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