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 "LEN007a", /* T470s */ 174 "LEN0071", /* T480 */ 175 "LEN0072", /* X1 Carbon Gen 5 (2017) - Elan/ALPS trackpoint */ 176 "LEN0073", /* X1 Carbon G5 (Elantech) */ 177 "LEN0091", /* X1 Carbon 6 */ 178 "LEN0092", /* X1 Carbon 6 */ 179 "LEN0093", /* T480 */ 180 "LEN0096", /* X280 */ 181 "LEN0097", /* X280 -> ALPS trackpoint */ 182 "LEN009b", /* T580 */ 183 "LEN200f", /* T450s */ 184 "LEN2044", /* L470 */ 185 "LEN2054", /* E480 */ 186 "LEN2055", /* E580 */ 187 "SYN3052", /* HP EliteBook 840 G4 */ 188 "SYN3221", /* HP 15-ay000 */ 189 "SYN323d", /* HP Spectre X360 13-w013dx */ 190 "SYN3257", /* HP Envy 13-ad105ng */ 191 NULL 192 }; 193 194 static const char * const forcepad_pnp_ids[] = { 195 "SYN300D", 196 "SYN3014", 197 NULL 198 }; 199 200 /* 201 * Send a command to the synaptics touchpad by special commands 202 */ 203 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 204 { 205 int error; 206 207 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 208 if (error) 209 return error; 210 211 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 212 if (error) 213 return error; 214 215 return 0; 216 } 217 218 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 219 { 220 int error; 221 union { 222 __be32 be_val; 223 char buf[4]; 224 } resp = { 0 }; 225 226 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 227 if (error) 228 return error; 229 230 *val = be32_to_cpu(resp.be_val); 231 return 0; 232 } 233 234 /* 235 * Identify Touchpad 236 * See also the SYN_ID_* macros 237 */ 238 static int synaptics_identify(struct psmouse *psmouse, 239 struct synaptics_device_info *info) 240 { 241 int error; 242 243 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 244 if (error) 245 return error; 246 247 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 248 } 249 250 /* 251 * Read the model-id bytes from the touchpad 252 * see also SYN_MODEL_* macros 253 */ 254 static int synaptics_model_id(struct psmouse *psmouse, 255 struct synaptics_device_info *info) 256 { 257 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 258 } 259 260 /* 261 * Read the firmware id from the touchpad 262 */ 263 static int synaptics_firmware_id(struct psmouse *psmouse, 264 struct synaptics_device_info *info) 265 { 266 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 267 &info->firmware_id); 268 } 269 270 /* 271 * Read the board id and the "More Extended Queries" from the touchpad 272 * The board id is encoded in the "QUERY MODES" response 273 */ 274 static int synaptics_query_modes(struct psmouse *psmouse, 275 struct synaptics_device_info *info) 276 { 277 u8 bid[3]; 278 int error; 279 280 /* firmwares prior 7.5 have no board_id encoded */ 281 if (SYN_ID_FULL(info->identity) < 0x705) 282 return 0; 283 284 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 285 if (error) 286 return error; 287 288 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 289 290 if (SYN_MEXT_CAP_BIT(bid[0])) 291 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 292 &info->ext_cap_10); 293 294 return 0; 295 } 296 297 /* 298 * Read the capability-bits from the touchpad 299 * see also the SYN_CAP_* macros 300 */ 301 static int synaptics_capability(struct psmouse *psmouse, 302 struct synaptics_device_info *info) 303 { 304 int error; 305 306 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 307 &info->capabilities); 308 if (error) 309 return error; 310 311 info->ext_cap = info->ext_cap_0c = 0; 312 313 /* 314 * Older firmwares had submodel ID fixed to 0x47 315 */ 316 if (SYN_ID_FULL(info->identity) < 0x705 && 317 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 318 return -ENXIO; 319 } 320 321 /* 322 * Unless capExtended is set the rest of the flags should be ignored 323 */ 324 if (!SYN_CAP_EXTENDED(info->capabilities)) 325 info->capabilities = 0; 326 327 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 328 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 329 &info->ext_cap); 330 if (error) { 331 psmouse_warn(psmouse, 332 "device claims to have extended capabilities, but I'm not able to read them.\n"); 333 } else { 334 /* 335 * if nExtBtn is greater than 8 it should be considered 336 * invalid and treated as 0 337 */ 338 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 339 info->ext_cap &= ~SYN_CAP_MB_MASK; 340 } 341 } 342 343 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 344 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 345 &info->ext_cap_0c); 346 if (error) 347 psmouse_warn(psmouse, 348 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 349 } 350 351 return 0; 352 } 353 354 /* 355 * Read touchpad resolution and maximum reported coordinates 356 * Resolution is left zero if touchpad does not support the query 357 */ 358 static int synaptics_resolution(struct psmouse *psmouse, 359 struct synaptics_device_info *info) 360 { 361 u8 resp[3]; 362 int error; 363 364 if (SYN_ID_MAJOR(info->identity) < 4) 365 return 0; 366 367 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 368 if (!error) { 369 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 370 info->x_res = resp[0]; /* x resolution in units/mm */ 371 info->y_res = resp[2]; /* y resolution in units/mm */ 372 } 373 } 374 375 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 376 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 377 error = synaptics_send_cmd(psmouse, 378 SYN_QUE_EXT_MAX_COORDS, resp); 379 if (error) { 380 psmouse_warn(psmouse, 381 "device claims to have max coordinates query, but I'm not able to read it.\n"); 382 } else { 383 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 384 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 385 psmouse_info(psmouse, 386 "queried max coordinates: x [..%d], y [..%d]\n", 387 info->x_max, info->y_max); 388 } 389 } 390 391 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 392 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 393 /* 394 * Firmware v8.1 does not report proper number of extended 395 * capabilities, but has been proven to report correct min 396 * coordinates. 397 */ 398 SYN_ID_FULL(info->identity) == 0x801)) { 399 error = synaptics_send_cmd(psmouse, 400 SYN_QUE_EXT_MIN_COORDS, resp); 401 if (error) { 402 psmouse_warn(psmouse, 403 "device claims to have min coordinates query, but I'm not able to read it.\n"); 404 } else { 405 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 406 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 407 psmouse_info(psmouse, 408 "queried min coordinates: x [%d..], y [%d..]\n", 409 info->x_min, info->y_min); 410 } 411 } 412 413 return 0; 414 } 415 416 static int synaptics_query_hardware(struct psmouse *psmouse, 417 struct synaptics_device_info *info) 418 { 419 int error; 420 421 memset(info, 0, sizeof(*info)); 422 423 error = synaptics_identify(psmouse, info); 424 if (error) 425 return error; 426 427 error = synaptics_model_id(psmouse, info); 428 if (error) 429 return error; 430 431 error = synaptics_firmware_id(psmouse, info); 432 if (error) 433 return error; 434 435 error = synaptics_query_modes(psmouse, info); 436 if (error) 437 return error; 438 439 error = synaptics_capability(psmouse, info); 440 if (error) 441 return error; 442 443 error = synaptics_resolution(psmouse, info); 444 if (error) 445 return error; 446 447 return 0; 448 } 449 450 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 451 452 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 453 454 static bool cr48_profile_sensor; 455 456 #define ANY_BOARD_ID 0 457 struct min_max_quirk { 458 const char * const *pnp_ids; 459 struct { 460 u32 min, max; 461 } board_id; 462 u32 x_min, x_max, y_min, y_max; 463 }; 464 465 static const struct min_max_quirk min_max_pnpid_table[] = { 466 { 467 (const char * const []){"LEN0033", NULL}, 468 {ANY_BOARD_ID, ANY_BOARD_ID}, 469 1024, 5052, 2258, 4832 470 }, 471 { 472 (const char * const []){"LEN0042", NULL}, 473 {ANY_BOARD_ID, ANY_BOARD_ID}, 474 1232, 5710, 1156, 4696 475 }, 476 { 477 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 478 "LEN0039", "LEN2002", "LEN2004", 479 NULL}, 480 {ANY_BOARD_ID, 2961}, 481 1024, 5112, 2024, 4832 482 }, 483 { 484 (const char * const []){"LEN2000", NULL}, 485 {ANY_BOARD_ID, ANY_BOARD_ID}, 486 1024, 5113, 2021, 4832 487 }, 488 { 489 (const char * const []){"LEN2001", NULL}, 490 {ANY_BOARD_ID, ANY_BOARD_ID}, 491 1024, 5022, 2508, 4832 492 }, 493 { 494 (const char * const []){"LEN2006", NULL}, 495 {2691, 2691}, 496 1024, 5045, 2457, 4832 497 }, 498 { 499 (const char * const []){"LEN2006", NULL}, 500 {ANY_BOARD_ID, ANY_BOARD_ID}, 501 1264, 5675, 1171, 4688 502 }, 503 { } 504 }; 505 506 /***************************************************************************** 507 * Synaptics communications functions 508 ****************************************************************************/ 509 510 /* 511 * Synaptics touchpads report the y coordinate from bottom to top, which is 512 * opposite from what userspace expects. 513 * This function is used to invert y before reporting. 514 */ 515 static int synaptics_invert_y(int y) 516 { 517 return YMAX_NOMINAL + YMIN_NOMINAL - y; 518 } 519 520 /* 521 * Apply quirk(s) if the hardware matches 522 */ 523 static void synaptics_apply_quirks(struct psmouse *psmouse, 524 struct synaptics_device_info *info) 525 { 526 int i; 527 528 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 529 if (!psmouse_matches_pnp_id(psmouse, 530 min_max_pnpid_table[i].pnp_ids)) 531 continue; 532 533 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 534 info->board_id < min_max_pnpid_table[i].board_id.min) 535 continue; 536 537 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 538 info->board_id > min_max_pnpid_table[i].board_id.max) 539 continue; 540 541 info->x_min = min_max_pnpid_table[i].x_min; 542 info->x_max = min_max_pnpid_table[i].x_max; 543 info->y_min = min_max_pnpid_table[i].y_min; 544 info->y_max = min_max_pnpid_table[i].y_max; 545 psmouse_info(psmouse, 546 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 547 info->x_min, info->x_max, 548 info->y_min, info->y_max); 549 break; 550 } 551 } 552 553 static bool synaptics_has_agm(struct synaptics_data *priv) 554 { 555 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 556 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 557 } 558 559 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 560 { 561 static u8 param = 0xc8; 562 int error; 563 564 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 565 if (error) 566 return error; 567 568 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 569 if (error) 570 return error; 571 572 return 0; 573 } 574 575 static int synaptics_set_mode(struct psmouse *psmouse) 576 { 577 struct synaptics_data *priv = psmouse->private; 578 int error; 579 580 priv->mode = 0; 581 if (priv->absolute_mode) 582 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 583 if (priv->disable_gesture) 584 priv->mode |= SYN_BIT_DISABLE_GESTURE; 585 if (psmouse->rate >= 80) 586 priv->mode |= SYN_BIT_HIGH_RATE; 587 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 588 priv->mode |= SYN_BIT_W_MODE; 589 590 error = synaptics_mode_cmd(psmouse, priv->mode); 591 if (error) 592 return error; 593 594 if (priv->absolute_mode && synaptics_has_agm(priv)) { 595 error = synaptics_set_advanced_gesture_mode(psmouse); 596 if (error) { 597 psmouse_err(psmouse, 598 "Advanced gesture mode init failed: %d\n", 599 error); 600 return error; 601 } 602 } 603 604 return 0; 605 } 606 607 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 608 { 609 struct synaptics_data *priv = psmouse->private; 610 611 if (rate >= 80) { 612 priv->mode |= SYN_BIT_HIGH_RATE; 613 psmouse->rate = 80; 614 } else { 615 priv->mode &= ~SYN_BIT_HIGH_RATE; 616 psmouse->rate = 40; 617 } 618 619 synaptics_mode_cmd(psmouse, priv->mode); 620 } 621 622 /***************************************************************************** 623 * Synaptics pass-through PS/2 port support 624 ****************************************************************************/ 625 static int synaptics_pt_write(struct serio *serio, u8 c) 626 { 627 struct psmouse *parent = serio_get_drvdata(serio->parent); 628 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 629 int error; 630 631 error = ps2_sliced_command(&parent->ps2dev, c); 632 if (error) 633 return error; 634 635 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 636 if (error) 637 return error; 638 639 return 0; 640 } 641 642 static int synaptics_pt_start(struct serio *serio) 643 { 644 struct psmouse *parent = serio_get_drvdata(serio->parent); 645 struct synaptics_data *priv = parent->private; 646 647 serio_pause_rx(parent->ps2dev.serio); 648 priv->pt_port = serio; 649 serio_continue_rx(parent->ps2dev.serio); 650 651 return 0; 652 } 653 654 static void synaptics_pt_stop(struct serio *serio) 655 { 656 struct psmouse *parent = serio_get_drvdata(serio->parent); 657 struct synaptics_data *priv = parent->private; 658 659 serio_pause_rx(parent->ps2dev.serio); 660 priv->pt_port = NULL; 661 serio_continue_rx(parent->ps2dev.serio); 662 } 663 664 static int synaptics_is_pt_packet(u8 *buf) 665 { 666 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 667 } 668 669 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet) 670 { 671 struct psmouse *child = serio_get_drvdata(ptport); 672 673 if (child && child->state == PSMOUSE_ACTIVATED) { 674 serio_interrupt(ptport, packet[1], 0); 675 serio_interrupt(ptport, packet[4], 0); 676 serio_interrupt(ptport, packet[5], 0); 677 if (child->pktsize == 4) 678 serio_interrupt(ptport, packet[2], 0); 679 } else { 680 serio_interrupt(ptport, packet[1], 0); 681 } 682 } 683 684 static void synaptics_pt_activate(struct psmouse *psmouse) 685 { 686 struct synaptics_data *priv = psmouse->private; 687 struct psmouse *child = serio_get_drvdata(priv->pt_port); 688 689 /* adjust the touchpad to child's choice of protocol */ 690 if (child) { 691 if (child->pktsize == 4) 692 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 693 else 694 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 695 696 if (synaptics_mode_cmd(psmouse, priv->mode)) 697 psmouse_warn(psmouse, 698 "failed to switch guest protocol\n"); 699 } 700 } 701 702 static void synaptics_pt_create(struct psmouse *psmouse) 703 { 704 struct serio *serio; 705 706 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 707 if (!serio) { 708 psmouse_err(psmouse, 709 "not enough memory for pass-through port\n"); 710 return; 711 } 712 713 serio->id.type = SERIO_PS_PSTHRU; 714 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 715 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 716 serio->write = synaptics_pt_write; 717 serio->start = synaptics_pt_start; 718 serio->stop = synaptics_pt_stop; 719 serio->parent = psmouse->ps2dev.serio; 720 721 psmouse->pt_activate = synaptics_pt_activate; 722 723 psmouse_info(psmouse, "serio: %s port at %s\n", 724 serio->name, psmouse->phys); 725 serio_register_port(serio); 726 } 727 728 /***************************************************************************** 729 * Functions to interpret the absolute mode packets 730 ****************************************************************************/ 731 732 static void synaptics_parse_agm(const u8 buf[], 733 struct synaptics_data *priv, 734 struct synaptics_hw_state *hw) 735 { 736 struct synaptics_hw_state *agm = &priv->agm; 737 int agm_packet_type; 738 739 agm_packet_type = (buf[5] & 0x30) >> 4; 740 switch (agm_packet_type) { 741 case 1: 742 /* Gesture packet: (x, y, z) half resolution */ 743 agm->w = hw->w; 744 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 745 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 746 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 747 break; 748 749 case 2: 750 /* AGM-CONTACT packet: we are only interested in the count */ 751 priv->agm_count = buf[1]; 752 break; 753 754 default: 755 break; 756 } 757 } 758 759 static void synaptics_parse_ext_buttons(const u8 buf[], 760 struct synaptics_data *priv, 761 struct synaptics_hw_state *hw) 762 { 763 unsigned int ext_bits = 764 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 765 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 766 767 hw->ext_buttons = buf[4] & ext_mask; 768 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 769 } 770 771 static int synaptics_parse_hw_state(const u8 buf[], 772 struct synaptics_data *priv, 773 struct synaptics_hw_state *hw) 774 { 775 memset(hw, 0, sizeof(struct synaptics_hw_state)); 776 777 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 778 hw->w = (((buf[0] & 0x30) >> 2) | 779 ((buf[0] & 0x04) >> 1) | 780 ((buf[3] & 0x04) >> 2)); 781 782 if (synaptics_has_agm(priv) && hw->w == 2) { 783 synaptics_parse_agm(buf, priv, hw); 784 return 1; 785 } 786 787 hw->x = (((buf[3] & 0x10) << 8) | 788 ((buf[1] & 0x0f) << 8) | 789 buf[4]); 790 hw->y = (((buf[3] & 0x20) << 7) | 791 ((buf[1] & 0xf0) << 4) | 792 buf[5]); 793 hw->z = buf[2]; 794 795 hw->left = (buf[0] & 0x01) ? 1 : 0; 796 hw->right = (buf[0] & 0x02) ? 1 : 0; 797 798 if (priv->is_forcepad) { 799 /* 800 * ForcePads, like Clickpads, use middle button 801 * bits to report primary button clicks. 802 * Unfortunately they report primary button not 803 * only when user presses on the pad above certain 804 * threshold, but also when there are more than one 805 * finger on the touchpad, which interferes with 806 * out multi-finger gestures. 807 */ 808 if (hw->z == 0) { 809 /* No contacts */ 810 priv->press = priv->report_press = false; 811 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 812 /* 813 * Single-finger touch with pressure above 814 * the threshold. If pressure stays long 815 * enough, we'll start reporting primary 816 * button. We rely on the device continuing 817 * sending data even if finger does not 818 * move. 819 */ 820 if (!priv->press) { 821 priv->press_start = jiffies; 822 priv->press = true; 823 } else if (time_after(jiffies, 824 priv->press_start + 825 msecs_to_jiffies(50))) { 826 priv->report_press = true; 827 } 828 } else { 829 priv->press = false; 830 } 831 832 hw->left = priv->report_press; 833 834 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 835 /* 836 * Clickpad's button is transmitted as middle button, 837 * however, since it is primary button, we will report 838 * it as BTN_LEFT. 839 */ 840 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 841 842 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 843 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 844 if (hw->w == 2) 845 hw->scroll = (s8)buf[1]; 846 } 847 848 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 849 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 850 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 851 } 852 853 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 854 ((buf[0] ^ buf[3]) & 0x02)) { 855 synaptics_parse_ext_buttons(buf, priv, hw); 856 } 857 } else { 858 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 859 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 860 861 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 862 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 863 864 hw->left = (buf[0] & 0x01) ? 1 : 0; 865 hw->right = (buf[0] & 0x02) ? 1 : 0; 866 } 867 868 /* 869 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 870 * is used by some firmware to indicate a finger at the edge of 871 * the touchpad whose precise position cannot be determined, so 872 * convert these values to the maximum axis value. 873 */ 874 if (hw->x > X_MAX_POSITIVE) 875 hw->x -= 1 << ABS_POS_BITS; 876 else if (hw->x == X_MAX_POSITIVE) 877 hw->x = XMAX; 878 879 if (hw->y > Y_MAX_POSITIVE) 880 hw->y -= 1 << ABS_POS_BITS; 881 else if (hw->y == Y_MAX_POSITIVE) 882 hw->y = YMAX; 883 884 return 0; 885 } 886 887 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 888 bool active, int x, int y) 889 { 890 input_mt_slot(dev, slot); 891 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 892 if (active) { 893 input_report_abs(dev, ABS_MT_POSITION_X, x); 894 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 895 } 896 } 897 898 static void synaptics_report_semi_mt_data(struct input_dev *dev, 899 const struct synaptics_hw_state *a, 900 const struct synaptics_hw_state *b, 901 int num_fingers) 902 { 903 if (num_fingers >= 2) { 904 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 905 min(a->y, b->y)); 906 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 907 max(a->y, b->y)); 908 } else if (num_fingers == 1) { 909 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 910 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 911 } else { 912 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 913 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 914 } 915 } 916 917 static void synaptics_report_ext_buttons(struct psmouse *psmouse, 918 const struct synaptics_hw_state *hw) 919 { 920 struct input_dev *dev = psmouse->dev; 921 struct synaptics_data *priv = psmouse->private; 922 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 923 int i; 924 925 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 926 return; 927 928 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 929 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 930 SYN_ID_FULL(priv->info.identity) == 0x802) && 931 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 932 return; 933 934 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 935 for (i = 0; i < ext_bits; i++) { 936 input_report_key(dev, BTN_0 + 2 * i, 937 hw->ext_buttons & BIT(i)); 938 input_report_key(dev, BTN_1 + 2 * i, 939 hw->ext_buttons & BIT(i + ext_bits)); 940 } 941 return; 942 } 943 944 /* 945 * This generation of touchpads has the trackstick buttons 946 * physically wired to the touchpad. Re-route them through 947 * the pass-through interface. 948 */ 949 if (priv->pt_port) { 950 u8 pt_buttons; 951 952 /* The trackstick expects at most 3 buttons */ 953 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 954 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 955 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 956 957 serio_interrupt(priv->pt_port, 958 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 959 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 960 } 961 } 962 963 static void synaptics_report_buttons(struct psmouse *psmouse, 964 const struct synaptics_hw_state *hw) 965 { 966 struct input_dev *dev = psmouse->dev; 967 struct synaptics_data *priv = psmouse->private; 968 969 input_report_key(dev, BTN_LEFT, hw->left); 970 input_report_key(dev, BTN_RIGHT, hw->right); 971 972 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 973 input_report_key(dev, BTN_MIDDLE, hw->middle); 974 975 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 976 input_report_key(dev, BTN_FORWARD, hw->up); 977 input_report_key(dev, BTN_BACK, hw->down); 978 } 979 980 synaptics_report_ext_buttons(psmouse, hw); 981 } 982 983 static void synaptics_report_mt_data(struct psmouse *psmouse, 984 const struct synaptics_hw_state *sgm, 985 int num_fingers) 986 { 987 struct input_dev *dev = psmouse->dev; 988 struct synaptics_data *priv = psmouse->private; 989 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 990 struct input_mt_pos pos[2]; 991 int slot[2], nsemi, i; 992 993 nsemi = clamp_val(num_fingers, 0, 2); 994 995 for (i = 0; i < nsemi; i++) { 996 pos[i].x = hw[i]->x; 997 pos[i].y = synaptics_invert_y(hw[i]->y); 998 } 999 1000 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 1001 1002 for (i = 0; i < nsemi; i++) { 1003 input_mt_slot(dev, slot[i]); 1004 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1005 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1006 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1007 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1008 } 1009 1010 input_mt_drop_unused(dev); 1011 1012 /* Don't use active slot count to generate BTN_TOOL events. */ 1013 input_mt_report_pointer_emulation(dev, false); 1014 1015 /* Send the number of fingers reported by touchpad itself. */ 1016 input_mt_report_finger_count(dev, num_fingers); 1017 1018 synaptics_report_buttons(psmouse, sgm); 1019 1020 input_sync(dev); 1021 } 1022 1023 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1024 struct synaptics_hw_state *sgm) 1025 { 1026 struct synaptics_data *priv = psmouse->private; 1027 int num_fingers; 1028 1029 /* 1030 * Update mt_state using the new finger count and current mt_state. 1031 */ 1032 if (sgm->z == 0) 1033 num_fingers = 0; 1034 else if (sgm->w >= 4) 1035 num_fingers = 1; 1036 else if (sgm->w == 0) 1037 num_fingers = 2; 1038 else if (sgm->w == 1) 1039 num_fingers = priv->agm_count ? priv->agm_count : 3; 1040 else 1041 num_fingers = 4; 1042 1043 /* Send resulting input events to user space */ 1044 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1045 } 1046 1047 static bool synaptics_has_multifinger(struct synaptics_data *priv) 1048 { 1049 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1050 return true; 1051 1052 /* Advanced gesture mode also sends multi finger data */ 1053 return synaptics_has_agm(priv); 1054 } 1055 1056 /* 1057 * called for each full received packet from the touchpad 1058 */ 1059 static void synaptics_process_packet(struct psmouse *psmouse) 1060 { 1061 struct input_dev *dev = psmouse->dev; 1062 struct synaptics_data *priv = psmouse->private; 1063 struct synaptics_device_info *info = &priv->info; 1064 struct synaptics_hw_state hw; 1065 int num_fingers; 1066 int finger_width; 1067 1068 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1069 return; 1070 1071 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1072 synaptics_image_sensor_process(psmouse, &hw); 1073 return; 1074 } 1075 1076 if (hw.scroll) { 1077 priv->scroll += hw.scroll; 1078 1079 while (priv->scroll >= 4) { 1080 input_report_key(dev, BTN_BACK, !hw.down); 1081 input_sync(dev); 1082 input_report_key(dev, BTN_BACK, hw.down); 1083 input_sync(dev); 1084 priv->scroll -= 4; 1085 } 1086 while (priv->scroll <= -4) { 1087 input_report_key(dev, BTN_FORWARD, !hw.up); 1088 input_sync(dev); 1089 input_report_key(dev, BTN_FORWARD, hw.up); 1090 input_sync(dev); 1091 priv->scroll += 4; 1092 } 1093 return; 1094 } 1095 1096 if (hw.z > 0 && hw.x > 1) { 1097 num_fingers = 1; 1098 finger_width = 5; 1099 if (SYN_CAP_EXTENDED(info->capabilities)) { 1100 switch (hw.w) { 1101 case 0 ... 1: 1102 if (synaptics_has_multifinger(priv)) 1103 num_fingers = hw.w + 2; 1104 break; 1105 case 2: 1106 if (SYN_MODEL_PEN(info->model_id)) 1107 ; /* Nothing, treat a pen as a single finger */ 1108 break; 1109 case 4 ... 15: 1110 if (SYN_CAP_PALMDETECT(info->capabilities)) 1111 finger_width = hw.w; 1112 break; 1113 } 1114 } 1115 } else { 1116 num_fingers = 0; 1117 finger_width = 0; 1118 } 1119 1120 if (cr48_profile_sensor) { 1121 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1122 return; 1123 } 1124 1125 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1126 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1127 num_fingers); 1128 1129 /* Post events 1130 * BTN_TOUCH has to be first as mousedev relies on it when doing 1131 * absolute -> relative conversion 1132 */ 1133 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1134 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1135 1136 if (num_fingers > 0) { 1137 input_report_abs(dev, ABS_X, hw.x); 1138 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1139 } 1140 input_report_abs(dev, ABS_PRESSURE, hw.z); 1141 1142 if (SYN_CAP_PALMDETECT(info->capabilities)) 1143 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1144 1145 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1146 if (synaptics_has_multifinger(priv)) { 1147 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1148 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1149 } 1150 1151 synaptics_report_buttons(psmouse, &hw); 1152 1153 input_sync(dev); 1154 } 1155 1156 static bool synaptics_validate_byte(struct psmouse *psmouse, 1157 int idx, enum synaptics_pkt_type pkt_type) 1158 { 1159 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1160 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1161 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1162 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1163 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1164 const u8 *packet = psmouse->packet; 1165 1166 if (idx < 0 || idx > 4) 1167 return false; 1168 1169 switch (pkt_type) { 1170 1171 case SYN_NEWABS: 1172 case SYN_NEWABS_RELAXED: 1173 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1174 1175 case SYN_NEWABS_STRICT: 1176 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1177 1178 case SYN_OLDABS: 1179 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1180 1181 default: 1182 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1183 return false; 1184 } 1185 } 1186 1187 static enum synaptics_pkt_type 1188 synaptics_detect_pkt_type(struct psmouse *psmouse) 1189 { 1190 int i; 1191 1192 for (i = 0; i < 5; i++) { 1193 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1194 psmouse_info(psmouse, "using relaxed packet validation\n"); 1195 return SYN_NEWABS_RELAXED; 1196 } 1197 } 1198 1199 return SYN_NEWABS_STRICT; 1200 } 1201 1202 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1203 { 1204 struct synaptics_data *priv = psmouse->private; 1205 1206 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1207 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1208 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1209 1210 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1211 synaptics_is_pt_packet(psmouse->packet)) { 1212 if (priv->pt_port) 1213 synaptics_pass_pt_packet(priv->pt_port, 1214 psmouse->packet); 1215 } else 1216 synaptics_process_packet(psmouse); 1217 1218 return PSMOUSE_FULL_PACKET; 1219 } 1220 1221 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1222 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1223 } 1224 1225 /***************************************************************************** 1226 * Driver initialization/cleanup functions 1227 ****************************************************************************/ 1228 static void set_abs_position_params(struct input_dev *dev, 1229 struct synaptics_device_info *info, 1230 int x_code, int y_code) 1231 { 1232 int x_min = info->x_min ?: XMIN_NOMINAL; 1233 int x_max = info->x_max ?: XMAX_NOMINAL; 1234 int y_min = info->y_min ?: YMIN_NOMINAL; 1235 int y_max = info->y_max ?: YMAX_NOMINAL; 1236 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1237 SYN_REDUCED_FILTER_FUZZ : 0; 1238 1239 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1240 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1241 input_abs_set_res(dev, x_code, info->x_res); 1242 input_abs_set_res(dev, y_code, info->y_res); 1243 } 1244 1245 static int set_input_params(struct psmouse *psmouse, 1246 struct synaptics_data *priv) 1247 { 1248 struct input_dev *dev = psmouse->dev; 1249 struct synaptics_device_info *info = &priv->info; 1250 int i; 1251 int error; 1252 1253 /* Reset default psmouse capabilities */ 1254 __clear_bit(EV_REL, dev->evbit); 1255 bitmap_zero(dev->relbit, REL_CNT); 1256 bitmap_zero(dev->keybit, KEY_CNT); 1257 1258 /* Things that apply to both modes */ 1259 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1260 1261 input_set_capability(dev, EV_KEY, BTN_LEFT); 1262 1263 /* Clickpads report only left button */ 1264 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1265 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1266 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1267 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1268 } 1269 1270 if (!priv->absolute_mode) { 1271 /* Relative mode */ 1272 input_set_capability(dev, EV_REL, REL_X); 1273 input_set_capability(dev, EV_REL, REL_Y); 1274 return 0; 1275 } 1276 1277 /* Absolute mode */ 1278 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1279 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1280 1281 if (cr48_profile_sensor) 1282 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1283 1284 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1285 set_abs_position_params(dev, info, 1286 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1287 /* Image sensors can report per-contact pressure */ 1288 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1289 1290 error = input_mt_init_slots(dev, 2, 1291 INPUT_MT_POINTER | INPUT_MT_TRACK); 1292 if (error) 1293 return error; 1294 1295 /* Image sensors can signal 4 and 5 finger clicks */ 1296 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1297 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1298 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1299 set_abs_position_params(dev, info, 1300 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1301 /* 1302 * Profile sensor in CR-48 tracks contacts reasonably well, 1303 * other non-image sensors with AGM use semi-mt. 1304 */ 1305 error = input_mt_init_slots(dev, 2, 1306 INPUT_MT_POINTER | 1307 (cr48_profile_sensor ? 1308 INPUT_MT_TRACK : 1309 INPUT_MT_SEMI_MT)); 1310 if (error) 1311 return error; 1312 1313 /* 1314 * For semi-mt devices we send ABS_X/Y ourselves instead of 1315 * input_mt_report_pointer_emulation. But 1316 * input_mt_init_slots() resets the fuzz to 0, leading to a 1317 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1318 * position. Let's re-initialize ABS_X/Y here. 1319 */ 1320 if (!cr48_profile_sensor) 1321 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1322 } 1323 1324 if (SYN_CAP_PALMDETECT(info->capabilities)) 1325 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1326 1327 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1328 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1329 1330 if (synaptics_has_multifinger(priv)) { 1331 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1332 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1333 } 1334 1335 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1336 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1337 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1338 input_set_capability(dev, EV_KEY, BTN_BACK); 1339 } 1340 1341 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1342 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1343 input_set_capability(dev, EV_KEY, BTN_0 + i); 1344 1345 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1346 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1347 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1348 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1349 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1350 } 1351 1352 return 0; 1353 } 1354 1355 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1356 void *data, char *buf) 1357 { 1358 struct synaptics_data *priv = psmouse->private; 1359 1360 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1361 } 1362 1363 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1364 void *data, const char *buf, 1365 size_t len) 1366 { 1367 struct synaptics_data *priv = psmouse->private; 1368 unsigned int value; 1369 int err; 1370 1371 err = kstrtouint(buf, 10, &value); 1372 if (err) 1373 return err; 1374 1375 if (value > 1) 1376 return -EINVAL; 1377 1378 if (value == priv->disable_gesture) 1379 return len; 1380 1381 priv->disable_gesture = value; 1382 if (value) 1383 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1384 else 1385 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1386 1387 if (synaptics_mode_cmd(psmouse, priv->mode)) 1388 return -EIO; 1389 1390 return len; 1391 } 1392 1393 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1394 synaptics_show_disable_gesture, 1395 synaptics_set_disable_gesture); 1396 1397 static void synaptics_disconnect(struct psmouse *psmouse) 1398 { 1399 struct synaptics_data *priv = psmouse->private; 1400 1401 /* 1402 * We might have left a breadcrumb when trying to 1403 * set up SMbus companion. 1404 */ 1405 psmouse_smbus_cleanup(psmouse); 1406 1407 if (!priv->absolute_mode && 1408 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1409 device_remove_file(&psmouse->ps2dev.serio->dev, 1410 &psmouse_attr_disable_gesture.dattr); 1411 1412 synaptics_reset(psmouse); 1413 kfree(priv); 1414 psmouse->private = NULL; 1415 } 1416 1417 static int synaptics_reconnect(struct psmouse *psmouse) 1418 { 1419 struct synaptics_data *priv = psmouse->private; 1420 struct synaptics_device_info info; 1421 u8 param[2]; 1422 int retry = 0; 1423 int error; 1424 1425 do { 1426 psmouse_reset(psmouse); 1427 if (retry) { 1428 /* 1429 * On some boxes, right after resuming, the touchpad 1430 * needs some time to finish initializing (I assume 1431 * it needs time to calibrate) and start responding 1432 * to Synaptics-specific queries, so let's wait a 1433 * bit. 1434 */ 1435 ssleep(1); 1436 } 1437 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1438 error = synaptics_detect(psmouse, 0); 1439 } while (error && ++retry < 3); 1440 1441 if (error) 1442 return error; 1443 1444 if (retry > 1) 1445 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1446 1447 error = synaptics_query_hardware(psmouse, &info); 1448 if (error) { 1449 psmouse_err(psmouse, "Unable to query device.\n"); 1450 return error; 1451 } 1452 1453 error = synaptics_set_mode(psmouse); 1454 if (error) { 1455 psmouse_err(psmouse, "Unable to initialize device.\n"); 1456 return error; 1457 } 1458 1459 if (info.identity != priv->info.identity || 1460 info.model_id != priv->info.model_id || 1461 info.capabilities != priv->info.capabilities || 1462 info.ext_cap != priv->info.ext_cap) { 1463 psmouse_err(psmouse, 1464 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1465 priv->info.identity, info.identity, 1466 priv->info.model_id, info.model_id, 1467 priv->info.capabilities, info.capabilities, 1468 priv->info.ext_cap, info.ext_cap); 1469 return -ENXIO; 1470 } 1471 1472 return 0; 1473 } 1474 1475 static bool impaired_toshiba_kbc; 1476 1477 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1478 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1479 { 1480 /* Toshiba Satellite */ 1481 .matches = { 1482 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1483 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1484 }, 1485 }, 1486 { 1487 /* Toshiba Dynabook */ 1488 .matches = { 1489 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1490 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1491 }, 1492 }, 1493 { 1494 /* Toshiba Portege M300 */ 1495 .matches = { 1496 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1497 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1498 }, 1499 1500 }, 1501 { 1502 /* Toshiba Portege M300 */ 1503 .matches = { 1504 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1505 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1506 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1507 }, 1508 1509 }, 1510 #endif 1511 { } 1512 }; 1513 1514 static bool broken_olpc_ec; 1515 1516 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1517 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1518 { 1519 /* OLPC XO-1 or XO-1.5 */ 1520 .matches = { 1521 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1522 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1523 }, 1524 }, 1525 #endif 1526 { } 1527 }; 1528 1529 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1530 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1531 { 1532 /* Cr-48 Chromebook (Codename Mario) */ 1533 .matches = { 1534 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1535 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1536 }, 1537 }, 1538 #endif 1539 { } 1540 }; 1541 1542 void __init synaptics_module_init(void) 1543 { 1544 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1545 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1546 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1547 } 1548 1549 static int synaptics_init_ps2(struct psmouse *psmouse, 1550 struct synaptics_device_info *info, 1551 bool absolute_mode) 1552 { 1553 struct synaptics_data *priv; 1554 int err; 1555 1556 synaptics_apply_quirks(psmouse, info); 1557 1558 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1559 if (!priv) 1560 return -ENOMEM; 1561 1562 priv->info = *info; 1563 priv->absolute_mode = absolute_mode; 1564 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1565 priv->disable_gesture = true; 1566 1567 /* 1568 * Unfortunately ForcePad capability is not exported over PS/2, 1569 * so we have to resort to checking PNP IDs. 1570 */ 1571 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1572 1573 err = synaptics_set_mode(psmouse); 1574 if (err) { 1575 psmouse_err(psmouse, "Unable to initialize device.\n"); 1576 goto init_fail; 1577 } 1578 1579 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1580 SYN_NEWABS : SYN_OLDABS; 1581 1582 psmouse_info(psmouse, 1583 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1584 SYN_ID_MODEL(info->identity), 1585 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1586 info->model_id, 1587 info->capabilities, info->ext_cap, info->ext_cap_0c, 1588 info->ext_cap_10, info->board_id, info->firmware_id); 1589 1590 err = set_input_params(psmouse, priv); 1591 if (err) { 1592 psmouse_err(psmouse, 1593 "failed to set up capabilities: %d\n", err); 1594 goto init_fail; 1595 } 1596 1597 /* 1598 * Encode touchpad model so that it can be used to set 1599 * input device->id.version and be visible to userspace. 1600 * Because version is __u16 we have to drop something. 1601 * Hardware info bits seem to be good candidates as they 1602 * are documented to be for Synaptics corp. internal use. 1603 */ 1604 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1605 (info->model_id & 0x000000ff); 1606 1607 if (absolute_mode) { 1608 psmouse->protocol_handler = synaptics_process_byte; 1609 psmouse->pktsize = 6; 1610 } else { 1611 /* Relative mode follows standard PS/2 mouse protocol */ 1612 psmouse->protocol_handler = psmouse_process_byte; 1613 psmouse->pktsize = 3; 1614 } 1615 1616 psmouse->set_rate = synaptics_set_rate; 1617 psmouse->disconnect = synaptics_disconnect; 1618 psmouse->reconnect = synaptics_reconnect; 1619 psmouse->cleanup = synaptics_reset; 1620 /* Synaptics can usually stay in sync without extra help */ 1621 psmouse->resync_time = 0; 1622 1623 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1624 synaptics_pt_create(psmouse); 1625 1626 /* 1627 * Toshiba's KBC seems to have trouble handling data from 1628 * Synaptics at full rate. Switch to a lower rate (roughly 1629 * the same rate as a standard PS/2 mouse). 1630 */ 1631 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1632 psmouse_info(psmouse, 1633 "Toshiba %s detected, limiting rate to 40pps.\n", 1634 dmi_get_system_info(DMI_PRODUCT_NAME)); 1635 psmouse->rate = 40; 1636 } 1637 1638 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1639 err = device_create_file(&psmouse->ps2dev.serio->dev, 1640 &psmouse_attr_disable_gesture.dattr); 1641 if (err) { 1642 psmouse_err(psmouse, 1643 "Failed to create disable_gesture attribute (%d)", 1644 err); 1645 goto init_fail; 1646 } 1647 } 1648 1649 return 0; 1650 1651 init_fail: 1652 kfree(priv); 1653 return err; 1654 } 1655 1656 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1657 { 1658 struct synaptics_device_info info; 1659 int error; 1660 1661 psmouse_reset(psmouse); 1662 1663 error = synaptics_query_hardware(psmouse, &info); 1664 if (error) { 1665 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1666 return error; 1667 } 1668 1669 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1670 } 1671 1672 int synaptics_init_absolute(struct psmouse *psmouse) 1673 { 1674 return __synaptics_init(psmouse, true); 1675 } 1676 1677 int synaptics_init_relative(struct psmouse *psmouse) 1678 { 1679 return __synaptics_init(psmouse, false); 1680 } 1681 1682 static int synaptics_setup_ps2(struct psmouse *psmouse, 1683 struct synaptics_device_info *info) 1684 { 1685 bool absolute_mode = true; 1686 int error; 1687 1688 /* 1689 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1690 * packet spew overloads the EC such that key presses on the keyboard 1691 * are missed. Given that, don't even attempt to use Absolute mode. 1692 * Relative mode seems to work just fine. 1693 */ 1694 if (broken_olpc_ec) { 1695 psmouse_info(psmouse, 1696 "OLPC XO detected, forcing relative protocol.\n"); 1697 absolute_mode = false; 1698 } 1699 1700 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1701 if (error) 1702 return error; 1703 1704 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1705 } 1706 1707 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1708 1709 void __init synaptics_module_init(void) 1710 { 1711 } 1712 1713 static int __maybe_unused 1714 synaptics_setup_ps2(struct psmouse *psmouse, 1715 struct synaptics_device_info *info) 1716 { 1717 return -ENOSYS; 1718 } 1719 1720 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1721 1722 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1723 1724 /* 1725 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1726 * provides a better bandwidth and allow a better control of the touchpads. 1727 * This is used to decide if we need to use this bus or not. 1728 */ 1729 enum { 1730 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1731 SYNAPTICS_INTERTOUCH_OFF, 1732 SYNAPTICS_INTERTOUCH_ON, 1733 }; 1734 1735 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1736 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1737 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1738 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1739 1740 static int synaptics_create_intertouch(struct psmouse *psmouse, 1741 struct synaptics_device_info *info, 1742 bool leave_breadcrumbs) 1743 { 1744 bool topbuttonpad = 1745 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1746 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1747 const struct rmi_device_platform_data pdata = { 1748 .sensor_pdata = { 1749 .sensor_type = rmi_sensor_touchpad, 1750 .axis_align.flip_y = true, 1751 .kernel_tracking = false, 1752 .topbuttonpad = topbuttonpad, 1753 }, 1754 .f30_data = { 1755 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1756 .trackstick_buttons = 1757 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1758 }, 1759 }; 1760 const struct i2c_board_info intertouch_board = { 1761 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1762 .flags = I2C_CLIENT_HOST_NOTIFY, 1763 }; 1764 1765 return psmouse_smbus_init(psmouse, &intertouch_board, 1766 &pdata, sizeof(pdata), true, 1767 leave_breadcrumbs); 1768 } 1769 1770 /** 1771 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1772 * and decides to instantiate a SMBus InterTouch device. 1773 */ 1774 static int synaptics_setup_intertouch(struct psmouse *psmouse, 1775 struct synaptics_device_info *info, 1776 bool leave_breadcrumbs) 1777 { 1778 int error; 1779 1780 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1781 return -ENXIO; 1782 1783 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1784 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1785 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1786 1787 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1788 psmouse_info(psmouse, 1789 "Your touchpad (%s) says it can support a different bus. " 1790 "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", 1791 psmouse->ps2dev.serio->firmware_id); 1792 1793 return -ENXIO; 1794 } 1795 } 1796 1797 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1798 1799 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1800 if (error) { 1801 if (error == -EAGAIN) 1802 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1803 else 1804 psmouse_err(psmouse, "unable to create intertouch device\n"); 1805 1806 return error; 1807 } 1808 1809 return 0; 1810 } 1811 1812 int synaptics_init_smbus(struct psmouse *psmouse) 1813 { 1814 struct synaptics_device_info info; 1815 int error; 1816 1817 psmouse_reset(psmouse); 1818 1819 error = synaptics_query_hardware(psmouse, &info); 1820 if (error) { 1821 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1822 return error; 1823 } 1824 1825 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1826 return -ENXIO; 1827 1828 return synaptics_create_intertouch(psmouse, &info, false); 1829 } 1830 1831 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1832 1833 static int __maybe_unused 1834 synaptics_setup_intertouch(struct psmouse *psmouse, 1835 struct synaptics_device_info *info, 1836 bool leave_breadcrumbs) 1837 { 1838 return -ENOSYS; 1839 } 1840 1841 int synaptics_init_smbus(struct psmouse *psmouse) 1842 { 1843 return -ENOSYS; 1844 } 1845 1846 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1847 1848 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1849 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1850 1851 int synaptics_init(struct psmouse *psmouse) 1852 { 1853 struct synaptics_device_info info; 1854 int error; 1855 int retval; 1856 1857 psmouse_reset(psmouse); 1858 1859 error = synaptics_query_hardware(psmouse, &info); 1860 if (error) { 1861 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1862 return error; 1863 } 1864 1865 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1866 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1867 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1868 /* Forcepads need F21, which is not ready */ 1869 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1870 psmouse_warn(psmouse, 1871 "The touchpad can support a better bus than the too old PS/2 protocol. " 1872 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1873 } 1874 1875 error = synaptics_setup_intertouch(psmouse, &info, true); 1876 if (!error) 1877 return PSMOUSE_SYNAPTICS_SMBUS; 1878 } 1879 1880 retval = synaptics_setup_ps2(psmouse, &info); 1881 if (retval < 0) { 1882 /* 1883 * Not using any flavor of Synaptics support, so clean up 1884 * SMbus breadcrumbs, if any. 1885 */ 1886 psmouse_smbus_cleanup(psmouse); 1887 } 1888 1889 return retval; 1890 } 1891 1892 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1893 1894 int synaptics_init(struct psmouse *psmouse) 1895 { 1896 return -ENOSYS; 1897 } 1898 1899 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1900