Pileus Git - ~andy/linux/blob - 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  * Synaptics touchpads report the y coordinate from bottom to top, which is
  49  * opposite from what userspace expects.
  50  * This function is used to invert y before reporting.
  51  */
  52 static int synaptics_invert_y(int y)
  53 {
  54         return YMAX_NOMINAL + YMIN_NOMINAL - y;
  55 }
  56
  57
  58 /*****************************************************************************
  59  *      Stuff we need even when we do not want native Synaptics support
  60  ****************************************************************************/
  61
  62 /*
  63  * Set the synaptics touchpad mode byte by special commands
  64  */
  65 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  66 {
  67         unsigned char param[1];
  68
  69         if (psmouse_sliced_command(psmouse, mode))
  70                 return -1;
  71         param[0] = SYN_PS_SET_MODE2;
  72         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  73                 return -1;
  74         return 0;
  75 }
  76
  77 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  78 {
  79         struct ps2dev *ps2dev = &psmouse->ps2dev;
  80         unsigned char param[4];
  81
  82         param[0] = 0;
  83
  84         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  85         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  86         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  87         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  88         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
  89
  90         if (param[1] != 0x47)
  91                 return -ENODEV;
  92
  93         if (set_properties) {
  94                 psmouse->vendor = "Synaptics";
  95                 psmouse->name = "TouchPad";
  96         }
  97
  98         return 0;
  99 }
 100
 101 void synaptics_reset(struct psmouse *psmouse)
 102 {
 103         /* reset touchpad back to relative mode, gestures enabled */
 104         synaptics_mode_cmd(psmouse, 0);
 105 }
 106
 107 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
 108
 109 /*****************************************************************************
 110  *      Synaptics communications functions
 111  ****************************************************************************/
 112
 113 /*
 114  * Send a command to the synpatics touchpad by special commands
 115  */
 116 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 117 {
 118         if (psmouse_sliced_command(psmouse, c))
 119                 return -1;
 120         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 121                 return -1;
 122         return 0;
 123 }
 124
 125 /*
 126  * Read the model-id bytes from the touchpad
 127  * see also SYN_MODEL_* macros
 128  */
 129 static int synaptics_model_id(struct psmouse *psmouse)
 130 {
 131         struct synaptics_data *priv = psmouse->private;
 132         unsigned char mi[3];
 133
 134         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 135                 return -1;
 136         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 137         return 0;
 138 }
 139
 140 /*
 141  * Read the capability-bits from the touchpad
 142  * see also the SYN_CAP_* macros
 143  */
 144 static int synaptics_capability(struct psmouse *psmouse)
 145 {
 146         struct synaptics_data *priv = psmouse->private;
 147         unsigned char cap[3];
 148
 149         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 150                 return -1;
 151         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 152         priv->ext_cap = priv->ext_cap_0c = 0;
 153
 154         /*
 155          * Older firmwares had submodel ID fixed to 0x47
 156          */
 157         if (SYN_ID_FULL(priv->identity) < 0x705 &&
 158             SYN_CAP_SUBMODEL_ID(priv->capabilities) != 0x47) {
 159                 return -1;
 160         }
 161
 162         /*
 163          * Unless capExtended is set the rest of the flags should be ignored
 164          */
 165         if (!SYN_CAP_EXTENDED(priv->capabilities))
 166                 priv->capabilities = 0;
 167
 168         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 169                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 170                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
 171                                " but I'm not able to read them.\n");
 172                 } else {
 173                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 174
 175                         /*
 176                          * if nExtBtn is greater than 8 it should be considered
 177                          * invalid and treated as 0
 178                          */
 179                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 180                                 priv->ext_cap &= 0xff0fff;
 181                 }
 182         }
 183
 184         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 4) {
 185                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB_0C, cap)) {
 186                         printk(KERN_ERR "Synaptics claims to have extended capability 0x0c,"
 187                                " but I'm not able to read it.\n");
 188                 } else {
 189                         priv->ext_cap_0c = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 190                 }
 191         }
 192
 193         return 0;
 194 }
 195
 196 /*
 197  * Identify Touchpad
 198  * See also the SYN_ID_* macros
 199  */
 200 static int synaptics_identify(struct psmouse *psmouse)
 201 {
 202         struct synaptics_data *priv = psmouse->private;
 203         unsigned char id[3];
 204
 205         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 206                 return -1;
 207         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 208         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 209                 return 0;
 210         return -1;
 211 }
 212
 213 /*
 214  * Read touchpad resolution and maximum reported coordinates
 215  * Resolution is left zero if touchpad does not support the query
 216  */
 217 static int synaptics_resolution(struct psmouse *psmouse)
 218 {
 219         struct synaptics_data *priv = psmouse->private;
 220         unsigned char resp[3];
 221
 222         if (SYN_ID_MAJOR(priv->identity) < 4)
 223                 return 0;
 224
 225         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, resp) == 0) {
 226                 if (resp[0] != 0 && (resp[1] & 0x80) && resp[2] != 0) {
 227                         priv->x_res = resp[0]; /* x resolution in units/mm */
 228                         priv->y_res = resp[2]; /* y resolution in units/mm */
 229                 }
 230         }
 231
 232         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 5 &&
 233             SYN_CAP_MAX_DIMENSIONS(priv->ext_cap_0c)) {
 234                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MAX_COORDS, resp)) {
 235                         printk(KERN_ERR "Synaptics claims to have max coordinates"
 236                                " query, but I'm not able to read it.\n");
 237                 } else {
 238                         priv->x_max = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 239                         priv->y_max = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 240                 }
 241         }
 242
 243         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 7 &&
 244             SYN_CAP_MIN_DIMENSIONS(priv->ext_cap_0c)) {
 245                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_MIN_COORDS, resp)) {
 246                         printk(KERN_ERR "Synaptics claims to have min coordinates"
 247                                " query, but I'm not able to read it.\n");
 248                 } else {
 249                         priv->x_min = (resp[0] << 5) | ((resp[1] & 0x0f) << 1);
 250                         priv->y_min = (resp[2] << 5) | ((resp[1] & 0xf0) >> 3);
 251                 }
 252         }
 253
 254         return 0;
 255 }
 256
 257 static int synaptics_query_hardware(struct psmouse *psmouse)
 258 {
 259         if (synaptics_identify(psmouse))
 260                 return -1;
 261         if (synaptics_model_id(psmouse))
 262                 return -1;
 263         if (synaptics_capability(psmouse))
 264                 return -1;
 265         if (synaptics_resolution(psmouse))
 266                 return -1;
 267
 268         return 0;
 269 }
 270
 271 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 272 {
 273         struct synaptics_data *priv = psmouse->private;
 274
 275         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 276         if (SYN_ID_MAJOR(priv->identity) >= 4)
 277                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 278         if (SYN_CAP_EXTENDED(priv->capabilities))
 279                 priv->mode |= SYN_BIT_W_MODE;
 280
 281         if (synaptics_mode_cmd(psmouse, priv->mode))
 282                 return -1;
 283
 284         return 0;
 285 }
 286
 287 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 288 {
 289         struct synaptics_data *priv = psmouse->private;
 290
 291         if (rate >= 80) {
 292                 priv->mode |= SYN_BIT_HIGH_RATE;
 293                 psmouse->rate = 80;
 294         } else {
 295                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 296                 psmouse->rate = 40;
 297         }
 298
 299         synaptics_mode_cmd(psmouse, priv->mode);
 300 }
 301
 302 static int synaptics_set_advanced_gesture_mode(struct psmouse *psmouse)
 303 {
 304         static unsigned char param = 0xc8;
 305         struct synaptics_data *priv = psmouse->private;
 306
 307         if (!SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 308                 return 0;
 309
 310         if (psmouse_sliced_command(psmouse, SYN_QUE_MODEL))
 311                 return -1;
 312         if (ps2_command(&psmouse->ps2dev, &param, PSMOUSE_CMD_SETRATE))
 313                 return -1;
 314
 315         /* Advanced gesture mode also sends multi finger data */
 316         priv->capabilities |= BIT(1);
 317
 318         return 0;
 319 }
 320
 321 /*****************************************************************************
 322  *      Synaptics pass-through PS/2 port support
 323  ****************************************************************************/
 324 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 325 {
 326         struct psmouse *parent = serio_get_drvdata(serio->parent);
 327         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 328
 329         if (psmouse_sliced_command(parent, c))
 330                 return -1;
 331         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 332                 return -1;
 333         return 0;
 334 }
 335
 336 static int synaptics_pt_start(struct serio *serio)
 337 {
 338         struct psmouse *parent = serio_get_drvdata(serio->parent);
 339         struct synaptics_data *priv = parent->private;
 340
 341         serio_pause_rx(parent->ps2dev.serio);
 342         priv->pt_port = serio;
 343         serio_continue_rx(parent->ps2dev.serio);
 344
 345         return 0;
 346 }
 347
 348 static void synaptics_pt_stop(struct serio *serio)
 349 {
 350         struct psmouse *parent = serio_get_drvdata(serio->parent);
 351         struct synaptics_data *priv = parent->private;
 352
 353         serio_pause_rx(parent->ps2dev.serio);
 354         priv->pt_port = NULL;
 355         serio_continue_rx(parent->ps2dev.serio);
 356 }
 357
 358 static int synaptics_is_pt_packet(unsigned char *buf)
 359 {
 360         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 361 }
 362
 363 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 364 {
 365         struct psmouse *child = serio_get_drvdata(ptport);
 366
 367         if (child && child->state == PSMOUSE_ACTIVATED) {
 368                 serio_interrupt(ptport, packet[1], 0);
 369                 serio_interrupt(ptport, packet[4], 0);
 370                 serio_interrupt(ptport, packet[5], 0);
 371                 if (child->pktsize == 4)
 372                         serio_interrupt(ptport, packet[2], 0);
 373         } else
 374                 serio_interrupt(ptport, packet[1], 0);
 375 }
 376
 377 static void synaptics_pt_activate(struct psmouse *psmouse)
 378 {
 379         struct synaptics_data *priv = psmouse->private;
 380         struct psmouse *child = serio_get_drvdata(priv->pt_port);
 381
 382         /* adjust the touchpad to child's choice of protocol */
 383         if (child) {
 384                 if (child->pktsize == 4)
 385                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 386                 else
 387                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 388
 389                 if (synaptics_mode_cmd(psmouse, priv->mode))
 390                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 391         }
 392 }
 393
 394 static void synaptics_pt_create(struct psmouse *psmouse)
 395 {
 396         struct serio *serio;
 397
 398         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 399         if (!serio) {
 400                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 401                 return;
 402         }
 403
 404         serio->id.type = SERIO_PS_PSTHRU;
 405         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 406         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 407         serio->write = synaptics_pt_write;
 408         serio->start = synaptics_pt_start;
 409         serio->stop = synaptics_pt_stop;
 410         serio->parent = psmouse->ps2dev.serio;
 411
 412         psmouse->pt_activate = synaptics_pt_activate;
 413
 414         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 415         serio_register_port(serio);
 416 }
 417
 418 /*****************************************************************************
 419  *      Functions to interpret the absolute mode packets
 420  ****************************************************************************/
 421
 422 static void synaptics_parse_agm(const unsigned char buf[],
 423                                 struct synaptics_data *priv)
 424 {
 425         struct synaptics_hw_state *agm = &priv->agm;
 426
 427         /* Gesture packet: (x, y, z) at half resolution */
 428         agm->x = (((buf[4] & 0x0f) << 8) | buf[1]) << 1;
 429         agm->y = (((buf[4] & 0xf0) << 4) | buf[2]) << 1;
 430         agm->z = ((buf[3] & 0x30) | (buf[5] & 0x0f)) << 1;
 431 }
 432
 433 static int synaptics_parse_hw_state(const unsigned char buf[],
 434                                     struct synaptics_data *priv,
 435                                     struct synaptics_hw_state *hw)
 436 {
 437         memset(hw, 0, sizeof(struct synaptics_hw_state));
 438
 439         if (SYN_MODEL_NEWABS(priv->model_id)) {
 440                 hw->w = (((buf[0] & 0x30) >> 2) |
 441                          ((buf[0] & 0x04) >> 1) |
 442                          ((buf[3] & 0x04) >> 2));
 443
 444                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 445                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 446
 447                 if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 448                         /*
 449                          * Clickpad's button is transmitted as middle button,
 450                          * however, since it is primary button, we will report
 451                          * it as BTN_LEFT.
 452                          */
 453                         hw->left = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 454
 455                 } else if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 456                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 457                         if (hw->w == 2)
 458                                 hw->scroll = (signed char)(buf[1]);
 459                 }
 460
 461                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 462                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 463                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 464                 }
 465
 466                 if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c) && hw->w == 2) {
 467                         synaptics_parse_agm(buf, priv);
 468                         return 1;
 469                 }
 470
 471                 hw->x = (((buf[3] & 0x10) << 8) |
 472                          ((buf[1] & 0x0f) << 8) |
 473                          buf[4]);
 474                 hw->y = (((buf[3] & 0x20) << 7) |
 475                          ((buf[1] & 0xf0) << 4) |
 476                          buf[5]);
 477                 hw->z = buf[2];
 478
 479                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 480                     ((buf[0] ^ buf[3]) & 0x02)) {
 481                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 482                         default:
 483                                 /*
 484                                  * if nExtBtn is greater than 8 it should be
 485                                  * considered invalid and treated as 0
 486                                  */
 487                                 break;
 488                         case 8:
 489                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 490                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 491                         case 6:
 492                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 493                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 494                         case 4:
 495                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 496                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 497                         case 2:
 498                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 499                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 500                         }
 501                 }
 502         } else {
 503                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 504                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 505
 506                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 507                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 508
 509                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 510                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 511         }
 512
 513         return 0;
 514 }
 515
 516 static void synaptics_report_semi_mt_slot(struct input_dev *dev, int slot,
 517                                           bool active, int x, int y)
 518 {
 519         input_mt_slot(dev, slot);
 520         input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
 521         if (active) {
 522                 input_report_abs(dev, ABS_MT_POSITION_X, x);
 523                 input_report_abs(dev, ABS_MT_POSITION_Y, synaptics_invert_y(y));
 524         }
 525 }
 526
 527 static void synaptics_report_semi_mt_data(struct input_dev *dev,
 528                                           const struct synaptics_hw_state *a,
 529                                           const struct synaptics_hw_state *b,
 530                                           int num_fingers)
 531 {
 532         if (num_fingers >= 2) {
 533                 synaptics_report_semi_mt_slot(dev, 0, true, min(a->x, b->x),
 534                                               min(a->y, b->y));
 535                 synaptics_report_semi_mt_slot(dev, 1, true, max(a->x, b->x),
 536                                               max(a->y, b->y));
 537         } else if (num_fingers == 1) {
 538                 synaptics_report_semi_mt_slot(dev, 0, true, a->x, a->y);
 539                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 540         } else {
 541                 synaptics_report_semi_mt_slot(dev, 0, false, 0, 0);
 542                 synaptics_report_semi_mt_slot(dev, 1, false, 0, 0);
 543         }
 544 }
 545
 546 /*
 547  *  called for each full received packet from the touchpad
 548  */
 549 static void synaptics_process_packet(struct psmouse *psmouse)
 550 {
 551         struct input_dev *dev = psmouse->dev;
 552         struct synaptics_data *priv = psmouse->private;
 553         struct synaptics_hw_state hw;
 554         int num_fingers;
 555         int finger_width;
 556         int i;
 557
 558         if (synaptics_parse_hw_state(psmouse->packet, priv, &hw))
 559                 return;
 560
 561         if (hw.scroll) {
 562                 priv->scroll += hw.scroll;
 563
 564                 while (priv->scroll >= 4) {
 565                         input_report_key(dev, BTN_BACK, !hw.down);
 566                         input_sync(dev);
 567                         input_report_key(dev, BTN_BACK, hw.down);
 568                         input_sync(dev);
 569                         priv->scroll -= 4;
 570                 }
 571                 while (priv->scroll <= -4) {
 572                         input_report_key(dev, BTN_FORWARD, !hw.up);
 573                         input_sync(dev);
 574                         input_report_key(dev, BTN_FORWARD, hw.up);
 575                         input_sync(dev);
 576                         priv->scroll += 4;
 577                 }
 578                 return;
 579         }
 580
 581         if (hw.z > 0 && hw.x > 1) {
 582                 num_fingers = 1;
 583                 finger_width = 5;
 584                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 585                         switch (hw.w) {
 586                         case 0 ... 1:
 587                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 588                                         num_fingers = hw.w + 2;
 589                                 break;
 590                         case 2:
 591                                 if (SYN_MODEL_PEN(priv->model_id))
 592                                         ;   /* Nothing, treat a pen as a single finger */
 593                                 break;
 594                         case 4 ... 15:
 595                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 596                                         finger_width = hw.w;
 597                                 break;
 598                         }
 599                 }
 600         } else {
 601                 num_fingers = 0;
 602                 finger_width = 0;
 603         }
 604
 605         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c))
 606                 synaptics_report_semi_mt_data(dev, &hw, &priv->agm,
 607                                               num_fingers);
 608
 609         /* Post events
 610          * BTN_TOUCH has to be first as mousedev relies on it when doing
 611          * absolute -> relative conversion
 612          */
 613         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 614         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 615
 616         if (num_fingers > 0) {
 617                 input_report_abs(dev, ABS_X, hw.x);
 618                 input_report_abs(dev, ABS_Y, synaptics_invert_y(hw.y));
 619         }
 620         input_report_abs(dev, ABS_PRESSURE, hw.z);
 621
 622         if (SYN_CAP_PALMDETECT(priv->capabilities))
 623                 input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 624
 625         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 626         input_report_key(dev, BTN_LEFT, hw.left);
 627         input_report_key(dev, BTN_RIGHT, hw.right);
 628
 629         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 630                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 631                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 632         }
 633
 634         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 635                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 636
 637         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 638                 input_report_key(dev, BTN_FORWARD, hw.up);
 639                 input_report_key(dev, BTN_BACK, hw.down);
 640         }
 641
 642         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 643                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 644
 645         input_sync(dev);
 646 }
 647
 648 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 649 {
 650         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 651         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 652         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 653         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 654         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 655
 656         if (idx < 0 || idx > 4)
 657                 return 0;
 658
 659         switch (pkt_type) {
 660
 661         case SYN_NEWABS:
 662         case SYN_NEWABS_RELAXED:
 663                 return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 664
 665         case SYN_NEWABS_STRICT:
 666                 return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 667
 668         case SYN_OLDABS:
 669                 return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 670
 671         default:
 672                 printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 673                 return 0;
 674         }
 675 }
 676
 677 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 678 {
 679         int i;
 680
 681         for (i = 0; i < 5; i++)
 682                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 683                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 684                         return SYN_NEWABS_RELAXED;
 685                 }
 686
 687         return SYN_NEWABS_STRICT;
 688 }
 689
 690 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 691 {
 692         struct synaptics_data *priv = psmouse->private;
 693
 694         if (psmouse->pktcnt >= 6) { /* Full packet received */
 695                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 696                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 697
 698                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) &&
 699                     synaptics_is_pt_packet(psmouse->packet)) {
 700                         if (priv->pt_port)
 701                                 synaptics_pass_pt_packet(priv->pt_port, psmouse->packet);
 702                 } else
 703                         synaptics_process_packet(psmouse);
 704
 705                 return PSMOUSE_FULL_PACKET;
 706         }
 707
 708         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 709                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 710 }
 711
 712 /*****************************************************************************
 713  *      Driver initialization/cleanup functions
 714  ****************************************************************************/
 715 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 716 {
 717         int i;
 718         int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ?
 719                         SYN_REDUCED_FILTER_FUZZ : 0;
 720
 721         __set_bit(INPUT_PROP_POINTER, dev->propbit);
 722
 723         __set_bit(EV_ABS, dev->evbit);
 724         input_set_abs_params(dev, ABS_X,
 725                              priv->x_min ?: XMIN_NOMINAL,
 726                              priv->x_max ?: XMAX_NOMINAL,
 727                              fuzz, 0);
 728         input_set_abs_params(dev, ABS_Y,
 729                              priv->y_min ?: YMIN_NOMINAL,
 730                              priv->y_max ?: YMAX_NOMINAL,
 731                              fuzz, 0);
 732         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 733
 734         if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) {
 735                 __set_bit(INPUT_PROP_SEMI_MT, dev->propbit);
 736                 input_mt_init_slots(dev, 2);
 737                 input_set_abs_params(dev, ABS_MT_POSITION_X,
 738                                      priv->x_min ?: XMIN_NOMINAL,
 739                                      priv->x_max ?: XMAX_NOMINAL,
 740                                      fuzz, 0);
 741                 input_set_abs_params(dev, ABS_MT_POSITION_Y,
 742                                      priv->y_min ?: YMIN_NOMINAL,
 743                                      priv->y_max ?: YMAX_NOMINAL,
 744                                      fuzz, 0);
 745
 746                 input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res);
 747                 input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res);
 748         }
 749
 750         if (SYN_CAP_PALMDETECT(priv->capabilities))
 751                 input_set_abs_params(dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
 752
 753         __set_bit(EV_KEY, dev->evbit);
 754         __set_bit(BTN_TOUCH, dev->keybit);
 755         __set_bit(BTN_TOOL_FINGER, dev->keybit);
 756         __set_bit(BTN_LEFT, dev->keybit);
 757         __set_bit(BTN_RIGHT, dev->keybit);
 758
 759         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 760                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 761                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 762         }
 763
 764         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 765                 __set_bit(BTN_MIDDLE, dev->keybit);
 766
 767         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 768             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 769                 __set_bit(BTN_FORWARD, dev->keybit);
 770                 __set_bit(BTN_BACK, dev->keybit);
 771         }
 772
 773         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 774                 __set_bit(BTN_0 + i, dev->keybit);
 775
 776         __clear_bit(EV_REL, dev->evbit);
 777         __clear_bit(REL_X, dev->relbit);
 778         __clear_bit(REL_Y, dev->relbit);
 779
 780         input_abs_set_res(dev, ABS_X, priv->x_res);
 781         input_abs_set_res(dev, ABS_Y, priv->y_res);
 782
 783         if (SYN_CAP_CLICKPAD(priv->ext_cap_0c)) {
 784                 __set_bit(INPUT_PROP_BUTTONPAD, dev->propbit);
 785                 /* Clickpads report only left button */
 786                 __clear_bit(BTN_RIGHT, dev->keybit);
 787                 __clear_bit(BTN_MIDDLE, dev->keybit);
 788         }
 789 }
 790
 791 static void synaptics_disconnect(struct psmouse *psmouse)
 792 {
 793         synaptics_reset(psmouse);
 794         kfree(psmouse->private);
 795         psmouse->private = NULL;
 796 }
 797
 798 static int synaptics_reconnect(struct psmouse *psmouse)
 799 {
 800         struct synaptics_data *priv = psmouse->private;
 801         struct synaptics_data old_priv = *priv;
 802         int retry = 0;
 803         int error;
 804
 805         do {
 806                 psmouse_reset(psmouse);
 807                 error = synaptics_detect(psmouse, 0);
 808         } while (error && ++retry < 3);
 809
 810         if (error)
 811                 return -1;
 812
 813         if (retry > 1)
 814                 printk(KERN_DEBUG "Synaptics reconnected after %d tries\n",
 815                         retry);
 816
 817         if (synaptics_query_hardware(psmouse)) {
 818                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 819                 return -1;
 820         }
 821
 822         if (synaptics_set_absolute_mode(psmouse)) {
 823                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 824                 return -1;
 825         }
 826
 827         if (synaptics_set_advanced_gesture_mode(psmouse)) {
 828                 printk(KERN_ERR "Advanced gesture mode reconnect failed.\n");
 829                 return -1;
 830         }
 831
 832         if (old_priv.identity != priv->identity ||
 833             old_priv.model_id != priv->model_id ||
 834             old_priv.capabilities != priv->capabilities ||
 835             old_priv.ext_cap != priv->ext_cap) {
 836                 printk(KERN_ERR "Synaptics hardware appears to be different: "
 837                         "id(%ld-%ld), model(%ld-%ld), caps(%lx-%lx), ext(%lx-%lx).\n",
 838                         old_priv.identity, priv->identity,
 839                         old_priv.model_id, priv->model_id,
 840                         old_priv.capabilities, priv->capabilities,
 841                         old_priv.ext_cap, priv->ext_cap);
 842                 return -1;
 843         }
 844
 845         return 0;
 846 }
 847
 848 static bool impaired_toshiba_kbc;
 849
 850 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
 851 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
 852         {
 853                 /* Toshiba Satellite */
 854                 .matches = {
 855                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 856                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 857                 },
 858         },
 859         {
 860                 /* Toshiba Dynabook */
 861                 .matches = {
 862                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 863                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 864                 },
 865         },
 866         {
 867                 /* Toshiba Portege M300 */
 868                 .matches = {
 869                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 870                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 871                 },
 872
 873         },
 874         {
 875                 /* Toshiba Portege M300 */
 876                 .matches = {
 877                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 878                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
 879                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
 880                 },
 881
 882         },
 883 #endif
 884         { }
 885 };
 886
 887 static bool broken_olpc_ec;
 888
 889 static const struct dmi_system_id __initconst olpc_dmi_table[] = {
 890 #if defined(CONFIG_DMI) && defined(CONFIG_OLPC)
 891         {
 892                 /* OLPC XO-1 or XO-1.5 */
 893                 .matches = {
 894                         DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
 895                         DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
 896                 },
 897         },
 898 #endif
 899         { }
 900 };
 901
 902 void __init synaptics_module_init(void)
 903 {
 904         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
 905         broken_olpc_ec = dmi_check_system(olpc_dmi_table);
 906 }
 907
 908 int synaptics_init(struct psmouse *psmouse)
 909 {
 910         struct synaptics_data *priv;
 911
 912         /*
 913          * The OLPC XO has issues with Synaptics' absolute mode; similarly to
 914          * the HGPK, it quickly degrades and the hardware becomes jumpy and
 915          * overly sensitive.  Not only that, but the constant packet spew
 916          * (even at a lowered 40pps rate) overloads the EC such that key
 917          * presses on the keyboard are missed.  Given all of that, don't
 918          * even attempt to use Synaptics mode.  Relative mode seems to work
 919          * just fine.
 920          */
 921         if (broken_olpc_ec) {
 922                 printk(KERN_INFO "synaptics: OLPC XO detected, not enabling Synaptics protocol.\n");
 923                 return -ENODEV;
 924         }
 925
 926         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 927         if (!priv)
 928                 return -ENOMEM;
 929
 930         psmouse_reset(psmouse);
 931
 932         if (synaptics_query_hardware(psmouse)) {
 933                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 934                 goto init_fail;
 935         }
 936
 937         if (synaptics_set_absolute_mode(psmouse)) {
 938                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 939                 goto init_fail;
 940         }
 941
 942         if (synaptics_set_advanced_gesture_mode(psmouse)) {
 943                 printk(KERN_ERR "Advanced gesture mode init failed.\n");
 944                 goto init_fail;
 945         }
 946
 947         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 948
 949         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx/%#lx\n",
 950                 SYN_ID_MODEL(priv->identity),
 951                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 952                 priv->model_id, priv->capabilities, priv->ext_cap, priv->ext_cap_0c);
 953
 954         set_input_params(psmouse->dev, priv);
 955
 956         /*
 957          * Encode touchpad model so that it can be used to set
 958          * input device->id.version and be visible to userspace.
 959          * Because version is __u16 we have to drop something.
 960          * Hardware info bits seem to be good candidates as they
 961          * are documented to be for Synaptics corp. internal use.
 962          */
 963         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
 964                           (priv->model_id & 0x000000ff);
 965
 966         psmouse->protocol_handler = synaptics_process_byte;
 967         psmouse->set_rate = synaptics_set_rate;
 968         psmouse->disconnect = synaptics_disconnect;
 969         psmouse->reconnect = synaptics_reconnect;
 970         psmouse->cleanup = synaptics_reset;
 971         psmouse->pktsize = 6;
 972         /* Synaptics can usually stay in sync without extra help */
 973         psmouse->resync_time = 0;
 974
 975         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 976                 synaptics_pt_create(psmouse);
 977
 978         /*
 979          * Toshiba's KBC seems to have trouble handling data from
 980          * Synaptics at full rate.  Switch to a lower rate (roughly
 981          * the same rate as a standard PS/2 mouse).
 982          */
 983         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
 984                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 985                         dmi_get_system_info(DMI_PRODUCT_NAME));
 986                 psmouse->rate = 40;
 987         }
 988
 989         return 0;
 990
 991  init_fail:
 992         kfree(priv);
 993         return -1;
 994 }
 995
 996 bool synaptics_supported(void)
 997 {
 998         return true;
 999 }
1000
1001 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
1002
1003 void __init synaptics_module_init(void)
1004 {
1005 }
1006
1007 int synaptics_init(struct psmouse *psmouse)
1008 {
1009         return -ENOSYS;
1010 }
1011
1012 bool synaptics_supported(void)
1013 {
1014         return false;
1015 }
1016
1017 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */