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/input.h>
  28 #include <linux/serio.h>
  29 #include <linux/libps2.h>
  30 #include "psmouse.h"
  31 #include "synaptics.h"
  32
  33 /*
  34  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
  35  * section 2.3.2, which says that they should be valid regardless of the
  36  * actual size of the sensor.
  37  */
  38 #define XMIN_NOMINAL 1472
  39 #define XMAX_NOMINAL 5472
  40 #define YMIN_NOMINAL 1408
  41 #define YMAX_NOMINAL 4448
  42
  43
  44 /*****************************************************************************
  45  *      Stuff we need even when we do not want native Synaptics support
  46  ****************************************************************************/
  47
  48 /*
  49  * Set the synaptics touchpad mode byte by special commands
  50  */
  51 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  52 {
  53         unsigned char param[1];
  54
  55         if (psmouse_sliced_command(psmouse, mode))
  56                 return -1;
  57         param[0] = SYN_PS_SET_MODE2;
  58         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  59                 return -1;
  60         return 0;
  61 }
  62
  63 int synaptics_detect(struct psmouse *psmouse, int set_properties)
  64 {
  65         struct ps2dev *ps2dev = &psmouse->ps2dev;
  66         unsigned char param[4];
  67
  68         param[0] = 0;
  69
  70         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
  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_GETINFO);
  75
  76         if (param[1] != 0x47)
  77                 return -ENODEV;
  78
  79         if (set_properties) {
  80                 psmouse->vendor = "Synaptics";
  81                 psmouse->name = "TouchPad";
  82         }
  83
  84         return 0;
  85 }
  86
  87 void synaptics_reset(struct psmouse *psmouse)
  88 {
  89         /* reset touchpad back to relative mode, gestures enabled */
  90         synaptics_mode_cmd(psmouse, 0);
  91 }
  92
  93 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
  94
  95 /*****************************************************************************
  96  *      Synaptics communications functions
  97  ****************************************************************************/
  98
  99 /*
 100  * Send a command to the synpatics touchpad by special commands
 101  */
 102 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
 103 {
 104         if (psmouse_sliced_command(psmouse, c))
 105                 return -1;
 106         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
 107                 return -1;
 108         return 0;
 109 }
 110
 111 /*
 112  * Read the model-id bytes from the touchpad
 113  * see also SYN_MODEL_* macros
 114  */
 115 static int synaptics_model_id(struct psmouse *psmouse)
 116 {
 117         struct synaptics_data *priv = psmouse->private;
 118         unsigned char mi[3];
 119
 120         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
 121                 return -1;
 122         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
 123         return 0;
 124 }
 125
 126 /*
 127  * Read the capability-bits from the touchpad
 128  * see also the SYN_CAP_* macros
 129  */
 130 static int synaptics_capability(struct psmouse *psmouse)
 131 {
 132         struct synaptics_data *priv = psmouse->private;
 133         unsigned char cap[3];
 134
 135         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
 136                 return -1;
 137         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 138         priv->ext_cap = 0;
 139         if (!SYN_CAP_VALID(priv->capabilities))
 140                 return -1;
 141
 142         /*
 143          * Unless capExtended is set the rest of the flags should be ignored
 144          */
 145         if (!SYN_CAP_EXTENDED(priv->capabilities))
 146                 priv->capabilities = 0;
 147
 148         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 149                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 150                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
 151                                " but I'm not able to read them.");
 152                 } else {
 153                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 154
 155                         /*
 156                          * if nExtBtn is greater than 8 it should be considered
 157                          * invalid and treated as 0
 158                          */
 159                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 160                                 priv->ext_cap &= 0xff0fff;
 161                 }
 162         }
 163         return 0;
 164 }
 165
 166 /*
 167  * Identify Touchpad
 168  * See also the SYN_ID_* macros
 169  */
 170 static int synaptics_identify(struct psmouse *psmouse)
 171 {
 172         struct synaptics_data *priv = psmouse->private;
 173         unsigned char id[3];
 174
 175         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 176                 return -1;
 177         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 178         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 179                 return 0;
 180         return -1;
 181 }
 182
 183 static int synaptics_query_hardware(struct psmouse *psmouse)
 184 {
 185         if (synaptics_identify(psmouse))
 186                 return -1;
 187         if (synaptics_model_id(psmouse))
 188                 return -1;
 189         if (synaptics_capability(psmouse))
 190                 return -1;
 191
 192         return 0;
 193 }
 194
 195 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 196 {
 197         struct synaptics_data *priv = psmouse->private;
 198
 199         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 200         if (SYN_ID_MAJOR(priv->identity) >= 4)
 201                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 202         if (SYN_CAP_EXTENDED(priv->capabilities))
 203                 priv->mode |= SYN_BIT_W_MODE;
 204
 205         if (synaptics_mode_cmd(psmouse, priv->mode))
 206                 return -1;
 207
 208         return 0;
 209 }
 210
 211 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 212 {
 213         struct synaptics_data *priv = psmouse->private;
 214
 215         if (rate >= 80) {
 216                 priv->mode |= SYN_BIT_HIGH_RATE;
 217                 psmouse->rate = 80;
 218         } else {
 219                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 220                 psmouse->rate = 40;
 221         }
 222
 223         synaptics_mode_cmd(psmouse, priv->mode);
 224 }
 225
 226 /*****************************************************************************
 227  *      Synaptics pass-through PS/2 port support
 228  ****************************************************************************/
 229 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 230 {
 231         struct psmouse *parent = serio_get_drvdata(serio->parent);
 232         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 233
 234         if (psmouse_sliced_command(parent, c))
 235                 return -1;
 236         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 237                 return -1;
 238         return 0;
 239 }
 240
 241 static inline int synaptics_is_pt_packet(unsigned char *buf)
 242 {
 243         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 244 }
 245
 246 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 247 {
 248         struct psmouse *child = serio_get_drvdata(ptport);
 249
 250         if (child && child->state == PSMOUSE_ACTIVATED) {
 251                 serio_interrupt(ptport, packet[1], 0);
 252                 serio_interrupt(ptport, packet[4], 0);
 253                 serio_interrupt(ptport, packet[5], 0);
 254                 if (child->pktsize == 4)
 255                         serio_interrupt(ptport, packet[2], 0);
 256         } else
 257                 serio_interrupt(ptport, packet[1], 0);
 258 }
 259
 260 static void synaptics_pt_activate(struct psmouse *psmouse)
 261 {
 262         struct serio *ptport = psmouse->ps2dev.serio->child;
 263         struct psmouse *child = serio_get_drvdata(ptport);
 264         struct synaptics_data *priv = psmouse->private;
 265
 266         /* adjust the touchpad to child's choice of protocol */
 267         if (child) {
 268                 if (child->pktsize == 4)
 269                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 270                 else
 271                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 272
 273                 if (synaptics_mode_cmd(psmouse, priv->mode))
 274                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 275         }
 276 }
 277
 278 static void synaptics_pt_create(struct psmouse *psmouse)
 279 {
 280         struct serio *serio;
 281
 282         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 283         if (!serio) {
 284                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 285                 return;
 286         }
 287
 288         serio->id.type = SERIO_PS_PSTHRU;
 289         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 290         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 291         serio->write = synaptics_pt_write;
 292         serio->parent = psmouse->ps2dev.serio;
 293
 294         psmouse->pt_activate = synaptics_pt_activate;
 295
 296         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 297         serio_register_port(serio);
 298 }
 299
 300 /*****************************************************************************
 301  *      Functions to interpret the absolute mode packets
 302  ****************************************************************************/
 303
 304 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 305 {
 306         memset(hw, 0, sizeof(struct synaptics_hw_state));
 307
 308         if (SYN_MODEL_NEWABS(priv->model_id)) {
 309                 hw->x = (((buf[3] & 0x10) << 8) |
 310                          ((buf[1] & 0x0f) << 8) |
 311                          buf[4]);
 312                 hw->y = (((buf[3] & 0x20) << 7) |
 313                          ((buf[1] & 0xf0) << 4) |
 314                          buf[5]);
 315
 316                 hw->z = buf[2];
 317                 hw->w = (((buf[0] & 0x30) >> 2) |
 318                          ((buf[0] & 0x04) >> 1) |
 319                          ((buf[3] & 0x04) >> 2));
 320
 321                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 322                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 323
 324                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 325                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 326                         if (hw->w == 2)
 327                                 hw->scroll = (signed char)(buf[1]);
 328                 }
 329
 330                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 331                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 332                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 333                 }
 334
 335                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 336                     ((buf[0] ^ buf[3]) & 0x02)) {
 337                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 338                         default:
 339                                 /*
 340                                  * if nExtBtn is greater than 8 it should be
 341                                  * considered invalid and treated as 0
 342                                  */
 343                                 break;
 344                         case 8:
 345                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 346                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 347                         case 6:
 348                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 349                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 350                         case 4:
 351                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 352                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 353                         case 2:
 354                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 355                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 356                         }
 357                 }
 358         } else {
 359                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 360                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 361
 362                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 363                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 364
 365                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 366                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 367         }
 368 }
 369
 370 /*
 371  *  called for each full received packet from the touchpad
 372  */
 373 static void synaptics_process_packet(struct psmouse *psmouse)
 374 {
 375         struct input_dev *dev = psmouse->dev;
 376         struct synaptics_data *priv = psmouse->private;
 377         struct synaptics_hw_state hw;
 378         int num_fingers;
 379         int finger_width;
 380         int i;
 381
 382         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
 383
 384         if (hw.scroll) {
 385                 priv->scroll += hw.scroll;
 386
 387                 while (priv->scroll >= 4) {
 388                         input_report_key(dev, BTN_BACK, !hw.down);
 389                         input_sync(dev);
 390                         input_report_key(dev, BTN_BACK, hw.down);
 391                         input_sync(dev);
 392                         priv->scroll -= 4;
 393                 }
 394                 while (priv->scroll <= -4) {
 395                         input_report_key(dev, BTN_FORWARD, !hw.up);
 396                         input_sync(dev);
 397                         input_report_key(dev, BTN_FORWARD, hw.up);
 398                         input_sync(dev);
 399                         priv->scroll += 4;
 400                 }
 401                 return;
 402         }
 403
 404         if (hw.z > 0) {
 405                 num_fingers = 1;
 406                 finger_width = 5;
 407                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 408                         switch (hw.w) {
 409                         case 0 ... 1:
 410                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 411                                         num_fingers = hw.w + 2;
 412                                 break;
 413                         case 2:
 414                                 if (SYN_MODEL_PEN(priv->model_id))
 415                                         ;   /* Nothing, treat a pen as a single finger */
 416                                 break;
 417                         case 4 ... 15:
 418                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 419                                         finger_width = hw.w;
 420                                 break;
 421                         }
 422                 }
 423         } else {
 424                 num_fingers = 0;
 425                 finger_width = 0;
 426         }
 427
 428         /* Post events
 429          * BTN_TOUCH has to be first as mousedev relies on it when doing
 430          * absolute -> relative conversion
 431          */
 432         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 433         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 434
 435         if (hw.z > 0) {
 436                 input_report_abs(dev, ABS_X, hw.x);
 437                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 438         }
 439         input_report_abs(dev, ABS_PRESSURE, hw.z);
 440
 441         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 442         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 443         input_report_key(dev, BTN_LEFT, hw.left);
 444         input_report_key(dev, BTN_RIGHT, hw.right);
 445
 446         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 447                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 448                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 449         }
 450
 451         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 452                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 453
 454         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 455                 input_report_key(dev, BTN_FORWARD, hw.up);
 456                 input_report_key(dev, BTN_BACK, hw.down);
 457         }
 458
 459         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 460                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 461
 462         input_sync(dev);
 463 }
 464
 465 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 466 {
 467         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 468         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 469         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 470         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 471         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 472
 473         if (idx < 0 || idx > 4)
 474                 return 0;
 475
 476         switch (pkt_type) {
 477                 case SYN_NEWABS:
 478                 case SYN_NEWABS_RELAXED:
 479                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 480
 481                 case SYN_NEWABS_STRICT:
 482                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 483
 484                 case SYN_OLDABS:
 485                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 486
 487                 default:
 488                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 489                         return 0;
 490         }
 491 }
 492
 493 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 494 {
 495         int i;
 496
 497         for (i = 0; i < 5; i++)
 498                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 499                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 500                         return SYN_NEWABS_RELAXED;
 501                 }
 502
 503         return SYN_NEWABS_STRICT;
 504 }
 505
 506 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 507 {
 508         struct synaptics_data *priv = psmouse->private;
 509
 510         if (psmouse->pktcnt >= 6) { /* Full packet received */
 511                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 512                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 513
 514                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
 515                         if (psmouse->ps2dev.serio->child)
 516                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
 517                 } else
 518                         synaptics_process_packet(psmouse);
 519
 520                 return PSMOUSE_FULL_PACKET;
 521         }
 522
 523         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 524                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 525 }
 526
 527 /*****************************************************************************
 528  *      Driver initialization/cleanup functions
 529  ****************************************************************************/
 530 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 531 {
 532         int i;
 533
 534         set_bit(EV_ABS, dev->evbit);
 535         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
 536         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
 537         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 538         set_bit(ABS_TOOL_WIDTH, dev->absbit);
 539
 540         set_bit(EV_KEY, dev->evbit);
 541         set_bit(BTN_TOUCH, dev->keybit);
 542         set_bit(BTN_TOOL_FINGER, dev->keybit);
 543         set_bit(BTN_LEFT, dev->keybit);
 544         set_bit(BTN_RIGHT, dev->keybit);
 545
 546         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
 547                 set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 548                 set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 549         }
 550
 551         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 552                 set_bit(BTN_MIDDLE, dev->keybit);
 553
 554         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 555             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 556                 set_bit(BTN_FORWARD, dev->keybit);
 557                 set_bit(BTN_BACK, dev->keybit);
 558         }
 559
 560         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 561                 set_bit(BTN_0 + i, dev->keybit);
 562
 563         clear_bit(EV_REL, dev->evbit);
 564         clear_bit(REL_X, dev->relbit);
 565         clear_bit(REL_Y, dev->relbit);
 566 }
 567
 568 static void synaptics_disconnect(struct psmouse *psmouse)
 569 {
 570         synaptics_reset(psmouse);
 571         kfree(psmouse->private);
 572         psmouse->private = NULL;
 573 }
 574
 575 static int synaptics_reconnect(struct psmouse *psmouse)
 576 {
 577         struct synaptics_data *priv = psmouse->private;
 578         struct synaptics_data old_priv = *priv;
 579
 580         psmouse_reset(psmouse);
 581
 582         if (synaptics_detect(psmouse, 0))
 583                 return -1;
 584
 585         if (synaptics_query_hardware(psmouse)) {
 586                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 587                 return -1;
 588         }
 589
 590         if (old_priv.identity != priv->identity ||
 591             old_priv.model_id != priv->model_id ||
 592             old_priv.capabilities != priv->capabilities ||
 593             old_priv.ext_cap != priv->ext_cap)
 594                 return -1;
 595
 596         if (synaptics_set_absolute_mode(psmouse)) {
 597                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 598                 return -1;
 599         }
 600
 601         return 0;
 602 }
 603
 604 #if defined(__i386__)
 605 #include <linux/dmi.h>
 606 static const struct dmi_system_id toshiba_dmi_table[] = {
 607         {
 608                 .ident = "Toshiba Satellite",
 609                 .matches = {
 610                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 611                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 612                 },
 613         },
 614         {
 615                 .ident = "Toshiba Dynabook",
 616                 .matches = {
 617                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 618                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 619                 },
 620         },
 621         {
 622                 .ident = "Toshiba Portege M300",
 623                 .matches = {
 624                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 625                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 626                 },
 627         },
 628         { }
 629 };
 630 #endif
 631
 632 int synaptics_init(struct psmouse *psmouse)
 633 {
 634         struct synaptics_data *priv;
 635
 636         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 637         if (!priv)
 638                 return -1;
 639
 640         psmouse_reset(psmouse);
 641
 642         if (synaptics_query_hardware(psmouse)) {
 643                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 644                 goto init_fail;
 645         }
 646
 647         if (synaptics_set_absolute_mode(psmouse)) {
 648                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 649                 goto init_fail;
 650         }
 651
 652         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 653
 654         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",
 655                 SYN_ID_MODEL(priv->identity),
 656                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 657                 priv->model_id, priv->capabilities, priv->ext_cap);
 658
 659         set_input_params(psmouse->dev, priv);
 660
 661         /*
 662          * Encode touchpad model so that it can be used to set
 663          * input device->id.version and be visible to userspace.
 664          * Because version is __u16 we have to drop something.
 665          * Hardware info bits seem to be good candidates as they
 666          * are documented to be for Synaptics corp. internal use.
 667          */
 668         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
 669                           (priv->model_id & 0x000000ff);
 670
 671         psmouse->protocol_handler = synaptics_process_byte;
 672         psmouse->set_rate = synaptics_set_rate;
 673         psmouse->disconnect = synaptics_disconnect;
 674         psmouse->reconnect = synaptics_reconnect;
 675         psmouse->cleanup = synaptics_reset;
 676         psmouse->pktsize = 6;
 677         /* Synaptics can usually stay in sync without extra help */
 678         psmouse->resync_time = 0;
 679
 680         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 681                 synaptics_pt_create(psmouse);
 682
 683 #if defined(__i386__)
 684         /*
 685          * Toshiba's KBC seems to have trouble handling data from
 686          * Synaptics as full rate, switch to lower rate which is roughly
 687          * thye same as rate of standard PS/2 mouse.
 688          */
 689         if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
 690                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 691                         dmi_get_system_info(DMI_PRODUCT_NAME));
 692                 psmouse->rate = 40;
 693         }
 694 #endif
 695
 696         return 0;
 697
 698  init_fail:
 699         kfree(priv);
 700         return -1;
 701 }
 702
 703 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
 704
 705 int synaptics_init(struct psmouse *psmouse)
 706 {
 707         return -ENOSYS;
 708 }
 709
 710 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
 711