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.h>
  29 #include <linux/serio.h>
  30 #include <linux/libps2.h>
  31 #include "psmouse.h"
  32 #include "synaptics.h"
  33
  34 /*
  35  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  36  * section 2.3.2, which says that they should be valid regardless of the
  37  * actual size of the sensor.
  38  */
  39 #define XMIN_NOMINAL 1472
  40 #define XMAX_NOMINAL 5472
  41 #define YMIN_NOMINAL 1408
  42 #define YMAX_NOMINAL 4448
  43
  44
  45 /*****************************************************************************
  46  *      Stuff we need even when we do not want native Synaptics support
  47  ****************************************************************************/
  48
  49 /*
  50  * Set the synaptics touchpad mode byte by special commands
  51  */
  52 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  53 {
  54         unsigned char param[1];
  55
  56         if (psmouse_sliced_command(psmouse, mode))
  57                 return -1;
  58         param[0] = SYN_PS_SET_MODE2;
  59         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  60                 return -1;
  61         return 0;
  62 }
  63
  64 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
  65 {
  66         struct ps2dev *ps2dev = &psmouse->ps2dev;
  67         unsigned char param[4];
  68
  69         param[0] = 0;
  70
  71         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  72         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  73         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  74         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  75         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
  76
  77         if (param[1] != 0x47)
  78                 return -ENODEV;
  79
  80         if (set_properties) {
  81                 psmouse->vendor = "Synaptics";
  82                 psmouse->name = "TouchPad";
  83         }
  84
  85         return 0;
  86 }
  87
  88 void synaptics_reset(struct psmouse *psmouse)
  89 {
  90         /* reset touchpad back to relative mode, gestures enabled */
  91         synaptics_mode_cmd(psmouse, 0);
  92 }
  93
  94 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
  95
  96 /*****************************************************************************
  97  *      Synaptics communications functions
  98  ****************************************************************************/
  99
 100 /*
 101  * Send a command to the synpatics touchpad by special commands
 102  */
 103 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 104 {
 105         if (psmouse_sliced_command(psmouse, c))
 106                 return -1;
 107         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 108                 return -1;
 109         return 0;
 110 }
 111
 112 /*
 113  * Read the model-id bytes from the touchpad
 114  * see also SYN_MODEL_* macros
 115  */
 116 static int synaptics_model_id(struct psmouse *psmouse)
 117 {
 118         struct synaptics_data *priv = psmouse->private;
 119         unsigned char mi[3];
 120
 121         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 122                 return -1;
 123         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 124         return 0;
 125 }
 126
 127 /*
 128  * Read the capability-bits from the touchpad
 129  * see also the SYN_CAP_* macros
 130  */
 131 static int synaptics_capability(struct psmouse *psmouse)
 132 {
 133         struct synaptics_data *priv = psmouse->private;
 134         unsigned char cap[3];
 135
 136         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 137                 return -1;
 138         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 139         priv->ext_cap = 0;
 140         if (!SYN_CAP_VALID(priv->capabilities))
 141                 return -1;
 142
 143         /*
 144          * Unless capExtended is set the rest of the flags should be ignored
 145          */
 146         if (!SYN_CAP_EXTENDED(priv->capabilities))
 147                 priv->capabilities = 0;
 148
 149         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 150                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 151                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
 152                                " but I'm not able to read them.");
 153                 } else {
 154                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 155
 156                         /*
 157                          * if nExtBtn is greater than 8 it should be considered
 158                          * invalid and treated as 0
 159                          */
 160                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 161                                 priv->ext_cap &= 0xff0fff;
 162                 }
 163         }
 164         return 0;
 165 }
 166
 167 /*
 168  * Identify Touchpad
 169  * See also the SYN_ID_* macros
 170  */
 171 static int synaptics_identify(struct psmouse *psmouse)
 172 {
 173         struct synaptics_data *priv = psmouse->private;
 174         unsigned char id[3];
 175
 176         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 177                 return -1;
 178         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 179         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 180                 return 0;
 181         return -1;
 182 }
 183
 184 /*
 185  * Read touchpad resolution
 186  * Resolution is left zero if touchpad does not support the query
 187  */
 188 static int synaptics_resolution(struct psmouse *psmouse)
 189 {
 190         struct synaptics_data *priv = psmouse->private;
 191         unsigned char res[3];
 192
 193         if (SYN_ID_MAJOR(priv->identity) < 4)
 194                 return 0;
 195
 196         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res))
 197                 return 0;
 198
 199         if ((res[0] != 0) && (res[1] & 0x80) && (res[2] != 0)) {
 200                 priv->x_res = res[0]; /* x resolution in units/mm */
 201                 priv->y_res = res[2]; /* y resolution in units/mm */
 202         }
 203
 204         return 0;
 205 }
 206
 207 static int synaptics_query_hardware(struct psmouse *psmouse)
 208 {
 209         if (synaptics_identify(psmouse))
 210                 return -1;
 211         if (synaptics_model_id(psmouse))
 212                 return -1;
 213         if (synaptics_capability(psmouse))
 214                 return -1;
 215         if (synaptics_resolution(psmouse))
 216                 return -1;
 217
 218         return 0;
 219 }
 220
 221 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 222 {
 223         struct synaptics_data *priv = psmouse->private;
 224
 225         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 226         if (SYN_ID_MAJOR(priv->identity) >= 4)
 227                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 228         if (SYN_CAP_EXTENDED(priv->capabilities))
 229                 priv->mode |= SYN_BIT_W_MODE;
 230
 231         if (synaptics_mode_cmd(psmouse, priv->mode))
 232                 return -1;
 233
 234         return 0;
 235 }
 236
 237 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 238 {
 239         struct synaptics_data *priv = psmouse->private;
 240
 241         if (rate >= 80) {
 242                 priv->mode |= SYN_BIT_HIGH_RATE;
 243                 psmouse->rate = 80;
 244         } else {
 245                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 246                 psmouse->rate = 40;
 247         }
 248
 249         synaptics_mode_cmd(psmouse, priv->mode);
 250 }
 251
 252 /*****************************************************************************
 253  *      Synaptics pass-through PS/2 port support
 254  ****************************************************************************/
 255 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 256 {
 257         struct psmouse *parent = serio_get_drvdata(serio->parent);
 258         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 259
 260         if (psmouse_sliced_command(parent, c))
 261                 return -1;
 262         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 263                 return -1;
 264         return 0;
 265 }
 266
 267 static inline int synaptics_is_pt_packet(unsigned char *buf)
 268 {
 269         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 270 }
 271
 272 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 273 {
 274         struct psmouse *child = serio_get_drvdata(ptport);
 275
 276         if (child && child->state == PSMOUSE_ACTIVATED) {
 277                 serio_interrupt(ptport, packet[1], 0);
 278                 serio_interrupt(ptport, packet[4], 0);
 279                 serio_interrupt(ptport, packet[5], 0);
 280                 if (child->pktsize == 4)
 281                         serio_interrupt(ptport, packet[2], 0);
 282         } else
 283                 serio_interrupt(ptport, packet[1], 0);
 284 }
 285
 286 static void synaptics_pt_activate(struct psmouse *psmouse)
 287 {
 288         struct serio *ptport = psmouse->ps2dev.serio->child;
 289         struct psmouse *child = serio_get_drvdata(ptport);
 290         struct synaptics_data *priv = psmouse->private;
 291
 292         /* adjust the touchpad to child's choice of protocol */
 293         if (child) {
 294                 if (child->pktsize == 4)
 295                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 296                 else
 297                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 298
 299                 if (synaptics_mode_cmd(psmouse, priv->mode))
 300                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 301         }
 302 }
 303
 304 static void synaptics_pt_create(struct psmouse *psmouse)
 305 {
 306         struct serio *serio;
 307
 308         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 309         if (!serio) {
 310                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 311                 return;
 312         }
 313
 314         serio->id.type = SERIO_PS_PSTHRU;
 315         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 316         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 317         serio->write = synaptics_pt_write;
 318         serio->parent = psmouse->ps2dev.serio;
 319
 320         psmouse->pt_activate = synaptics_pt_activate;
 321
 322         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 323         serio_register_port(serio);
 324 }
 325
 326 /*****************************************************************************
 327  *      Functions to interpret the absolute mode packets
 328  ****************************************************************************/
 329
 330 /* left and right clickpad button ranges;
 331  * the gap between them is interpreted as a middle-button click
 332  */
 333 #define CLICKPAD_LEFT_BTN_X \
 334         ((XMAX_NOMINAL - XMIN_NOMINAL) * 2 / 5 + XMIN_NOMINAL)
 335 #define CLICKPAD_RIGHT_BTN_X \
 336         ((XMAX_NOMINAL - XMIN_NOMINAL) * 3 / 5 + XMIN_NOMINAL)
 337
 338 /* handle clickpad events */
 339 static void clickpad_process_packet(struct synaptics_data *priv,
 340                                     struct synaptics_hw_state *hw)
 341 {
 342         /* clickpad mode reports Y range from 0 to YMAX_NOMINAL,
 343          * where the area Y < YMIN_NOMINAL is used as click buttons
 344          */
 345         if (hw->y < YMIN_NOMINAL) {
 346                 /* button area */
 347                 hw->z = 0; /* don't move pointer */
 348                 /* clickpad reports only the middle button, and we need
 349                  * to fake left/right buttons depending on the touch position
 350                  */
 351                 if (hw->middle) { /* clicked? */
 352                         hw->middle = 0;
 353                         if (hw->x < CLICKPAD_LEFT_BTN_X)
 354                                 hw->left = 1;
 355                         else if (hw->x > CLICKPAD_RIGHT_BTN_X)
 356                                 hw->right = 1;
 357                         else
 358                                 hw->middle = 1;
 359                 }
 360         } else if (hw->middle) {
 361                 /* dragging */
 362                 hw->left = priv->prev_hw.left;
 363                 hw->right = priv->prev_hw.right;
 364                 hw->middle = priv->prev_hw.middle;
 365         }
 366         priv->prev_hw = *hw;
 367 }
 368
 369 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 370 {
 371         memset(hw, 0, sizeof(struct synaptics_hw_state));
 372
 373         if (SYN_MODEL_NEWABS(priv->model_id)) {
 374                 hw->x = (((buf[3] & 0x10) << 8) |
 375                          ((buf[1] & 0x0f) << 8) |
 376                          buf[4]);
 377                 hw->y = (((buf[3] & 0x20) << 7) |
 378                          ((buf[1] & 0xf0) << 4) |
 379                          buf[5]);
 380
 381                 hw->z = buf[2];
 382                 hw->w = (((buf[0] & 0x30) >> 2) |
 383                          ((buf[0] & 0x04) >> 1) |
 384                          ((buf[3] & 0x04) >> 2));
 385
 386                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 387                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 388
 389                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 390                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 391                         if (hw->w == 2)
 392                                 hw->scroll = (signed char)(buf[1]);
 393                 }
 394
 395                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 396                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 397                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 398                 }
 399
 400                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 401                     ((buf[0] ^ buf[3]) & 0x02)) {
 402                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 403                         default:
 404                                 /*
 405                                  * if nExtBtn is greater than 8 it should be
 406                                  * considered invalid and treated as 0
 407                                  */
 408                                 break;
 409                         case 8:
 410                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 411                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 412                         case 6:
 413                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 414                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 415                         case 4:
 416                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 417                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 418                         case 2:
 419                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 420                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 421                         }
 422                 }
 423         } else {
 424                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 425                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 426
 427                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 428                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 429
 430                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 431                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 432         }
 433 }
 434
 435 /*
 436  *  called for each full received packet from the touchpad
 437  */
 438 static void synaptics_process_packet(struct psmouse *psmouse)
 439 {
 440         struct input_dev *dev = psmouse->dev;
 441         struct synaptics_data *priv = psmouse->private;
 442         struct synaptics_hw_state hw;
 443         int num_fingers;
 444         int finger_width;
 445         int i;
 446
 447         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
 448
 449         if (SYN_CAP_CLICKPAD(priv->ext_cap))
 450                 clickpad_process_packet(priv, &hw);
 451
 452         if (hw.scroll) {
 453                 priv->scroll += hw.scroll;
 454
 455                 while (priv->scroll >= 4) {
 456                         input_report_key(dev, BTN_BACK, !hw.down);
 457                         input_sync(dev);
 458                         input_report_key(dev, BTN_BACK, hw.down);
 459                         input_sync(dev);
 460                         priv->scroll -= 4;
 461                 }
 462                 while (priv->scroll <= -4) {
 463                         input_report_key(dev, BTN_FORWARD, !hw.up);
 464                         input_sync(dev);
 465                         input_report_key(dev, BTN_FORWARD, hw.up);
 466                         input_sync(dev);
 467                         priv->scroll += 4;
 468                 }
 469                 return;
 470         }
 471
 472         if (hw.z > 0) {
 473                 num_fingers = 1;
 474                 finger_width = 5;
 475                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 476                         switch (hw.w) {
 477                         case 0 ... 1:
 478                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 479                                         num_fingers = hw.w + 2;
 480                                 break;
 481                         case 2:
 482                                 if (SYN_MODEL_PEN(priv->model_id))
 483                                         ;   /* Nothing, treat a pen as a single finger */
 484                                 break;
 485                         case 4 ... 15:
 486                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 487                                         finger_width = hw.w;
 488                                 break;
 489                         }
 490                 }
 491         } else {
 492                 num_fingers = 0;
 493                 finger_width = 0;
 494         }
 495
 496         /* Post events
 497          * BTN_TOUCH has to be first as mousedev relies on it when doing
 498          * absolute -> relative conversion
 499          */
 500         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 501         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 502
 503         if (hw.z > 0) {
 504                 input_report_abs(dev, ABS_X, hw.x);
 505                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 506         }
 507         input_report_abs(dev, ABS_PRESSURE, hw.z);
 508
 509         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 510         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 511         input_report_key(dev, BTN_LEFT, hw.left);
 512         input_report_key(dev, BTN_RIGHT, hw.right);
 513
 514         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 515                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 516                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 517         }
 518
 519         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 520                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 521
 522         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 523                 input_report_key(dev, BTN_FORWARD, hw.up);
 524                 input_report_key(dev, BTN_BACK, hw.down);
 525         }
 526
 527         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 528                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 529
 530         input_sync(dev);
 531 }
 532
 533 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 534 {
 535         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 536         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 537         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 538         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 539         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 540
 541         if (idx < 0 || idx > 4)
 542                 return 0;
 543
 544         switch (pkt_type) {
 545                 case SYN_NEWABS:
 546                 case SYN_NEWABS_RELAXED:
 547                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 548
 549                 case SYN_NEWABS_STRICT:
 550                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 551
 552                 case SYN_OLDABS:
 553                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 554
 555                 default:
 556                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 557                         return 0;
 558         }
 559 }
 560
 561 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 562 {
 563         int i;
 564
 565         for (i = 0; i < 5; i++)
 566                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 567                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 568                         return SYN_NEWABS_RELAXED;
 569                 }
 570
 571         return SYN_NEWABS_STRICT;
 572 }
 573
 574 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 575 {
 576         struct synaptics_data *priv = psmouse->private;
 577
 578         if (psmouse->pktcnt >= 6) { /* Full packet received */
 579                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 580                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 581
 582                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
 583                         if (psmouse->ps2dev.serio->child)
 584                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
 585                 } else
 586                         synaptics_process_packet(psmouse);
 587
 588                 return PSMOUSE_FULL_PACKET;
 589         }
 590
 591         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 592                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 593 }
 594
 595 /*****************************************************************************
 596  *      Driver initialization/cleanup functions
 597  ****************************************************************************/
 598 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 599 {
 600         int i;
 601
 602         __set_bit(EV_ABS, dev->evbit);
 603         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
 604         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
 605         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 606         __set_bit(ABS_TOOL_WIDTH, dev->absbit);
 607
 608         __set_bit(EV_KEY, dev->evbit);
 609         __set_bit(BTN_TOUCH, dev->keybit);
 610         __set_bit(BTN_TOOL_FINGER, dev->keybit);
 611         __set_bit(BTN_LEFT, dev->keybit);
 612         __set_bit(BTN_RIGHT, dev->keybit);
 613
 614         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 615                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 616                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 617         }
 618
 619         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 620                 __set_bit(BTN_MIDDLE, dev->keybit);
 621
 622         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 623             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 624                 __set_bit(BTN_FORWARD, dev->keybit);
 625                 __set_bit(BTN_BACK, dev->keybit);
 626         }
 627
 628         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 629                 __set_bit(BTN_0 + i, dev->keybit);
 630
 631         __clear_bit(EV_REL, dev->evbit);
 632         __clear_bit(REL_X, dev->relbit);
 633         __clear_bit(REL_Y, dev->relbit);
 634
 635         dev->absres[ABS_X] = priv->x_res;
 636         dev->absres[ABS_Y] = priv->y_res;
 637 }
 638
 639 static void synaptics_disconnect(struct psmouse *psmouse)
 640 {
 641         synaptics_reset(psmouse);
 642         kfree(psmouse->private);
 643         psmouse->private = NULL;
 644 }
 645
 646 static int synaptics_reconnect(struct psmouse *psmouse)
 647 {
 648         struct synaptics_data *priv = psmouse->private;
 649         struct synaptics_data old_priv = *priv;
 650
 651         psmouse_reset(psmouse);
 652
 653         if (synaptics_detect(psmouse, 0))
 654                 return -1;
 655
 656         if (synaptics_query_hardware(psmouse)) {
 657                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 658                 return -1;
 659         }
 660
 661         if (old_priv.identity != priv->identity ||
 662             old_priv.model_id != priv->model_id ||
 663             old_priv.capabilities != priv->capabilities ||
 664             old_priv.ext_cap != priv->ext_cap)
 665                 return -1;
 666
 667         if (synaptics_set_absolute_mode(psmouse)) {
 668                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 669                 return -1;
 670         }
 671
 672         return 0;
 673 }
 674
 675 static bool impaired_toshiba_kbc;
 676
 677 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
 678 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
 679         {
 680                 /* Toshiba Satellite */
 681                 .matches = {
 682                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 683                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 684                 },
 685         },
 686         {
 687                 /* Toshiba Dynabook */
 688                 .matches = {
 689                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 690                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 691                 },
 692         },
 693         {
 694                 /* Toshiba Portege M300 */
 695                 .matches = {
 696                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 697                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 698                 },
 699
 700         },
 701         {
 702                 /* Toshiba Portege M300 */
 703                 .matches = {
 704                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 705                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
 706                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
 707                 },
 708
 709         },
 710         { }
 711 #endif
 712 };
 713
 714 void __init synaptics_module_init(void)
 715 {
 716         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
 717 }
 718
 719 int synaptics_init(struct psmouse *psmouse)
 720 {
 721         struct synaptics_data *priv;
 722
 723         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 724         if (!priv)
 725                 return -1;
 726
 727         psmouse_reset(psmouse);
 728
 729         if (synaptics_query_hardware(psmouse)) {
 730                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 731                 goto init_fail;
 732         }
 733
 734         if (synaptics_set_absolute_mode(psmouse)) {
 735                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 736                 goto init_fail;
 737         }
 738
 739         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 740
 741         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",
 742                 SYN_ID_MODEL(priv->identity),
 743                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 744                 priv->model_id, priv->capabilities, priv->ext_cap);
 745
 746         if (SYN_CAP_CLICKPAD(priv->ext_cap)) {
 747                 printk(KERN_INFO "Synaptics: Clickpad mode enabled\n");
 748                 /* force to enable the middle button */
 749                 priv->capabilities |= (1 << 18);
 750         }
 751
 752         set_input_params(psmouse->dev, priv);
 753
 754         /*
 755          * Encode touchpad model so that it can be used to set
 756          * input device->id.version and be visible to userspace.
 757          * Because version is __u16 we have to drop something.
 758          * Hardware info bits seem to be good candidates as they
 759          * are documented to be for Synaptics corp. internal use.
 760          */
 761         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
 762                           (priv->model_id & 0x000000ff);
 763
 764         psmouse->protocol_handler = synaptics_process_byte;
 765         psmouse->set_rate = synaptics_set_rate;
 766         psmouse->disconnect = synaptics_disconnect;
 767         psmouse->reconnect = synaptics_reconnect;
 768         psmouse->cleanup = synaptics_reset;
 769         psmouse->pktsize = 6;
 770         /* Synaptics can usually stay in sync without extra help */
 771         psmouse->resync_time = 0;
 772
 773         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 774                 synaptics_pt_create(psmouse);
 775
 776         /*
 777          * Toshiba's KBC seems to have trouble handling data from
 778          * Synaptics as full rate, switch to lower rate which is roughly
 779          * thye same as rate of standard PS/2 mouse.
 780          */
 781         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
 782                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 783                         dmi_get_system_info(DMI_PRODUCT_NAME));
 784                 psmouse->rate = 40;
 785         }
 786
 787         return 0;
 788
 789  init_fail:
 790         kfree(priv);
 791         return -1;
 792 }
 793
 794 bool synaptics_supported(void)
 795 {
 796         return true;
 797 }
 798
 799 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
 800
 801 void __init synaptics_module_init(void)
 802 {
 803 }
 804
 805 int synaptics_init(struct psmouse *psmouse)
 806 {
 807         return -ENOSYS;
 808 }
 809
 810 bool synaptics_supported(void)
 811 {
 812         return false;
 813 }
 814
 815 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
 816