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/dmi.h>
  28 #include <linux/input/mt.h>
  29 #include <linux/serio.h>
  30 #include <linux/libps2.h>
  31 #include <linux/slab.h>
  32 #include "psmouse.h"
  33 #include "synaptics.h"
  34
  35 /*
  36  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  37  * section 2.3.2, which says that they should be valid regardless of the
  38  * actual size of the sensor.
  39  * Note that newer firmware allows querying device for maximum useable
  40  * coordinates.
  41  */
  42 #define XMIN_NOMINAL 1472
  43 #define XMAX_NOMINAL 5472
  44 #define YMIN_NOMINAL 1408
  45 #define YMAX_NOMINAL 4448
  46
  47
  48 /*****************************************************************************
  49  *      Stuff we need even when we do not want native Synaptics support
  50  ****************************************************************************/
  51
  52 /*
  53  * Set the synaptics touchpad mode byte by special commands
  54  */
  55 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  56 {
  57         unsigned char param[1];
  58
  59         if (psmouse_sliced_command(psmouse, mode))
  60                 return -1;
  61         param[0] = SYN_PS_SET_MODE2;
  62         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  63                 return -1;
  64         return 0;
  65 }
  66
  67 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  68 {
  69         struct ps2dev *ps2dev = &psmouse->ps2dev;
  70         unsigned char param[4];
  71
  72         param[0] = 0;
  73
  74         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  75         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  76         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  77         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  78         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
  79
  80         if (param[1] != 0x47)
  81                 return -ENODEV;
  82
  83         if (set_properties) {
  84                 psmouse->vendor = "Synaptics";
  85                 psmouse->name = "TouchPad";
  86         }
  87
  88         return 0;
  89 }
  90
  91 void synaptics_reset(struct psmouse *psmouse)
  92 {
  93         /* reset touchpad back to relative mode, gestures enabled */
  94         synaptics_mode_cmd(psmouse, 0);
  95 }
  96
  97 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
  98
  99 /*****************************************************************************
 100  *      Synaptics communications functions
 101  ****************************************************************************/
 102
 103 /*
 104  * Send a command to the synpatics touchpad by special commands
 105  */
 106 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 107 {
 108         if (psmouse_sliced_command(psmouse, c))
 109                 return -1;
 110         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 111                 return -1;
 112         return 0;
 113 }
 114
 115 /*
 116  * Read the model-id bytes from the touchpad
 117  * see also SYN_MODEL_* macros
 118  */
 119 static int synaptics_model_id(struct psmouse *psmouse)
 120 {
 121         struct synaptics_data *priv = psmouse->private;
 122         unsigned char mi[3];
 123
 124         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 125                 return -1;
 126         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 127         return 0;
 128 }
 129
 130 /*
 131  * Read the capability-bits from the touchpad
 132  * see also the SYN_CAP_* macros
 133  */
 134 static int synaptics_capability(struct psmouse *psmouse)
 135 {
 136         struct synaptics_data *priv = psmouse->private;
 137         unsigned char cap[3];
 138
 139         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 140                 return -1;
 141         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 142         priv->ext_cap = priv->ext_cap_0c = 0;
 143
 144         /*
 145          * Older firmwares had submodel ID fixed to 0x47
 146          */
 147         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 148             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 149                 return -1;
 150         }
 151
 152         /*
 153          * Unless capExtended is set the rest of the flags should be ignored
 154          */
 155         if (!SYN_CAP_EXTENDED(priv->capabilities))
 156                 priv->capabilities = 0;
 157
 158         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 159                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 160                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
 161                                " but I'm not able to read them.\n");
 162                 } else {
 163                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 164
 165                         /*
 166                          * if nExtBtn is greater than 8 it should be considered
 167                          * invalid and treated as 0
 168                          */
 169                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 170                                 priv->ext_cap &= 0xff0fff;
 171                 }
 172         }
 173
 174         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 175                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 176                         printk(KERN_ERR "Synaptics claims to have extended capability 0x0c,"
 177                                " but I'm not able to read it.\n");
 178                 } else {
 179                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 180                 }
 181         }
 182
 183         return 0;
 184 }
 185
 186 /*
 187  * Identify Touchpad
 188  * See also the SYN_ID_* macros
 189  */
 190 static int synaptics_identify(struct psmouse *psmouse)
 191 {
 192         struct synaptics_data *priv = psmouse->private;
 193         unsigned char id[3];
 194
 195         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 196                 return -1;
 197         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 198         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 199                 return 0;
 200         return -1;
 201 }
 202
 203 /*
 204  * Read touchpad resolution and maximum reported coordinates
 205  * Resolution is left zero if touchpad does not support the query
 206  */
 207 static int synaptics_resolution(struct psmouse *psmouse)
 208 {
 209         struct synaptics_data *priv = psmouse->private;
 210         unsigned char resp[3];
 211
 212         if (SYN_ID_MAJOR(priv->identity) < 4)
 213                 return 0;
 214
 215         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 216                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 217                         priv->x_res = resp[0]; /* x resolution in units/mm */
 218                         priv->y_res = resp[2]; /* y resolution in units/mm */
 219                 }
 220         }
 221
 222         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 223             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 224                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 225                         printk(KERN_ERR "Synaptics claims to have max coordinates"
 226                                " query, but I'm not able to read it.\n");
 227                 } else {
 228                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 229                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 230                 }
 231         }
 232
 233         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 234             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 235                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 236                         printk(KERN_ERR "Synaptics claims to have min coordinates"
 237                                " query, but I'm not able to read it.\n");
 238                 } else {
 239                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 240                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 241                 }
 242         }
 243
 244         return 0;
 245 }
 246
 247 static int synaptics_query_hardware(struct psmouse *psmouse)
 248 {
 249         if (synaptics_identify(psmouse))
 250                 return -1;
 251         if (synaptics_model_id(psmouse))
 252                 return -1;
 253         if (synaptics_capability(psmouse))
 254                 return -1;
 255         if (synaptics_resolution(psmouse))
 256                 return -1;
 257
 258         return 0;
 259 }
 260
 261 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 262 {
 263         struct synaptics_data *priv = psmouse->private;
 264
 265         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 266         if (SYN_ID_MAJOR(priv->identity) >= 4)
 267                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 268         if (SYN_CAP_EXTENDED(priv->capabilities))
 269                 priv->mode |= SYN_BIT_W_MODE;
 270
 271         if (synaptics_mode_cmd(psmouse, priv->mode))
 272                 return -1;
 273
 274         return 0;
 275 }
 276
 277 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 278 {
 279         struct synaptics_data *priv = psmouse->private;
 280
 281         if (rate >= 80) {
 282                 priv->mode |= SYN_BIT_HIGH_RATE;
 283                 psmouse->rate = 80;
 284         } else {
 285                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 286                 psmouse->rate = 40;
 287         }
 288
 289         synaptics_mode_cmd(psmouse, priv->mode);
 290 }
 291
 292 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 293 {
 294         static unsigned char param = 0xc8;
 295         struct synaptics_data *priv = psmouse->private;
 296
 297         if (!SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 298                 return 0;
 299
 300         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 301                 return -1;
 302         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 303                 return -1;
 304
 305         /* Advanced gesture mode also sends multi finger data */
 306         priv->capabilities |= BIT(1);
 307
 308         return 0;
 309 }
 310
 311 /*****************************************************************************
 312  *      Synaptics pass-through PS/2 port support
 313  ****************************************************************************/
 314 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 315 {
 316         struct psmouse *parent = serio_get_drvdata(serio->parent);
 317         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 318
 319         if (psmouse_sliced_command(parent, c))
 320                 return -1;
 321         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 322                 return -1;
 323         return 0;
 324 }
 325
 326 static int synaptics_pt_start(struct serio *serio)
 327 {
 328         struct psmouse *parent = serio_get_drvdata(serio->parent);
 329         struct synaptics_data *priv = parent->private;
 330
 331         serio_pause_rx(parent->ps2dev.serio);
 332         priv->pt_port = serio;
 333         serio_continue_rx(parent->ps2dev.serio);
 334
 335         return 0;
 336 }
 337
 338 static void synaptics_pt_stop(struct serio *serio)
 339 {
 340         struct psmouse *parent = serio_get_drvdata(serio->parent);
 341         struct synaptics_data *priv = parent->private;
 342
 343         serio_pause_rx(parent->ps2dev.serio);
 344         priv->pt_port = NULL;
 345         serio_continue_rx(parent->ps2dev.serio);
 346 }
 347
 348 static int synaptics_is_pt_packet(unsigned char *buf)
 349 {
 350         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 351 }
 352
 353 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 354 {
 355         struct psmouse *child = serio_get_drvdata(ptport);
 356
 357         if (child && child->state == PSMOUSE_ACTIVATED) {
 358                 serio_interrupt(ptport, packet[1], 0);
 359                 serio_interrupt(ptport, packet[4], 0);
 360                 serio_interrupt(ptport, packet[5], 0);
 361                 if (child->pktsize == 4)
 362                         serio_interrupt(ptport, packet[2], 0);
 363         } else
 364                 serio_interrupt(ptport, packet[1], 0);
 365 }
 366
 367 static void synaptics_pt_activate(struct psmouse *psmouse)
 368 {
 369         struct synaptics_data *priv = psmouse->private;
 370         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 371
 372         /* adjust the touchpad to child's choice of protocol */
 373         if (child) {
 374                 if (child->pktsize == 4)
 375                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 376                 else
 377                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 378
 379                 if (synaptics_mode_cmd(psmouse, priv->mode))
 380                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 381         }
 382 }
 383
 384 static void synaptics_pt_create(struct psmouse *psmouse)
 385 {
 386         struct serio *serio;
 387
 388         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 389         if (!serio) {
 390                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 391                 return;
 392         }
 393
 394         serio->id.type = SERIO_PS_PSTHRU;
 395         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 396         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 397         serio->write = synaptics_pt_write;
 398         serio->start = synaptics_pt_start;
 399         serio->stop = synaptics_pt_stop;
 400         serio->parent = psmouse->ps2dev.serio;
 401
 402         psmouse->pt_activate = synaptics_pt_activate;
 403
 404         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 405         serio_register_port(serio);
 406 }
 407
 408 /*****************************************************************************
 409  *      Functions to interpret the absolute mode packets
 410  ****************************************************************************/
 411
 412 static int synaptics_parse_hw_state(const unsigned char buf[],
 413                                     struct synaptics_data *priv,
 414                                     struct synaptics_hw_state *hw)
 415 {
 416         memset(hw, 0, sizeof(struct synaptics_hw_state));
 417
 418         if (SYN_MODEL_NEWABS(priv->model_id)) {
 419                 hw->w = (((buf[0] & 0x30) >> 2) |
 420                          ((buf[0] & 0x04) >> 1) |
 421                          ((buf[3] & 0x04) >> 2));
 422
 423                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 424                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 425
 426                 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 427                         /*
 428                          * Clickpad's button is transmitted as middle button,
 429                          * however, since it is primary button, we will report
 430                          * it as BTN_LEFT.
 431                          */
 432                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 433
 434                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 435                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 436                         if (hw->w == 2)
 437                                 hw->scroll = (signed char)(buf[1]);
 438                 }
 439
 440                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 441                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 442                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 443                 }
 444
 445                 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) && hw->w == 2) {
 446                         /* Gesture packet: (x, y, z) at half resolution */
 447                         priv->mt.x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 448                         priv->mt.y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 449                         priv->mt.z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 450                         return 1;
 451                 }
 452
 453                 hw->x = (((buf[3] & 0x10) << 8) |
 454                          ((buf[1] & 0x0f) << 8) |
 455                          buf[4]);
 456                 hw->y = (((buf[3] & 0x20) << 7) |
 457                          ((buf[1] & 0xf0) << 4) |
 458                          buf[5]);
 459                 hw->z = buf[2];
 460
 461                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 462                     ((buf[0] ^ buf[3]) & 0x02)) {
 463                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 464                         default:
 465                                 /*
 466                                  * if nExtBtn is greater than 8 it should be
 467                                  * considered invalid and treated as 0
 468                                  */
 469                                 break;
 470                         case 8:
 471                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 472                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 473                         case 6:
 474                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 475                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 476                         case 4:
 477                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 478                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 479                         case 2:
 480                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 481                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 482                         }
 483                 }
 484         } else {
 485                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 486                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 487
 488                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 489                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 490
 491                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 492                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 493         }
 494
 495         return 0;
 496 }
 497
 498 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 499                                           bool active, int x, int y)
 500 {
 501         input_mt_slot(dev, slot);
 502         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 503         if (active) {
 504                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 505                 input_report_abs(dev, ABS_MT_POSITION_Y,
 506                                  YMAX_NOMINAL + YMIN_NOMINAL - y);
 507         }
 508 }
 509
 510 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 511                                           const struct synaptics_hw_state *a,
 512                                           const struct synaptics_hw_state *b,
 513                                           int num_fingers)
 514 {
 515         if (num_fingers >= 2) {
 516                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 517                                               min(a->y, b->y));
 518                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 519                                               max(a->y, b->y));
 520         } else if (num_fingers == 1) {
 521                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 522                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 523         } else {
 524                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 525                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 526         }
 527 }
 528
 529 /*
 530  *  called for each full received packet from the touchpad
 531  */
 532 static void synaptics_process_packet(struct psmouse *psmouse)
 533 {
 534         struct input_dev *dev = psmouse->dev;
 535         struct synaptics_data *priv = psmouse->private;
 536         struct synaptics_hw_state hw;
 537         int num_fingers;
 538         int finger_width;
 539         int i;
 540
 541         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 542                 return;
 543
 544         if (hw.scroll) {
 545                 priv->scroll += hw.scroll;
 546
 547                 while (priv->scroll >= 4) {
 548                         input_report_key(dev, BTN_BACK, !hw.down);
 549                         input_sync(dev);
 550                         input_report_key(dev, BTN_BACK, hw.down);
 551                         input_sync(dev);
 552                         priv->scroll -= 4;
 553                 }
 554                 while (priv->scroll <= -4) {
 555                         input_report_key(dev, BTN_FORWARD, !hw.up);
 556                         input_sync(dev);
 557                         input_report_key(dev, BTN_FORWARD, hw.up);
 558                         input_sync(dev);
 559                         priv->scroll += 4;
 560                 }
 561                 return;
 562         }
 563
 564         if (hw.z > 0 && hw.x > 1) {
 565                 num_fingers = 1;
 566                 finger_width = 5;
 567                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 568                         switch (hw.w) {
 569                         case 0 ... 1:
 570                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 571                                         num_fingers = hw.w + 2;
 572                                 break;
 573                         case 2:
 574                                 if (SYN_MODEL_PEN(priv->model_id))
 575                                         ;   /* Nothing, treat a pen as a single finger */
 576                                 break;
 577                         case 4 ... 15:
 578                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 579                                         finger_width = hw.w;
 580                                 break;
 581                         }
 582                 }
 583         } else {
 584                 num_fingers = 0;
 585                 finger_width = 0;
 586         }
 587
 588         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 589                 synaptics_report_semi_mt_data(dev, &hw, &priv->mt, num_fingers);
 590
 591         /* Post events
 592          * BTN_TOUCH has to be first as mousedev relies on it when doing
 593          * absolute -> relative conversion
 594          */
 595         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 596         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 597
 598         if (num_fingers > 0) {
 599                 input_report_abs(dev, ABS_X, hw.x);
 600                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 601         }
 602         input_report_abs(dev, ABS_PRESSURE, hw.z);
 603
 604         if (SYN_CAP_PALMDETECT(priv->capabilities))
 605                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 606
 607         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 608         input_report_key(dev, BTN_LEFT, hw.left);
 609         input_report_key(dev, BTN_RIGHT, hw.right);
 610
 611         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 612                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 613                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 614         }
 615
 616         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 617                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 618
 619         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 620                 input_report_key(dev, BTN_FORWARD, hw.up);
 621                 input_report_key(dev, BTN_BACK, hw.down);
 622         }
 623
 624         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 625                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 626
 627         input_sync(dev);
 628 }
 629
 630 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 631 {
 632         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 633         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 634         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 635         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 636         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 637
 638         if (idx < 0 || idx > 4)
 639                 return 0;
 640
 641         switch (pkt_type) {
 642
 643         case SYN_NEWABS:
 644         case SYN_NEWABS_RELAXED:
 645                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 646
 647         case SYN_NEWABS_STRICT:
 648                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 649
 650         case SYN_OLDABS:
 651                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 652
 653         default:
 654                 printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 655                 return 0;
 656         }
 657 }
 658
 659 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 660 {
 661         int i;
 662
 663         for (i = 0; i < 5; i++)
 664                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 665                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 666                         return SYN_NEWABS_RELAXED;
 667                 }
 668
 669         return SYN_NEWABS_STRICT;
 670 }
 671
 672 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 673 {
 674         struct synaptics_data *priv = psmouse->private;
 675
 676         if (psmouse->pktcnt >= 6) { /* Full packet received */
 677                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 678                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 679
 680                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
 681                     synaptics_is_pt_packet(psmouse->packet)) {
 682                         if (priv->pt_port)
 683                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
 684                 } else
 685                         synaptics_process_packet(psmouse);
 686
 687                 return PSMOUSE_FULL_PACKET;
 688         }
 689
 690         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 691                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 692 }
 693
 694 /*****************************************************************************
 695  *      Driver initialization/cleanup functions
 696  ****************************************************************************/
 697 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 698 {
 699         int i;
 700         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
 701                         SYN_REDUCED_FILTER_FUZZ : 0;
 702
 703         __set_bit(INPUT_PROP_POINTER, dev->propbit);
 704
 705         __set_bit(EV_ABS, dev->evbit);
 706         input_set_abs_params(dev, ABS_X,
 707                              priv->x_min ?: XMIN_NOMINAL,
 708                              priv->x_max ?: XMAX_NOMINAL,
 709                              fuzz, 0);
 710         input_set_abs_params(dev, ABS_Y,
 711                              priv->y_min ?: YMIN_NOMINAL,
 712                              priv->y_max ?: YMAX_NOMINAL,
 713                              fuzz, 0);
 714         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 715
 716         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
 717                 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
 718                 input_mt_init_slots(dev, 2);
 719                 input_set_abs_params(dev, ABS_MT_POSITION_X,
 720                                      priv->x_min ?: XMIN_NOMINAL,
 721                                      priv->x_max ?: XMAX_NOMINAL,
 722                                      fuzz, 0);
 723                 input_set_abs_params(dev, ABS_MT_POSITION_Y,
 724                                      priv->y_min ?: YMIN_NOMINAL,
 725                                      priv->y_max ?: YMAX_NOMINAL,
 726                                      fuzz, 0);
 727
 728                 input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res);
 729                 input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res);
 730         }
 731
 732         if (SYN_CAP_PALMDETECT(priv->capabilities))
 733                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
 734
 735         __set_bit(EV_KEY, dev->evbit);
 736         __set_bit(BTN_TOUCH, dev->keybit);
 737         __set_bit(BTN_TOOL_FINGER, dev->keybit);
 738         __set_bit(BTN_LEFT, dev->keybit);
 739         __set_bit(BTN_RIGHT, dev->keybit);
 740
 741         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 742                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 743                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 744         }
 745
 746         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 747                 __set_bit(BTN_MIDDLE, dev->keybit);
 748
 749         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 750             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 751                 __set_bit(BTN_FORWARD, dev->keybit);
 752                 __set_bit(BTN_BACK, dev->keybit);
 753         }
 754
 755         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 756                 __set_bit(BTN_0 + i, dev->keybit);
 757
 758         __clear_bit(EV_REL, dev->evbit);
 759         __clear_bit(REL_X, dev->relbit);
 760         __clear_bit(REL_Y, dev->relbit);
 761
 762         input_abs_set_res(dev, ABS_X, priv->x_res);
 763         input_abs_set_res(dev, ABS_Y, priv->y_res);
 764
 765         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 766                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
 767                 /* Clickpads report only left button */
 768                 __clear_bit(BTN_RIGHT, dev->keybit);
 769                 __clear_bit(BTN_MIDDLE, dev->keybit);
 770         }
 771 }
 772
 773 static void synaptics_disconnect(struct psmouse *psmouse)
 774 {
 775         synaptics_reset(psmouse);
 776         kfree(psmouse->private);
 777         psmouse->private = NULL;
 778 }
 779
 780 static int synaptics_reconnect(struct psmouse *psmouse)
 781 {
 782         struct synaptics_data *priv = psmouse->private;
 783         struct synaptics_data old_priv = *priv;
 784         int retry = 0;
 785         int error;
 786
 787         do {
 788                 psmouse_reset(psmouse);
 789                 error = synaptics_detect(psmouse, 0);
 790         } while (error && ++retry < 3);
 791
 792         if (error)
 793                 return -1;
 794
 795         if (retry > 1)
 796                 printk(KERN_DEBUG "Synaptics reconnected after %d tries\n",
 797                         retry);
 798
 799         if (synaptics_query_hardware(psmouse)) {
 800                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 801                 return -1;
 802         }
 803
 804         if (synaptics_set_absolute_mode(psmouse)) {
 805                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 806                 return -1;
 807         }
 808
 809         if (synaptics_set_advanced_gesture_mode(psmouse)) {
 810                 printk(KERN_ERR "Advanced gesture mode reconnect failed.\n");
 811                 return -1;
 812         }
 813
 814         if (old_priv.identity != priv->identity ||
 815             old_priv.model_id != priv->model_id ||
 816             old_priv.capabilities != priv->capabilities ||
 817             old_priv.ext_cap != priv->ext_cap) {
 818                 printk(KERN_ERR "Synaptics hardware appears to be different: "
 819                         "id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
 820                         old_priv.identity, priv->identity,
 821                         old_priv.model_id, priv->model_id,
 822                         old_priv.capabilities, priv->capabilities,
 823                         old_priv.ext_cap, priv->ext_cap);
 824                 return -1;
 825         }
 826
 827         return 0;
 828 }
 829
 830 static bool impaired_toshiba_kbc;
 831
 832 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
 833 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
 834         {
 835                 /* Toshiba Satellite */
 836                 .matches = {
 837                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 838                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 839                 },
 840         },
 841         {
 842                 /* Toshiba Dynabook */
 843                 .matches = {
 844                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 845                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 846                 },
 847         },
 848         {
 849                 /* Toshiba Portege M300 */
 850                 .matches = {
 851                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 852                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 853                 },
 854
 855         },
 856         {
 857                 /* Toshiba Portege M300 */
 858                 .matches = {
 859                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 860                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
 861                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
 862                 },
 863
 864         },
 865 #endif
 866         { }
 867 };
 868
 869 static bool broken_olpc_ec;
 870
 871 static const struct dmi_system_id __initconst olpc_dmi_table[] = {
 872 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
 873         {
 874                 /* OLPC XO-1 or XO-1.5 */
 875                 .matches = {
 876                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
 877                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
 878                 },
 879         },
 880 #endif
 881         { }
 882 };
 883
 884 void __init synaptics_module_init(void)
 885 {
 886         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
 887         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
 888 }
 889
 890 int synaptics_init(struct psmouse *psmouse)
 891 {
 892         struct synaptics_data *priv;
 893
 894         /*
 895          * The OLPC XO has issues with Synaptics' absolute mode; similarly to
 896          * the HGPK, it quickly degrades and the hardware becomes jumpy and
 897          * overly sensitive.  Not only that, but the constant packet spew
 898          * (even at a lowered 40pps rate) overloads the EC such that key
 899          * presses on the keyboard are missed.  Given all of that, don't
 900          * even attempt to use Synaptics mode.  Relative mode seems to work
 901          * just fine.
 902          */
 903         if (broken_olpc_ec) {
 904                 printk(KERN_INFO "synaptics: OLPC XO detected, not enabling Synaptics protocol.\n");
 905                 return -ENODEV;
 906         }
 907
 908         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 909         if (!priv)
 910                 return -ENOMEM;
 911
 912         psmouse_reset(psmouse);
 913
 914         if (synaptics_query_hardware(psmouse)) {
 915                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 916                 goto init_fail;
 917         }
 918
 919         if (synaptics_set_absolute_mode(psmouse)) {
 920                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 921                 goto init_fail;
 922         }
 923
 924         if (synaptics_set_advanced_gesture_mode(psmouse)) {
 925                 printk(KERN_ERR "Advanced gesture mode init failed.\n");
 926                 goto init_fail;
 927         }
 928
 929         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 930
 931         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
 932                 SYN_ID_MODEL(priv->identity),
 933                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 934                 priv->model_id, priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
 935
 936         set_input_params(psmouse->dev, priv);
 937
 938         /*
 939          * Encode touchpad model so that it can be used to set
 940          * input device->id.version and be visible to userspace.
 941          * Because version is __u16 we have to drop something.
 942          * Hardware info bits seem to be good candidates as they
 943          * are documented to be for Synaptics corp. internal use.
 944          */
 945         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
 946                           (priv->model_id & 0x000000ff);
 947
 948         psmouse->protocol_handler = synaptics_process_byte;
 949         psmouse->set_rate = synaptics_set_rate;
 950         psmouse->disconnect = synaptics_disconnect;
 951         psmouse->reconnect = synaptics_reconnect;
 952         psmouse->cleanup = synaptics_reset;
 953         psmouse->pktsize = 6;
 954         /* Synaptics can usually stay in sync without extra help */
 955         psmouse->resync_time = 0;
 956
 957         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 958                 synaptics_pt_create(psmouse);
 959
 960         /*
 961          * Toshiba's KBC seems to have trouble handling data from
 962          * Synaptics at full rate.  Switch to a lower rate (roughly
 963          * the same rate as a standard PS/2 mouse).
 964          */
 965         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
 966                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 967                         dmi_get_system_info(DMI_PRODUCT_NAME));
 968                 psmouse->rate = 40;
 969         }
 970
 971         return 0;
 972
 973  init_fail:
 974         kfree(priv);
 975         return -1;
 976 }
 977
 978 bool synaptics_supported(void)
 979 {
 980         return true;
 981 }
 982
 983 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
 984
 985 void __init synaptics_module_init(void)
 986 {
 987 }
 988
 989 int synaptics_init(struct psmouse *psmouse)
 990 {
 991         return -ENOSYS;
 992 }
 993
 994 bool synaptics_supported(void)
 995 {
 996         return false;
 997 }
 998
 999 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */