1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Synaptics TouchPad PS/2 mouse driver 4 * 5 * 2003 Dmitry Torokhov <dtor@mail.ru> 6 * Added support for pass-through port. Special thanks to Peter Berg Larsen 7 * for explaining various Synaptics quirks. 8 * 9 * 2003 Peter Osterlund <petero2@telia.com> 10 * Ported to 2.5 input device infrastructure. 11 * 12 * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch> 13 * start merging tpconfig and gpm code to a xfree-input module 14 * adding some changes and extensions (ex. 3rd and 4th button) 15 * 16 * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu> 17 * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com> 18 * code for the special synaptics commands (from the tpconfig-source) 19 * 20 * Trademarks are the property of their respective owners. 21 */ 22 23 #include <linux/module.h> 24 #include <linux/delay.h> 25 #include <linux/dmi.h> 26 #include <linux/input/mt.h> 27 #include <linux/serio.h> 28 #include <linux/libps2.h> 29 #include <linux/rmi.h> 30 #include <linux/i2c.h> 31 #include <linux/slab.h> 32 #include "psmouse.h" 33 #include "synaptics.h" 34 35 /* 36 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide, 37 * section 2.3.2, which says that they should be valid regardless of the 38 * actual size of the sensor. 39 * Note that newer firmware allows querying device for maximum useable 40 * coordinates. 41 */ 42 #define XMIN 0 43 #define XMAX 6143 44 #define YMIN 0 45 #define YMAX 6143 46 #define XMIN_NOMINAL 1472 47 #define XMAX_NOMINAL 5472 48 #define YMIN_NOMINAL 1408 49 #define YMAX_NOMINAL 4448 50 51 /* Size in bits of absolute position values reported by the hardware */ 52 #define ABS_POS_BITS 13 53 54 /* 55 * These values should represent the absolute maximum value that will 56 * be reported for a positive position value. Some Synaptics firmware 57 * uses this value to indicate a finger near the edge of the touchpad 58 * whose precise position cannot be determined. 59 * 60 * At least one touchpad is known to report positions in excess of this 61 * value which are actually negative values truncated to the 13-bit 62 * reporting range. These values have never been observed to be lower 63 * than 8184 (i.e. -8), so we treat all values greater than 8176 as 64 * negative and any other value as positive. 65 */ 66 #define X_MAX_POSITIVE 8176 67 #define Y_MAX_POSITIVE 8176 68 69 /* maximum ABS_MT_POSITION displacement (in mm) */ 70 #define DMAX 10 71 72 /***************************************************************************** 73 * Stuff we need even when we do not want native Synaptics support 74 ****************************************************************************/ 75 76 /* 77 * Set the synaptics touchpad mode byte by special commands 78 */ 79 static int synaptics_mode_cmd(struct psmouse *psmouse, u8 mode) 80 { 81 u8 param[1]; 82 int error; 83 84 error = ps2_sliced_command(&psmouse->ps2dev, mode); 85 if (error) 86 return error; 87 88 param[0] = SYN_PS_SET_MODE2; 89 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE); 90 if (error) 91 return error; 92 93 return 0; 94 } 95 96 int synaptics_detect(struct psmouse *psmouse, bool set_properties) 97 { 98 struct ps2dev *ps2dev = &psmouse->ps2dev; 99 u8 param[4] = { 0 }; 100 101 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 102 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 103 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 104 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 105 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 106 107 if (param[1] != 0x47) 108 return -ENODEV; 109 110 if (set_properties) { 111 psmouse->vendor = "Synaptics"; 112 psmouse->name = "TouchPad"; 113 } 114 115 return 0; 116 } 117 118 void synaptics_reset(struct psmouse *psmouse) 119 { 120 /* reset touchpad back to relative mode, gestures enabled */ 121 synaptics_mode_cmd(psmouse, 0); 122 } 123 124 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 125 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 126 127 /* This list has been kindly provided by Synaptics. */ 128 static const char * const topbuttonpad_pnp_ids[] = { 129 "LEN0017", 130 "LEN0018", 131 "LEN0019", 132 "LEN0023", 133 "LEN002A", 134 "LEN002B", 135 "LEN002C", 136 "LEN002D", 137 "LEN002E", 138 "LEN0033", /* Helix */ 139 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */ 140 "LEN0035", /* X240 */ 141 "LEN0036", /* T440 */ 142 "LEN0037", /* X1 Carbon 2nd */ 143 "LEN0038", 144 "LEN0039", /* T440s */ 145 "LEN0041", 146 "LEN0042", /* Yoga */ 147 "LEN0045", 148 "LEN0047", 149 "LEN2000", /* S540 */ 150 "LEN2001", /* Edge E431 */ 151 "LEN2002", /* Edge E531 */ 152 "LEN2003", 153 "LEN2004", /* L440 */ 154 "LEN2005", 155 "LEN2006", /* Edge E440/E540 */ 156 "LEN2007", 157 "LEN2008", 158 "LEN2009", 159 "LEN200A", 160 "LEN200B", 161 NULL 162 }; 163 164 static const char * const smbus_pnp_ids[] = { 165 /* all of the topbuttonpad_pnp_ids are valid, we just add some extras */ 166 "LEN0048", /* X1 Carbon 3 */ 167 "LEN0046", /* X250 */ 168 "LEN0049", /* Yoga 11e */ 169 "LEN004a", /* W541 */ 170 "LEN005b", /* P50 */ 171 "LEN005e", /* T560 */ 172 "LEN006c", /* T470s */ 173 "LEN0071", /* T480 */ 174 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 175 "LEN0073", /* X1 Carbon G5 (Elantech) */ 176 "LEN0091", /* X1 Carbon 6 */ 177 "LEN0092", /* X1 Carbon 6 */ 178 "LEN0093", /* T480 */ 179 "LEN0096", /* X280 */ 180 "LEN0097", /* X280 -> ALPS trackpoint */ 181 "LEN009b", /* T580 */ 182 "LEN200f", /* T450s */ 183 "LEN2044", /* L470 */ 184 "LEN2054", /* E480 */ 185 "LEN2055", /* E580 */ 186 "SYN3052", /* HP EliteBook 840 G4 */ 187 "SYN3221", /* HP 15-ay000 */ 188 "SYN323d", /* HP Spectre X360 13-w013dx */ 189 "SYN3257", /* HP Envy 13-ad105ng */ 190 NULL 191 }; 192 193 static const char * const forcepad_pnp_ids[] = { 194 "SYN300D", 195 "SYN3014", 196 NULL 197 }; 198 199 /* 200 * Send a command to the synaptics touchpad by special commands 201 */ 202 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 203 { 204 int error; 205 206 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 207 if (error) 208 return error; 209 210 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 211 if (error) 212 return error; 213 214 return 0; 215 } 216 217 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 218 { 219 int error; 220 union { 221 __be32 be_val; 222 char buf[4]; 223 } resp = { 0 }; 224 225 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 226 if (error) 227 return error; 228 229 *val = be32_to_cpu(resp.be_val); 230 return 0; 231 } 232 233 /* 234 * Identify Touchpad 235 * See also the SYN_ID_* macros 236 */ 237 static int synaptics_identify(struct psmouse *psmouse, 238 struct synaptics_device_info *info) 239 { 240 int error; 241 242 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 243 if (error) 244 return error; 245 246 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 247 } 248 249 /* 250 * Read the model-id bytes from the touchpad 251 * see also SYN_MODEL_* macros 252 */ 253 static int synaptics_model_id(struct psmouse *psmouse, 254 struct synaptics_device_info *info) 255 { 256 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 257 } 258 259 /* 260 * Read the firmware id from the touchpad 261 */ 262 static int synaptics_firmware_id(struct psmouse *psmouse, 263 struct synaptics_device_info *info) 264 { 265 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 266 &info->firmware_id); 267 } 268 269 /* 270 * Read the board id and the "More Extended Queries" from the touchpad 271 * The board id is encoded in the "QUERY MODES" response 272 */ 273 static int synaptics_query_modes(struct psmouse *psmouse, 274 struct synaptics_device_info *info) 275 { 276 u8 bid[3]; 277 int error; 278 279 /* firmwares prior 7.5 have no board_id encoded */ 280 if (SYN_ID_FULL(info->identity) < 0x705) 281 return 0; 282 283 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 284 if (error) 285 return error; 286 287 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 288 289 if (SYN_MEXT_CAP_BIT(bid[0])) 290 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 291 &info->ext_cap_10); 292 293 return 0; 294 } 295 296 /* 297 * Read the capability-bits from the touchpad 298 * see also the SYN_CAP_* macros 299 */ 300 static int synaptics_capability(struct psmouse *psmouse, 301 struct synaptics_device_info *info) 302 { 303 int error; 304 305 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 306 &info->capabilities); 307 if (error) 308 return error; 309 310 info->ext_cap = info->ext_cap_0c = 0; 311 312 /* 313 * Older firmwares had submodel ID fixed to 0x47 314 */ 315 if (SYN_ID_FULL(info->identity) < 0x705 && 316 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 317 return -ENXIO; 318 } 319 320 /* 321 * Unless capExtended is set the rest of the flags should be ignored 322 */ 323 if (!SYN_CAP_EXTENDED(info->capabilities)) 324 info->capabilities = 0; 325 326 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 327 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 328 &info->ext_cap); 329 if (error) { 330 psmouse_warn(psmouse, 331 "device claims to have extended capabilities, but I'm not able to read them.\n"); 332 } else { 333 /* 334 * if nExtBtn is greater than 8 it should be considered 335 * invalid and treated as 0 336 */ 337 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 338 info->ext_cap &= ~SYN_CAP_MB_MASK; 339 } 340 } 341 342 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 343 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 344 &info->ext_cap_0c); 345 if (error) 346 psmouse_warn(psmouse, 347 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 348 } 349 350 return 0; 351 } 352 353 /* 354 * Read touchpad resolution and maximum reported coordinates 355 * Resolution is left zero if touchpad does not support the query 356 */ 357 static int synaptics_resolution(struct psmouse *psmouse, 358 struct synaptics_device_info *info) 359 { 360 u8 resp[3]; 361 int error; 362 363 if (SYN_ID_MAJOR(info->identity) < 4) 364 return 0; 365 366 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 367 if (!error) { 368 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 369 info->x_res = resp[0]; /* x resolution in units/mm */ 370 info->y_res = resp[2]; /* y resolution in units/mm */ 371 } 372 } 373 374 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 375 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 376 error = synaptics_send_cmd(psmouse, 377 SYN_QUE_EXT_MAX_COORDS, resp); 378 if (error) { 379 psmouse_warn(psmouse, 380 "device claims to have max coordinates query, but I'm not able to read it.\n"); 381 } else { 382 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 383 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 384 psmouse_info(psmouse, 385 "queried max coordinates: x [..%d], y [..%d]\n", 386 info->x_max, info->y_max); 387 } 388 } 389 390 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 391 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 392 /* 393 * Firmware v8.1 does not report proper number of extended 394 * capabilities, but has been proven to report correct min 395 * coordinates. 396 */ 397 SYN_ID_FULL(info->identity) == 0x801)) { 398 error = synaptics_send_cmd(psmouse, 399 SYN_QUE_EXT_MIN_COORDS, resp); 400 if (error) { 401 psmouse_warn(psmouse, 402 "device claims to have min coordinates query, but I'm not able to read it.\n"); 403 } else { 404 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 405 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 406 psmouse_info(psmouse, 407 "queried min coordinates: x [%d..], y [%d..]\n", 408 info->x_min, info->y_min); 409 } 410 } 411 412 return 0; 413 } 414 415 static int synaptics_query_hardware(struct psmouse *psmouse, 416 struct synaptics_device_info *info) 417 { 418 int error; 419 420 memset(info, 0, sizeof(*info)); 421 422 error = synaptics_identify(psmouse, info); 423 if (error) 424 return error; 425 426 error = synaptics_model_id(psmouse, info); 427 if (error) 428 return error; 429 430 error = synaptics_firmware_id(psmouse, info); 431 if (error) 432 return error; 433 434 error = synaptics_query_modes(psmouse, info); 435 if (error) 436 return error; 437 438 error = synaptics_capability(psmouse, info); 439 if (error) 440 return error; 441 442 error = synaptics_resolution(psmouse, info); 443 if (error) 444 return error; 445 446 return 0; 447 } 448 449 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 450 451 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 452 453 static bool cr48_profile_sensor; 454 455 #define ANY_BOARD_ID 0 456 struct min_max_quirk { 457 const char * const *pnp_ids; 458 struct { 459 u32 min, max; 460 } board_id; 461 u32 x_min, x_max, y_min, y_max; 462 }; 463 464 static const struct min_max_quirk min_max_pnpid_table[] = { 465 { 466 (const char * const []){"LEN0033", NULL}, 467 {ANY_BOARD_ID, ANY_BOARD_ID}, 468 1024, 5052, 2258, 4832 469 }, 470 { 471 (const char * const []){"LEN0042", NULL}, 472 {ANY_BOARD_ID, ANY_BOARD_ID}, 473 1232, 5710, 1156, 4696 474 }, 475 { 476 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 477 "LEN0039", "LEN2002", "LEN2004", 478 NULL}, 479 {ANY_BOARD_ID, 2961}, 480 1024, 5112, 2024, 4832 481 }, 482 { 483 (const char * const []){"LEN2000", NULL}, 484 {ANY_BOARD_ID, ANY_BOARD_ID}, 485 1024, 5113, 2021, 4832 486 }, 487 { 488 (const char * const []){"LEN2001", NULL}, 489 {ANY_BOARD_ID, ANY_BOARD_ID}, 490 1024, 5022, 2508, 4832 491 }, 492 { 493 (const char * const []){"LEN2006", NULL}, 494 {2691, 2691}, 495 1024, 5045, 2457, 4832 496 }, 497 { 498 (const char * const []){"LEN2006", NULL}, 499 {ANY_BOARD_ID, ANY_BOARD_ID}, 500 1264, 5675, 1171, 4688 501 }, 502 { } 503 }; 504 505 /***************************************************************************** 506 * Synaptics communications functions 507 ****************************************************************************/ 508 509 /* 510 * Synaptics touchpads report the y coordinate from bottom to top, which is 511 * opposite from what userspace expects. 512 * This function is used to invert y before reporting. 513 */ 514 static int synaptics_invert_y(int y) 515 { 516 return YMAX_NOMINAL + YMIN_NOMINAL - y; 517 } 518 519 /* 520 * Apply quirk(s) if the hardware matches 521 */ 522 static void synaptics_apply_quirks(struct psmouse *psmouse, 523 struct synaptics_device_info *info) 524 { 525 int i; 526 527 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 528 if (!psmouse_matches_pnp_id(psmouse, 529 min_max_pnpid_table[i].pnp_ids)) 530 continue; 531 532 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 533 info->board_id < min_max_pnpid_table[i].board_id.min) 534 continue; 535 536 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 537 info->board_id > min_max_pnpid_table[i].board_id.max) 538 continue; 539 540 info->x_min = min_max_pnpid_table[i].x_min; 541 info->x_max = min_max_pnpid_table[i].x_max; 542 info->y_min = min_max_pnpid_table[i].y_min; 543 info->y_max = min_max_pnpid_table[i].y_max; 544 psmouse_info(psmouse, 545 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 546 info->x_min, info->x_max, 547 info->y_min, info->y_max); 548 break; 549 } 550 } 551 552 static bool synaptics_has_agm(struct synaptics_data *priv) 553 { 554 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 555 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 556 } 557 558 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 559 { 560 static u8 param = 0xc8; 561 int error; 562 563 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 564 if (error) 565 return error; 566 567 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 568 if (error) 569 return error; 570 571 return 0; 572 } 573 574 static int synaptics_set_mode(struct psmouse *psmouse) 575 { 576 struct synaptics_data *priv = psmouse->private; 577 int error; 578 579 priv->mode = 0; 580 if (priv->absolute_mode) 581 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 582 if (priv->disable_gesture) 583 priv->mode |= SYN_BIT_DISABLE_GESTURE; 584 if (psmouse->rate >= 80) 585 priv->mode |= SYN_BIT_HIGH_RATE; 586 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 587 priv->mode |= SYN_BIT_W_MODE; 588 589 error = synaptics_mode_cmd(psmouse, priv->mode); 590 if (error) 591 return error; 592 593 if (priv->absolute_mode && synaptics_has_agm(priv)) { 594 error = synaptics_set_advanced_gesture_mode(psmouse); 595 if (error) { 596 psmouse_err(psmouse, 597 "Advanced gesture mode init failed: %d\n", 598 error); 599 return error; 600 } 601 } 602 603 return 0; 604 } 605 606 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 607 { 608 struct synaptics_data *priv = psmouse->private; 609 610 if (rate >= 80) { 611 priv->mode |= SYN_BIT_HIGH_RATE; 612 psmouse->rate = 80; 613 } else { 614 priv->mode &= ~SYN_BIT_HIGH_RATE; 615 psmouse->rate = 40; 616 } 617 618 synaptics_mode_cmd(psmouse, priv->mode); 619 } 620 621 /***************************************************************************** 622 * Synaptics pass-through PS/2 port support 623 ****************************************************************************/ 624 static int synaptics_pt_write(struct serio *serio, u8 c) 625 { 626 struct psmouse *parent = serio_get_drvdata(serio->parent); 627 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 628 int error; 629 630 error = ps2_sliced_command(&parent->ps2dev, c); 631 if (error) 632 return error; 633 634 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 635 if (error) 636 return error; 637 638 return 0; 639 } 640 641 static int synaptics_pt_start(struct serio *serio) 642 { 643 struct psmouse *parent = serio_get_drvdata(serio->parent); 644 struct synaptics_data *priv = parent->private; 645 646 serio_pause_rx(parent->ps2dev.serio); 647 priv->pt_port = serio; 648 serio_continue_rx(parent->ps2dev.serio); 649 650 return 0; 651 } 652 653 static void synaptics_pt_stop(struct serio *serio) 654 { 655 struct psmouse *parent = serio_get_drvdata(serio->parent); 656 struct synaptics_data *priv = parent->private; 657 658 serio_pause_rx(parent->ps2dev.serio); 659 priv->pt_port = NULL; 660 serio_continue_rx(parent->ps2dev.serio); 661 } 662 663 static int synaptics_is_pt_packet(u8 *buf) 664 { 665 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 666 } 667 668 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet) 669 { 670 struct psmouse *child = serio_get_drvdata(ptport); 671 672 if (child && child->state == PSMOUSE_ACTIVATED) { 673 serio_interrupt(ptport, packet[1], 0); 674 serio_interrupt(ptport, packet[4], 0); 675 serio_interrupt(ptport, packet[5], 0); 676 if (child->pktsize == 4) 677 serio_interrupt(ptport, packet[2], 0); 678 } else { 679 serio_interrupt(ptport, packet[1], 0); 680 } 681 } 682 683 static void synaptics_pt_activate(struct psmouse *psmouse) 684 { 685 struct synaptics_data *priv = psmouse->private; 686 struct psmouse *child = serio_get_drvdata(priv->pt_port); 687 688 /* adjust the touchpad to child's choice of protocol */ 689 if (child) { 690 if (child->pktsize == 4) 691 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 692 else 693 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 694 695 if (synaptics_mode_cmd(psmouse, priv->mode)) 696 psmouse_warn(psmouse, 697 "failed to switch guest protocol\n"); 698 } 699 } 700 701 static void synaptics_pt_create(struct psmouse *psmouse) 702 { 703 struct serio *serio; 704 705 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 706 if (!serio) { 707 psmouse_err(psmouse, 708 "not enough memory for pass-through port\n"); 709 return; 710 } 711 712 serio->id.type = SERIO_PS_PSTHRU; 713 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 714 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 715 serio->write = synaptics_pt_write; 716 serio->start = synaptics_pt_start; 717 serio->stop = synaptics_pt_stop; 718 serio->parent = psmouse->ps2dev.serio; 719 720 psmouse->pt_activate = synaptics_pt_activate; 721 722 psmouse_info(psmouse, "serio: %s port at %s\n", 723 serio->name, psmouse->phys); 724 serio_register_port(serio); 725 } 726 727 /***************************************************************************** 728 * Functions to interpret the absolute mode packets 729 ****************************************************************************/ 730 731 static void synaptics_parse_agm(const u8 buf[], 732 struct synaptics_data *priv, 733 struct synaptics_hw_state *hw) 734 { 735 struct synaptics_hw_state *agm = &priv->agm; 736 int agm_packet_type; 737 738 agm_packet_type = (buf[5] & 0x30) >> 4; 739 switch (agm_packet_type) { 740 case 1: 741 /* Gesture packet: (x, y, z) half resolution */ 742 agm->w = hw->w; 743 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 744 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 745 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 746 break; 747 748 case 2: 749 /* AGM-CONTACT packet: we are only interested in the count */ 750 priv->agm_count = buf[1]; 751 break; 752 753 default: 754 break; 755 } 756 } 757 758 static void synaptics_parse_ext_buttons(const u8 buf[], 759 struct synaptics_data *priv, 760 struct synaptics_hw_state *hw) 761 { 762 unsigned int ext_bits = 763 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 764 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 765 766 hw->ext_buttons = buf[4] & ext_mask; 767 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 768 } 769 770 static int synaptics_parse_hw_state(const u8 buf[], 771 struct synaptics_data *priv, 772 struct synaptics_hw_state *hw) 773 { 774 memset(hw, 0, sizeof(struct synaptics_hw_state)); 775 776 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 777 hw->w = (((buf[0] & 0x30) >> 2) | 778 ((buf[0] & 0x04) >> 1) | 779 ((buf[3] & 0x04) >> 2)); 780 781 if (synaptics_has_agm(priv) && hw->w == 2) { 782 synaptics_parse_agm(buf, priv, hw); 783 return 1; 784 } 785 786 hw->x = (((buf[3] & 0x10) << 8) | 787 ((buf[1] & 0x0f) << 8) | 788 buf[4]); 789 hw->y = (((buf[3] & 0x20) << 7) | 790 ((buf[1] & 0xf0) << 4) | 791 buf[5]); 792 hw->z = buf[2]; 793 794 hw->left = (buf[0] & 0x01) ? 1 : 0; 795 hw->right = (buf[0] & 0x02) ? 1 : 0; 796 797 if (priv->is_forcepad) { 798 /* 799 * ForcePads, like Clickpads, use middle button 800 * bits to report primary button clicks. 801 * Unfortunately they report primary button not 802 * only when user presses on the pad above certain 803 * threshold, but also when there are more than one 804 * finger on the touchpad, which interferes with 805 * out multi-finger gestures. 806 */ 807 if (hw->z == 0) { 808 /* No contacts */ 809 priv->press = priv->report_press = false; 810 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 811 /* 812 * Single-finger touch with pressure above 813 * the threshold. If pressure stays long 814 * enough, we'll start reporting primary 815 * button. We rely on the device continuing 816 * sending data even if finger does not 817 * move. 818 */ 819 if (!priv->press) { 820 priv->press_start = jiffies; 821 priv->press = true; 822 } else if (time_after(jiffies, 823 priv->press_start + 824 msecs_to_jiffies(50))) { 825 priv->report_press = true; 826 } 827 } else { 828 priv->press = false; 829 } 830 831 hw->left = priv->report_press; 832 833 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 834 /* 835 * Clickpad's button is transmitted as middle button, 836 * however, since it is primary button, we will report 837 * it as BTN_LEFT. 838 */ 839 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 840 841 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 842 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 843 if (hw->w == 2) 844 hw->scroll = (s8)buf[1]; 845 } 846 847 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 848 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 849 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 850 } 851 852 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 853 ((buf[0] ^ buf[3]) & 0x02)) { 854 synaptics_parse_ext_buttons(buf, priv, hw); 855 } 856 } else { 857 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 858 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 859 860 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 861 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 862 863 hw->left = (buf[0] & 0x01) ? 1 : 0; 864 hw->right = (buf[0] & 0x02) ? 1 : 0; 865 } 866 867 /* 868 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 869 * is used by some firmware to indicate a finger at the edge of 870 * the touchpad whose precise position cannot be determined, so 871 * convert these values to the maximum axis value. 872 */ 873 if (hw->x > X_MAX_POSITIVE) 874 hw->x -= 1 << ABS_POS_BITS; 875 else if (hw->x == X_MAX_POSITIVE) 876 hw->x = XMAX; 877 878 if (hw->y > Y_MAX_POSITIVE) 879 hw->y -= 1 << ABS_POS_BITS; 880 else if (hw->y == Y_MAX_POSITIVE) 881 hw->y = YMAX; 882 883 return 0; 884 } 885 886 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 887 bool active, int x, int y) 888 { 889 input_mt_slot(dev, slot); 890 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 891 if (active) { 892 input_report_abs(dev, ABS_MT_POSITION_X, x); 893 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 894 } 895 } 896 897 static void synaptics_report_semi_mt_data(struct input_dev *dev, 898 const struct synaptics_hw_state *a, 899 const struct synaptics_hw_state *b, 900 int num_fingers) 901 { 902 if (num_fingers >= 2) { 903 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 904 min(a->y, b->y)); 905 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 906 max(a->y, b->y)); 907 } else if (num_fingers == 1) { 908 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 909 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 910 } else { 911 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 912 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 913 } 914 } 915 916 static void synaptics_report_ext_buttons(struct psmouse *psmouse, 917 const struct synaptics_hw_state *hw) 918 { 919 struct input_dev *dev = psmouse->dev; 920 struct synaptics_data *priv = psmouse->private; 921 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 922 int i; 923 924 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 925 return; 926 927 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 928 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 929 SYN_ID_FULL(priv->info.identity) == 0x802) && 930 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 931 return; 932 933 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 934 for (i = 0; i < ext_bits; i++) { 935 input_report_key(dev, BTN_0 + 2 * i, 936 hw->ext_buttons & BIT(i)); 937 input_report_key(dev, BTN_1 + 2 * i, 938 hw->ext_buttons & BIT(i + ext_bits)); 939 } 940 return; 941 } 942 943 /* 944 * This generation of touchpads has the trackstick buttons 945 * physically wired to the touchpad. Re-route them through 946 * the pass-through interface. 947 */ 948 if (priv->pt_port) { 949 u8 pt_buttons; 950 951 /* The trackstick expects at most 3 buttons */ 952 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 953 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 954 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 955 956 serio_interrupt(priv->pt_port, 957 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 958 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 959 } 960 } 961 962 static void synaptics_report_buttons(struct psmouse *psmouse, 963 const struct synaptics_hw_state *hw) 964 { 965 struct input_dev *dev = psmouse->dev; 966 struct synaptics_data *priv = psmouse->private; 967 968 input_report_key(dev, BTN_LEFT, hw->left); 969 input_report_key(dev, BTN_RIGHT, hw->right); 970 971 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 972 input_report_key(dev, BTN_MIDDLE, hw->middle); 973 974 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 975 input_report_key(dev, BTN_FORWARD, hw->up); 976 input_report_key(dev, BTN_BACK, hw->down); 977 } 978 979 synaptics_report_ext_buttons(psmouse, hw); 980 } 981 982 static void synaptics_report_mt_data(struct psmouse *psmouse, 983 const struct synaptics_hw_state *sgm, 984 int num_fingers) 985 { 986 struct input_dev *dev = psmouse->dev; 987 struct synaptics_data *priv = psmouse->private; 988 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 989 struct input_mt_pos pos[2]; 990 int slot[2], nsemi, i; 991 992 nsemi = clamp_val(num_fingers, 0, 2); 993 994 for (i = 0; i < nsemi; i++) { 995 pos[i].x = hw[i]->x; 996 pos[i].y = synaptics_invert_y(hw[i]->y); 997 } 998 999 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 1000 1001 for (i = 0; i < nsemi; i++) { 1002 input_mt_slot(dev, slot[i]); 1003 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1004 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1005 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1006 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1007 } 1008 1009 input_mt_drop_unused(dev); 1010 1011 /* Don't use active slot count to generate BTN_TOOL events. */ 1012 input_mt_report_pointer_emulation(dev, false); 1013 1014 /* Send the number of fingers reported by touchpad itself. */ 1015 input_mt_report_finger_count(dev, num_fingers); 1016 1017 synaptics_report_buttons(psmouse, sgm); 1018 1019 input_sync(dev); 1020 } 1021 1022 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1023 struct synaptics_hw_state *sgm) 1024 { 1025 struct synaptics_data *priv = psmouse->private; 1026 int num_fingers; 1027 1028 /* 1029 * Update mt_state using the new finger count and current mt_state. 1030 */ 1031 if (sgm->z == 0) 1032 num_fingers = 0; 1033 else if (sgm->w >= 4) 1034 num_fingers = 1; 1035 else if (sgm->w == 0) 1036 num_fingers = 2; 1037 else if (sgm->w == 1) 1038 num_fingers = priv->agm_count ? priv->agm_count : 3; 1039 else 1040 num_fingers = 4; 1041 1042 /* Send resulting input events to user space */ 1043 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1044 } 1045 1046 static bool synaptics_has_multifinger(struct synaptics_data *priv) 1047 { 1048 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1049 return true; 1050 1051 /* Advanced gesture mode also sends multi finger data */ 1052 return synaptics_has_agm(priv); 1053 } 1054 1055 /* 1056 * called for each full received packet from the touchpad 1057 */ 1058 static void synaptics_process_packet(struct psmouse *psmouse) 1059 { 1060 struct input_dev *dev = psmouse->dev; 1061 struct synaptics_data *priv = psmouse->private; 1062 struct synaptics_device_info *info = &priv->info; 1063 struct synaptics_hw_state hw; 1064 int num_fingers; 1065 int finger_width; 1066 1067 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1068 return; 1069 1070 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1071 synaptics_image_sensor_process(psmouse, &hw); 1072 return; 1073 } 1074 1075 if (hw.scroll) { 1076 priv->scroll += hw.scroll; 1077 1078 while (priv->scroll >= 4) { 1079 input_report_key(dev, BTN_BACK, !hw.down); 1080 input_sync(dev); 1081 input_report_key(dev, BTN_BACK, hw.down); 1082 input_sync(dev); 1083 priv->scroll -= 4; 1084 } 1085 while (priv->scroll <= -4) { 1086 input_report_key(dev, BTN_FORWARD, !hw.up); 1087 input_sync(dev); 1088 input_report_key(dev, BTN_FORWARD, hw.up); 1089 input_sync(dev); 1090 priv->scroll += 4; 1091 } 1092 return; 1093 } 1094 1095 if (hw.z > 0 && hw.x > 1) { 1096 num_fingers = 1; 1097 finger_width = 5; 1098 if (SYN_CAP_EXTENDED(info->capabilities)) { 1099 switch (hw.w) { 1100 case 0 ... 1: 1101 if (synaptics_has_multifinger(priv)) 1102 num_fingers = hw.w + 2; 1103 break; 1104 case 2: 1105 if (SYN_MODEL_PEN(info->model_id)) 1106 ; /* Nothing, treat a pen as a single finger */ 1107 break; 1108 case 4 ... 15: 1109 if (SYN_CAP_PALMDETECT(info->capabilities)) 1110 finger_width = hw.w; 1111 break; 1112 } 1113 } 1114 } else { 1115 num_fingers = 0; 1116 finger_width = 0; 1117 } 1118 1119 if (cr48_profile_sensor) { 1120 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1121 return; 1122 } 1123 1124 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1125 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1126 num_fingers); 1127 1128 /* Post events 1129 * BTN_TOUCH has to be first as mousedev relies on it when doing 1130 * absolute -> relative conversion 1131 */ 1132 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1133 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1134 1135 if (num_fingers > 0) { 1136 input_report_abs(dev, ABS_X, hw.x); 1137 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1138 } 1139 input_report_abs(dev, ABS_PRESSURE, hw.z); 1140 1141 if (SYN_CAP_PALMDETECT(info->capabilities)) 1142 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1143 1144 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1145 if (synaptics_has_multifinger(priv)) { 1146 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1147 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1148 } 1149 1150 synaptics_report_buttons(psmouse, &hw); 1151 1152 input_sync(dev); 1153 } 1154 1155 static bool synaptics_validate_byte(struct psmouse *psmouse, 1156 int idx, enum synaptics_pkt_type pkt_type) 1157 { 1158 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1159 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1160 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1161 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1162 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1163 const u8 *packet = psmouse->packet; 1164 1165 if (idx < 0 || idx > 4) 1166 return false; 1167 1168 switch (pkt_type) { 1169 1170 case SYN_NEWABS: 1171 case SYN_NEWABS_RELAXED: 1172 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1173 1174 case SYN_NEWABS_STRICT: 1175 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1176 1177 case SYN_OLDABS: 1178 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1179 1180 default: 1181 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1182 return false; 1183 } 1184 } 1185 1186 static enum synaptics_pkt_type 1187 synaptics_detect_pkt_type(struct psmouse *psmouse) 1188 { 1189 int i; 1190 1191 for (i = 0; i < 5; i++) { 1192 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1193 psmouse_info(psmouse, "using relaxed packet validation\n"); 1194 return SYN_NEWABS_RELAXED; 1195 } 1196 } 1197 1198 return SYN_NEWABS_STRICT; 1199 } 1200 1201 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1202 { 1203 struct synaptics_data *priv = psmouse->private; 1204 1205 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1206 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1207 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1208 1209 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1210 synaptics_is_pt_packet(psmouse->packet)) { 1211 if (priv->pt_port) 1212 synaptics_pass_pt_packet(priv->pt_port, 1213 psmouse->packet); 1214 } else 1215 synaptics_process_packet(psmouse); 1216 1217 return PSMOUSE_FULL_PACKET; 1218 } 1219 1220 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1221 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1222 } 1223 1224 /***************************************************************************** 1225 * Driver initialization/cleanup functions 1226 ****************************************************************************/ 1227 static void set_abs_position_params(struct input_dev *dev, 1228 struct synaptics_device_info *info, 1229 int x_code, int y_code) 1230 { 1231 int x_min = info->x_min ?: XMIN_NOMINAL; 1232 int x_max = info->x_max ?: XMAX_NOMINAL; 1233 int y_min = info->y_min ?: YMIN_NOMINAL; 1234 int y_max = info->y_max ?: YMAX_NOMINAL; 1235 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1236 SYN_REDUCED_FILTER_FUZZ : 0; 1237 1238 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1239 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1240 input_abs_set_res(dev, x_code, info->x_res); 1241 input_abs_set_res(dev, y_code, info->y_res); 1242 } 1243 1244 static int set_input_params(struct psmouse *psmouse, 1245 struct synaptics_data *priv) 1246 { 1247 struct input_dev *dev = psmouse->dev; 1248 struct synaptics_device_info *info = &priv->info; 1249 int i; 1250 int error; 1251 1252 /* Reset default psmouse capabilities */ 1253 __clear_bit(EV_REL, dev->evbit); 1254 bitmap_zero(dev->relbit, REL_CNT); 1255 bitmap_zero(dev->keybit, KEY_CNT); 1256 1257 /* Things that apply to both modes */ 1258 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1259 1260 input_set_capability(dev, EV_KEY, BTN_LEFT); 1261 1262 /* Clickpads report only left button */ 1263 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1264 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1265 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1266 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1267 } 1268 1269 if (!priv->absolute_mode) { 1270 /* Relative mode */ 1271 input_set_capability(dev, EV_REL, REL_X); 1272 input_set_capability(dev, EV_REL, REL_Y); 1273 return 0; 1274 } 1275 1276 /* Absolute mode */ 1277 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1278 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1279 1280 if (cr48_profile_sensor) 1281 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1282 1283 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1284 set_abs_position_params(dev, info, 1285 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1286 /* Image sensors can report per-contact pressure */ 1287 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1288 1289 error = input_mt_init_slots(dev, 2, 1290 INPUT_MT_POINTER | INPUT_MT_TRACK); 1291 if (error) 1292 return error; 1293 1294 /* Image sensors can signal 4 and 5 finger clicks */ 1295 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1296 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1297 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1298 set_abs_position_params(dev, info, 1299 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1300 /* 1301 * Profile sensor in CR-48 tracks contacts reasonably well, 1302 * other non-image sensors with AGM use semi-mt. 1303 */ 1304 error = input_mt_init_slots(dev, 2, 1305 INPUT_MT_POINTER | 1306 (cr48_profile_sensor ? 1307 INPUT_MT_TRACK : 1308 INPUT_MT_SEMI_MT)); 1309 if (error) 1310 return error; 1311 1312 /* 1313 * For semi-mt devices we send ABS_X/Y ourselves instead of 1314 * input_mt_report_pointer_emulation. But 1315 * input_mt_init_slots() resets the fuzz to 0, leading to a 1316 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1317 * position. Let's re-initialize ABS_X/Y here. 1318 */ 1319 if (!cr48_profile_sensor) 1320 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1321 } 1322 1323 if (SYN_CAP_PALMDETECT(info->capabilities)) 1324 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1325 1326 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1327 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1328 1329 if (synaptics_has_multifinger(priv)) { 1330 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1331 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1332 } 1333 1334 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1335 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1336 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1337 input_set_capability(dev, EV_KEY, BTN_BACK); 1338 } 1339 1340 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1341 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1342 input_set_capability(dev, EV_KEY, BTN_0 + i); 1343 1344 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1345 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1346 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1347 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1348 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1349 } 1350 1351 return 0; 1352 } 1353 1354 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1355 void *data, char *buf) 1356 { 1357 struct synaptics_data *priv = psmouse->private; 1358 1359 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1360 } 1361 1362 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1363 void *data, const char *buf, 1364 size_t len) 1365 { 1366 struct synaptics_data *priv = psmouse->private; 1367 unsigned int value; 1368 int err; 1369 1370 err = kstrtouint(buf, 10, &value); 1371 if (err) 1372 return err; 1373 1374 if (value > 1) 1375 return -EINVAL; 1376 1377 if (value == priv->disable_gesture) 1378 return len; 1379 1380 priv->disable_gesture = value; 1381 if (value) 1382 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1383 else 1384 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1385 1386 if (synaptics_mode_cmd(psmouse, priv->mode)) 1387 return -EIO; 1388 1389 return len; 1390 } 1391 1392 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1393 synaptics_show_disable_gesture, 1394 synaptics_set_disable_gesture); 1395 1396 static void synaptics_disconnect(struct psmouse *psmouse) 1397 { 1398 struct synaptics_data *priv = psmouse->private; 1399 1400 /* 1401 * We might have left a breadcrumb when trying to 1402 * set up SMbus companion. 1403 */ 1404 psmouse_smbus_cleanup(psmouse); 1405 1406 if (!priv->absolute_mode && 1407 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1408 device_remove_file(&psmouse->ps2dev.serio->dev, 1409 &psmouse_attr_disable_gesture.dattr); 1410 1411 synaptics_reset(psmouse); 1412 kfree(priv); 1413 psmouse->private = NULL; 1414 } 1415 1416 static int synaptics_reconnect(struct psmouse *psmouse) 1417 { 1418 struct synaptics_data *priv = psmouse->private; 1419 struct synaptics_device_info info; 1420 u8 param[2]; 1421 int retry = 0; 1422 int error; 1423 1424 do { 1425 psmouse_reset(psmouse); 1426 if (retry) { 1427 /* 1428 * On some boxes, right after resuming, the touchpad 1429 * needs some time to finish initializing (I assume 1430 * it needs time to calibrate) and start responding 1431 * to Synaptics-specific queries, so let's wait a 1432 * bit. 1433 */ 1434 ssleep(1); 1435 } 1436 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1437 error = synaptics_detect(psmouse, 0); 1438 } while (error && ++retry < 3); 1439 1440 if (error) 1441 return error; 1442 1443 if (retry > 1) 1444 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1445 1446 error = synaptics_query_hardware(psmouse, &info); 1447 if (error) { 1448 psmouse_err(psmouse, "Unable to query device.\n"); 1449 return error; 1450 } 1451 1452 error = synaptics_set_mode(psmouse); 1453 if (error) { 1454 psmouse_err(psmouse, "Unable to initialize device.\n"); 1455 return error; 1456 } 1457 1458 if (info.identity != priv->info.identity || 1459 info.model_id != priv->info.model_id || 1460 info.capabilities != priv->info.capabilities || 1461 info.ext_cap != priv->info.ext_cap) { 1462 psmouse_err(psmouse, 1463 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1464 priv->info.identity, info.identity, 1465 priv->info.model_id, info.model_id, 1466 priv->info.capabilities, info.capabilities, 1467 priv->info.ext_cap, info.ext_cap); 1468 return -ENXIO; 1469 } 1470 1471 return 0; 1472 } 1473 1474 static bool impaired_toshiba_kbc; 1475 1476 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1477 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1478 { 1479 /* Toshiba Satellite */ 1480 .matches = { 1481 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1482 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1483 }, 1484 }, 1485 { 1486 /* Toshiba Dynabook */ 1487 .matches = { 1488 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1489 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1490 }, 1491 }, 1492 { 1493 /* Toshiba Portege M300 */ 1494 .matches = { 1495 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1496 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1497 }, 1498 1499 }, 1500 { 1501 /* Toshiba Portege M300 */ 1502 .matches = { 1503 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1504 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1505 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1506 }, 1507 1508 }, 1509 #endif 1510 { } 1511 }; 1512 1513 static bool broken_olpc_ec; 1514 1515 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1516 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1517 { 1518 /* OLPC XO-1 or XO-1.5 */ 1519 .matches = { 1520 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1521 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1522 }, 1523 }, 1524 #endif 1525 { } 1526 }; 1527 1528 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1529 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1530 { 1531 /* Cr-48 Chromebook (Codename Mario) */ 1532 .matches = { 1533 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1534 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1535 }, 1536 }, 1537 #endif 1538 { } 1539 }; 1540 1541 void __init synaptics_module_init(void) 1542 { 1543 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1544 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1545 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1546 } 1547 1548 static int synaptics_init_ps2(struct psmouse *psmouse, 1549 struct synaptics_device_info *info, 1550 bool absolute_mode) 1551 { 1552 struct synaptics_data *priv; 1553 int err; 1554 1555 synaptics_apply_quirks(psmouse, info); 1556 1557 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1558 if (!priv) 1559 return -ENOMEM; 1560 1561 priv->info = *info; 1562 priv->absolute_mode = absolute_mode; 1563 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1564 priv->disable_gesture = true; 1565 1566 /* 1567 * Unfortunately ForcePad capability is not exported over PS/2, 1568 * so we have to resort to checking PNP IDs. 1569 */ 1570 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1571 1572 err = synaptics_set_mode(psmouse); 1573 if (err) { 1574 psmouse_err(psmouse, "Unable to initialize device.\n"); 1575 goto init_fail; 1576 } 1577 1578 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1579 SYN_NEWABS : SYN_OLDABS; 1580 1581 psmouse_info(psmouse, 1582 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1583 SYN_ID_MODEL(info->identity), 1584 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1585 info->model_id, 1586 info->capabilities, info->ext_cap, info->ext_cap_0c, 1587 info->ext_cap_10, info->board_id, info->firmware_id); 1588 1589 err = set_input_params(psmouse, priv); 1590 if (err) { 1591 psmouse_err(psmouse, 1592 "failed to set up capabilities: %d\n", err); 1593 goto init_fail; 1594 } 1595 1596 /* 1597 * Encode touchpad model so that it can be used to set 1598 * input device->id.version and be visible to userspace. 1599 * Because version is __u16 we have to drop something. 1600 * Hardware info bits seem to be good candidates as they 1601 * are documented to be for Synaptics corp. internal use. 1602 */ 1603 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1604 (info->model_id & 0x000000ff); 1605 1606 if (absolute_mode) { 1607 psmouse->protocol_handler = synaptics_process_byte; 1608 psmouse->pktsize = 6; 1609 } else { 1610 /* Relative mode follows standard PS/2 mouse protocol */ 1611 psmouse->protocol_handler = psmouse_process_byte; 1612 psmouse->pktsize = 3; 1613 } 1614 1615 psmouse->set_rate = synaptics_set_rate; 1616 psmouse->disconnect = synaptics_disconnect; 1617 psmouse->reconnect = synaptics_reconnect; 1618 psmouse->cleanup = synaptics_reset; 1619 /* Synaptics can usually stay in sync without extra help */ 1620 psmouse->resync_time = 0; 1621 1622 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1623 synaptics_pt_create(psmouse); 1624 1625 /* 1626 * Toshiba's KBC seems to have trouble handling data from 1627 * Synaptics at full rate. Switch to a lower rate (roughly 1628 * the same rate as a standard PS/2 mouse). 1629 */ 1630 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1631 psmouse_info(psmouse, 1632 "Toshiba %s detected, limiting rate to 40pps.\n", 1633 dmi_get_system_info(DMI_PRODUCT_NAME)); 1634 psmouse->rate = 40; 1635 } 1636 1637 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1638 err = device_create_file(&psmouse->ps2dev.serio->dev, 1639 &psmouse_attr_disable_gesture.dattr); 1640 if (err) { 1641 psmouse_err(psmouse, 1642 "Failed to create disable_gesture attribute (%d)", 1643 err); 1644 goto init_fail; 1645 } 1646 } 1647 1648 return 0; 1649 1650 init_fail: 1651 kfree(priv); 1652 return err; 1653 } 1654 1655 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1656 { 1657 struct synaptics_device_info info; 1658 int error; 1659 1660 psmouse_reset(psmouse); 1661 1662 error = synaptics_query_hardware(psmouse, &info); 1663 if (error) { 1664 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1665 return error; 1666 } 1667 1668 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1669 } 1670 1671 int synaptics_init_absolute(struct psmouse *psmouse) 1672 { 1673 return __synaptics_init(psmouse, true); 1674 } 1675 1676 int synaptics_init_relative(struct psmouse *psmouse) 1677 { 1678 return __synaptics_init(psmouse, false); 1679 } 1680 1681 static int synaptics_setup_ps2(struct psmouse *psmouse, 1682 struct synaptics_device_info *info) 1683 { 1684 bool absolute_mode = true; 1685 int error; 1686 1687 /* 1688 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1689 * packet spew overloads the EC such that key presses on the keyboard 1690 * are missed. Given that, don't even attempt to use Absolute mode. 1691 * Relative mode seems to work just fine. 1692 */ 1693 if (broken_olpc_ec) { 1694 psmouse_info(psmouse, 1695 "OLPC XO detected, forcing relative protocol.\n"); 1696 absolute_mode = false; 1697 } 1698 1699 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1700 if (error) 1701 return error; 1702 1703 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1704 } 1705 1706 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1707 1708 void __init synaptics_module_init(void) 1709 { 1710 } 1711 1712 static int __maybe_unused 1713 synaptics_setup_ps2(struct psmouse *psmouse, 1714 struct synaptics_device_info *info) 1715 { 1716 return -ENOSYS; 1717 } 1718 1719 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1720 1721 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1722 1723 /* 1724 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1725 * provides a better bandwidth and allow a better control of the touchpads. 1726 * This is used to decide if we need to use this bus or not. 1727 */ 1728 enum { 1729 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1730 SYNAPTICS_INTERTOUCH_OFF, 1731 SYNAPTICS_INTERTOUCH_ON, 1732 }; 1733 1734 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1735 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1736 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1737 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1738 1739 static int synaptics_create_intertouch(struct psmouse *psmouse, 1740 struct synaptics_device_info *info, 1741 bool leave_breadcrumbs) 1742 { 1743 bool topbuttonpad = 1744 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1745 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1746 const struct rmi_device_platform_data pdata = { 1747 .sensor_pdata = { 1748 .sensor_type = rmi_sensor_touchpad, 1749 .axis_align.flip_y = true, 1750 .kernel_tracking = false, 1751 .topbuttonpad = topbuttonpad, 1752 }, 1753 .f30_data = { 1754 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1755 .trackstick_buttons = 1756 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1757 }, 1758 }; 1759 const struct i2c_board_info intertouch_board = { 1760 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1761 .flags = I2C_CLIENT_HOST_NOTIFY, 1762 }; 1763 1764 return psmouse_smbus_init(psmouse, &intertouch_board, 1765 &pdata, sizeof(pdata), true, 1766 leave_breadcrumbs); 1767 } 1768 1769 /** 1770 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1771 * and decides to instantiate a SMBus InterTouch device. 1772 */ 1773 static int synaptics_setup_intertouch(struct psmouse *psmouse, 1774 struct synaptics_device_info *info, 1775 bool leave_breadcrumbs) 1776 { 1777 int error; 1778 1779 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1780 return -ENXIO; 1781 1782 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1783 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1784 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1785 1786 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1787 psmouse_info(psmouse, 1788 "Your touchpad (%s) says it can support a different bus. " 1789 "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", 1790 psmouse->ps2dev.serio->firmware_id); 1791 1792 return -ENXIO; 1793 } 1794 } 1795 1796 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1797 1798 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1799 if (error) { 1800 if (error == -EAGAIN) 1801 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1802 else 1803 psmouse_err(psmouse, "unable to create intertouch device\n"); 1804 1805 return error; 1806 } 1807 1808 return 0; 1809 } 1810 1811 int synaptics_init_smbus(struct psmouse *psmouse) 1812 { 1813 struct synaptics_device_info info; 1814 int error; 1815 1816 psmouse_reset(psmouse); 1817 1818 error = synaptics_query_hardware(psmouse, &info); 1819 if (error) { 1820 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1821 return error; 1822 } 1823 1824 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1825 return -ENXIO; 1826 1827 return synaptics_create_intertouch(psmouse, &info, false); 1828 } 1829 1830 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1831 1832 static int __maybe_unused 1833 synaptics_setup_intertouch(struct psmouse *psmouse, 1834 struct synaptics_device_info *info, 1835 bool leave_breadcrumbs) 1836 { 1837 return -ENOSYS; 1838 } 1839 1840 int synaptics_init_smbus(struct psmouse *psmouse) 1841 { 1842 return -ENOSYS; 1843 } 1844 1845 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1846 1847 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1848 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1849 1850 int synaptics_init(struct psmouse *psmouse) 1851 { 1852 struct synaptics_device_info info; 1853 int error; 1854 int retval; 1855 1856 psmouse_reset(psmouse); 1857 1858 error = synaptics_query_hardware(psmouse, &info); 1859 if (error) { 1860 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1861 return error; 1862 } 1863 1864 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1865 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1866 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1867 /* Forcepads need F21, which is not ready */ 1868 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1869 psmouse_warn(psmouse, 1870 "The touchpad can support a better bus than the too old PS/2 protocol. " 1871 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1872 } 1873 1874 error = synaptics_setup_intertouch(psmouse, &info, true); 1875 if (!error) 1876 return PSMOUSE_SYNAPTICS_SMBUS; 1877 } 1878 1879 retval = synaptics_setup_ps2(psmouse, &info); 1880 if (retval < 0) { 1881 /* 1882 * Not using any flavor of Synaptics support, so clean up 1883 * SMbus breadcrumbs, if any. 1884 */ 1885 psmouse_smbus_cleanup(psmouse); 1886 } 1887 1888 return retval; 1889 } 1890 1891 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1892 1893 int synaptics_init(struct psmouse *psmouse) 1894 { 1895 return -ENOSYS; 1896 } 1897 1898 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1899