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