drivers/input/mouse/synaptics.c

   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/leds.h>
  33 #include <linux/slab.h>
  34 #include "psmouse.h"
  35 #include "synaptics.h"
  36
  37 /*
  38  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  39  * section 2.3.2, which says that they should be valid regardless of the
  40  * actual size of the sensor.
  41  * Note that newer firmware allows querying device for maximum useable
  42  * coordinates.
  43  */
  44 #define XMIN_NOMINAL 1472
  45 #define XMAX_NOMINAL 5472
  46 #define YMIN_NOMINAL 1408
  47 #define YMAX_NOMINAL 4448
  48
  49 /*
  50  * Synaptics touchpads report the y coordinate from bottom to top, which is
  51  * opposite from what userspace expects.
  52  * This function is used to invert y before reporting.
  53  */
  54 static int synaptics_invert_y(int y)
  55 {
  56         return YMAX_NOMINAL + YMIN_NOMINAL - y;
  57 }
  58
  59
  60 /*****************************************************************************
  61  *      Stuff we need even when we do not want native Synaptics support
  62  ****************************************************************************/
  63
  64 /*
  65  * Set the synaptics touchpad mode byte by special commands
  66  */
  67 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  68 {
  69         unsigned char param[1];
  70
  71         if (psmouse_sliced_command(psmouse, mode))
  72                 return -1;
  73         param[0] = SYN_PS_SET_MODE2;
  74         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  75                 return -1;
  76         return 0;
  77 }
  78
  79 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  80 {
  81         struct ps2dev *ps2dev = &psmouse->ps2dev;
  82         unsigned char param[4];
  83
  84         param[0] = 0;
  85
  86         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  87         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  88         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  89         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  90         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
  91
  92         if (param[1] != 0x47)
  93                 return -ENODEV;
  94
  95         if (set_properties) {
  96                 psmouse->vendor = "Synaptics";
  97                 psmouse->name = "TouchPad";
  98         }
  99
 100         return 0;
 101 }
 102
 103 void synaptics_reset(struct psmouse *psmouse)
 104 {
 105         /* reset touchpad back to relative mode, gestures enabled */
 106         synaptics_mode_cmd(psmouse, 0);
 107 }
 108
 109 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 110
 111 /*****************************************************************************
 112  *      Synaptics communications functions
 113  ****************************************************************************/
 114
 115 /*
 116  * Send a command to the synpatics touchpad by special commands
 117  */
 118 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 119 {
 120         if (psmouse_sliced_command(psmouse, c))
 121                 return -1;
 122         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 123                 return -1;
 124         return 0;
 125 }
 126
 127 /*
 128  * Read the model-id bytes from the touchpad
 129  * see also SYN_MODEL_* macros
 130  */
 131 static int synaptics_model_id(struct psmouse *psmouse)
 132 {
 133         struct synaptics_data *priv = psmouse->private;
 134         unsigned char mi[3];
 135
 136         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 137                 return -1;
 138         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 139         return 0;
 140 }
 141
 142 /*
 143  * Read the capability-bits from the touchpad
 144  * see also the SYN_CAP_* macros
 145  */
 146 static int synaptics_capability(struct psmouse *psmouse)
 147 {
 148         struct synaptics_data *priv = psmouse->private;
 149         unsigned char cap[3];
 150
 151         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 152                 return -1;
 153         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 154         priv->ext_cap = priv->ext_cap_0c = 0;
 155
 156         /*
 157          * Older firmwares had submodel ID fixed to 0x47
 158          */
 159         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 160             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 161                 return -1;
 162         }
 163
 164         /*
 165          * Unless capExtended is set the rest of the flags should be ignored
 166          */
 167         if (!SYN_CAP_EXTENDED(priv->capabilities))
 168                 priv->capabilities = 0;
 169
 170         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 171                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 172                         psmouse_warn(psmouse,
 173                                      "device claims to have extended capabilities, but I'm not able to read them.\n");
 174                 } else {
 175                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 176
 177                         /*
 178                          * if nExtBtn is greater than 8 it should be considered
 179                          * invalid and treated as 0
 180                          */
 181                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 182                                 priv->ext_cap &= 0xff0fff;
 183                 }
 184         }
 185
 186         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 187                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 188                         psmouse_warn(psmouse,
 189                                      "device claims to have extended capability 0x0c, but I'm not able to read it.\n");
 190                 } else {
 191                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 192                 }
 193         }
 194
 195         return 0;
 196 }
 197
 198 /*
 199  * Identify Touchpad
 200  * See also the SYN_ID_* macros
 201  */
 202 static int synaptics_identify(struct psmouse *psmouse)
 203 {
 204         struct synaptics_data *priv = psmouse->private;
 205         unsigned char id[3];
 206
 207         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 208                 return -1;
 209         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 210         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 211                 return 0;
 212         return -1;
 213 }
 214
 215 /*
 216  * Read touchpad resolution and maximum reported coordinates
 217  * Resolution is left zero if touchpad does not support the query
 218  */
 219 static int synaptics_resolution(struct psmouse *psmouse)
 220 {
 221         struct synaptics_data *priv = psmouse->private;
 222         unsigned char resp[3];
 223
 224         if (SYN_ID_MAJOR(priv->identity) < 4)
 225                 return 0;
 226
 227         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 228                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 229                         priv->x_res = resp[0]; /* x resolution in units/mm */
 230                         priv->y_res = resp[2]; /* y resolution in units/mm */
 231                 }
 232         }
 233
 234         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 235             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 236                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 237                         psmouse_warn(psmouse,
 238                                      "device claims to have max coordinates query, but I'm not able to read it.\n");
 239                 } else {
 240                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 241                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 242                 }
 243         }
 244
 245         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 246             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 247                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 248                         psmouse_warn(psmouse,
 249                                      "device claims to have min coordinates query, but I'm not able to read it.\n");
 250                 } else {
 251                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 252                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 253                 }
 254         }
 255
 256         return 0;
 257 }
 258
 259 static int synaptics_query_hardware(struct psmouse *psmouse)
 260 {
 261         if (synaptics_identify(psmouse))
 262                 return -1;
 263         if (synaptics_model_id(psmouse))
 264                 return -1;
 265         if (synaptics_capability(psmouse))
 266                 return -1;
 267         if (synaptics_resolution(psmouse))
 268                 return -1;
 269
 270         return 0;
 271 }
 272
 273 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 274 {
 275         static unsigned char param = 0xc8;
 276         struct synaptics_data *priv = psmouse->private;
 277
 278         if (!(SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 279               SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)))
 280                 return 0;
 281
 282         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 283                 return -1;
 284
 285         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 286                 return -1;
 287
 288         /* Advanced gesture mode also sends multi finger data */
 289         priv->capabilities |= BIT(1);
 290
 291         return 0;
 292 }
 293
 294 static int synaptics_set_mode(struct psmouse *psmouse)
 295 {
 296         struct synaptics_data *priv = psmouse->private;
 297
 298         priv->mode = 0;
 299         if (priv->absolute_mode)
 300                 priv->mode |= SYN_BIT_ABSOLUTE_MODE;
 301         if (priv->disable_gesture)
 302                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 303         if (psmouse->rate >= 80)
 304                 priv->mode |= SYN_BIT_HIGH_RATE;
 305         if (SYN_CAP_EXTENDED(priv->capabilities))
 306                 priv->mode |= SYN_BIT_W_MODE;
 307
 308         if (synaptics_mode_cmd(psmouse, priv->mode))
 309                 return -1;
 310
 311         if (priv->absolute_mode &&
 312             synaptics_set_advanced_gesture_mode(psmouse)) {
 313                 psmouse_err(psmouse, "Advanced gesture mode init failed.\n");
 314                 return -1;
 315         }
 316
 317         return 0;
 318 }
 319
 320 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 321 {
 322         struct synaptics_data *priv = psmouse->private;
 323
 324         if (rate >= 80) {
 325                 priv->mode |= SYN_BIT_HIGH_RATE;
 326                 psmouse->rate = 80;
 327         } else {
 328                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 329                 psmouse->rate = 40;
 330         }
 331
 332         synaptics_mode_cmd(psmouse, priv->mode);
 333 }
 334
 335 /*****************************************************************************
 336  *      Synaptics pass-through PS/2 port support
 337  ****************************************************************************/
 338 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 339 {
 340         struct psmouse *parent = serio_get_drvdata(serio->parent);
 341         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 342
 343         if (psmouse_sliced_command(parent, c))
 344                 return -1;
 345         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 346                 return -1;
 347         return 0;
 348 }
 349
 350 static int synaptics_pt_start(struct serio *serio)
 351 {
 352         struct psmouse *parent = serio_get_drvdata(serio->parent);
 353         struct synaptics_data *priv = parent->private;
 354
 355         serio_pause_rx(parent->ps2dev.serio);
 356         priv->pt_port = serio;
 357         serio_continue_rx(parent->ps2dev.serio);
 358
 359         return 0;
 360 }
 361
 362 static void synaptics_pt_stop(struct serio *serio)
 363 {
 364         struct psmouse *parent = serio_get_drvdata(serio->parent);
 365         struct synaptics_data *priv = parent->private;
 366
 367         serio_pause_rx(parent->ps2dev.serio);
 368         priv->pt_port = NULL;
 369         serio_continue_rx(parent->ps2dev.serio);
 370 }
 371
 372 static int synaptics_is_pt_packet(unsigned char *buf)
 373 {
 374         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 375 }
 376
 377 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 378 {
 379         struct psmouse *child = serio_get_drvdata(ptport);
 380
 381         if (child && child->state == PSMOUSE_ACTIVATED) {
 382                 serio_interrupt(ptport, packet[1], 0);
 383                 serio_interrupt(ptport, packet[4], 0);
 384                 serio_interrupt(ptport, packet[5], 0);
 385                 if (child->pktsize == 4)
 386                         serio_interrupt(ptport, packet[2], 0);
 387         } else
 388                 serio_interrupt(ptport, packet[1], 0);
 389 }
 390
 391 static void synaptics_pt_activate(struct psmouse *psmouse)
 392 {
 393         struct synaptics_data *priv = psmouse->private;
 394         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 395
 396         /* adjust the touchpad to child's choice of protocol */
 397         if (child) {
 398                 if (child->pktsize == 4)
 399                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 400                 else
 401                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 402
 403                 if (synaptics_mode_cmd(psmouse, priv->mode))
 404                         psmouse_warn(psmouse,
 405                                      "failed to switch guest protocol\n");
 406         }
 407 }
 408
 409 static void synaptics_pt_create(struct psmouse *psmouse)
 410 {
 411         struct serio *serio;
 412
 413         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 414         if (!serio) {
 415                 psmouse_err(psmouse,
 416                             "not enough memory for pass-through port\n");
 417                 return;
 418         }
 419
 420         serio->id.type = SERIO_PS_PSTHRU;
 421         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 422         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 423         serio->write = synaptics_pt_write;
 424         serio->start = synaptics_pt_start;
 425         serio->stop = synaptics_pt_stop;
 426         serio->parent = psmouse->ps2dev.serio;
 427
 428         psmouse->pt_activate = synaptics_pt_activate;
 429
 430         psmouse_info(psmouse, "serio: %s port at %s\n",
 431                      serio->name, psmouse->phys);
 432         serio_register_port(serio);
 433 }
 434
 435 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_LED
 436 /*
 437  * LED handling:
 438  * Some Synaptics devices have an embeded LED at the top-left corner.
 439  */
 440
 441 struct synaptics_led {
 442         struct psmouse *psmouse;
 443         struct work_struct work;
 444         struct led_classdev cdev;
 445 };
 446
 447 static void synaptics_set_led(struct psmouse *psmouse, int on)
 448 {
 449         int i;
 450         unsigned char cmd = on ? 0x88 : 0x10;
 451
 452         ps2_begin_command(&psmouse->ps2dev);
 453         if (__ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
 454                 goto out;
 455         for (i = 6; i >= 0; i -= 2) {
 456                 unsigned char d = (cmd >> i) & 3;
 457                 if (__ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
 458                         goto out;
 459         }
 460         cmd = 0x0a;
 461         __ps2_command(&psmouse->ps2dev, &cmd, PSMOUSE_CMD_SETRATE);
 462  out:
 463         ps2_end_command(&psmouse->ps2dev);
 464 }
 465
 466 static void synaptics_led_work(struct work_struct *work)
 467 {
 468         struct synaptics_led *led;
 469
 470         led = container_of(work, struct synaptics_led, work);
 471         synaptics_set_led(led->psmouse, led->cdev.brightness);
 472 }
 473
 474 static void synaptics_led_cdev_brightness_set(struct led_classdev *cdev,
 475                                               enum led_brightness value)
 476 {
 477         struct synaptics_led *led;
 478
 479         led = container_of(cdev, struct synaptics_led, cdev);
 480         schedule_work(&led->work);
 481 }
 482
 483 static void synaptics_sync_led(struct psmouse *psmouse)
 484 {
 485         struct synaptics_data *priv = psmouse->private;
 486
 487         if (priv->led)
 488                 synaptics_set_led(psmouse, priv->led->cdev.brightness);
 489 }
 490
 491 static int synaptics_init_led(struct psmouse *psmouse)
 492 {
 493         struct synaptics_data *priv = psmouse->private;
 494         struct synaptics_led *led;
 495         int err;
 496
 497         /* FIXME: LED is supposedly detectable in cap0c[1] 0x20, but it seems
 498          * not working on real machines.
 499          * So we check the product id to be sure.
 500          */
 501         if (!priv->ext_cap_0c || SYN_CAP_PRODUCT_ID(priv->ext_cap) != 0xe4)
 502                 return 0;
 503
 504         printk(KERN_INFO "synaptics: support LED control\n");
 505         led = kzalloc(sizeof(struct synaptics_led), GFP_KERNEL);
 506         if (!led)
 507                 return -ENOMEM;
 508         led->psmouse = psmouse;
 509         INIT_WORK(&led->work, synaptics_led_work);
 510         led->cdev.name = "psmouse::synaptics";
 511         led->cdev.brightness_set = synaptics_led_cdev_brightness_set;
 512         led->cdev.flags = LED_CORE_SUSPENDRESUME;
 513         err = led_classdev_register(NULL, &led->cdev);
 514         if (err < 0) {
 515                 kfree(led);
 516                 return err;
 517         }
 518         priv->led = led;
 519         return 0;
 520 }
 521
 522 static void synaptics_free_led(struct psmouse *psmouse)
 523 {
 524         struct synaptics_data *priv = psmouse->private;
 525
 526         if (!priv->led)
 527                 return;
 528         cancel_work_sync(&priv->led->work);
 529         synaptics_set_led(psmouse, 0);
 530         led_classdev_unregister(&priv->led->cdev);
 531         kfree(priv->led);
 532 }
 533 #else
 534 #define synaptics_init_led(ps)  0
 535 #define synaptics_free_led(ps)  do {} while (0)
 536 #define synaptics_sync_led(ps)  do {} while (0)
 537 #endif
 538
 539 /*****************************************************************************
 540  *      Functions to interpret the absolute mode packets
 541  ****************************************************************************/
 542
 543 static void synaptics_mt_state_set(struct synaptics_mt_state *state, int count,
 544                                    int sgm, int agm)
 545 {
 546         state->count = count;
 547         state->sgm = sgm;
 548         state->agm = agm;
 549 }
 550
 551 static void synaptics_parse_agm(const unsigned char buf[],
 552                                 struct synaptics_data *priv,
 553                                 struct synaptics_hw_state *hw)
 554 {
 555         struct synaptics_hw_state *agm = &priv->agm;
 556         int agm_packet_type;
 557
 558         agm_packet_type = (buf[5] & 0x30) >> 4;
 559         switch (agm_packet_type) {
 560         case 1:
 561                 /* Gesture packet: (x, y, z) half resolution */
 562                 agm->w = hw->w;
 563                 agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 564                 agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 565                 agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 566                 break;
 567
 568         case 2:
 569                 /* AGM-CONTACT packet: (count, sgm, agm) */
 570                 synaptics_mt_state_set(&agm->mt_state, buf[1], buf[2], buf[4]);
 571                 break;
 572
 573         default:
 574                 break;
 575         }
 576
 577         /* Record that at least one AGM has been received since last SGM */
 578         priv->agm_pending = true;
 579 }
 580
 581 static int synaptics_parse_hw_state(const unsigned char buf[],
 582                                     struct synaptics_data *priv,
 583                                     struct synaptics_hw_state *hw)
 584 {
 585         memset(hw, 0, sizeof(struct synaptics_hw_state));
 586
 587         if (SYN_MODEL_NEWABS(priv->model_id)) {
 588                 hw->w = (((buf[0] & 0x30) >> 2) |
 589                          ((buf[0] & 0x04) >> 1) |
 590                          ((buf[3] & 0x04) >> 2));
 591
 592                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 593                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 594
 595                 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 596                         /*
 597                          * Clickpad's button is transmitted as middle button,
 598                          * however, since it is primary button, we will report
 599                          * it as BTN_LEFT.
 600                          */
 601                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 602
 603                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 604                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 605                         if (hw->w == 2)
 606                                 hw->scroll = (signed char)(buf[1]);
 607                 }
 608
 609                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 610                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 611                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 612                 }
 613
 614                 if ((SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) ||
 615                         SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) &&
 616                     hw->w == 2) {
 617                         synaptics_parse_agm(buf, priv, hw);
 618                         return 1;
 619                 }
 620
 621                 hw->x = (((buf[3] & 0x10) << 8) |
 622                          ((buf[1] & 0x0f) << 8) |
 623                          buf[4]);
 624                 hw->y = (((buf[3] & 0x20) << 7) |
 625                          ((buf[1] & 0xf0) << 4) |
 626                          buf[5]);
 627                 hw->z = buf[2];
 628
 629                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 630                     ((buf[0] ^ buf[3]) & 0x02)) {
 631                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 632                         default:
 633                                 /*
 634                                  * if nExtBtn is greater than 8 it should be
 635                                  * considered invalid and treated as 0
 636                                  */
 637                                 break;
 638                         case 8:
 639                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 640                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 641                         case 6:
 642                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 643                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 644                         case 4:
 645                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 646                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 647                         case 2:
 648                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 649                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 650                         }
 651                 }
 652         } else {
 653                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 654                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 655
 656                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 657                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 658
 659                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 660                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 661         }
 662
 663         return 0;
 664 }
 665
 666 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 667                                           bool active, int x, int y)
 668 {
 669         input_mt_slot(dev, slot);
 670         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 671         if (active) {
 672                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 673                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 674         }
 675 }
 676
 677 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 678                                           const struct synaptics_hw_state *a,
 679                                           const struct synaptics_hw_state *b,
 680                                           int num_fingers)
 681 {
 682         if (num_fingers >= 2) {
 683                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 684                                               min(a->y, b->y));
 685                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 686                                               max(a->y, b->y));
 687         } else if (num_fingers == 1) {
 688                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 689                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 690         } else {
 691                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 692                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 693         }
 694 }
 695
 696 static void synaptics_report_buttons(struct psmouse *psmouse,
 697                                      const struct synaptics_hw_state *hw)
 698 {
 699         struct input_dev *dev = psmouse->dev;
 700         struct synaptics_data *priv = psmouse->private;
 701         int i;
 702
 703         input_report_key(dev, BTN_LEFT, hw->left);
 704         input_report_key(dev, BTN_RIGHT, hw->right);
 705
 706         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 707                 input_report_key(dev, BTN_MIDDLE, hw->middle);
 708
 709         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 710                 input_report_key(dev, BTN_FORWARD, hw->up);
 711                 input_report_key(dev, BTN_BACK, hw->down);
 712         }
 713
 714         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 715                 input_report_key(dev, BTN_0 + i, hw->ext_buttons & (1 << i));
 716 }
 717
 718 static void synaptics_report_slot(struct input_dev *dev, int slot,
 719                                   const struct synaptics_hw_state *hw)
 720 {
 721         input_mt_slot(dev, slot);
 722         input_mt_report_slot_state(dev, MT_TOOL_FINGER, (hw != NULL));
 723         if (!hw)
 724                 return;
 725
 726         input_report_abs(dev, ABS_MT_POSITION_X, hw->x);
 727         input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(hw->y));
 728         input_report_abs(dev, ABS_MT_PRESSURE, hw->z);
 729 }
 730
 731 static void synaptics_report_mt_data(struct psmouse *psmouse,
 732                                      struct synaptics_mt_state *mt_state,
 733                                      const struct synaptics_hw_state *sgm)
 734 {
 735         struct input_dev *dev = psmouse->dev;
 736         struct synaptics_data *priv = psmouse->private;
 737         struct synaptics_hw_state *agm = &priv->agm;
 738         struct synaptics_mt_state *old = &priv->mt_state;
 739
 740         switch (mt_state->count) {
 741         case 0:
 742                 synaptics_report_slot(dev, 0, NULL);
 743                 synaptics_report_slot(dev, 1, NULL);
 744                 break;
 745         case 1:
 746                 if (mt_state->sgm == -1) {
 747                         synaptics_report_slot(dev, 0, NULL);
 748                         synaptics_report_slot(dev, 1, NULL);
 749                 } else if (mt_state->sgm == 0) {
 750                         synaptics_report_slot(dev, 0, sgm);
 751                         synaptics_report_slot(dev, 1, NULL);
 752                 } else {
 753                         synaptics_report_slot(dev, 0, NULL);
 754                         synaptics_report_slot(dev, 1, sgm);
 755                 }
 756                 break;
 757         default:
 758                 /*
 759                  * If the finger slot contained in SGM is valid, and either
 760                  * hasn't changed, or is new, then report SGM in MTB slot 0.
 761                  * Otherwise, empty MTB slot 0.
 762                  */
 763                 if (mt_state->sgm != -1 &&
 764                     (mt_state->sgm == old->sgm || old->sgm == -1))
 765                         synaptics_report_slot(dev, 0, sgm);
 766                 else
 767                         synaptics_report_slot(dev, 0, NULL);
 768
 769                 /*
 770                  * If the finger slot contained in AGM is valid, and either
 771                  * hasn't changed, or is new, then report AGM in MTB slot 1.
 772                  * Otherwise, empty MTB slot 1.
 773                  */
 774                 if (mt_state->agm != -1 &&
 775                     (mt_state->agm == old->agm || old->agm == -1))
 776                         synaptics_report_slot(dev, 1, agm);
 777                 else
 778                         synaptics_report_slot(dev, 1, NULL);
 779                 break;
 780         }
 781
 782         /* Don't use active slot count to generate BTN_TOOL events. */
 783         input_mt_report_pointer_emulation(dev, false);
 784
 785         /* Send the number of fingers reported by touchpad itself. */
 786         input_mt_report_finger_count(dev, mt_state->count);
 787
 788         synaptics_report_buttons(psmouse, sgm);
 789
 790         input_sync(dev);
 791 }
 792
 793 /* Handle case where mt_state->count = 0 */
 794 static void synaptics_image_sensor_0f(struct synaptics_data *priv,
 795                                       struct synaptics_mt_state *mt_state)
 796 {
 797         synaptics_mt_state_set(mt_state, 0, -1, -1);
 798         priv->mt_state_lost = false;
 799 }
 800
 801 /* Handle case where mt_state->count = 1 */
 802 static void synaptics_image_sensor_1f(struct synaptics_data *priv,
 803                                       struct synaptics_mt_state *mt_state)
 804 {
 805         struct synaptics_hw_state *agm = &priv->agm;
 806         struct synaptics_mt_state *old = &priv->mt_state;
 807
 808         /*
 809          * If the last AGM was (0,0,0), and there is only one finger left,
 810          * then we absolutely know that SGM contains slot 0, and all other
 811          * fingers have been removed.
 812          */
 813         if (priv->agm_pending && agm->z == 0) {
 814                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 815                 priv->mt_state_lost = false;
 816                 return;
 817         }
 818
 819         switch (old->count) {
 820         case 0:
 821                 synaptics_mt_state_set(mt_state, 1, 0, -1);
 822                 break;
 823         case 1:
 824                 /*
 825                  * If mt_state_lost, then the previous transition was 3->1,
 826                  * and SGM now contains either slot 0 or 1, but we don't know
 827                  * which.  So, we just assume that the SGM now contains slot 1.
 828                  *
 829                  * If pending AGM and either:
 830                  *   (a) the previous SGM slot contains slot 0, or
 831                  *   (b) there was no SGM slot
 832                  * then, the SGM now contains slot 1
 833                  *
 834                  * Case (a) happens with very rapid "drum roll" gestures, where
 835                  * slot 0 finger is lifted and a new slot 1 finger touches
 836                  * within one reporting interval.
 837                  *
 838                  * Case (b) happens if initially two or more fingers tap
 839                  * briefly, and all but one lift before the end of the first
 840                  * reporting interval.
 841                  *
 842                  * (In both these cases, slot 0 will becomes empty, so SGM
 843                  * contains slot 1 with the new finger)
 844                  *
 845                  * Else, if there was no previous SGM, it now contains slot 0.
 846                  *
 847                  * Otherwise, SGM still contains the same slot.
 848                  */
 849                 if (priv->mt_state_lost ||
 850                     (priv->agm_pending && old->sgm <= 0))
 851                         synaptics_mt_state_set(mt_state, 1, 1, -1);
 852                 else if (old->sgm == -1)
 853                         synaptics_mt_state_set(mt_state, 1, 0, -1);
 854                 break;
 855         case 2:
 856                 /*
 857                  * If mt_state_lost, we don't know which finger SGM contains.
 858                  *
 859                  * So, report 1 finger, but with both slots empty.
 860                  * We will use slot 1 on subsequent 1->1
 861                  */
 862                 if (priv->mt_state_lost) {
 863                         synaptics_mt_state_set(mt_state, 1, -1, -1);
 864                         break;
 865                 }
 866                 /*
 867                  * Since the last AGM was NOT (0,0,0), it was the finger in
 868                  * slot 0 that has been removed.
 869                  * So, SGM now contains previous AGM's slot, and AGM is now
 870                  * empty.
 871                  */
 872                 synaptics_mt_state_set(mt_state, 1, old->agm, -1);
 873                 break;
 874         case 3:
 875                 /*
 876                  * Since last AGM was not (0,0,0), we don't know which finger
 877                  * is left.
 878                  *
 879                  * So, report 1 finger, but with both slots empty.
 880                  * We will use slot 1 on subsequent 1->1
 881                  */
 882                 synaptics_mt_state_set(mt_state, 1, -1, -1);
 883                 priv->mt_state_lost = true;
 884                 break;
 885         case 4:
 886         case 5:
 887                 /* mt_state was updated by AGM-CONTACT packet */
 888                 break;
 889         }
 890 }
 891
 892 /* Handle case where mt_state->count = 2 */
 893 static void synaptics_image_sensor_2f(struct synaptics_data *priv,
 894                                       struct synaptics_mt_state *mt_state)
 895 {
 896         struct synaptics_mt_state *old = &priv->mt_state;
 897
 898         switch (old->count) {
 899         case 0:
 900                 synaptics_mt_state_set(mt_state, 2, 0, 1);
 901                 break;
 902         case 1:
 903                 /*
 904                  * If previous SGM contained slot 1 or higher, SGM now contains
 905                  * slot 0 (the newly touching finger) and AGM contains SGM's
 906                  * previous slot.
 907                  *
 908                  * Otherwise, SGM still contains slot 0 and AGM now contains
 909                  * slot 1.
 910                  */
 911                 if (old->sgm >= 1)
 912                         synaptics_mt_state_set(mt_state, 2, 0, old->sgm);
 913                 else
 914                         synaptics_mt_state_set(mt_state, 2, 0, 1);
 915                 break;
 916         case 2:
 917                 /*
 918                  * If mt_state_lost, SGM now contains either finger 1 or 2, but
 919                  * we don't know which.
 920                  * So, we just assume that the SGM contains slot 0 and AGM 1.
 921                  */
 922                 if (priv->mt_state_lost)
 923                         synaptics_mt_state_set(mt_state, 2, 0, 1);
 924                 /*
 925                  * Otherwise, use the same mt_state, since it either hasn't
 926                  * changed, or was updated by a recently received AGM-CONTACT
 927                  * packet.
 928                  */
 929                 break;
 930         case 3:
 931                 /*
 932                  * 3->2 transitions have two unsolvable problems:
 933                  *  1) no indication is given which finger was removed
 934                  *  2) no way to tell if agm packet was for finger 3
 935                  *     before 3->2, or finger 2 after 3->2.
 936                  *
 937                  * So, report 2 fingers, but empty all slots.
 938                  * We will guess slots [0,1] on subsequent 2->2.
 939                  */
 940                 synaptics_mt_state_set(mt_state, 2, -1, -1);
 941                 priv->mt_state_lost = true;
 942                 break;
 943         case 4:
 944         case 5:
 945                 /* mt_state was updated by AGM-CONTACT packet */
 946                 break;
 947         }
 948 }
 949
 950 /* Handle case where mt_state->count = 3 */
 951 static void synaptics_image_sensor_3f(struct synaptics_data *priv,
 952                                       struct synaptics_mt_state *mt_state)
 953 {
 954         struct synaptics_mt_state *old = &priv->mt_state;
 955
 956         switch (old->count) {
 957         case 0:
 958                 synaptics_mt_state_set(mt_state, 3, 0, 2);
 959                 break;
 960         case 1:
 961                 /*
 962                  * If previous SGM contained slot 2 or higher, SGM now contains
 963                  * slot 0 (one of the newly touching fingers) and AGM contains
 964                  * SGM's previous slot.
 965                  *
 966                  * Otherwise, SGM now contains slot 0 and AGM contains slot 2.
 967                  */
 968                 if (old->sgm >= 2)
 969                         synaptics_mt_state_set(mt_state, 3, 0, old->sgm);
 970                 else
 971                         synaptics_mt_state_set(mt_state, 3, 0, 2);
 972                 break;
 973         case 2:
 974                 /*
 975                  * If the AGM previously contained slot 3 or higher, then the
 976                  * newly touching finger is in the lowest available slot.
 977                  *
 978                  * If SGM was previously 1 or higher, then the new SGM is
 979                  * now slot 0 (with a new finger), otherwise, the new finger
 980                  * is now in a hidden slot between 0 and AGM's slot.
 981                  *
 982                  * In all such cases, the SGM now contains slot 0, and the AGM
 983                  * continues to contain the same slot as before.
 984                  */
 985                 if (old->agm >= 3) {
 986                         synaptics_mt_state_set(mt_state, 3, 0, old->agm);
 987                         break;
 988                 }
 989
 990                 /*
 991                  * After some 3->1 and all 3->2 transitions, we lose track
 992                  * of which slot is reported by SGM and AGM.
 993                  *
 994                  * For 2->3 in this state, report 3 fingers, but empty all
 995                  * slots, and we will guess (0,2) on a subsequent 0->3.
 996                  *
 997                  * To userspace, the resulting transition will look like:
 998                  *    2:[0,1] -> 3:[-1,-1] -> 3:[0,2]
 999                  */
1000                 if (priv->mt_state_lost) {
1001                         synaptics_mt_state_set(mt_state, 3, -1, -1);
1002                         break;
1003                 }
1004
1005                 /*
1006                  * If the (SGM,AGM) really previously contained slots (0, 1),
1007                  * then we cannot know what slot was just reported by the AGM,
1008                  * because the 2->3 transition can occur either before or after
1009                  * the AGM packet. Thus, this most recent AGM could contain
1010                  * either the same old slot 1 or the new slot 2.
1011                  * Subsequent AGMs will be reporting slot 2.
1012                  *
1013                  * To userspace, the resulting transition will look like:
1014                  *    2:[0,1] -> 3:[0,-1] -> 3:[0,2]
1015                  */
1016                 synaptics_mt_state_set(mt_state, 3, 0, -1);
1017                 break;
1018         case 3:
1019                 /*
1020                  * If, for whatever reason, the previous agm was invalid,
1021                  * Assume SGM now contains slot 0, AGM now contains slot 2.
1022                  */
1023                 if (old->agm <= 2)
1024                         synaptics_mt_state_set(mt_state, 3, 0, 2);
1025                 /*
1026                  * mt_state either hasn't changed, or was updated by a recently
1027                  * received AGM-CONTACT packet.
1028                  */
1029                 break;
1030
1031         case 4:
1032         case 5:
1033                 /* mt_state was updated by AGM-CONTACT packet */
1034                 break;
1035         }
1036 }
1037
1038 /* Handle case where mt_state->count = 4, or = 5 */
1039 static void synaptics_image_sensor_45f(struct synaptics_data *priv,
1040                                        struct synaptics_mt_state *mt_state)
1041 {
1042         /* mt_state was updated correctly by AGM-CONTACT packet */
1043         priv->mt_state_lost = false;
1044 }
1045
1046 static void synaptics_image_sensor_process(struct psmouse *psmouse,
1047                                            struct synaptics_hw_state *sgm)
1048 {
1049         struct synaptics_data *priv = psmouse->private;
1050         struct synaptics_hw_state *agm = &priv->agm;
1051         struct synaptics_mt_state mt_state;
1052
1053         /* Initialize using current mt_state (as updated by last agm) */
1054         mt_state = agm->mt_state;
1055
1056         /*
1057          * Update mt_state using the new finger count and current mt_state.
1058          */
1059         if (sgm->z == 0)
1060                 synaptics_image_sensor_0f(priv, &mt_state);
1061         else if (sgm->w >= 4)
1062                 synaptics_image_sensor_1f(priv, &mt_state);
1063         else if (sgm->w == 0)
1064                 synaptics_image_sensor_2f(priv, &mt_state);
1065         else if (sgm->w == 1 && mt_state.count <= 3)
1066                 synaptics_image_sensor_3f(priv, &mt_state);
1067         else
1068                 synaptics_image_sensor_45f(priv, &mt_state);
1069
1070         /* Send resulting input events to user space */
1071         synaptics_report_mt_data(psmouse, &mt_state, sgm);
1072
1073         /* Store updated mt_state */
1074         priv->mt_state = agm->mt_state = mt_state;
1075         priv->agm_pending = false;
1076 }
1077
1078 /*
1079  *  called for each full received packet from the touchpad
1080  */
1081 static void synaptics_process_packet(struct psmouse *psmouse)
1082 {
1083         struct input_dev *dev = psmouse->dev;
1084         struct synaptics_data *priv = psmouse->private;
1085         struct synaptics_hw_state hw;
1086         int num_fingers;
1087         int finger_width;
1088
1089         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
1090                 return;
1091
1092         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1093                 synaptics_image_sensor_process(psmouse, &hw);
1094                 return;
1095         }
1096
1097         if (hw.scroll) {
1098                 priv->scroll += hw.scroll;
1099
1100                 while (priv->scroll >= 4) {
1101                         input_report_key(dev, BTN_BACK, !hw.down);
1102                         input_sync(dev);
1103                         input_report_key(dev, BTN_BACK, hw.down);
1104                         input_sync(dev);
1105                         priv->scroll -= 4;
1106                 }
1107                 while (priv->scroll <= -4) {
1108                         input_report_key(dev, BTN_FORWARD, !hw.up);
1109                         input_sync(dev);
1110                         input_report_key(dev, BTN_FORWARD, hw.up);
1111                         input_sync(dev);
1112                         priv->scroll += 4;
1113                 }
1114                 return;
1115         }
1116
1117         if (hw.z > 0 && hw.x > 1) {
1118                 num_fingers = 1;
1119                 finger_width = 5;
1120                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
1121                         switch (hw.w) {
1122                         case 0 ... 1:
1123                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
1124                                         num_fingers = hw.w + 2;
1125                                 break;
1126                         case 2:
1127                                 if (SYN_MODEL_PEN(priv->model_id))
1128                                         ;   /* Nothing, treat a pen as a single finger */
1129                                 break;
1130                         case 4 ... 15:
1131                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
1132                                         finger_width = hw.w;
1133                                 break;
1134                         }
1135                 }
1136         } else {
1137                 num_fingers = 0;
1138                 finger_width = 0;
1139         }
1140
1141         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
1142                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
1143                                               num_fingers);
1144
1145         /* Post events
1146          * BTN_TOUCH has to be first as mousedev relies on it when doing
1147          * absolute -> relative conversion
1148          */
1149         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
1150         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
1151
1152         if (num_fingers > 0) {
1153                 input_report_abs(dev, ABS_X, hw.x);
1154                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
1155         }
1156         input_report_abs(dev, ABS_PRESSURE, hw.z);
1157
1158         if (SYN_CAP_PALMDETECT(priv->capabilities))
1159                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
1160
1161         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
1162         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1163                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
1164                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
1165         }
1166
1167         synaptics_report_buttons(psmouse, &hw);
1168
1169         input_sync(dev);
1170 }
1171
1172 static int synaptics_validate_byte(struct psmouse *psmouse,
1173                                    int idx, unsigned char pkt_type)
1174 {
1175         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
1176         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
1177         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
1178         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
1179         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
1180         const char *packet = psmouse->packet;
1181
1182         if (idx < 0 || idx > 4)
1183                 return 0;
1184
1185         switch (pkt_type) {
1186
1187         case SYN_NEWABS:
1188         case SYN_NEWABS_RELAXED:
1189                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
1190
1191         case SYN_NEWABS_STRICT:
1192                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
1193
1194         case SYN_OLDABS:
1195                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
1196
1197         default:
1198                 psmouse_err(psmouse, "unknown packet type %d\n", pkt_type);
1199                 return 0;
1200         }
1201 }
1202
1203 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
1204 {
1205         int i;
1206
1207         for (i = 0; i < 5; i++)
1208                 if (!synaptics_validate_byte(psmouse, i, SYN_NEWABS_STRICT)) {
1209                         psmouse_info(psmouse, "using relaxed packet validation\n");
1210                         return SYN_NEWABS_RELAXED;
1211                 }
1212
1213         return SYN_NEWABS_STRICT;
1214 }
1215
1216 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
1217 {
1218         struct synaptics_data *priv = psmouse->private;
1219
1220         if (psmouse->pktcnt >= 6) { /* Full packet received */
1221                 if (unlikely(priv->pkt_type == SYN_NEWABS))
1222                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
1223
1224                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
1225                     synaptics_is_pt_packet(psmouse->packet)) {
1226                         if (priv->pt_port)
1227                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
1228                 } else
1229                         synaptics_process_packet(psmouse);
1230
1231                 return PSMOUSE_FULL_PACKET;
1232         }
1233
1234         return synaptics_validate_byte(psmouse, psmouse->pktcnt - 1, priv->pkt_type) ?
1235                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
1236 }
1237
1238 /*****************************************************************************
1239  *      Driver initialization/cleanup functions
1240  ****************************************************************************/
1241 static void set_abs_position_params(struct input_dev *dev,
1242                                     struct synaptics_data *priv, int x_code,
1243                                     int y_code)
1244 {
1245         int x_min = priv->x_min ?: XMIN_NOMINAL;
1246         int x_max = priv->x_max ?: XMAX_NOMINAL;
1247         int y_min = priv->y_min ?: YMIN_NOMINAL;
1248         int y_max = priv->y_max ?: YMAX_NOMINAL;
1249         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
1250                         SYN_REDUCED_FILTER_FUZZ : 0;
1251
1252         input_set_abs_params(dev, x_code, x_min, x_max, fuzz, 0);
1253         input_set_abs_params(dev, y_code, y_min, y_max, fuzz, 0);
1254         input_abs_set_res(dev, x_code, priv->x_res);
1255         input_abs_set_res(dev, y_code, priv->y_res);
1256 }
1257
1258 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
1259 {
1260         int i;
1261
1262         /* Things that apply to both modes */
1263         __set_bit(INPUT_PROP_POINTER, dev->propbit);
1264         __set_bit(EV_KEY, dev->evbit);
1265         __set_bit(BTN_LEFT, dev->keybit);
1266         __set_bit(BTN_RIGHT, dev->keybit);
1267
1268         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
1269                 __set_bit(BTN_MIDDLE, dev->keybit);
1270
1271         if (!priv->absolute_mode) {
1272                 /* Relative mode */
1273                 __set_bit(EV_REL, dev->evbit);
1274                 __set_bit(REL_X, dev->relbit);
1275                 __set_bit(REL_Y, dev->relbit);
1276                 return;
1277         }
1278
1279         /* Absolute mode */
1280         __set_bit(EV_ABS, dev->evbit);
1281         set_abs_position_params(dev, priv, ABS_X, ABS_Y);
1282         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
1283
1284         if (SYN_CAP_IMAGE_SENSOR(priv->ext_cap_0c)) {
1285                 input_mt_init_slots(dev, 2);
1286                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1287                                         ABS_MT_POSITION_Y);
1288                 /* Image sensors can report per-contact pressure */
1289                 input_set_abs_params(dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
1290
1291                 /* Image sensors can signal 4 and 5 finger clicks */
1292                 __set_bit(BTN_TOOL_QUADTAP, dev->keybit);
1293                 __set_bit(BTN_TOOL_QUINTTAP, dev->keybit);
1294         } else if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
1295                 /* Non-image sensors with AGM use semi-mt */
1296                 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
1297                 input_mt_init_slots(dev, 2);
1298                 set_abs_position_params(dev, priv, ABS_MT_POSITION_X,
1299                                         ABS_MT_POSITION_Y);
1300         }
1301
1302         if (SYN_CAP_PALMDETECT(priv->capabilities))
1303                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
1304
1305         __set_bit(BTN_TOUCH, dev->keybit);
1306         __set_bit(BTN_TOOL_FINGER, dev->keybit);
1307
1308         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
1309                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
1310                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
1311         }
1312
1313         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
1314             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
1315                 __set_bit(BTN_FORWARD, dev->keybit);
1316                 __set_bit(BTN_BACK, dev->keybit);
1317         }
1318
1319         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
1320                 __set_bit(BTN_0 + i, dev->keybit);
1321
1322         __clear_bit(EV_REL, dev->evbit);
1323         __clear_bit(REL_X, dev->relbit);
1324         __clear_bit(REL_Y, dev->relbit);
1325
1326         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
1327                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
1328                 /* Clickpads report only left button */
1329                 __clear_bit(BTN_RIGHT, dev->keybit);
1330                 __clear_bit(BTN_MIDDLE, dev->keybit);
1331         }
1332 }
1333
1334 static ssize_t synaptics_show_disable_gesture(struct psmouse *psmouse,
1335                                               void *data, char *buf)
1336 {
1337         struct synaptics_data *priv = psmouse->private;
1338
1339         return sprintf(buf, "%c\n", priv->disable_gesture ? '1' : '0');
1340 }
1341
1342 static ssize_t synaptics_set_disable_gesture(struct psmouse *psmouse,
1343                                              void *data, const char *buf,
1344                                              size_t len)
1345 {
1346         struct synaptics_data *priv = psmouse->private;
1347         unsigned int value;
1348         int err;
1349
1350         err = kstrtouint(buf, 10, &value);
1351         if (err)
1352                 return err;
1353
1354         if (value > 1)
1355                 return -EINVAL;
1356
1357         if (value == priv->disable_gesture)
1358                 return len;
1359
1360         priv->disable_gesture = value;
1361         if (value)
1362                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
1363         else
1364                 priv->mode &= ~SYN_BIT_DISABLE_GESTURE;
1365
1366         if (synaptics_mode_cmd(psmouse, priv->mode))
1367                 return -EIO;
1368
1369         return len;
1370 }
1371
1372 PSMOUSE_DEFINE_ATTR(disable_gesture, S_IWUSR | S_IRUGO, NULL,
1373                     synaptics_show_disable_gesture,
1374                     synaptics_set_disable_gesture);
1375
1376 static void synaptics_disconnect(struct psmouse *psmouse)
1377 {
1378         struct synaptics_data *priv = psmouse->private;
1379
1380         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity))
1381                 device_remove_file(&psmouse->ps2dev.serio->dev,
1382                                    &psmouse_attr_disable_gesture.dattr);
1383
1384         synaptics_free_led(psmouse);
1385         synaptics_reset(psmouse);
1386         kfree(priv);
1387         psmouse->private = NULL;
1388 }
1389
1390 static int synaptics_reconnect(struct psmouse *psmouse)
1391 {
1392         struct synaptics_data *priv = psmouse->private;
1393         struct synaptics_data old_priv = *priv;
1394         int retry = 0;
1395         int error;
1396
1397         do {
1398                 psmouse_reset(psmouse);
1399                 if (retry) {
1400                         /*
1401                          * On some boxes, right after resuming, the touchpad
1402                          * needs some time to finish initializing (I assume
1403                          * it needs time to calibrate) and start responding
1404                          * to Synaptics-specific queries, so let's wait a
1405                          * bit.
1406                          */
1407                         ssleep(1);
1408                 }
1409                 error = synaptics_detect(psmouse, 0);
1410         } while (error && ++retry < 3);
1411
1412         if (error)
1413                 return -1;
1414
1415         if (retry > 1)
1416                 psmouse_dbg(psmouse, "reconnected after %d tries\n", retry);
1417
1418         if (synaptics_query_hardware(psmouse)) {
1419                 psmouse_err(psmouse, "Unable to query device.\n");
1420                 return -1;
1421         }
1422
1423         if (synaptics_set_mode(psmouse)) {
1424                 psmouse_err(psmouse, "Unable to initialize device.\n");
1425                 return -1;
1426         }
1427
1428         if (old_priv.identity != priv->identity ||
1429             old_priv.model_id != priv->model_id ||
1430             old_priv.capabilities != priv->capabilities ||
1431             old_priv.ext_cap != priv->ext_cap) {
1432                 psmouse_err(psmouse,
1433                             "hardware appears to be different: id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
1434                             old_priv.identity, priv->identity,
1435                             old_priv.model_id, priv->model_id,
1436                             old_priv.capabilities, priv->capabilities,
1437                             old_priv.ext_cap, priv->ext_cap);
1438                 return -1;
1439         }
1440
1441         synaptics_sync_led(psmouse);
1442
1443         return 0;
1444 }
1445
1446 static bool impaired_toshiba_kbc;
1447
1448 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
1449 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
1450         {
1451                 /* Toshiba Satellite */
1452                 .matches = {
1453                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1454                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
1455                 },
1456         },
1457         {
1458                 /* Toshiba Dynabook */
1459                 .matches = {
1460                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1461                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
1462                 },
1463         },
1464         {
1465                 /* Toshiba Portege M300 */
1466                 .matches = {
1467                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1468                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
1469                 },
1470
1471         },
1472         {
1473                 /* Toshiba Portege M300 */
1474                 .matches = {
1475                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
1476                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
1477                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
1478                 },
1479
1480         },
1481 #endif
1482         { }
1483 };
1484
1485 static bool broken_olpc_ec;
1486
1487 static const struct dmi_system_id __initconst olpc_dmi_table[] = {
1488 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
1489         {
1490                 /* OLPC XO-1 or XO-1.5 */
1491                 .matches = {
1492                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
1493                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
1494                 },
1495         },
1496 #endif
1497         { }
1498 };
1499
1500 void __init synaptics_module_init(void)
1501 {
1502         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
1503         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
1504 }
1505
1506 static int __synaptics_init(struct psmouse *psmouse, bool absolute_mode)
1507 {
1508         struct synaptics_data *priv;
1509         int err = -1;
1510
1511         /*
1512          * The OLPC XO has issues with Synaptics' absolute mode; the constant
1513          * packet spew overloads the EC such that key presses on the keyboard
1514          * are missed.  Given that, don't even attempt to use Absolute mode.
1515          * Relative mode seems to work just fine.
1516          */
1517         if (absolute_mode && broken_olpc_ec) {
1518                 psmouse_info(psmouse,
1519                              "OLPC XO detected, not enabling Synaptics protocol.\n");
1520                 return -ENODEV;
1521         }
1522
1523         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
1524         if (!priv)
1525                 return -ENOMEM;
1526
1527         psmouse_reset(psmouse);
1528
1529         if (synaptics_query_hardware(psmouse)) {
1530                 psmouse_err(psmouse, "Unable to query device.\n");
1531                 goto init_fail;
1532         }
1533
1534         priv->absolute_mode = absolute_mode;
1535         if (SYN_ID_DISGEST_SUPPORTED(priv->identity))
1536                 priv->disable_gesture = true;
1537
1538         if (synaptics_set_mode(psmouse)) {
1539                 psmouse_err(psmouse, "Unable to initialize device.\n");
1540                 goto init_fail;
1541         }
1542
1543         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
1544
1545         psmouse_info(psmouse,
1546                      "Touchpad model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
1547                      SYN_ID_MODEL(priv->identity),
1548                      SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
1549                      priv->model_id,
1550                      priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
1551
1552         if (synaptics_init_led(psmouse) < 0)
1553                 goto init_fail;
1554
1555         set_input_params(psmouse->dev, priv);
1556
1557         /*
1558          * Encode touchpad model so that it can be used to set
1559          * input device->id.version and be visible to userspace.
1560          * Because version is __u16 we have to drop something.
1561          * Hardware info bits seem to be good candidates as they
1562          * are documented to be for Synaptics corp. internal use.
1563          */
1564         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
1565                           (priv->model_id & 0x000000ff);
1566
1567         if (absolute_mode) {
1568                 psmouse->protocol_handler = synaptics_process_byte;
1569                 psmouse->pktsize = 6;
1570         } else {
1571                 /* Relative mode follows standard PS/2 mouse protocol */
1572                 psmouse->protocol_handler = psmouse_process_byte;
1573                 psmouse->pktsize = 3;
1574         }
1575
1576         psmouse->set_rate = synaptics_set_rate;
1577         psmouse->disconnect = synaptics_disconnect;
1578         psmouse->reconnect = synaptics_reconnect;
1579         psmouse->cleanup = synaptics_reset;
1580         /* Synaptics can usually stay in sync without extra help */
1581         psmouse->resync_time = 0;
1582
1583         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
1584                 synaptics_pt_create(psmouse);
1585
1586         /*
1587          * Toshiba's KBC seems to have trouble handling data from
1588          * Synaptics at full rate.  Switch to a lower rate (roughly
1589          * the same rate as a standard PS/2 mouse).
1590          */
1591         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
1592                 psmouse_info(psmouse,
1593                              "Toshiba %s detected, limiting rate to 40pps.\n",
1594                              dmi_get_system_info(DMI_PRODUCT_NAME));
1595                 psmouse->rate = 40;
1596         }
1597
1598         if (!priv->absolute_mode && SYN_ID_DISGEST_SUPPORTED(priv->identity)) {
1599                 err = device_create_file(&psmouse->ps2dev.serio->dev,
1600                                          &psmouse_attr_disable_gesture.dattr);
1601                 if (err) {
1602                         psmouse_err(psmouse,
1603                                     "Failed to create disable_gesture attribute (%d)",
1604                                     err);
1605                         goto init_fail;
1606                 }
1607         }
1608
1609         return 0;
1610
1611  init_fail:
1612         kfree(priv);
1613         return err;
1614 }
1615
1616 int synaptics_init(struct psmouse *psmouse)
1617 {
1618         return __synaptics_init(psmouse, true);
1619 }
1620
1621 int synaptics_init_relative(struct psmouse *psmouse)
1622 {
1623         return __synaptics_init(psmouse, false);
1624 }
1625
1626 bool synaptics_supported(void)
1627 {
1628         return true;
1629 }
1630
1631 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1632
1633 void __init synaptics_module_init(void)
1634 {
1635 }
1636
1637 int synaptics_init(struct psmouse *psmouse)
1638 {
1639         return -ENOSYS;
1640 }
1641
1642 bool synaptics_supported(void)
1643 {
1644         return false;
1645 }
1646
1647 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */