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