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1394 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1395 } 1396 1397 return 0; 1398 } 1399 1400 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1401 void *data, char *buf) 1402 { 1403 struct synaptics_data *priv = psmouse->private; 1404 1405 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1406 } 1407 1408 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1409 void *data, const char *buf, 1410 size_t len) 1411 { 1412 struct synaptics_data *priv = psmouse->private; 1413 unsigned int value; 1414 int err; 1415 1416 err = kstrtouint(buf, 10, &value); 1417 if (err) 1418 return err; 1419 1420 if (value > 1) 1421 return -EINVAL; 1422 1423 if (value == priv->disable_gesture) 1424 return len; 1425 1426 priv->disable_gesture = value; 1427 if (value) 1428 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1429 else 1430 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1431 1432 if (synaptics_mode_cmd(psmouse, priv->mode)) 1433 return -EIO; 1434 1435 return len; 1436 } 1437 1438 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1439 synaptics_show_disable_gesture, 1440 synaptics_set_disable_gesture); 1441 1442 static void synaptics_disconnect(struct psmouse *psmouse) 1443 { 1444 struct synaptics_data *priv = psmouse->private; 1445 1446 /* 1447 * We might have left a breadcrumb when trying to 1448 * set up SMbus companion. 1449 */ 1450 psmouse_smbus_cleanup(psmouse); 1451 1452 if (!priv->absolute_mode && 1453 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1454 device_remove_file(&psmouse->ps2dev.serio->dev, 1455 &psmouse_attr_disable_gesture.dattr); 1456 1457 synaptics_reset(psmouse); 1458 kfree(priv); 1459 psmouse->private = NULL; 1460 } 1461 1462 static int synaptics_reconnect(struct psmouse *psmouse) 1463 { 1464 struct synaptics_data *priv = psmouse->private; 1465 struct synaptics_device_info info; 1466 u8 param[2]; 1467 int retry = 0; 1468 int error; 1469 1470 do { 1471 psmouse_reset(psmouse); 1472 if (retry) { 1473 /* 1474 * On some boxes, right after resuming, the touchpad 1475 * needs some time to finish initializing (I assume 1476 * it needs time to calibrate) and start responding 1477 * to Synaptics-specific queries, so let's wait a 1478 * bit. 1479 */ 1480 ssleep(1); 1481 } 1482 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1483 error = synaptics_detect(psmouse, 0); 1484 } while (error && ++retry < 3); 1485 1486 if (error) 1487 return error; 1488 1489 if (retry > 1) 1490 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1491 1492 error = synaptics_query_hardware(psmouse, &info); 1493 if (error) { 1494 psmouse_err(psmouse, "Unable to query device.\n"); 1495 return error; 1496 } 1497 1498 error = synaptics_set_mode(psmouse); 1499 if (error) { 1500 psmouse_err(psmouse, "Unable to initialize device.\n"); 1501 return error; 1502 } 1503 1504 if (info.identity != priv->info.identity || 1505 info.model_id != priv->info.model_id || 1506 info.capabilities != priv->info.capabilities || 1507 info.ext_cap != priv->info.ext_cap) { 1508 psmouse_err(psmouse, 1509 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1510 priv->info.identity, info.identity, 1511 priv->info.model_id, info.model_id, 1512 priv->info.capabilities, info.capabilities, 1513 priv->info.ext_cap, info.ext_cap); 1514 return -ENXIO; 1515 } 1516 1517 return 0; 1518 } 1519 1520 static bool impaired_toshiba_kbc; 1521 1522 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1523 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1524 { 1525 /* Toshiba Satellite */ 1526 .matches = { 1527 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1528 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1529 }, 1530 }, 1531 { 1532 /* Toshiba Dynabook */ 1533 .matches = { 1534 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1535 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1536 }, 1537 }, 1538 { 1539 /* Toshiba Portege M300 */ 1540 .matches = { 1541 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1542 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1543 }, 1544 1545 }, 1546 { 1547 /* Toshiba Portege M300 */ 1548 .matches = { 1549 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1550 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1551 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1552 }, 1553 1554 }, 1555 #endif 1556 { } 1557 }; 1558 1559 static bool broken_olpc_ec; 1560 1561 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1562 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1563 { 1564 /* OLPC XO-1 or XO-1.5 */ 1565 .matches = { 1566 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1567 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1568 }, 1569 }, 1570 #endif 1571 { } 1572 }; 1573 1574 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1575 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1576 { 1577 /* Cr-48 Chromebook (Codename Mario) */ 1578 .matches = { 1579 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1580 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1581 }, 1582 }, 1583 #endif 1584 { } 1585 }; 1586 1587 void __init synaptics_module_init(void) 1588 { 1589 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1590 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1591 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1592 } 1593 1594 static int synaptics_init_ps2(struct psmouse *psmouse, 1595 struct synaptics_device_info *info, 1596 bool absolute_mode) 1597 { 1598 struct synaptics_data *priv; 1599 int err; 1600 1601 synaptics_apply_quirks(psmouse, info); 1602 1603 psmouse->private = priv = kzalloc_obj(*priv); 1604 if (!priv) 1605 return -ENOMEM; 1606 1607 priv->info = *info; 1608 priv->absolute_mode = absolute_mode; 1609 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1610 priv->disable_gesture = true; 1611 1612 /* 1613 * Unfortunately ForcePad capability is not exported over PS/2, 1614 * so we have to resort to checking PNP IDs. 1615 */ 1616 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1617 1618 err = synaptics_set_mode(psmouse); 1619 if (err) { 1620 psmouse_err(psmouse, "Unable to initialize device.\n"); 1621 goto init_fail; 1622 } 1623 1624 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1625 SYN_NEWABS : SYN_OLDABS; 1626 1627 psmouse_info(psmouse, 1628 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1629 SYN_ID_MODEL(info->identity), 1630 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1631 info->model_id, 1632 info->capabilities, info->ext_cap, info->ext_cap_0c, 1633 info->ext_cap_10, info->board_id, info->firmware_id); 1634 1635 err = set_input_params(psmouse, priv); 1636 if (err) { 1637 psmouse_err(psmouse, 1638 "failed to set up capabilities: %d\n", err); 1639 goto init_fail; 1640 } 1641 1642 /* 1643 * Encode touchpad model so that it can be used to set 1644 * input device->id.version and be visible to userspace. 1645 * Because version is __u16 we have to drop something. 1646 * Hardware info bits seem to be good candidates as they 1647 * are documented to be for Synaptics corp. internal use. 1648 */ 1649 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1650 (info->model_id & 0x000000ff); 1651 1652 if (absolute_mode) { 1653 psmouse->protocol_handler = synaptics_process_byte; 1654 psmouse->pktsize = 6; 1655 } else { 1656 /* Relative mode follows standard PS/2 mouse protocol */ 1657 psmouse->protocol_handler = psmouse_process_byte; 1658 psmouse->pktsize = 3; 1659 } 1660 1661 psmouse->set_rate = synaptics_set_rate; 1662 psmouse->disconnect = synaptics_disconnect; 1663 psmouse->reconnect = synaptics_reconnect; 1664 psmouse->fast_reconnect = NULL; 1665 psmouse->cleanup = synaptics_reset; 1666 /* Synaptics can usually stay in sync without extra help */ 1667 psmouse->resync_time = 0; 1668 1669 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1670 synaptics_pt_create(psmouse); 1671 1672 /* 1673 * Toshiba's KBC seems to have trouble handling data from 1674 * Synaptics at full rate. Switch to a lower rate (roughly 1675 * the same rate as a standard PS/2 mouse). 1676 */ 1677 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1678 psmouse_info(psmouse, 1679 "Toshiba %s detected, limiting rate to 40pps.\n", 1680 dmi_get_system_info(DMI_PRODUCT_NAME)); 1681 psmouse->rate = 40; 1682 } 1683 1684 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1685 err = device_create_file(&psmouse->ps2dev.serio->dev, 1686 &psmouse_attr_disable_gesture.dattr); 1687 if (err) { 1688 psmouse_err(psmouse, 1689 "Failed to create disable_gesture attribute (%d)", 1690 err); 1691 goto init_fail; 1692 } 1693 } 1694 1695 return 0; 1696 1697 init_fail: 1698 kfree(priv); 1699 return err; 1700 } 1701 1702 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1703 { 1704 struct synaptics_device_info info; 1705 int error; 1706 1707 psmouse_reset(psmouse); 1708 1709 error = synaptics_query_hardware(psmouse, &info); 1710 if (error) { 1711 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1712 return error; 1713 } 1714 1715 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1716 } 1717 1718 int synaptics_init_absolute(struct psmouse *psmouse) 1719 { 1720 return __synaptics_init(psmouse, true); 1721 } 1722 1723 int synaptics_init_relative(struct psmouse *psmouse) 1724 { 1725 return __synaptics_init(psmouse, false); 1726 } 1727 1728 static int synaptics_setup_ps2(struct psmouse *psmouse, 1729 struct synaptics_device_info *info) 1730 { 1731 bool absolute_mode = true; 1732 int error; 1733 1734 /* 1735 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1736 * packet spew overloads the EC such that key presses on the keyboard 1737 * are missed. Given that, don't even attempt to use Absolute mode. 1738 * Relative mode seems to work just fine. 1739 */ 1740 if (broken_olpc_ec) { 1741 psmouse_info(psmouse, 1742 "OLPC XO detected, forcing relative protocol.\n"); 1743 absolute_mode = false; 1744 } 1745 1746 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1747 if (error) 1748 return error; 1749 1750 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1751 } 1752 1753 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1754 1755 void __init synaptics_module_init(void) 1756 { 1757 } 1758 1759 static int __maybe_unused 1760 synaptics_setup_ps2(struct psmouse *psmouse, 1761 struct synaptics_device_info *info) 1762 { 1763 return -ENOSYS; 1764 } 1765 1766 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1767 1768 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1769 1770 /* 1771 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1772 * provides a better bandwidth and allow a better control of the touchpads. 1773 * This is used to decide if we need to use this bus or not. 1774 */ 1775 enum { 1776 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1777 SYNAPTICS_INTERTOUCH_OFF, 1778 SYNAPTICS_INTERTOUCH_ON, 1779 }; 1780 1781 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1782 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1783 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1784 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1785 1786 static int synaptics_create_intertouch(struct psmouse *psmouse, 1787 struct synaptics_device_info *info, 1788 bool leave_breadcrumbs) 1789 { 1790 bool topbuttonpad = 1791 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1792 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1793 const struct rmi_device_platform_data pdata = { 1794 .reset_delay_ms = 30, 1795 .sensor_pdata = { 1796 .sensor_type = rmi_sensor_touchpad, 1797 .axis_align.flip_y = true, 1798 .kernel_tracking = false, 1799 .topbuttonpad = topbuttonpad, 1800 }, 1801 .gpio_data = { 1802 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1803 .trackstick_buttons = 1804 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1805 }, 1806 }; 1807 const struct i2c_board_info intertouch_board = { 1808 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1809 .flags = I2C_CLIENT_HOST_NOTIFY, 1810 }; 1811 1812 return psmouse_smbus_init(psmouse, &intertouch_board, 1813 &pdata, sizeof(pdata), true, 1814 leave_breadcrumbs); 1815 } 1816 1817 /* 1818 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1819 * and decides to instantiate a SMBus InterTouch device. 1820 */ 1821 static int synaptics_setup_intertouch(struct psmouse *psmouse, 1822 struct synaptics_device_info *info, 1823 bool leave_breadcrumbs) 1824 { 1825 int error; 1826 1827 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1828 return -ENXIO; 1829 1830 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1831 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1832 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1833 1834 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1835 psmouse_info(psmouse, 1836 "Your touchpad (%s) says it can support a different bus. " 1837 "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", 1838 psmouse->ps2dev.serio->firmware_id); 1839 1840 return -ENXIO; 1841 } 1842 1843 /* Disable intertouch on known-broken T440p board revisions */ 1844 if (info->board_id == 2722 && 1845 psmouse_matches_pnp_id(psmouse, 1846 (const char * const []){"LEN0036", NULL})) { 1847 psmouse_info(psmouse, 1848 "Disabling intertouch for board id %u\n", 1849 info->board_id); 1850 return -ENXIO; 1851 } 1852 } 1853 1854 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1855 1856 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1857 if (error) { 1858 if (error == -EAGAIN) 1859 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1860 else 1861 psmouse_err(psmouse, "unable to create intertouch device\n"); 1862 1863 return error; 1864 } 1865 1866 return 0; 1867 } 1868 1869 int synaptics_init_smbus(struct psmouse *psmouse) 1870 { 1871 struct synaptics_device_info info; 1872 int error; 1873 1874 psmouse_reset(psmouse); 1875 1876 error = synaptics_query_hardware(psmouse, &info); 1877 if (error) { 1878 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1879 return error; 1880 } 1881 1882 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1883 return -ENXIO; 1884 1885 return synaptics_create_intertouch(psmouse, &info, false); 1886 } 1887 1888 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1889 1890 static int __maybe_unused 1891 synaptics_setup_intertouch(struct psmouse *psmouse, 1892 struct synaptics_device_info *info, 1893 bool leave_breadcrumbs) 1894 { 1895 return -ENOSYS; 1896 } 1897 1898 int synaptics_init_smbus(struct psmouse *psmouse) 1899 { 1900 return -ENOSYS; 1901 } 1902 1903 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1904 1905 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1906 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1907 1908 int synaptics_init(struct psmouse *psmouse) 1909 { 1910 struct synaptics_device_info info; 1911 int error; 1912 int retval; 1913 1914 psmouse_reset(psmouse); 1915 1916 error = synaptics_query_hardware(psmouse, &info); 1917 if (error) { 1918 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1919 return error; 1920 } 1921 1922 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1923 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1924 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1925 /* Forcepads need F21, which is not ready */ 1926 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1927 psmouse_warn(psmouse, 1928 "The touchpad can support a better bus than the too old PS/2 protocol. " 1929 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1930 } 1931 1932 error = synaptics_setup_intertouch(psmouse, &info, true); 1933 if (!error) 1934 return PSMOUSE_SYNAPTICS_SMBUS; 1935 } 1936 1937 retval = synaptics_setup_ps2(psmouse, &info); 1938 if (retval < 0) { 1939 /* 1940 * Not using any flavor of Synaptics support, so clean up 1941 * SMbus breadcrumbs, if any. 1942 */ 1943 psmouse_smbus_cleanup(psmouse); 1944 } 1945 1946 return retval; 1947 } 1948 1949 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1950 1951 int synaptics_init(struct psmouse *psmouse) 1952 { 1953 return -ENOSYS; 1954 } 1955 1956 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1957