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 "LEN0049", 150 "LEN2000", /* S540 */ 151 "LEN2001", /* Edge E431 */ 152 "LEN2002", /* Edge E531 */ 153 "LEN2003", 154 "LEN2004", /* L440 */ 155 "LEN2005", 156 "LEN2006", /* Edge E440/E540 */ 157 "LEN2007", 158 "LEN2008", 159 "LEN2009", 160 "LEN200A", 161 "LEN200B", 162 NULL 163 }; 164 165 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 "LEN004a", /* W541 */ 170 "LEN005b", /* P50 */ 171 "LEN005e", /* T560 */ 172 "LEN0071", /* T480 */ 173 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 174 "LEN0073", /* X1 Carbon G5 (Elantech) */ 175 "LEN0092", /* X1 Carbon 6 */ 176 "LEN0093", /* T480 */ 177 "LEN0096", /* X280 */ 178 "LEN0097", /* X280 -> ALPS trackpoint */ 179 "LEN009b", /* T580 */ 180 "LEN200f", /* T450s */ 181 "LEN2054", /* E480 */ 182 "LEN2055", /* E580 */ 183 "SYN3052", /* HP EliteBook 840 G4 */ 184 "SYN3221", /* HP 15-ay000 */ 185 NULL 186 }; 187 188 static const char * const forcepad_pnp_ids[] = { 189 "SYN300D", 190 "SYN3014", 191 NULL 192 }; 193 194 /* 195 * Send a command to the synpatics touchpad by special commands 196 */ 197 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 198 { 199 int error; 200 201 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 202 if (error) 203 return error; 204 205 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 206 if (error) 207 return error; 208 209 return 0; 210 } 211 212 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 213 { 214 int error; 215 union { 216 __be32 be_val; 217 char buf[4]; 218 } resp = { 0 }; 219 220 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 221 if (error) 222 return error; 223 224 *val = be32_to_cpu(resp.be_val); 225 return 0; 226 } 227 228 /* 229 * Identify Touchpad 230 * See also the SYN_ID_* macros 231 */ 232 static int synaptics_identify(struct psmouse *psmouse, 233 struct synaptics_device_info *info) 234 { 235 int error; 236 237 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 238 if (error) 239 return error; 240 241 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 242 } 243 244 /* 245 * Read the model-id bytes from the touchpad 246 * see also SYN_MODEL_* macros 247 */ 248 static int synaptics_model_id(struct psmouse *psmouse, 249 struct synaptics_device_info *info) 250 { 251 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 252 } 253 254 /* 255 * Read the firmware id from the touchpad 256 */ 257 static int synaptics_firmware_id(struct psmouse *psmouse, 258 struct synaptics_device_info *info) 259 { 260 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 261 &info->firmware_id); 262 } 263 264 /* 265 * Read the board id and the "More Extended Queries" from the touchpad 266 * The board id is encoded in the "QUERY MODES" response 267 */ 268 static int synaptics_query_modes(struct psmouse *psmouse, 269 struct synaptics_device_info *info) 270 { 271 u8 bid[3]; 272 int error; 273 274 /* firmwares prior 7.5 have no board_id encoded */ 275 if (SYN_ID_FULL(info->identity) < 0x705) 276 return 0; 277 278 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 279 if (error) 280 return error; 281 282 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 283 284 if (SYN_MEXT_CAP_BIT(bid[0])) 285 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 286 &info->ext_cap_10); 287 288 return 0; 289 } 290 291 /* 292 * Read the capability-bits from the touchpad 293 * see also the SYN_CAP_* macros 294 */ 295 static int synaptics_capability(struct psmouse *psmouse, 296 struct synaptics_device_info *info) 297 { 298 int error; 299 300 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 301 &info->capabilities); 302 if (error) 303 return error; 304 305 info->ext_cap = info->ext_cap_0c = 0; 306 307 /* 308 * Older firmwares had submodel ID fixed to 0x47 309 */ 310 if (SYN_ID_FULL(info->identity) < 0x705 && 311 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 312 return -ENXIO; 313 } 314 315 /* 316 * Unless capExtended is set the rest of the flags should be ignored 317 */ 318 if (!SYN_CAP_EXTENDED(info->capabilities)) 319 info->capabilities = 0; 320 321 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 322 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 323 &info->ext_cap); 324 if (error) { 325 psmouse_warn(psmouse, 326 "device claims to have extended capabilities, but I'm not able to read them.\n"); 327 } else { 328 /* 329 * if nExtBtn is greater than 8 it should be considered 330 * invalid and treated as 0 331 */ 332 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 333 info->ext_cap &= ~SYN_CAP_MB_MASK; 334 } 335 } 336 337 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 338 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 339 &info->ext_cap_0c); 340 if (error) 341 psmouse_warn(psmouse, 342 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 343 } 344 345 return 0; 346 } 347 348 /* 349 * Read touchpad resolution and maximum reported coordinates 350 * Resolution is left zero if touchpad does not support the query 351 */ 352 static int synaptics_resolution(struct psmouse *psmouse, 353 struct synaptics_device_info *info) 354 { 355 u8 resp[3]; 356 int error; 357 358 if (SYN_ID_MAJOR(info->identity) < 4) 359 return 0; 360 361 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 362 if (!error) { 363 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 364 info->x_res = resp[0]; /* x resolution in units/mm */ 365 info->y_res = resp[2]; /* y resolution in units/mm */ 366 } 367 } 368 369 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 370 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 371 error = synaptics_send_cmd(psmouse, 372 SYN_QUE_EXT_MAX_COORDS, resp); 373 if (error) { 374 psmouse_warn(psmouse, 375 "device claims to have max coordinates query, but I'm not able to read it.\n"); 376 } else { 377 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 378 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 379 psmouse_info(psmouse, 380 "queried max coordinates: x [..%d], y [..%d]\n", 381 info->x_max, info->y_max); 382 } 383 } 384 385 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 386 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 387 /* 388 * Firmware v8.1 does not report proper number of extended 389 * capabilities, but has been proven to report correct min 390 * coordinates. 391 */ 392 SYN_ID_FULL(info->identity) == 0x801)) { 393 error = synaptics_send_cmd(psmouse, 394 SYN_QUE_EXT_MIN_COORDS, resp); 395 if (error) { 396 psmouse_warn(psmouse, 397 "device claims to have min coordinates query, but I'm not able to read it.\n"); 398 } else { 399 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 400 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 401 psmouse_info(psmouse, 402 "queried min coordinates: x [%d..], y [%d..]\n", 403 info->x_min, info->y_min); 404 } 405 } 406 407 return 0; 408 } 409 410 static int synaptics_query_hardware(struct psmouse *psmouse, 411 struct synaptics_device_info *info) 412 { 413 int error; 414 415 memset(info, 0, sizeof(*info)); 416 417 error = synaptics_identify(psmouse, info); 418 if (error) 419 return error; 420 421 error = synaptics_model_id(psmouse, info); 422 if (error) 423 return error; 424 425 error = synaptics_firmware_id(psmouse, info); 426 if (error) 427 return error; 428 429 error = synaptics_query_modes(psmouse, info); 430 if (error) 431 return error; 432 433 error = synaptics_capability(psmouse, info); 434 if (error) 435 return error; 436 437 error = synaptics_resolution(psmouse, info); 438 if (error) 439 return error; 440 441 return 0; 442 } 443 444 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 445 446 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 447 448 static bool cr48_profile_sensor; 449 450 #define ANY_BOARD_ID 0 451 struct min_max_quirk { 452 const char * const *pnp_ids; 453 struct { 454 u32 min, max; 455 } board_id; 456 u32 x_min, x_max, y_min, y_max; 457 }; 458 459 static const struct min_max_quirk min_max_pnpid_table[] = { 460 { 461 (const char * const []){"LEN0033", NULL}, 462 {ANY_BOARD_ID, ANY_BOARD_ID}, 463 1024, 5052, 2258, 4832 464 }, 465 { 466 (const char * const []){"LEN0042", NULL}, 467 {ANY_BOARD_ID, ANY_BOARD_ID}, 468 1232, 5710, 1156, 4696 469 }, 470 { 471 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 472 "LEN0039", "LEN2002", "LEN2004", 473 NULL}, 474 {ANY_BOARD_ID, 2961}, 475 1024, 5112, 2024, 4832 476 }, 477 { 478 (const char * const []){"LEN2000", NULL}, 479 {ANY_BOARD_ID, ANY_BOARD_ID}, 480 1024, 5113, 2021, 4832 481 }, 482 { 483 (const char * const []){"LEN2001", NULL}, 484 {ANY_BOARD_ID, ANY_BOARD_ID}, 485 1024, 5022, 2508, 4832 486 }, 487 { 488 (const char * const []){"LEN2006", NULL}, 489 {2691, 2691}, 490 1024, 5045, 2457, 4832 491 }, 492 { 493 (const char * const []){"LEN2006", NULL}, 494 {ANY_BOARD_ID, ANY_BOARD_ID}, 495 1264, 5675, 1171, 4688 496 }, 497 { } 498 }; 499 500 /***************************************************************************** 501 * Synaptics communications functions 502 ****************************************************************************/ 503 504 /* 505 * Synaptics touchpads report the y coordinate from bottom to top, which is 506 * opposite from what userspace expects. 507 * This function is used to invert y before reporting. 508 */ 509 static int synaptics_invert_y(int y) 510 { 511 return YMAX_NOMINAL + YMIN_NOMINAL - y; 512 } 513 514 /* 515 * Apply quirk(s) if the hardware matches 516 */ 517 static void synaptics_apply_quirks(struct psmouse *psmouse, 518 struct synaptics_device_info *info) 519 { 520 int i; 521 522 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 523 if (!psmouse_matches_pnp_id(psmouse, 524 min_max_pnpid_table[i].pnp_ids)) 525 continue; 526 527 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 528 info->board_id < min_max_pnpid_table[i].board_id.min) 529 continue; 530 531 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 532 info->board_id > min_max_pnpid_table[i].board_id.max) 533 continue; 534 535 info->x_min = min_max_pnpid_table[i].x_min; 536 info->x_max = min_max_pnpid_table[i].x_max; 537 info->y_min = min_max_pnpid_table[i].y_min; 538 info->y_max = min_max_pnpid_table[i].y_max; 539 psmouse_info(psmouse, 540 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 541 info->x_min, info->x_max, 542 info->y_min, info->y_max); 543 break; 544 } 545 } 546 547 static bool synaptics_has_agm(struct synaptics_data *priv) 548 { 549 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 550 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 551 } 552 553 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 554 { 555 static u8 param = 0xc8; 556 int error; 557 558 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 559 if (error) 560 return error; 561 562 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 563 if (error) 564 return error; 565 566 return 0; 567 } 568 569 static int synaptics_set_mode(struct psmouse *psmouse) 570 { 571 struct synaptics_data *priv = psmouse->private; 572 int error; 573 574 priv->mode = 0; 575 if (priv->absolute_mode) 576 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 577 if (priv->disable_gesture) 578 priv->mode |= SYN_BIT_DISABLE_GESTURE; 579 if (psmouse->rate >= 80) 580 priv->mode |= SYN_BIT_HIGH_RATE; 581 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 582 priv->mode |= SYN_BIT_W_MODE; 583 584 error = synaptics_mode_cmd(psmouse, priv->mode); 585 if (error) 586 return error; 587 588 if (priv->absolute_mode && synaptics_has_agm(priv)) { 589 error = synaptics_set_advanced_gesture_mode(psmouse); 590 if (error) { 591 psmouse_err(psmouse, 592 "Advanced gesture mode init failed: %d\n", 593 error); 594 return error; 595 } 596 } 597 598 return 0; 599 } 600 601 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 602 { 603 struct synaptics_data *priv = psmouse->private; 604 605 if (rate >= 80) { 606 priv->mode |= SYN_BIT_HIGH_RATE; 607 psmouse->rate = 80; 608 } else { 609 priv->mode &= ~SYN_BIT_HIGH_RATE; 610 psmouse->rate = 40; 611 } 612 613 synaptics_mode_cmd(psmouse, priv->mode); 614 } 615 616 /***************************************************************************** 617 * Synaptics pass-through PS/2 port support 618 ****************************************************************************/ 619 static int synaptics_pt_write(struct serio *serio, u8 c) 620 { 621 struct psmouse *parent = serio_get_drvdata(serio->parent); 622 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 623 int error; 624 625 error = ps2_sliced_command(&parent->ps2dev, c); 626 if (error) 627 return error; 628 629 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 630 if (error) 631 return error; 632 633 return 0; 634 } 635 636 static int synaptics_pt_start(struct serio *serio) 637 { 638 struct psmouse *parent = serio_get_drvdata(serio->parent); 639 struct synaptics_data *priv = parent->private; 640 641 serio_pause_rx(parent->ps2dev.serio); 642 priv->pt_port = serio; 643 serio_continue_rx(parent->ps2dev.serio); 644 645 return 0; 646 } 647 648 static void synaptics_pt_stop(struct serio *serio) 649 { 650 struct psmouse *parent = serio_get_drvdata(serio->parent); 651 struct synaptics_data *priv = parent->private; 652 653 serio_pause_rx(parent->ps2dev.serio); 654 priv->pt_port = NULL; 655 serio_continue_rx(parent->ps2dev.serio); 656 } 657 658 static int synaptics_is_pt_packet(u8 *buf) 659 { 660 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 661 } 662 663 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet) 664 { 665 struct psmouse *child = serio_get_drvdata(ptport); 666 667 if (child && child->state == PSMOUSE_ACTIVATED) { 668 serio_interrupt(ptport, packet[1], 0); 669 serio_interrupt(ptport, packet[4], 0); 670 serio_interrupt(ptport, packet[5], 0); 671 if (child->pktsize == 4) 672 serio_interrupt(ptport, packet[2], 0); 673 } else { 674 serio_interrupt(ptport, packet[1], 0); 675 } 676 } 677 678 static void synaptics_pt_activate(struct psmouse *psmouse) 679 { 680 struct synaptics_data *priv = psmouse->private; 681 struct psmouse *child = serio_get_drvdata(priv->pt_port); 682 683 /* adjust the touchpad to child's choice of protocol */ 684 if (child) { 685 if (child->pktsize == 4) 686 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 687 else 688 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 689 690 if (synaptics_mode_cmd(psmouse, priv->mode)) 691 psmouse_warn(psmouse, 692 "failed to switch guest protocol\n"); 693 } 694 } 695 696 static void synaptics_pt_create(struct psmouse *psmouse) 697 { 698 struct serio *serio; 699 700 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 701 if (!serio) { 702 psmouse_err(psmouse, 703 "not enough memory for pass-through port\n"); 704 return; 705 } 706 707 serio->id.type = SERIO_PS_PSTHRU; 708 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 709 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 710 serio->write = synaptics_pt_write; 711 serio->start = synaptics_pt_start; 712 serio->stop = synaptics_pt_stop; 713 serio->parent = psmouse->ps2dev.serio; 714 715 psmouse->pt_activate = synaptics_pt_activate; 716 717 psmouse_info(psmouse, "serio: %s port at %s\n", 718 serio->name, psmouse->phys); 719 serio_register_port(serio); 720 } 721 722 /***************************************************************************** 723 * Functions to interpret the absolute mode packets 724 ****************************************************************************/ 725 726 static void synaptics_parse_agm(const u8 buf[], 727 struct synaptics_data *priv, 728 struct synaptics_hw_state *hw) 729 { 730 struct synaptics_hw_state *agm = &priv->agm; 731 int agm_packet_type; 732 733 agm_packet_type = (buf[5] & 0x30) >> 4; 734 switch (agm_packet_type) { 735 case 1: 736 /* Gesture packet: (x, y, z) half resolution */ 737 agm->w = hw->w; 738 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 739 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 740 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 741 break; 742 743 case 2: 744 /* AGM-CONTACT packet: we are only interested in the count */ 745 priv->agm_count = buf[1]; 746 break; 747 748 default: 749 break; 750 } 751 } 752 753 static void synaptics_parse_ext_buttons(const u8 buf[], 754 struct synaptics_data *priv, 755 struct synaptics_hw_state *hw) 756 { 757 unsigned int ext_bits = 758 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 759 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 760 761 hw->ext_buttons = buf[4] & ext_mask; 762 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 763 } 764 765 static int synaptics_parse_hw_state(const u8 buf[], 766 struct synaptics_data *priv, 767 struct synaptics_hw_state *hw) 768 { 769 memset(hw, 0, sizeof(struct synaptics_hw_state)); 770 771 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 772 hw->w = (((buf[0] & 0x30) >> 2) | 773 ((buf[0] & 0x04) >> 1) | 774 ((buf[3] & 0x04) >> 2)); 775 776 if (synaptics_has_agm(priv) && hw->w == 2) { 777 synaptics_parse_agm(buf, priv, hw); 778 return 1; 779 } 780 781 hw->x = (((buf[3] & 0x10) << 8) | 782 ((buf[1] & 0x0f) << 8) | 783 buf[4]); 784 hw->y = (((buf[3] & 0x20) << 7) | 785 ((buf[1] & 0xf0) << 4) | 786 buf[5]); 787 hw->z = buf[2]; 788 789 hw->left = (buf[0] & 0x01) ? 1 : 0; 790 hw->right = (buf[0] & 0x02) ? 1 : 0; 791 792 if (priv->is_forcepad) { 793 /* 794 * ForcePads, like Clickpads, use middle button 795 * bits to report primary button clicks. 796 * Unfortunately they report primary button not 797 * only when user presses on the pad above certain 798 * threshold, but also when there are more than one 799 * finger on the touchpad, which interferes with 800 * out multi-finger gestures. 801 */ 802 if (hw->z == 0) { 803 /* No contacts */ 804 priv->press = priv->report_press = false; 805 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 806 /* 807 * Single-finger touch with pressure above 808 * the threshold. If pressure stays long 809 * enough, we'll start reporting primary 810 * button. We rely on the device continuing 811 * sending data even if finger does not 812 * move. 813 */ 814 if (!priv->press) { 815 priv->press_start = jiffies; 816 priv->press = true; 817 } else if (time_after(jiffies, 818 priv->press_start + 819 msecs_to_jiffies(50))) { 820 priv->report_press = true; 821 } 822 } else { 823 priv->press = false; 824 } 825 826 hw->left = priv->report_press; 827 828 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 829 /* 830 * Clickpad's button is transmitted as middle button, 831 * however, since it is primary button, we will report 832 * it as BTN_LEFT. 833 */ 834 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 835 836 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 837 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 838 if (hw->w == 2) 839 hw->scroll = (s8)buf[1]; 840 } 841 842 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 843 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 844 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 845 } 846 847 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 848 ((buf[0] ^ buf[3]) & 0x02)) { 849 synaptics_parse_ext_buttons(buf, priv, hw); 850 } 851 } else { 852 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 853 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 854 855 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 856 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 857 858 hw->left = (buf[0] & 0x01) ? 1 : 0; 859 hw->right = (buf[0] & 0x02) ? 1 : 0; 860 } 861 862 /* 863 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 864 * is used by some firmware to indicate a finger at the edge of 865 * the touchpad whose precise position cannot be determined, so 866 * convert these values to the maximum axis value. 867 */ 868 if (hw->x > X_MAX_POSITIVE) 869 hw->x -= 1 << ABS_POS_BITS; 870 else if (hw->x == X_MAX_POSITIVE) 871 hw->x = XMAX; 872 873 if (hw->y > Y_MAX_POSITIVE) 874 hw->y -= 1 << ABS_POS_BITS; 875 else if (hw->y == Y_MAX_POSITIVE) 876 hw->y = YMAX; 877 878 return 0; 879 } 880 881 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 882 bool active, int x, int y) 883 { 884 input_mt_slot(dev, slot); 885 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 886 if (active) { 887 input_report_abs(dev, ABS_MT_POSITION_X, x); 888 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 889 } 890 } 891 892 static void synaptics_report_semi_mt_data(struct input_dev *dev, 893 const struct synaptics_hw_state *a, 894 const struct synaptics_hw_state *b, 895 int num_fingers) 896 { 897 if (num_fingers >= 2) { 898 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 899 min(a->y, b->y)); 900 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 901 max(a->y, b->y)); 902 } else if (num_fingers == 1) { 903 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 904 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 905 } else { 906 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 907 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 908 } 909 } 910 911 static void synaptics_report_ext_buttons(struct psmouse *psmouse, 912 const struct synaptics_hw_state *hw) 913 { 914 struct input_dev *dev = psmouse->dev; 915 struct synaptics_data *priv = psmouse->private; 916 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 917 int i; 918 919 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 920 return; 921 922 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 923 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 924 SYN_ID_FULL(priv->info.identity) == 0x802) && 925 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 926 return; 927 928 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 929 for (i = 0; i < ext_bits; i++) { 930 input_report_key(dev, BTN_0 + 2 * i, 931 hw->ext_buttons & BIT(i)); 932 input_report_key(dev, BTN_1 + 2 * i, 933 hw->ext_buttons & BIT(i + ext_bits)); 934 } 935 return; 936 } 937 938 /* 939 * This generation of touchpads has the trackstick buttons 940 * physically wired to the touchpad. Re-route them through 941 * the pass-through interface. 942 */ 943 if (priv->pt_port) { 944 u8 pt_buttons; 945 946 /* The trackstick expects at most 3 buttons */ 947 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 948 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 949 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 950 951 serio_interrupt(priv->pt_port, 952 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 953 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 954 } 955 } 956 957 static void synaptics_report_buttons(struct psmouse *psmouse, 958 const struct synaptics_hw_state *hw) 959 { 960 struct input_dev *dev = psmouse->dev; 961 struct synaptics_data *priv = psmouse->private; 962 963 input_report_key(dev, BTN_LEFT, hw->left); 964 input_report_key(dev, BTN_RIGHT, hw->right); 965 966 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 967 input_report_key(dev, BTN_MIDDLE, hw->middle); 968 969 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 970 input_report_key(dev, BTN_FORWARD, hw->up); 971 input_report_key(dev, BTN_BACK, hw->down); 972 } 973 974 synaptics_report_ext_buttons(psmouse, hw); 975 } 976 977 static void synaptics_report_mt_data(struct psmouse *psmouse, 978 const struct synaptics_hw_state *sgm, 979 int num_fingers) 980 { 981 struct input_dev *dev = psmouse->dev; 982 struct synaptics_data *priv = psmouse->private; 983 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 984 struct input_mt_pos pos[2]; 985 int slot[2], nsemi, i; 986 987 nsemi = clamp_val(num_fingers, 0, 2); 988 989 for (i = 0; i < nsemi; i++) { 990 pos[i].x = hw[i]->x; 991 pos[i].y = synaptics_invert_y(hw[i]->y); 992 } 993 994 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 995 996 for (i = 0; i < nsemi; i++) { 997 input_mt_slot(dev, slot[i]); 998 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 999 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1000 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1001 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1002 } 1003 1004 input_mt_drop_unused(dev); 1005 1006 /* Don't use active slot count to generate BTN_TOOL events. */ 1007 input_mt_report_pointer_emulation(dev, false); 1008 1009 /* Send the number of fingers reported by touchpad itself. */ 1010 input_mt_report_finger_count(dev, num_fingers); 1011 1012 synaptics_report_buttons(psmouse, sgm); 1013 1014 input_sync(dev); 1015 } 1016 1017 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1018 struct synaptics_hw_state *sgm) 1019 { 1020 struct synaptics_data *priv = psmouse->private; 1021 int num_fingers; 1022 1023 /* 1024 * Update mt_state using the new finger count and current mt_state. 1025 */ 1026 if (sgm->z == 0) 1027 num_fingers = 0; 1028 else if (sgm->w >= 4) 1029 num_fingers = 1; 1030 else if (sgm->w == 0) 1031 num_fingers = 2; 1032 else if (sgm->w == 1) 1033 num_fingers = priv->agm_count ? priv->agm_count : 3; 1034 else 1035 num_fingers = 4; 1036 1037 /* Send resulting input events to user space */ 1038 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1039 } 1040 1041 static bool synaptics_has_multifinger(struct synaptics_data *priv) 1042 { 1043 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1044 return true; 1045 1046 /* Advanced gesture mode also sends multi finger data */ 1047 return synaptics_has_agm(priv); 1048 } 1049 1050 /* 1051 * called for each full received packet from the touchpad 1052 */ 1053 static void synaptics_process_packet(struct psmouse *psmouse) 1054 { 1055 struct input_dev *dev = psmouse->dev; 1056 struct synaptics_data *priv = psmouse->private; 1057 struct synaptics_device_info *info = &priv->info; 1058 struct synaptics_hw_state hw; 1059 int num_fingers; 1060 int finger_width; 1061 1062 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1063 return; 1064 1065 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1066 synaptics_image_sensor_process(psmouse, &hw); 1067 return; 1068 } 1069 1070 if (hw.scroll) { 1071 priv->scroll += hw.scroll; 1072 1073 while (priv->scroll >= 4) { 1074 input_report_key(dev, BTN_BACK, !hw.down); 1075 input_sync(dev); 1076 input_report_key(dev, BTN_BACK, hw.down); 1077 input_sync(dev); 1078 priv->scroll -= 4; 1079 } 1080 while (priv->scroll <= -4) { 1081 input_report_key(dev, BTN_FORWARD, !hw.up); 1082 input_sync(dev); 1083 input_report_key(dev, BTN_FORWARD, hw.up); 1084 input_sync(dev); 1085 priv->scroll += 4; 1086 } 1087 return; 1088 } 1089 1090 if (hw.z > 0 && hw.x > 1) { 1091 num_fingers = 1; 1092 finger_width = 5; 1093 if (SYN_CAP_EXTENDED(info->capabilities)) { 1094 switch (hw.w) { 1095 case 0 ... 1: 1096 if (synaptics_has_multifinger(priv)) 1097 num_fingers = hw.w + 2; 1098 break; 1099 case 2: 1100 if (SYN_MODEL_PEN(info->model_id)) 1101 ; /* Nothing, treat a pen as a single finger */ 1102 break; 1103 case 4 ... 15: 1104 if (SYN_CAP_PALMDETECT(info->capabilities)) 1105 finger_width = hw.w; 1106 break; 1107 } 1108 } 1109 } else { 1110 num_fingers = 0; 1111 finger_width = 0; 1112 } 1113 1114 if (cr48_profile_sensor) { 1115 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1116 return; 1117 } 1118 1119 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1120 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1121 num_fingers); 1122 1123 /* Post events 1124 * BTN_TOUCH has to be first as mousedev relies on it when doing 1125 * absolute -> relative conversion 1126 */ 1127 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1128 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1129 1130 if (num_fingers > 0) { 1131 input_report_abs(dev, ABS_X, hw.x); 1132 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1133 } 1134 input_report_abs(dev, ABS_PRESSURE, hw.z); 1135 1136 if (SYN_CAP_PALMDETECT(info->capabilities)) 1137 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1138 1139 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1140 if (synaptics_has_multifinger(priv)) { 1141 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1142 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1143 } 1144 1145 synaptics_report_buttons(psmouse, &hw); 1146 1147 input_sync(dev); 1148 } 1149 1150 static bool synaptics_validate_byte(struct psmouse *psmouse, 1151 int idx, enum synaptics_pkt_type pkt_type) 1152 { 1153 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1154 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1155 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1156 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1157 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1158 const u8 *packet = psmouse->packet; 1159 1160 if (idx < 0 || idx > 4) 1161 return false; 1162 1163 switch (pkt_type) { 1164 1165 case SYN_NEWABS: 1166 case SYN_NEWABS_RELAXED: 1167 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1168 1169 case SYN_NEWABS_STRICT: 1170 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1171 1172 case SYN_OLDABS: 1173 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1174 1175 default: 1176 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1177 return false; 1178 } 1179 } 1180 1181 static enum synaptics_pkt_type 1182 synaptics_detect_pkt_type(struct psmouse *psmouse) 1183 { 1184 int i; 1185 1186 for (i = 0; i < 5; i++) { 1187 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1188 psmouse_info(psmouse, "using relaxed packet validation\n"); 1189 return SYN_NEWABS_RELAXED; 1190 } 1191 } 1192 1193 return SYN_NEWABS_STRICT; 1194 } 1195 1196 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1197 { 1198 struct synaptics_data *priv = psmouse->private; 1199 1200 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1201 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1202 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1203 1204 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1205 synaptics_is_pt_packet(psmouse->packet)) { 1206 if (priv->pt_port) 1207 synaptics_pass_pt_packet(priv->pt_port, 1208 psmouse->packet); 1209 } else 1210 synaptics_process_packet(psmouse); 1211 1212 return PSMOUSE_FULL_PACKET; 1213 } 1214 1215 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1216 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1217 } 1218 1219 /***************************************************************************** 1220 * Driver initialization/cleanup functions 1221 ****************************************************************************/ 1222 static void set_abs_position_params(struct input_dev *dev, 1223 struct synaptics_device_info *info, 1224 int x_code, int y_code) 1225 { 1226 int x_min = info->x_min ?: XMIN_NOMINAL; 1227 int x_max = info->x_max ?: XMAX_NOMINAL; 1228 int y_min = info->y_min ?: YMIN_NOMINAL; 1229 int y_max = info->y_max ?: YMAX_NOMINAL; 1230 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1231 SYN_REDUCED_FILTER_FUZZ : 0; 1232 1233 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1234 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1235 input_abs_set_res(dev, x_code, info->x_res); 1236 input_abs_set_res(dev, y_code, info->y_res); 1237 } 1238 1239 static int set_input_params(struct psmouse *psmouse, 1240 struct synaptics_data *priv) 1241 { 1242 struct input_dev *dev = psmouse->dev; 1243 struct synaptics_device_info *info = &priv->info; 1244 int i; 1245 int error; 1246 1247 /* Reset default psmouse capabilities */ 1248 __clear_bit(EV_REL, dev->evbit); 1249 bitmap_zero(dev->relbit, REL_CNT); 1250 bitmap_zero(dev->keybit, KEY_CNT); 1251 1252 /* Things that apply to both modes */ 1253 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1254 1255 input_set_capability(dev, EV_KEY, BTN_LEFT); 1256 1257 /* Clickpads report only left button */ 1258 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1259 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1260 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1261 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1262 } 1263 1264 if (!priv->absolute_mode) { 1265 /* Relative mode */ 1266 input_set_capability(dev, EV_REL, REL_X); 1267 input_set_capability(dev, EV_REL, REL_Y); 1268 return 0; 1269 } 1270 1271 /* Absolute mode */ 1272 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1273 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1274 1275 if (cr48_profile_sensor) 1276 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1277 1278 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1279 set_abs_position_params(dev, info, 1280 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1281 /* Image sensors can report per-contact pressure */ 1282 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1283 1284 error = input_mt_init_slots(dev, 2, 1285 INPUT_MT_POINTER | INPUT_MT_TRACK); 1286 if (error) 1287 return error; 1288 1289 /* Image sensors can signal 4 and 5 finger clicks */ 1290 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1291 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1292 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1293 set_abs_position_params(dev, info, 1294 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1295 /* 1296 * Profile sensor in CR-48 tracks contacts reasonably well, 1297 * other non-image sensors with AGM use semi-mt. 1298 */ 1299 error = input_mt_init_slots(dev, 2, 1300 INPUT_MT_POINTER | 1301 (cr48_profile_sensor ? 1302 INPUT_MT_TRACK : 1303 INPUT_MT_SEMI_MT)); 1304 if (error) 1305 return error; 1306 1307 /* 1308 * For semi-mt devices we send ABS_X/Y ourselves instead of 1309 * input_mt_report_pointer_emulation. But 1310 * input_mt_init_slots() resets the fuzz to 0, leading to a 1311 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1312 * position. Let's re-initialize ABS_X/Y here. 1313 */ 1314 if (!cr48_profile_sensor) 1315 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1316 } 1317 1318 if (SYN_CAP_PALMDETECT(info->capabilities)) 1319 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1320 1321 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1322 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1323 1324 if (synaptics_has_multifinger(priv)) { 1325 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1326 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1327 } 1328 1329 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1330 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1331 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1332 input_set_capability(dev, EV_KEY, BTN_BACK); 1333 } 1334 1335 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1336 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1337 input_set_capability(dev, EV_KEY, BTN_0 + i); 1338 1339 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1340 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1341 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1342 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1343 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1344 } 1345 1346 return 0; 1347 } 1348 1349 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1350 void *data, char *buf) 1351 { 1352 struct synaptics_data *priv = psmouse->private; 1353 1354 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1355 } 1356 1357 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1358 void *data, const char *buf, 1359 size_t len) 1360 { 1361 struct synaptics_data *priv = psmouse->private; 1362 unsigned int value; 1363 int err; 1364 1365 err = kstrtouint(buf, 10, &value); 1366 if (err) 1367 return err; 1368 1369 if (value > 1) 1370 return -EINVAL; 1371 1372 if (value == priv->disable_gesture) 1373 return len; 1374 1375 priv->disable_gesture = value; 1376 if (value) 1377 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1378 else 1379 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1380 1381 if (synaptics_mode_cmd(psmouse, priv->mode)) 1382 return -EIO; 1383 1384 return len; 1385 } 1386 1387 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1388 synaptics_show_disable_gesture, 1389 synaptics_set_disable_gesture); 1390 1391 static void synaptics_disconnect(struct psmouse *psmouse) 1392 { 1393 struct synaptics_data *priv = psmouse->private; 1394 1395 /* 1396 * We might have left a breadcrumb when trying to 1397 * set up SMbus companion. 1398 */ 1399 psmouse_smbus_cleanup(psmouse); 1400 1401 if (!priv->absolute_mode && 1402 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1403 device_remove_file(&psmouse->ps2dev.serio->dev, 1404 &psmouse_attr_disable_gesture.dattr); 1405 1406 synaptics_reset(psmouse); 1407 kfree(priv); 1408 psmouse->private = NULL; 1409 } 1410 1411 static int synaptics_reconnect(struct psmouse *psmouse) 1412 { 1413 struct synaptics_data *priv = psmouse->private; 1414 struct synaptics_device_info info; 1415 u8 param[2]; 1416 int retry = 0; 1417 int error; 1418 1419 do { 1420 psmouse_reset(psmouse); 1421 if (retry) { 1422 /* 1423 * On some boxes, right after resuming, the touchpad 1424 * needs some time to finish initializing (I assume 1425 * it needs time to calibrate) and start responding 1426 * to Synaptics-specific queries, so let's wait a 1427 * bit. 1428 */ 1429 ssleep(1); 1430 } 1431 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1432 error = synaptics_detect(psmouse, 0); 1433 } while (error && ++retry < 3); 1434 1435 if (error) 1436 return error; 1437 1438 if (retry > 1) 1439 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1440 1441 error = synaptics_query_hardware(psmouse, &info); 1442 if (error) { 1443 psmouse_err(psmouse, "Unable to query device.\n"); 1444 return error; 1445 } 1446 1447 error = synaptics_set_mode(psmouse); 1448 if (error) { 1449 psmouse_err(psmouse, "Unable to initialize device.\n"); 1450 return error; 1451 } 1452 1453 if (info.identity != priv->info.identity || 1454 info.model_id != priv->info.model_id || 1455 info.capabilities != priv->info.capabilities || 1456 info.ext_cap != priv->info.ext_cap) { 1457 psmouse_err(psmouse, 1458 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1459 priv->info.identity, info.identity, 1460 priv->info.model_id, info.model_id, 1461 priv->info.capabilities, info.capabilities, 1462 priv->info.ext_cap, info.ext_cap); 1463 return -ENXIO; 1464 } 1465 1466 return 0; 1467 } 1468 1469 static bool impaired_toshiba_kbc; 1470 1471 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1472 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1473 { 1474 /* Toshiba Satellite */ 1475 .matches = { 1476 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1477 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1478 }, 1479 }, 1480 { 1481 /* Toshiba Dynabook */ 1482 .matches = { 1483 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1484 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1485 }, 1486 }, 1487 { 1488 /* Toshiba Portege M300 */ 1489 .matches = { 1490 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1491 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1492 }, 1493 1494 }, 1495 { 1496 /* Toshiba Portege M300 */ 1497 .matches = { 1498 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1499 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1500 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1501 }, 1502 1503 }, 1504 #endif 1505 { } 1506 }; 1507 1508 static bool broken_olpc_ec; 1509 1510 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1511 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1512 { 1513 /* OLPC XO-1 or XO-1.5 */ 1514 .matches = { 1515 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1516 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1517 }, 1518 }, 1519 #endif 1520 { } 1521 }; 1522 1523 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1524 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1525 { 1526 /* Cr-48 Chromebook (Codename Mario) */ 1527 .matches = { 1528 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1529 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1530 }, 1531 }, 1532 #endif 1533 { } 1534 }; 1535 1536 void __init synaptics_module_init(void) 1537 { 1538 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1539 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1540 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1541 } 1542 1543 static int synaptics_init_ps2(struct psmouse *psmouse, 1544 struct synaptics_device_info *info, 1545 bool absolute_mode) 1546 { 1547 struct synaptics_data *priv; 1548 int err; 1549 1550 synaptics_apply_quirks(psmouse, info); 1551 1552 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1553 if (!priv) 1554 return -ENOMEM; 1555 1556 priv->info = *info; 1557 priv->absolute_mode = absolute_mode; 1558 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1559 priv->disable_gesture = true; 1560 1561 /* 1562 * Unfortunately ForcePad capability is not exported over PS/2, 1563 * so we have to resort to checking PNP IDs. 1564 */ 1565 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1566 1567 err = synaptics_set_mode(psmouse); 1568 if (err) { 1569 psmouse_err(psmouse, "Unable to initialize device.\n"); 1570 goto init_fail; 1571 } 1572 1573 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1574 SYN_NEWABS : SYN_OLDABS; 1575 1576 psmouse_info(psmouse, 1577 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1578 SYN_ID_MODEL(info->identity), 1579 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1580 info->model_id, 1581 info->capabilities, info->ext_cap, info->ext_cap_0c, 1582 info->ext_cap_10, info->board_id, info->firmware_id); 1583 1584 err = set_input_params(psmouse, priv); 1585 if (err) { 1586 psmouse_err(psmouse, 1587 "failed to set up capabilities: %d\n", err); 1588 goto init_fail; 1589 } 1590 1591 /* 1592 * Encode touchpad model so that it can be used to set 1593 * input device->id.version and be visible to userspace. 1594 * Because version is __u16 we have to drop something. 1595 * Hardware info bits seem to be good candidates as they 1596 * are documented to be for Synaptics corp. internal use. 1597 */ 1598 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1599 (info->model_id & 0x000000ff); 1600 1601 if (absolute_mode) { 1602 psmouse->protocol_handler = synaptics_process_byte; 1603 psmouse->pktsize = 6; 1604 } else { 1605 /* Relative mode follows standard PS/2 mouse protocol */ 1606 psmouse->protocol_handler = psmouse_process_byte; 1607 psmouse->pktsize = 3; 1608 } 1609 1610 psmouse->set_rate = synaptics_set_rate; 1611 psmouse->disconnect = synaptics_disconnect; 1612 psmouse->reconnect = synaptics_reconnect; 1613 psmouse->cleanup = synaptics_reset; 1614 /* Synaptics can usually stay in sync without extra help */ 1615 psmouse->resync_time = 0; 1616 1617 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1618 synaptics_pt_create(psmouse); 1619 1620 /* 1621 * Toshiba's KBC seems to have trouble handling data from 1622 * Synaptics at full rate. Switch to a lower rate (roughly 1623 * the same rate as a standard PS/2 mouse). 1624 */ 1625 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1626 psmouse_info(psmouse, 1627 "Toshiba %s detected, limiting rate to 40pps.\n", 1628 dmi_get_system_info(DMI_PRODUCT_NAME)); 1629 psmouse->rate = 40; 1630 } 1631 1632 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1633 err = device_create_file(&psmouse->ps2dev.serio->dev, 1634 &psmouse_attr_disable_gesture.dattr); 1635 if (err) { 1636 psmouse_err(psmouse, 1637 "Failed to create disable_gesture attribute (%d)", 1638 err); 1639 goto init_fail; 1640 } 1641 } 1642 1643 return 0; 1644 1645 init_fail: 1646 kfree(priv); 1647 return err; 1648 } 1649 1650 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1651 { 1652 struct synaptics_device_info info; 1653 int error; 1654 1655 psmouse_reset(psmouse); 1656 1657 error = synaptics_query_hardware(psmouse, &info); 1658 if (error) { 1659 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1660 return error; 1661 } 1662 1663 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1664 } 1665 1666 int synaptics_init_absolute(struct psmouse *psmouse) 1667 { 1668 return __synaptics_init(psmouse, true); 1669 } 1670 1671 int synaptics_init_relative(struct psmouse *psmouse) 1672 { 1673 return __synaptics_init(psmouse, false); 1674 } 1675 1676 static int synaptics_setup_ps2(struct psmouse *psmouse, 1677 struct synaptics_device_info *info) 1678 { 1679 bool absolute_mode = true; 1680 int error; 1681 1682 /* 1683 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1684 * packet spew overloads the EC such that key presses on the keyboard 1685 * are missed. Given that, don't even attempt to use Absolute mode. 1686 * Relative mode seems to work just fine. 1687 */ 1688 if (broken_olpc_ec) { 1689 psmouse_info(psmouse, 1690 "OLPC XO detected, forcing relative protocol.\n"); 1691 absolute_mode = false; 1692 } 1693 1694 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1695 if (error) 1696 return error; 1697 1698 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1699 } 1700 1701 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1702 1703 void __init synaptics_module_init(void) 1704 { 1705 } 1706 1707 static int __maybe_unused 1708 synaptics_setup_ps2(struct psmouse *psmouse, 1709 struct synaptics_device_info *info) 1710 { 1711 return -ENOSYS; 1712 } 1713 1714 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1715 1716 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1717 1718 /* 1719 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1720 * provides a better bandwidth and allow a better control of the touchpads. 1721 * This is used to decide if we need to use this bus or not. 1722 */ 1723 enum { 1724 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1725 SYNAPTICS_INTERTOUCH_OFF, 1726 SYNAPTICS_INTERTOUCH_ON, 1727 }; 1728 1729 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1730 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1731 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1732 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1733 1734 static int synaptics_create_intertouch(struct psmouse *psmouse, 1735 struct synaptics_device_info *info, 1736 bool leave_breadcrumbs) 1737 { 1738 bool topbuttonpad = 1739 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1740 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1741 const struct rmi_device_platform_data pdata = { 1742 .sensor_pdata = { 1743 .sensor_type = rmi_sensor_touchpad, 1744 .axis_align.flip_y = true, 1745 .kernel_tracking = false, 1746 .topbuttonpad = topbuttonpad, 1747 }, 1748 .f30_data = { 1749 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1750 .trackstick_buttons = 1751 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1752 }, 1753 }; 1754 const struct i2c_board_info intertouch_board = { 1755 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1756 .flags = I2C_CLIENT_HOST_NOTIFY, 1757 }; 1758 1759 return psmouse_smbus_init(psmouse, &intertouch_board, 1760 &pdata, sizeof(pdata), true, 1761 leave_breadcrumbs); 1762 } 1763 1764 /** 1765 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1766 * and decides to instantiate a SMBus InterTouch device. 1767 */ 1768 static int synaptics_setup_intertouch(struct psmouse *psmouse, 1769 struct synaptics_device_info *info, 1770 bool leave_breadcrumbs) 1771 { 1772 int error; 1773 1774 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1775 return -ENXIO; 1776 1777 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1778 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1779 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1780 1781 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1782 psmouse_info(psmouse, 1783 "Your touchpad (%s) says it can support a different bus. " 1784 "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", 1785 psmouse->ps2dev.serio->firmware_id); 1786 1787 return -ENXIO; 1788 } 1789 } 1790 1791 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1792 1793 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1794 if (error) { 1795 if (error == -EAGAIN) 1796 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1797 else 1798 psmouse_err(psmouse, "unable to create intertouch device\n"); 1799 1800 return error; 1801 } 1802 1803 return 0; 1804 } 1805 1806 int synaptics_init_smbus(struct psmouse *psmouse) 1807 { 1808 struct synaptics_device_info info; 1809 int error; 1810 1811 psmouse_reset(psmouse); 1812 1813 error = synaptics_query_hardware(psmouse, &info); 1814 if (error) { 1815 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1816 return error; 1817 } 1818 1819 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1820 return -ENXIO; 1821 1822 return synaptics_create_intertouch(psmouse, &info, false); 1823 } 1824 1825 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1826 1827 static int __maybe_unused 1828 synaptics_setup_intertouch(struct psmouse *psmouse, 1829 struct synaptics_device_info *info, 1830 bool leave_breadcrumbs) 1831 { 1832 return -ENOSYS; 1833 } 1834 1835 int synaptics_init_smbus(struct psmouse *psmouse) 1836 { 1837 return -ENOSYS; 1838 } 1839 1840 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1841 1842 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1843 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1844 1845 int synaptics_init(struct psmouse *psmouse) 1846 { 1847 struct synaptics_device_info info; 1848 int error; 1849 int retval; 1850 1851 psmouse_reset(psmouse); 1852 1853 error = synaptics_query_hardware(psmouse, &info); 1854 if (error) { 1855 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1856 return error; 1857 } 1858 1859 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1860 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1861 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1862 /* Forcepads need F21, which is not ready */ 1863 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1864 psmouse_warn(psmouse, 1865 "The touchpad can support a better bus than the too old PS/2 protocol. " 1866 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1867 } 1868 1869 error = synaptics_setup_intertouch(psmouse, &info, true); 1870 if (!error) 1871 return PSMOUSE_SYNAPTICS_SMBUS; 1872 } 1873 1874 retval = synaptics_setup_ps2(psmouse, &info); 1875 if (retval < 0) { 1876 /* 1877 * Not using any flavor of Synaptics support, so clean up 1878 * SMbus breadcrumbs, if any. 1879 */ 1880 psmouse_smbus_cleanup(psmouse); 1881 } 1882 1883 return retval; 1884 } 1885 1886 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1887 1888 int synaptics_init(struct psmouse *psmouse) 1889 { 1890 return -ENOSYS; 1891 } 1892 1893 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1894