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