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