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, NULL);
 220                 serio_interrupt(ptport, packet[4], 0, NULL);
 221                 serio_interrupt(ptport, packet[5], 0, NULL);
 222                 if (child->pktsize == 4)
 223                         serio_interrupt(ptport, packet[2], 0, NULL);
 224         } else
 225                 serio_interrupt(ptport, packet[1], 0, NULL);
 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 = kmalloc(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         memset(serio, 0, sizeof(struct serio));
 257
 258         serio->id.type = SERIO_PS_PSTHRU;
 259         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
 260         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
 261         serio->write = synaptics_pt_write;
 262         serio->parent = psmouse->ps2dev.serio;
 263
 264         psmouse->pt_activate = synaptics_pt_activate;
 265
 266         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
 267         serio_register_port(serio);
 268 }
 269
 270 /*****************************************************************************
 271  *      Functions to interpret the absolute mode packets
 272  ****************************************************************************/
 273
 274 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
 275 {
 276         memset(hw, 0, sizeof(struct synaptics_hw_state));
 277
 278         if (SYN_MODEL_NEWABS(priv->model_id)) {
 279                 hw->x = (((buf[3] & 0x10) << 8) |
 280                          ((buf[1] & 0x0f) << 8) |
 281                          buf[4]);
 282                 hw->y = (((buf[3] & 0x20) << 7) |
 283                          ((buf[1] & 0xf0) << 4) |
 284                          buf[5]);
 285
 286                 hw->z = buf[2];
 287                 hw->w = (((buf[0] & 0x30) >> 2) |
 288                          ((buf[0] & 0x04) >> 1) |
 289                          ((buf[3] & 0x04) >> 2));
 290
 291                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 292                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 293
 294                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 295                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 296                         if (hw->w == 2)
 297                                 hw->scroll = (signed char)(buf[1]);
 298                 }
 299
 300                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 301                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
 302                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
 303                 }
 304
 305                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
 306                     ((buf[0] ^ buf[3]) & 0x02)) {
 307                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
 308                         default:
 309                                 /*
 310                                  * if nExtBtn is greater than 8 it should be
 311                                  * considered invalid and treated as 0
 312                                  */
 313                                 break;
 314                         case 8:
 315                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
 316                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
 317                         case 6:
 318                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
 319                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
 320                         case 4:
 321                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
 322                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
 323                         case 2:
 324                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
 325                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
 326                         }
 327                 }
 328         } else {
 329                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
 330                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
 331
 332                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
 333                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
 334
 335                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
 336                 hw->right = (buf[0] & 0x02) ? 1 : 0;
 337         }
 338 }
 339
 340 /*
 341  *  called for each full received packet from the touchpad
 342  */
 343 static void synaptics_process_packet(struct psmouse *psmouse)
 344 {
 345         struct input_dev *dev = psmouse->dev;
 346         struct synaptics_data *priv = psmouse->private;
 347         struct synaptics_hw_state hw;
 348         int num_fingers;
 349         int finger_width;
 350         int i;
 351
 352         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
 353
 354         if (hw.scroll) {
 355                 priv->scroll += hw.scroll;
 356
 357                 while (priv->scroll >= 4) {
 358                         input_report_key(dev, BTN_BACK, !hw.down);
 359                         input_sync(dev);
 360                         input_report_key(dev, BTN_BACK, hw.down);
 361                         input_sync(dev);
 362                         priv->scroll -= 4;
 363                 }
 364                 while (priv->scroll <= -4) {
 365                         input_report_key(dev, BTN_FORWARD, !hw.up);
 366                         input_sync(dev);
 367                         input_report_key(dev, BTN_FORWARD, hw.up);
 368                         input_sync(dev);
 369                         priv->scroll += 4;
 370                 }
 371                 return;
 372         }
 373
 374         if (hw.z > 0) {
 375                 num_fingers = 1;
 376                 finger_width = 5;
 377                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
 378                         switch (hw.w) {
 379                         case 0 ... 1:
 380                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
 381                                         num_fingers = hw.w + 2;
 382                                 break;
 383                         case 2:
 384                                 if (SYN_MODEL_PEN(priv->model_id))
 385                                         ;   /* Nothing, treat a pen as a single finger */
 386                                 break;
 387                         case 4 ... 15:
 388                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
 389                                         finger_width = hw.w;
 390                                 break;
 391                         }
 392                 }
 393         } else {
 394                 num_fingers = 0;
 395                 finger_width = 0;
 396         }
 397
 398         /* Post events
 399          * BTN_TOUCH has to be first as mousedev relies on it when doing
 400          * absolute -> relative conversion
 401          */
 402         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
 403         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
 404
 405         if (hw.z > 0) {
 406                 input_report_abs(dev, ABS_X, hw.x);
 407                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
 408         }
 409         input_report_abs(dev, ABS_PRESSURE, hw.z);
 410
 411         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
 412         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
 413         input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 414         input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 415
 416         input_report_key(dev, BTN_LEFT, hw.left);
 417         input_report_key(dev, BTN_RIGHT, hw.right);
 418
 419         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 420                 input_report_key(dev, BTN_MIDDLE, hw.middle);
 421
 422         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
 423                 input_report_key(dev, BTN_FORWARD, hw.up);
 424                 input_report_key(dev, BTN_BACK, hw.down);
 425         }
 426
 427         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 428                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
 429
 430         input_sync(dev);
 431 }
 432
 433 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
 434 {
 435         static unsigned char newabs_mask[]      = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
 436         static unsigned char newabs_rel_mask[]  = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
 437         static unsigned char newabs_rslt[]      = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
 438         static unsigned char oldabs_mask[]      = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
 439         static unsigned char oldabs_rslt[]      = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
 440
 441         if (idx < 0 || idx > 4)
 442                 return 0;
 443
 444         switch (pkt_type) {
 445                 case SYN_NEWABS:
 446                 case SYN_NEWABS_RELAXED:
 447                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
 448
 449                 case SYN_NEWABS_STRICT:
 450                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
 451
 452                 case SYN_OLDABS:
 453                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
 454
 455                 default:
 456                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
 457                         return 0;
 458         }
 459 }
 460
 461 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
 462 {
 463         int i;
 464
 465         for (i = 0; i < 5; i++)
 466                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
 467                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
 468                         return SYN_NEWABS_RELAXED;
 469                 }
 470
 471         return SYN_NEWABS_STRICT;
 472 }
 473
 474 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
 475 {
 476         struct input_dev *dev = psmouse->dev;
 477         struct synaptics_data *priv = psmouse->private;
 478
 479         input_regs(dev, regs);
 480
 481         if (psmouse->pktcnt >= 6) { /* Full packet received */
 482                 if (unlikely(priv->pkt_type == SYN_NEWABS))
 483                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
 484
 485                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
 486                         if (psmouse->ps2dev.serio->child)
 487                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
 488                 } else
 489                         synaptics_process_packet(psmouse);
 490
 491                 return PSMOUSE_FULL_PACKET;
 492         }
 493
 494         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
 495                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
 496 }
 497
 498 /*****************************************************************************
 499  *      Driver initialization/cleanup functions
 500  ****************************************************************************/
 501 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
 502 {
 503         int i;
 504
 505         set_bit(EV_ABS, dev->evbit);
 506         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
 507         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
 508         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
 509         set_bit(ABS_TOOL_WIDTH, dev->absbit);
 510
 511         set_bit(EV_KEY, dev->evbit);
 512         set_bit(BTN_TOUCH, dev->keybit);
 513         set_bit(BTN_TOOL_FINGER, dev->keybit);
 514         set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
 515         set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
 516
 517         set_bit(BTN_LEFT, dev->keybit);
 518         set_bit(BTN_RIGHT, dev->keybit);
 519
 520         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
 521                 set_bit(BTN_MIDDLE, dev->keybit);
 522
 523         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
 524             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
 525                 set_bit(BTN_FORWARD, dev->keybit);
 526                 set_bit(BTN_BACK, dev->keybit);
 527         }
 528
 529         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
 530                 set_bit(BTN_0 + i, dev->keybit);
 531
 532         clear_bit(EV_REL, dev->evbit);
 533         clear_bit(REL_X, dev->relbit);
 534         clear_bit(REL_Y, dev->relbit);
 535 }
 536
 537 void synaptics_reset(struct psmouse *psmouse)
 538 {
 539         /* reset touchpad back to relative mode, gestures enabled */
 540         synaptics_mode_cmd(psmouse, 0);
 541 }
 542
 543 static void synaptics_disconnect(struct psmouse *psmouse)
 544 {
 545         synaptics_reset(psmouse);
 546         kfree(psmouse->private);
 547         psmouse->private = NULL;
 548 }
 549
 550 static int synaptics_reconnect(struct psmouse *psmouse)
 551 {
 552         struct synaptics_data *priv = psmouse->private;
 553         struct synaptics_data old_priv = *priv;
 554
 555         if (synaptics_detect(psmouse, 0))
 556                 return -1;
 557
 558         if (synaptics_query_hardware(psmouse)) {
 559                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 560                 return -1;
 561         }
 562
 563         if (old_priv.identity != priv->identity ||
 564             old_priv.model_id != priv->model_id ||
 565             old_priv.capabilities != priv->capabilities ||
 566             old_priv.ext_cap != priv->ext_cap)
 567                 return -1;
 568
 569         if (synaptics_set_absolute_mode(psmouse)) {
 570                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 571                 return -1;
 572         }
 573
 574         return 0;
 575 }
 576
 577 int synaptics_detect(struct psmouse *psmouse, int set_properties)
 578 {
 579         struct ps2dev *ps2dev = &psmouse->ps2dev;
 580         unsigned char param[4];
 581
 582         param[0] = 0;
 583
 584         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 585         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 586         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 587         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
 588         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
 589
 590         if (param[1] != 0x47)
 591                 return -1;
 592
 593         if (set_properties) {
 594                 psmouse->vendor = "Synaptics";
 595                 psmouse->name = "TouchPad";
 596         }
 597
 598         return 0;
 599 }
 600
 601 #if defined(__i386__)
 602 #include <linux/dmi.h>
 603 static struct dmi_system_id toshiba_dmi_table[] = {
 604         {
 605                 .ident = "Toshiba Satellite",
 606                 .matches = {
 607                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 608                         DMI_MATCH(DMI_PRODUCT_NAME , "Satellite"),
 609                 },
 610         },
 611         {
 612                 .ident = "Toshiba Dynabook",
 613                 .matches = {
 614                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
 615                         DMI_MATCH(DMI_PRODUCT_NAME , "dynabook"),
 616                 },
 617         },
 618         { }
 619 };
 620 #endif
 621
 622 int synaptics_init(struct psmouse *psmouse)
 623 {
 624         struct synaptics_data *priv;
 625
 626         psmouse->private = priv = kmalloc(sizeof(struct synaptics_data), GFP_KERNEL);
 627         if (!priv)
 628                 return -1;
 629         memset(priv, 0, sizeof(struct synaptics_data));
 630
 631         if (synaptics_query_hardware(psmouse)) {
 632                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
 633                 goto init_fail;
 634         }
 635
 636         if (synaptics_set_absolute_mode(psmouse)) {
 637                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
 638                 goto init_fail;
 639         }
 640
 641         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
 642
 643         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",
 644                 SYN_ID_MODEL(priv->identity),
 645                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
 646                 priv->model_id, priv->capabilities, priv->ext_cap);
 647
 648         set_input_params(psmouse->dev, priv);
 649
 650         psmouse->protocol_handler = synaptics_process_byte;
 651         psmouse->set_rate = synaptics_set_rate;
 652         psmouse->disconnect = synaptics_disconnect;
 653         psmouse->reconnect = synaptics_reconnect;
 654         psmouse->pktsize = 6;
 655         /* Synaptics can usually stay in sync without extra help */
 656         psmouse->resync_time = 0;
 657
 658         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
 659                 synaptics_pt_create(psmouse);
 660
 661 #if defined(__i386__)
 662         /*
 663          * Toshiba's KBC seems to have trouble handling data from
 664          * Synaptics as full rate, switch to lower rate which is roughly
 665          * thye same as rate of standard PS/2 mouse.
 666          */
 667         if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
 668                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
 669                         dmi_get_system_info(DMI_PRODUCT_NAME));
 670                 psmouse->rate = 40;
 671         }
 672 #endif
 673
 674         return 0;
 675
 676  init_fail:
 677         kfree(priv);
 678         return -1;
 679 }
 680
 681