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 static const char * const smbus_pnp_ids[] = { 165 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */ 166 "LEN0048", /* X1 Carbon 3 */ 167 "LEN0046", /* X250 */ 168 "LEN0049", /* Yoga 11e */ 169 "LEN004a", /* W541 */ 170 "LEN005b", /* P50 */ 171 "LEN005e", /* T560 */ 172 "LEN006c", /* T470s */ 173 "LEN0071", /* T480 */ 174 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 175 "LEN0073", /* X1 Carbon G5 (Elantech) */ 176 "LEN0091", /* X1 Carbon 6 */ 177 "LEN0092", /* X1 Carbon 6 */ 178 "LEN0093", /* T480 */ 179 "LEN0096", /* X280 */ 180 "LEN0097", /* X280 -> ALPS trackpoint */ 181 "LEN009b", /* T580 */ 182 "LEN200f", /* T450s */ 183 "LEN2044", /* L470 */ 184 "LEN2054", /* E480 */ 185 "LEN2055", /* E580 */ 186 "SYN3052", /* HP EliteBook 840 G4 */ 187 "SYN3221", /* HP 15-ay000 */ 188 "SYN323d", /* HP Spectre X360 13-w013dx */ 189 NULL 190 }; 191 192 static const char * const forcepad_pnp_ids[] = { 193 "SYN300D", 194 "SYN3014", 195 NULL 196 }; 197 198 /* 199 * Send a command to the synaptics touchpad by special commands 200 */ 201 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 202 { 203 int error; 204 205 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 206 if (error) 207 return error; 208 209 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 210 if (error) 211 return error; 212 213 return 0; 214 } 215 216 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 217 { 218 int error; 219 union { 220 __be32 be_val; 221 char buf[4]; 222 } resp = { 0 }; 223 224 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 225 if (error) 226 return error; 227 228 *val = be32_to_cpu(resp.be_val); 229 return 0; 230 } 231 232 /* 233 * Identify Touchpad 234 * See also the SYN_ID_* macros 235 */ 236 static int synaptics_identify(struct psmouse *psmouse, 237 struct synaptics_device_info *info) 238 { 239 int error; 240 241 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 242 if (error) 243 return error; 244 245 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 246 } 247 248 /* 249 * Read the model-id bytes from the touchpad 250 * see also SYN_MODEL_* macros 251 */ 252 static int synaptics_model_id(struct psmouse *psmouse, 253 struct synaptics_device_info *info) 254 { 255 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 256 } 257 258 /* 259 * Read the firmware id from the touchpad 260 */ 261 static int synaptics_firmware_id(struct psmouse *psmouse, 262 struct synaptics_device_info *info) 263 { 264 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 265 &info->firmware_id); 266 } 267 268 /* 269 * Read the board id and the "More Extended Queries" from the touchpad 270 * The board id is encoded in the "QUERY MODES" response 271 */ 272 static int synaptics_query_modes(struct psmouse *psmouse, 273 struct synaptics_device_info *info) 274 { 275 u8 bid[3]; 276 int error; 277 278 /* firmwares prior 7.5 have no board_id encoded */ 279 if (SYN_ID_FULL(info->identity) < 0x705) 280 return 0; 281 282 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 283 if (error) 284 return error; 285 286 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 287 288 if (SYN_MEXT_CAP_BIT(bid[0])) 289 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 290 &info->ext_cap_10); 291 292 return 0; 293 } 294 295 /* 296 * Read the capability-bits from the touchpad 297 * see also the SYN_CAP_* macros 298 */ 299 static int synaptics_capability(struct psmouse *psmouse, 300 struct synaptics_device_info *info) 301 { 302 int error; 303 304 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 305 &info->capabilities); 306 if (error) 307 return error; 308 309 info->ext_cap = info->ext_cap_0c = 0; 310 311 /* 312 * Older firmwares had submodel ID fixed to 0x47 313 */ 314 if (SYN_ID_FULL(info->identity) < 0x705 && 315 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 316 return -ENXIO; 317 } 318 319 /* 320 * Unless capExtended is set the rest of the flags should be ignored 321 */ 322 if (!SYN_CAP_EXTENDED(info->capabilities)) 323 info->capabilities = 0; 324 325 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 326 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 327 &info->ext_cap); 328 if (error) { 329 psmouse_warn(psmouse, 330 "device claims to have extended capabilities, but I'm not able to read them.\n"); 331 } else { 332 /* 333 * if nExtBtn is greater than 8 it should be considered 334 * invalid and treated as 0 335 */ 336 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 337 info->ext_cap &= ~SYN_CAP_MB_MASK; 338 } 339 } 340 341 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 342 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 343 &info->ext_cap_0c); 344 if (error) 345 psmouse_warn(psmouse, 346 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 347 } 348 349 return 0; 350 } 351 352 /* 353 * Read touchpad resolution and maximum reported coordinates 354 * Resolution is left zero if touchpad does not support the query 355 */ 356 static int synaptics_resolution(struct psmouse *psmouse, 357 struct synaptics_device_info *info) 358 { 359 u8 resp[3]; 360 int error; 361 362 if (SYN_ID_MAJOR(info->identity) < 4) 363 return 0; 364 365 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 366 if (!error) { 367 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 368 info->x_res = resp[0]; /* x resolution in units/mm */ 369 info->y_res = resp[2]; /* y resolution in units/mm */ 370 } 371 } 372 373 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 374 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 375 error = synaptics_send_cmd(psmouse, 376 SYN_QUE_EXT_MAX_COORDS, resp); 377 if (error) { 378 psmouse_warn(psmouse, 379 "device claims to have max coordinates query, but I'm not able to read it.\n"); 380 } else { 381 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 382 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 383 psmouse_info(psmouse, 384 "queried max coordinates: x [..%d], y [..%d]\n", 385 info->x_max, info->y_max); 386 } 387 } 388 389 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 390 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 391 /* 392 * Firmware v8.1 does not report proper number of extended 393 * capabilities, but has been proven to report correct min 394 * coordinates. 395 */ 396 SYN_ID_FULL(info->identity) == 0x801)) { 397 error = synaptics_send_cmd(psmouse, 398 SYN_QUE_EXT_MIN_COORDS, resp); 399 if (error) { 400 psmouse_warn(psmouse, 401 "device claims to have min coordinates query, but I'm not able to read it.\n"); 402 } else { 403 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 404 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 405 psmouse_info(psmouse, 406 "queried min coordinates: x [%d..], y [%d..]\n", 407 info->x_min, info->y_min); 408 } 409 } 410 411 return 0; 412 } 413 414 static int synaptics_query_hardware(struct psmouse *psmouse, 415 struct synaptics_device_info *info) 416 { 417 int error; 418 419 memset(info, 0, sizeof(*info)); 420 421 error = synaptics_identify(psmouse, info); 422 if (error) 423 return error; 424 425 error = synaptics_model_id(psmouse, info); 426 if (error) 427 return error; 428 429 error = synaptics_firmware_id(psmouse, info); 430 if (error) 431 return error; 432 433 error = synaptics_query_modes(psmouse, info); 434 if (error) 435 return error; 436 437 error = synaptics_capability(psmouse, info); 438 if (error) 439 return error; 440 441 error = synaptics_resolution(psmouse, info); 442 if (error) 443 return error; 444 445 return 0; 446 } 447 448 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 449 450 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 451 452 static bool cr48_profile_sensor; 453 454 #define ANY_BOARD_ID 0 455 struct min_max_quirk { 456 const char * const *pnp_ids; 457 struct { 458 u32 min, max; 459 } board_id; 460 u32 x_min, x_max, y_min, y_max; 461 }; 462 463 static const struct min_max_quirk min_max_pnpid_table[] = { 464 { 465 (const char * const []){"LEN0033", NULL}, 466 {ANY_BOARD_ID, ANY_BOARD_ID}, 467 1024, 5052, 2258, 4832 468 }, 469 { 470 (const char * const []){"LEN0042", NULL}, 471 {ANY_BOARD_ID, ANY_BOARD_ID}, 472 1232, 5710, 1156, 4696 473 }, 474 { 475 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 476 "LEN0039", "LEN2002", "LEN2004", 477 NULL}, 478 {ANY_BOARD_ID, 2961}, 479 1024, 5112, 2024, 4832 480 }, 481 { 482 (const char * const []){"LEN2000", NULL}, 483 {ANY_BOARD_ID, ANY_BOARD_ID}, 484 1024, 5113, 2021, 4832 485 }, 486 { 487 (const char * const []){"LEN2001", NULL}, 488 {ANY_BOARD_ID, ANY_BOARD_ID}, 489 1024, 5022, 2508, 4832 490 }, 491 { 492 (const char * const []){"LEN2006", NULL}, 493 {2691, 2691}, 494 1024, 5045, 2457, 4832 495 }, 496 { 497 (const char * const []){"LEN2006", NULL}, 498 {ANY_BOARD_ID, ANY_BOARD_ID}, 499 1264, 5675, 1171, 4688 500 }, 501 { } 502 }; 503 504 /***************************************************************************** 505 * Synaptics communications functions 506 ****************************************************************************/ 507 508 /* 509 * Synaptics touchpads report the y coordinate from bottom to top, which is 510 * opposite from what userspace expects. 511 * This function is used to invert y before reporting. 512 */ 513 static int synaptics_invert_y(int y) 514 { 515 return YMAX_NOMINAL + YMIN_NOMINAL - y; 516 } 517 518 /* 519 * Apply quirk(s) if the hardware matches 520 */ 521 static void synaptics_apply_quirks(struct psmouse *psmouse, 522 struct synaptics_device_info *info) 523 { 524 int i; 525 526 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 527 if (!psmouse_matches_pnp_id(psmouse, 528 min_max_pnpid_table[i].pnp_ids)) 529 continue; 530 531 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 532 info->board_id < min_max_pnpid_table[i].board_id.min) 533 continue; 534 535 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 536 info->board_id > min_max_pnpid_table[i].board_id.max) 537 continue; 538 539 info->x_min = min_max_pnpid_table[i].x_min; 540 info->x_max = min_max_pnpid_table[i].x_max; 541 info->y_min = min_max_pnpid_table[i].y_min; 542 info->y_max = min_max_pnpid_table[i].y_max; 543 psmouse_info(psmouse, 544 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 545 info->x_min, info->x_max, 546 info->y_min, info->y_max); 547 break; 548 } 549 } 550 551 static bool synaptics_has_agm(struct synaptics_data *priv) 552 { 553 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 554 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 555 } 556 557 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 558 { 559 static u8 param = 0xc8; 560 int error; 561 562 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 563 if (error) 564 return error; 565 566 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 567 if (error) 568 return error; 569 570 return 0; 571 } 572 573 static int synaptics_set_mode(struct psmouse *psmouse) 574 { 575 struct synaptics_data *priv = psmouse->private; 576 int error; 577 578 priv->mode = 0; 579 if (priv->absolute_mode) 580 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 581 if (priv->disable_gesture) 582 priv->mode |= SYN_BIT_DISABLE_GESTURE; 583 if (psmouse->rate >= 80) 584 priv->mode |= SYN_BIT_HIGH_RATE; 585 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 586 priv->mode |= SYN_BIT_W_MODE; 587 588 error = synaptics_mode_cmd(psmouse, priv->mode); 589 if (error) 590 return error; 591 592 if (priv->absolute_mode && synaptics_has_agm(priv)) { 593 error = synaptics_set_advanced_gesture_mode(psmouse); 594 if (error) { 595 psmouse_err(psmouse, 596 "Advanced gesture mode init failed: %d\n", 597 error); 598 return error; 599 } 600 } 601 602 return 0; 603 } 604 605 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 606 { 607 struct synaptics_data *priv = psmouse->private; 608 609 if (rate >= 80) { 610 priv->mode |= SYN_BIT_HIGH_RATE; 611 psmouse->rate = 80; 612 } else { 613 priv->mode &= ~SYN_BIT_HIGH_RATE; 614 psmouse->rate = 40; 615 } 616 617 synaptics_mode_cmd(psmouse, priv->mode); 618 } 619 620 /***************************************************************************** 621 * Synaptics pass-through PS/2 port support 622 ****************************************************************************/ 623 static int synaptics_pt_write(struct serio *serio, u8 c) 624 { 625 struct psmouse *parent = serio_get_drvdata(serio->parent); 626 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 627 int error; 628 629 error = ps2_sliced_command(&parent->ps2dev, c); 630 if (error) 631 return error; 632 633 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 634 if (error) 635 return error; 636 637 return 0; 638 } 639 640 static int synaptics_pt_start(struct serio *serio) 641 { 642 struct psmouse *parent = serio_get_drvdata(serio->parent); 643 struct synaptics_data *priv = parent->private; 644 645 serio_pause_rx(parent->ps2dev.serio); 646 priv->pt_port = serio; 647 serio_continue_rx(parent->ps2dev.serio); 648 649 return 0; 650 } 651 652 static void synaptics_pt_stop(struct serio *serio) 653 { 654 struct psmouse *parent = serio_get_drvdata(serio->parent); 655 struct synaptics_data *priv = parent->private; 656 657 serio_pause_rx(parent->ps2dev.serio); 658 priv->pt_port = NULL; 659 serio_continue_rx(parent->ps2dev.serio); 660 } 661 662 static int synaptics_is_pt_packet(u8 *buf) 663 { 664 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 665 } 666 667 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet) 668 { 669 struct psmouse *child = serio_get_drvdata(ptport); 670 671 if (child && child->state == PSMOUSE_ACTIVATED) { 672 serio_interrupt(ptport, packet[1], 0); 673 serio_interrupt(ptport, packet[4], 0); 674 serio_interrupt(ptport, packet[5], 0); 675 if (child->pktsize == 4) 676 serio_interrupt(ptport, packet[2], 0); 677 } else { 678 serio_interrupt(ptport, packet[1], 0); 679 } 680 } 681 682 static void synaptics_pt_activate(struct psmouse *psmouse) 683 { 684 struct synaptics_data *priv = psmouse->private; 685 struct psmouse *child = serio_get_drvdata(priv->pt_port); 686 687 /* adjust the touchpad to child's choice of protocol */ 688 if (child) { 689 if (child->pktsize == 4) 690 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 691 else 692 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 693 694 if (synaptics_mode_cmd(psmouse, priv->mode)) 695 psmouse_warn(psmouse, 696 "failed to switch guest protocol\n"); 697 } 698 } 699 700 static void synaptics_pt_create(struct psmouse *psmouse) 701 { 702 struct serio *serio; 703 704 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 705 if (!serio) { 706 psmouse_err(psmouse, 707 "not enough memory for pass-through port\n"); 708 return; 709 } 710 711 serio->id.type = SERIO_PS_PSTHRU; 712 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 713 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 714 serio->write = synaptics_pt_write; 715 serio->start = synaptics_pt_start; 716 serio->stop = synaptics_pt_stop; 717 serio->parent = psmouse->ps2dev.serio; 718 719 psmouse->pt_activate = synaptics_pt_activate; 720 721 psmouse_info(psmouse, "serio: %s port at %s\n", 722 serio->name, psmouse->phys); 723 serio_register_port(serio); 724 } 725 726 /***************************************************************************** 727 * Functions to interpret the absolute mode packets 728 ****************************************************************************/ 729 730 static void synaptics_parse_agm(const u8 buf[], 731 struct synaptics_data *priv, 732 struct synaptics_hw_state *hw) 733 { 734 struct synaptics_hw_state *agm = &priv->agm; 735 int agm_packet_type; 736 737 agm_packet_type = (buf[5] & 0x30) >> 4; 738 switch (agm_packet_type) { 739 case 1: 740 /* Gesture packet: (x, y, z) half resolution */ 741 agm->w = hw->w; 742 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 743 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 744 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 745 break; 746 747 case 2: 748 /* AGM-CONTACT packet: we are only interested in the count */ 749 priv->agm_count = buf[1]; 750 break; 751 752 default: 753 break; 754 } 755 } 756 757 static void synaptics_parse_ext_buttons(const u8 buf[], 758 struct synaptics_data *priv, 759 struct synaptics_hw_state *hw) 760 { 761 unsigned int ext_bits = 762 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 763 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 764 765 hw->ext_buttons = buf[4] & ext_mask; 766 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 767 } 768 769 static int synaptics_parse_hw_state(const u8 buf[], 770 struct synaptics_data *priv, 771 struct synaptics_hw_state *hw) 772 { 773 memset(hw, 0, sizeof(struct synaptics_hw_state)); 774 775 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 776 hw->w = (((buf[0] & 0x30) >> 2) | 777 ((buf[0] & 0x04) >> 1) | 778 ((buf[3] & 0x04) >> 2)); 779 780 if (synaptics_has_agm(priv) && hw->w == 2) { 781 synaptics_parse_agm(buf, priv, hw); 782 return 1; 783 } 784 785 hw->x = (((buf[3] & 0x10) << 8) | 786 ((buf[1] & 0x0f) << 8) | 787 buf[4]); 788 hw->y = (((buf[3] & 0x20) << 7) | 789 ((buf[1] & 0xf0) << 4) | 790 buf[5]); 791 hw->z = buf[2]; 792 793 hw->left = (buf[0] & 0x01) ? 1 : 0; 794 hw->right = (buf[0] & 0x02) ? 1 : 0; 795 796 if (priv->is_forcepad) { 797 /* 798 * ForcePads, like Clickpads, use middle button 799 * bits to report primary button clicks. 800 * Unfortunately they report primary button not 801 * only when user presses on the pad above certain 802 * threshold, but also when there are more than one 803 * finger on the touchpad, which interferes with 804 * out multi-finger gestures. 805 */ 806 if (hw->z == 0) { 807 /* No contacts */ 808 priv->press = priv->report_press = false; 809 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 810 /* 811 * Single-finger touch with pressure above 812 * the threshold. If pressure stays long 813 * enough, we'll start reporting primary 814 * button. We rely on the device continuing 815 * sending data even if finger does not 816 * move. 817 */ 818 if (!priv->press) { 819 priv->press_start = jiffies; 820 priv->press = true; 821 } else if (time_after(jiffies, 822 priv->press_start + 823 msecs_to_jiffies(50))) { 824 priv->report_press = true; 825 } 826 } else { 827 priv->press = false; 828 } 829 830 hw->left = priv->report_press; 831 832 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 833 /* 834 * Clickpad's button is transmitted as middle button, 835 * however, since it is primary button, we will report 836 * it as BTN_LEFT. 837 */ 838 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 839 840 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 841 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 842 if (hw->w == 2) 843 hw->scroll = (s8)buf[1]; 844 } 845 846 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 847 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 848 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 849 } 850 851 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 852 ((buf[0] ^ buf[3]) & 0x02)) { 853 synaptics_parse_ext_buttons(buf, priv, hw); 854 } 855 } else { 856 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 857 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 858 859 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 860 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 861 862 hw->left = (buf[0] & 0x01) ? 1 : 0; 863 hw->right = (buf[0] & 0x02) ? 1 : 0; 864 } 865 866 /* 867 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 868 * is used by some firmware to indicate a finger at the edge of 869 * the touchpad whose precise position cannot be determined, so 870 * convert these values to the maximum axis value. 871 */ 872 if (hw->x > X_MAX_POSITIVE) 873 hw->x -= 1 << ABS_POS_BITS; 874 else if (hw->x == X_MAX_POSITIVE) 875 hw->x = XMAX; 876 877 if (hw->y > Y_MAX_POSITIVE) 878 hw->y -= 1 << ABS_POS_BITS; 879 else if (hw->y == Y_MAX_POSITIVE) 880 hw->y = YMAX; 881 882 return 0; 883 } 884 885 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 886 bool active, int x, int y) 887 { 888 input_mt_slot(dev, slot); 889 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 890 if (active) { 891 input_report_abs(dev, ABS_MT_POSITION_X, x); 892 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 893 } 894 } 895 896 static void synaptics_report_semi_mt_data(struct input_dev *dev, 897 const struct synaptics_hw_state *a, 898 const struct synaptics_hw_state *b, 899 int num_fingers) 900 { 901 if (num_fingers >= 2) { 902 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 903 min(a->y, b->y)); 904 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 905 max(a->y, b->y)); 906 } else if (num_fingers == 1) { 907 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 908 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 909 } else { 910 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 911 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 912 } 913 } 914 915 static void synaptics_report_ext_buttons(struct psmouse *psmouse, 916 const struct synaptics_hw_state *hw) 917 { 918 struct input_dev *dev = psmouse->dev; 919 struct synaptics_data *priv = psmouse->private; 920 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 921 int i; 922 923 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 924 return; 925 926 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 927 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 928 SYN_ID_FULL(priv->info.identity) == 0x802) && 929 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 930 return; 931 932 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 933 for (i = 0; i < ext_bits; i++) { 934 input_report_key(dev, BTN_0 + 2 * i, 935 hw->ext_buttons & BIT(i)); 936 input_report_key(dev, BTN_1 + 2 * i, 937 hw->ext_buttons & BIT(i + ext_bits)); 938 } 939 return; 940 } 941 942 /* 943 * This generation of touchpads has the trackstick buttons 944 * physically wired to the touchpad. Re-route them through 945 * the pass-through interface. 946 */ 947 if (priv->pt_port) { 948 u8 pt_buttons; 949 950 /* The trackstick expects at most 3 buttons */ 951 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 952 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 953 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 954 955 serio_interrupt(priv->pt_port, 956 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 957 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 958 } 959 } 960 961 static void synaptics_report_buttons(struct psmouse *psmouse, 962 const struct synaptics_hw_state *hw) 963 { 964 struct input_dev *dev = psmouse->dev; 965 struct synaptics_data *priv = psmouse->private; 966 967 input_report_key(dev, BTN_LEFT, hw->left); 968 input_report_key(dev, BTN_RIGHT, hw->right); 969 970 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 971 input_report_key(dev, BTN_MIDDLE, hw->middle); 972 973 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 974 input_report_key(dev, BTN_FORWARD, hw->up); 975 input_report_key(dev, BTN_BACK, hw->down); 976 } 977 978 synaptics_report_ext_buttons(psmouse, hw); 979 } 980 981 static void synaptics_report_mt_data(struct psmouse *psmouse, 982 const struct synaptics_hw_state *sgm, 983 int num_fingers) 984 { 985 struct input_dev *dev = psmouse->dev; 986 struct synaptics_data *priv = psmouse->private; 987 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 988 struct input_mt_pos pos[2]; 989 int slot[2], nsemi, i; 990 991 nsemi = clamp_val(num_fingers, 0, 2); 992 993 for (i = 0; i < nsemi; i++) { 994 pos[i].x = hw[i]->x; 995 pos[i].y = synaptics_invert_y(hw[i]->y); 996 } 997 998 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 999 1000 for (i = 0; i < nsemi; i++) { 1001 input_mt_slot(dev, slot[i]); 1002 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1003 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1004 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1005 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1006 } 1007 1008 input_mt_drop_unused(dev); 1009 1010 /* Don't use active slot count to generate BTN_TOOL events. */ 1011 input_mt_report_pointer_emulation(dev, false); 1012 1013 /* Send the number of fingers reported by touchpad itself. */ 1014 input_mt_report_finger_count(dev, num_fingers); 1015 1016 synaptics_report_buttons(psmouse, sgm); 1017 1018 input_sync(dev); 1019 } 1020 1021 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1022 struct synaptics_hw_state *sgm) 1023 { 1024 struct synaptics_data *priv = psmouse->private; 1025 int num_fingers; 1026 1027 /* 1028 * Update mt_state using the new finger count and current mt_state. 1029 */ 1030 if (sgm->z == 0) 1031 num_fingers = 0; 1032 else if (sgm->w >= 4) 1033 num_fingers = 1; 1034 else if (sgm->w == 0) 1035 num_fingers = 2; 1036 else if (sgm->w == 1) 1037 num_fingers = priv->agm_count ? priv->agm_count : 3; 1038 else 1039 num_fingers = 4; 1040 1041 /* Send resulting input events to user space */ 1042 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1043 } 1044 1045 static bool synaptics_has_multifinger(struct synaptics_data *priv) 1046 { 1047 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1048 return true; 1049 1050 /* Advanced gesture mode also sends multi finger data */ 1051 return synaptics_has_agm(priv); 1052 } 1053 1054 /* 1055 * called for each full received packet from the touchpad 1056 */ 1057 static void synaptics_process_packet(struct psmouse *psmouse) 1058 { 1059 struct input_dev *dev = psmouse->dev; 1060 struct synaptics_data *priv = psmouse->private; 1061 struct synaptics_device_info *info = &priv->info; 1062 struct synaptics_hw_state hw; 1063 int num_fingers; 1064 int finger_width; 1065 1066 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1067 return; 1068 1069 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1070 synaptics_image_sensor_process(psmouse, &hw); 1071 return; 1072 } 1073 1074 if (hw.scroll) { 1075 priv->scroll += hw.scroll; 1076 1077 while (priv->scroll >= 4) { 1078 input_report_key(dev, BTN_BACK, !hw.down); 1079 input_sync(dev); 1080 input_report_key(dev, BTN_BACK, hw.down); 1081 input_sync(dev); 1082 priv->scroll -= 4; 1083 } 1084 while (priv->scroll <= -4) { 1085 input_report_key(dev, BTN_FORWARD, !hw.up); 1086 input_sync(dev); 1087 input_report_key(dev, BTN_FORWARD, hw.up); 1088 input_sync(dev); 1089 priv->scroll += 4; 1090 } 1091 return; 1092 } 1093 1094 if (hw.z > 0 && hw.x > 1) { 1095 num_fingers = 1; 1096 finger_width = 5; 1097 if (SYN_CAP_EXTENDED(info->capabilities)) { 1098 switch (hw.w) { 1099 case 0 ... 1: 1100 if (synaptics_has_multifinger(priv)) 1101 num_fingers = hw.w + 2; 1102 break; 1103 case 2: 1104 if (SYN_MODEL_PEN(info->model_id)) 1105 ; /* Nothing, treat a pen as a single finger */ 1106 break; 1107 case 4 ... 15: 1108 if (SYN_CAP_PALMDETECT(info->capabilities)) 1109 finger_width = hw.w; 1110 break; 1111 } 1112 } 1113 } else { 1114 num_fingers = 0; 1115 finger_width = 0; 1116 } 1117 1118 if (cr48_profile_sensor) { 1119 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1120 return; 1121 } 1122 1123 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1124 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1125 num_fingers); 1126 1127 /* Post events 1128 * BTN_TOUCH has to be first as mousedev relies on it when doing 1129 * absolute -> relative conversion 1130 */ 1131 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1132 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1133 1134 if (num_fingers > 0) { 1135 input_report_abs(dev, ABS_X, hw.x); 1136 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1137 } 1138 input_report_abs(dev, ABS_PRESSURE, hw.z); 1139 1140 if (SYN_CAP_PALMDETECT(info->capabilities)) 1141 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1142 1143 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1144 if (synaptics_has_multifinger(priv)) { 1145 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1146 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1147 } 1148 1149 synaptics_report_buttons(psmouse, &hw); 1150 1151 input_sync(dev); 1152 } 1153 1154 static bool synaptics_validate_byte(struct psmouse *psmouse, 1155 int idx, enum synaptics_pkt_type pkt_type) 1156 { 1157 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1158 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1159 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1160 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1161 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1162 const u8 *packet = psmouse->packet; 1163 1164 if (idx < 0 || idx > 4) 1165 return false; 1166 1167 switch (pkt_type) { 1168 1169 case SYN_NEWABS: 1170 case SYN_NEWABS_RELAXED: 1171 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1172 1173 case SYN_NEWABS_STRICT: 1174 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1175 1176 case SYN_OLDABS: 1177 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1178 1179 default: 1180 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1181 return false; 1182 } 1183 } 1184 1185 static enum synaptics_pkt_type 1186 synaptics_detect_pkt_type(struct psmouse *psmouse) 1187 { 1188 int i; 1189 1190 for (i = 0; i < 5; i++) { 1191 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1192 psmouse_info(psmouse, "using relaxed packet validation\n"); 1193 return SYN_NEWABS_RELAXED; 1194 } 1195 } 1196 1197 return SYN_NEWABS_STRICT; 1198 } 1199 1200 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1201 { 1202 struct synaptics_data *priv = psmouse->private; 1203 1204 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1205 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1206 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1207 1208 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1209 synaptics_is_pt_packet(psmouse->packet)) { 1210 if (priv->pt_port) 1211 synaptics_pass_pt_packet(priv->pt_port, 1212 psmouse->packet); 1213 } else 1214 synaptics_process_packet(psmouse); 1215 1216 return PSMOUSE_FULL_PACKET; 1217 } 1218 1219 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1220 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1221 } 1222 1223 /***************************************************************************** 1224 * Driver initialization/cleanup functions 1225 ****************************************************************************/ 1226 static void set_abs_position_params(struct input_dev *dev, 1227 struct synaptics_device_info *info, 1228 int x_code, int y_code) 1229 { 1230 int x_min = info->x_min ?: XMIN_NOMINAL; 1231 int x_max = info->x_max ?: XMAX_NOMINAL; 1232 int y_min = info->y_min ?: YMIN_NOMINAL; 1233 int y_max = info->y_max ?: YMAX_NOMINAL; 1234 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1235 SYN_REDUCED_FILTER_FUZZ : 0; 1236 1237 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1238 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1239 input_abs_set_res(dev, x_code, info->x_res); 1240 input_abs_set_res(dev, y_code, info->y_res); 1241 } 1242 1243 static int set_input_params(struct psmouse *psmouse, 1244 struct synaptics_data *priv) 1245 { 1246 struct input_dev *dev = psmouse->dev; 1247 struct synaptics_device_info *info = &priv->info; 1248 int i; 1249 int error; 1250 1251 /* Reset default psmouse capabilities */ 1252 __clear_bit(EV_REL, dev->evbit); 1253 bitmap_zero(dev->relbit, REL_CNT); 1254 bitmap_zero(dev->keybit, KEY_CNT); 1255 1256 /* Things that apply to both modes */ 1257 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1258 1259 input_set_capability(dev, EV_KEY, BTN_LEFT); 1260 1261 /* Clickpads report only left button */ 1262 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1263 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1264 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1265 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1266 } 1267 1268 if (!priv->absolute_mode) { 1269 /* Relative mode */ 1270 input_set_capability(dev, EV_REL, REL_X); 1271 input_set_capability(dev, EV_REL, REL_Y); 1272 return 0; 1273 } 1274 1275 /* Absolute mode */ 1276 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1277 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1278 1279 if (cr48_profile_sensor) 1280 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1281 1282 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1283 set_abs_position_params(dev, info, 1284 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1285 /* Image sensors can report per-contact pressure */ 1286 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1287 1288 error = input_mt_init_slots(dev, 2, 1289 INPUT_MT_POINTER | INPUT_MT_TRACK); 1290 if (error) 1291 return error; 1292 1293 /* Image sensors can signal 4 and 5 finger clicks */ 1294 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1295 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1296 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1297 set_abs_position_params(dev, info, 1298 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1299 /* 1300 * Profile sensor in CR-48 tracks contacts reasonably well, 1301 * other non-image sensors with AGM use semi-mt. 1302 */ 1303 error = input_mt_init_slots(dev, 2, 1304 INPUT_MT_POINTER | 1305 (cr48_profile_sensor ? 1306 INPUT_MT_TRACK : 1307 INPUT_MT_SEMI_MT)); 1308 if (error) 1309 return error; 1310 1311 /* 1312 * For semi-mt devices we send ABS_X/Y ourselves instead of 1313 * input_mt_report_pointer_emulation. But 1314 * input_mt_init_slots() resets the fuzz to 0, leading to a 1315 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1316 * position. Let's re-initialize ABS_X/Y here. 1317 */ 1318 if (!cr48_profile_sensor) 1319 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1320 } 1321 1322 if (SYN_CAP_PALMDETECT(info->capabilities)) 1323 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1324 1325 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1326 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1327 1328 if (synaptics_has_multifinger(priv)) { 1329 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1330 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1331 } 1332 1333 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1334 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1335 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1336 input_set_capability(dev, EV_KEY, BTN_BACK); 1337 } 1338 1339 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1340 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1341 input_set_capability(dev, EV_KEY, BTN_0 + i); 1342 1343 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1344 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1345 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1346 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1347 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1348 } 1349 1350 return 0; 1351 } 1352 1353 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1354 void *data, char *buf) 1355 { 1356 struct synaptics_data *priv = psmouse->private; 1357 1358 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1359 } 1360 1361 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1362 void *data, const char *buf, 1363 size_t len) 1364 { 1365 struct synaptics_data *priv = psmouse->private; 1366 unsigned int value; 1367 int err; 1368 1369 err = kstrtouint(buf, 10, &value); 1370 if (err) 1371 return err; 1372 1373 if (value > 1) 1374 return -EINVAL; 1375 1376 if (value == priv->disable_gesture) 1377 return len; 1378 1379 priv->disable_gesture = value; 1380 if (value) 1381 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1382 else 1383 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1384 1385 if (synaptics_mode_cmd(psmouse, priv->mode)) 1386 return -EIO; 1387 1388 return len; 1389 } 1390 1391 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1392 synaptics_show_disable_gesture, 1393 synaptics_set_disable_gesture); 1394 1395 static void synaptics_disconnect(struct psmouse *psmouse) 1396 { 1397 struct synaptics_data *priv = psmouse->private; 1398 1399 /* 1400 * We might have left a breadcrumb when trying to 1401 * set up SMbus companion. 1402 */ 1403 psmouse_smbus_cleanup(psmouse); 1404 1405 if (!priv->absolute_mode && 1406 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1407 device_remove_file(&psmouse->ps2dev.serio->dev, 1408 &psmouse_attr_disable_gesture.dattr); 1409 1410 synaptics_reset(psmouse); 1411 kfree(priv); 1412 psmouse->private = NULL; 1413 } 1414 1415 static int synaptics_reconnect(struct psmouse *psmouse) 1416 { 1417 struct synaptics_data *priv = psmouse->private; 1418 struct synaptics_device_info info; 1419 u8 param[2]; 1420 int retry = 0; 1421 int error; 1422 1423 do { 1424 psmouse_reset(psmouse); 1425 if (retry) { 1426 /* 1427 * On some boxes, right after resuming, the touchpad 1428 * needs some time to finish initializing (I assume 1429 * it needs time to calibrate) and start responding 1430 * to Synaptics-specific queries, so let's wait a 1431 * bit. 1432 */ 1433 ssleep(1); 1434 } 1435 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1436 error = synaptics_detect(psmouse, 0); 1437 } while (error && ++retry < 3); 1438 1439 if (error) 1440 return error; 1441 1442 if (retry > 1) 1443 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1444 1445 error = synaptics_query_hardware(psmouse, &info); 1446 if (error) { 1447 psmouse_err(psmouse, "Unable to query device.\n"); 1448 return error; 1449 } 1450 1451 error = synaptics_set_mode(psmouse); 1452 if (error) { 1453 psmouse_err(psmouse, "Unable to initialize device.\n"); 1454 return error; 1455 } 1456 1457 if (info.identity != priv->info.identity || 1458 info.model_id != priv->info.model_id || 1459 info.capabilities != priv->info.capabilities || 1460 info.ext_cap != priv->info.ext_cap) { 1461 psmouse_err(psmouse, 1462 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1463 priv->info.identity, info.identity, 1464 priv->info.model_id, info.model_id, 1465 priv->info.capabilities, info.capabilities, 1466 priv->info.ext_cap, info.ext_cap); 1467 return -ENXIO; 1468 } 1469 1470 return 0; 1471 } 1472 1473 static bool impaired_toshiba_kbc; 1474 1475 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1476 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1477 { 1478 /* Toshiba Satellite */ 1479 .matches = { 1480 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1481 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1482 }, 1483 }, 1484 { 1485 /* Toshiba Dynabook */ 1486 .matches = { 1487 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1488 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1489 }, 1490 }, 1491 { 1492 /* Toshiba Portege M300 */ 1493 .matches = { 1494 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1495 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1496 }, 1497 1498 }, 1499 { 1500 /* Toshiba Portege M300 */ 1501 .matches = { 1502 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1503 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1504 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1505 }, 1506 1507 }, 1508 #endif 1509 { } 1510 }; 1511 1512 static bool broken_olpc_ec; 1513 1514 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1515 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1516 { 1517 /* OLPC XO-1 or XO-1.5 */ 1518 .matches = { 1519 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1520 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1521 }, 1522 }, 1523 #endif 1524 { } 1525 }; 1526 1527 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1528 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1529 { 1530 /* Cr-48 Chromebook (Codename Mario) */ 1531 .matches = { 1532 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1533 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1534 }, 1535 }, 1536 #endif 1537 { } 1538 }; 1539 1540 void __init synaptics_module_init(void) 1541 { 1542 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1543 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1544 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1545 } 1546 1547 static int synaptics_init_ps2(struct psmouse *psmouse, 1548 struct synaptics_device_info *info, 1549 bool absolute_mode) 1550 { 1551 struct synaptics_data *priv; 1552 int err; 1553 1554 synaptics_apply_quirks(psmouse, info); 1555 1556 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1557 if (!priv) 1558 return -ENOMEM; 1559 1560 priv->info = *info; 1561 priv->absolute_mode = absolute_mode; 1562 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1563 priv->disable_gesture = true; 1564 1565 /* 1566 * Unfortunately ForcePad capability is not exported over PS/2, 1567 * so we have to resort to checking PNP IDs. 1568 */ 1569 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1570 1571 err = synaptics_set_mode(psmouse); 1572 if (err) { 1573 psmouse_err(psmouse, "Unable to initialize device.\n"); 1574 goto init_fail; 1575 } 1576 1577 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1578 SYN_NEWABS : SYN_OLDABS; 1579 1580 psmouse_info(psmouse, 1581 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1582 SYN_ID_MODEL(info->identity), 1583 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1584 info->model_id, 1585 info->capabilities, info->ext_cap, info->ext_cap_0c, 1586 info->ext_cap_10, info->board_id, info->firmware_id); 1587 1588 err = set_input_params(psmouse, priv); 1589 if (err) { 1590 psmouse_err(psmouse, 1591 "failed to set up capabilities: %d\n", err); 1592 goto init_fail; 1593 } 1594 1595 /* 1596 * Encode touchpad model so that it can be used to set 1597 * input device->id.version and be visible to userspace. 1598 * Because version is __u16 we have to drop something. 1599 * Hardware info bits seem to be good candidates as they 1600 * are documented to be for Synaptics corp. internal use. 1601 */ 1602 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1603 (info->model_id & 0x000000ff); 1604 1605 if (absolute_mode) { 1606 psmouse->protocol_handler = synaptics_process_byte; 1607 psmouse->pktsize = 6; 1608 } else { 1609 /* Relative mode follows standard PS/2 mouse protocol */ 1610 psmouse->protocol_handler = psmouse_process_byte; 1611 psmouse->pktsize = 3; 1612 } 1613 1614 psmouse->set_rate = synaptics_set_rate; 1615 psmouse->disconnect = synaptics_disconnect; 1616 psmouse->reconnect = synaptics_reconnect; 1617 psmouse->cleanup = synaptics_reset; 1618 /* Synaptics can usually stay in sync without extra help */ 1619 psmouse->resync_time = 0; 1620 1621 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1622 synaptics_pt_create(psmouse); 1623 1624 /* 1625 * Toshiba's KBC seems to have trouble handling data from 1626 * Synaptics at full rate. Switch to a lower rate (roughly 1627 * the same rate as a standard PS/2 mouse). 1628 */ 1629 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1630 psmouse_info(psmouse, 1631 "Toshiba %s detected, limiting rate to 40pps.\n", 1632 dmi_get_system_info(DMI_PRODUCT_NAME)); 1633 psmouse->rate = 40; 1634 } 1635 1636 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1637 err = device_create_file(&psmouse->ps2dev.serio->dev, 1638 &psmouse_attr_disable_gesture.dattr); 1639 if (err) { 1640 psmouse_err(psmouse, 1641 "Failed to create disable_gesture attribute (%d)", 1642 err); 1643 goto init_fail; 1644 } 1645 } 1646 1647 return 0; 1648 1649 init_fail: 1650 kfree(priv); 1651 return err; 1652 } 1653 1654 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1655 { 1656 struct synaptics_device_info info; 1657 int error; 1658 1659 psmouse_reset(psmouse); 1660 1661 error = synaptics_query_hardware(psmouse, &info); 1662 if (error) { 1663 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1664 return error; 1665 } 1666 1667 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1668 } 1669 1670 int synaptics_init_absolute(struct psmouse *psmouse) 1671 { 1672 return __synaptics_init(psmouse, true); 1673 } 1674 1675 int synaptics_init_relative(struct psmouse *psmouse) 1676 { 1677 return __synaptics_init(psmouse, false); 1678 } 1679 1680 static int synaptics_setup_ps2(struct psmouse *psmouse, 1681 struct synaptics_device_info *info) 1682 { 1683 bool absolute_mode = true; 1684 int error; 1685 1686 /* 1687 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1688 * packet spew overloads the EC such that key presses on the keyboard 1689 * are missed. Given that, don't even attempt to use Absolute mode. 1690 * Relative mode seems to work just fine. 1691 */ 1692 if (broken_olpc_ec) { 1693 psmouse_info(psmouse, 1694 "OLPC XO detected, forcing relative protocol.\n"); 1695 absolute_mode = false; 1696 } 1697 1698 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1699 if (error) 1700 return error; 1701 1702 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1703 } 1704 1705 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1706 1707 void __init synaptics_module_init(void) 1708 { 1709 } 1710 1711 static int __maybe_unused 1712 synaptics_setup_ps2(struct psmouse *psmouse, 1713 struct synaptics_device_info *info) 1714 { 1715 return -ENOSYS; 1716 } 1717 1718 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1719 1720 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1721 1722 /* 1723 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1724 * provides a better bandwidth and allow a better control of the touchpads. 1725 * This is used to decide if we need to use this bus or not. 1726 */ 1727 enum { 1728 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1729 SYNAPTICS_INTERTOUCH_OFF, 1730 SYNAPTICS_INTERTOUCH_ON, 1731 }; 1732 1733 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1734 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1735 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1736 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1737 1738 static int synaptics_create_intertouch(struct psmouse *psmouse, 1739 struct synaptics_device_info *info, 1740 bool leave_breadcrumbs) 1741 { 1742 bool topbuttonpad = 1743 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1744 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1745 const struct rmi_device_platform_data pdata = { 1746 .sensor_pdata = { 1747 .sensor_type = rmi_sensor_touchpad, 1748 .axis_align.flip_y = true, 1749 .kernel_tracking = false, 1750 .topbuttonpad = topbuttonpad, 1751 }, 1752 .f30_data = { 1753 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1754 .trackstick_buttons = 1755 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1756 }, 1757 }; 1758 const struct i2c_board_info intertouch_board = { 1759 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1760 .flags = I2C_CLIENT_HOST_NOTIFY, 1761 }; 1762 1763 return psmouse_smbus_init(psmouse, &intertouch_board, 1764 &pdata, sizeof(pdata), true, 1765 leave_breadcrumbs); 1766 } 1767 1768 /** 1769 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1770 * and decides to instantiate a SMBus InterTouch device. 1771 */ 1772 static int synaptics_setup_intertouch(struct psmouse *psmouse, 1773 struct synaptics_device_info *info, 1774 bool leave_breadcrumbs) 1775 { 1776 int error; 1777 1778 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1779 return -ENXIO; 1780 1781 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1782 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1783 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1784 1785 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1786 psmouse_info(psmouse, 1787 "Your touchpad (%s) says it can support a different bus. " 1788 "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", 1789 psmouse->ps2dev.serio->firmware_id); 1790 1791 return -ENXIO; 1792 } 1793 } 1794 1795 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1796 1797 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1798 if (error) { 1799 if (error == -EAGAIN) 1800 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1801 else 1802 psmouse_err(psmouse, "unable to create intertouch device\n"); 1803 1804 return error; 1805 } 1806 1807 return 0; 1808 } 1809 1810 int synaptics_init_smbus(struct psmouse *psmouse) 1811 { 1812 struct synaptics_device_info info; 1813 int error; 1814 1815 psmouse_reset(psmouse); 1816 1817 error = synaptics_query_hardware(psmouse, &info); 1818 if (error) { 1819 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1820 return error; 1821 } 1822 1823 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1824 return -ENXIO; 1825 1826 return synaptics_create_intertouch(psmouse, &info, false); 1827 } 1828 1829 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1830 1831 static int __maybe_unused 1832 synaptics_setup_intertouch(struct psmouse *psmouse, 1833 struct synaptics_device_info *info, 1834 bool leave_breadcrumbs) 1835 { 1836 return -ENOSYS; 1837 } 1838 1839 int synaptics_init_smbus(struct psmouse *psmouse) 1840 { 1841 return -ENOSYS; 1842 } 1843 1844 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1845 1846 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1847 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1848 1849 int synaptics_init(struct psmouse *psmouse) 1850 { 1851 struct synaptics_device_info info; 1852 int error; 1853 int retval; 1854 1855 psmouse_reset(psmouse); 1856 1857 error = synaptics_query_hardware(psmouse, &info); 1858 if (error) { 1859 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1860 return error; 1861 } 1862 1863 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1864 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1865 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1866 /* Forcepads need F21, which is not ready */ 1867 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1868 psmouse_warn(psmouse, 1869 "The touchpad can support a better bus than the too old PS/2 protocol. " 1870 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1871 } 1872 1873 error = synaptics_setup_intertouch(psmouse, &info, true); 1874 if (!error) 1875 return PSMOUSE_SYNAPTICS_SMBUS; 1876 } 1877 1878 retval = synaptics_setup_ps2(psmouse, &info); 1879 if (retval < 0) { 1880 /* 1881 * Not using any flavor of Synaptics support, so clean up 1882 * SMbus breadcrumbs, if any. 1883 */ 1884 psmouse_smbus_cleanup(psmouse); 1885 } 1886 1887 return retval; 1888 } 1889 1890 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1891 1892 int synaptics_init(struct psmouse *psmouse) 1893 { 1894 return -ENOSYS; 1895 } 1896 1897 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1898