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 "LEN0099", /* X1 Extreme 1st */ 183 "LEN009b", /* T580 */ 184 "LEN200f", /* T450s */ 185 "LEN2044", /* L470 */ 186 "LEN2054", /* E480 */ 187 "LEN2055", /* E580 */ 188 "SYN3052", /* HP EliteBook 840 G4 */ 189 "SYN3221", /* HP 15-ay000 */ 190 "SYN323d", /* HP Spectre X360 13-w013dx */ 191 "SYN3257", /* HP Envy 13-ad105ng */ 192 NULL 193 }; 194 195 static const char * const forcepad_pnp_ids[] = { 196 "SYN300D", 197 "SYN3014", 198 NULL 199 }; 200 201 /* 202 * Send a command to the synaptics touchpad by special commands 203 */ 204 static int synaptics_send_cmd(struct psmouse *psmouse, u8 cmd, u8 *param) 205 { 206 int error; 207 208 error = ps2_sliced_command(&psmouse->ps2dev, cmd); 209 if (error) 210 return error; 211 212 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO); 213 if (error) 214 return error; 215 216 return 0; 217 } 218 219 static int synaptics_query_int(struct psmouse *psmouse, u8 query_cmd, u32 *val) 220 { 221 int error; 222 union { 223 __be32 be_val; 224 char buf[4]; 225 } resp = { 0 }; 226 227 error = synaptics_send_cmd(psmouse, query_cmd, resp.buf + 1); 228 if (error) 229 return error; 230 231 *val = be32_to_cpu(resp.be_val); 232 return 0; 233 } 234 235 /* 236 * Identify Touchpad 237 * See also the SYN_ID_* macros 238 */ 239 static int synaptics_identify(struct psmouse *psmouse, 240 struct synaptics_device_info *info) 241 { 242 int error; 243 244 error = synaptics_query_int(psmouse, SYN_QUE_IDENTIFY, &info->identity); 245 if (error) 246 return error; 247 248 return SYN_ID_IS_SYNAPTICS(info->identity) ? 0 : -ENXIO; 249 } 250 251 /* 252 * Read the model-id bytes from the touchpad 253 * see also SYN_MODEL_* macros 254 */ 255 static int synaptics_model_id(struct psmouse *psmouse, 256 struct synaptics_device_info *info) 257 { 258 return synaptics_query_int(psmouse, SYN_QUE_MODEL, &info->model_id); 259 } 260 261 /* 262 * Read the firmware id from the touchpad 263 */ 264 static int synaptics_firmware_id(struct psmouse *psmouse, 265 struct synaptics_device_info *info) 266 { 267 return synaptics_query_int(psmouse, SYN_QUE_FIRMWARE_ID, 268 &info->firmware_id); 269 } 270 271 /* 272 * Read the board id and the "More Extended Queries" from the touchpad 273 * The board id is encoded in the "QUERY MODES" response 274 */ 275 static int synaptics_query_modes(struct psmouse *psmouse, 276 struct synaptics_device_info *info) 277 { 278 u8 bid[3]; 279 int error; 280 281 /* firmwares prior 7.5 have no board_id encoded */ 282 if (SYN_ID_FULL(info->identity) < 0x705) 283 return 0; 284 285 error = synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid); 286 if (error) 287 return error; 288 289 info->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 290 291 if (SYN_MEXT_CAP_BIT(bid[0])) 292 return synaptics_query_int(psmouse, SYN_QUE_MEXT_CAPAB_10, 293 &info->ext_cap_10); 294 295 return 0; 296 } 297 298 /* 299 * Read the capability-bits from the touchpad 300 * see also the SYN_CAP_* macros 301 */ 302 static int synaptics_capability(struct psmouse *psmouse, 303 struct synaptics_device_info *info) 304 { 305 int error; 306 307 error = synaptics_query_int(psmouse, SYN_QUE_CAPABILITIES, 308 &info->capabilities); 309 if (error) 310 return error; 311 312 info->ext_cap = info->ext_cap_0c = 0; 313 314 /* 315 * Older firmwares had submodel ID fixed to 0x47 316 */ 317 if (SYN_ID_FULL(info->identity) < 0x705 && 318 SYN_CAP_SUBMODEL_ID(info->capabilities) != 0x47) { 319 return -ENXIO; 320 } 321 322 /* 323 * Unless capExtended is set the rest of the flags should be ignored 324 */ 325 if (!SYN_CAP_EXTENDED(info->capabilities)) 326 info->capabilities = 0; 327 328 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 1) { 329 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB, 330 &info->ext_cap); 331 if (error) { 332 psmouse_warn(psmouse, 333 "device claims to have extended capabilities, but I'm not able to read them.\n"); 334 } else { 335 /* 336 * if nExtBtn is greater than 8 it should be considered 337 * invalid and treated as 0 338 */ 339 if (SYN_CAP_MULTI_BUTTON_NO(info->ext_cap) > 8) 340 info->ext_cap &= ~SYN_CAP_MB_MASK; 341 } 342 } 343 344 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 4) { 345 error = synaptics_query_int(psmouse, SYN_QUE_EXT_CAPAB_0C, 346 &info->ext_cap_0c); 347 if (error) 348 psmouse_warn(psmouse, 349 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 350 } 351 352 return 0; 353 } 354 355 /* 356 * Read touchpad resolution and maximum reported coordinates 357 * Resolution is left zero if touchpad does not support the query 358 */ 359 static int synaptics_resolution(struct psmouse *psmouse, 360 struct synaptics_device_info *info) 361 { 362 u8 resp[3]; 363 int error; 364 365 if (SYN_ID_MAJOR(info->identity) < 4) 366 return 0; 367 368 error = synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp); 369 if (!error) { 370 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 371 info->x_res = resp[0]; /* x resolution in units/mm */ 372 info->y_res = resp[2]; /* y resolution in units/mm */ 373 } 374 } 375 376 if (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 5 && 377 SYN_CAP_MAX_DIMENSIONS(info->ext_cap_0c)) { 378 error = synaptics_send_cmd(psmouse, 379 SYN_QUE_EXT_MAX_COORDS, resp); 380 if (error) { 381 psmouse_warn(psmouse, 382 "device claims to have max coordinates query, but I'm not able to read it.\n"); 383 } else { 384 info->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 385 info->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 386 psmouse_info(psmouse, 387 "queried max coordinates: x [..%d], y [..%d]\n", 388 info->x_max, info->y_max); 389 } 390 } 391 392 if (SYN_CAP_MIN_DIMENSIONS(info->ext_cap_0c) && 393 (SYN_EXT_CAP_REQUESTS(info->capabilities) >= 7 || 394 /* 395 * Firmware v8.1 does not report proper number of extended 396 * capabilities, but has been proven to report correct min 397 * coordinates. 398 */ 399 SYN_ID_FULL(info->identity) == 0x801)) { 400 error = synaptics_send_cmd(psmouse, 401 SYN_QUE_EXT_MIN_COORDS, resp); 402 if (error) { 403 psmouse_warn(psmouse, 404 "device claims to have min coordinates query, but I'm not able to read it.\n"); 405 } else { 406 info->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 407 info->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 408 psmouse_info(psmouse, 409 "queried min coordinates: x [%d..], y [%d..]\n", 410 info->x_min, info->y_min); 411 } 412 } 413 414 return 0; 415 } 416 417 static int synaptics_query_hardware(struct psmouse *psmouse, 418 struct synaptics_device_info *info) 419 { 420 int error; 421 422 memset(info, 0, sizeof(*info)); 423 424 error = synaptics_identify(psmouse, info); 425 if (error) 426 return error; 427 428 error = synaptics_model_id(psmouse, info); 429 if (error) 430 return error; 431 432 error = synaptics_firmware_id(psmouse, info); 433 if (error) 434 return error; 435 436 error = synaptics_query_modes(psmouse, info); 437 if (error) 438 return error; 439 440 error = synaptics_capability(psmouse, info); 441 if (error) 442 return error; 443 444 error = synaptics_resolution(psmouse, info); 445 if (error) 446 return error; 447 448 return 0; 449 } 450 451 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 452 453 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 454 455 static bool cr48_profile_sensor; 456 457 #define ANY_BOARD_ID 0 458 struct min_max_quirk { 459 const char * const *pnp_ids; 460 struct { 461 u32 min, max; 462 } board_id; 463 u32 x_min, x_max, y_min, y_max; 464 }; 465 466 static const struct min_max_quirk min_max_pnpid_table[] = { 467 { 468 (const char * const []){"LEN0033", NULL}, 469 {ANY_BOARD_ID, ANY_BOARD_ID}, 470 1024, 5052, 2258, 4832 471 }, 472 { 473 (const char * const []){"LEN0042", NULL}, 474 {ANY_BOARD_ID, ANY_BOARD_ID}, 475 1232, 5710, 1156, 4696 476 }, 477 { 478 (const char * const []){"LEN0034", "LEN0036", "LEN0037", 479 "LEN0039", "LEN2002", "LEN2004", 480 NULL}, 481 {ANY_BOARD_ID, 2961}, 482 1024, 5112, 2024, 4832 483 }, 484 { 485 (const char * const []){"LEN2000", NULL}, 486 {ANY_BOARD_ID, ANY_BOARD_ID}, 487 1024, 5113, 2021, 4832 488 }, 489 { 490 (const char * const []){"LEN2001", NULL}, 491 {ANY_BOARD_ID, ANY_BOARD_ID}, 492 1024, 5022, 2508, 4832 493 }, 494 { 495 (const char * const []){"LEN2006", NULL}, 496 {2691, 2691}, 497 1024, 5045, 2457, 4832 498 }, 499 { 500 (const char * const []){"LEN2006", NULL}, 501 {ANY_BOARD_ID, ANY_BOARD_ID}, 502 1264, 5675, 1171, 4688 503 }, 504 { } 505 }; 506 507 /***************************************************************************** 508 * Synaptics communications functions 509 ****************************************************************************/ 510 511 /* 512 * Synaptics touchpads report the y coordinate from bottom to top, which is 513 * opposite from what userspace expects. 514 * This function is used to invert y before reporting. 515 */ 516 static int synaptics_invert_y(int y) 517 { 518 return YMAX_NOMINAL + YMIN_NOMINAL - y; 519 } 520 521 /* 522 * Apply quirk(s) if the hardware matches 523 */ 524 static void synaptics_apply_quirks(struct psmouse *psmouse, 525 struct synaptics_device_info *info) 526 { 527 int i; 528 529 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 530 if (!psmouse_matches_pnp_id(psmouse, 531 min_max_pnpid_table[i].pnp_ids)) 532 continue; 533 534 if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID && 535 info->board_id < min_max_pnpid_table[i].board_id.min) 536 continue; 537 538 if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID && 539 info->board_id > min_max_pnpid_table[i].board_id.max) 540 continue; 541 542 info->x_min = min_max_pnpid_table[i].x_min; 543 info->x_max = min_max_pnpid_table[i].x_max; 544 info->y_min = min_max_pnpid_table[i].y_min; 545 info->y_max = min_max_pnpid_table[i].y_max; 546 psmouse_info(psmouse, 547 "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n", 548 info->x_min, info->x_max, 549 info->y_min, info->y_max); 550 break; 551 } 552 } 553 554 static bool synaptics_has_agm(struct synaptics_data *priv) 555 { 556 return (SYN_CAP_ADV_GESTURE(priv->info.ext_cap_0c) || 557 SYN_CAP_IMAGE_SENSOR(priv->info.ext_cap_0c)); 558 } 559 560 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 561 { 562 static u8 param = 0xc8; 563 int error; 564 565 error = ps2_sliced_command(&psmouse->ps2dev, SYN_QUE_MODEL); 566 if (error) 567 return error; 568 569 error = ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE); 570 if (error) 571 return error; 572 573 return 0; 574 } 575 576 static int synaptics_set_mode(struct psmouse *psmouse) 577 { 578 struct synaptics_data *priv = psmouse->private; 579 int error; 580 581 priv->mode = 0; 582 if (priv->absolute_mode) 583 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 584 if (priv->disable_gesture) 585 priv->mode |= SYN_BIT_DISABLE_GESTURE; 586 if (psmouse->rate >= 80) 587 priv->mode |= SYN_BIT_HIGH_RATE; 588 if (SYN_CAP_EXTENDED(priv->info.capabilities)) 589 priv->mode |= SYN_BIT_W_MODE; 590 591 error = synaptics_mode_cmd(psmouse, priv->mode); 592 if (error) 593 return error; 594 595 if (priv->absolute_mode && synaptics_has_agm(priv)) { 596 error = synaptics_set_advanced_gesture_mode(psmouse); 597 if (error) { 598 psmouse_err(psmouse, 599 "Advanced gesture mode init failed: %d\n", 600 error); 601 return error; 602 } 603 } 604 605 return 0; 606 } 607 608 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 609 { 610 struct synaptics_data *priv = psmouse->private; 611 612 if (rate >= 80) { 613 priv->mode |= SYN_BIT_HIGH_RATE; 614 psmouse->rate = 80; 615 } else { 616 priv->mode &= ~SYN_BIT_HIGH_RATE; 617 psmouse->rate = 40; 618 } 619 620 synaptics_mode_cmd(psmouse, priv->mode); 621 } 622 623 /***************************************************************************** 624 * Synaptics pass-through PS/2 port support 625 ****************************************************************************/ 626 static int synaptics_pt_write(struct serio *serio, u8 c) 627 { 628 struct psmouse *parent = serio_get_drvdata(serio->parent); 629 u8 rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 630 int error; 631 632 error = ps2_sliced_command(&parent->ps2dev, c); 633 if (error) 634 return error; 635 636 error = ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE); 637 if (error) 638 return error; 639 640 return 0; 641 } 642 643 static int synaptics_pt_start(struct serio *serio) 644 { 645 struct psmouse *parent = serio_get_drvdata(serio->parent); 646 struct synaptics_data *priv = parent->private; 647 648 serio_pause_rx(parent->ps2dev.serio); 649 priv->pt_port = serio; 650 serio_continue_rx(parent->ps2dev.serio); 651 652 return 0; 653 } 654 655 static void synaptics_pt_stop(struct serio *serio) 656 { 657 struct psmouse *parent = serio_get_drvdata(serio->parent); 658 struct synaptics_data *priv = parent->private; 659 660 serio_pause_rx(parent->ps2dev.serio); 661 priv->pt_port = NULL; 662 serio_continue_rx(parent->ps2dev.serio); 663 } 664 665 static int synaptics_is_pt_packet(u8 *buf) 666 { 667 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 668 } 669 670 static void synaptics_pass_pt_packet(struct serio *ptport, u8 *packet) 671 { 672 struct psmouse *child = serio_get_drvdata(ptport); 673 674 if (child && child->state == PSMOUSE_ACTIVATED) { 675 serio_interrupt(ptport, packet[1], 0); 676 serio_interrupt(ptport, packet[4], 0); 677 serio_interrupt(ptport, packet[5], 0); 678 if (child->pktsize == 4) 679 serio_interrupt(ptport, packet[2], 0); 680 } else { 681 serio_interrupt(ptport, packet[1], 0); 682 } 683 } 684 685 static void synaptics_pt_activate(struct psmouse *psmouse) 686 { 687 struct synaptics_data *priv = psmouse->private; 688 struct psmouse *child = serio_get_drvdata(priv->pt_port); 689 690 /* adjust the touchpad to child's choice of protocol */ 691 if (child) { 692 if (child->pktsize == 4) 693 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 694 else 695 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 696 697 if (synaptics_mode_cmd(psmouse, priv->mode)) 698 psmouse_warn(psmouse, 699 "failed to switch guest protocol\n"); 700 } 701 } 702 703 static void synaptics_pt_create(struct psmouse *psmouse) 704 { 705 struct serio *serio; 706 707 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 708 if (!serio) { 709 psmouse_err(psmouse, 710 "not enough memory for pass-through port\n"); 711 return; 712 } 713 714 serio->id.type = SERIO_PS_PSTHRU; 715 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 716 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->phys)); 717 serio->write = synaptics_pt_write; 718 serio->start = synaptics_pt_start; 719 serio->stop = synaptics_pt_stop; 720 serio->parent = psmouse->ps2dev.serio; 721 722 psmouse->pt_activate = synaptics_pt_activate; 723 724 psmouse_info(psmouse, "serio: %s port at %s\n", 725 serio->name, psmouse->phys); 726 serio_register_port(serio); 727 } 728 729 /***************************************************************************** 730 * Functions to interpret the absolute mode packets 731 ****************************************************************************/ 732 733 static void synaptics_parse_agm(const u8 buf[], 734 struct synaptics_data *priv, 735 struct synaptics_hw_state *hw) 736 { 737 struct synaptics_hw_state *agm = &priv->agm; 738 int agm_packet_type; 739 740 agm_packet_type = (buf[5] & 0x30) >> 4; 741 switch (agm_packet_type) { 742 case 1: 743 /* Gesture packet: (x, y, z) half resolution */ 744 agm->w = hw->w; 745 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 746 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 747 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 748 break; 749 750 case 2: 751 /* AGM-CONTACT packet: we are only interested in the count */ 752 priv->agm_count = buf[1]; 753 break; 754 755 default: 756 break; 757 } 758 } 759 760 static void synaptics_parse_ext_buttons(const u8 buf[], 761 struct synaptics_data *priv, 762 struct synaptics_hw_state *hw) 763 { 764 unsigned int ext_bits = 765 (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 766 unsigned int ext_mask = GENMASK(ext_bits - 1, 0); 767 768 hw->ext_buttons = buf[4] & ext_mask; 769 hw->ext_buttons |= (buf[5] & ext_mask) << ext_bits; 770 } 771 772 static int synaptics_parse_hw_state(const u8 buf[], 773 struct synaptics_data *priv, 774 struct synaptics_hw_state *hw) 775 { 776 memset(hw, 0, sizeof(struct synaptics_hw_state)); 777 778 if (SYN_MODEL_NEWABS(priv->info.model_id)) { 779 hw->w = (((buf[0] & 0x30) >> 2) | 780 ((buf[0] & 0x04) >> 1) | 781 ((buf[3] & 0x04) >> 2)); 782 783 if (synaptics_has_agm(priv) && hw->w == 2) { 784 synaptics_parse_agm(buf, priv, hw); 785 return 1; 786 } 787 788 hw->x = (((buf[3] & 0x10) << 8) | 789 ((buf[1] & 0x0f) << 8) | 790 buf[4]); 791 hw->y = (((buf[3] & 0x20) << 7) | 792 ((buf[1] & 0xf0) << 4) | 793 buf[5]); 794 hw->z = buf[2]; 795 796 hw->left = (buf[0] & 0x01) ? 1 : 0; 797 hw->right = (buf[0] & 0x02) ? 1 : 0; 798 799 if (priv->is_forcepad) { 800 /* 801 * ForcePads, like Clickpads, use middle button 802 * bits to report primary button clicks. 803 * Unfortunately they report primary button not 804 * only when user presses on the pad above certain 805 * threshold, but also when there are more than one 806 * finger on the touchpad, which interferes with 807 * out multi-finger gestures. 808 */ 809 if (hw->z == 0) { 810 /* No contacts */ 811 priv->press = priv->report_press = false; 812 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 813 /* 814 * Single-finger touch with pressure above 815 * the threshold. If pressure stays long 816 * enough, we'll start reporting primary 817 * button. We rely on the device continuing 818 * sending data even if finger does not 819 * move. 820 */ 821 if (!priv->press) { 822 priv->press_start = jiffies; 823 priv->press = true; 824 } else if (time_after(jiffies, 825 priv->press_start + 826 msecs_to_jiffies(50))) { 827 priv->report_press = true; 828 } 829 } else { 830 priv->press = false; 831 } 832 833 hw->left = priv->report_press; 834 835 } else if (SYN_CAP_CLICKPAD(priv->info.ext_cap_0c)) { 836 /* 837 * Clickpad's button is transmitted as middle button, 838 * however, since it is primary button, we will report 839 * it as BTN_LEFT. 840 */ 841 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 842 843 } else if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) { 844 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 845 if (hw->w == 2) 846 hw->scroll = (s8)buf[1]; 847 } 848 849 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 850 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 851 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 852 } 853 854 if (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) > 0 && 855 ((buf[0] ^ buf[3]) & 0x02)) { 856 synaptics_parse_ext_buttons(buf, priv, hw); 857 } 858 } else { 859 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 860 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 861 862 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 863 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 864 865 hw->left = (buf[0] & 0x01) ? 1 : 0; 866 hw->right = (buf[0] & 0x02) ? 1 : 0; 867 } 868 869 /* 870 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 871 * is used by some firmware to indicate a finger at the edge of 872 * the touchpad whose precise position cannot be determined, so 873 * convert these values to the maximum axis value. 874 */ 875 if (hw->x > X_MAX_POSITIVE) 876 hw->x -= 1 << ABS_POS_BITS; 877 else if (hw->x == X_MAX_POSITIVE) 878 hw->x = XMAX; 879 880 if (hw->y > Y_MAX_POSITIVE) 881 hw->y -= 1 << ABS_POS_BITS; 882 else if (hw->y == Y_MAX_POSITIVE) 883 hw->y = YMAX; 884 885 return 0; 886 } 887 888 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 889 bool active, int x, int y) 890 { 891 input_mt_slot(dev, slot); 892 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 893 if (active) { 894 input_report_abs(dev, ABS_MT_POSITION_X, x); 895 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 896 } 897 } 898 899 static void synaptics_report_semi_mt_data(struct input_dev *dev, 900 const struct synaptics_hw_state *a, 901 const struct synaptics_hw_state *b, 902 int num_fingers) 903 { 904 if (num_fingers >= 2) { 905 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 906 min(a->y, b->y)); 907 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 908 max(a->y, b->y)); 909 } else if (num_fingers == 1) { 910 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 911 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 912 } else { 913 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 914 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 915 } 916 } 917 918 static void synaptics_report_ext_buttons(struct psmouse *psmouse, 919 const struct synaptics_hw_state *hw) 920 { 921 struct input_dev *dev = psmouse->dev; 922 struct synaptics_data *priv = psmouse->private; 923 int ext_bits = (SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap) + 1) >> 1; 924 int i; 925 926 if (!SYN_CAP_MULTI_BUTTON_NO(priv->info.ext_cap)) 927 return; 928 929 /* Bug in FW 8.1 & 8.2, buttons are reported only when ExtBit is 1 */ 930 if ((SYN_ID_FULL(priv->info.identity) == 0x801 || 931 SYN_ID_FULL(priv->info.identity) == 0x802) && 932 !((psmouse->packet[0] ^ psmouse->packet[3]) & 0x02)) 933 return; 934 935 if (!SYN_CAP_EXT_BUTTONS_STICK(priv->info.ext_cap_10)) { 936 for (i = 0; i < ext_bits; i++) { 937 input_report_key(dev, BTN_0 + 2 * i, 938 hw->ext_buttons & BIT(i)); 939 input_report_key(dev, BTN_1 + 2 * i, 940 hw->ext_buttons & BIT(i + ext_bits)); 941 } 942 return; 943 } 944 945 /* 946 * This generation of touchpads has the trackstick buttons 947 * physically wired to the touchpad. Re-route them through 948 * the pass-through interface. 949 */ 950 if (priv->pt_port) { 951 u8 pt_buttons; 952 953 /* The trackstick expects at most 3 buttons */ 954 pt_buttons = SYN_EXT_BUTTON_STICK_L(hw->ext_buttons) | 955 SYN_EXT_BUTTON_STICK_R(hw->ext_buttons) << 1 | 956 SYN_EXT_BUTTON_STICK_M(hw->ext_buttons) << 2; 957 958 serio_interrupt(priv->pt_port, 959 PSMOUSE_OOB_EXTRA_BTNS, SERIO_OOB_DATA); 960 serio_interrupt(priv->pt_port, pt_buttons, SERIO_OOB_DATA); 961 } 962 } 963 964 static void synaptics_report_buttons(struct psmouse *psmouse, 965 const struct synaptics_hw_state *hw) 966 { 967 struct input_dev *dev = psmouse->dev; 968 struct synaptics_data *priv = psmouse->private; 969 970 input_report_key(dev, BTN_LEFT, hw->left); 971 input_report_key(dev, BTN_RIGHT, hw->right); 972 973 if (SYN_CAP_MIDDLE_BUTTON(priv->info.capabilities)) 974 input_report_key(dev, BTN_MIDDLE, hw->middle); 975 976 if (SYN_CAP_FOUR_BUTTON(priv->info.capabilities)) { 977 input_report_key(dev, BTN_FORWARD, hw->up); 978 input_report_key(dev, BTN_BACK, hw->down); 979 } 980 981 synaptics_report_ext_buttons(psmouse, hw); 982 } 983 984 static void synaptics_report_mt_data(struct psmouse *psmouse, 985 const struct synaptics_hw_state *sgm, 986 int num_fingers) 987 { 988 struct input_dev *dev = psmouse->dev; 989 struct synaptics_data *priv = psmouse->private; 990 const struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 991 struct input_mt_pos pos[2]; 992 int slot[2], nsemi, i; 993 994 nsemi = clamp_val(num_fingers, 0, 2); 995 996 for (i = 0; i < nsemi; i++) { 997 pos[i].x = hw[i]->x; 998 pos[i].y = synaptics_invert_y(hw[i]->y); 999 } 1000 1001 input_mt_assign_slots(dev, slot, pos, nsemi, DMAX * priv->info.x_res); 1002 1003 for (i = 0; i < nsemi; i++) { 1004 input_mt_slot(dev, slot[i]); 1005 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1006 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1007 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1008 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1009 } 1010 1011 input_mt_drop_unused(dev); 1012 1013 /* Don't use active slot count to generate BTN_TOOL events. */ 1014 input_mt_report_pointer_emulation(dev, false); 1015 1016 /* Send the number of fingers reported by touchpad itself. */ 1017 input_mt_report_finger_count(dev, num_fingers); 1018 1019 synaptics_report_buttons(psmouse, sgm); 1020 1021 input_sync(dev); 1022 } 1023 1024 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1025 struct synaptics_hw_state *sgm) 1026 { 1027 struct synaptics_data *priv = psmouse->private; 1028 int num_fingers; 1029 1030 /* 1031 * Update mt_state using the new finger count and current mt_state. 1032 */ 1033 if (sgm->z == 0) 1034 num_fingers = 0; 1035 else if (sgm->w >= 4) 1036 num_fingers = 1; 1037 else if (sgm->w == 0) 1038 num_fingers = 2; 1039 else if (sgm->w == 1) 1040 num_fingers = priv->agm_count ? priv->agm_count : 3; 1041 else 1042 num_fingers = 4; 1043 1044 /* Send resulting input events to user space */ 1045 synaptics_report_mt_data(psmouse, sgm, num_fingers); 1046 } 1047 1048 static bool synaptics_has_multifinger(struct synaptics_data *priv) 1049 { 1050 if (SYN_CAP_MULTIFINGER(priv->info.capabilities)) 1051 return true; 1052 1053 /* Advanced gesture mode also sends multi finger data */ 1054 return synaptics_has_agm(priv); 1055 } 1056 1057 /* 1058 * called for each full received packet from the touchpad 1059 */ 1060 static void synaptics_process_packet(struct psmouse *psmouse) 1061 { 1062 struct input_dev *dev = psmouse->dev; 1063 struct synaptics_data *priv = psmouse->private; 1064 struct synaptics_device_info *info = &priv->info; 1065 struct synaptics_hw_state hw; 1066 int num_fingers; 1067 int finger_width; 1068 1069 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1070 return; 1071 1072 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1073 synaptics_image_sensor_process(psmouse, &hw); 1074 return; 1075 } 1076 1077 if (hw.scroll) { 1078 priv->scroll += hw.scroll; 1079 1080 while (priv->scroll >= 4) { 1081 input_report_key(dev, BTN_BACK, !hw.down); 1082 input_sync(dev); 1083 input_report_key(dev, BTN_BACK, hw.down); 1084 input_sync(dev); 1085 priv->scroll -= 4; 1086 } 1087 while (priv->scroll <= -4) { 1088 input_report_key(dev, BTN_FORWARD, !hw.up); 1089 input_sync(dev); 1090 input_report_key(dev, BTN_FORWARD, hw.up); 1091 input_sync(dev); 1092 priv->scroll += 4; 1093 } 1094 return; 1095 } 1096 1097 if (hw.z > 0 && hw.x > 1) { 1098 num_fingers = 1; 1099 finger_width = 5; 1100 if (SYN_CAP_EXTENDED(info->capabilities)) { 1101 switch (hw.w) { 1102 case 0 ... 1: 1103 if (synaptics_has_multifinger(priv)) 1104 num_fingers = hw.w + 2; 1105 break; 1106 case 2: 1107 if (SYN_MODEL_PEN(info->model_id)) 1108 ; /* Nothing, treat a pen as a single finger */ 1109 break; 1110 case 4 ... 15: 1111 if (SYN_CAP_PALMDETECT(info->capabilities)) 1112 finger_width = hw.w; 1113 break; 1114 } 1115 } 1116 } else { 1117 num_fingers = 0; 1118 finger_width = 0; 1119 } 1120 1121 if (cr48_profile_sensor) { 1122 synaptics_report_mt_data(psmouse, &hw, num_fingers); 1123 return; 1124 } 1125 1126 if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) 1127 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1128 num_fingers); 1129 1130 /* Post events 1131 * BTN_TOUCH has to be first as mousedev relies on it when doing 1132 * absolute -> relative conversion 1133 */ 1134 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1135 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1136 1137 if (num_fingers > 0) { 1138 input_report_abs(dev, ABS_X, hw.x); 1139 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1140 } 1141 input_report_abs(dev, ABS_PRESSURE, hw.z); 1142 1143 if (SYN_CAP_PALMDETECT(info->capabilities)) 1144 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1145 1146 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1147 if (synaptics_has_multifinger(priv)) { 1148 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1149 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1150 } 1151 1152 synaptics_report_buttons(psmouse, &hw); 1153 1154 input_sync(dev); 1155 } 1156 1157 static bool synaptics_validate_byte(struct psmouse *psmouse, 1158 int idx, enum synaptics_pkt_type pkt_type) 1159 { 1160 static const u8 newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1161 static const u8 newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1162 static const u8 newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1163 static const u8 oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1164 static const u8 oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1165 const u8 *packet = psmouse->packet; 1166 1167 if (idx < 0 || idx > 4) 1168 return false; 1169 1170 switch (pkt_type) { 1171 1172 case SYN_NEWABS: 1173 case SYN_NEWABS_RELAXED: 1174 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1175 1176 case SYN_NEWABS_STRICT: 1177 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1178 1179 case SYN_OLDABS: 1180 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1181 1182 default: 1183 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1184 return false; 1185 } 1186 } 1187 1188 static enum synaptics_pkt_type 1189 synaptics_detect_pkt_type(struct psmouse *psmouse) 1190 { 1191 int i; 1192 1193 for (i = 0; i < 5; i++) { 1194 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1195 psmouse_info(psmouse, "using relaxed packet validation\n"); 1196 return SYN_NEWABS_RELAXED; 1197 } 1198 } 1199 1200 return SYN_NEWABS_STRICT; 1201 } 1202 1203 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1204 { 1205 struct synaptics_data *priv = psmouse->private; 1206 1207 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1208 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1209 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1210 1211 if (SYN_CAP_PASS_THROUGH(priv->info.capabilities) && 1212 synaptics_is_pt_packet(psmouse->packet)) { 1213 if (priv->pt_port) 1214 synaptics_pass_pt_packet(priv->pt_port, 1215 psmouse->packet); 1216 } else 1217 synaptics_process_packet(psmouse); 1218 1219 return PSMOUSE_FULL_PACKET; 1220 } 1221 1222 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1223 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1224 } 1225 1226 /***************************************************************************** 1227 * Driver initialization/cleanup functions 1228 ****************************************************************************/ 1229 static void set_abs_position_params(struct input_dev *dev, 1230 struct synaptics_device_info *info, 1231 int x_code, int y_code) 1232 { 1233 int x_min = info->x_min ?: XMIN_NOMINAL; 1234 int x_max = info->x_max ?: XMAX_NOMINAL; 1235 int y_min = info->y_min ?: YMIN_NOMINAL; 1236 int y_max = info->y_max ?: YMAX_NOMINAL; 1237 int fuzz = SYN_CAP_REDUCED_FILTERING(info->ext_cap_0c) ? 1238 SYN_REDUCED_FILTER_FUZZ : 0; 1239 1240 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1241 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1242 input_abs_set_res(dev, x_code, info->x_res); 1243 input_abs_set_res(dev, y_code, info->y_res); 1244 } 1245 1246 static int set_input_params(struct psmouse *psmouse, 1247 struct synaptics_data *priv) 1248 { 1249 struct input_dev *dev = psmouse->dev; 1250 struct synaptics_device_info *info = &priv->info; 1251 int i; 1252 int error; 1253 1254 /* Reset default psmouse capabilities */ 1255 __clear_bit(EV_REL, dev->evbit); 1256 bitmap_zero(dev->relbit, REL_CNT); 1257 bitmap_zero(dev->keybit, KEY_CNT); 1258 1259 /* Things that apply to both modes */ 1260 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1261 1262 input_set_capability(dev, EV_KEY, BTN_LEFT); 1263 1264 /* Clickpads report only left button */ 1265 if (!SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1266 input_set_capability(dev, EV_KEY, BTN_RIGHT); 1267 if (SYN_CAP_MIDDLE_BUTTON(info->capabilities)) 1268 input_set_capability(dev, EV_KEY, BTN_MIDDLE); 1269 } 1270 1271 if (!priv->absolute_mode) { 1272 /* Relative mode */ 1273 input_set_capability(dev, EV_REL, REL_X); 1274 input_set_capability(dev, EV_REL, REL_Y); 1275 return 0; 1276 } 1277 1278 /* Absolute mode */ 1279 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1280 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1281 1282 if (cr48_profile_sensor) 1283 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1284 1285 if (SYN_CAP_IMAGE_SENSOR(info->ext_cap_0c)) { 1286 set_abs_position_params(dev, info, 1287 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1288 /* Image sensors can report per-contact pressure */ 1289 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1290 1291 error = input_mt_init_slots(dev, 2, 1292 INPUT_MT_POINTER | INPUT_MT_TRACK); 1293 if (error) 1294 return error; 1295 1296 /* Image sensors can signal 4 and 5 finger clicks */ 1297 input_set_capability(dev, EV_KEY, BTN_TOOL_QUADTAP); 1298 input_set_capability(dev, EV_KEY, BTN_TOOL_QUINTTAP); 1299 } else if (SYN_CAP_ADV_GESTURE(info->ext_cap_0c)) { 1300 set_abs_position_params(dev, info, 1301 ABS_MT_POSITION_X, ABS_MT_POSITION_Y); 1302 /* 1303 * Profile sensor in CR-48 tracks contacts reasonably well, 1304 * other non-image sensors with AGM use semi-mt. 1305 */ 1306 error = input_mt_init_slots(dev, 2, 1307 INPUT_MT_POINTER | 1308 (cr48_profile_sensor ? 1309 INPUT_MT_TRACK : 1310 INPUT_MT_SEMI_MT)); 1311 if (error) 1312 return error; 1313 1314 /* 1315 * For semi-mt devices we send ABS_X/Y ourselves instead of 1316 * input_mt_report_pointer_emulation. But 1317 * input_mt_init_slots() resets the fuzz to 0, leading to a 1318 * filtered ABS_MT_POSITION_X but an unfiltered ABS_X 1319 * position. Let's re-initialize ABS_X/Y here. 1320 */ 1321 if (!cr48_profile_sensor) 1322 set_abs_position_params(dev, &priv->info, ABS_X, ABS_Y); 1323 } 1324 1325 if (SYN_CAP_PALMDETECT(info->capabilities)) 1326 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1327 1328 input_set_capability(dev, EV_KEY, BTN_TOUCH); 1329 input_set_capability(dev, EV_KEY, BTN_TOOL_FINGER); 1330 1331 if (synaptics_has_multifinger(priv)) { 1332 input_set_capability(dev, EV_KEY, BTN_TOOL_DOUBLETAP); 1333 input_set_capability(dev, EV_KEY, BTN_TOOL_TRIPLETAP); 1334 } 1335 1336 if (SYN_CAP_FOUR_BUTTON(info->capabilities) || 1337 SYN_CAP_MIDDLE_BUTTON(info->capabilities)) { 1338 input_set_capability(dev, EV_KEY, BTN_FORWARD); 1339 input_set_capability(dev, EV_KEY, BTN_BACK); 1340 } 1341 1342 if (!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1343 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(info->ext_cap); i++) 1344 input_set_capability(dev, EV_KEY, BTN_0 + i); 1345 1346 if (SYN_CAP_CLICKPAD(info->ext_cap_0c)) { 1347 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1348 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1349 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10)) 1350 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1351 } 1352 1353 return 0; 1354 } 1355 1356 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1357 void *data, char *buf) 1358 { 1359 struct synaptics_data *priv = psmouse->private; 1360 1361 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1362 } 1363 1364 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1365 void *data, const char *buf, 1366 size_t len) 1367 { 1368 struct synaptics_data *priv = psmouse->private; 1369 unsigned int value; 1370 int err; 1371 1372 err = kstrtouint(buf, 10, &value); 1373 if (err) 1374 return err; 1375 1376 if (value > 1) 1377 return -EINVAL; 1378 1379 if (value == priv->disable_gesture) 1380 return len; 1381 1382 priv->disable_gesture = value; 1383 if (value) 1384 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1385 else 1386 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1387 1388 if (synaptics_mode_cmd(psmouse, priv->mode)) 1389 return -EIO; 1390 1391 return len; 1392 } 1393 1394 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1395 synaptics_show_disable_gesture, 1396 synaptics_set_disable_gesture); 1397 1398 static void synaptics_disconnect(struct psmouse *psmouse) 1399 { 1400 struct synaptics_data *priv = psmouse->private; 1401 1402 /* 1403 * We might have left a breadcrumb when trying to 1404 * set up SMbus companion. 1405 */ 1406 psmouse_smbus_cleanup(psmouse); 1407 1408 if (!priv->absolute_mode && 1409 SYN_ID_DISGEST_SUPPORTED(priv->info.identity)) 1410 device_remove_file(&psmouse->ps2dev.serio->dev, 1411 &psmouse_attr_disable_gesture.dattr); 1412 1413 synaptics_reset(psmouse); 1414 kfree(priv); 1415 psmouse->private = NULL; 1416 } 1417 1418 static int synaptics_reconnect(struct psmouse *psmouse) 1419 { 1420 struct synaptics_data *priv = psmouse->private; 1421 struct synaptics_device_info info; 1422 u8 param[2]; 1423 int retry = 0; 1424 int error; 1425 1426 do { 1427 psmouse_reset(psmouse); 1428 if (retry) { 1429 /* 1430 * On some boxes, right after resuming, the touchpad 1431 * needs some time to finish initializing (I assume 1432 * it needs time to calibrate) and start responding 1433 * to Synaptics-specific queries, so let's wait a 1434 * bit. 1435 */ 1436 ssleep(1); 1437 } 1438 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1439 error = synaptics_detect(psmouse, 0); 1440 } while (error && ++retry < 3); 1441 1442 if (error) 1443 return error; 1444 1445 if (retry > 1) 1446 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1447 1448 error = synaptics_query_hardware(psmouse, &info); 1449 if (error) { 1450 psmouse_err(psmouse, "Unable to query device.\n"); 1451 return error; 1452 } 1453 1454 error = synaptics_set_mode(psmouse); 1455 if (error) { 1456 psmouse_err(psmouse, "Unable to initialize device.\n"); 1457 return error; 1458 } 1459 1460 if (info.identity != priv->info.identity || 1461 info.model_id != priv->info.model_id || 1462 info.capabilities != priv->info.capabilities || 1463 info.ext_cap != priv->info.ext_cap) { 1464 psmouse_err(psmouse, 1465 "hardware appears to be different: id(%u-%u), model(%u-%u), caps(%x-%x), ext(%x-%x).\n", 1466 priv->info.identity, info.identity, 1467 priv->info.model_id, info.model_id, 1468 priv->info.capabilities, info.capabilities, 1469 priv->info.ext_cap, info.ext_cap); 1470 return -ENXIO; 1471 } 1472 1473 return 0; 1474 } 1475 1476 static bool impaired_toshiba_kbc; 1477 1478 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1479 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1480 { 1481 /* Toshiba Satellite */ 1482 .matches = { 1483 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1484 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1485 }, 1486 }, 1487 { 1488 /* Toshiba Dynabook */ 1489 .matches = { 1490 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1491 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1492 }, 1493 }, 1494 { 1495 /* Toshiba Portege M300 */ 1496 .matches = { 1497 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1498 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1499 }, 1500 1501 }, 1502 { 1503 /* Toshiba Portege M300 */ 1504 .matches = { 1505 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1506 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1507 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1508 }, 1509 1510 }, 1511 #endif 1512 { } 1513 }; 1514 1515 static bool broken_olpc_ec; 1516 1517 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1518 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1519 { 1520 /* OLPC XO-1 or XO-1.5 */ 1521 .matches = { 1522 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1523 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1524 }, 1525 }, 1526 #endif 1527 { } 1528 }; 1529 1530 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1531 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1532 { 1533 /* Cr-48 Chromebook (Codename Mario) */ 1534 .matches = { 1535 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1536 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1537 }, 1538 }, 1539 #endif 1540 { } 1541 }; 1542 1543 void __init synaptics_module_init(void) 1544 { 1545 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1546 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1547 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1548 } 1549 1550 static int synaptics_init_ps2(struct psmouse *psmouse, 1551 struct synaptics_device_info *info, 1552 bool absolute_mode) 1553 { 1554 struct synaptics_data *priv; 1555 int err; 1556 1557 synaptics_apply_quirks(psmouse, info); 1558 1559 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1560 if (!priv) 1561 return -ENOMEM; 1562 1563 priv->info = *info; 1564 priv->absolute_mode = absolute_mode; 1565 if (SYN_ID_DISGEST_SUPPORTED(info->identity)) 1566 priv->disable_gesture = true; 1567 1568 /* 1569 * Unfortunately ForcePad capability is not exported over PS/2, 1570 * so we have to resort to checking PNP IDs. 1571 */ 1572 priv->is_forcepad = psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids); 1573 1574 err = synaptics_set_mode(psmouse); 1575 if (err) { 1576 psmouse_err(psmouse, "Unable to initialize device.\n"); 1577 goto init_fail; 1578 } 1579 1580 priv->pkt_type = SYN_MODEL_NEWABS(info->model_id) ? 1581 SYN_NEWABS : SYN_OLDABS; 1582 1583 psmouse_info(psmouse, 1584 "Touchpad model: %lu, fw: %lu.%lu, id: %#x, caps: %#x/%#x/%#x/%#x, board id: %u, fw id: %u\n", 1585 SYN_ID_MODEL(info->identity), 1586 SYN_ID_MAJOR(info->identity), SYN_ID_MINOR(info->identity), 1587 info->model_id, 1588 info->capabilities, info->ext_cap, info->ext_cap_0c, 1589 info->ext_cap_10, info->board_id, info->firmware_id); 1590 1591 err = set_input_params(psmouse, priv); 1592 if (err) { 1593 psmouse_err(psmouse, 1594 "failed to set up capabilities: %d\n", err); 1595 goto init_fail; 1596 } 1597 1598 /* 1599 * Encode touchpad model so that it can be used to set 1600 * input device->id.version and be visible to userspace. 1601 * Because version is __u16 we have to drop something. 1602 * Hardware info bits seem to be good candidates as they 1603 * are documented to be for Synaptics corp. internal use. 1604 */ 1605 psmouse->model = ((info->model_id & 0x00ff0000) >> 8) | 1606 (info->model_id & 0x000000ff); 1607 1608 if (absolute_mode) { 1609 psmouse->protocol_handler = synaptics_process_byte; 1610 psmouse->pktsize = 6; 1611 } else { 1612 /* Relative mode follows standard PS/2 mouse protocol */ 1613 psmouse->protocol_handler = psmouse_process_byte; 1614 psmouse->pktsize = 3; 1615 } 1616 1617 psmouse->set_rate = synaptics_set_rate; 1618 psmouse->disconnect = synaptics_disconnect; 1619 psmouse->reconnect = synaptics_reconnect; 1620 psmouse->cleanup = synaptics_reset; 1621 /* Synaptics can usually stay in sync without extra help */ 1622 psmouse->resync_time = 0; 1623 1624 if (SYN_CAP_PASS_THROUGH(info->capabilities)) 1625 synaptics_pt_create(psmouse); 1626 1627 /* 1628 * Toshiba's KBC seems to have trouble handling data from 1629 * Synaptics at full rate. Switch to a lower rate (roughly 1630 * the same rate as a standard PS/2 mouse). 1631 */ 1632 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1633 psmouse_info(psmouse, 1634 "Toshiba %s detected, limiting rate to 40pps.\n", 1635 dmi_get_system_info(DMI_PRODUCT_NAME)); 1636 psmouse->rate = 40; 1637 } 1638 1639 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(info->identity)) { 1640 err = device_create_file(&psmouse->ps2dev.serio->dev, 1641 &psmouse_attr_disable_gesture.dattr); 1642 if (err) { 1643 psmouse_err(psmouse, 1644 "Failed to create disable_gesture attribute (%d)", 1645 err); 1646 goto init_fail; 1647 } 1648 } 1649 1650 return 0; 1651 1652 init_fail: 1653 kfree(priv); 1654 return err; 1655 } 1656 1657 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1658 { 1659 struct synaptics_device_info info; 1660 int error; 1661 1662 psmouse_reset(psmouse); 1663 1664 error = synaptics_query_hardware(psmouse, &info); 1665 if (error) { 1666 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1667 return error; 1668 } 1669 1670 return synaptics_init_ps2(psmouse, &info, absolute_mode); 1671 } 1672 1673 int synaptics_init_absolute(struct psmouse *psmouse) 1674 { 1675 return __synaptics_init(psmouse, true); 1676 } 1677 1678 int synaptics_init_relative(struct psmouse *psmouse) 1679 { 1680 return __synaptics_init(psmouse, false); 1681 } 1682 1683 static int synaptics_setup_ps2(struct psmouse *psmouse, 1684 struct synaptics_device_info *info) 1685 { 1686 bool absolute_mode = true; 1687 int error; 1688 1689 /* 1690 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1691 * packet spew overloads the EC such that key presses on the keyboard 1692 * are missed. Given that, don't even attempt to use Absolute mode. 1693 * Relative mode seems to work just fine. 1694 */ 1695 if (broken_olpc_ec) { 1696 psmouse_info(psmouse, 1697 "OLPC XO detected, forcing relative protocol.\n"); 1698 absolute_mode = false; 1699 } 1700 1701 error = synaptics_init_ps2(psmouse, info, absolute_mode); 1702 if (error) 1703 return error; 1704 1705 return absolute_mode ? PSMOUSE_SYNAPTICS : PSMOUSE_SYNAPTICS_RELATIVE; 1706 } 1707 1708 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1709 1710 void __init synaptics_module_init(void) 1711 { 1712 } 1713 1714 static int __maybe_unused 1715 synaptics_setup_ps2(struct psmouse *psmouse, 1716 struct synaptics_device_info *info) 1717 { 1718 return -ENOSYS; 1719 } 1720 1721 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1722 1723 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS 1724 1725 /* 1726 * The newest Synaptics device can use a secondary bus (called InterTouch) which 1727 * provides a better bandwidth and allow a better control of the touchpads. 1728 * This is used to decide if we need to use this bus or not. 1729 */ 1730 enum { 1731 SYNAPTICS_INTERTOUCH_NOT_SET = -1, 1732 SYNAPTICS_INTERTOUCH_OFF, 1733 SYNAPTICS_INTERTOUCH_ON, 1734 }; 1735 1736 static int synaptics_intertouch = IS_ENABLED(CONFIG_RMI4_SMB) ? 1737 SYNAPTICS_INTERTOUCH_NOT_SET : SYNAPTICS_INTERTOUCH_OFF; 1738 module_param_named(synaptics_intertouch, synaptics_intertouch, int, 0644); 1739 MODULE_PARM_DESC(synaptics_intertouch, "Use a secondary bus for the Synaptics device."); 1740 1741 static int synaptics_create_intertouch(struct psmouse *psmouse, 1742 struct synaptics_device_info *info, 1743 bool leave_breadcrumbs) 1744 { 1745 bool topbuttonpad = 1746 psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1747 !SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10); 1748 const struct rmi_device_platform_data pdata = { 1749 .sensor_pdata = { 1750 .sensor_type = rmi_sensor_touchpad, 1751 .axis_align.flip_y = true, 1752 .kernel_tracking = false, 1753 .topbuttonpad = topbuttonpad, 1754 }, 1755 .gpio_data = { 1756 .buttonpad = SYN_CAP_CLICKPAD(info->ext_cap_0c), 1757 .trackstick_buttons = 1758 !!SYN_CAP_EXT_BUTTONS_STICK(info->ext_cap_10), 1759 }, 1760 }; 1761 const struct i2c_board_info intertouch_board = { 1762 I2C_BOARD_INFO("rmi4_smbus", 0x2c), 1763 .flags = I2C_CLIENT_HOST_NOTIFY, 1764 }; 1765 1766 return psmouse_smbus_init(psmouse, &intertouch_board, 1767 &pdata, sizeof(pdata), true, 1768 leave_breadcrumbs); 1769 } 1770 1771 /** 1772 * synaptics_setup_intertouch - called once the PS/2 devices are enumerated 1773 * and decides to instantiate a SMBus InterTouch device. 1774 */ 1775 static int synaptics_setup_intertouch(struct psmouse *psmouse, 1776 struct synaptics_device_info *info, 1777 bool leave_breadcrumbs) 1778 { 1779 int error; 1780 1781 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_OFF) 1782 return -ENXIO; 1783 1784 if (synaptics_intertouch == SYNAPTICS_INTERTOUCH_NOT_SET) { 1785 if (!psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids) && 1786 !psmouse_matches_pnp_id(psmouse, smbus_pnp_ids)) { 1787 1788 if (!psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) 1789 psmouse_info(psmouse, 1790 "Your touchpad (%s) says it can support a different bus. " 1791 "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", 1792 psmouse->ps2dev.serio->firmware_id); 1793 1794 return -ENXIO; 1795 } 1796 } 1797 1798 psmouse_info(psmouse, "Trying to set up SMBus access\n"); 1799 1800 error = synaptics_create_intertouch(psmouse, info, leave_breadcrumbs); 1801 if (error) { 1802 if (error == -EAGAIN) 1803 psmouse_info(psmouse, "SMbus companion is not ready yet\n"); 1804 else 1805 psmouse_err(psmouse, "unable to create intertouch device\n"); 1806 1807 return error; 1808 } 1809 1810 return 0; 1811 } 1812 1813 int synaptics_init_smbus(struct psmouse *psmouse) 1814 { 1815 struct synaptics_device_info info; 1816 int error; 1817 1818 psmouse_reset(psmouse); 1819 1820 error = synaptics_query_hardware(psmouse, &info); 1821 if (error) { 1822 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1823 return error; 1824 } 1825 1826 if (!SYN_CAP_INTERTOUCH(info.ext_cap_0c)) 1827 return -ENXIO; 1828 1829 return synaptics_create_intertouch(psmouse, &info, false); 1830 } 1831 1832 #else /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1833 1834 static int __maybe_unused 1835 synaptics_setup_intertouch(struct psmouse *psmouse, 1836 struct synaptics_device_info *info, 1837 bool leave_breadcrumbs) 1838 { 1839 return -ENOSYS; 1840 } 1841 1842 int synaptics_init_smbus(struct psmouse *psmouse) 1843 { 1844 return -ENOSYS; 1845 } 1846 1847 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1848 1849 #if defined(CONFIG_MOUSE_PS2_SYNAPTICS) || \ 1850 defined(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS) 1851 1852 int synaptics_init(struct psmouse *psmouse) 1853 { 1854 struct synaptics_device_info info; 1855 int error; 1856 int retval; 1857 1858 psmouse_reset(psmouse); 1859 1860 error = synaptics_query_hardware(psmouse, &info); 1861 if (error) { 1862 psmouse_err(psmouse, "Unable to query device: %d\n", error); 1863 return error; 1864 } 1865 1866 if (SYN_CAP_INTERTOUCH(info.ext_cap_0c)) { 1867 if ((!IS_ENABLED(CONFIG_RMI4_SMB) || 1868 !IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) && 1869 /* Forcepads need F21, which is not ready */ 1870 !psmouse_matches_pnp_id(psmouse, forcepad_pnp_ids)) { 1871 psmouse_warn(psmouse, 1872 "The touchpad can support a better bus than the too old PS/2 protocol. " 1873 "Make sure MOUSE_PS2_SYNAPTICS_SMBUS and RMI4_SMB are enabled to get a better touchpad experience.\n"); 1874 } 1875 1876 error = synaptics_setup_intertouch(psmouse, &info, true); 1877 if (!error) 1878 return PSMOUSE_SYNAPTICS_SMBUS; 1879 } 1880 1881 retval = synaptics_setup_ps2(psmouse, &info); 1882 if (retval < 0) { 1883 /* 1884 * Not using any flavor of Synaptics support, so clean up 1885 * SMbus breadcrumbs, if any. 1886 */ 1887 psmouse_smbus_cleanup(psmouse); 1888 } 1889 1890 return retval; 1891 } 1892 1893 #else /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1894 1895 int synaptics_init(struct psmouse *psmouse) 1896 { 1897 return -ENOSYS; 1898 } 1899 1900 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS || CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS */ 1901