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         int retries = 0;
 186
 187         while ((retries++ < 3) && psmouse_reset(psmouse))
 188                 /* empty */;
 189
 190         if (synaptics_identify(psmouse))
 191                 return -1;
 192         if (synaptics_model_id(psmouse))
 193                 return -1;
 194         if (synaptics_capability(psmouse))
 195                 return -1;
 196
 197         return 0;
 198 }
 199
 200 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 201 {
 202         struct synaptics_data *priv = psmouse->private;
 203
 204         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 205         if (SYN_ID_MAJOR(priv->identity) >= 4)
 206                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 207         if (SYN_CAP_EXTENDED(priv->capabilities))
 208                 priv->mode |= SYN_BIT_W_MODE;
 209
 210         if (synaptics_mode_cmd(psmouse, priv->mode))
 211                 return -1;
 212
 213         return 0;
 214 }
 215
 216 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 217 {
 218         struct synaptics_data *priv = psmouse->private;
 219
 220         if (rate >= 80) {
 221                 priv->mode |= SYN_BIT_HIGH_RATE;
 222                 psmouse->rate = 80;
 223         } else {
 224                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 225                 psmouse->rate = 40;
 226         }
 227
 228         synaptics_mode_cmd(psmouse, priv->mode);
 229 }
 230
 231 /*****************************************************************************
 232  *      Synaptics pass-through PS/2 port support
 233  ****************************************************************************/
 234 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 235 {
 236         struct psmouse *parent = serio_get_drvdata(serio->parent);
 237         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 238
 239         if (psmouse_sliced_command(parent, c))
 240                 return -1;
 241         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 242                 return -1;
 243         return 0;
 244 }
 245
 246 static inline int synaptics_is_pt_packet(unsigned char *buf)
 247 {
 248         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 249 }
 250
 251 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 252 {
 253         struct psmouse *child = serio_get_drvdata(ptport);
 254
 255         if (child && child->state == PSMOUSE_ACTIVATED) {
 256                 serio_interrupt(ptport, packet[1], 0);
 257                 serio_interrupt(ptport, packet[4], 0);
 258                 serio_interrupt(ptport, packet[5], 0);
 259                 if (child->pktsize == 4)
 260                         serio_interrupt(ptport, packet[2], 0);
 261         } else
 262                 serio_interrupt(ptport, packet[1], 0);
 263 }
 264
 265 static void synaptics_pt_activate(struct psmouse *psmouse)
 266 {
 267         struct serio *ptport = psmouse->ps2dev.serio->child;
 268         struct psmouse *child = serio_get_drvdata(ptport);
 269         struct synaptics_data *priv = psmouse->private;
 270
 271         /* adjust the touchpad to child's choice of protocol */
 272         if (child) {
 273                 if (child->pktsize == 4)
 274                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 275                 else
 276                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 277
 278                 if (synaptics_mode_cmd(psmouse, priv->mode))
 279                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 280         }
 281 }
 282
 283 static void synaptics_pt_create(struct psmouse *psmouse)
 284 {
 285         struct serio *serio;
 286
 287         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 288         if (!serio) {
 289                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 290                 return;
 291         }
 292
 293         serio->id.type = SERIO_PS_PSTHRU;
 294         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 295         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 296         serio->write = synaptics_pt_write;
 297         serio->parent = psmouse->ps2dev.serio;
 298
 299         psmouse->pt_activate = synaptics_pt_activate;
 300
 301         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 302         serio_register_port(serio);
 303 }
 304
 305 /*****************************************************************************
 306  *      Functions to interpret the absolute mode packets
 307  ****************************************************************************/
 308
 309 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 310 {
 311         memset(hw, 0, sizeof(struct synaptics_hw_state));
 312
 313         if (SYN_MODEL_NEWABS(priv->model_id)) {
 314                 hw->x = (((buf[3] & 0x10) << 8) |
 315                          ((buf[1] & 0x0f) << 8) |
 316                          buf[4]);
 317                 hw->y = (((buf[3] & 0x20) << 7) |
 318                          ((buf[1] & 0xf0) << 4) |
 319                          buf[5]);
 320
 321                 hw->z = buf[2];
 322                 hw->w = (((buf[0] & 0x30) >> 2) |
 323                          ((buf[0] & 0x04) >> 1) |
 324                          ((buf[3] & 0x04) >> 2));
 325
 326                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 327                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 328
 329                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 330                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 331                         if (hw->w == 2)
 332                                 hw->scroll = (signed char)(buf[1]);
 333                 }
 334
 335                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 336                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 337                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 338                 }
 339
 340                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 341                     ((buf[0] ^ buf[3]) & 0x02)) {
 342                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 343                         default:
 344                                 /*
 345                                  * if nExtBtn is greater than 8 it should be
 346                                  * considered invalid and treated as 0
 347                                  */
 348                                 break;
 349                         case 8:
 350                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 351                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 352                         case 6:
 353                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 354                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 355                         case 4:
 356                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 357                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 358                         case 2:
 359                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 360                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 361                         }
 362                 }
 363         } else {
 364                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 365                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 366
 367                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 368                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 369
 370                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 371                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 372         }
 373 }
 374
 375 /*
 376  *  called for each full received packet from the touchpad
 377  */
 378 static void synaptics_process_packet(struct psmouse *psmouse)
 379 {
 380         struct input_dev *dev = psmouse->dev;
 381         struct synaptics_data *priv = psmouse->private;
 382         struct synaptics_hw_state hw;
 383         int num_fingers;
 384         int finger_width;
 385         int i;
 386
 387         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
 388
 389         if (hw.scroll) {
 390                 priv->scroll += hw.scroll;
 391
 392                 while (priv->scroll >= 4) {
 393                         input_report_key(dev, BTN_BACK, !hw.down);
 394                         input_sync(dev);
 395                         input_report_key(dev, BTN_BACK, hw.down);
 396                         input_sync(dev);
 397                         priv->scroll -= 4;
 398                 }
 399                 while (priv->scroll <= -4) {
 400                         input_report_key(dev, BTN_FORWARD, !hw.up);
 401                         input_sync(dev);
 402                         input_report_key(dev, BTN_FORWARD, hw.up);
 403                         input_sync(dev);
 404                         priv->scroll += 4;
 405                 }
 406                 return;
 407         }
 408
 409         if (hw.z > 0) {
 410                 num_fingers = 1;
 411                 finger_width = 5;
 412                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 413                         switch (hw.w) {
 414                         case 0 ... 1:
 415                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 416                                         num_fingers = hw.w + 2;
 417                                 break;
 418                         case 2:
 419                                 if (SYN_MODEL_PEN(priv->model_id))
 420                                         ;   /* Nothing, treat a pen as a single finger */
 421                                 break;
 422                         case 4 ... 15:
 423                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 424                                         finger_width = hw.w;
 425                                 break;
 426                         }
 427                 }
 428         } else {
 429                 num_fingers = 0;
 430                 finger_width = 0;
 431         }
 432
 433         /* Post events
 434          * BTN_TOUCH has to be first as mousedev relies on it when doing
 435          * absolute -> relative conversion
 436          */
 437         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 438         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 439
 440         if (hw.z > 0) {
 441                 input_report_abs(dev, ABS_X, hw.x);
 442                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 443         }
 444         input_report_abs(dev, ABS_PRESSURE, hw.z);
 445
 446         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 447         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 448         input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 449         input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 450
 451         input_report_key(dev, BTN_LEFT, hw.left);
 452         input_report_key(dev, BTN_RIGHT, hw.right);
 453
 454         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 455                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 456
 457         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 458                 input_report_key(dev, BTN_FORWARD, hw.up);
 459                 input_report_key(dev, BTN_BACK, hw.down);
 460         }
 461
 462         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 463                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 464
 465         input_sync(dev);
 466 }
 467
 468 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 469 {
 470         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 471         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 472         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 473         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 474         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 475
 476         if (idx < 0 || idx > 4)
 477                 return 0;
 478
 479         switch (pkt_type) {
 480                 case SYN_NEWABS:
 481                 case SYN_NEWABS_RELAXED:
 482                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 483
 484                 case SYN_NEWABS_STRICT:
 485                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 486
 487                 case SYN_OLDABS:
 488                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 489
 490                 default:
 491                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 492                         return 0;
 493         }
 494 }
 495
 496 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 497 {
 498         int i;
 499
 500         for (i = 0; i < 5; i++)
 501                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 502                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 503                         return SYN_NEWABS_RELAXED;
 504                 }
 505
 506         return SYN_NEWABS_STRICT;
 507 }
 508
 509 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 510 {
 511         struct synaptics_data *priv = psmouse->private;
 512
 513         if (psmouse->pktcnt >= 6) { /* Full packet received */
 514                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 515                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 516
 517                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
 518                         if (psmouse->ps2dev.serio->child)
 519                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
 520                 } else
 521                         synaptics_process_packet(psmouse);
 522
 523                 return PSMOUSE_FULL_PACKET;
 524         }
 525
 526         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 527                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 528 }
 529
 530 /*****************************************************************************
 531  *      Driver initialization/cleanup functions
 532  ****************************************************************************/
 533 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 534 {
 535         int i;
 536
 537         set_bit(EV_ABS, dev->evbit);
 538         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
 539         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
 540         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 541         set_bit(ABS_TOOL_WIDTH, dev->absbit);
 542
 543         set_bit(EV_KEY, dev->evbit);
 544         set_bit(BTN_TOUCH, dev->keybit);
 545         set_bit(BTN_TOOL_FINGER, dev->keybit);
 546         set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 547         set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 548
 549         set_bit(BTN_LEFT, dev->keybit);
 550         set_bit(BTN_RIGHT, dev->keybit);
 551
 552         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 553                 set_bit(BTN_MIDDLE, dev->keybit);
 554
 555         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 556             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 557                 set_bit(BTN_FORWARD, dev->keybit);
 558                 set_bit(BTN_BACK, dev->keybit);
 559         }
 560
 561         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 562                 set_bit(BTN_0 + i, dev->keybit);
 563
 564         clear_bit(EV_REL, dev->evbit);
 565         clear_bit(REL_X, dev->relbit);
 566         clear_bit(REL_Y, dev->relbit);
 567 }
 568
 569 static void synaptics_disconnect(struct psmouse *psmouse)
 570 {
 571         synaptics_reset(psmouse);
 572         kfree(psmouse->private);
 573         psmouse->private = NULL;
 574 }
 575
 576 static int synaptics_reconnect(struct psmouse *psmouse)
 577 {
 578         struct synaptics_data *priv = psmouse->private;
 579         struct synaptics_data old_priv = *priv;
 580
 581         if (synaptics_detect(psmouse, 0))
 582                 return -1;
 583
 584         if (synaptics_query_hardware(psmouse)) {
 585                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 586                 return -1;
 587         }
 588
 589         if (old_priv.identity != priv->identity ||
 590             old_priv.model_id != priv->model_id ||
 591             old_priv.capabilities != priv->capabilities ||
 592             old_priv.ext_cap != priv->ext_cap)
 593                 return -1;
 594
 595         if (synaptics_set_absolute_mode(psmouse)) {
 596                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 597                 return -1;
 598         }
 599
 600         return 0;
 601 }
 602
 603 #if defined(__i386__)
 604 #include <linux/dmi.h>
 605 static struct dmi_system_id toshiba_dmi_table[] = {
 606         {
 607                 .ident = "Toshiba Satellite",
 608                 .matches = {
 609                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 610                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 611                 },
 612         },
 613         {
 614                 .ident = "Toshiba Dynabook",
 615                 .matches = {
 616                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 617                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 618                 },
 619         },
 620         {
 621                 .ident = "Toshiba Portege M300",
 622                 .matches = {
 623                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 624                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 625                 },
 626         },
 627         { }
 628 };
 629 #endif
 630
 631 int synaptics_init(struct psmouse *psmouse)
 632 {
 633         struct synaptics_data *priv;
 634
 635         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 636         if (!priv)
 637                 return -1;
 638
 639         if (synaptics_query_hardware(psmouse)) {
 640                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 641                 goto init_fail;
 642         }
 643
 644         if (synaptics_set_absolute_mode(psmouse)) {
 645                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 646                 goto init_fail;
 647         }
 648
 649         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 650
 651         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",
 652                 SYN_ID_MODEL(priv->identity),
 653                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 654                 priv->model_id, priv->capabilities, priv->ext_cap);
 655
 656         set_input_params(psmouse->dev, priv);
 657
 658         /*
 659          * Encode touchpad model so that it can be used to set
 660          * input device->id.version and be visible to userspace.
 661          * Because version is __u16 we have to drop something.
 662          * Hardware info bits seem to be good candidates as they
 663          * are documented to be for Synaptics corp. internal use.
 664          */
 665         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
 666                           (priv->model_id & 0x000000ff);
 667
 668         psmouse->protocol_handler = synaptics_process_byte;
 669         psmouse->set_rate = synaptics_set_rate;
 670         psmouse->disconnect = synaptics_disconnect;
 671         psmouse->reconnect = synaptics_reconnect;
 672         psmouse->cleanup = synaptics_reset;
 673         psmouse->pktsize = 6;
 674         /* Synaptics can usually stay in sync without extra help */
 675         psmouse->resync_time = 0;
 676
 677         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 678                 synaptics_pt_create(psmouse);
 679
 680 #if defined(__i386__)
 681         /*
 682          * Toshiba's KBC seems to have trouble handling data from
 683          * Synaptics as full rate, switch to lower rate which is roughly
 684          * thye same as rate of standard PS/2 mouse.
 685          */
 686         if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
 687                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 688                         dmi_get_system_info(DMI_PRODUCT_NAME));
 689                 psmouse->rate = 40;
 690         }
 691 #endif
 692
 693         return 0;
 694
 695  init_fail:
 696         kfree(priv);
 697         return -1;
 698 }
 699
 700 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
 701
 702 int synaptics_init(struct psmouse *psmouse)
 703 {
 704         return -ENOSYS;
 705 }
 706
 707 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
 708