1 /* 2 * Synaptics TouchPad PS/2 mouse driver 3 * 4 * 2003 Dmitry Torokhov <dtor@mail.ru> 5 * Added support for pass-through port. Special thanks to Peter Berg Larsen 6 * for explaining various Synaptics quirks. 7 * 8 * 2003 Peter Osterlund <petero2@telia.com> 9 * Ported to 2.5 input device infrastructure. 10 * 11 * Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch> 12 * start merging tpconfig and gpm code to a xfree-input module 13 * adding some changes and extensions (ex. 3rd and 4th button) 14 * 15 * Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu> 16 * Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com> 17 * code for the special synaptics commands (from the tpconfig-source) 18 * 19 * This program is free software; you can redistribute it and/or modify it 20 * under the terms of the GNU General Public License version 2 as published by 21 * the Free Software Foundation. 22 * 23 * Trademarks are the property of their respective owners. 24 */ 25 26 #include <linux/module.h> 27 #include <linux/delay.h> 28 #include <linux/dmi.h> 29 #include <linux/input/mt.h> 30 #include <linux/serio.h> 31 #include <linux/libps2.h> 32 #include <linux/slab.h> 33 #include "psmouse.h" 34 #include "synaptics.h" 35 36 /* 37 * The x/y limits are taken from the Synaptics TouchPad interfacing Guide, 38 * section 2.3.2, which says that they should be valid regardless of the 39 * actual size of the sensor. 40 * Note that newer firmware allows querying device for maximum useable 41 * coordinates. 42 */ 43 #define XMIN 0 44 #define XMAX 6143 45 #define YMIN 0 46 #define YMAX 6143 47 #define XMIN_NOMINAL 1472 48 #define XMAX_NOMINAL 5472 49 #define YMIN_NOMINAL 1408 50 #define YMAX_NOMINAL 4448 51 52 /* Size in bits of absolute position values reported by the hardware */ 53 #define ABS_POS_BITS 13 54 55 /* 56 * These values should represent the absolute maximum value that will 57 * be reported for a positive position value. Some Synaptics firmware 58 * uses this value to indicate a finger near the edge of the touchpad 59 * whose precise position cannot be determined. 60 * 61 * At least one touchpad is known to report positions in excess of this 62 * value which are actually negative values truncated to the 13-bit 63 * reporting range. These values have never been observed to be lower 64 * than 8184 (i.e. -8), so we treat all values greater than 8176 as 65 * negative and any other value as positive. 66 */ 67 #define X_MAX_POSITIVE 8176 68 #define Y_MAX_POSITIVE 8176 69 70 /***************************************************************************** 71 * Stuff we need even when we do not want native Synaptics support 72 ****************************************************************************/ 73 74 /* 75 * Set the synaptics touchpad mode byte by special commands 76 */ 77 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode) 78 { 79 unsigned char param[1]; 80 81 if (psmouse_sliced_command(psmouse, mode)) 82 return -1; 83 param[0] = SYN_PS_SET_MODE2; 84 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE)) 85 return -1; 86 return 0; 87 } 88 89 int synaptics_detect(struct psmouse *psmouse, bool set_properties) 90 { 91 struct ps2dev *ps2dev = &psmouse->ps2dev; 92 unsigned char param[4]; 93 94 param[0] = 0; 95 96 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 97 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 98 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 99 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); 100 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); 101 102 if (param[1] != 0x47) 103 return -ENODEV; 104 105 if (set_properties) { 106 psmouse->vendor = "Synaptics"; 107 psmouse->name = "TouchPad"; 108 } 109 110 return 0; 111 } 112 113 void synaptics_reset(struct psmouse *psmouse) 114 { 115 /* reset touchpad back to relative mode, gestures enabled */ 116 synaptics_mode_cmd(psmouse, 0); 117 } 118 119 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS 120 121 static bool cr48_profile_sensor; 122 123 struct min_max_quirk { 124 const char * const *pnp_ids; 125 int x_min, x_max, y_min, y_max; 126 }; 127 128 static const struct min_max_quirk min_max_pnpid_table[] = { 129 { 130 (const char * const []){"LEN0033", NULL}, 131 1024, 5052, 2258, 4832 132 }, 133 { 134 (const char * const []){"LEN0035", "LEN0042", NULL}, 135 1232, 5710, 1156, 4696 136 }, 137 { 138 (const char * const []){"LEN0034", "LEN0036", "LEN0039", 139 "LEN2002", "LEN2004", NULL}, 140 1024, 5112, 2024, 4832 141 }, 142 { 143 (const char * const []){"LEN2001", NULL}, 144 1024, 5022, 2508, 4832 145 }, 146 { } 147 }; 148 149 /* This list has been kindly provided by Synaptics. */ 150 static const char * const topbuttonpad_pnp_ids[] = { 151 "LEN0017", 152 "LEN0018", 153 "LEN0019", 154 "LEN0023", 155 "LEN002A", 156 "LEN002B", 157 "LEN002C", 158 "LEN002D", 159 "LEN002E", 160 "LEN0033", /* Helix */ 161 "LEN0034", /* T431s, L440, L540, T540, W540, X1 Carbon 2nd */ 162 "LEN0035", /* X240 */ 163 "LEN0036", /* T440 */ 164 "LEN0037", 165 "LEN0038", 166 "LEN0039", /* T440s */ 167 "LEN0041", 168 "LEN0042", /* Yoga */ 169 "LEN0045", 170 "LEN0046", 171 "LEN0047", 172 "LEN0048", 173 "LEN0049", 174 "LEN2000", 175 "LEN2001", /* Edge E431 */ 176 "LEN2002", /* Edge E531 */ 177 "LEN2003", 178 "LEN2004", /* L440 */ 179 "LEN2005", 180 "LEN2006", 181 "LEN2007", 182 "LEN2008", 183 "LEN2009", 184 "LEN200A", 185 "LEN200B", 186 NULL 187 }; 188 189 /***************************************************************************** 190 * Synaptics communications functions 191 ****************************************************************************/ 192 193 /* 194 * Synaptics touchpads report the y coordinate from bottom to top, which is 195 * opposite from what userspace expects. 196 * This function is used to invert y before reporting. 197 */ 198 static int synaptics_invert_y(int y) 199 { 200 return YMAX_NOMINAL + YMIN_NOMINAL - y; 201 } 202 203 /* 204 * Send a command to the synpatics touchpad by special commands 205 */ 206 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param) 207 { 208 if (psmouse_sliced_command(psmouse, c)) 209 return -1; 210 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO)) 211 return -1; 212 return 0; 213 } 214 215 /* 216 * Read the model-id bytes from the touchpad 217 * see also SYN_MODEL_* macros 218 */ 219 static int synaptics_model_id(struct psmouse *psmouse) 220 { 221 struct synaptics_data *priv = psmouse->private; 222 unsigned char mi[3]; 223 224 if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi)) 225 return -1; 226 priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2]; 227 return 0; 228 } 229 230 /* 231 * Read the board id from the touchpad 232 * The board id is encoded in the "QUERY MODES" response 233 */ 234 static int synaptics_board_id(struct psmouse *psmouse) 235 { 236 struct synaptics_data *priv = psmouse->private; 237 unsigned char bid[3]; 238 239 if (synaptics_send_cmd(psmouse, SYN_QUE_MODES, bid)) 240 return -1; 241 priv->board_id = ((bid[0] & 0xfc) << 6) | bid[1]; 242 return 0; 243 } 244 245 /* 246 * Read the firmware id from the touchpad 247 */ 248 static int synaptics_firmware_id(struct psmouse *psmouse) 249 { 250 struct synaptics_data *priv = psmouse->private; 251 unsigned char fwid[3]; 252 253 if (synaptics_send_cmd(psmouse, SYN_QUE_FIRMWARE_ID, fwid)) 254 return -1; 255 priv->firmware_id = (fwid[0] << 16) | (fwid[1] << 8) | fwid[2]; 256 return 0; 257 } 258 259 /* 260 * Read the capability-bits from the touchpad 261 * see also the SYN_CAP_* macros 262 */ 263 static int synaptics_capability(struct psmouse *psmouse) 264 { 265 struct synaptics_data *priv = psmouse->private; 266 unsigned char cap[3]; 267 268 if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap)) 269 return -1; 270 priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2]; 271 priv->ext_cap = priv->ext_cap_0c = 0; 272 273 /* 274 * Older firmwares had submodel ID fixed to 0x47 275 */ 276 if (SYN_ID_FULL(priv->identity) < 0x705 && 277 SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) { 278 return -1; 279 } 280 281 /* 282 * Unless capExtended is set the rest of the flags should be ignored 283 */ 284 if (!SYN_CAP_EXTENDED(priv->capabilities)) 285 priv->capabilities = 0; 286 287 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) { 288 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) { 289 psmouse_warn(psmouse, 290 "device claims to have extended capabilities, but I'm not able to read them.\n"); 291 } else { 292 priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2]; 293 294 /* 295 * if nExtBtn is greater than 8 it should be considered 296 * invalid and treated as 0 297 */ 298 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8) 299 priv->ext_cap &= 0xff0fff; 300 } 301 } 302 303 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) { 304 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) { 305 psmouse_warn(psmouse, 306 "device claims to have extended capability 0x0c, but I'm not able to read it.\n"); 307 } else { 308 priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2]; 309 } 310 } 311 312 return 0; 313 } 314 315 /* 316 * Identify Touchpad 317 * See also the SYN_ID_* macros 318 */ 319 static int synaptics_identify(struct psmouse *psmouse) 320 { 321 struct synaptics_data *priv = psmouse->private; 322 unsigned char id[3]; 323 324 if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id)) 325 return -1; 326 priv->identity = (id[0]<<16) | (id[1]<<8) | id[2]; 327 if (SYN_ID_IS_SYNAPTICS(priv->identity)) 328 return 0; 329 return -1; 330 } 331 332 /* 333 * Read touchpad resolution and maximum reported coordinates 334 * Resolution is left zero if touchpad does not support the query 335 */ 336 337 static int synaptics_resolution(struct psmouse *psmouse) 338 { 339 struct synaptics_data *priv = psmouse->private; 340 unsigned char resp[3]; 341 int i; 342 343 if (SYN_ID_MAJOR(priv->identity) < 4) 344 return 0; 345 346 if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) { 347 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) { 348 priv->x_res = resp[0]; /* x resolution in units/mm */ 349 priv->y_res = resp[2]; /* y resolution in units/mm */ 350 } 351 } 352 353 for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) { 354 if (psmouse_matches_pnp_id(psmouse, 355 min_max_pnpid_table[i].pnp_ids)) { 356 priv->x_min = min_max_pnpid_table[i].x_min; 357 priv->x_max = min_max_pnpid_table[i].x_max; 358 priv->y_min = min_max_pnpid_table[i].y_min; 359 priv->y_max = min_max_pnpid_table[i].y_max; 360 return 0; 361 } 362 } 363 364 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 && 365 SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) { 366 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) { 367 psmouse_warn(psmouse, 368 "device claims to have max coordinates query, but I'm not able to read it.\n"); 369 } else { 370 priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 371 priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 372 } 373 } 374 375 if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 && 376 SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) { 377 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) { 378 psmouse_warn(psmouse, 379 "device claims to have min coordinates query, but I'm not able to read it.\n"); 380 } else { 381 priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1); 382 priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3); 383 } 384 } 385 386 return 0; 387 } 388 389 static int synaptics_query_hardware(struct psmouse *psmouse) 390 { 391 if (synaptics_identify(psmouse)) 392 return -1; 393 if (synaptics_model_id(psmouse)) 394 return -1; 395 if (synaptics_firmware_id(psmouse)) 396 return -1; 397 if (synaptics_board_id(psmouse)) 398 return -1; 399 if (synaptics_capability(psmouse)) 400 return -1; 401 if (synaptics_resolution(psmouse)) 402 return -1; 403 404 return 0; 405 } 406 407 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse) 408 { 409 static unsigned char param = 0xc8; 410 struct synaptics_data *priv = psmouse->private; 411 412 if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) || 413 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c))) 414 return 0; 415 416 if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL)) 417 return -1; 418 419 if (ps2_command(&psmouse->ps2dev, ¶m, PSMOUSE_CMD_SETRATE)) 420 return -1; 421 422 /* Advanced gesture mode also sends multi finger data */ 423 priv->capabilities |= BIT(1); 424 425 return 0; 426 } 427 428 static int synaptics_set_mode(struct psmouse *psmouse) 429 { 430 struct synaptics_data *priv = psmouse->private; 431 432 priv->mode = 0; 433 if (priv->absolute_mode) 434 priv->mode |= SYN_BIT_ABSOLUTE_MODE; 435 if (priv->disable_gesture) 436 priv->mode |= SYN_BIT_DISABLE_GESTURE; 437 if (psmouse->rate >= 80) 438 priv->mode |= SYN_BIT_HIGH_RATE; 439 if (SYN_CAP_EXTENDED(priv->capabilities)) 440 priv->mode |= SYN_BIT_W_MODE; 441 442 if (synaptics_mode_cmd(psmouse, priv->mode)) 443 return -1; 444 445 if (priv->absolute_mode && 446 synaptics_set_advanced_gesture_mode(psmouse)) { 447 psmouse_err(psmouse, "Advanced gesture mode init failed.\n"); 448 return -1; 449 } 450 451 return 0; 452 } 453 454 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate) 455 { 456 struct synaptics_data *priv = psmouse->private; 457 458 if (rate >= 80) { 459 priv->mode |= SYN_BIT_HIGH_RATE; 460 psmouse->rate = 80; 461 } else { 462 priv->mode &= ~SYN_BIT_HIGH_RATE; 463 psmouse->rate = 40; 464 } 465 466 synaptics_mode_cmd(psmouse, priv->mode); 467 } 468 469 /***************************************************************************** 470 * Synaptics pass-through PS/2 port support 471 ****************************************************************************/ 472 static int synaptics_pt_write(struct serio *serio, unsigned char c) 473 { 474 struct psmouse *parent = serio_get_drvdata(serio->parent); 475 char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */ 476 477 if (psmouse_sliced_command(parent, c)) 478 return -1; 479 if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE)) 480 return -1; 481 return 0; 482 } 483 484 static int synaptics_pt_start(struct serio *serio) 485 { 486 struct psmouse *parent = serio_get_drvdata(serio->parent); 487 struct synaptics_data *priv = parent->private; 488 489 serio_pause_rx(parent->ps2dev.serio); 490 priv->pt_port = serio; 491 serio_continue_rx(parent->ps2dev.serio); 492 493 return 0; 494 } 495 496 static void synaptics_pt_stop(struct serio *serio) 497 { 498 struct psmouse *parent = serio_get_drvdata(serio->parent); 499 struct synaptics_data *priv = parent->private; 500 501 serio_pause_rx(parent->ps2dev.serio); 502 priv->pt_port = NULL; 503 serio_continue_rx(parent->ps2dev.serio); 504 } 505 506 static int synaptics_is_pt_packet(unsigned char *buf) 507 { 508 return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4; 509 } 510 511 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet) 512 { 513 struct psmouse *child = serio_get_drvdata(ptport); 514 515 if (child && child->state == PSMOUSE_ACTIVATED) { 516 serio_interrupt(ptport, packet[1], 0); 517 serio_interrupt(ptport, packet[4], 0); 518 serio_interrupt(ptport, packet[5], 0); 519 if (child->pktsize == 4) 520 serio_interrupt(ptport, packet[2], 0); 521 } else 522 serio_interrupt(ptport, packet[1], 0); 523 } 524 525 static void synaptics_pt_activate(struct psmouse *psmouse) 526 { 527 struct synaptics_data *priv = psmouse->private; 528 struct psmouse *child = serio_get_drvdata(priv->pt_port); 529 530 /* adjust the touchpad to child's choice of protocol */ 531 if (child) { 532 if (child->pktsize == 4) 533 priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT; 534 else 535 priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT; 536 537 if (synaptics_mode_cmd(psmouse, priv->mode)) 538 psmouse_warn(psmouse, 539 "failed to switch guest protocol\n"); 540 } 541 } 542 543 static void synaptics_pt_create(struct psmouse *psmouse) 544 { 545 struct serio *serio; 546 547 serio = kzalloc(sizeof(struct serio), GFP_KERNEL); 548 if (!serio) { 549 psmouse_err(psmouse, 550 "not enough memory for pass-through port\n"); 551 return; 552 } 553 554 serio->id.type = SERIO_PS_PSTHRU; 555 strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name)); 556 strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name)); 557 serio->write = synaptics_pt_write; 558 serio->start = synaptics_pt_start; 559 serio->stop = synaptics_pt_stop; 560 serio->parent = psmouse->ps2dev.serio; 561 562 psmouse->pt_activate = synaptics_pt_activate; 563 564 psmouse_info(psmouse, "serio: %s port at %s\n", 565 serio->name, psmouse->phys); 566 serio_register_port(serio); 567 } 568 569 /***************************************************************************** 570 * Functions to interpret the absolute mode packets 571 ****************************************************************************/ 572 573 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count, 574 int sgm, int agm) 575 { 576 state->count = count; 577 state->sgm = sgm; 578 state->agm = agm; 579 } 580 581 static void synaptics_parse_agm(const unsigned char buf[], 582 struct synaptics_data *priv, 583 struct synaptics_hw_state *hw) 584 { 585 struct synaptics_hw_state *agm = &priv->agm; 586 int agm_packet_type; 587 588 agm_packet_type = (buf[5] & 0x30) >> 4; 589 switch (agm_packet_type) { 590 case 1: 591 /* Gesture packet: (x, y, z) half resolution */ 592 agm->w = hw->w; 593 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1; 594 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1; 595 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1; 596 break; 597 598 case 2: 599 /* AGM-CONTACT packet: (count, sgm, agm) */ 600 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]); 601 break; 602 603 default: 604 break; 605 } 606 607 /* Record that at least one AGM has been received since last SGM */ 608 priv->agm_pending = true; 609 } 610 611 static bool is_forcepad; 612 613 static int synaptics_parse_hw_state(const unsigned char buf[], 614 struct synaptics_data *priv, 615 struct synaptics_hw_state *hw) 616 { 617 memset(hw, 0, sizeof(struct synaptics_hw_state)); 618 619 if (SYN_MODEL_NEWABS(priv->model_id)) { 620 hw->w = (((buf[0] & 0x30) >> 2) | 621 ((buf[0] & 0x04) >> 1) | 622 ((buf[3] & 0x04) >> 2)); 623 624 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) || 625 SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) && 626 hw->w == 2) { 627 synaptics_parse_agm(buf, priv, hw); 628 return 1; 629 } 630 631 hw->x = (((buf[3] & 0x10) << 8) | 632 ((buf[1] & 0x0f) << 8) | 633 buf[4]); 634 hw->y = (((buf[3] & 0x20) << 7) | 635 ((buf[1] & 0xf0) << 4) | 636 buf[5]); 637 hw->z = buf[2]; 638 639 hw->left = (buf[0] & 0x01) ? 1 : 0; 640 hw->right = (buf[0] & 0x02) ? 1 : 0; 641 642 if (is_forcepad) { 643 /* 644 * ForcePads, like Clickpads, use middle button 645 * bits to report primary button clicks. 646 * Unfortunately they report primary button not 647 * only when user presses on the pad above certain 648 * threshold, but also when there are more than one 649 * finger on the touchpad, which interferes with 650 * out multi-finger gestures. 651 */ 652 if (hw->z == 0) { 653 /* No contacts */ 654 priv->press = priv->report_press = false; 655 } else if (hw->w >= 4 && ((buf[0] ^ buf[3]) & 0x01)) { 656 /* 657 * Single-finger touch with pressure above 658 * the threshold. If pressure stays long 659 * enough, we'll start reporting primary 660 * button. We rely on the device continuing 661 * sending data even if finger does not 662 * move. 663 */ 664 if (!priv->press) { 665 priv->press_start = jiffies; 666 priv->press = true; 667 } else if (time_after(jiffies, 668 priv->press_start + 669 msecs_to_jiffies(50))) { 670 priv->report_press = true; 671 } 672 } else { 673 priv->press = false; 674 } 675 676 hw->left = priv->report_press; 677 678 } else if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) { 679 /* 680 * Clickpad's button is transmitted as middle button, 681 * however, since it is primary button, we will report 682 * it as BTN_LEFT. 683 */ 684 hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 685 686 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) { 687 hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 688 if (hw->w == 2) 689 hw->scroll = (signed char)(buf[1]); 690 } 691 692 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) { 693 hw->up = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0; 694 hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0; 695 } 696 697 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) && 698 ((buf[0] ^ buf[3]) & 0x02)) { 699 switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) { 700 default: 701 /* 702 * if nExtBtn is greater than 8 it should be 703 * considered invalid and treated as 0 704 */ 705 break; 706 case 8: 707 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0; 708 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0; 709 case 6: 710 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0; 711 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0; 712 case 4: 713 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0; 714 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0; 715 case 2: 716 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0; 717 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0; 718 } 719 } 720 } else { 721 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]); 722 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]); 723 724 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F)); 725 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1)); 726 727 hw->left = (buf[0] & 0x01) ? 1 : 0; 728 hw->right = (buf[0] & 0x02) ? 1 : 0; 729 } 730 731 /* 732 * Convert wrap-around values to negative. (X|Y)_MAX_POSITIVE 733 * is used by some firmware to indicate a finger at the edge of 734 * the touchpad whose precise position cannot be determined, so 735 * convert these values to the maximum axis value. 736 */ 737 if (hw->x > X_MAX_POSITIVE) 738 hw->x -= 1 << ABS_POS_BITS; 739 else if (hw->x == X_MAX_POSITIVE) 740 hw->x = XMAX; 741 742 if (hw->y > Y_MAX_POSITIVE) 743 hw->y -= 1 << ABS_POS_BITS; 744 else if (hw->y == Y_MAX_POSITIVE) 745 hw->y = YMAX; 746 747 return 0; 748 } 749 750 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot, 751 bool active, int x, int y) 752 { 753 input_mt_slot(dev, slot); 754 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active); 755 if (active) { 756 input_report_abs(dev, ABS_MT_POSITION_X, x); 757 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y)); 758 } 759 } 760 761 static void synaptics_report_semi_mt_data(struct input_dev *dev, 762 const struct synaptics_hw_state *a, 763 const struct synaptics_hw_state *b, 764 int num_fingers) 765 { 766 if (num_fingers >= 2) { 767 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x), 768 min(a->y, b->y)); 769 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x), 770 max(a->y, b->y)); 771 } else if (num_fingers == 1) { 772 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y); 773 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 774 } else { 775 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0); 776 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0); 777 } 778 } 779 780 static void synaptics_report_buttons(struct psmouse *psmouse, 781 const struct synaptics_hw_state *hw) 782 { 783 struct input_dev *dev = psmouse->dev; 784 struct synaptics_data *priv = psmouse->private; 785 int i; 786 787 input_report_key(dev, BTN_LEFT, hw->left); 788 input_report_key(dev, BTN_RIGHT, hw->right); 789 790 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) 791 input_report_key(dev, BTN_MIDDLE, hw->middle); 792 793 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) { 794 input_report_key(dev, BTN_FORWARD, hw->up); 795 input_report_key(dev, BTN_BACK, hw->down); 796 } 797 798 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++) 799 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i)); 800 } 801 802 static void synaptics_report_slot(struct input_dev *dev, int slot, 803 const struct synaptics_hw_state *hw) 804 { 805 input_mt_slot(dev, slot); 806 input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL)); 807 if (!hw) 808 return; 809 810 input_report_abs(dev, ABS_MT_POSITION_X, hw->x); 811 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y)); 812 input_report_abs(dev, ABS_MT_PRESSURE, hw->z); 813 } 814 815 static void synaptics_report_mt_data(struct psmouse *psmouse, 816 struct synaptics_mt_state *mt_state, 817 const struct synaptics_hw_state *sgm) 818 { 819 struct input_dev *dev = psmouse->dev; 820 struct synaptics_data *priv = psmouse->private; 821 struct synaptics_hw_state *agm = &priv->agm; 822 struct synaptics_mt_state *old = &priv->mt_state; 823 824 switch (mt_state->count) { 825 case 0: 826 synaptics_report_slot(dev, 0, NULL); 827 synaptics_report_slot(dev, 1, NULL); 828 break; 829 case 1: 830 if (mt_state->sgm == -1) { 831 synaptics_report_slot(dev, 0, NULL); 832 synaptics_report_slot(dev, 1, NULL); 833 } else if (mt_state->sgm == 0) { 834 synaptics_report_slot(dev, 0, sgm); 835 synaptics_report_slot(dev, 1, NULL); 836 } else { 837 synaptics_report_slot(dev, 0, NULL); 838 synaptics_report_slot(dev, 1, sgm); 839 } 840 break; 841 default: 842 /* 843 * If the finger slot contained in SGM is valid, and either 844 * hasn't changed, or is new, or the old SGM has now moved to 845 * AGM, then report SGM in MTB slot 0. 846 * Otherwise, empty MTB slot 0. 847 */ 848 if (mt_state->sgm != -1 && 849 (mt_state->sgm == old->sgm || 850 old->sgm == -1 || mt_state->agm == old->sgm)) 851 synaptics_report_slot(dev, 0, sgm); 852 else 853 synaptics_report_slot(dev, 0, NULL); 854 855 /* 856 * If the finger slot contained in AGM is valid, and either 857 * hasn't changed, or is new, then report AGM in MTB slot 1. 858 * Otherwise, empty MTB slot 1. 859 * 860 * However, in the case where the AGM is new, make sure that 861 * that it is either the same as the old SGM, or there was no 862 * SGM. 863 * 864 * Otherwise, if the SGM was just 1, and the new AGM is 2, then 865 * the new AGM will keep the old SGM's tracking ID, which can 866 * cause apparent drumroll. This happens if in the following 867 * valid finger sequence: 868 * 869 * Action SGM AGM (MTB slot:Contact) 870 * 1. Touch contact 0 (0:0) 871 * 2. Touch contact 1 (0:0, 1:1) 872 * 3. Lift contact 0 (1:1) 873 * 4. Touch contacts 2,3 (0:2, 1:3) 874 * 875 * In step 4, contact 3, in AGM must not be given the same 876 * tracking ID as contact 1 had in step 3. To avoid this, 877 * the first agm with contact 3 is dropped and slot 1 is 878 * invalidated (tracking ID = -1). 879 */ 880 if (mt_state->agm != -1 && 881 (mt_state->agm == old->agm || 882 (old->agm == -1 && 883 (old->sgm == -1 || mt_state->agm == old->sgm)))) 884 synaptics_report_slot(dev, 1, agm); 885 else 886 synaptics_report_slot(dev, 1, NULL); 887 break; 888 } 889 890 /* Don't use active slot count to generate BTN_TOOL events. */ 891 input_mt_report_pointer_emulation(dev, false); 892 893 /* Send the number of fingers reported by touchpad itself. */ 894 input_mt_report_finger_count(dev, mt_state->count); 895 896 synaptics_report_buttons(psmouse, sgm); 897 898 input_sync(dev); 899 } 900 901 /* Handle case where mt_state->count = 0 */ 902 static void synaptics_image_sensor_0f(struct synaptics_data *priv, 903 struct synaptics_mt_state *mt_state) 904 { 905 synaptics_mt_state_set(mt_state, 0, -1, -1); 906 priv->mt_state_lost = false; 907 } 908 909 /* Handle case where mt_state->count = 1 */ 910 static void synaptics_image_sensor_1f(struct synaptics_data *priv, 911 struct synaptics_mt_state *mt_state) 912 { 913 struct synaptics_hw_state *agm = &priv->agm; 914 struct synaptics_mt_state *old = &priv->mt_state; 915 916 /* 917 * If the last AGM was (0,0,0), and there is only one finger left, 918 * then we absolutely know that SGM contains slot 0, and all other 919 * fingers have been removed. 920 */ 921 if (priv->agm_pending && agm->z == 0) { 922 synaptics_mt_state_set(mt_state, 1, 0, -1); 923 priv->mt_state_lost = false; 924 return; 925 } 926 927 switch (old->count) { 928 case 0: 929 synaptics_mt_state_set(mt_state, 1, 0, -1); 930 break; 931 case 1: 932 /* 933 * If mt_state_lost, then the previous transition was 3->1, 934 * and SGM now contains either slot 0 or 1, but we don't know 935 * which. So, we just assume that the SGM now contains slot 1. 936 * 937 * If pending AGM and either: 938 * (a) the previous SGM slot contains slot 0, or 939 * (b) there was no SGM slot 940 * then, the SGM now contains slot 1 941 * 942 * Case (a) happens with very rapid "drum roll" gestures, where 943 * slot 0 finger is lifted and a new slot 1 finger touches 944 * within one reporting interval. 945 * 946 * Case (b) happens if initially two or more fingers tap 947 * briefly, and all but one lift before the end of the first 948 * reporting interval. 949 * 950 * (In both these cases, slot 0 will becomes empty, so SGM 951 * contains slot 1 with the new finger) 952 * 953 * Else, if there was no previous SGM, it now contains slot 0. 954 * 955 * Otherwise, SGM still contains the same slot. 956 */ 957 if (priv->mt_state_lost || 958 (priv->agm_pending && old->sgm <= 0)) 959 synaptics_mt_state_set(mt_state, 1, 1, -1); 960 else if (old->sgm == -1) 961 synaptics_mt_state_set(mt_state, 1, 0, -1); 962 break; 963 case 2: 964 /* 965 * If mt_state_lost, we don't know which finger SGM contains. 966 * 967 * So, report 1 finger, but with both slots empty. 968 * We will use slot 1 on subsequent 1->1 969 */ 970 if (priv->mt_state_lost) { 971 synaptics_mt_state_set(mt_state, 1, -1, -1); 972 break; 973 } 974 /* 975 * Since the last AGM was NOT (0,0,0), it was the finger in 976 * slot 0 that has been removed. 977 * So, SGM now contains previous AGM's slot, and AGM is now 978 * empty. 979 */ 980 synaptics_mt_state_set(mt_state, 1, old->agm, -1); 981 break; 982 case 3: 983 /* 984 * Since last AGM was not (0,0,0), we don't know which finger 985 * is left. 986 * 987 * So, report 1 finger, but with both slots empty. 988 * We will use slot 1 on subsequent 1->1 989 */ 990 synaptics_mt_state_set(mt_state, 1, -1, -1); 991 priv->mt_state_lost = true; 992 break; 993 case 4: 994 case 5: 995 /* mt_state was updated by AGM-CONTACT packet */ 996 break; 997 } 998 } 999 1000 /* Handle case where mt_state->count = 2 */ 1001 static void synaptics_image_sensor_2f(struct synaptics_data *priv, 1002 struct synaptics_mt_state *mt_state) 1003 { 1004 struct synaptics_mt_state *old = &priv->mt_state; 1005 1006 switch (old->count) { 1007 case 0: 1008 synaptics_mt_state_set(mt_state, 2, 0, 1); 1009 break; 1010 case 1: 1011 /* 1012 * If previous SGM contained slot 1 or higher, SGM now contains 1013 * slot 0 (the newly touching finger) and AGM contains SGM's 1014 * previous slot. 1015 * 1016 * Otherwise, SGM still contains slot 0 and AGM now contains 1017 * slot 1. 1018 */ 1019 if (old->sgm >= 1) 1020 synaptics_mt_state_set(mt_state, 2, 0, old->sgm); 1021 else 1022 synaptics_mt_state_set(mt_state, 2, 0, 1); 1023 break; 1024 case 2: 1025 /* 1026 * If mt_state_lost, SGM now contains either finger 1 or 2, but 1027 * we don't know which. 1028 * So, we just assume that the SGM contains slot 0 and AGM 1. 1029 */ 1030 if (priv->mt_state_lost) 1031 synaptics_mt_state_set(mt_state, 2, 0, 1); 1032 /* 1033 * Otherwise, use the same mt_state, since it either hasn't 1034 * changed, or was updated by a recently received AGM-CONTACT 1035 * packet. 1036 */ 1037 break; 1038 case 3: 1039 /* 1040 * 3->2 transitions have two unsolvable problems: 1041 * 1) no indication is given which finger was removed 1042 * 2) no way to tell if agm packet was for finger 3 1043 * before 3->2, or finger 2 after 3->2. 1044 * 1045 * So, report 2 fingers, but empty all slots. 1046 * We will guess slots [0,1] on subsequent 2->2. 1047 */ 1048 synaptics_mt_state_set(mt_state, 2, -1, -1); 1049 priv->mt_state_lost = true; 1050 break; 1051 case 4: 1052 case 5: 1053 /* mt_state was updated by AGM-CONTACT packet */ 1054 break; 1055 } 1056 } 1057 1058 /* Handle case where mt_state->count = 3 */ 1059 static void synaptics_image_sensor_3f(struct synaptics_data *priv, 1060 struct synaptics_mt_state *mt_state) 1061 { 1062 struct synaptics_mt_state *old = &priv->mt_state; 1063 1064 switch (old->count) { 1065 case 0: 1066 synaptics_mt_state_set(mt_state, 3, 0, 2); 1067 break; 1068 case 1: 1069 /* 1070 * If previous SGM contained slot 2 or higher, SGM now contains 1071 * slot 0 (one of the newly touching fingers) and AGM contains 1072 * SGM's previous slot. 1073 * 1074 * Otherwise, SGM now contains slot 0 and AGM contains slot 2. 1075 */ 1076 if (old->sgm >= 2) 1077 synaptics_mt_state_set(mt_state, 3, 0, old->sgm); 1078 else 1079 synaptics_mt_state_set(mt_state, 3, 0, 2); 1080 break; 1081 case 2: 1082 /* 1083 * If the AGM previously contained slot 3 or higher, then the 1084 * newly touching finger is in the lowest available slot. 1085 * 1086 * If SGM was previously 1 or higher, then the new SGM is 1087 * now slot 0 (with a new finger), otherwise, the new finger 1088 * is now in a hidden slot between 0 and AGM's slot. 1089 * 1090 * In all such cases, the SGM now contains slot 0, and the AGM 1091 * continues to contain the same slot as before. 1092 */ 1093 if (old->agm >= 3) { 1094 synaptics_mt_state_set(mt_state, 3, 0, old->agm); 1095 break; 1096 } 1097 1098 /* 1099 * After some 3->1 and all 3->2 transitions, we lose track 1100 * of which slot is reported by SGM and AGM. 1101 * 1102 * For 2->3 in this state, report 3 fingers, but empty all 1103 * slots, and we will guess (0,2) on a subsequent 0->3. 1104 * 1105 * To userspace, the resulting transition will look like: 1106 * 2:[0,1] -> 3:[-1,-1] -> 3:[0,2] 1107 */ 1108 if (priv->mt_state_lost) { 1109 synaptics_mt_state_set(mt_state, 3, -1, -1); 1110 break; 1111 } 1112 1113 /* 1114 * If the (SGM,AGM) really previously contained slots (0, 1), 1115 * then we cannot know what slot was just reported by the AGM, 1116 * because the 2->3 transition can occur either before or after 1117 * the AGM packet. Thus, this most recent AGM could contain 1118 * either the same old slot 1 or the new slot 2. 1119 * Subsequent AGMs will be reporting slot 2. 1120 * 1121 * To userspace, the resulting transition will look like: 1122 * 2:[0,1] -> 3:[0,-1] -> 3:[0,2] 1123 */ 1124 synaptics_mt_state_set(mt_state, 3, 0, -1); 1125 break; 1126 case 3: 1127 /* 1128 * If, for whatever reason, the previous agm was invalid, 1129 * Assume SGM now contains slot 0, AGM now contains slot 2. 1130 */ 1131 if (old->agm <= 2) 1132 synaptics_mt_state_set(mt_state, 3, 0, 2); 1133 /* 1134 * mt_state either hasn't changed, or was updated by a recently 1135 * received AGM-CONTACT packet. 1136 */ 1137 break; 1138 1139 case 4: 1140 case 5: 1141 /* mt_state was updated by AGM-CONTACT packet */ 1142 break; 1143 } 1144 } 1145 1146 /* Handle case where mt_state->count = 4, or = 5 */ 1147 static void synaptics_image_sensor_45f(struct synaptics_data *priv, 1148 struct synaptics_mt_state *mt_state) 1149 { 1150 /* mt_state was updated correctly by AGM-CONTACT packet */ 1151 priv->mt_state_lost = false; 1152 } 1153 1154 static void synaptics_image_sensor_process(struct psmouse *psmouse, 1155 struct synaptics_hw_state *sgm) 1156 { 1157 struct synaptics_data *priv = psmouse->private; 1158 struct synaptics_hw_state *agm = &priv->agm; 1159 struct synaptics_mt_state mt_state; 1160 1161 /* Initialize using current mt_state (as updated by last agm) */ 1162 mt_state = agm->mt_state; 1163 1164 /* 1165 * Update mt_state using the new finger count and current mt_state. 1166 */ 1167 if (sgm->z == 0) 1168 synaptics_image_sensor_0f(priv, &mt_state); 1169 else if (sgm->w >= 4) 1170 synaptics_image_sensor_1f(priv, &mt_state); 1171 else if (sgm->w == 0) 1172 synaptics_image_sensor_2f(priv, &mt_state); 1173 else if (sgm->w == 1 && mt_state.count <= 3) 1174 synaptics_image_sensor_3f(priv, &mt_state); 1175 else 1176 synaptics_image_sensor_45f(priv, &mt_state); 1177 1178 /* Send resulting input events to user space */ 1179 synaptics_report_mt_data(psmouse, &mt_state, sgm); 1180 1181 /* Store updated mt_state */ 1182 priv->mt_state = agm->mt_state = mt_state; 1183 priv->agm_pending = false; 1184 } 1185 1186 static void synaptics_profile_sensor_process(struct psmouse *psmouse, 1187 struct synaptics_hw_state *sgm, 1188 int num_fingers) 1189 { 1190 struct input_dev *dev = psmouse->dev; 1191 struct synaptics_data *priv = psmouse->private; 1192 struct synaptics_hw_state *hw[2] = { sgm, &priv->agm }; 1193 struct input_mt_pos pos[2]; 1194 int slot[2], nsemi, i; 1195 1196 nsemi = clamp_val(num_fingers, 0, 2); 1197 1198 for (i = 0; i < nsemi; i++) { 1199 pos[i].x = hw[i]->x; 1200 pos[i].y = synaptics_invert_y(hw[i]->y); 1201 } 1202 1203 input_mt_assign_slots(dev, slot, pos, nsemi); 1204 1205 for (i = 0; i < nsemi; i++) { 1206 input_mt_slot(dev, slot[i]); 1207 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 1208 input_report_abs(dev, ABS_MT_POSITION_X, pos[i].x); 1209 input_report_abs(dev, ABS_MT_POSITION_Y, pos[i].y); 1210 input_report_abs(dev, ABS_MT_PRESSURE, hw[i]->z); 1211 } 1212 1213 input_mt_drop_unused(dev); 1214 input_mt_report_pointer_emulation(dev, false); 1215 input_mt_report_finger_count(dev, num_fingers); 1216 1217 synaptics_report_buttons(psmouse, sgm); 1218 1219 input_sync(dev); 1220 } 1221 1222 /* 1223 * called for each full received packet from the touchpad 1224 */ 1225 static void synaptics_process_packet(struct psmouse *psmouse) 1226 { 1227 struct input_dev *dev = psmouse->dev; 1228 struct synaptics_data *priv = psmouse->private; 1229 struct synaptics_hw_state hw; 1230 int num_fingers; 1231 int finger_width; 1232 1233 if (synaptics_parse_hw_state(psmouse->packet, priv, &hw)) 1234 return; 1235 1236 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) { 1237 synaptics_image_sensor_process(psmouse, &hw); 1238 return; 1239 } 1240 1241 if (hw.scroll) { 1242 priv->scroll += hw.scroll; 1243 1244 while (priv->scroll >= 4) { 1245 input_report_key(dev, BTN_BACK, !hw.down); 1246 input_sync(dev); 1247 input_report_key(dev, BTN_BACK, hw.down); 1248 input_sync(dev); 1249 priv->scroll -= 4; 1250 } 1251 while (priv->scroll <= -4) { 1252 input_report_key(dev, BTN_FORWARD, !hw.up); 1253 input_sync(dev); 1254 input_report_key(dev, BTN_FORWARD, hw.up); 1255 input_sync(dev); 1256 priv->scroll += 4; 1257 } 1258 return; 1259 } 1260 1261 if (hw.z > 0 && hw.x > 1) { 1262 num_fingers = 1; 1263 finger_width = 5; 1264 if (SYN_CAP_EXTENDED(priv->capabilities)) { 1265 switch (hw.w) { 1266 case 0 ... 1: 1267 if (SYN_CAP_MULTIFINGER(priv->capabilities)) 1268 num_fingers = hw.w + 2; 1269 break; 1270 case 2: 1271 if (SYN_MODEL_PEN(priv->model_id)) 1272 ; /* Nothing, treat a pen as a single finger */ 1273 break; 1274 case 4 ... 15: 1275 if (SYN_CAP_PALMDETECT(priv->capabilities)) 1276 finger_width = hw.w; 1277 break; 1278 } 1279 } 1280 } else { 1281 num_fingers = 0; 1282 finger_width = 0; 1283 } 1284 1285 if (cr48_profile_sensor) { 1286 synaptics_profile_sensor_process(psmouse, &hw, num_fingers); 1287 return; 1288 } 1289 1290 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) 1291 synaptics_report_semi_mt_data(dev, &hw, &priv->agm, 1292 num_fingers); 1293 1294 /* Post events 1295 * BTN_TOUCH has to be first as mousedev relies on it when doing 1296 * absolute -> relative conversion 1297 */ 1298 if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1); 1299 if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0); 1300 1301 if (num_fingers > 0) { 1302 input_report_abs(dev, ABS_X, hw.x); 1303 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y)); 1304 } 1305 input_report_abs(dev, ABS_PRESSURE, hw.z); 1306 1307 if (SYN_CAP_PALMDETECT(priv->capabilities)) 1308 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width); 1309 1310 input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1); 1311 if (SYN_CAP_MULTIFINGER(priv->capabilities)) { 1312 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); 1313 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); 1314 } 1315 1316 synaptics_report_buttons(psmouse, &hw); 1317 1318 input_sync(dev); 1319 } 1320 1321 static int synaptics_validate_byte(struct psmouse *psmouse, 1322 int idx, unsigned char pkt_type) 1323 { 1324 static const unsigned char newabs_mask[] = { 0xC8, 0x00, 0x00, 0xC8, 0x00 }; 1325 static const unsigned char newabs_rel_mask[] = { 0xC0, 0x00, 0x00, 0xC0, 0x00 }; 1326 static const unsigned char newabs_rslt[] = { 0x80, 0x00, 0x00, 0xC0, 0x00 }; 1327 static const unsigned char oldabs_mask[] = { 0xC0, 0x60, 0x00, 0xC0, 0x60 }; 1328 static const unsigned char oldabs_rslt[] = { 0xC0, 0x00, 0x00, 0x80, 0x00 }; 1329 const char *packet = psmouse->packet; 1330 1331 if (idx < 0 || idx > 4) 1332 return 0; 1333 1334 switch (pkt_type) { 1335 1336 case SYN_NEWABS: 1337 case SYN_NEWABS_RELAXED: 1338 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx]; 1339 1340 case SYN_NEWABS_STRICT: 1341 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx]; 1342 1343 case SYN_OLDABS: 1344 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx]; 1345 1346 default: 1347 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type); 1348 return 0; 1349 } 1350 } 1351 1352 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse) 1353 { 1354 int i; 1355 1356 for (i = 0; i < 5; i++) 1357 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) { 1358 psmouse_info(psmouse, "using relaxed packet validation\n"); 1359 return SYN_NEWABS_RELAXED; 1360 } 1361 1362 return SYN_NEWABS_STRICT; 1363 } 1364 1365 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) 1366 { 1367 struct synaptics_data *priv = psmouse->private; 1368 1369 if (psmouse->pktcnt >= 6) { /* Full packet received */ 1370 if (unlikely(priv->pkt_type == SYN_NEWABS)) 1371 priv->pkt_type = synaptics_detect_pkt_type(psmouse); 1372 1373 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && 1374 synaptics_is_pt_packet(psmouse->packet)) { 1375 if (priv->pt_port) 1376 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet); 1377 } else 1378 synaptics_process_packet(psmouse); 1379 1380 return PSMOUSE_FULL_PACKET; 1381 } 1382 1383 return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ? 1384 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA; 1385 } 1386 1387 /***************************************************************************** 1388 * Driver initialization/cleanup functions 1389 ****************************************************************************/ 1390 static void set_abs_position_params(struct input_dev *dev, 1391 struct synaptics_data *priv, int x_code, 1392 int y_code) 1393 { 1394 int x_min = priv->x_min ?: XMIN_NOMINAL; 1395 int x_max = priv->x_max ?: XMAX_NOMINAL; 1396 int y_min = priv->y_min ?: YMIN_NOMINAL; 1397 int y_max = priv->y_max ?: YMAX_NOMINAL; 1398 int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ? 1399 SYN_REDUCED_FILTER_FUZZ : 0; 1400 1401 input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0); 1402 input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0); 1403 input_abs_set_res(dev, x_code, priv->x_res); 1404 input_abs_set_res(dev, y_code, priv->y_res); 1405 } 1406 1407 static void set_input_params(struct psmouse *psmouse, 1408 struct synaptics_data *priv) 1409 { 1410 struct input_dev *dev = psmouse->dev; 1411 int i; 1412 1413 /* Things that apply to both modes */ 1414 __set_bit(INPUT_PROP_POINTER, dev->propbit); 1415 __set_bit(EV_KEY, dev->evbit); 1416 __set_bit(BTN_LEFT, dev->keybit); 1417 __set_bit(BTN_RIGHT, dev->keybit); 1418 1419 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) 1420 __set_bit(BTN_MIDDLE, dev->keybit); 1421 1422 if (!priv->absolute_mode) { 1423 /* Relative mode */ 1424 __set_bit(EV_REL, dev->evbit); 1425 __set_bit(REL_X, dev->relbit); 1426 __set_bit(REL_Y, dev->relbit); 1427 return; 1428 } 1429 1430 /* Absolute mode */ 1431 __set_bit(EV_ABS, dev->evbit); 1432 set_abs_position_params(dev, priv, ABS_X, ABS_Y); 1433 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); 1434 1435 if (cr48_profile_sensor) 1436 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1437 1438 if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) { 1439 set_abs_position_params(dev, priv, ABS_MT_POSITION_X, 1440 ABS_MT_POSITION_Y); 1441 /* Image sensors can report per-contact pressure */ 1442 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0); 1443 input_mt_init_slots(dev, 2, INPUT_MT_POINTER); 1444 1445 /* Image sensors can signal 4 and 5 finger clicks */ 1446 __set_bit(BTN_TOOL_QUADTAP, dev->keybit); 1447 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit); 1448 } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) { 1449 set_abs_position_params(dev, priv, ABS_MT_POSITION_X, 1450 ABS_MT_POSITION_Y); 1451 /* 1452 * Profile sensor in CR-48 tracks contacts reasonably well, 1453 * other non-image sensors with AGM use semi-mt. 1454 */ 1455 input_mt_init_slots(dev, 2, 1456 INPUT_MT_POINTER | 1457 (cr48_profile_sensor ? 1458 INPUT_MT_TRACK : INPUT_MT_SEMI_MT)); 1459 } 1460 1461 if (SYN_CAP_PALMDETECT(priv->capabilities)) 1462 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); 1463 1464 __set_bit(BTN_TOUCH, dev->keybit); 1465 __set_bit(BTN_TOOL_FINGER, dev->keybit); 1466 1467 if (SYN_CAP_MULTIFINGER(priv->capabilities)) { 1468 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit); 1469 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit); 1470 } 1471 1472 if (SYN_CAP_FOUR_BUTTON(priv->capabilities) || 1473 SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) { 1474 __set_bit(BTN_FORWARD, dev->keybit); 1475 __set_bit(BTN_BACK, dev->keybit); 1476 } 1477 1478 for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++) 1479 __set_bit(BTN_0 + i, dev->keybit); 1480 1481 __clear_bit(EV_REL, dev->evbit); 1482 __clear_bit(REL_X, dev->relbit); 1483 __clear_bit(REL_Y, dev->relbit); 1484 1485 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) { 1486 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit); 1487 if (psmouse_matches_pnp_id(psmouse, topbuttonpad_pnp_ids)) 1488 __set_bit(INPUT_PROP_TOPBUTTONPAD, dev->propbit); 1489 /* Clickpads report only left button */ 1490 __clear_bit(BTN_RIGHT, dev->keybit); 1491 __clear_bit(BTN_MIDDLE, dev->keybit); 1492 } 1493 } 1494 1495 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse, 1496 void *data, char *buf) 1497 { 1498 struct synaptics_data *priv = psmouse->private; 1499 1500 return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0'); 1501 } 1502 1503 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse, 1504 void *data, const char *buf, 1505 size_t len) 1506 { 1507 struct synaptics_data *priv = psmouse->private; 1508 unsigned int value; 1509 int err; 1510 1511 err = kstrtouint(buf, 10, &value); 1512 if (err) 1513 return err; 1514 1515 if (value > 1) 1516 return -EINVAL; 1517 1518 if (value == priv->disable_gesture) 1519 return len; 1520 1521 priv->disable_gesture = value; 1522 if (value) 1523 priv->mode |= SYN_BIT_DISABLE_GESTURE; 1524 else 1525 priv->mode &= ~SYN_BIT_DISABLE_GESTURE; 1526 1527 if (synaptics_mode_cmd(psmouse, priv->mode)) 1528 return -EIO; 1529 1530 return len; 1531 } 1532 1533 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL, 1534 synaptics_show_disable_gesture, 1535 synaptics_set_disable_gesture); 1536 1537 static void synaptics_disconnect(struct psmouse *psmouse) 1538 { 1539 struct synaptics_data *priv = psmouse->private; 1540 1541 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) 1542 device_remove_file(&psmouse->ps2dev.serio->dev, 1543 &psmouse_attr_disable_gesture.dattr); 1544 1545 synaptics_reset(psmouse); 1546 kfree(priv); 1547 psmouse->private = NULL; 1548 } 1549 1550 static int synaptics_reconnect(struct psmouse *psmouse) 1551 { 1552 struct synaptics_data *priv = psmouse->private; 1553 struct synaptics_data old_priv = *priv; 1554 unsigned char param[2]; 1555 int retry = 0; 1556 int error; 1557 1558 do { 1559 psmouse_reset(psmouse); 1560 if (retry) { 1561 /* 1562 * On some boxes, right after resuming, the touchpad 1563 * needs some time to finish initializing (I assume 1564 * it needs time to calibrate) and start responding 1565 * to Synaptics-specific queries, so let's wait a 1566 * bit. 1567 */ 1568 ssleep(1); 1569 } 1570 ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETID); 1571 error = synaptics_detect(psmouse, 0); 1572 } while (error && ++retry < 3); 1573 1574 if (error) 1575 return -1; 1576 1577 if (retry > 1) 1578 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry); 1579 1580 if (synaptics_query_hardware(psmouse)) { 1581 psmouse_err(psmouse, "Unable to query device.\n"); 1582 return -1; 1583 } 1584 1585 if (synaptics_set_mode(psmouse)) { 1586 psmouse_err(psmouse, "Unable to initialize device.\n"); 1587 return -1; 1588 } 1589 1590 if (old_priv.identity != priv->identity || 1591 old_priv.model_id != priv->model_id || 1592 old_priv.capabilities != priv->capabilities || 1593 old_priv.ext_cap != priv->ext_cap) { 1594 psmouse_err(psmouse, 1595 "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n", 1596 old_priv.identity, priv->identity, 1597 old_priv.model_id, priv->model_id, 1598 old_priv.capabilities, priv->capabilities, 1599 old_priv.ext_cap, priv->ext_cap); 1600 return -1; 1601 } 1602 1603 return 0; 1604 } 1605 1606 static bool impaired_toshiba_kbc; 1607 1608 static const struct dmi_system_id toshiba_dmi_table[] __initconst = { 1609 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1610 { 1611 /* Toshiba Satellite */ 1612 .matches = { 1613 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1614 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), 1615 }, 1616 }, 1617 { 1618 /* Toshiba Dynabook */ 1619 .matches = { 1620 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1621 DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"), 1622 }, 1623 }, 1624 { 1625 /* Toshiba Portege M300 */ 1626 .matches = { 1627 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1628 DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"), 1629 }, 1630 1631 }, 1632 { 1633 /* Toshiba Portege M300 */ 1634 .matches = { 1635 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), 1636 DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"), 1637 DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"), 1638 }, 1639 1640 }, 1641 #endif 1642 { } 1643 }; 1644 1645 static bool broken_olpc_ec; 1646 1647 static const struct dmi_system_id olpc_dmi_table[] __initconst = { 1648 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC) 1649 { 1650 /* OLPC XO-1 or XO-1.5 */ 1651 .matches = { 1652 DMI_MATCH(DMI_SYS_VENDOR, "OLPC"), 1653 DMI_MATCH(DMI_PRODUCT_NAME, "XO"), 1654 }, 1655 }, 1656 #endif 1657 { } 1658 }; 1659 1660 static const struct dmi_system_id __initconst cr48_dmi_table[] = { 1661 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1662 { 1663 /* Cr-48 Chromebook (Codename Mario) */ 1664 .matches = { 1665 DMI_MATCH(DMI_SYS_VENDOR, "IEC"), 1666 DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), 1667 }, 1668 }, 1669 #endif 1670 { } 1671 }; 1672 1673 static const struct dmi_system_id forcepad_dmi_table[] __initconst = { 1674 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 1675 { 1676 .matches = { 1677 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), 1678 DMI_MATCH(DMI_PRODUCT_NAME, "HP EliteBook Folio 1040 G1"), 1679 }, 1680 }, 1681 #endif 1682 { } 1683 }; 1684 1685 void __init synaptics_module_init(void) 1686 { 1687 impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table); 1688 broken_olpc_ec = dmi_check_system(olpc_dmi_table); 1689 cr48_profile_sensor = dmi_check_system(cr48_dmi_table); 1690 1691 /* 1692 * Unfortunately ForcePad capability is not exported over PS/2, 1693 * so we have to resort to checking DMI. 1694 */ 1695 is_forcepad = dmi_check_system(forcepad_dmi_table); 1696 } 1697 1698 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode) 1699 { 1700 struct synaptics_data *priv; 1701 int err = -1; 1702 1703 /* 1704 * The OLPC XO has issues with Synaptics' absolute mode; the constant 1705 * packet spew overloads the EC such that key presses on the keyboard 1706 * are missed. Given that, don't even attempt to use Absolute mode. 1707 * Relative mode seems to work just fine. 1708 */ 1709 if (absolute_mode && broken_olpc_ec) { 1710 psmouse_info(psmouse, 1711 "OLPC XO detected, not enabling Synaptics protocol.\n"); 1712 return -ENODEV; 1713 } 1714 1715 psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL); 1716 if (!priv) 1717 return -ENOMEM; 1718 1719 psmouse_reset(psmouse); 1720 1721 if (synaptics_query_hardware(psmouse)) { 1722 psmouse_err(psmouse, "Unable to query device.\n"); 1723 goto init_fail; 1724 } 1725 1726 priv->absolute_mode = absolute_mode; 1727 if (SYN_ID_DISGEST_SUPPORTED(priv->identity)) 1728 priv->disable_gesture = true; 1729 1730 if (synaptics_set_mode(psmouse)) { 1731 psmouse_err(psmouse, "Unable to initialize device.\n"); 1732 goto init_fail; 1733 } 1734 1735 priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS; 1736 1737 psmouse_info(psmouse, 1738 "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx, board id: %lu, fw id: %lu\n", 1739 SYN_ID_MODEL(priv->identity), 1740 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity), 1741 priv->model_id, 1742 priv->capabilities, priv->ext_cap, priv->ext_cap_0c, 1743 priv->board_id, priv->firmware_id); 1744 1745 set_input_params(psmouse, priv); 1746 1747 /* 1748 * Encode touchpad model so that it can be used to set 1749 * input device->id.version and be visible to userspace. 1750 * Because version is __u16 we have to drop something. 1751 * Hardware info bits seem to be good candidates as they 1752 * are documented to be for Synaptics corp. internal use. 1753 */ 1754 psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) | 1755 (priv->model_id & 0x000000ff); 1756 1757 if (absolute_mode) { 1758 psmouse->protocol_handler = synaptics_process_byte; 1759 psmouse->pktsize = 6; 1760 } else { 1761 /* Relative mode follows standard PS/2 mouse protocol */ 1762 psmouse->protocol_handler = psmouse_process_byte; 1763 psmouse->pktsize = 3; 1764 } 1765 1766 psmouse->set_rate = synaptics_set_rate; 1767 psmouse->disconnect = synaptics_disconnect; 1768 psmouse->reconnect = synaptics_reconnect; 1769 psmouse->cleanup = synaptics_reset; 1770 /* Synaptics can usually stay in sync without extra help */ 1771 psmouse->resync_time = 0; 1772 1773 if (SYN_CAP_PASS_THROUGH(priv->capabilities)) 1774 synaptics_pt_create(psmouse); 1775 1776 /* 1777 * Toshiba's KBC seems to have trouble handling data from 1778 * Synaptics at full rate. Switch to a lower rate (roughly 1779 * the same rate as a standard PS/2 mouse). 1780 */ 1781 if (psmouse->rate >= 80 && impaired_toshiba_kbc) { 1782 psmouse_info(psmouse, 1783 "Toshiba %s detected, limiting rate to 40pps.\n", 1784 dmi_get_system_info(DMI_PRODUCT_NAME)); 1785 psmouse->rate = 40; 1786 } 1787 1788 if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) { 1789 err = device_create_file(&psmouse->ps2dev.serio->dev, 1790 &psmouse_attr_disable_gesture.dattr); 1791 if (err) { 1792 psmouse_err(psmouse, 1793 "Failed to create disable_gesture attribute (%d)", 1794 err); 1795 goto init_fail; 1796 } 1797 } 1798 1799 return 0; 1800 1801 init_fail: 1802 kfree(priv); 1803 return err; 1804 } 1805 1806 int synaptics_init(struct psmouse *psmouse) 1807 { 1808 return __synaptics_init(psmouse, true); 1809 } 1810 1811 int synaptics_init_relative(struct psmouse *psmouse) 1812 { 1813 return __synaptics_init(psmouse, false); 1814 } 1815 1816 bool synaptics_supported(void) 1817 { 1818 return true; 1819 } 1820 1821 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1822 1823 void __init synaptics_module_init(void) 1824 { 1825 } 1826 1827 int synaptics_init(struct psmouse *psmouse) 1828 { 1829 return -ENOSYS; 1830 } 1831 1832 bool synaptics_supported(void) 1833 { 1834 return false; 1835 } 1836 1837 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ 1838