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  *      Synaptics communications functions
  45  ****************************************************************************/
  46
  47 /*
  48  * Send a command to the synpatics touchpad by special commands
  49  */
  50 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
  51 {
  52         if (psmouse_sliced_command(psmouse, c))
  53                 return -1;
  54         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
  55                 return -1;
  56         return 0;
  57 }
  58
  59 /*
  60  * Set the synaptics touchpad mode byte by special commands
  61  */
  62 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
  63 {
  64         unsigned char param[1];
  65
  66         if (psmouse_sliced_command(psmouse, mode))
  67                 return -1;
  68         param[0] = SYN_PS_SET_MODE2;
  69         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
  70                 return -1;
  71         return 0;
  72 }
  73
  74 /*
  75  * Read the model-id bytes from the touchpad
  76  * see also SYN_MODEL_* macros
  77  */
  78 static int synaptics_model_id(struct psmouse *psmouse)
  79 {
  80         struct synaptics_data *priv = psmouse->private;
  81         unsigned char mi[3];
  82
  83         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
  84                 return -1;
  85         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
  86         return 0;
  87 }
  88
  89 /*
  90  * Read the capability-bits from the touchpad
  91  * see also the SYN_CAP_* macros
  92  */
  93 static int synaptics_capability(struct psmouse *psmouse)
  94 {
  95         struct synaptics_data *priv = psmouse->private;
  96         unsigned char cap[3];
  97
  98         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
  99                 return -1;
 100         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 101         priv->ext_cap = 0;
 102         if (!SYN_CAP_VALID(priv->capabilities))
 103                 return -1;
 104
 105         /*
 106          * Unless capExtended is set the rest of the flags should be ignored
 107          */
 108         if (!SYN_CAP_EXTENDED(priv->capabilities))
 109                 priv->capabilities = 0;
 110
 111         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
 112                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
 113                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
 114                                " but I'm not able to read them.");
 115                 } else {
 116                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
 117
 118                         /*
 119                          * if nExtBtn is greater than 8 it should be considered
 120                          * invalid and treated as 0
 121                          */
 122                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
 123                                 priv->ext_cap &= 0xff0fff;
 124                 }
 125         }
 126         return 0;
 127 }
 128
 129 /*
 130  * Identify Touchpad
 131  * See also the SYN_ID_* macros
 132  */
 133 static int synaptics_identify(struct psmouse *psmouse)
 134 {
 135         struct synaptics_data *priv = psmouse->private;
 136         unsigned char id[3];
 137
 138         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
 139                 return -1;
 140         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
 141         if (SYN_ID_IS_SYNAPTICS(priv->identity))
 142                 return 0;
 143         return -1;
 144 }
 145
 146 static int synaptics_query_hardware(struct psmouse *psmouse)
 147 {
 148         int retries = 0;
 149
 150         while ((retries++ < 3) && psmouse_reset(psmouse))
 151                 printk(KERN_ERR "synaptics reset failed\n");
 152
 153         if (synaptics_identify(psmouse))
 154                 return -1;
 155         if (synaptics_model_id(psmouse))
 156                 return -1;
 157         if (synaptics_capability(psmouse))
 158                 return -1;
 159
 160         return 0;
 161 }
 162
 163 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
 164 {
 165         struct synaptics_data *priv = psmouse->private;
 166
 167         priv->mode = SYN_BIT_ABSOLUTE_MODE;
 168         if (SYN_ID_MAJOR(priv->identity) >= 4)
 169                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
 170         if (SYN_CAP_EXTENDED(priv->capabilities))
 171                 priv->mode |= SYN_BIT_W_MODE;
 172
 173         if (synaptics_mode_cmd(psmouse, priv->mode))
 174                 return -1;
 175
 176         return 0;
 177 }
 178
 179 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
 180 {
 181         struct synaptics_data *priv = psmouse->private;
 182
 183         if (rate >= 80) {
 184                 priv->mode |= SYN_BIT_HIGH_RATE;
 185                 psmouse->rate = 80;
 186         } else {
 187                 priv->mode &= ~SYN_BIT_HIGH_RATE;
 188                 psmouse->rate = 40;
 189         }
 190
 191         synaptics_mode_cmd(psmouse, priv->mode);
 192 }
 193
 194 /*****************************************************************************
 195  *      Synaptics pass-through PS/2 port support
 196  ****************************************************************************/
 197 static int synaptics_pt_write(struct serio *serio, unsigned char c)
 198 {
 199         struct psmouse *parent = serio_get_drvdata(serio->parent);
 200         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
 201
 202         if (psmouse_sliced_command(parent, c))
 203                 return -1;
 204         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
 205                 return -1;
 206         return 0;
 207 }
 208
 209 static inline int synaptics_is_pt_packet(unsigned char *buf)
 210 {
 211         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
 212 }
 213
 214 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
 215 {
 216         struct psmouse *child = serio_get_drvdata(ptport);
 217
 218         if (child && child->state == PSMOUSE_ACTIVATED) {
 219                 serio_interrupt(ptport, packet[1], 0);
 220                 serio_interrupt(ptport, packet[4], 0);
 221                 serio_interrupt(ptport, packet[5], 0);
 222                 if (child->pktsize == 4)
 223                         serio_interrupt(ptport, packet[2], 0);
 224         } else
 225                 serio_interrupt(ptport, packet[1], 0);
 226 }
 227
 228 static void synaptics_pt_activate(struct psmouse *psmouse)
 229 {
 230         struct serio *ptport = psmouse->ps2dev.serio->child;
 231         struct psmouse *child = serio_get_drvdata(ptport);
 232         struct synaptics_data *priv = psmouse->private;
 233
 234         /* adjust the touchpad to child's choice of protocol */
 235         if (child) {
 236                 if (child->pktsize == 4)
 237                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
 238                 else
 239                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
 240
 241                 if (synaptics_mode_cmd(psmouse, priv->mode))
 242                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
 243         }
 244 }
 245
 246 static void synaptics_pt_create(struct psmouse *psmouse)
 247 {
 248         struct serio *serio;
 249
 250         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
 251         if (!serio) {
 252                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
 253                 return;
 254         }
 255
 256         serio->id.type = SERIO_PS_PSTHRU;
 257         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 258         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 259         serio->write = synaptics_pt_write;
 260         serio->parent = psmouse->ps2dev.serio;
 261
 262         psmouse->pt_activate = synaptics_pt_activate;
 263
 264         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 265         serio_register_port(serio);
 266 }
 267
 268 /*****************************************************************************
 269  *      Functions to interpret the absolute mode packets
 270  ****************************************************************************/
 271
 272 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 273 {
 274         memset(hw, 0, sizeof(struct synaptics_hw_state));
 275
 276         if (SYN_MODEL_NEWABS(priv->model_id)) {
 277                 hw->x = (((buf[3] & 0x10) << 8) |
 278                          ((buf[1] & 0x0f) << 8) |
 279                          buf[4]);
 280                 hw->y = (((buf[3] & 0x20) << 7) |
 281                          ((buf[1] & 0xf0) << 4) |
 282                          buf[5]);
 283
 284                 hw->z = buf[2];
 285                 hw->w = (((buf[0] & 0x30) >> 2) |
 286                          ((buf[0] & 0x04) >> 1) |
 287                          ((buf[3] & 0x04) >> 2));
 288
 289                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 290                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 291
 292                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 293                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 294                         if (hw->w == 2)
 295                                 hw->scroll = (signed char)(buf[1]);
 296                 }
 297
 298                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 299                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 300                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 301                 }
 302
 303                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 304                     ((buf[0] ^ buf[3]) & 0x02)) {
 305                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 306                         default:
 307                                 /*
 308                                  * if nExtBtn is greater than 8 it should be
 309                                  * considered invalid and treated as 0
 310                                  */
 311                                 break;
 312                         case 8:
 313                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 314                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 315                         case 6:
 316                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 317                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 318                         case 4:
 319                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 320                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 321                         case 2:
 322                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 323                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 324                         }
 325                 }
 326         } else {
 327                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 328                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 329
 330                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 331                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 332
 333                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 334                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 335         }
 336 }
 337
 338 /*
 339  *  called for each full received packet from the touchpad
 340  */
 341 static void synaptics_process_packet(struct psmouse *psmouse)
 342 {
 343         struct input_dev *dev = psmouse->dev;
 344         struct synaptics_data *priv = psmouse->private;
 345         struct synaptics_hw_state hw;
 346         int num_fingers;
 347         int finger_width;
 348         int i;
 349
 350         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
 351
 352         if (hw.scroll) {
 353                 priv->scroll += hw.scroll;
 354
 355                 while (priv->scroll >= 4) {
 356                         input_report_key(dev, BTN_BACK, !hw.down);
 357                         input_sync(dev);
 358                         input_report_key(dev, BTN_BACK, hw.down);
 359                         input_sync(dev);
 360                         priv->scroll -= 4;
 361                 }
 362                 while (priv->scroll <= -4) {
 363                         input_report_key(dev, BTN_FORWARD, !hw.up);
 364                         input_sync(dev);
 365                         input_report_key(dev, BTN_FORWARD, hw.up);
 366                         input_sync(dev);
 367                         priv->scroll += 4;
 368                 }
 369                 return;
 370         }
 371
 372         if (hw.z > 0) {
 373                 num_fingers = 1;
 374                 finger_width = 5;
 375                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 376                         switch (hw.w) {
 377                         case 0 ... 1:
 378                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 379                                         num_fingers = hw.w + 2;
 380                                 break;
 381                         case 2:
 382                                 if (SYN_MODEL_PEN(priv->model_id))
 383                                         ;   /* Nothing, treat a pen as a single finger */
 384                                 break;
 385                         case 4 ... 15:
 386                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 387                                         finger_width = hw.w;
 388                                 break;
 389                         }
 390                 }
 391         } else {
 392                 num_fingers = 0;
 393                 finger_width = 0;
 394         }
 395
 396         /* Post events
 397          * BTN_TOUCH has to be first as mousedev relies on it when doing
 398          * absolute -> relative conversion
 399          */
 400         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 401         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 402
 403         if (hw.z > 0) {
 404                 input_report_abs(dev, ABS_X, hw.x);
 405                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 406         }
 407         input_report_abs(dev, ABS_PRESSURE, hw.z);
 408
 409         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 410         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 411         input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 412         input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 413
 414         input_report_key(dev, BTN_LEFT, hw.left);
 415         input_report_key(dev, BTN_RIGHT, hw.right);
 416
 417         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 418                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 419
 420         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 421                 input_report_key(dev, BTN_FORWARD, hw.up);
 422                 input_report_key(dev, BTN_BACK, hw.down);
 423         }
 424
 425         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 426                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 427
 428         input_sync(dev);
 429 }
 430
 431 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 432 {
 433         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 434         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 435         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 436         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 437         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 438
 439         if (idx < 0 || idx > 4)
 440                 return 0;
 441
 442         switch (pkt_type) {
 443                 case SYN_NEWABS:
 444                 case SYN_NEWABS_RELAXED:
 445                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 446
 447                 case SYN_NEWABS_STRICT:
 448                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 449
 450                 case SYN_OLDABS:
 451                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 452
 453                 default:
 454                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 455                         return 0;
 456         }
 457 }
 458
 459 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 460 {
 461         int i;
 462
 463         for (i = 0; i < 5; i++)
 464                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 465                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 466                         return SYN_NEWABS_RELAXED;
 467                 }
 468
 469         return SYN_NEWABS_STRICT;
 470 }
 471
 472 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
 473 {
 474         struct synaptics_data *priv = psmouse->private;
 475
 476         if (psmouse->pktcnt >= 6) { /* Full packet received */
 477                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 478                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 479
 480                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
 481                         if (psmouse->ps2dev.serio->child)
 482                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
 483                 } else
 484                         synaptics_process_packet(psmouse);
 485
 486                 return PSMOUSE_FULL_PACKET;
 487         }
 488
 489         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 490                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 491 }
 492
 493 /*****************************************************************************
 494  *      Driver initialization/cleanup functions
 495  ****************************************************************************/
 496 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 497 {
 498         int i;
 499
 500         set_bit(EV_ABS, dev->evbit);
 501         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
 502         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
 503         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 504         set_bit(ABS_TOOL_WIDTH, dev->absbit);
 505
 506         set_bit(EV_KEY, dev->evbit);
 507         set_bit(BTN_TOUCH, dev->keybit);
 508         set_bit(BTN_TOOL_FINGER, dev->keybit);
 509         set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 510         set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 511
 512         set_bit(BTN_LEFT, dev->keybit);
 513         set_bit(BTN_RIGHT, dev->keybit);
 514
 515         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 516                 set_bit(BTN_MIDDLE, dev->keybit);
 517
 518         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 519             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 520                 set_bit(BTN_FORWARD, dev->keybit);
 521                 set_bit(BTN_BACK, dev->keybit);
 522         }
 523
 524         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 525                 set_bit(BTN_0 + i, dev->keybit);
 526
 527         clear_bit(EV_REL, dev->evbit);
 528         clear_bit(REL_X, dev->relbit);
 529         clear_bit(REL_Y, dev->relbit);
 530 }
 531
 532 void synaptics_reset(struct psmouse *psmouse)
 533 {
 534         /* reset touchpad back to relative mode, gestures enabled */
 535         synaptics_mode_cmd(psmouse, 0);
 536 }
 537
 538 static void synaptics_disconnect(struct psmouse *psmouse)
 539 {
 540         synaptics_reset(psmouse);
 541         kfree(psmouse->private);
 542         psmouse->private = NULL;
 543 }
 544
 545 static int synaptics_reconnect(struct psmouse *psmouse)
 546 {
 547         struct synaptics_data *priv = psmouse->private;
 548         struct synaptics_data old_priv = *priv;
 549
 550         if (synaptics_detect(psmouse, 0))
 551                 return -1;
 552
 553         if (synaptics_query_hardware(psmouse)) {
 554                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 555                 return -1;
 556         }
 557
 558         if (old_priv.identity != priv->identity ||
 559             old_priv.model_id != priv->model_id ||
 560             old_priv.capabilities != priv->capabilities ||
 561             old_priv.ext_cap != priv->ext_cap)
 562                 return -1;
 563
 564         if (synaptics_set_absolute_mode(psmouse)) {
 565                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 566                 return -1;
 567         }
 568
 569         return 0;
 570 }
 571
 572 int synaptics_detect(struct psmouse *psmouse, int set_properties)
 573 {
 574         struct ps2dev *ps2dev = &psmouse->ps2dev;
 575         unsigned char param[4];
 576
 577         param[0] = 0;
 578
 579         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 580         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 581         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 582         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 583         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 584
 585         if (param[1] != 0x47)
 586                 return -1;
 587
 588         if (set_properties) {
 589                 psmouse->vendor = "Synaptics";
 590                 psmouse->name = "TouchPad";
 591         }
 592
 593         return 0;
 594 }
 595
 596 #if defined(__i386__)
 597 #include <linux/dmi.h>
 598 static struct dmi_system_id toshiba_dmi_table[] = {
 599         {
 600                 .ident = "Toshiba Satellite",
 601                 .matches = {
 602                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 603                         DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
 604                 },
 605         },
 606         {
 607                 .ident = "Toshiba Dynabook",
 608                 .matches = {
 609                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 610                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
 611                 },
 612         },
 613         {
 614                 .ident = "Toshiba Portege M300",
 615                 .matches = {
 616                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 617                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
 618                 },
 619         },
 620         { }
 621 };
 622 #endif
 623
 624 int synaptics_init(struct psmouse *psmouse)
 625 {
 626         struct synaptics_data *priv;
 627
 628         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 629         if (!priv)
 630                 return -1;
 631
 632         if (synaptics_query_hardware(psmouse)) {
 633                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 634                 goto init_fail;
 635         }
 636
 637         if (synaptics_set_absolute_mode(psmouse)) {
 638                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 639                 goto init_fail;
 640         }
 641
 642         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 643
 644         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",
 645                 SYN_ID_MODEL(priv->identity),
 646                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 647                 priv->model_id, priv->capabilities, priv->ext_cap);
 648
 649         set_input_params(psmouse->dev, priv);
 650
 651         psmouse->protocol_handler = synaptics_process_byte;
 652         psmouse->set_rate = synaptics_set_rate;
 653         psmouse->disconnect = synaptics_disconnect;
 654         psmouse->reconnect = synaptics_reconnect;
 655         psmouse->pktsize = 6;
 656         /* Synaptics can usually stay in sync without extra help */
 657         psmouse->resync_time = 0;
 658
 659         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 660                 synaptics_pt_create(psmouse);
 661
 662 #if defined(__i386__)
 663         /*
 664          * Toshiba's KBC seems to have trouble handling data from
 665          * Synaptics as full rate, switch to lower rate which is roughly
 666          * thye same as rate of standard PS/2 mouse.
 667          */
 668         if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
 669                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 670                         dmi_get_system_info(DMI_PRODUCT_NAME));
 671                 psmouse->rate = 40;
 672         }
 673 #endif
 674
 675         return 0;
 676
 677  init_fail:
 678         kfree(priv);
 679         return -1;
 680 }
 681
 682